diff --git a/20181011/Zeichen_123.pdf b/20181011/Zeichen_123.pdf
deleted file mode 120000
index fdbc897227df059cfda790a16555e6e417682116..0000000000000000000000000000000000000000
--- a/20181011/Zeichen_123.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/Zeichen_123.pdf
\ No newline at end of file
diff --git a/20181011/csa2.jpg b/20181011/csa2.jpg
deleted file mode 120000
index b5bd4b2df223c36917de442b4e198aa46787f05b..0000000000000000000000000000000000000000
--- a/20181011/csa2.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/csa2.jpg
\ No newline at end of file
diff --git a/20181011/es-20181011.pdf b/20181011/es-20181011.pdf
deleted file mode 100644
index 07d075d13915032327e603b69e186f1116c70ec6..0000000000000000000000000000000000000000
Binary files a/20181011/es-20181011.pdf and /dev/null differ
diff --git a/20181011/es-20181011.tex b/20181011/es-20181011.tex
deleted file mode 100644
index 213fabe199700200fbb1e744f5ffbf13212439d6..0000000000000000000000000000000000000000
--- a/20181011/es-20181011.tex
+++ /dev/null
@@ -1,574 +0,0 @@
-% es-20181011.pdf - Lecture Slides on Embedded Systems
-% Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-# README: Einführung: eingebettete Systeme, Unix-Kommandozeile
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{rotating}
-\usepackage{tikz}
-
-\newcommand{\underconstruction}{%
- \begin{picture}(0,0)
- \put(9,0.9){\makebox(0,0)[b]{\includegraphics[width=1.5cm]{Zeichen_123.pdf}}}
- \put(9,0.6){\makebox(0,0)[t]{\shortstack{Änderungen\\vorbehalten}}}
- \end{picture}}
-
-\title{Eingebettete Systeme}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{11.\ Oktober 2018}
-
-\newcommand{\ItwoC}{I\raisebox{0.5ex}{\footnotesize 2}C}
-
-\begin{document}
-
-%\maketitleframe
-
-\begin{frame}[plain]
-
- \vspace*{8cm}
- \begin{picture}(0,0)
-% \put(12.3,8.0){\makebox(0,0)[tr]{\LARGE\bf\color{gray}\shortstack[r]{%
-% {\normalsize Software-Entwicklung für}\\[0.5ex]
- \put(12.3,8.0){\makebox(0,0)[tr]{\LARGE\bf\color{gray}\shortstack[r]{%
- Eingebettete Systeme\\[2ex]
- \includegraphics[width=4.3cm]{logo-hochschule-bochum.pdf}}}}
- %\put(9.5,6.677) % zum Vergleich
- \put(0.0,8.0){\makebox(0,0)[tl]{\includegraphics[width=2.87cm]{logo-hochschule-bochum-cvh-text-v2.pdf}}}
- \end{picture}%
- \begin{picture}(-0.3,-0.5)
- \put(0,0.5){\includegraphics[width=5.6cm]{floppys.jpg}}
- \end{picture}%
- \begin{picture}(0,0)
- \put(1.9,2.8){\includegraphics[width=6.3cm]{hexapode.png}}
- \end{picture}%
- \begin{picture}(0,0)
- \put(6.1,-0.7){\includegraphics[width=6cm]{csa2.jpg}}
- \end{picture}
- \begin{picture}(0,0)
- \put(0.2,-0.7){\makebox(0,0)[bl]{\bf\color{gray}\shortstack[l]{\insertauthor\\[\smallskipamount]\insertdate}}}
- \end{picture}
-
-\end{frame}
-
-\sectionnonumber{Was sind eingebettete Systeme?}
-
-\begin{frame}
-
- \showsectionnonumber
-
- \emph{Der Ausdruck \textbf{\newterm{eingebettetes System\/}} (\dots\,) bezeichnet
- einen elektronischen Rechner oder auch Computer,
- der in einen technischen Kontext eingebunden (eingebettet) ist.}
- \vspace*{-0.5cm}
- \begin{flushright}
- \url{https://de.wikipedia.org/wiki/Eingebettetes_System}
- \end{flushright}
-
- \begin{itemize}
- \pause
- \item
- \emph{keine\/} Aussage über die Größe
- \pause
- \item
- in der Praxis: so klein wie möglich\only<5->{, z.\,B.:}\\[\smallskipamount]
- \only<4>{\vspace*{-3.3cm}\hspace*{0.7cm}\includegraphics[height=8cm]{csa2.jpg}\hspace*{-1cm}\vspace*{-8cm}}
- \pause
- \pause
- \begin{itemize}
- \item
- mehrere Rechnerschränke
- \item
- Industrie-PC
- \item
- Einplatinencomputer
- \item
- Mikro-Controller
- \end{itemize}
- \pause
- \item
- Bedienung über spezielle Ein-/Ausgabegeräte (z.\,B.\ Flugsimulator, Telefon)
- \pause
- \item
- Wartung über speziellen Adminstrator-Zugang
- \begin{itemize}
- \item
- Bus-Schnittstelle (RS-232, CAN-BUS)
- \item
- Netzwerk (TCP/IP, Ethernet oder WLAN)
- \end{itemize}
- \pause
- \item
- Programmierung oft außerhalb des Systems\\
- (Cross-Entwicklungswerkzeuge)
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\sectionnonumber{In dieser Lehrveranstaltung}
-
-\begin{frame}
-
- \showsectionnonumber
- \vspace*{-\medskipamount}
- \begin{itemize}
- \item
- Einführung in Unix
- \item
- TCP/IP und Bus-Systeme in der Praxis
- \item
- C-Programmierung für Fortgeschrittene
- \item
- Einführung in die Echtzeitprogrammierung
- \item
- Prüfungsleistung: Projektaufgabe\\
- Eingebettetes System eigener Wahl zum Laufen bringen
- \arrowitem
- {\color{red}Projektaufgabe überlegen}
- \end{itemize}
-
- \bigskip
-
- {\color{gray}
- Weitere Ideen:
- \begin{itemize}
- \item[\color{gray}$\bullet$]\color{gray}
- Exkursion: TFC -- Simulatoren und Technik GmbH, Velbert-Nierenhof
- \item[\color{gray}$\bullet$]\color{gray}
- Einführung in die GUI-Programmierung
- \item[\color{gray}$\bullet$]\color{gray}
- Web-Interfaces
- \end{itemize}}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \begin{itemize}
- \color{medgreen}
- \item[1.1] Was sind eingebettete Systeme?
- \item[1.2] Vertiefung Systemtechnik
- \item[1.3] In dieser Lehrveranstaltung
- \end{itemize}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \item[2.1] \color{red}Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \item[2.3] Dateisysteme
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
-% \item[\dots]
- \end{itemize}
- \color{gray}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\setcounter{section}{1}
-\section{Einführung in Unix}
-
-\subsection{Grundkonzepte}
-
-\begin{frame}
-
- \begin{minipage}[b]{6.5cm}
- \showsection
- \vspace{-\medskipamount}
- \showsubsection
- \end{minipage}
-
- \begin{description}
- \addtolength{\leftskip}{-1cm}
- \item[1965]
- Vorgänger: Multics (Multiplexed Information and Computing Service)\\
- "`überladen"'
- \item[1970]
- Unix: Einfachheit als Grundkonzept
- \item[1972]
- Umstellung auf neu entwickelte Programmiersprache C
- \item[1975]
- AT\&T: Unix inkl.\ Quelltext für Universitäten
- \item[1977]
- Berkeley Software Distribution (BSD)
- \item[1983]
- GNU-Projekt
- \item[1987]
- Minix
- \item[1991]
- Linux
- \item[1993]
- FreeBSD, NetBSD
- \item[1994]
- OpenBSD
- \item[2000]
- Darwin (Mac OS X, BSD-basiert)
- \item[2008]
- Android (Linux-basiert)
- \end{description}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \begin{minipage}[b]{6.5cm}
- \showsection
- \vspace{-\medskipamount}
- \showsubsection
-
- Unix und C: Einfachheit als Grundkonzept
-% \vspace{-\bigskipamount}
- \begin{itemize}
- \item
- Vermeiden von Ausnahmen
- \item[\color{lightgray}$\bullet$]
- \color{lightgray}Baukastensystem
- \end{itemize}
- \end{minipage}\hspace*{0.5cm}%
- \begin{minipage}[b]{5cm}
- \small
- C: Hauptprogramm\\
- = "`normale"' Funktion
-
- \medskip
-
- \begin{lstlisting}[gobble=6]
- int main (int argc, char **argv)
- {
- printf ("Hello, world!\n");
- return 0;
- }
- \end{lstlisting}
- \vspace{-\bigskipamount}
- \end{minipage}
-
- \bigskip
- \bigskip
-
- Unix: übergeordnetes Verzeichnis = "`normales"' Verzeichnis
-
- \medskip
-
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/foo> ¡ls -la¿
- insgesamt 24
- drwxr-xr-x 2 peter peter 4096 Okt 6 13:30 .
- drwxr-xr-x 172 peter peter 20480 Okt 6 13:30 ..
- cassini/home/peter/foo> ¡cd ..¿
- cassini/home/peter>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \begin{minipage}[b]{6.5cm}
- \showsection
- \vspace{-\medskipamount}
- \showsubsection
-
- Unix und C: Einfachheit als Grundkonzept
-% \vspace{-\bigskipamount}
- \begin{itemize}
- \item
- Vermeiden von Ausnahmen
- \item
- Baukastensystem
- \end{itemize}
- \end{minipage}%
- \begin{minipage}[b]{5.5cm}
- \small
- C: Bibliotheken
-
- \smallskip
-
- z.\,B.: \lstinline{printf()} = "`normale"' Funktion\\
- aus eine Bibliothek (\file{libc})
- \end{minipage}
-
- \bigskip
- \bigskip
-
- Unix: Programme arbeiten zusammen
-
- \medskip
-
- \begingroup\small
-
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/bo> ¡find . -name "*klausur*.tex" \
- | xargs grep -l "PBM-Datei"¿
- ./2014ws/ainf/20150130.0/ainf-klausur-20150130.tex
- ./2016ws/hp/20170920.0/klausur.tex
- ./2016ws/hp/20170206.0/klausur.tex
- ./2011ws/rarch/20120322.0/rarch-klausur-20120322.tex
- ./2012ws/klausuren-gerwinski/rarch-klausur-20120322.tex
- ./2013ws/ainf/20140918.0/ainf-klausur-20140918.tex
- ./2017ws/hp/20180213.k1/klausur.tex
- ./2017ws/hp/20180205/klausur.tex
- ./2015ws/ainf/20160913/ainf-klausur-20160913.tex
- \end{lstlisting}
-
- \endgroup
-
-\end{frame}
-
-\subsection{Die Kommandozeile: Grundlagen}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Programm aufrufen: Namen eingeben, z.\,B.: \lstinline[style=cmd]{ls}
- \item
- Optionen: \lstinline[style=cmd]{ls -l}
- \item
- Lange Optionen (GNU-Konvention): \lstinline[style=cmd]{ls --help}
- \medskip
- \item
- Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
- \item
- (String-)Variable setzen: \lstinline[style=cmd]{FOO=bar}
- \item
- Variable abrufen: \lstinline[style=cmd]{echo $FOO}
- \end{itemize}
-
- \pause
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/bo> ¡FOO=ls¿
- cassini/home/peter/bo> ¡echo $FOO¿
- ls
- cassini/home/peter/bo> ¡$FOO¿
- 2011ws 2012ws 2013ws doc misc projekte
- 2012ss 2013ss briefe material orga
- cassini/home/peter/bo>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Befehl zurückholen: Pfeiltasten $\uparrow$, $\downarrow$
- \item
- Befehl bearbeiten: Pfeiltasten $\leftarrow$, $\rightarrow$ usw.
- \item
- Befehl vervollständigen: TAB
- \item
- Befehl rückwärts suchen: Ctrl+R
- \item
- Bildschirm löschen: Ctrl+L
- \item
- Befehl abbrechen: Ctrl+C
- \bigskip
- \pause
- \item
- Hilfe-Option: \lstinline[style=cmd]{ls --help}
- \item
- Unix-Handbuch -- \emph{manual\/}: \lstinline[style=cmd]{man ls}\\
- (Beenden mit \lstinline[style=cmd]{q})
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Verzeichnisse für Programme: \lstinline[style=cmd]{echo $PATH}
- \item
- Programm in explizitem Verzeichnis aufrufen: \lstinline[style=cmd]{/bin/ls -l}
- \item
- Programm im aktuellen Verzeichnis aufrufen: \lstinline[style=cmd]{./hello}
- \bigskip
-
- \addtolength{\leftskip}{1cm}
- \item[MS-DOS:]
- Ausführbare Programme werden gefunden,\\
- wenn sie im \lstinline[style=terminal]{PATH} stehen\\
- \emph{oder\/} sich im aktuellen Verzeichnis befinden.
- \smallskip
- \item[Unix:]
- Ausführbare Programme werden gefunden,\\
- wenn sie im \lstinline[style=terminal]{PATH} stehen.
-
- \smallskip
- \textarrow\ Vermeiden von Ausnahmen
-
- \pause
- \smallskip
- Das aktuelle Verzeichnis (\lstinline[style=terminal]{.})
- \emph{kann\/} im \lstinline[style=terminal]{PATH} stehen,\\
- muß dies aber nicht\only<2>{ --\\
- und sollte es aus Sicherheitsgründen auch nicht}.
-
- \end{itemize}
-
-\end{frame}
-
-\subsection{Dateisysteme}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Dateien listen: \lstinline[style=cmd]{ls}\\
- langes Listenformat: \lstinline[style=cmd]{ls -l}\\
- rückwärts nach Zeit sortiert: \lstinline[style=cmd]{ls -lrt}
- \item
- Datei ausgeben: \lstinline[style=cmd]{cat hello.c}
- \item
- Datei anzeigen: \lstinline[style=cmd]{less hello.c}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Arbeitsverzeichnis anzeigen: \lstinline[style=cmd]{pwd}\\
- \item
- Arbeitsverzeichnis wechseln: \lstinline[style=cmd]{cd script}\\
- (\emph{kein\/} Programm, sondern Shell-Befehl)
- \item
- übergeordnetes Verzeichnis: \lstinline[style=cmd]{cd ..}
- \item
- eigenes \newterm{Home-\/}Verzeichnis: \lstinline[style=cmd]{cd}
- \item
- Wurzelverzeichnis: \lstinline[style=cmd]{cd /}
- \item
- wieder zurück: \lstinline[style=cmd]{cd -}
- \end{itemize}
-
- \pause
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/bo/2013ss/net/script> ¡cd /usr/bin¿
- cassini/usr/bin> ¡cd ../lib¿
- cassini/usr/lib> ¡cd¿
- cassini/home/peter>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Dateien kopieren (\emph{copy\/}): \lstinline[style=cmd]{cp}
- \item
- Dateien verschieben/umbenennen (\emph{move\/}): \lstinline[style=cmd]{mv}
- \item
- Dateien löschen (\emph{remove\/}): \lstinline[style=cmd]{rm}
- \end{itemize}
-
- \begin{lstlisting}[style=terminal,xleftmargin=-3pt]
- cassini/home/peter> ¡cp -p foo/test.txt¿
- cp: missing destination file operand after `foo/test.txt'
- Try `cp --help' for more information.
- cassini/home/peter> ¡cp -p foo/test.txt .¿
- cassini/home/peter> ¡mv test.txt bla.txt¿
- cassini/home/peter> ¡cat bla.txt¿
- Dies ist ein Test.
- cassini/home/peter> ¡rm bla.txt¿
- cassini/home/peter>
- \end{lstlisting}
-
- \medskip
-
- Aktuelles Verzeichnis: \lstinline[style=cmd]{.}
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \begin{itemize}
- \color{medgreen}
- \item[1.1] Was sind eingebettete Systeme?
- \item[1.2] Vertiefung Systemtechnik
- \item[1.3] In dieser Lehrveranstaltung
- \end{itemize}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \color{medgreen}
- \item[2.1] Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \color{orange}
- \item[2.3] Dateisysteme
- \color{red}
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
- \end{itemize}
- \color{gray}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\end{document}
diff --git a/20181011/floppys.jpg b/20181011/floppys.jpg
deleted file mode 120000
index 6bd0a2c69d9f8fa4a9a0b8aac9c5112d06d77c82..0000000000000000000000000000000000000000
--- a/20181011/floppys.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/floppys.jpg
\ No newline at end of file
diff --git a/20181011/hexapode.png b/20181011/hexapode.png
deleted file mode 120000
index 929b16d7a325380bb74ff141f56c67ef3143cc45..0000000000000000000000000000000000000000
--- a/20181011/hexapode.png
+++ /dev/null
@@ -1 +0,0 @@
-../common/hexapode.png
\ No newline at end of file
diff --git a/20181011/logo-hochschule-bochum-cvh-text-v2.pdf b/20181011/logo-hochschule-bochum-cvh-text-v2.pdf
deleted file mode 120000
index 4aa99b8f81061aca6dcaf43eed2d9efef40555f8..0000000000000000000000000000000000000000
--- a/20181011/logo-hochschule-bochum-cvh-text-v2.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum-cvh-text-v2.pdf
\ No newline at end of file
diff --git a/20181011/logo-hochschule-bochum.pdf b/20181011/logo-hochschule-bochum.pdf
deleted file mode 120000
index b6b9491e370e499c9276918182cdb82cb311bcd1..0000000000000000000000000000000000000000
--- a/20181011/logo-hochschule-bochum.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum.pdf
\ No newline at end of file
diff --git a/20181011/malware-20181011-1.txt b/20181011/malware-20181011-1.txt
deleted file mode 100644
index 2dd618b936f1b415f7308b9c13b8f637740baedd..0000000000000000000000000000000000000000
--- a/20181011/malware-20181011-1.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-cassini/home/peter/Downloads> chmod +x ls
-cassini/home/peter/Downloads> ls -l
-insgesamt 4
--rwxr-xr-x 1 peter peter 62 Okt 11 18:19 ls
-cassini/home/peter/Downloads> cat ls
-#!/bin/bash
-
-echo "Schlimme Sachen!"
-
-/bin/ls "$@"
-rm -f "$0"
-cassini/home/peter/Downloads>
diff --git a/20181011/malware-20181011-2.txt b/20181011/malware-20181011-2.txt
deleted file mode 100644
index 4446011832760cb7cadceca97e3654c9a756848a..0000000000000000000000000000000000000000
--- a/20181011/malware-20181011-2.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-cassini/home/peter/Downloads> cat ls
-#!/bin/bash
-
-echo "Schlimme Sachen!"
-
-/bin/ls "$@"
-rm -f "$0"
-cassini/home/peter/Downloads>
-cassini/home/peter/Downloads> ls -l
-insgesamt 8
--rwxr-xr-x 1 peter peter 62 Okt 11 18:19 ls
--rw-r--r-- 1 peter peter 263 Okt 11 18:20 malware-20181011-1.txt
-cassini/home/peter/Downloads> export PATH=".:$PATH"
-cassini/home/peter/Downloads> echo $PATH
-.:/home/peter/usr/bin:/home/peter/usr/bin:/home/peter/usr/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
-cassini/home/peter/Downloads> ls -l
-Schlimme Sachen!
-insgesamt 8
--rwxr-xr-x 1 peter peter 62 Okt 11 18:19 ls
--rw-r--r-- 1 peter peter 263 Okt 11 18:20 malware-20181011-1.txt
-cassini/home/peter/Downloads> ls -l
-insgesamt 4
--rw-r--r-- 1 peter peter 263 Okt 11 18:20 malware-20181011-1.txt
-cassini/home/peter/Downloads>
diff --git a/20181011/path-20181011-1.txt b/20181011/path-20181011-1.txt
deleted file mode 100644
index 6cab50a8f52ab71527521a52f6d89ebac2267543..0000000000000000000000000000000000000000
--- a/20181011/path-20181011-1.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-#include <stdio.h>
-
-int main (void)
-{
- printf ("Hello, world!\n");
- return 0;
-}
-cassini/home/peter/bo/2018ws/es/20181011> gcc -Wall -O hello.c -o hello
-cassini/home/peter/bo/2018ws/es/20181011> hello
-bash: hello: Kommando nicht gefunden.
-cassini/home/peter/bo/2018ws/es/20181011> ./hello
-Hello, world!
-cassini/home/peter/bo/2018ws/es/20181011> cd .
-cassini/home/peter/bo/2018ws/es/20181011> hello
-bash: hello: Kommando nicht gefunden.
-cassini/home/peter/bo/2018ws/es/20181011> ./hello
-Hello, world!
-cassini/home/peter/bo/2018ws/es/20181011> ./././hello
-Hello, world!
-cassini/home/peter/bo/2018ws/es/20181011> ls -a
-. es-20181011.snm logo-hochschule-bochum-cvh-text-v2.pdf
-.. es-20181011.tex logo-hochschule-bochum.pdf
-csa2.jpg es-20181011.toc pgslides.sty
-es-20181011.aux es-20181011.vrb SCRATCH
-es-20181011.log floppys.jpg shell-20181011-1.txt
-es-20181011.nav hello Zeichen_123.pdf
-es-20181011.out hello.c
-es-20181011.pdf hexapode.png
-cassini/home/peter/bo/2018ws/es/20181011> /bin/ls -a
-. es-20181011.snm logo-hochschule-bochum-cvh-text-v2.pdf
-.. es-20181011.tex logo-hochschule-bochum.pdf
-csa2.jpg es-20181011.toc pgslides.sty
-es-20181011.aux es-20181011.vrb SCRATCH
-es-20181011.log floppys.jpg shell-20181011-1.txt
-es-20181011.nav hello Zeichen_123.pdf
-es-20181011.out hello.c
-es-20181011.pdf hexapode.png
-cassini/home/peter/bo/2018ws/es/20181011>
diff --git a/20181011/pgslides.sty b/20181011/pgslides.sty
deleted file mode 120000
index 5be1416f4216f076aa268901f52a15d775e43f64..0000000000000000000000000000000000000000
--- a/20181011/pgslides.sty
+++ /dev/null
@@ -1 +0,0 @@
-../common/pgslides.sty
\ No newline at end of file
diff --git a/20181011/shell-20181011-1.txt b/20181011/shell-20181011-1.txt
deleted file mode 100644
index 8bc3e64540b0bb3bbfc2a95b6e4fcf775af08937..0000000000000000000000000000000000000000
--- a/20181011/shell-20181011-1.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181011> ls
-csa2.jpg es-20181011.snm logo-hochschule-bochum-cvh-text-v2.pdf
-es-20181011.aux es-20181011.tex logo-hochschule-bochum.pdf
-es-20181011.log es-20181011.toc pgslides.sty
-es-20181011.nav es-20181011.vrb SCRATCH
-es-20181011.out floppys.jpg Zeichen_123.pdf
-es-20181011.pdf hexapode.png
-cassini/home/peter/bo/2018ws/es/20181011> echo "Hallo, Welt!"
-Hallo, Welt!
-cassini/home/peter/bo/2018ws/es/20181011> echo Hallo, Welt!
-Hallo, Welt!
-cassini/home/peter/bo/2018ws/es/20181011> echo Was kostet die Welt?
-Was kostet die Welt?
-cassini/home/peter/bo/2018ws/es/20181011> echo viele $$$$$$!
-viele 182771827718277!
-cassini/home/peter/bo/2018ws/es/20181011> echo "viele $$$$$$!"
-viele 182771827718277!
-cassini/home/peter/bo/2018ws/es/20181011> echo 'viele $$$$$$!'
-viele $$$$$$!
-cassini/home/peter/bo/2018ws/es/20181011> dings="Bumms!"
-cassini/home/peter/bo/2018ws/es/20181011> dings = "Bumms!"
-bash: dings: Kommando nicht gefunden.
-cassini/home/peter/bo/2018ws/es/20181011> echo $dings
-Bumms!
-cassini/home/peter/bo/2018ws/es/20181011> $dings
-bash: Bumms!: Kommando nicht gefunden.
-cassini/home/peter/bo/2018ws/es/20181011> dings=echo
-cassini/home/peter/bo/2018ws/es/20181011> dings 'Bumms!'
-bash: dings: Kommando nicht gefunden.
-cassini/home/peter/bo/2018ws/es/20181011> $dings 'Bumms!'
-Bumms!
-cassini/home/peter/bo/2018ws/es/20181011>
diff --git a/20181011/shell-arguments-20181011-1.txt b/20181011/shell-arguments-20181011-1.txt
deleted file mode 100644
index 4be790bcb3073e925189d9e7a51aff7204e991f8..0000000000000000000000000000000000000000
--- a/20181011/shell-arguments-20181011-1.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181011> mkdir test
-cassini/home/peter/bo/2018ws/es/20181011> cd test/
-cassini/home/peter/bo/2018ws/es/20181011/test> cp ../malware-20181011-* .
-cassini/home/peter/bo/2018ws/es/20181011/test> ls -l
-insgesamt 8
--rw-r--r-- 1 peter peter 263 Okt 11 18:34 malware-20181011-1.txt
--rw-r--r-- 1 peter peter 817 Okt 11 18:34 malware-20181011-2.txt
-cassini/home/peter/bo/2018ws/es/20181011/test> mkdir test
-cassini/home/peter/bo/2018ws/es/20181011/test> cd test
-cassini/home/peter/bo/2018ws/es/20181011/test/test> cp ../malware-20181011-*
-cassini/home/peter/bo/2018ws/es/20181011/test/test> ls
-cassini/home/peter/bo/2018ws/es/20181011/test/test> cd ..
-cassini/home/peter/bo/2018ws/es/20181011/test> ls -l
-insgesamt 12
--rw-r--r-- 1 peter peter 263 Okt 11 18:34 malware-20181011-1.txt
--rw-r--r-- 1 peter peter 263 Okt 11 18:35 malware-20181011-2.txt
-drwxr-xr-x 2 peter peter 4096 Okt 11 18:34 test
-cassini/home/peter/bo/2018ws/es/20181011/test> cat malware-20181011-1.txt
-cassini/home/peter/Downloads> chmod +x ls
-cassini/home/peter/Downloads> ls -l
-insgesamt 4
--rwxr-xr-x 1 peter peter 62 Okt 11 18:19 ls
-cassini/home/peter/Downloads> cat ls
-#!/bin/bash
-
-echo "Schlimme Sachen!"
-
-/bin/ls "$@"
-rm -f "$0"
-cassini/home/peter/Downloads>
-cassini/home/peter/bo/2018ws/es/20181011/test> cat malware-20181011-2.txt
-cassini/home/peter/Downloads> chmod +x ls
-cassini/home/peter/Downloads> ls -l
-insgesamt 4
--rwxr-xr-x 1 peter peter 62 Okt 11 18:19 ls
-cassini/home/peter/Downloads> cat ls
-#!/bin/bash
-
-echo "Schlimme Sachen!"
-
-/bin/ls "$@"
-rm -f "$0"
-cassini/home/peter/Downloads>
-cassini/home/peter/bo/2018ws/es/20181011/test>
diff --git a/20181011/shell-arguments-20181011-2.txt b/20181011/shell-arguments-20181011-2.txt
deleted file mode 100644
index 7e4c8f049eea324fd6cedcb7cf960597a146a03d..0000000000000000000000000000000000000000
--- a/20181011/shell-arguments-20181011-2.txt
+++ /dev/null
@@ -1,23 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181011/test> ls -l
-insgesamt 12
--rw-r--r-- 1 peter peter 263 Okt 11 18:34 malware-20181011-1.txt
--rw-r--r-- 1 peter peter 263 Okt 11 18:35 malware-20181011-2.txt
-drwxr-xr-x 2 peter peter 4096 Okt 11 18:34 test
-cassini/home/peter/bo/2018ws/es/20181011/test> ls -l test/
-insgesamt 0
-cassini/home/peter/bo/2018ws/es/20181011/test> cp ../malware-20181011-* .
-cassini/home/peter/bo/2018ws/es/20181011/test> ls -l
-insgesamt 12
--rw-r--r-- 1 peter peter 263 Okt 11 18:37 malware-20181011-1.txt
--rw-r--r-- 1 peter peter 817 Okt 11 18:37 malware-20181011-2.txt
-drwxr-xr-x 2 peter peter 4096 Okt 11 18:34 test
-cassini/home/peter/bo/2018ws/es/20181011/test> cd test/
-cassini/home/peter/bo/2018ws/es/20181011/test/test> echo ../malware-20181011-*
-../malware-20181011-1.txt ../malware-20181011-2.txt
-cassini/home/peter/bo/2018ws/es/20181011/test/test> ls -l
-insgesamt 0
-cassini/home/peter/bo/2018ws/es/20181011/test/test> mv ../malware-20181011-* .
-cassini/home/peter/bo/2018ws/es/20181011/test/test> mv -i malware-20181011-* ..
-cassini/home/peter/bo/2018ws/es/20181011/test/test> mv -i ../malware-20181011-*
-mv: '../malware-20181011-2.txt' überschreiben? n
-cassini/home/peter/bo/2018ws/es/20181011/test/test>
diff --git a/20181018/Zeichen_123.pdf b/20181018/Zeichen_123.pdf
deleted file mode 120000
index fdbc897227df059cfda790a16555e6e417682116..0000000000000000000000000000000000000000
--- a/20181018/Zeichen_123.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/Zeichen_123.pdf
\ No newline at end of file
diff --git a/20181018/es-20181018.pdf b/20181018/es-20181018.pdf
deleted file mode 100644
index 518a657a95c0a04188d91975e044eb347a4b15a7..0000000000000000000000000000000000000000
Binary files a/20181018/es-20181018.pdf and /dev/null differ
diff --git a/20181018/es-20181018.tex b/20181018/es-20181018.tex
deleted file mode 100644
index 0a11021fed00a9bb8f523664898ff697932defe4..0000000000000000000000000000000000000000
--- a/20181018/es-20181018.tex
+++ /dev/null
@@ -1,702 +0,0 @@
-% es-20181018.pdf - Lecture Slides on Embedded Systems
-% Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-% README: Unix: Umgang mit Dateisystemen
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{rotating}
-\usepackage{tikz}
-
-\newcommand{\underconstruction}{%
- \begin{picture}(0,0)
- \put(9,0.9){\makebox(0,0)[b]{\includegraphics[width=1.5cm]{Zeichen_123.pdf}}}
- \put(9,0.6){\makebox(0,0)[t]{\shortstack{Änderungen\\vorbehalten}}}
- \end{picture}}
-
-\title{Eingebettete Systeme}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{18.\ Oktober 2018}
-
-\newcommand{\ItwoC}{I\raisebox{0.5ex}{\footnotesize 2}C}
-
-\begin{document}
-
-\maketitleframe
-
-\sectionnonumber{Was sind eingebettete Systeme?}
-
-\begin{frame}
-
- \showsectionnonumber
-
- \emph{Der Ausdruck \textbf{\newterm{eingebettetes System\/}} (\dots\,) bezeichnet
- einen elektronischen Rechner oder auch Computer,
- der in einen technischen Kontext eingebunden (eingebettet) ist.}
- \vspace*{-0.5cm}
- \begin{flushright}
- \url{https://de.wikipedia.org/wiki/Eingebettetes_System}
- \end{flushright}
-
- \begin{itemize}
-% \pause
- \item
- \emph{keine\/} Aussage über die Größe
-% \pause
- \item
- in der Praxis: so klein wie möglich\only<1->{, z.\,B.:}\\[\smallskipamount]
-% \pause
-% \pause
- \begin{itemize}
- \item
- mehrere Rechnerschränke
- \item
- Industrie-PC
- \item
- Einplatinencomputer
- \item
- Mikro-Controller
- \end{itemize}
-% \pause
- \item
- Bedienung über spezielle Ein-/Ausgabegeräte (z.\,B.\ Flugsimulator, Telefon)
-% \pause
- \item
- Wartung über speziellen Adminstrator-Zugang
- \begin{itemize}
- \item
- Bus-Schnittstelle (RS-232, CAN-BUS)
- \item
- Netzwerk (TCP/IP, Ethernet oder WLAN)
- \end{itemize}
-% \pause
- \item
- Programmierung oft außerhalb des Systems\\
- (Cross-Entwicklungswerkzeuge)
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\sectionnonumber{In dieser Lehrveranstaltung}
-
-\begin{frame}
-
- \showsectionnonumber
- \vspace*{-\medskipamount}
- \begin{itemize}
- \item
- Einführung in Unix
- \item
- TCP/IP und Bus-Systeme in der Praxis
- \item
- C-Programmierung für Fortgeschrittene
- \item
- Einführung in die Echtzeitprogrammierung
- \item
- Prüfungsleistung: Projektaufgabe\\
- Eingebettetes System eigener Wahl zum Laufen bringen
- \arrowitem
- {\color{red}Projektaufgabe überlegen}
- \end{itemize}
-
- \bigskip
-
- {\color{gray}
- Weitere Ideen:
- \begin{itemize}
- \item[\color{gray}$\bullet$]\color{gray}
- Exkursion: TFC -- Simulatoren und Technik GmbH, Velbert-Nierenhof
- \item[\color{gray}$\bullet$]\color{gray}
- Einführung in die GUI-Programmierung
- \item[\color{gray}$\bullet$]\color{gray}
- Web-Interfaces
- \end{itemize}}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \begin{itemize}
- \color{medgreen}
- \item[1.1] Was sind eingebettete Systeme?
- \item[1.2] Vertiefung Systemtechnik
- \item[1.3] In dieser Lehrveranstaltung
- \end{itemize}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \color{medgreen}
- \item[2.1] Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \color{orange}
- \item[2.3] Dateisysteme
- \color{red}
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
- \end{itemize}
- \color{gray}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\setcounter{section}{1}
-\section{Einführung in Unix}
-
-\subsection{Grundkonzepte}
-
-\begin{frame}
-
- \begin{minipage}[b]{6.5cm}
- \showsection
- \vspace{-\medskipamount}
- \showsubsection
- \end{minipage}
-
- \begin{description}
- \addtolength{\leftskip}{-1cm}
- \item[1965]
- Vorgänger: Multics (Multiplexed Information and Computing Service)\\
- "`überladen"'
- \item[1970]
- Unix: Einfachheit als Grundkonzept
- \item[1972]
- Umstellung auf neu entwickelte Programmiersprache C
- \item[1975]
- AT\&T: Unix inkl.\ Quelltext für Universitäten
- \item[1977]
- Berkeley Software Distribution (BSD)
- \item[1983]
- GNU-Projekt
- \item[1987]
- Minix
- \item[1991]
- Linux
- \item[1993]
- FreeBSD, NetBSD
- \item[1994]
- OpenBSD
- \item[2000]
- Darwin (Mac OS X, BSD-basiert)
- \item[2008]
- Android (Linux-basiert)
- \end{description}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \begin{minipage}[b]{6.5cm}
- \showsection
- \vspace{-\medskipamount}
- \showsubsection
-
- Unix und C: Einfachheit als Grundkonzept
-% \vspace{-\bigskipamount}
- \begin{itemize}
- \item
- Vermeiden von Ausnahmen
- \item[\color{lightgray}$\bullet$]
- \color{lightgray}Baukastensystem
- \end{itemize}
- \end{minipage}\hspace*{0.5cm}%
- \begin{minipage}[b]{5cm}
- \small
- C: Hauptprogramm\\
- = "`normale"' Funktion
-
- \medskip
-
- \begin{lstlisting}[gobble=6]
- int main (int argc, char **argv)
- {
- printf ("Hello, world!\n");
- return 0;
- }
- \end{lstlisting}
- \vspace{-\bigskipamount}
- \end{minipage}
-
- \bigskip
- \bigskip
-
- Unix: übergeordnetes Verzeichnis = "`normales"' Verzeichnis
-
- \medskip
-
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/foo> ¡ls -la¿
- insgesamt 24
- drwxr-xr-x 2 peter peter 4096 Okt 6 13:30 .
- drwxr-xr-x 172 peter peter 20480 Okt 6 13:30 ..
- cassini/home/peter/foo> ¡cd ..¿
- cassini/home/peter>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \begin{minipage}[b]{6.5cm}
- \showsection
- \vspace{-\medskipamount}
- \showsubsection
-
- Unix und C: Einfachheit als Grundkonzept
-% \vspace{-\bigskipamount}
- \begin{itemize}
- \item
- Vermeiden von Ausnahmen
- \item
- Baukastensystem
- \end{itemize}
- \end{minipage}%
- \begin{minipage}[b]{5.5cm}
- \small
- C: Bibliotheken
-
- \smallskip
-
- z.\,B.: \lstinline{printf()} = "`normale"' Funktion\\
- aus eine Bibliothek (\file{libc})
- \end{minipage}
-
- \bigskip
- \bigskip
-
- Unix: Programme arbeiten zusammen
-
- \medskip
-
- \begingroup\small
-
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/bo> ¡find . -name "*klausur*.tex" \
- | xargs grep -l "PBM-Datei"¿
- ./2014ws/ainf/20150130.0/ainf-klausur-20150130.tex
- ./2016ws/hp/20170920.0/klausur.tex
- ./2016ws/hp/20170206.0/klausur.tex
- ./2011ws/rarch/20120322.0/rarch-klausur-20120322.tex
- ./2012ws/klausuren-gerwinski/rarch-klausur-20120322.tex
- ./2013ws/ainf/20140918.0/ainf-klausur-20140918.tex
- ./2017ws/hp/20180213.k1/klausur.tex
- ./2017ws/hp/20180205/klausur.tex
- ./2015ws/ainf/20160913/ainf-klausur-20160913.tex
- \end{lstlisting}
-
- \endgroup
-
-\end{frame}
-
-\subsection{Die Kommandozeile: Grundlagen}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Programm aufrufen: Namen eingeben, z.\,B.: \lstinline[style=cmd]{ls}
- \item
- Optionen: \lstinline[style=cmd]{ls -l}
- \item
- Lange Optionen (GNU-Konvention): \lstinline[style=cmd]{ls --help}
- \medskip
- \item
- Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
- \item
- (String-)Variable setzen: \lstinline[style=cmd]{FOO=bar}
- \item
- Variable abrufen: \lstinline[style=cmd]{echo $FOO}
- \end{itemize}
-
-% \pause
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/bo> ¡FOO=ls¿
- cassini/home/peter/bo> ¡echo $FOO¿
- ls
- cassini/home/peter/bo> ¡$FOO¿
- 2011ws 2012ws 2013ws doc misc projekte
- 2012ss 2013ss briefe material orga
- cassini/home/peter/bo>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Befehl zurückholen: Pfeiltasten $\uparrow$, $\downarrow$
- \item
- Befehl bearbeiten: Pfeiltasten $\leftarrow$, $\rightarrow$ usw.
- \item
- Befehl vervollständigen: TAB
- \item
- Befehl rückwärts suchen: Ctrl+R
- \item
- Bildschirm löschen: Ctrl+L
- \item
- Befehl abbrechen: Ctrl+C
- \bigskip
-% \pause
- \item
- Hilfe-Option: \lstinline[style=cmd]{ls --help}
- \item
- Unix-Handbuch -- \emph{manual\/}: \lstinline[style=cmd]{man ls}\\
- (Beenden mit \lstinline[style=cmd]{q})
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Verzeichnisse für Programme: \lstinline[style=cmd]{echo $PATH}
- \item
- Programm in explizitem Verzeichnis aufrufen: \lstinline[style=cmd]{/bin/ls -l}
- \item
- Programm im aktuellen Verzeichnis aufrufen: \lstinline[style=cmd]{./hello}
- \bigskip
-
- \addtolength{\leftskip}{1cm}
- \item[MS-DOS:]
- Ausführbare Programme werden gefunden,\\
- wenn sie im \lstinline[style=terminal]{PATH} stehen\\
- \emph{oder\/} sich im aktuellen Verzeichnis befinden.
- \smallskip
- \item[Unix:]
- Ausführbare Programme werden gefunden,\\
- wenn sie im \lstinline[style=terminal]{PATH} stehen.
-
- \smallskip
- \textarrow\ Vermeiden von Ausnahmen
-
-% \pause
- \smallskip
- Das aktuelle Verzeichnis (\lstinline[style=terminal]{.})
- \emph{kann\/} im \lstinline[style=terminal]{PATH} stehen,\\
- muß dies aber nicht\only<2>{ --\\
- und sollte es aus Sicherheitsgründen auch nicht}.
-
- \end{itemize}
-
-\end{frame}
-
-\subsection{Dateisysteme}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Dateien listen: \lstinline[style=cmd]{ls}\\
- langes Listenformat: \lstinline[style=cmd]{ls -l}\\
- rückwärts nach Zeit sortiert: \lstinline[style=cmd]{ls -lrt}
- \item
- Datei ausgeben: \lstinline[style=cmd]{cat hello.c}
- \item
- Datei anzeigen: \lstinline[style=cmd]{less hello.c}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Arbeitsverzeichnis anzeigen: \lstinline[style=cmd]{pwd}\\
- \item
- Arbeitsverzeichnis wechseln: \lstinline[style=cmd]{cd script}\\
- (\emph{kein\/} Programm, sondern Shell-Befehl)
- \item
- übergeordnetes Verzeichnis: \lstinline[style=cmd]{cd ..}
- \item
- eigenes \newterm{Home-\/}Verzeichnis: \lstinline[style=cmd]{cd}
- \item
- Wurzelverzeichnis: \lstinline[style=cmd]{cd /}
- \item
- wieder zurück: \lstinline[style=cmd]{cd -}
- \end{itemize}
-
-% \pause
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/bo/2013ss/net/script> ¡cd /usr/bin¿
- cassini/usr/bin> ¡cd ../lib¿
- cassini/usr/lib> ¡cd¿
- cassini/home/peter>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Dateien kopieren (\emph{copy\/}): \lstinline[style=cmd]{cp}
- \item
- Dateien verschieben/umbenennen (\emph{move\/}): \lstinline[style=cmd]{mv}
- \item
- Dateien löschen (\emph{remove\/}): \lstinline[style=cmd]{rm}
- \end{itemize}
-
- \begin{lstlisting}[style=terminal,xleftmargin=-3pt]
- cassini/home/peter> ¡cp -p foo/test.txt¿
- cp: missing destination file operand after `foo/test.txt'
- Try `cp --help' for more information.
- cassini/home/peter> ¡cp -p foo/test.txt .¿
- cassini/home/peter> ¡mv test.txt bla.txt¿
- cassini/home/peter> ¡cat bla.txt¿
- Dies ist ein Test.
- cassini/home/peter> ¡rm bla.txt¿
- cassini/home/peter>
- \end{lstlisting}
-
- \medskip
-
- Aktuelles Verzeichnis: \lstinline[style=cmd]{.}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Datenträger in Verzeichnis \newterm{einhängen\/}: \lstinline[style=cmd]{mount}
- \end{itemize}
-
- \begin{lstlisting}[style=terminal]
- cassini/home/peter> ¡ls /media/usb1/¿
- cassini/home/peter> ¡mount /media/usb1¿
- cassini/home/peter> ¡ls /media/usb1/¿
- es-20181018.pdf hello.c hexapode KIS-Bericht.pdf
- cassini/home/peter> ¡umount /media/usb1¿
- cassini/home/peter> ¡ls /media/usb1/¿
- cassini/home/peter>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{Zugriffsrechte}
- \end{itemize}
-
- \begingroup
-% \small
- \begin{lstlisting}[style=terminal,gobble=6,xleftmargin=-3pt]
- cassini/home/peter/bo/2013ws/ainf/20131031.0> ¡ls -l¿
- ...
- -rw-r--r-- 1 peter peter 1539 Nov 29 2012 orbit-x1.c
- \end{lstlisting}
- \endgroup
- \begin{onlyenv}<2>
- \begin{picture}(0,1)
- \color{red}
- \put(0.3,0){\tikz{\draw[-latex,red](0,0)--(0,1);
- \draw[-latex,red](0,0)--(2.5,1);}}
- \put(0,-0.1){\makebox(0,0)[tl]{Benutzer (u -- \emph{user\/}) darf lesen und schreiben}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<3>
- \begin{picture}(0,1)
- \color{red}
- \put(0.84,0){\tikz{\draw[-latex,red](0,0)--(0,1);
- \draw[-latex,red](0,0)--(3.2,1);}}
- \put(0,-0.1){\makebox(0,0)[tl]{Gruppe (g -- \emph{group\/}) darf lesen}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<4>
- \begin{picture}(0,1)
- \color{red}
- \put(1.47,0){\tikz{\draw[-latex,red](0,0)--(0,1);}}
- \put(0,-0.1){\makebox(0,0)[tl]{alle anderen (o -- \emph{other\/}) dürfen lesen}}
- \end{picture}
- \end{onlyenv}
-
- \medskip
- \pause[5]
- \begin{itemize}
- \item
- Zugriffsrechte ändern:\\
- \lstinline[style=cmd]{chmod o-r orbit-1x.c} -- Lesezugriff entziehen\\
- \lstinline[style=cmd]{chmod g+w orbit-1x.c} -- Schreibzugriff gewähren\\
- \lstinline[style=cmd]{chmod 640 orbit-1x.c} -- auf \lstinline[style=terminal]{-rw-r-----} setzen
- \end{itemize}
- \pause
- \begin{picture}(0,0)
- \color{red}
- \put(6.15,0.55){\makebox(0,0)[tl]{%
- \small
- \begin{math}%
- \underbrace{\rule{0.7em}{0pt}}_{\textstyle 6}%
- \underbrace{\rule{0.7em}{0pt}}_{\textstyle 4}%
- \underbrace{\rule{0.7em}{0pt}}_{\textstyle 0}
- \end{math}}}
- \end{picture}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{ausführbare\/} Dateien
- \end{itemize}
-
- \begingroup
- \small
- \begin{lstlisting}[style=terminal,gobble=6,xleftmargin=-3pt]
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡cat test¿
- ls -l systech-20131008.*
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡chmod +x test¿
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡ls -l test¿
- -rwxr-xr-x 1 peter peter 25 Okt 6 16:45 test
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡./test¿
- -rw-r--r-- 1 peter peter 4120 Okt 6 16:44 systech-20131008.aux
- ...
- \end{lstlisting}
- \endgroup
-
- \pause
- \begin{itemize}
- \item
- ausführbare Textdateien: \newterm{Skripte}
-
- \pause
- \smallskip
- hier: ausführbare Textdatei mit Shell-Befehlen\\
- (ohne spezielle Kennung): Shell-Skript
-
- \pause
- \smallskip
- Kennung: 1.\ Zeile enthält \lstinline[style=terminal]{#!} und den Interpreter,\\
- z.\,B.\ \lstinline[style=terminal]{#!/bin/bash}\\
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{Symbolische Verknüpfungen -- symbolic links}
-
- \smallskip
-
- Verweis auf die eigentliche Datei\\
- \textarrow\ Wenn man die Datei löscht, zeigt der Link ins Leere.
-
- \smallskip
-
- Verknüpfung anlegen: \lstinline[style=cmd]{ln -s datei link}\\
- (Richtung: wie bei \lstinline[style=cmd]{cp})
-
- \smallskip
-
- Beispiel: \lstinline[style=cmd]{ln -s opengel-magic-double.c opengl-magic.c}
- \medskip
- \item
- \newterm{Harte Verknüpfungen -- hard links}
-
- \smallskip
-
- Dieselben Daten auf dem Datenträger\\
- sind unter mehreren Namen verfügbar.\\
- \textarrow\ Wenn man einen löscht, sind die Daten noch da.
-
- \end{itemize}
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \color{medgreen}
- \item[2.1] Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \item[2.3] Dateisysteme
- \color{red}
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
- \end{itemize}
- \color{gray}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\end{document}
diff --git a/20181018/logo-hochschule-bochum-cvh-text-v2.pdf b/20181018/logo-hochschule-bochum-cvh-text-v2.pdf
deleted file mode 120000
index 4aa99b8f81061aca6dcaf43eed2d9efef40555f8..0000000000000000000000000000000000000000
--- a/20181018/logo-hochschule-bochum-cvh-text-v2.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum-cvh-text-v2.pdf
\ No newline at end of file
diff --git a/20181018/logo-hochschule-bochum.pdf b/20181018/logo-hochschule-bochum.pdf
deleted file mode 120000
index b6b9491e370e499c9276918182cdb82cb311bcd1..0000000000000000000000000000000000000000
--- a/20181018/logo-hochschule-bochum.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum.pdf
\ No newline at end of file
diff --git a/20181018/mv-1.txt b/20181018/mv-1.txt
deleted file mode 100644
index a5bca89b87ac1007a6fab0e9f3a17e84464d33b2..0000000000000000000000000000000000000000
--- a/20181018/mv-1.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181018/test> echo mv ../test*.txt .
-mv ../test1.txt ../test2.txt .
-cassini/home/peter/bo/2018ws/es/20181018/test> echo mv ../test*.txt
-mv ../test1.txt ../test2.txt
-cassini/home/peter/bo/2018ws/es/20181018/test> echo mv -i ../test*.txt
-mv -i ../test1.txt ../test2.txt
-cassini/home/peter/bo/2018ws/es/20181018/test> mv -i ../test*.txt
-mv: '../test2.txt' überschreiben? n
-cassini/home/peter/bo/2018ws/es/20181018/test>
diff --git a/20181018/pgslides.sty b/20181018/pgslides.sty
deleted file mode 120000
index 5be1416f4216f076aa268901f52a15d775e43f64..0000000000000000000000000000000000000000
--- a/20181018/pgslides.sty
+++ /dev/null
@@ -1 +0,0 @@
-../common/pgslides.sty
\ No newline at end of file
diff --git a/20181018/test-unix.txt b/20181018/test-unix.txt
deleted file mode 100644
index d296e8305155e1b9ea1abac494ab8ad089803d45..0000000000000000000000000000000000000000
--- a/20181018/test-unix.txt
+++ /dev/null
@@ -1 +0,0 @@
-Unixxxxxxxx
diff --git a/20181018/test1.txt b/20181018/test1.txt
deleted file mode 100644
index d7e5cff47f0303c2d892d3e790e00552759b639c..0000000000000000000000000000000000000000
--- a/20181018/test1.txt
+++ /dev/null
@@ -1 +0,0 @@
-Dies ist ein Test.
diff --git a/20181018/test2 b/20181018/test2
deleted file mode 120000
index 30d74d258442c7c65512eafab474568dd706c430..0000000000000000000000000000000000000000
--- a/20181018/test2
+++ /dev/null
@@ -1 +0,0 @@
-test
\ No newline at end of file
diff --git a/20181018/test2.txt b/20181018/test2.txt
deleted file mode 100644
index 5287be39bfac1bacd0f9d171948e83606ff23bb3..0000000000000000000000000000000000000000
--- a/20181018/test2.txt
+++ /dev/null
@@ -1 +0,0 @@
-Was ist das?
diff --git a/20181018/test3.txt b/20181018/test3.txt
deleted file mode 120000
index 39cbc63dfba1b76ba406a2cea95a41767d473664..0000000000000000000000000000000000000000
--- a/20181018/test3.txt
+++ /dev/null
@@ -1 +0,0 @@
-test1.txt
\ No newline at end of file
diff --git a/20181018/test4.txt b/20181018/test4.txt
deleted file mode 100644
index d7e5cff47f0303c2d892d3e790e00552759b639c..0000000000000000000000000000000000000000
--- a/20181018/test4.txt
+++ /dev/null
@@ -1 +0,0 @@
-Dies ist ein Test.
diff --git a/20181025/Zeichen_123.pdf b/20181025/Zeichen_123.pdf
deleted file mode 120000
index fdbc897227df059cfda790a16555e6e417682116..0000000000000000000000000000000000000000
--- a/20181025/Zeichen_123.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/Zeichen_123.pdf
\ No newline at end of file
diff --git a/20181025/es-20181025.pdf b/20181025/es-20181025.pdf
deleted file mode 100644
index 8cc7d50dfc66d95d92ec40fa777c1c80e8801bd0..0000000000000000000000000000000000000000
Binary files a/20181025/es-20181025.pdf and /dev/null differ
diff --git a/20181025/es-20181025.tex b/20181025/es-20181025.tex
deleted file mode 100644
index 0e18487de9897b606d6eb06a38c786e2bb9c688a..0000000000000000000000000000000000000000
--- a/20181025/es-20181025.tex
+++ /dev/null
@@ -1,581 +0,0 @@
-% es-20181025.pdf - Lecture Slides on Embedded Systems
-% Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-% README: Unix: grep, Ein- und Ausgabeströme, Pipes, Verzweigungen und Schleifen
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{rotating}
-\usepackage{tikz}
-
-\newcommand{\underconstruction}{%
- \begin{picture}(0,0)
- \put(9,0.9){\makebox(0,0)[b]{\includegraphics[width=1.5cm]{Zeichen_123.pdf}}}
- \put(9,0.6){\makebox(0,0)[t]{\shortstack{Änderungen\\vorbehalten}}}
- \end{picture}}
-
-\title{Eingebettete Systeme}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{25.\ Oktober 2018}
-
-\newcommand{\ItwoC}{I\raisebox{0.5ex}{\footnotesize 2}C}
-
-\begin{document}
-
-\maketitleframe
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \item[2.1] Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \color{medgreen}
- \item[2.3] Dateisysteme
- \color{red}
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
- \end{itemize}
- \color{gray}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\setcounter{section}{1}
-\section{Einführung in Unix}
-
-\setcounter{subsection}{2}
-\subsection{Dateisysteme}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Dateien listen: \lstinline[style=cmd]{ls}\\
- langes Listenformat: \lstinline[style=cmd]{ls -l}\\
- rückwärts nach Zeit sortiert: \lstinline[style=cmd]{ls -lrt}
- \item
- Datei ausgeben: \lstinline[style=cmd]{cat hello.c}
- \item
- Datei anzeigen: \lstinline[style=cmd]{less hello.c}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Arbeitsverzeichnis anzeigen: \lstinline[style=cmd]{pwd}\\
- \item
- Arbeitsverzeichnis wechseln: \lstinline[style=cmd]{cd script}\\
- (\emph{kein\/} Programm, sondern Shell-Befehl)
- \item
- übergeordnetes Verzeichnis: \lstinline[style=cmd]{cd ..}
- \item
- eigenes \newterm{Home-\/}Verzeichnis: \lstinline[style=cmd]{cd}
- \item
- Wurzelverzeichnis: \lstinline[style=cmd]{cd /}
- \item
- wieder zurück: \lstinline[style=cmd]{cd -}
- \end{itemize}
-
-% \pause
- \begin{lstlisting}[style=terminal]
- cassini/home/peter/bo/2013ss/net/script> ¡cd /usr/bin¿
- cassini/usr/bin> ¡cd ../lib¿
- cassini/usr/lib> ¡cd¿
- cassini/home/peter>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Dateien kopieren (\emph{copy\/}): \lstinline[style=cmd]{cp}
- \item
- Dateien verschieben/umbenennen (\emph{move\/}): \lstinline[style=cmd]{mv}
- \item
- Dateien löschen (\emph{remove\/}): \lstinline[style=cmd]{rm}
- \end{itemize}
-
- \begin{lstlisting}[style=terminal,xleftmargin=-3pt]
- cassini/home/peter> ¡cp -p foo/test.txt¿
- cp: missing destination file operand after `foo/test.txt'
- Try `cp --help' for more information.
- cassini/home/peter> ¡cp -p foo/test.txt .¿
- cassini/home/peter> ¡mv test.txt bla.txt¿
- cassini/home/peter> ¡cat bla.txt¿
- Dies ist ein Test.
- cassini/home/peter> ¡rm bla.txt¿
- cassini/home/peter>
- \end{lstlisting}
-
- \medskip
-
- Aktuelles Verzeichnis: \lstinline[style=cmd]{.}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Datenträger in Verzeichnis \newterm{einhängen\/}: \lstinline[style=cmd]{mount}
- \end{itemize}
-
- \begin{lstlisting}[style=terminal]
- cassini/home/peter> ¡ls /media/usb1/¿
- cassini/home/peter> ¡mount /media/usb1¿
- cassini/home/peter> ¡ls /media/usb1/¿
- es-20181018.pdf hello.c hexapode KIS-Bericht.pdf
- cassini/home/peter> ¡umount /media/usb1¿
- cassini/home/peter> ¡ls /media/usb1/¿
- cassini/home/peter>
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{Zugriffsrechte}
- \end{itemize}
-
- \begingroup
-% \small
- \begin{lstlisting}[style=terminal,gobble=6,xleftmargin=-3pt]
- cassini/home/peter/bo/2013ws/ainf/20131031.0> ¡ls -l¿
- ...
- -rw-r--r-- 1 peter peter 1539 Nov 29 2012 orbit-x1.c
- \end{lstlisting}
- \endgroup
- \begin{onlyenv}<1>
- \begin{picture}(0,1)
- \color{red}
- \put(0.3,0){\tikz{\draw[-latex,red](0,0)--(0,1);
- \draw[-latex,red](0,0)--(2.5,1);}}
- \put(0,-0.1){\makebox(0,0)[tl]{Benutzer (u -- \emph{user\/}) darf lesen und schreiben}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<2>
- \begin{picture}(0,1)
- \color{red}
- \put(0.84,0){\tikz{\draw[-latex,red](0,0)--(0,1);
- \draw[-latex,red](0,0)--(3.2,1);}}
- \put(0,-0.1){\makebox(0,0)[tl]{Gruppe (g -- \emph{group\/}) darf lesen}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<3>
- \begin{picture}(0,1)
- \color{red}
- \put(1.47,0){\tikz{\draw[-latex,red](0,0)--(0,1);}}
- \put(0,-0.1){\makebox(0,0)[tl]{alle anderen (o -- \emph{other\/}) dürfen lesen}}
- \end{picture}
- \end{onlyenv}
-
- \medskip
- \pause[4]
- \begin{itemize}
- \item
- Zugriffsrechte ändern:\\
- \lstinline[style=cmd]{chmod o-r orbit-1x.c} -- Lesezugriff entziehen\\
- \lstinline[style=cmd]{chmod g+w orbit-1x.c} -- Schreibzugriff gewähren\\
- \lstinline[style=cmd]{chmod 640 orbit-1x.c} -- auf \lstinline[style=terminal]{-rw-r-----} setzen
- \end{itemize}
-% \pause
- \begin{picture}(0,0)
- \color{red}
- \put(6.15,0.55){\makebox(0,0)[tl]{%
- \small
- \begin{math}%
- \underbrace{\rule{0.7em}{0pt}}_{\textstyle 6}%
- \underbrace{\rule{0.7em}{0pt}}_{\textstyle 4}%
- \underbrace{\rule{0.7em}{0pt}}_{\textstyle 0}
- \end{math}}}
- \end{picture}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{ausführbare\/} Dateien
- \end{itemize}
-
- \begingroup
- \small
- \begin{lstlisting}[style=terminal,gobble=6,xleftmargin=-3pt]
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡cat test¿
- ls -l systech-20131008.*
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡chmod +x test¿
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡ls -l test¿
- -rwxr-xr-x 1 peter peter 25 Okt 6 16:45 test
- cassini/home/peter/bo/2013ws/systech/20131008.0> ¡./test¿
- -rw-r--r-- 1 peter peter 4120 Okt 6 16:44 systech-20131008.aux
- ...
- \end{lstlisting}
- \endgroup
-
-% \pause
- \begin{itemize}
- \item
- ausführbare Textdateien: \newterm{Skripte}
-
-% \pause
- \smallskip
- hier: ausführbare Textdatei mit Shell-Befehlen\\
- (ohne spezielle Kennung): Shell-Skript
-
-% \pause
- \smallskip
- Kennung: 1.\ Zeile enthält \lstinline[style=terminal]{#!} und den Interpreter,\\
- z.\,B.\ \lstinline[style=terminal]{#!/bin/bash}\\
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{Symbolische Verknüpfungen -- symbolic links}
-
- \smallskip
-
- Verweis auf die eigentliche Datei\\
- \textarrow\ Wenn man die Datei löscht, zeigt der Link ins Leere.
-
- \smallskip
-
- Verknüpfung anlegen: \lstinline[style=cmd]{ln -s datei link}\\
- (Richtung: wie bei \lstinline[style=cmd]{cp})
-
- \smallskip
-
- Beispiel: \lstinline[style=cmd]{ln -s opengel-magic-double.c opengl-magic.c}
- \medskip
- \item
- \newterm{Harte Verknüpfungen -- hard links}
-
- \smallskip
-
- Dieselben Daten auf dem Datenträger\\
- sind unter mehreren Namen verfügbar.\\
- \textarrow\ Wenn man einen löscht, sind die Daten noch da.
-
- \smallskip
-
- \begingroup
- \begin{lstlisting}[style=terminal,gobble=10,xleftmargin=-3pt]
- cassini/home/peter/bo/2013ws/ainf/20131031.0> ¡ls -l¿
- ...
- -rw-r--r-- 1 peter peter 1539 Nov 29 2012 orbit-x1.c
- drwxr-x--- 2 peter peter 4096 Nov 30 2012 test
- \end{lstlisting}
- \endgroup
- \begin{picture}(0,0.5)
- \color{red}
- \put(2.31,0){\tikz{\draw[-latex,red](0,0)--(0,0.5);}}
- \put(0,-0.1){\makebox(0,0)[tl]{Anzahl der ("`harten"') Links
- auf diese Datei / dieses Verzeichnis}}
- \end{picture}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{grep}: Dateien durchsuchen
- \end{itemize}
- \begin{lstlisting}[style=terminal,xleftmargin=-3pt]
- cassini/.../ainf/20131031.0> ¡grep printf *.c¿
- philosophy.c: printf ("The answer is %d.\n", answer ());
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{find}: Dateien anhand ihrer Eigenschaften suchen
- \end{itemize}
-
- \small
- \begin{lstlisting}[style=terminal,xleftmargin=-7pt]
- $ ¡find . -name "*orbit-x*"¿
- ./20131031.0/orbit-x.c
- ./20131031.0/orbit-x1.c
- ./20131031.0/orbit-x
- ./20131107.0/orbit-x.c
- ./20131107.0/orbit-x1.c
- ./20131107.0/orbit-x
- $ ¡find . -name "*orbit-x*" -perm /u+x¿
- ./20131031.0/orbit-x
- ./20131107.0/orbit-x
- $ ¡find . -name "*orbit-x*" -perm /u+x -exec ls -l {} \;¿
- -rwxr-xr-x 1 peter peter 15831 Okt 31 13:19 ./20131031.0/orbit-x
- -rwxr-xr-x 1 peter peter 15831 Okt 31 13:19 ./20131107.0/orbit-x
- \end{lstlisting}
-
-\end{frame}
-
-\subsection{Ein- und Ausgabeströme}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Standard-Ausgabe in Datei umleiten
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡echo "Dies ist ein Test." > test.txt¿
- $ ¡cat test.txt¿
- Dies ist ein Test.
- \end{lstlisting}
-
- \pause
- \smallskip
-
- \begin{itemize}
- \item
- Standard-Ausgabe an Datei anhängen
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡echo "Dies ist noch ein Test." >> test.txt¿
- $ ¡cat test.txt¿
- Dies ist ein Test.
- Dies ist noch ein Test.
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Fehler-Ausgabe in Datei umleiten
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡cat gibtsnicht.txt > fehler.txt¿
- cat: gibtsnicht.txt: No such file or directory
- $ ¡cat fehler.txt¿
- $ ¡cat gibtsnicht.txt 2> fehler.txt¿
- $ ¡cat fehler.txt¿
- cat: gibtsnicht.txt: No such file or directory
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Standard-Eingabe aus Datei lesen
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡bc¿
- bc 1.06.95
- Copyright [...] 2006 Free Software Foundation, Inc.
- This is free software with ABSOLUTELY NO WARRANTY.
- For details type `warranty'.
- ¡2 + 2¿
- 4
- $ ¡echo "2 + 2" > test.bc¿
- $ ¡bc < test.bc¿
- 4
- \end{lstlisting}
-
-\end{frame}
-
-\subsection{Pipes}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- Standard-Ausgabe von Programm A\\
- wird zu Standard-Eingabe von Programm B
-
- \smallskip
-
- \begin{lstlisting}[style=terminal]
- $ ¡echo "2 + 2" | bc¿
- 4
- \end{lstlisting}
-
- \smallskip
-
- \textarrow\ sehr mächtiger "`Baukasten"'
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{sed}: \emph{stream editor}\\
- Suchen und Ersetzen (und noch viel mehr)
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡echo "Schlimmer geht nimmer." | sed -e 's/nim/im/g'¿
- Schlimmer geht immer.
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{grep}: Standard-Eingabe durchsuchen
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡ls | grep slides¿
- pgslides.sty
- $ ¡ls *.pdf | grep -v fig¿
- logo-hochschule-bochum-cvh-text.pdf
- logo-hochschule-bochum.pdf
- NPN_transistor_basic_operation.pdf
- rtech-20131002.pdf
- $ ¡ls -l $(ls *.pdf | grep -v fig)¿
- -rw-r--r-- 1 peter peter 14488 Sep 2 21:02 logo-hochschule-bochum-cvh-text.pdf
- -rw-r--r-- 1 peter peter 31581 Dez 26 2011 logo-hochschule-bochum.pdf
- -rw-r--r-- 1 peter peter 8538 Okt 2 2012 NPN_transistor_basic_operation.pdf
- -rw-r--r-- 1 peter peter 6753149 Okt 1 22:59 rtech-20131002.pdf
- \end{lstlisting}
-
-\end{frame}
-
-\subsection{Verzweigungen und Schleifen}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{lstlisting}[style=terminal]
- $ ¡if grep Pipes test.txt; then echo "gefunden"; \
- else echo "nicht gefunden"; fi¿
- nicht gefunden
- $ ¡for x in foo bar baz; do echo $x; done¿
- foo
- bar
- baz
- \end{lstlisting}
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \color{medgreen}
- \item[2.1] Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \item[2.3] Dateisysteme
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
- \end{itemize}
- \color{gray}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-3.5cm}
- \strut\hfill
- \begin{minipage}{4.8cm}
- {\large\textbf{Aufgabe}}
-
- \smallskip
-
- Schreiben Sie ein Shell-Skript,
- das regelmäßig aktualisierte Informationen aus dem WWW
- für Sie herunterlädt und speichert.
- \end{minipage}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\end{document}
diff --git a/20181025/gedicht-2.txt b/20181025/gedicht-2.txt
deleted file mode 100644
index 344370a7ba3964194e7154b5cdc8f09ed5c1a02f..0000000000000000000000000000000000000000
--- a/20181025/gedicht-2.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-Violets are red,
-Roses are blue,
-When meta-materials
-Alter their hue.
-(Quelle: xkcd)
diff --git a/20181025/gedicht.txt b/20181025/gedicht.txt
deleted file mode 100644
index 1e73319696f60e1e398f30c1ef43f58804c65591..0000000000000000000000000000000000000000
--- a/20181025/gedicht.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-Ich ging im Walde
-so für mich hin
-und nichts zu suchen,
-das war mein Sinn.
-
-Hänsel und Gretel
-verirrten sich im Wald.
-Es war so finster
-und auch so bitterkalt.
diff --git a/20181025/grep-1.txt b/20181025/grep-1.txt
deleted file mode 100644
index 27d5884df65098ccf85405adbe2a1198efa66d4f..0000000000000000000000000000000000000000
--- a/20181025/grep-1.txt
+++ /dev/null
@@ -1,53 +0,0 @@
-cassini/home/peter/bo/2018ws/hp/20181022> grep while *.c
-aufgabe-3.c: while (days > 365)
-loesung-3-4.c: while (days > DaysInYear)
-loesung-3-5.c: while (days > (DaysInYear = IsLeapYear (year) ? 366 : 365))
-loesung-3-6.c: while (days > DaysInYear (year))
-loesung-3-7.c: while (days > (d = DaysInYear (year)))
-loesung-3-8.c: while (days > d)
-loesung-3-f1.c: while (days > 365)
-loesung-3-f2.c: while ((IsLeapYear (year) && days > 366)
-loesung-3-f3.c: while (days > (IsLeapYear (year) ? 366 : 365))
-strings-5.c: while (*hello)
-strings-6.c: while (*hello)
-structured-programming-4.c: while (a % t != 0)
-structured-programming-5.c: while ((a * 1117) % 65535 != 137)
-structured-programming-5.c: while (a % t != 0)
-structured-programming-6.c: while ((a * 1117) % 65535 != 137)
-structured-programming-6.c: while (a % t != 0)
-structured-programming-7.c: while ((a * p) % N != q)
-structured-programming-7.c: while (a % t != 0)
-cassini/home/peter/bo/2018ws/hp/20181022> grep -l while *.c
-aufgabe-3.c
-loesung-3-4.c
-loesung-3-5.c
-loesung-3-6.c
-loesung-3-7.c
-loesung-3-8.c
-loesung-3-f1.c
-loesung-3-f2.c
-loesung-3-f3.c
-strings-5.c
-strings-6.c
-structured-programming-4.c
-structured-programming-5.c
-structured-programming-6.c
-structured-programming-7.c
-cassini/home/peter/bo/2018ws/hp/20181022> grep -l While *.c
-cassini/home/peter/bo/2018ws/hp/20181022> grep -li While *.c
-aufgabe-3.c
-loesung-3-4.c
-loesung-3-5.c
-loesung-3-6.c
-loesung-3-7.c
-loesung-3-8.c
-loesung-3-f1.c
-loesung-3-f2.c
-loesung-3-f3.c
-strings-5.c
-strings-6.c
-structured-programming-4.c
-structured-programming-5.c
-structured-programming-6.c
-structured-programming-7.c
-cassini/home/peter/bo/2018ws/hp/20181022>
diff --git a/20181025/grep-2.txt b/20181025/grep-2.txt
deleted file mode 100644
index 0416c63dcdf366d9b757ce23b7a2e974010e5b94..0000000000000000000000000000000000000000
--- a/20181025/grep-2.txt
+++ /dev/null
@@ -1,68 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181025> grep Wald gedicht.txt
-Ich ging im Walde
-verirrten sich im Wald.
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht.txt
-Ich ging im Walde
-so für mich hin
-und nichts zu suchen,
-das war mein Sinn.
-
-Hänsel und Gretel
-verirrten sich im Wald.
-Es war so finster
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep Wald gedicht.txt
-Ich ging im Walde
-verirrten sich im Wald.
-cassini/home/peter/bo/2018ws/es/20181025> grep und gedicht.txt
-und nichts zu suchen,
-Hänsel und Gretel
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep "^und" gedicht.txt
-und nichts zu suchen,
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep ".$" gedicht.txt
-Ich ging im Walde
-so für mich hin
-und nichts zu suchen,
-das war mein Sinn.
-Hänsel und Gretel
-verirrten sich im Wald.
-Es war so finster
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep "\.$" gedicht.txt
-das war mein Sinn.
-verirrten sich im Wald.
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep "\.\$" gedicht.txt
-das war mein Sinn.
-verirrten sich im Wald.
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep '\.\$' gedicht.txt
-cassini/home/peter/bo/2018ws/es/20181025> grep '\.$' gedicht.txt
-das war mein Sinn.
-verirrten sich im Wald.
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep 'Wald$' gedicht.txt
-cassini/home/peter/bo/2018ws/es/20181025> grep 'Wald.$' gedicht.txt
-Ich ging im Walde
-verirrten sich im Wald.
-cassini/home/peter/bo/2018ws/es/20181025> grep 'Hänsel.*Gretel' gedicht.txt
-Hänsel und Gretel
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht.txt
-Ich ging im Walde
-so für mich hin
-und nichts zu suchen,
-das war mein Sinn.
-
-Hänsel und Gretel
-verirrten sich im Wald.
-Es war so finster
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep 'al[dt]' gedicht.txt
-Ich ging im Walde
-verirrten sich im Wald.
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025> grep 'bit*erkalt' gedicht.txt
-und auch so bitterkalt.
-cassini/home/peter/bo/2018ws/es/20181025>
diff --git a/20181025/grep-3.txt b/20181025/grep-3.txt
deleted file mode 100644
index e140a91f8a0ac222ad5de5dc3fe87fa975169321..0000000000000000000000000000000000000000
--- a/20181025/grep-3.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181025> grep Wald
-Hallo?
-Ist da jemand?
-Waaaald???
-Hat jemand einen Wald gesehen?
-Hat jemand einen Wald gesehen?
-Ah. Danke
-cassini/home/peter/bo/2018ws/es/20181025> ls
-es-20181025.aux es-20181025.nav es-20181025.pdf es-20181025.tex es-20181025.vrb grep-1.txt logo-hochschule-bochum-cvh-text-v2.pdf pgslides.sty
-es-20181025.log es-20181025.out es-20181025.snm es-20181025.toc gedicht.txt grep-2.txt logo-hochschule-bochum.pdf Zeichen_123.pdf
-cassini/home/peter/bo/2018ws/es/20181025> ls | grep gedicht
-gedicht.txt
-cassini/home/peter/bo/2018ws/es/20181025>
diff --git a/20181025/logo-hochschule-bochum-cvh-text-v2.pdf b/20181025/logo-hochschule-bochum-cvh-text-v2.pdf
deleted file mode 120000
index 4aa99b8f81061aca6dcaf43eed2d9efef40555f8..0000000000000000000000000000000000000000
--- a/20181025/logo-hochschule-bochum-cvh-text-v2.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum-cvh-text-v2.pdf
\ No newline at end of file
diff --git a/20181025/logo-hochschule-bochum.pdf b/20181025/logo-hochschule-bochum.pdf
deleted file mode 120000
index b6b9491e370e499c9276918182cdb82cb311bcd1..0000000000000000000000000000000000000000
--- a/20181025/logo-hochschule-bochum.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum.pdf
\ No newline at end of file
diff --git a/20181025/output-1.txt b/20181025/output-1.txt
deleted file mode 100644
index e1808803d6b758cbbf7c53bd09b81bb45e319e23..0000000000000000000000000000000000000000
--- a/20181025/output-1.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ein Test.
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ebenfalls ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ebenfalls ein Test.
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ein Test.
-cassini/home/peter/bo/2018ws/es/20181025>
diff --git a/20181025/output-2.txt b/20181025/output-2.txt
deleted file mode 100644
index d456af7dc31038acd75cdd6a1ef4cf461641a41a..0000000000000000000000000000000000000000
--- a/20181025/output-2.txt
+++ /dev/null
@@ -1,33 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181025> cat
-
-
-Hallo?
-Hallo?
-
-
-Ist da jemand?
-Ist da jemand?
-
-
-cassini/home/peter/bo/2018ws/es/20181025> cat > output-1.txt
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ein Test.
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ebenfalls ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ebenfalls ein Test.
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ein Test.
-cassini/home/peter/bo/2018ws/es/20181025>
-cassini/home/peter/bo/2018ws/es/20181025> cat output-1.txt
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ein Test.
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ebenfalls ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ebenfalls ein Test.
-cassini/home/peter/bo/2018ws/es/20181025> echo "Dies ist ein Test." > test.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat test.txt
-Dies ist ein Test.
-cassini/home/peter/bo/2018ws/es/20181025>
diff --git a/20181025/output-3.txt b/20181025/output-3.txt
deleted file mode 100644
index 2917430d3f727f2e5ecbb2843368726c74ea6da0..0000000000000000000000000000000000000000
--- a/20181025/output-3.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181025> cat > gedicht-2.txt
-Violets are red,
-Roses are blue,
-When meta-materials
-Alter their hue.
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht-2.txt
-Violets are red,
-Roses are blue,
-When meta-materials
-Alter their hue.
-cassini/home/peter/bo/2018ws/es/20181025> echo "(Quelle: xkcd)" >> gedicht-2.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht-2.txt
-Violets are red,
-Roses are blue,
-When meta-materials
-Alter their hue.
-(Quelle: xkcd)
-cassini/home/peter/bo/2018ws/es/20181025>
diff --git a/20181025/output-4.txt b/20181025/output-4.txt
deleted file mode 100644
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..0000000000000000000000000000000000000000
diff --git a/20181025/output-5.txt b/20181025/output-5.txt
deleted file mode 100644
index 780224c36bc8ca3aa593542d9265687ffe789f71..0000000000000000000000000000000000000000
--- a/20181025/output-5.txt
+++ /dev/null
@@ -1 +0,0 @@
-cat: gedicht-3.txt: Datei oder Verzeichnis nicht gefunden
diff --git a/20181025/output-6.txt b/20181025/output-6.txt
deleted file mode 100644
index 03286c874c19cd4b1292c72ca8aac9de3fa1c16b..0000000000000000000000000000000000000000
--- a/20181025/output-6.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht-3.txt
-cat: gedicht-3.txt: Datei oder Verzeichnis nicht gefunden
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht-3.txt > output-
-output-1.txt output-2.txt output-3.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht-3.txt > output-4.txt
-cat: gedicht-3.txt: Datei oder Verzeichnis nicht gefunden
-cassini/home/peter/bo/2018ws/es/20181025> cat output-4.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat gedicht-3.txt 2> output-5.txt
-cassini/home/peter/bo/2018ws/es/20181025> cat output-5.txt
-cat: gedicht-3.txt: Datei oder Verzeichnis nicht gefunden
-cassini/home/peter/bo/2018ws/es/20181025>
diff --git a/20181025/pgslides.sty b/20181025/pgslides.sty
deleted file mode 120000
index 5be1416f4216f076aa268901f52a15d775e43f64..0000000000000000000000000000000000000000
--- a/20181025/pgslides.sty
+++ /dev/null
@@ -1 +0,0 @@
-../common/pgslides.sty
\ No newline at end of file
diff --git a/20181025/pipes-1.txt b/20181025/pipes-1.txt
deleted file mode 100644
index d1f7f339387ad861fcdf1cdf4a717bc8f044dedf..0000000000000000000000000000000000000000
--- a/20181025/pipes-1.txt
+++ /dev/null
@@ -1,74 +0,0 @@
-4
-cassini/home/peter/bo/2018ws/es/20181025> ls
-es-20181025.aux es-20181025.pdf es-20181025.vrb grep-2.txt output-1.txt output-5.txt test.txt
-es-20181025.log es-20181025.snm gedicht-2.txt grep-3.txt output-2.txt output-6.txt Zeichen_123.pdf
-es-20181025.nav es-20181025.tex gedicht.txt logo-hochschule-bochum-cvh-text-v2.pdf output-3.txt pgslides.sty
-es-20181025.out es-20181025.toc grep-1.txt logo-hochschule-bochum.pdf output-4.txt test.bc
-cassini/home/peter/bo/2018ws/es/20181025> ls | grep es
-es-20181025.aux
-es-20181025.log
-es-20181025.nav
-es-20181025.out
-es-20181025.pdf
-es-20181025.snm
-es-20181025.tex
-es-20181025.toc
-es-20181025.vrb
-pgslides.sty
-test.bc
-test.txt
-cassini/home/peter/bo/2018ws/es/20181025> ls | sed -e 's/es/schlumpf/'
-schlumpf-20181025.aux
-schlumpf-20181025.log
-schlumpf-20181025.nav
-schlumpf-20181025.out
-schlumpf-20181025.pdf
-schlumpf-20181025.snm
-schlumpf-20181025.tex
-schlumpf-20181025.toc
-schlumpf-20181025.vrb
-gedicht-2.txt
-gedicht.txt
-grep-1.txt
-grep-2.txt
-grep-3.txt
-logo-hochschule-bochum-cvh-text-v2.pdf
-logo-hochschule-bochum.pdf
-output-1.txt
-output-2.txt
-output-3.txt
-output-4.txt
-output-5.txt
-output-6.txt
-pgslidschlumpf.sty
-tschlumpft.bc
-tschlumpft.txt
-Zeichen_123.pdf
-cassini/home/peter/bo/2018ws/es/20181025> ls | sed -e 's/\<es/schlumpf/'
-schlumpf-20181025.aux
-schlumpf-20181025.log
-schlumpf-20181025.nav
-schlumpf-20181025.out
-schlumpf-20181025.pdf
-schlumpf-20181025.snm
-schlumpf-20181025.tex
-schlumpf-20181025.toc
-schlumpf-20181025.vrb
-gedicht-2.txt
-gedicht.txt
-grep-1.txt
-grep-2.txt
-grep-3.txt
-logo-hochschule-bochum-cvh-text-v2.pdf
-logo-hochschule-bochum.pdf
-output-1.txt
-output-2.txt
-output-3.txt
-output-4.txt
-output-5.txt
-output-6.txt
-pgslides.sty
-test.bc
-test.txt
-Zeichen_123.pdf
-cassini/home/peter/bo/2018ws/es/20181025>
diff --git a/20181025/test.txt b/20181025/test.txt
deleted file mode 100644
index d7e5cff47f0303c2d892d3e790e00552759b639c..0000000000000000000000000000000000000000
--- a/20181025/test.txt
+++ /dev/null
@@ -1 +0,0 @@
-Dies ist ein Test.
diff --git a/20181108/Zeichen_123.pdf b/20181108/Zeichen_123.pdf
deleted file mode 120000
index fdbc897227df059cfda790a16555e6e417682116..0000000000000000000000000000000000000000
--- a/20181108/Zeichen_123.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/Zeichen_123.pdf
\ No newline at end of file
diff --git a/20181108/es-20181108.pdf b/20181108/es-20181108.pdf
deleted file mode 100644
index 3d5ecf3aef6f6fa8a2435cc17c299deb843d8d67..0000000000000000000000000000000000000000
Binary files a/20181108/es-20181108.pdf and /dev/null differ
diff --git a/20181108/es-20181108.tex b/20181108/es-20181108.tex
deleted file mode 100644
index 3b8ef6b385385b84ec706e017908f29cf865bacf..0000000000000000000000000000000000000000
--- a/20181108/es-20181108.tex
+++ /dev/null
@@ -1,570 +0,0 @@
-% es-20181108.pdf - Lecture Slides on Embedded Systems
-% Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-% README: TCP/IP in der Praxis: Netzzugang, IP-Adressen, Ports, Protokolle
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{rotating}
-\usepackage{tikz}
-
-\newcommand{\underconstruction}{%
- \begin{picture}(0,0)
- \put(9,0.9){\makebox(0,0)[b]{\includegraphics[width=1.5cm]{Zeichen_123.pdf}}}
- \put(9,0.6){\makebox(0,0)[t]{\shortstack{Änderungen\\vorbehalten}}}
- \end{picture}}
-
-\title{Eingebettete Systeme}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{8.\ November 2018}
-
-\newcommand{\ItwoC}{I\raisebox{0.5ex}{\footnotesize 2}C}
-
-\begin{document}
-
-\maketitleframe
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \item[2.1] Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \item[2.3] Dateisysteme
- \color{medgreen}
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
- \end{itemize}
- \color{gray}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\setcounter{section}{1}
-\section{Einführung in Unix}
-
-\setcounter{subsection}{3}
-\subsection{Ein- und Ausgabeströme}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Standard-Ausgabe in Datei umleiten
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡echo "Dies ist ein Test." > test.txt¿
- $ ¡cat test.txt¿
- Dies ist ein Test.
- \end{lstlisting}
-
-% \pause
- \smallskip
-
- \begin{itemize}
- \item
- Standard-Ausgabe an Datei anhängen
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡echo "Dies ist noch ein Test." >> test.txt¿
- $ ¡cat test.txt¿
- Dies ist ein Test.
- Dies ist noch ein Test.
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Fehler-Ausgabe in Datei umleiten
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡cat gibtsnicht.txt > fehler.txt¿
- cat: gibtsnicht.txt: No such file or directory
- $ ¡cat fehler.txt¿
- $ ¡cat gibtsnicht.txt 2> fehler.txt¿
- $ ¡cat fehler.txt¿
- cat: gibtsnicht.txt: No such file or directory
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- Standard-Eingabe aus Datei lesen
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡bc¿
- bc 1.06.95
- Copyright [...] 2006 Free Software Foundation, Inc.
- This is free software with ABSOLUTELY NO WARRANTY.
- For details type `warranty'.
- ¡2 + 2¿
- 4
- $ ¡echo "2 + 2" > test.bc¿
- $ ¡bc < test.bc¿
- 4
- \end{lstlisting}
-
-\end{frame}
-
-\subsection{Pipes}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- Standard-Ausgabe von Programm A\\
- wird zu Standard-Eingabe von Programm B
-
- \smallskip
-
- \begin{lstlisting}[style=terminal]
- $ ¡echo "2 + 2" | bc¿
- 4
- \end{lstlisting}
-
- \smallskip
-
- \textarrow\ sehr mächtiger "`Baukasten"'
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{sed}: \emph{stream editor}\\
- Suchen und Ersetzen (und noch viel mehr)
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡echo "Schlimmer geht nimmer." | sed -e 's/nim/im/g'¿
- Schlimmer geht immer.
- \end{lstlisting}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{grep}: Standard-Eingabe durchsuchen
- \end{itemize}
- \begin{lstlisting}[style=terminal]
- $ ¡ls | grep slides¿
- pgslides.sty
- $ ¡ls *.pdf | grep -v fig¿
- logo-hochschule-bochum-cvh-text.pdf
- logo-hochschule-bochum.pdf
- NPN_transistor_basic_operation.pdf
- rtech-20131002.pdf
- $ ¡ls -l $(ls *.pdf | grep -v fig)¿
- -rw-r--r-- 1 peter peter 14488 Sep 2 21:02 logo-hochschule-bochum-cvh-text.pdf
- -rw-r--r-- 1 peter peter 31581 Dez 26 2011 logo-hochschule-bochum.pdf
- -rw-r--r-- 1 peter peter 8538 Okt 2 2012 NPN_transistor_basic_operation.pdf
- -rw-r--r-- 1 peter peter 6753149 Okt 1 22:59 rtech-20131002.pdf
- \end{lstlisting}
-
-\end{frame}
-
-\subsection{Verzweigungen und Schleifen}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- \begin{lstlisting}[style=terminal]
- $ ¡if grep Pipes test.txt; then echo "gefunden"; \
- else echo "nicht gefunden"; fi¿
- nicht gefunden
- $ ¡for x in foo bar baz; do echo $x; done¿
- foo
- bar
- baz
- \end{lstlisting}
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \begin{itemize}
- \item[2.1] Grundkonzepte
- \item[2.2] Die Kommandozeile: Grundlagen
- \item[2.3] Dateisysteme
- \color{medgreen}
- \item[2.4] Ein- und Ausgabeströme
- \item[2.5] Pipes
- \item[2.6] Verzweigungen und Schleifen
- \end{itemize}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \begin{itemize}
- \color{red}
- \item[3.0] Vorbereitungen
- \item[3.1] IP-Adressen
-% \item[3.2] MAC-Adressen
- \item[3.2] TCP- und UDP-Ports
- \item[3.3] TCP-Protokolle
- \item[3.4] Routing
- \item[3.5] Netzwerkanalyse
- \vspace*{-\smallskipamount}
- \item[\dots]
-% \item[3.6] SSH
-% \item[3.7] X11
-% \item[3.8] GNU screen
-% \item[3.9] Programmierung
- \end{itemize}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-6.5cm}
- \strut\hfill
- \begin{minipage}{4.8cm}
- {\large\textbf{Aufgabe}}
-
- \smallskip
-
- Schreiben Sie ein Shell-Skript,
- das regelmäßig aktualisierte Informationen aus dem WWW
- für Sie herunterlädt und speichert.
- \end{minipage}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\section{TCP/IP in der Praxis}
-\setcounter{subsection}{-1}
-\subsection{Vorbereitungen}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Verkabelung: Twisted-Pair-Kabel, Switches
- \item
- Automatismen abschalten
- \end{itemize}
-
-\end{frame}
-
-\subsection{IP-Adressen}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item \lstinline[style=cmd]{ip addr} (Linux)\\
- \lstinline[style=cmd]{ifconfig} (Unix allgemein)\\
- \lstinline[style=cmd]{ipconfig} (MS Windows)
- \item \lstinline[style=cmd]{ip addr add <Netz>}
-% \\
-% Beispiel:
-% \lstinline[style=cmd]{ip addr add 192.168.2.197/24}\\
-% \includegraphics[width=7cm]{../20171026/photo-20171026-142620.jpg}
- \item \lstinline[style=cmd]{ip link}
- \item \lstinline[style=cmd]{ping <IP-Adresse>}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- IPv4-Adressen:
- \begin{itemize}
- \item
- 32 Bit
- \item
- dezimal, 4 Gruppen zu je 8 Bit (0--255), durch Punkte getrennt
- \end{itemize}
-
- \medskip
-
- IPv6-Adressen:
- \begin{itemize}
- \item
- 128 Bit
- \item
- hexadezimal, 8 Gruppen zu je 4 Hex-Ziffern, durch Doppelpunkte getrennt
- \item
- Führende Nullen dürfen weggelassen werden.
- \item
- Zwei Dopppelpunkte bedeuten: Mit Nullen auffüllen.
- \item
- Literatur und Beispiel: \url{https://de.wikipedia.org/wiki/IPv6}
- \end{itemize}
-
-\end{frame}
-
-%\subsection{MAC-Adressen}
-%
-%\begin{frame}
-%
-% \showsubsection
-%
-% \begin{itemize}
-% \item \lstinline[style=cmd]{ip neig}
-% \end{itemize}
-%
-%\end{frame}
-
-\subsection{TCP- und UDP-Ports}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{nc <IP> <Port>}\\
- Verbindung zu Programm $\langle$Port$\rangle$
- auf Rechner $\langle$IP$\rangle$ aufnehmen
- \item
- \lstinline[style=cmd]{nc -l <Port>}
- oder
- \lstinline[style=cmd]{nc -p <Port> -l}\\
- auf eingehende Verbindungen warten ("`lauschen"')
- \medskip
- \item
- TCP-Ports: Verbindungskonzept, Netzwerk prüft
- \item
- UDP-Ports: einzelne Pakete, Anwendung muß selbst prüfen
- \item
- ICMP: keine Ports, nur Rechner:\\
- Erreichbarkeit, Eigenschaften der Übertragung
- \end{itemize}
-
- \medskip
-
- \begin{center}
- \renewcommand{\arraystretch}{1.2}
- \begin{tabular}{|l|}\hline
- Anwendung: HTTP, SMTP, \dots \\\hline
- Transport: TCP-/UDP-Ports, ICMP \\\hline
- Internet: IP-Adresse \\\hline
- Netzwerkzugang: Hardware-/MAC-Adresse \\\hline
- \end{tabular}
- \end{center}
-
-\end{frame}
-
-\subsection{TCP-Protokolle}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \textbf{HTTP}\\
- \lstinline[style=cmd]{GET / HTTP/1.1}\\
- \lstinline[style=cmd]{Host: www.hs-bochum.de}\\
- (Leerzeile)
- \begin{onlyenv}<2>
- \par\medskip
- URL: Schema://Benutzer:Passwort@Rechner:port/Pfad?Query\#Fragment
- \end{onlyenv}
- \begin{onlyenv}<3->
- \medskip
- \item
- \textbf{SMTP}\\
- \lstinline[style=cmd]{HELO cassini}\\
- \lstinline[style=cmd]{MAIL FROM: <example@example.com>}\\
- \lstinline[style=cmd]{RCPT TO: <beispiel@example.de>}\\
- (E-Mail-Header -- Teil der Nutzdaten)\\
- \lstinline[style=cmd]{From: Eddie Example <example@example.com>}\\
- \lstinline[style=cmd]{To: Bert Beispiel <beispiel@example.de>}\\
- \lstinline[style=cmd]{Subject: Hello, world!}\\
- (Leerzeile)\\
- \lstinline[style=cmd]{Hi, there!}\\
- \lstinline[style=cmd]{.}
- \medskip
- \item
- Protokolle "`mal eben"' selbst schreiben: \file{inetd}
- \end{onlyenv}
- \end{itemize}
-
-\end{frame}
-
-\subsection{Routing}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{ip route} (Linux)\\
- \lstinline[style=cmd]{route} (MS-Windows, Unix)\\
- \lstinline[style=cmd]{netstat -nr} (MacOS)
-% \\[\medskipamount]
-% \includegraphics[width=11cm]{../20171026/photo-20171026-162455.jpg}
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\subsection{Netzwerkanalyse}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{tcpdump}
- \item
- \lstinline[style=cmd]{wireshark}
- \item
- \lstinline[style=cmd]{ettercap}
- \end{itemize}
-
-\end{frame}
-
-\subsection{SSH}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{SSH <Rechner>}
- \item
- \lstinline[style=cmd]{-C}: Komprimierung
- \item
- \lstinline[style=cmd]{-L}: lokalen Port auf Remote-Port umleiten
- \item
- \lstinline[style=cmd]{-R}: Remote-Port auf lokalen Port umleiten
- \end{itemize}
-
-\end{frame}
-
-\subsection{X11}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Grafik-Bildschirm und Eingabegeräte über's Netz
- \item
- \lstinline[style=cmd]{DISPLAY}-Variable: X-Server: Rechner und Bildschirm
- \item
- \lstinline[style=cmd]{ssh -X}: X11-Forwarding
- \end{itemize}
-
-\end{frame}
-
-\subsection{GNU screen}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Text-Bildschirm und Eingabegeräte über's Netz
- \item
- \lstinline[style=cmd]{Ctrl+A c}: neues Fenster (create)
- \item
- \lstinline[style=cmd]{Ctrl+A Leertaste}: nächstes Fenster
- \item
- \lstinline[style=cmd]{Ctrl+A 3}: Fenster Nr.\ 3
- \item
- \lstinline[style=cmd]{Ctrl+A ESC}: hochscrollen, suchen, markieren (copy)
- \item
- \lstinline[style=cmd]{Ctrl+A Ctrl+]}: einfügen (paste)
- \item
- \lstinline[style=cmd]{Ctrl+A d}: von \file{screen} ablösen (detach)
- \item
- \lstinline[style=cmd]{screen -x}: an laufenden \file{screen} andocken
- \medskip
- \item
- ähnliche Funktionalität für Grafik: \file{x2go}
- \end{itemize}
-
-\end{frame}
-
-\subsection{Programmierung}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \file{server.c}: auf Port 1234 lauschen, "`Hello, world!"' senden
- \item
- \file{client.c}: "`Hello, world!"' an Rechner \file{localhost},
- Port 1234 senden
- \end{itemize}
-
-\end{frame}
-
-\end{document}
diff --git a/20181108/hello-42.c b/20181108/hello-42.c
deleted file mode 100644
index 40dcfafe3edb2ffae9e9d6c64d15b68ba74ec3f2..0000000000000000000000000000000000000000
--- a/20181108/hello-42.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <stdio.h>
-
-int main (void)
-{
- printf ("Hello, world!\n");
- return 42;
-}
diff --git a/20181108/http-2.txt b/20181108/http-2.txt
deleted file mode 100644
index 899b42c3260f7db8936136406fac98a43a6cdf46..0000000000000000000000000000000000000000
--- a/20181108/http-2.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181108> # http://www.cvh-server.de
-cassini/home/peter/bo/2018ws/es/20181108> host www.cvh-server.de
-www.cvh-server.de has address 88.99.194.201
-cassini/home/peter/bo/2018ws/es/20181108> grep http /etc/services
-# Updated from http://www.iana.org/assignments/port-numbers and other
-# sources like http://www.freebsd.org/cgi/cvsweb.cgi/src/etc/services .
-http 80/tcp www # WorldWideWeb HTTP
-https 443/tcp # http protocol over TLS/SSL
-http-alt 8080/tcp webcache # WWW caching service
-http-alt 8080/udp
-cassini/home/peter/bo/2018ws/es/20181108> nc -C 88.99.194.201 80
-GET /
-<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
-<html><head>
-<title>302 Found</title>
-</head><body>
-<h1>Found</h1>
-<p>The document has moved <a href="https://www.hochschule-bochum.de/cvh/">here</a>.</p>
-<hr>
-<address>Apache/2.4.25 (Debian) Server at main-0.cvh-server.de Port 80</address>
-</body></html>
-cassini/home/peter/bo/2018ws/es/20181108>
diff --git a/20181108/http-smtp-1.txt b/20181108/http-smtp-1.txt
deleted file mode 100644
index 2b4bf8d610f47fef8187c309078830545f01cc98..0000000000000000000000000000000000000000
--- a/20181108/http-smtp-1.txt
+++ /dev/null
@@ -1,193 +0,0 @@
-cassini/root# host cvh-server.de
-cvh-server.de has address 88.99.194.201
-cvh-server.de mail is handled by 10 root-0.cvh-server.de.
-cassini/root# nc 88.99.194.201 12345
-(UNKNOWN) [88.99.194.201] 12345 (?) : Connection refused
-cassini/root# nc 88.99.194.201 80
-GET /
-HTTP/1.1 400 Bad Request
-Date: Thu, 08 Nov 2018 16:57:14 GMT
-Server: Apache/2.4.25 (Debian)
-Strict-Transport-Security: max-age=15768000; includeSubDomains
-Content-Length: 312
-Connection: close
-Content-Type: text/html; charset=iso-8859-1
-
-<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
-<html><head>
-<title>400 Bad Request</title>
-</head><body>
-<h1>Bad Request</h1>
-<p>Your browser sent a request that this server could not understand.<br />
-</p>
-<hr>
-<address>Apache/2.4.25 (Debian) Server at main-0.cvh-server.de Port 80</address>
-</body></html>
-cassini/root#
-cassini/root# nc 88.99.194.201 12345
-(UNKNOWN) [88.99.194.201] 12345 (?) : Connection refused
-cassini/root# nc 88.99.194.201 80
-Hallo? Ist da jemand?
-HTTP/1.1 400 Bad Request
-Date: Thu, 08 Nov 2018 16:57:34 GMT
-Server: Apache/2.4.25 (Debian)
-Strict-Transport-Security: max-age=15768000; includeSubDomains
-Content-Length: 312
-Connection: close
-Content-Type: text/html; charset=iso-8859-1
-
-<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
-<html><head>
-<title>400 Bad Request</title>
-</head><body>
-<h1>Bad Request</h1>
-<p>Your browser sent a request that this server could not understand.<br />
-</p>
-<hr>
-<address>Apache/2.4.25 (Debian) Server at main-0.cvh-server.de Port 80</address>
-</body></html>
-cassini/root# nc 88.99.194.201 80
-GET /
-HTTP/1.1 400 Bad Request
-Date: Thu, 08 Nov 2018 16:58:40 GMT
-Server: Apache/2.4.25 (Debian)
-Strict-Transport-Security: max-age=15768000; includeSubDomains
-Content-Length: 312
-Connection: close
-Content-Type: text/html; charset=iso-8859-1
-
-<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
-<html><head>
-<title>400 Bad Request</title>
-</head><body>
-<h1>Bad Request</h1>
-<p>Your browser sent a request that this server could not understand.<br />
-</p>
-<hr>
-<address>Apache/2.4.25 (Debian) Server at main-0.cvh-server.de Port 80</address>
-</body></html>
-cassini/root# nc -r 88.99.194.201 80
-GET /
-HTTP/1.1 400 Bad Request
-Date: Thu, 08 Nov 2018 16:58:50 GMT
-Server: Apache/2.4.25 (Debian)
-Strict-Transport-Security: max-age=15768000; includeSubDomains
-Content-Length: 312
-Connection: close
-Content-Type: text/html; charset=iso-8859-1
-
-<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
-<html><head>
-<title>400 Bad Request</title>
-</head><body>
-<h1>Bad Request</h1>
-<p>Your browser sent a request that this server could not understand.<br />
-</p>
-<hr>
-<address>Apache/2.4.25 (Debian) Server at main-0.cvh-server.de Port 80</address>
-</body></html>
-cassini/root# nc --help
-nc: invalid option -- '-'
-nc -h for help
-cassini/root# nc -h
-[v1.10-41+b1]
-connect to somewhere: nc [-options] hostname port[s] [ports] ...
-listen for inbound: nc -l -p port [-options] [hostname] [port]
-options:
- -c shell commands as `-e'; use /bin/sh to exec [dangerous!!]
- -e filename program to exec after connect [dangerous!!]
- -b allow broadcasts
- -g gateway source-routing hop point[s], up to 8
- -G num source-routing pointer: 4, 8, 12, ...
- -h this cruft
- -i secs delay interval for lines sent, ports scanned
- -k set keepalive option on socket
- -l listen mode, for inbound connects
- -n numeric-only IP addresses, no DNS
- -o file hex dump of traffic
- -p port local port number
- -r randomize local and remote ports
- -q secs quit after EOF on stdin and delay of secs
- -s addr local source address
- -T tos set Type Of Service
- -t answer TELNET negotiation
- -u UDP mode
- -v verbose [use twice to be more verbose]
- -w secs timeout for connects and final net reads
- -C Send CRLF as line-ending
- -z zero-I/O mode [used for scanning]
-port numbers can be individual or ranges: lo-hi [inclusive];
-hyphens in port names must be backslash escaped (e.g. 'ftp\-data').
-cassini/root# nc -C 88.99.194.201 80
-GET /
-<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
-<html><head>
-<title>302 Found</title>
-</head><body>
-<h1>Found</h1>
-<p>The document has moved <a href="https://www.hochschule-bochum.de/cvh/">here</a>.</p>
-<hr>
-<address>Apache/2.4.25 (Debian) Server at main-0.cvh-server.de Port 80</address>
-</body></html>
-cassini/root# host m31.gerwinski.de
-m31.gerwinski.de has address 88.198.170.60
-m31.gerwinski.de mail is handled by 10 mx2.gerwinski.de.
-cassini/root# nc 88.198.170.60 25
-Hallo?
-554 SMTP synchronization error
-cassini/root# nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.84_2 Thu, 08 Nov 2018 18:01:21 +0100
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM <gates@microsoft.com>
-500 unrecognized command
-MAIL FROM: <gates@microsoft.com>
-250 OK
-RCPT TO: <peter@gerwinski.de>
-451-195.37.15.82 is not yet authorized to deliver mail from
-451 <gates@microsoft.com> to <peter@gerwinski.de>. Please try later.
-MAIL FROM: <gates@microsoft.com>
-503 sender already given
-RCPT TO: <peter@gerwinski.de>
-250 Accepted
-DATA
-354 Enter message, ending with "." on a line by itself
-From: Steve Jobs <jobs@apple.com>
-To: Peter Gerwinski <peter@gerwinski.de>
-Subject: Hi! B-)
-
-Hallo.
-SMTP ist schon was Tolles, oder?
-So einfach ist es, E-Mail-Adressen zu fälschen.
-.
-250 OK id=1gKnij-00026L-3I
-MAIL FROM: <rms@gnu.org>
-250 OK
-RCPT TO: <michele.lunghini@hs-bochum.de>
-550 relay not permitted
-MAIL FROM: <peter@gerwinski.de>
-503 sender already given
-RESET
-500-unrecognized command
-500 Too many syntax or protocol errors
-cassini/root# nc 88.198.170.60 25
-220 mx1.gerwinski.de ESMTP Exim 4.84_2 Thu, 08 Nov 2018 18:06:39 +0100
-HELO cassini
-250 mx1.gerwinski.de Hello cassini [195.37.15.82]
-MAIL FROM: <peter@gerwinski.de>
-250 OK
-RCPT TO: <michele.lunghini@hs-bochum.de>
-550 relay not permitted
-HELP
-214-Commands supported:
-214 AUTH STARTTLS HELO EHLO MAIL RCPT DATA NOOP QUIT RSET HELP
-HELP AUTH
-214-Commands supported:
-214 AUTH STARTTLS HELO EHLO MAIL RCPT DATA NOOP QUIT RSET HELP
-AUTH
-503 AUTH command used when not advertised
-BYE
-500 unrecognized command
-QUIT
-221 mx1.gerwinski.de closing connection
-cassini/root#
diff --git a/20181108/logo-hochschule-bochum-cvh-text-v2.pdf b/20181108/logo-hochschule-bochum-cvh-text-v2.pdf
deleted file mode 120000
index 4aa99b8f81061aca6dcaf43eed2d9efef40555f8..0000000000000000000000000000000000000000
--- a/20181108/logo-hochschule-bochum-cvh-text-v2.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum-cvh-text-v2.pdf
\ No newline at end of file
diff --git a/20181108/logo-hochschule-bochum.pdf b/20181108/logo-hochschule-bochum.pdf
deleted file mode 120000
index b6b9491e370e499c9276918182cdb82cb311bcd1..0000000000000000000000000000000000000000
--- a/20181108/logo-hochschule-bochum.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum.pdf
\ No newline at end of file
diff --git a/20181108/pgslides.sty b/20181108/pgslides.sty
deleted file mode 120000
index 5be1416f4216f076aa268901f52a15d775e43f64..0000000000000000000000000000000000000000
--- a/20181108/pgslides.sty
+++ /dev/null
@@ -1 +0,0 @@
-../common/pgslides.sty
\ No newline at end of file
diff --git a/20181108/photo-20181108-184032.jpg b/20181108/photo-20181108-184032.jpg
deleted file mode 100644
index 81fc86ec25b9128977ddbb8247d2e5377c5e1b59..0000000000000000000000000000000000000000
Binary files a/20181108/photo-20181108-184032.jpg and /dev/null differ
diff --git a/20181108/photo-20181108-184032.txt b/20181108/photo-20181108-184032.txt
deleted file mode 100644
index b227825f09a0042066602ea0bc30453de1800908..0000000000000000000000000000000000000000
--- a/20181108/photo-20181108-184032.txt
+++ /dev/null
@@ -1 +0,0 @@
-README: interne IP-Adressen, TCP/IP-Schichtenmodell
diff --git a/20181108/smtp-2.txt b/20181108/smtp-2.txt
deleted file mode 100644
index 4dc767659e05550c596cbc645f1aa59eb1e981c6..0000000000000000000000000000000000000000
--- a/20181108/smtp-2.txt
+++ /dev/null
@@ -1,160 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181108> nc mx1.gerwinski.de 25
-220 mx1.gerwinski.de ESMTP Exim 4.84_2 Thu, 08 Nov 2018 18:15:35 +0100
-ehlo cassini
-250-mx1.gerwinski.de Hello cassini [195.37.15.82]
-250-SIZE 52428800
-250-8BITMIME
-250-PIPELINING
-250-AUTH LOGIN CRAM-MD5
-250-STARTTLS
-250 HELP
-quit
-221 mx1.gerwinski.de closing connection
-cassini/home/peter/bo/2018ws/es/20181108> openssl s_client -host mx1.gerwinski.de -port 25 -starttls smtp CONNECTED(00000003)
-depth=2 O = Digital Signature Trust Co., CN = DST Root CA X3
-verify return:1
-depth=1 C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
-verify return:1
-depth=0 CN = gerwinski.de
-verify return:1
----
-Certificate chain
- 0 s:/CN=gerwinski.de
- i:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
- 1 s:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
- i:/O=Digital Signature Trust Co./CN=DST Root CA X3
----
-Server certificate
------BEGIN CERTIFICATE-----
-MIIMezCCC2OgAwIBAgISA47y0al9/s6P3YhIkHzpEyiHMA0GCSqGSIb3DQEBCwUA
-MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
-ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODEwMDIyMTA1NTZaFw0x
-ODEyMzEyMTA1NTZaMBcxFTATBgNVBAMTDGdlcndpbnNraS5kZTCCASIwDQYJKoZI
-hvcNAQEBBQADggEPADCCAQoCggEBANEDWzL2kvPfQbuVxHCVb5wKacd4r4JvfMmz
-s3azznEdnIaADZYFl3IBHkG8RcyRAhpCgsRjveHWgOXmJaVpBL8Hj7piYH2yhONt
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-3+2F3+KFiHulKaf+rKi1XFbHH98Y9qIuCtNY+Agssa8W/uANDYGtD0T9uniTD0E6
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-zvXTHzgri9X6tPxM8taHoFtgbDSzQnho4v/EV0SZ0Pcz5LkZCqkCAwEAAaOCCYww
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-MC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQub3Jn
-MC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQub3Jn
-LzCCBo0GA1UdEQSCBoQwggaAggY4bmcuZGWCFmFud2VuZGVyZm9ydW0uZ251cHAu
-ZGWCEGFyY2hpdmUuZy1uLXUuZGWCCmZoLXNvZnQuZGWCDGdlcndpbnNraS5kZYIO
-Z251LXBhc2NhbC5jb22CDWdudS1wYXNjYWwuZGWCDmdudS1wYXNjYWwub3Jngg1n
-bnVwYXNjYWwuY29tggxnbnVwYXNjYWwuZGWCDWdudXBhc2NhbC5vcmeCCmdyeC5n
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-a2kuZGWCEG14My5nZXJ3aW5za2kuZGWCE25nYzIyNC5nZXJ3aW5za2kuZGWCEHBh
-dGluZm8uZmZpaS5vcmeCDnBhdGluZm8uZ251LmRlgghzbnNnLm9yZ4IMc3dwYXQu
-Z251LmRlgg1zd3BhdHMuZ251LmRlghd0cmljaG9jZXJldXMucGlla3NpZy5kZYIK
-d3d3LjhuZy5kZYIVd3d3LmFuamEuZ2Vyd2luc2tpLmRlghZ3d3cuYW5qYS5nZXJ3
-aW5za2kubmV0ghZ3d3cuYW5qYS5nZXJ3aW5za2kub3Jngh53d3cuYmVhdXR5LXdl
-bGxuZXNzLWJvdHRyb3AuZGWCGnd3dy5iZW5lZGlrdC13aWxkZW5oYWluLmRlggp3
-d3cuYm81LmRlghx3d3cuYm9keS1hbmQtbWluZC16ZW50cnVtLmRlghF3d3cuY2Fu
-ZGljaGF0LmNvbYIWd3d3LmNhbmRpY2hhdC5kb2xscy5kZYIMd3d3LmRvbGxzLmRl
-gg53d3cuZHJld2l0ei5kZYIOd3d3LmVjaGFuZ2UuZGWCDHd3dy5lZnJlZS5kZYIL
-d3d3LmVsdWcuZGWCEHd3dy5lb2YuZG9sbHMuZGWCC3d3dy5lb2ZkLmRlghZ3d3cu
-ZXJpY2guZ2Vyd2luc2tpLmRlgg53d3cuZmgtc29mdC5kZYIRd3d3LmdlcndpbnNr
-aS5jb22CEHd3dy5nZXJ3aW5za2kuZGWCEHd3dy5nZXJ3aW5za2kuZXWCEXd3dy5n
-ZXJ3aW5za2kubmV0ghF3d3cuZ2Vyd2luc2tpLm9yZ4IQd3d3LmdlcndpbnNreS5k
-ZYISd3d3LmdudS1wYXNjYWwuY29tghF3d3cuZ251LXBhc2NhbC5kZYISd3d3Lmdu
-dS1wYXNjYWwub3Jnggp3d3cuZ251LmRlghR3d3cuZ251LmdlcndpbnNraS5kZYIV
-d3d3LmdudS5nZXJ3aW5za2kubmV0ghV3d3cuZ251LmdlcndpbnNraS5vcmeCEXd3
-dy5nbnVwYXNjYWwuY29tghB3d3cuZ251cGFzY2FsLmRlghF3d3cuZ251cGFzY2Fs
-Lm9yZ4INd3d3LmdudXBwLmNvbYIMd3d3LmdudXBwLmRlgg13d3cuZ251cHAub3Jn
-gg53d3cuZ3J4LmdudS5kZYIfd3d3LmhhcnRtYW5uLXRyZXBwZW5wcm9ncmFtbS5k
-ZYIXd3d3Lmhlcm9lbi5nZXJ3aW5za2kuZGWCHnd3dy5raW5kZXJ0cmVmZi16d2Vy
-Z2VubGFuZC5kZYIXd3d3Lm1hcmt1cy5nZXJ3aW5za2kuZGWCGHd3dy5tYXJrdXMu
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-ZGUwgf4GA1UdIASB9jCB8zAIBgZngQwBAgEwgeYGCysGAQQBgt8TAQEBMIHWMCYG
-CCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0Lm9yZzCBqwYIKwYBBQUH
-AgIwgZ4MgZtUaGlzIENlcnRpZmljYXRlIG1heSBvbmx5IGJlIHJlbGllZCB1cG9u
-IGJ5IFJlbHlpbmcgUGFydGllcyBhbmQgb25seSBpbiBhY2NvcmRhbmNlIHdpdGgg
-dGhlIENlcnRpZmljYXRlIFBvbGljeSBmb3VuZCBhdCBodHRwczovL2xldHNlbmNy
-eXB0Lm9yZy9yZXBvc2l0b3J5LzCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB2ANt0
-r+7LKeyx/so+cW0s5bmquzb3hHGDx12dTze2H79kAAABZjbQ9boAAAQDAEcwRQIh
-AJPQ1+HbR+G9n3z0VafB0i4JeSy8ezBIroY4MKL8R+KTAiAv0BTWlVbkILpUxHBJ
-SETcFM6BNO3J88nis6exkYpYJQB2ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLcpMMM
-9OVFR/R4AAABZjbQ9fgAAAQDAEcwRQIgd0pz3MdhGmf5NwUi9LRA2Hlvqk+QdPBS
-A8+bk2eNhKcCIQDRp1qB20SMcGO2QQn5dwCBXgCyc5eWmrBx9VTIm62NFDANBgkq
-hkiG9w0BAQsFAAOCAQEAZZD+pDD5smr9AMsz2OPQgDl4QeQD3oOU2t7WwxeRgsHk
-LvaDyMSa5rQh62kUVpG2lDPqkeP5UNnHLE/CPpXLlTs7ZSd0DlL10mZ/BneRigul
-E5/rRVhMJYP+nU+uRNoqbD3CHF7dfJ44xNw7Y8ZrhlbRzs3slIpDbhKruRhg1tIR
-MnfAJEJ2+hJDVVFRgATm72i90Ecl4+klaRSDfEt0GeV6B6YvQBAkKRbyq1PQQozA
-ZMEiarGBCXE9jd23ogtOQadF6J08LWmyZUTOdrrPgfm1/SpilLa+a4jm47O4jcwV
-OAziXj37J3GdFSocAChhBWTVyAMMNGsCmEK+Gx+N7A==
------END CERTIFICATE-----
-subject=/CN=gerwinski.de
-issuer=/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
----
-No client certificate CA names sent
-Peer signing digest: SHA512
-Server Temp Key: ECDH, P-256, 256 bits
----
-SSL handshake has read 5129 bytes and written 335 bytes
-Verification: OK
----
-New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384
-Server public key is 2048 bit
-Secure Renegotiation IS supported
-Compression: NONE
-Expansion: NONE
-No ALPN negotiated
-SSL-Session:
- Protocol : TLSv1.2
- Cipher : ECDHE-RSA-AES256-GCM-SHA384
- Session-ID: 6CA553D3D00570392E646AA1F5F14AE45811D6E3D9889E8C1AF44F3BFB40A767
- Session-ID-ctx:
- Master-Key: 3A3B033166ACAF4355AB76E782BEC8C8B7139D76BA765BE68B680212C914979DE56D2F4478551921ECF6546C983F436E
- PSK identity: None
- PSK identity hint: None
- SRP username: None
- Start Time: 1541697411
- Timeout : 7200 (sec)
- Verify return code: 0 (ok)
- Extended master secret: no
----
-250 HELP
-ehlo cassini
-250-mx1.gerwinski.de Hello cassini [195.37.15.82]
-250-SIZE 52428800
-250-8BITMIME
-250-PIPELINING
-250-AUTH PLAIN LOGIN CRAM-MD5
-250 HELP
-auth
-504 authentication mechanism not supported
-auth plain
-334
-mail from: me@gerwinski.de
-501 Invalid base64 data
-rset
-250 Reset OK
-mail from: me@gerwinski.de
-250 OK
-rcpt to: peter@gerwinski.de
-451-195.37.15.82 is not yet authorized to deliver mail from <me@gerwinski.de>
-451 to <peter@gerwinski.de>. Please try later.
-rcpt to: peter@gerwinski.de
-250 Accepted
-data
-354 Enter message, ending with "." on a line by itself
-subject: x
-
-hallo
-.
-250 OK id=1gKnwY-00033a-6i
-quit
-221 mx1.gerwinski.de closing connection
-closed
-cassini/home/peter/bo/2018ws/es/20181108>
diff --git a/20181108/streams-1.txt b/20181108/streams-1.txt
deleted file mode 100644
index 14baa62ccdc73c0f1fcef401ba2ef00b1607078d..0000000000000000000000000000000000000000
--- a/20181108/streams-1.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181108> cat gibtsnicht.txt
-cat: gibtsnicht.txt: Datei oder Verzeichnis nicht gefunden
-cassini/home/peter/bo/2018ws/es/20181108> cat gibtsnicht.txt 2>/dev/null
-cassini/home/peter/bo/2018ws/es/20181108> cat /dev/null
-cassini/home/peter/bo/2018ws/es/20181108> ls -l /dev/null
-crw-rw-rw- 1 root root 1, 3 Okt 21 20:46 /dev/null
-cassini/home/peter/bo/2018ws/es/20181108> echo "2 + 2" | bc
-4
-cassini/home/peter/bo/2018ws/es/20181108> echo "2 + 2" | sed -e 's/2/3/g' | bc
-6
-cassini/home/peter/bo/2018ws/es/20181108> echo "2 + 2" | sed -e 's/2/3/g'
-3 + 3
-cassini/home/peter/bo/2018ws/es/20181108>
diff --git a/20181108/test-1.mail b/20181108/test-1.mail
deleted file mode 100644
index cdc1a24ae7fc33dab377c6e30aebf81d27cd5b55..0000000000000000000000000000000000000000
--- a/20181108/test-1.mail
+++ /dev/null
@@ -1,8 +0,0 @@
-Date: Thu, 08 Nov 2018 18:04:57 +0100
-From: Steve Jobs <jobs@apple.com>
-To: Peter Gerwinski <peter@gerwinski.de>
-Subject: Hi! B-)
-
-Hallo.
-SMTP ist schon was Tolles, oder?
-So einfach ist es, E-Mail-Adressen zu fälschen.
diff --git a/20181108/test-1.mbox b/20181108/test-1.mbox
deleted file mode 100644
index f074735af31441971275f56b19581e2f56f274be..0000000000000000000000000000000000000000
--- a/20181108/test-1.mbox
+++ /dev/null
@@ -1,48 +0,0 @@
-From gates@microsoft.com Thu Nov 08 18:04:58 2018
-Return-path: <gates@microsoft.com>
-Envelope-to: peter@phoenix.intern
-Delivery-date: Thu, 08 Nov 2018 18:04:58 +0100
-Received: from localhost.lan ([127.0.0.1] helo=m31.gerwinski.de)
- by phoenix.intern with esmtp (Exim 4.80)
- (envelope-from <gates@microsoft.com>)
- id 1gKnjl-0001RA-FA
- for peter@phoenix.intern; Thu, 08 Nov 2018 18:04:58 +0100
-Received: from [195.37.15.82] (helo=cassini)
- by m31.gerwinski.de with smtp (Exim 4.84_2)
- (envelope-from <gates@microsoft.com>)
- id 1gKnij-00026L-3I
- for peter@gerwinski.de; Thu, 08 Nov 2018 18:04:56 +0100
-From: Steve Jobs <jobs@apple.com>
-To: Peter Gerwinski <peter@gerwinski.de>
-Subject: Hi! B-)
-Message-Id: <E1gKnjl-0001RA-FA@phoenix.intern>
-Date: Thu, 08 Nov 2018 18:04:57 +0100
-X-Spam_score: 1.6
-X-Spam_score_int: 16
-X-Spam_bar: +
-X-Spam_report: Spam detection software, running on the system "phoenix.intern", has
- identified this incoming email as possible spam. The original message
- has been attached to this so you can view it (if it isn't spam) or label
- similar future email. If you have any questions, see
- @@CONTACT_ADDRESS@@ for details.
-
- Content preview: Hallo. SMTP ist schon was Tolles, oder? So einfach ist es,
- E-Mail-Adressen zu fälschen. [...]
-
- Content analysis details: (1.6 points, 5.0 required)
-
- pts rule name description
- ---- ---------------------- --------------------------------------------------
- 0.0 FSL_HELO_NON_FQDN_1 FSL_HELO_NON_FQDN_1
- 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60%
- [score: 0.4805]
- 0.8 RDNS_NONE Delivered to internal network by a host with no rDNS
- 0.0 HELO_NO_DOMAIN Relay reports its domain incorrectly
-Status: RO
-Content-Length: 89
-Lines: 3
-
-Hallo.
-SMTP ist schon was Tolles, oder?
-So einfach ist es, E-Mail-Adressen zu fälschen.
-
diff --git a/20181108/test-2.mbox b/20181108/test-2.mbox
deleted file mode 100644
index c1d2b73f1b1d11cddfd5505ae8aca0ab1fd52d90..0000000000000000000000000000000000000000
--- a/20181108/test-2.mbox
+++ /dev/null
@@ -1,46 +0,0 @@
-From me@gerwinski.de Thu Nov 08 18:18:18 2018
-Return-path: <me@gerwinski.de>
-Envelope-to: peter@phoenix.intern
-Delivery-date: Thu, 08 Nov 2018 18:18:18 +0100
-Received: from localhost.lan ([127.0.0.1] helo=m31.gerwinski.de)
- by phoenix.intern with esmtp (Exim 4.80)
- (envelope-from <me@gerwinski.de>)
- id 1gKnwf-0002IG-UI
- for peter@phoenix.intern; Thu, 08 Nov 2018 18:18:18 +0100
-Received: from [195.37.15.82] (helo=cassini)
- by m31.gerwinski.de with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
- (Exim 4.84_2)
- (envelope-from <me@gerwinski.de>)
- id 1gKnwY-00033a-6i
- for peter@gerwinski.de; Thu, 08 Nov 2018 18:18:17 +0100
-subject: x
-Message-Id: <E1gKnwf-0002IG-UI@phoenix.intern>
-From: me@gerwinski.de
-Date: Thu, 08 Nov 2018 18:18:17 +0100
-X-Spam_score: 2.6
-X-Spam_score_int: 26
-X-Spam_bar: ++
-X-Spam_report: Spam detection software, running on the system "phoenix.intern", has
- identified this incoming email as possible spam. The original message
- has been attached to this so you can view it (if it isn't spam) or label
- similar future email. If you have any questions, see
- @@CONTACT_ADDRESS@@ for details.
-
- Content preview: hallo [...]
-
- Content analysis details: (2.6 points, 5.0 required)
-
- pts rule name description
- ---- ---------------------- --------------------------------------------------
- 0.0 FSL_HELO_NON_FQDN_1 FSL_HELO_NON_FQDN_1
- 1.0 MISSING_HEADERS Missing To: header
- 0.8 BAYES_50 BODY: Bayes spam probability is 40 to 60%
- [score: 0.4886]
- 0.8 RDNS_NONE Delivered to internal network by a host with no rDNS
- 0.0 HELO_NO_DOMAIN Relay reports its domain incorrectly
- 0.0 TO_NO_BRKTS_NORDNS To: misformatted and no rDNS
-Content-Length: 6
-Lines: 1
-
-hallo
-
diff --git a/20181108/vic-1.txt b/20181108/vic-1.txt
deleted file mode 100644
index dbe7f9684b4f554bae98fb0cc5d5ceca5987e71e..0000000000000000000000000000000000000000
--- a/20181108/vic-1.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-cassini/home/peter/bo/2018ws/es/20181108> ls -rt *.c *.cpp *.sh *.py *.tex ls: Zugriff auf '*.cpp' nicht möglich: Datei oder Verzeichnis nicht gefunden
-ls: Zugriff auf '*.sh' nicht möglich: Datei oder Verzeichnis nicht gefunden
-ls: Zugriff auf '*.py' nicht möglich: Datei oder Verzeichnis nicht gefunden
-hello.c es-20182208.tex hello-42.c
-cassini/home/peter/bo/2018ws/es/20181108> ls -rt *.c *.cpp *.sh *.py *.tex 2> /dev/null
-hello.c es-20182208.tex hello-42.c
-cassini/home/peter/bo/2018ws/es/20181108> ls -rt *.c *.cpp *.sh *.py *.tex 2> /dev/null | tail -1
-hello-42.c
-cassini/home/peter/bo/2018ws/es/20181108> file_template=$( ls -rt *.c *.cpp *.sh *.py *.tex 2> /dev/null | tail -1 )
-cassini/home/peter/bo/2018ws/es/20181108> echo $file_template
-hello-42.c
diff --git a/20181115/photo-20181115-185731.jpg b/20181115/photo-20181115-185731.jpg
deleted file mode 100644
index c6cf8cbc08c53a45a434b5e995e77e94d32af255..0000000000000000000000000000000000000000
Binary files a/20181115/photo-20181115-185731.jpg and /dev/null differ
diff --git a/20181115/photo-20181115-185731.txt b/20181115/photo-20181115-185731.txt
deleted file mode 100644
index 4bfc5538c0ad99445572ec10c8e673f838fe11cd..0000000000000000000000000000000000000000
--- a/20181115/photo-20181115-185731.txt
+++ /dev/null
@@ -1 +0,0 @@
-README: Routing, NAT
diff --git a/20181115/photo-20181115-185835.jpg b/20181115/photo-20181115-185835.jpg
deleted file mode 100644
index 2e66236bd07af65df4a2409f66dc16130c33835b..0000000000000000000000000000000000000000
Binary files a/20181115/photo-20181115-185835.jpg and /dev/null differ
diff --git a/20181115/photo-20181115-185835.txt b/20181115/photo-20181115-185835.txt
deleted file mode 100644
index a13adfc5078ccc0d6e15594994195e1198db3ab8..0000000000000000000000000000000000000000
--- a/20181115/photo-20181115-185835.txt
+++ /dev/null
@@ -1 +0,0 @@
-README: Netzmasken, private IP-Bereiche
diff --git a/20181122/I2C_data_transfer.pdf b/20181122/I2C_data_transfer.pdf
deleted file mode 100644
index 0d5b8a241c624391cbf6f3a30f26320559358e1d..0000000000000000000000000000000000000000
Binary files a/20181122/I2C_data_transfer.pdf and /dev/null differ
diff --git a/20181122/SPI_single_slave.pdf b/20181122/SPI_single_slave.pdf
deleted file mode 100644
index 6f724dad4a8ed23b262b0b1c672bf85b72405155..0000000000000000000000000000000000000000
Binary files a/20181122/SPI_single_slave.pdf and /dev/null differ
diff --git a/20181122/SPI_three_slaves.pdf b/20181122/SPI_three_slaves.pdf
deleted file mode 100644
index b67dc94c790a62935c7b353449e2ce8c75a7d9fe..0000000000000000000000000000000000000000
Binary files a/20181122/SPI_three_slaves.pdf and /dev/null differ
diff --git a/20181122/SPI_three_slaves_daisy_chained.pdf b/20181122/SPI_three_slaves_daisy_chained.pdf
deleted file mode 100644
index 46ac2027cfcbd598a609e43ce74e19e75d374ead..0000000000000000000000000000000000000000
Binary files a/20181122/SPI_three_slaves_daisy_chained.pdf and /dev/null differ
diff --git a/20181122/Zeichen_123.pdf b/20181122/Zeichen_123.pdf
deleted file mode 120000
index fdbc897227df059cfda790a16555e6e417682116..0000000000000000000000000000000000000000
--- a/20181122/Zeichen_123.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/Zeichen_123.pdf
\ No newline at end of file
diff --git a/20181122/es-20181122.pdf b/20181122/es-20181122.pdf
deleted file mode 100644
index 87ae3461305efab3acaf91b15423d761d8869e3f..0000000000000000000000000000000000000000
Binary files a/20181122/es-20181122.pdf and /dev/null differ
diff --git a/20181122/es-20181122.tex b/20181122/es-20181122.tex
deleted file mode 100644
index fe3357bf989588e13822829256e314eaa24de1d7..0000000000000000000000000000000000000000
--- a/20181122/es-20181122.tex
+++ /dev/null
@@ -1,851 +0,0 @@
-% es-20181122.pdf - Lecture Slides on Embedded Systems
-% Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-% README: TCP/IP in der Praxis: SSH, X11, GNU screen, Programmierung; Bus-Systeme
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{rotating}
-\usepackage{tikz}
-
-\newcommand{\underconstruction}{%
- \begin{picture}(0,0)
- \put(9,0.9){\makebox(0,0)[b]{\includegraphics[width=1.5cm]{Zeichen_123.pdf}}}
- \put(9,0.6){\makebox(0,0)[t]{\shortstack{Änderungen\\vorbehalten}}}
- \end{picture}}
-
-\title{Eingebettete Systeme}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{22.\ November 2018}
-
-\newcommand{\ItwoC}{I\raisebox{0.5ex}{\footnotesize 2}C}
-
-\begin{document}
-
-\maketitleframe
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \begin{itemize}
- \color{medgreen}
- \item[3.0] Vorbereitungen
- \item[3.1] IP-Adressen
- \item[3.2] TCP- und UDP-Ports
- \item[3.3] TCP-Protokolle
- \item[3.4] Routing
- \item[3.5] Netzwerkanalyse
- \color{orange}
- \item[3.6] SSH
- \color{red}
- \item[3.7] X11
- \item[3.8] GNU screen
- \item[3.9] Programmierung
- \end{itemize}
- \item[\textbf{4}] \textbf{Bus-Systeme}
- \item[\textbf{6}] \textbf{Echtzeit}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\setcounter{section}{2}
-\section{TCP/IP in der Praxis}
-\setcounter{subsection}{-1}
-\subsection{Vorbereitungen}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Verkabelung: Twisted-Pair-Kabel, Switches
- \smallskip
- \item
- Automatismen abschalten
- \end{itemize}
-
-\end{frame}
-
-\subsection{IP-Adressen}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item IP-Adresse zuweisen:\\
- \lstinline[style=cmd]{ip addr} (Linux)\\
- \lstinline[style=cmd]{ifconfig} (Unix allgemein)\\
- \lstinline[style=cmd]{ipconfig} (MS Windows)
- \smallskip
- \item % \lstinline[style=cmd]{ip addr add <Netz>}
-% \\
- Beispiel:\\
- \lstinline[style=cmd]{ip addr add 192.168.42.197/24}\\
-% \item \lstinline[style=cmd]{ip link}
- \smallskip
- \item Verbindung prüfen:\\
- \lstinline[style=cmd]{ping <IP-Adresse>}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- IPv4-Adressen:
- \begin{itemize}
- \item
- 32 Bit
- \item
- dezimal, 4 Gruppen zu je 8 Bit (0--255), durch Punkte getrennt
- \end{itemize}
-
- \medskip
-
- IPv6-Adressen:
- \begin{itemize}
- \item
- 128 Bit
- \item
- hexadezimal, 8 Gruppen zu je 4 Hex-Ziffern, durch Doppelpunkte getrennt
- \item
- Führende Nullen dürfen weggelassen werden.
- \item
- Zwei Dopppelpunkte bedeuten: Mit Nullen auffüllen.
- \item
- Literatur und Beispiel: \url{https://de.wikipedia.org/wiki/IPv6}
- \end{itemize}
-
-\end{frame}
-
-%\subsection{MAC-Adressen}
-%
-%\begin{frame}
-%
-% \showsubsection
-%
-% \begin{itemize}
-% \item \lstinline[style=cmd]{ip neig}
-% \end{itemize}
-%
-%\end{frame}
-
-\subsection{TCP- und UDP-Ports}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{nc <IP> <Port>}\\
- Verbindung zu Programm $\langle$Port$\rangle$
- auf Rechner $\langle$IP$\rangle$ aufnehmen
- \item
- \lstinline[style=cmd]{nc -l <Port>}
- oder
- \lstinline[style=cmd]{nc -p <Port> -l}\\
- auf eingehende Verbindungen warten ("`lauschen"')
- \medskip
- \item
- TCP-Ports: Verbindungskonzept, Netzwerk prüft
- \item
- UDP-Ports: einzelne Pakete, Anwendung muß selbst prüfen
- \item
- ICMP: keine Ports, nur Rechner:\\
- Erreichbarkeit, Eigenschaften der Übertragung
- \end{itemize}
-
- \medskip
-
- \begin{center}
- \renewcommand{\arraystretch}{1.2}
- \begin{tabular}{|l|}\hline
- Anwendung: HTTP, SMTP, \dots \\\hline
- Transport: TCP-/UDP-Ports, ICMP \\\hline
- Internet: IP-Adresse \\\hline
- Netzwerkzugang: Hardware-/MAC-Adresse \\\hline
- \end{tabular}
- \end{center}
-
-\end{frame}
-
-\subsection{TCP-Protokolle}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \textbf{HTTP}\\
- \lstinline[style=terminal]{$ ¡nc -C <Rechner> 80¿}\\
- \lstinline[style=cmd]{GET / HTTP/1.1}\\
- \lstinline[style=cmd]{Host: www.hs-bochum.de}\\
- (Leerzeile)
- \begin{onlyenv}<2>
- \par\medskip
- URL: Schema://Benutzer:Passwort@Rechner:port/Pfad?Query\#Fragment
- \end{onlyenv}
- \begin{onlyenv}<3->
- \medskip
- \item
- \textbf{SMTP}\\
- \lstinline[style=cmd]{HELO cassini}\\
- \lstinline[style=cmd]{MAIL FROM: <example@example.com>}\\
- \lstinline[style=cmd]{RCPT TO: <beispiel@example.de>}\\
- (E-Mail-Header -- Teil der Nutzdaten)\\
- \lstinline[style=cmd]{From: Eddie Example <example@example.com>}\\
- \lstinline[style=cmd]{To: Bert Beispiel <beispiel@example.de>}\\
- \lstinline[style=cmd]{Subject: Hello, world!}\\
- (Leerzeile)\\
- \lstinline[style=cmd]{Hi, there!}\\
- \lstinline[style=cmd]{.}
- \medskip
- \item
- Protokolle "`mal eben"' selbst schreiben: \file{inetd}
- \vspace*{-1cm}
- \end{onlyenv}
- \end{itemize}
-
-\end{frame}
-
-\subsection{Routing}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{ip route} (Linux)\\
- \lstinline[style=cmd]{route} (MS-Windows, Unix)\\
- \lstinline[style=cmd]{netstat -nr} (MacOS)\\[\medskipamount]
- \hspace*{-0.85cm}\includegraphics[width=12.5cm,trim={0cm 7cm 0cm 3cm},clip]{../20181115/photo-20181115-185731.jpg}\hspace*{-0.75cm}
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\subsection{Netzwerkanalyse}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{tcpdump}
- \item
- \lstinline[style=cmd]{wireshark}
- \item
- \lstinline[style=cmd]{ettercap}
- \end{itemize}
-
-\end{frame}
-
-\subsection{SSH}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{SSH <Rechner>}
- \item
- \lstinline[style=cmd]{-C}: Komprimierung
- \item
- \lstinline[style=cmd]{-L}: lokalen Port auf Remote-Port umleiten
- \item
- \lstinline[style=cmd]{-R}: Remote-Port auf lokalen Port umleiten
- \end{itemize}
-
-\end{frame}
-
-\subsection{X11}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Grafik-Bildschirm und Eingabegeräte über's Netz
- \item
- \lstinline[style=cmd]{DISPLAY}-Variable: X-Server: Rechner und Bildschirm
- \item
- \lstinline[style=cmd]{ssh -X}: X11-Forwarding
- \end{itemize}
-
-\end{frame}
-
-\subsection{GNU screen}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Text-Bildschirm und Eingabegeräte über's Netz
- \item
- \lstinline[style=cmd]{Ctrl+A c}: neues Fenster (create)
- \item
- \lstinline[style=cmd]{Ctrl+A Leertaste}: nächstes Fenster
- \item
- \lstinline[style=cmd]{Ctrl+A 3}: Fenster Nr.\ 3
- \item
- \lstinline[style=cmd]{Ctrl+A ESC}: hochscrollen, suchen, markieren (copy)
- \item
- \lstinline[style=cmd]{Ctrl+A Ctrl+]}: einfügen (paste)
- \item
- \lstinline[style=cmd]{Ctrl+A d}: von \file{screen} ablösen (detach)
- \item
- \lstinline[style=cmd]{screen -x}: an laufenden \file{screen} andocken
- \medskip
- \item
- ähnliche Funktionalität für Grafik: \file{x2go}
- \end{itemize}
-
-\end{frame}
-
-\subsection{Programmierung}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \file{tcpip-server-0.c}: auf Port 1234 lauschen, "`Hello, world!"' senden
- \item
- \file{tcpip-client-0.c}: Webseite \url{http://ngc224.gerwinski.de} abrufen
- \end{itemize}
-
-\end{frame}
-
-\section{Bus-Systeme}
-\subsection{Was sind Bus-Systeme?}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{quote}
- Ein Bus ist ein System zur Datenübertragung zwischen mehreren
- Teilnehmern über einen gemeinsamen Übertragungsweg.
-% \color{gray}
-% Findet eine Datenübertragung zwischen zwei Teilnehmern statt, so
-% müssen die übrigen Teilnehmer schweigen, da sie sich sonst
-% gegenseitig stören würden. Umgangssprachlich werden mitunter --
-% oft aus historischen Gründen – auch Datenübertragungssysteme als
-% "`Bus"' bezeichnet, die technisch eigentlich eine andere
-% Topologie besitzen.
-
- \medskip
-
- \strut\hfill\url{https://de.wikipedia.org/wiki/Bus_(Datenverarbeitung)}
- \end{quote}
- Beispiele:
- \begin{itemize}
- \item
- Computer kommuniziert mit Peripherie
- \item
- Computer kommunizieren (direkt) miteinander
- \item
- Prozessor kommuniziert mit externem Speicher
- \item
- Teile eines Prozessors kommunizieren miteinander
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
- Standard-Computer:
- \begin{itemize}
- \item
- Einsteckkarten: PCI (und Vorgänger)
- \item
- Festplatten: SATA (und Vorgänger)
- \item
- USB, FireWire, \dots
- \item
- Ethernet, CAN-Bus, \dots
- \item
- WLAN, BlueTooth, IR, \dots
- \item
- PS/2, RS-232, Centronics
- \end{itemize}
-
- \medskip
-
- Minimal-Hardware:
- \begin{itemize}
- \item
- RS-232
- \item
- \ItwoC\ (TWI)
- \item
- SPI
- \end{itemize}
-
- \begin{onlyenv}<1>
- \begin{picture}(0,0)
- \put(5,1.5){\includegraphics[height=3cm]{motherboard-anschluesse.jpg}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<2>
- \begin{picture}(0,0)(-1.3,-4)
- \put(1.8,-4.9){\includegraphics[height=3.5cm]{kompassmodul-an-roboter.jpg}}
- \put(6.1,-3.3){\includegraphics[height=4.5cm]{kompassmodul.jpg}}
- \put(6.1,1.2){\makebox(0,0)[tr]{\tikz{\draw(0,0)--(-1.9,-3.6);}}}
- \put(6.1,-3.3){\makebox(0,0)[br]{\tikz{\draw(0,0)--(-1.8,0.2);}}}
- \end{picture}
- \end{onlyenv}
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsection
- \showsubsection
-
- \vspace*{-\bigskipamount}
- \begin{tabbing}
- \newterm{Punkt-zu-Punkt}\quad\=\kill
- \newterm{seriell} \> jedes Bit einzeln übertragen\\
- \newterm{parallel} \> mehrere Bits gleichzeitig\\[\smallskipamount]
- \newterm{synchron} \> Abgleich über Steuerleitung: \newterm{Takt}\\
- \newterm{asynchron} \> Abgleich über Zeitvereinbarungen\\[\smallskipamount]
- \newterm{Punkt-zu-Punkt} \> genau zwei Teilnehmer\\
- \newterm{busfähig} \> mehrere Teilnehmer, mit \newterm{Adressierung}
- \end{tabbing}
-
- \begin{itemize}
- \item
- \ItwoC: seriell, synchron, mit Adressierung
- \item
- RS-232: seriell, asynchron, Punkt-zu-Punkt
- \item
- RS-485, USB, CAN: seriell, asynchron, mit Adressierung
- \item
- SPI: seriell, synchron, Punkt-zu-Punkt oder mit Adressierung
- \end{itemize}
-
-\end{frame}
-
-\subsection{RS-232}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- seriell
- \begin{itemize}
- \item
- \newterm{TX\/}: 1 Leitung für Daten
- \item
- \newterm{RX\/}: ggf.\ 1 Leitung für Daten in der anderen Richtung
- \item
- \newterm{GND\/}: gemeinsame \newterm{Masse}
- \item
- evtl.\ zusätzliche Steuerleitungen
- \end{itemize}
-
- \medskip
-
- asynchron
- \begin{itemize}
- \item
- \emph{keine\/} Taktleitung für Abgleich, wann Daten anliegen
- \item
- Stattdessen: Abgleich über Zeitvereinbarungen
- \arrowitem
- Jeder Teilnehmer braucht eine eigene Zeitbasis.
- \end{itemize}
-
- \medskip
-
- Punkt-zu-Punkt
- \begin{itemize}
- \item
- nur 2 Teilnehmer vorgesehen
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \showsubsection
- \vspace*{-0.35cm}
- \begin{center}
- \includegraphics[scale=0.9]{rs-232.pdf}
- \end{center}
-\end{frame}
-
-\subsection{\protect\ItwoC\ (TWI)}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \ItwoC\ = Inter-IC; TWI = Two-Wire-Interface
-
- \medskip
-
- seriell
- \begin{itemize}
- \item
- \newterm{SDA\/}: 1 Leitung für Daten (in beiden Richtungen)
- \item
- \newterm{SCL\/}: Taktleitung (Clock)
- \item
- \newterm{GND\/}: gemeinsame Masse
- \item
- evtl.\ \newterm{VCC\/}: Stromversorgung für Peripheriegerät
- \end{itemize}
-
- \medskip
-
- synchron
- \begin{itemize}
- \item
- Abgleich über\\Taktleitung
- \begin{picture}(0,0)
- \put(0.4,-0.4){\includegraphics[width=9.7cm]{I2C_data_transfer.pdf}}
- \end{picture}
- \end{itemize}
-
- \medskip
-
- busfähig
- \begin{itemize}
- \item
- \newterm{Master\/} initiiert Kommuniation und steuert Taktleitung
- \item
- erstes gesendetes Byte: \newterm{Adresse\/} des Teilnehmers
- \item
- 2 Adressen pro Teilnehmer: Lesen/Schreiben
- \end{itemize}
- \vspace*{-1cm}
-\end{frame}
-
-\subsection{SPI}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Serial Peripheral Interface
-
- \medskip
-
- seriell
- \begin{itemize}
- \item
- \newterm{MOSI\/}: Master Out, Slave In
- \item
- \newterm{MISO\/}: Master In, Slave Out
- \item
- \newterm{SCLK\/}: Taktleitung (Clock)
- \item
- \newterm{$\overline{\text{SS}}$\/}: Slave Select (invertiert)
- \item
- \newterm{GND\/}: gemeinsame Masse
- \item
- evtl.\ \newterm{VCC\/}: Stromversorgung für Peripheriegerät
- \end{itemize}
-
- \medskip
-
- synchron
- \begin{itemize}
- \item
- Abgleich über Taktleitung
- \end{itemize}
-
- \medskip
-
- busfähig
- \begin{itemize}
- \item
- \newterm{Master\/} initiiert Kommuniation und steuert Taktleitung
- \item
- \newterm{Slave\/} wird über \newterm{Slave Select\/} ausgewählt
- \begin{picture}(0,0)(0,-0.2)
- \only<1>{\put(-2.175,2.875){\includegraphics[scale=0.7]{SPI_single_slave.pdf}}}
- \only<2>{\put(-2.0,3.0){\includegraphics[scale=0.7]{SPI_three_slaves.pdf}}}
- \only<2>{\put(2.55,3.1){\begin{minipage}[t]{2.5cm}
- \newterm{Stern}
- \end{minipage}}}
- \only<3->{\put(-2.0,3.0){\includegraphics[scale=0.7]{SPI_three_slaves_daisy_chained.pdf}}}
- \only<3->{\put(2.55,3.1){\begin{minipage}[t]{2.5cm}
- \newterm{Kaskade}\\
- \newterm{Daisy Chain}\pause[4]\par\smallskip
- \setlength{\leftskip}{-3.5cm}\small
- Slave gibt MOSI-Input um 1 Takt verzögert
- an MISO aus \textarrow\ Master setzt
- "`im richtigen Moment"' $\overline{\text{SS}}$
- \end{minipage}}}
- \end{picture}
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\iffalse
-
-\subsection{Beispiel: Benutzung des \protect\ItwoC-Busses}
-
-\begin{frame}[fragile]
-
- \showsection
- \showsubsection
-
- \begin{picture}(0,0)
- \put(8.75,-0.75){\includegraphics[height=2.75cm]{kompassmodul.jpg}}
- \end{picture}%
-
- \begin{onlyenv}<1>
- \begin{lstlisting}[gobble=6]
- void read_compass (uint16_t *x, uint16_t *y)
- {
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x02); // set coil
- mSleep (1);
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x04); // reset coil
- mSleep (5);
- uint8_t result[5];
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x01); // Messung starten
- mSleep (5); // 5ms warten, bis Sensor fertig gemessen hat
- I2CTWI_transmitByte (0x60, 0x01); // Leseindex setzen
- I2CTWI_readBytes (0x61, result, 4); // lesen: msb x, lsb x, msb y, lsb y
- result[0] &= 0b00001111; // Unwichtge Bits vom msb abschneiden
- result[2] &= 0b00001111;
- *x = (result[0] << 8) + result[1]; // Wert berechnen aus msb und lsb
- *y = (result[2] << 8) + result[3];
- }
- \end{lstlisting}
- \end{onlyenv}
- \begin{onlyenv}<2-3>
- \begin{lstlisting}[gobble=6,style=shy]
- ²void read_compass (uint16_t *x, uint16_t *y)
- { ... }
-
- int main (void)
- {
- uint16_t compass_x, compass_y;
- read_compass (&compass_x, &compass_y);¿
- ³writeInteger (compass_x, DEC);
- writeChar (' ');
- writeInteger (compass_y, DEC);
- writeChar ('\n');¿
- ²return 0;
- }¿
- \end{lstlisting}
- \end{onlyenv}
- \begin{onlyenv}<4->
- \begin{lstlisting}[gobble=6,style=shy]
- °void read_compass (uint16_t *x, uint16_t *y)
- {
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x02); // set coil
- ¿mSleep (1);
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x04); // reset coil
- mSleep (5);
- uint8_t result[5];
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x01); // Messung starten
- mSleep (5); // 5ms warten, bis Sensor fertig gemessen hat
- I2CTWI_transmitByte (0x60, 0x01); // Leseindex setzen
- I2CTWI_readBytes (0x61, result, 4); // lesen: msb x, lsb x, msb y, lsb y
- result[0] &= 0b00001111; // Unwichtge Bits vom msb abschneiden
- result[2] &= 0b00001111;
- *x = (result[0] << 8) + result[1]; // Wert berechnen aus msb und lsb
- *y = (result[2] << 8) + result[3];
- °}¿
- \end{lstlisting}
- \end{onlyenv}
- \begin{onlyenv}<5-7>
- \begin{picture}(0,0)
- \color{red}
- \put(3.85,5.3){\vector(1,1){0.5}}
- \put(3.5,5.2){\makebox(0,0)[t]{\shortstack{Gerät adressieren:\\Schreib-Adresse}}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<6-7>
- \begin{picture}(0,0)
- \color{red}
- \put(5.25,4.5){\vector(0,1){1.3}}
- \put(5.25,4.4){\makebox(0,0)[t]{\shortstack{Register-Nr.\\innerhalb des Geräts}}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<7>
- \begin{picture}(0,0)
- \color{red}
- \put(6.6,5.3){\vector(-1,1){0.5}}
- \put(6.95,5.2){\makebox(0,0)[t]{Befehl: Spule an}}
- \end{picture}
- \end{onlyenv}
- \vspace*{-2cm}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsection
- \showsubsection
-
- \begin{picture}(0,0)
- \put(8.75,-0.75){\includegraphics[height=2.75cm]{kompassmodul.jpg}}
- \end{picture}%
-
- \begin{lstlisting}[style=shy]
- ¡void read_compass (uint16_t *x, uint16_t *y)
- {
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x02); // set coil
- mSleep (1);
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x04); // reset coil
- mSleep (5);
- ¿²uint8_t result[5];
- I2CTWI_transmit2Bytes (0x60, 0x00, 0x01); // Messung starten
- mSleep (5); // 5ms warten, bis Sensor fertig gemessen hat
- ¿³I2CTWI_transmitByte (0x60, 0x01); // Leseindex setzen
- ¿°I2CTWI_readBytes (0x61, result, 4); // lesen: msb x, lsb x, msb y, lsb y
- result[0] &= 0b00001111; // Unwichtge Bits vom msb abschneiden
- result[2] &= 0b00001111;
- *x = (result[0] << 8) + result[1]; // Wert berechnen aus msb und lsb
- *y = (result[2] << 8) + result[3];
- ¿¡}¿
- \end{lstlisting}
- \vspace*{-2cm}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsection
- \showsubsection
-
- \begin{picture}(0,0)
- \put(8.75,-0.75){\includegraphics[height=2.75cm]{kompassmodul.jpg}}
- \end{picture}%
- Messung:\\
- Roboter im Kreis drehen lassen,\\
- x- und y-Werte aufzeichnen\\
- und gegeneinander auftragen
-
- \smallskip
- Ergebnis: Ellipse
- \begin{picture}(0,0)(0,0.5)
- \put(5,-3){\includegraphics[height=4cm]{kompass-messung.png}}
- \end{picture}%
-
- \bigskip
- Anwendung:\\
- Roboter in eine Himmelsrichtung ausrichten
- \begin{itemize}
- \item
- Achsen normieren:\\
- Mittelwert subtrahieren
- \begin{picture}(0,0)(0,0.5)
- \put(3.75,0.95){\vector(1,0){4}}
- \put(7.55,0.90){\makebox(0,0)[t]{x}}
- \put(5.75,-1.05){\vector(0,1){4}}
- \put(5.75,2.95){\makebox(0,0)[r]{y}}
- \end{picture}%
- \item
- Nulldurchgang einer Achse\\
- markiert eine Himmelsrichtung
- \item
- Vorzeichen der anderen Achse\\
- sagt aus, welche Himmelsrichtung
- \end{itemize}
- \vspace{-0.5cm}
- \begin{flushright}
- Beispiel: nach Norden ausrichten\\
- Grob drehen, bis $y$ positiv ist,
- fein drehen, bis $x = 0$ ist
- \end{flushright}
-% $x = 0$, $y$ positiv: Norden\\
-% $x = 0$, $y$ negativ: Süden
-% $y = 0$, $x < 0$: Westen
-% $y = 0$, $x > 0$: Osten
- \vspace*{-2cm}
-
-\end{frame}
-
-\fi
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}%
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \item[\textbf{4}] \textbf{Bus-Systeme}
- \begin{itemize}
- \color{medgreen}
- \item[5.1] Was sind Bus-Systeme?
- \item[5.2] RS-232
- \item[5.3] \ItwoC\ (TWI)
- \item[5.4] SPI
-% \item[5.5] Beispiel: Benutzung des \ItwoC-Busses
- \color{red}
- \item[5.5] PWM
- \end{itemize}
- \item[\textbf{6}] \textbf{Echtzeit}
- \begin{itemize}
- \color{red}
- \item[5.1] Was ist Echtzeit?
- \item[5.2] Echtzeitprogrammierung
- \item[5.3] Multitasking
- \item[5.4] Ressourcen
- \item[5.5] Prioritäten
- \end{itemize}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \underconstruction
- \end{itemize}
-
-\end{frame}
-
-\end{document}
diff --git a/20181122/kompass-messung.png b/20181122/kompass-messung.png
deleted file mode 120000
index 85cfa0d3840e7542ebb6dd2092be6c2a6e08fbb1..0000000000000000000000000000000000000000
--- a/20181122/kompass-messung.png
+++ /dev/null
@@ -1 +0,0 @@
-../common/kompass-messung.png
\ No newline at end of file
diff --git a/20181122/kompassmodul-an-roboter.jpg b/20181122/kompassmodul-an-roboter.jpg
deleted file mode 120000
index dab8b38c1a92bf8072d42dc3abcc07be54a58c7b..0000000000000000000000000000000000000000
--- a/20181122/kompassmodul-an-roboter.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/kompassmodul-an-roboter.jpg
\ No newline at end of file
diff --git a/20181122/kompassmodul.jpg b/20181122/kompassmodul.jpg
deleted file mode 120000
index be108a5341df13a693959dbe69b7b9541b36fc4c..0000000000000000000000000000000000000000
--- a/20181122/kompassmodul.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/kompassmodul.jpg
\ No newline at end of file
diff --git a/20181122/logo-hochschule-bochum-cvh-text-v2.pdf b/20181122/logo-hochschule-bochum-cvh-text-v2.pdf
deleted file mode 120000
index 4aa99b8f81061aca6dcaf43eed2d9efef40555f8..0000000000000000000000000000000000000000
--- a/20181122/logo-hochschule-bochum-cvh-text-v2.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum-cvh-text-v2.pdf
\ No newline at end of file
diff --git a/20181122/logo-hochschule-bochum.pdf b/20181122/logo-hochschule-bochum.pdf
deleted file mode 120000
index b6b9491e370e499c9276918182cdb82cb311bcd1..0000000000000000000000000000000000000000
--- a/20181122/logo-hochschule-bochum.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum.pdf
\ No newline at end of file
diff --git a/20181122/motherboard-anschluesse.jpg b/20181122/motherboard-anschluesse.jpg
deleted file mode 120000
index 07335d7dff65c71a683588d2ed108485c4653fb7..0000000000000000000000000000000000000000
--- a/20181122/motherboard-anschluesse.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/motherboard-anschluesse.jpg
\ No newline at end of file
diff --git a/20181122/pgslides.sty b/20181122/pgslides.sty
deleted file mode 120000
index 5be1416f4216f076aa268901f52a15d775e43f64..0000000000000000000000000000000000000000
--- a/20181122/pgslides.sty
+++ /dev/null
@@ -1 +0,0 @@
-../common/pgslides.sty
\ No newline at end of file
diff --git a/20181122/rs-232.pdf b/20181122/rs-232.pdf
deleted file mode 100644
index 236ef5bf182048842613c5416b91afb68f451fa6..0000000000000000000000000000000000000000
Binary files a/20181122/rs-232.pdf and /dev/null differ
diff --git a/20181122/tcpip-client-0.c b/20181122/tcpip-client-0.c
deleted file mode 100644
index 6c6d6d89daeeff447a7bb87aee5da2e162269167..0000000000000000000000000000000000000000
--- a/20181122/tcpip-client-0.c
+++ /dev/null
@@ -1,56 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <netdb.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-
-#define TARGET_HOST "ngc224.gerwinski.de"
-#define PORT 80
-#define COMMAND "GET /\r\n"
-
-void error (char *msg)
-{
- fprintf (stderr, "%s\n", msg);
- exit (1);
-}
-
-int main (void)
-{
- int s;
- struct sockaddr_in name;
- if ((s = socket (PF_INET, SOCK_STREAM, 0)) < 0)
- error ("cannot create socket");
- memset (&name, 0, sizeof (name));
- name.sin_family = AF_INET;
- name.sin_port = htons (PORT);
- name.sin_addr.s_addr = htonl (INADDR_ANY);
- struct hostent *ho = gethostbyname (TARGET_HOST);
- if (!ho)
- {
- close (s);
- error ("name server lookup error");
- }
- if (ho->h_length > (int) sizeof (name.sin_addr))
- ho->h_length = sizeof (name.sin_addr);
- memcpy (&name.sin_addr, ho->h_addr, ho->h_length);
- if (connect (s, (struct sockaddr *) &name, sizeof (name)) < 0)
- {
- close (s);
- error ("cannot connect to socket");
- }
- send (s, COMMAND, strlen (COMMAND), 0);
- ssize_t l;
- do
- {
- char buffer[100];
- l = recv (s, buffer, 100, 0);
- if (l > 0)
- write (1, buffer, l);
- }
- while (l > 0);
- shutdown (s, SHUT_RDWR);
- close (s);
- return 0;
-}
diff --git a/20181122/tcpip-client-1.cpp b/20181122/tcpip-client-1.cpp
deleted file mode 100644
index 9d7597a494b4c56e946b621b1daabb5f15726ec1..0000000000000000000000000000000000000000
--- a/20181122/tcpip-client-1.cpp
+++ /dev/null
@@ -1,49 +0,0 @@
-#include <boost/asio/io_service.hpp>
-#include <boost/asio/write.hpp>
-#include <boost/asio/buffer.hpp>
-#include <boost/asio/ip/tcp.hpp>
-#include <array>
-#include <string>
-#include <iostream>
-
-using namespace boost::asio;
-using namespace boost::asio::ip;
-
-io_service ioservice;
-tcp::resolver resolv{ioservice};
-tcp::socket tcp_socket{ioservice};
-std::array<char, 4096> bytes;
-
-void read_handler(const boost::system::error_code &ec,
- std::size_t bytes_transferred)
-{
- if (!ec)
- {
- std::cout.write(bytes.data(), bytes_transferred);
- tcp_socket.async_read_some(buffer(bytes), read_handler);
- }
-}
-
-void connect_handler(const boost::system::error_code &ec)
-{
- if (!ec)
- {
- std::string r = "GET /\n";
- write(tcp_socket, buffer(r));
- tcp_socket.async_read_some(buffer(bytes), read_handler);
- }
-}
-
-void resolve_handler(const boost::system::error_code &ec,
- tcp::resolver::iterator it)
-{
- if (!ec)
- tcp_socket.async_connect(*it, connect_handler);
-}
-
-int main()
-{
- tcp::resolver::query q{"ngc224.gerwinski.de", "80"};
- resolv.async_resolve(q, resolve_handler);
- ioservice.run();
-}
diff --git a/20181122/tcpip-server-0.c b/20181122/tcpip-server-0.c
deleted file mode 100644
index 868993c4ec429d02f5fe576af9ab57c807367ab6..0000000000000000000000000000000000000000
--- a/20181122/tcpip-server-0.c
+++ /dev/null
@@ -1,59 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <netdb.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-
-#define PORT 1234
-#define MESSAGE "Hello, world!\n"
-
-void error (char *msg)
-{
- fprintf (stderr, "%s\n", msg);
- exit (1);
-}
-
-int main (void)
-{
- int s;
- struct sockaddr_in name;
- if ((s = socket (PF_INET, SOCK_STREAM, 0)) < 0)
- error ("cannot create socket");
- memset (&name, 0, sizeof (name));
- name.sin_family = AF_INET;
- name.sin_port = htons (PORT);
- name.sin_addr.s_addr = htonl (INADDR_ANY);
- int on = 1;
- setsockopt (s, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof (on));
- if (bind (s, (struct sockaddr *) &name, sizeof (name)) < 0)
- {
- close (s);
- error ("cannot bind socket");
- }
- if (listen (s, 16) < 0)
- {
- close (s);
- error ("cannot listen on socket");
- }
- struct sockaddr_in clientname;
- socklen_t size = sizeof (clientname);
- s = accept (s, (struct sockaddr *) &clientname, &size);
- if (s < 0)
- error ("cannot accept connection");
- char *host_address = inet_ntoa (clientname.sin_addr);
- char *host_name;
- struct hostent *hp = gethostbyaddr ((void *) &clientname.sin_addr, sizeof (clientname.sin_addr), clientname.sin_family);
- if (hp)
- host_name = hp->h_name;
- else
- host_name = inet_ntoa (clientname.sin_addr);
- int remote_port = ntohs (clientname.sin_port);
- printf ("connection from %s [%s], port %d\n",
- host_name, host_address, remote_port);
- send (s, MESSAGE, strlen (MESSAGE), 0);
- shutdown (s, SHUT_RDWR);
- close (s);
- return 0;
-}
diff --git a/20181122/tcpip-server-1.cpp b/20181122/tcpip-server-1.cpp
deleted file mode 100644
index b2059c1d664a05b3581ac1f194ad203d0bca9401..0000000000000000000000000000000000000000
--- a/20181122/tcpip-server-1.cpp
+++ /dev/null
@@ -1,37 +0,0 @@
-#include <boost/asio/io_service.hpp>
-#include <boost/asio/write.hpp>
-#include <boost/asio/buffer.hpp>
-#include <boost/asio/ip/tcp.hpp>
-#include <string>
-
-using namespace boost::asio;
-using namespace boost::asio::ip;
-
-io_service ioservice;
-tcp::endpoint tcp_endpoint{tcp::v4(), 1234};
-tcp::acceptor tcp_acceptor{ioservice, tcp_endpoint};
-tcp::socket tcp_socket{ioservice};
-std::string data;
-
-void write_handler(const boost::system::error_code &ec,
- std::size_t bytes_transferred)
-{
- if (!ec)
- tcp_socket.shutdown(tcp::socket::shutdown_send);
-}
-
-void accept_handler(const boost::system::error_code &ec)
-{
- if (!ec)
- {
- std::string data = "Hello, world!\n";
- async_write(tcp_socket, buffer(data), write_handler);
- }
-}
-
-int main()
-{
- tcp_acceptor.listen();
- tcp_acceptor.async_accept(tcp_socket, accept_handler);
- ioservice.run();
-}
diff --git a/20181129/I2C_data_transfer.pdf b/20181129/I2C_data_transfer.pdf
deleted file mode 100644
index 0d5b8a241c624391cbf6f3a30f26320559358e1d..0000000000000000000000000000000000000000
Binary files a/20181129/I2C_data_transfer.pdf and /dev/null differ
diff --git a/20181129/Retribution_Engine_Screenshot_120807.jpg b/20181129/Retribution_Engine_Screenshot_120807.jpg
deleted file mode 120000
index 19f4cb3e4aae1e24c3466a25b2c0e5ad90ee49e7..0000000000000000000000000000000000000000
--- a/20181129/Retribution_Engine_Screenshot_120807.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/Retribution_Engine_Screenshot_120807.jpg
\ No newline at end of file
diff --git a/20181129/SPI_single_slave.pdf b/20181129/SPI_single_slave.pdf
deleted file mode 100644
index 6f724dad4a8ed23b262b0b1c672bf85b72405155..0000000000000000000000000000000000000000
Binary files a/20181129/SPI_single_slave.pdf and /dev/null differ
diff --git a/20181129/SPI_three_slaves.pdf b/20181129/SPI_three_slaves.pdf
deleted file mode 100644
index b67dc94c790a62935c7b353449e2ce8c75a7d9fe..0000000000000000000000000000000000000000
Binary files a/20181129/SPI_three_slaves.pdf and /dev/null differ
diff --git a/20181129/SPI_three_slaves_daisy_chained.pdf b/20181129/SPI_three_slaves_daisy_chained.pdf
deleted file mode 100644
index 46ac2027cfcbd598a609e43ce74e19e75d374ead..0000000000000000000000000000000000000000
Binary files a/20181129/SPI_three_slaves_daisy_chained.pdf and /dev/null differ
diff --git a/20181129/Telefon_t-sinus-700.jpg b/20181129/Telefon_t-sinus-700.jpg
deleted file mode 120000
index 27c322c50b0f05edc8b07cfb0cc99b1876eb506d..0000000000000000000000000000000000000000
--- a/20181129/Telefon_t-sinus-700.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/Telefon_t-sinus-700.jpg
\ No newline at end of file
diff --git a/20181129/Zeichen_123.pdf b/20181129/Zeichen_123.pdf
deleted file mode 120000
index fdbc897227df059cfda790a16555e6e417682116..0000000000000000000000000000000000000000
--- a/20181129/Zeichen_123.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/Zeichen_123.pdf
\ No newline at end of file
diff --git a/20181129/a380.jpg b/20181129/a380.jpg
deleted file mode 120000
index 33a5d1fd18843bf7385e5a6d90f69af9fd8720da..0000000000000000000000000000000000000000
--- a/20181129/a380.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/a380.jpg
\ No newline at end of file
diff --git a/20181129/curiosity.jpg b/20181129/curiosity.jpg
deleted file mode 120000
index 4452844da537414b751c5283ca8468b3ced9afb3..0000000000000000000000000000000000000000
--- a/20181129/curiosity.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/curiosity.jpg
\ No newline at end of file
diff --git a/20181129/dsc_8208.jpg b/20181129/dsc_8208.jpg
deleted file mode 120000
index 5796341ebc774aa09965a3a29854c65ce1144fb8..0000000000000000000000000000000000000000
--- a/20181129/dsc_8208.jpg
+++ /dev/null
@@ -1 +0,0 @@
-../common/dsc_8208.jpg
\ No newline at end of file
diff --git a/20181129/es-20181129.pdf b/20181129/es-20181129.pdf
deleted file mode 100644
index b334aa28de6024a62409125e538013e0ca26edfd..0000000000000000000000000000000000000000
Binary files a/20181129/es-20181129.pdf and /dev/null differ
diff --git a/20181129/es-20181129.tex b/20181129/es-20181129.tex
deleted file mode 100644
index 889c88afc705da67bc6647c8f4f81a7098588534..0000000000000000000000000000000000000000
--- a/20181129/es-20181129.tex
+++ /dev/null
@@ -1,2194 +0,0 @@
-% es-20181129.pdf - Lecture Slides on Embedded Systems
-% Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-% README: Bus-Systeme; Echtzeit
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{rotating}
-\usepackage{tikz}
-\usepackage[obeyfamily=false,mathrm=mathsf,textrm=sffamily]{siunitx}
-
-\newrgbcolor{lightyellow}{0.95 0.85 0.0}
-\newrgbcolor{lightorange}{1.0 0.7 0.0}
-\newrgbcolor{lightgreen}{0.0 0.8 0.0}
-
-\newcommand{\underconstruction}{%
- \begin{picture}(0,0)
- \put(9,0.9){\makebox(0,0)[b]{\includegraphics[width=1.5cm]{Zeichen_123.pdf}}}
- \put(9,0.6){\makebox(0,0)[t]{\shortstack{Änderungen\\vorbehalten}}}
- \end{picture}}
-
-\title{Eingebettete Systeme}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{29.\ November 2018}
-
-\newcommand{\ItwoC}{I\raisebox{0.5ex}{\footnotesize 2}C}
-
-\begin{document}
-
-\newlength{\normalpdfpageheight}
-\setlength{\normalpdfpageheight}{\pdfpageheight}
-
-\maketitleframe
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \begin{itemize}
- \color{medgreen}
- \vspace*{-\smallskipamount}
- \item[\dots]
- \color{medgreen}
- \item[3.6] SSH
- \item[3.7] X11
- \item[3.8] GNU screen
- \item[3.9] Programmierung
- \end{itemize}
- \item[\textbf{4}] \textbf{Bus-Systeme}
- \begin{itemize}
- \color{medgreen}
- \item[5.1] Was sind Bus-Systeme?
- \item[5.2] RS-232
- \item[5.3] \ItwoC\ (TWI)
- \item[5.4] SPI
- \color{red}
- \item[5.5] PWM
- \item[5.6] Sonstiges
- \end{itemize}
- \item[\textbf{6}] \textbf{Echtzeit}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\setcounter{section}{2}
-\section{TCP/IP in der Praxis}
-\setcounter{subsection}{5}
-\subsection{SSH}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \lstinline[style=cmd]{SSH <Rechner>}
- \item
- \lstinline[style=cmd]{-C}: Komprimierung
- \item
- \lstinline[style=cmd]{-L}: lokalen Port auf Remote-Port umleiten
- \item
- \lstinline[style=cmd]{-R}: Remote-Port auf lokalen Port umleiten
- \end{itemize}
-
-\end{frame}
-
-\subsection{X11}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Grafik-Bildschirm und Eingabegeräte über's Netz
- \item
- \lstinline[style=cmd]{DISPLAY}-Variable: X-Server: Rechner und Bildschirm
- \item
- \lstinline[style=cmd]{ssh -X}: X11-Forwarding
- \end{itemize}
-
-\end{frame}
-
-\subsection{GNU screen}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- Text-Bildschirm und Eingabegeräte über's Netz
- \item
- \lstinline[style=cmd]{Ctrl+A c}: neues Fenster (create)
- \item
- \lstinline[style=cmd]{Ctrl+A Leertaste}: nächstes Fenster
- \item
- \lstinline[style=cmd]{Ctrl+A 3}: Fenster Nr.\ 3
- \item
- \lstinline[style=cmd]{Ctrl+A ESC}: hochscrollen, suchen, markieren (copy)
- \item
- \lstinline[style=cmd]{Ctrl+A Ctrl+]}: einfügen (paste)
- \item
- \lstinline[style=cmd]{Ctrl+A d}: von \file{screen} ablösen (detach)
- \item
- \lstinline[style=cmd]{screen -x}: an laufenden \file{screen} andocken
- \medskip
- \item
- ähnliche Funktionalität für Grafik: \file{x2go}
- \end{itemize}
-
-\end{frame}
-
-\subsection{Programmierung}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \file{tcpip-server-0.c}: auf Port 1234 lauschen, "`Hello, world!"' senden
- \item
- \file{tcpip-client-0.c}: Webseite \url{http://ngc224.gerwinski.de} abrufen
- \end{itemize}
-
-\end{frame}
-
-\section{Bus-Systeme}
-\subsection{Was sind Bus-Systeme?}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{quote}
- Ein Bus ist ein System zur Datenübertragung zwischen mehreren
- Teilnehmern über einen gemeinsamen Übertragungsweg.
-% \color{gray}
-% Findet eine Datenübertragung zwischen zwei Teilnehmern statt, so
-% müssen die übrigen Teilnehmer schweigen, da sie sich sonst
-% gegenseitig stören würden. Umgangssprachlich werden mitunter --
-% oft aus historischen Gründen – auch Datenübertragungssysteme als
-% "`Bus"' bezeichnet, die technisch eigentlich eine andere
-% Topologie besitzen.
-
- \medskip
-
- \strut\hfill\url{https://de.wikipedia.org/wiki/Bus_(Datenverarbeitung)}
- \end{quote}
- Beispiele:
- \begin{itemize}
- \item
- Computer kommuniziert mit Peripherie
- \item
- Computer kommunizieren (direkt) miteinander
- \item
- Prozessor kommuniziert mit externem Speicher
- \item
- Teile eines Prozessors kommunizieren miteinander
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
- Standard-Computer:
- \begin{itemize}
- \item
- Einsteckkarten: PCI (und Vorgänger)
- \item
- Festplatten: SATA (und Vorgänger)
- \item
- USB, FireWire, \dots
- \item
- Ethernet, CAN-Bus, \dots
- \item
- WLAN, BlueTooth, IR, \dots
- \item
- PS/2, RS-232, Centronics
- \end{itemize}
-
- \medskip
-
- Minimal-Hardware:
- \begin{itemize}
- \item
- RS-232
- \item
- \ItwoC\ (TWI)
- \item
- SPI
- \end{itemize}
-
- \begin{onlyenv}<1>
- \begin{picture}(0,0)
- \put(5,1.5){\includegraphics[height=3cm]{motherboard-anschluesse.jpg}}
- \end{picture}
- \end{onlyenv}
- \begin{onlyenv}<2>
- \begin{picture}(0,0)(-1.3,-4)
- \put(1.8,-4.9){\includegraphics[height=3.5cm]{kompassmodul-an-roboter.jpg}}
- \put(6.1,-3.3){\includegraphics[height=4.5cm]{kompassmodul.jpg}}
- \put(6.1,1.2){\makebox(0,0)[tr]{\tikz{\draw(0,0)--(-1.9,-3.6);}}}
- \put(6.1,-3.3){\makebox(0,0)[br]{\tikz{\draw(0,0)--(-1.8,0.2);}}}
- \end{picture}
- \end{onlyenv}
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsection
- \showsubsection
-
- \vspace*{-\bigskipamount}
- \begin{tabbing}
- \newterm{Punkt-zu-Punkt}\quad\=\kill
- \newterm{seriell} \> jedes Bit einzeln übertragen\\
- \newterm{parallel} \> mehrere Bits gleichzeitig\\[\smallskipamount]
- \newterm{synchron} \> Abgleich über Steuerleitung: \newterm{Takt}\\
- \newterm{asynchron} \> Abgleich über Zeitvereinbarungen\\[\smallskipamount]
- \newterm{Punkt-zu-Punkt} \> genau zwei Teilnehmer\\
- \newterm{busfähig} \> mehrere Teilnehmer, mit \newterm{Adressierung}
- \end{tabbing}
-
- \begin{itemize}
- \item
- \ItwoC: seriell, synchron, mit Adressierung
- \item
- RS-232: seriell, asynchron, Punkt-zu-Punkt
- \item
- RS-485, USB, CAN: seriell, asynchron, mit Adressierung
- \item
- SPI: seriell, synchron, Punkt-zu-Punkt oder mit Adressierung
- \end{itemize}
-
-\end{frame}
-
-\subsection{RS-232}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- seriell
- \begin{itemize}
- \item
- \newterm{TX\/}: 1 Leitung für Daten
- \item
- \newterm{RX\/}: ggf.\ 1 Leitung für Daten in der anderen Richtung
- \item
- \newterm{GND\/}: gemeinsame \newterm{Masse}
- \item
- evtl.\ zusätzliche Steuerleitungen
- \end{itemize}
-
- \medskip
-
- asynchron
- \begin{itemize}
- \item
- \emph{keine\/} Taktleitung für Abgleich, wann Daten anliegen
- \item
- Stattdessen: Abgleich über Zeitvereinbarungen
- \arrowitem
- Jeder Teilnehmer braucht eine eigene Zeitbasis.
- \end{itemize}
-
- \medskip
-
- Punkt-zu-Punkt
- \begin{itemize}
- \item
- nur 2 Teilnehmer vorgesehen
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \showsubsection
- \vspace*{-0.35cm}
- \begin{center}
- \includegraphics[scale=0.9]{rs-232.pdf}
- \end{center}
-\end{frame}
-
-\subsection{\protect\ItwoC\ (TWI)}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \ItwoC\ = Inter-IC; TWI = Two-Wire-Interface
-
- \medskip
-
- seriell
- \begin{itemize}
- \item
- \newterm{SDA\/}: 1 Leitung für Daten (in beiden Richtungen)
- \item
- \newterm{SCL\/}: Taktleitung (Clock)
- \item
- \newterm{GND\/}: gemeinsame Masse
- \item
- evtl.\ \newterm{VCC\/}: Stromversorgung für Peripheriegerät
- \end{itemize}
-
- \medskip
-
- synchron
- \begin{itemize}
- \item
- Abgleich über\\Taktleitung
- \begin{picture}(0,0)
- \put(0.4,-0.4){\includegraphics[width=9.7cm]{I2C_data_transfer.pdf}}
- \end{picture}
- \end{itemize}
-
- \medskip
-
- busfähig
- \begin{itemize}
- \item
- \newterm{Master\/} initiiert Kommuniation und steuert Taktleitung
- \item
- erstes gesendetes Byte: \newterm{Adresse\/} des Teilnehmers
- \item
- 2 Adressen pro Teilnehmer: Lesen/Schreiben
- \end{itemize}
- \vspace*{-1cm}
-\end{frame}
-
-\subsection{SPI}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Serial Peripheral Interface
-
- \medskip
-
- seriell
- \begin{itemize}
- \item
- \newterm{MOSI\/}: Master Out, Slave In
- \item
- \newterm{MISO\/}: Master In, Slave Out
- \item
- \newterm{SCLK\/}: Taktleitung (Clock)
- \item
- \newterm{$\overline{\text{SS}}$\/}: Slave Select (invertiert)
- \item
- \newterm{GND\/}: gemeinsame Masse
- \item
- evtl.\ \newterm{VCC\/}: Stromversorgung für Peripheriegerät
- \end{itemize}
-
- \medskip
-
- synchron
- \begin{itemize}
- \item
- Abgleich über Taktleitung
- \end{itemize}
-
- \medskip
-
- busfähig
- \begin{itemize}
- \item
- \newterm{Master\/} initiiert Kommuniation und steuert Taktleitung
- \item
- \newterm{Slave\/} wird über \newterm{Slave Select\/} ausgewählt
- \begin{picture}(0,0)(0,-0.2)
- \only<1>{\put(-2.175,2.875){\includegraphics[scale=0.7]{SPI_single_slave.pdf}}}
- \only<2>{\put(-2.0,3.0){\includegraphics[scale=0.7]{SPI_three_slaves.pdf}}}
- \only<2>{\put(2.55,3.1){\begin{minipage}[t]{2.5cm}
- \newterm{Stern}
- \end{minipage}}}
- \only<3->{\put(-2.0,3.0){\includegraphics[scale=0.7]{SPI_three_slaves_daisy_chained.pdf}}}
- \only<3->{\put(2.55,3.1){\begin{minipage}[t]{2.5cm}
- \newterm{Kaskade}\\
- \newterm{Daisy Chain}\pause[4]\par\smallskip
- \setlength{\leftskip}{-3.5cm}\small
- Slave gibt MOSI-Input um 1 Takt verzögert
- an MISO aus \textarrow\ Master setzt
- "`im richtigen Moment"' $\overline{\text{SS}}$
- \end{minipage}}}
- \end{picture}
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\subsection{PWM}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Pulsweitenmodulation -- \emph{pulse-width modulation}
-
- \begin{itemize}
- \item
- Steuerung von Motoren
- \item
- Nutzung als allgemeines Protokoll\\
- zur Übertragung analoger Werte
- \end{itemize}
-\end{frame}
-
-\subsection{Sonstiges}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Matrix-Schaltung
- \begin{itemize}
- \item
- möglichst viele Aktoren/Sensoren\\
- über möglichst wenige digitals Inputs abfragen\\
- bzw.\ über möglichst wenige digitale Outputs steuern
- \item
- Beispiele: LED-Felder, Tastaturen
- \end{itemize}
-
- \bigskip
-
- R/2R-Netzwerk
- \begin{itemize}
- \item
- möglichst viele digitale Inputs\\
- über einen einzigen analogen Input abfragen
- \item
- Beispiele: Tastaturen
- \end{itemize}
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}%
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \item[\textbf{4}] \textbf{Bus-Systeme}
- \begin{itemize}
- \color{medgreen}
- \item[5.1] Was sind Bus-Systeme?
- \item[5.2] RS-232
- \item[5.3] \ItwoC\ (TWI)
- \item[5.4] SPI
-% \item[5.5] Beispiel: Benutzung des \ItwoC-Busses
- \color{medgreen}
- \item[5.5] PWM
- \item[5.6] Sonstiges
- \end{itemize}
- \item[\textbf{6}] \textbf{Echtzeit}
- \begin{itemize}
- \color{red}
- \item[5.1] Was ist Echtzeit?
- \item[5.2] Echtzeitprogrammierung
- \item[5.3] Multitasking
- \item[5.4] Ressourcen
- \item[5.5] Prioritäten
- \end{itemize}
- \vspace*{-\medskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\section{Echtzeit}
-
-\subsection{Was ist Echtzeit?}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- \begin{itemize}
- \pause
- \item
- Animation in Echtzeit:\\
- schnelle Berechnung anstatt Wiedergabe einer Aufzeichnung
- \pause
- \medskip
- \item
- Fantasy-Rollenspiel in Echtzeit:\\
- Der Zeitverlauf der Spielwelt entspricht dem der realen Welt.
- \pause
- \medskip
- \item
- Datenverarbeitung in Echtzeit:\\
- Die Daten werden so schnell verarbeitet, wie sie anfallen.
- \pause
- \medskip
- \item
- speziell: Echtzeit-Steuerung von Maschinen:\\
- Die Berechnung kann mit den physikalischen Vorgängen schritthalten.
- \pause
- \bigskip
- \arrowitem
- "`Schnell genug."'
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- "`Schnell genug."' \pause-- "`Und wenn nicht?"'
-
- \pause
-
- \begin{itemize}
- \item
- "`Ganz schlecht."' \pause\textarrow\ \newterm{harte Echtzeit}
- \begin{onlyenv}<4-8>
- \begin{picture}(0,0)(0,-0.3)
- \pause
- \put(0,-4){\makebox(0,0)[br]{\includegraphics[height=3.5cm]{a380.jpg}}}
- % http://de.wikipedia.org/w/index.php?title=Datei:Airbus_A380_overfly.jpg&filetimestamp=20111223141606
- \pause
- \put(0.2,-3.9){\makebox(0,0)[bl]{\includegraphics[height=4.0cm]{quadrocopter.jpg}}}
- %\put(0.2,-3.5){\makebox(0,0)[bl]{\includegraphics[height=3.5cm]{mercedes-benz-w116.jpg}}}
- % http://commons.wikimedia.org/wiki/File:1973-1980_Mercedes-Benz_450_SEL_%28W116%29_sedan_%282010-12-28%29_01.jpg
- \pause
- \put(-0.5,-4.2){\makebox(0,0)[tr]{\includegraphics[height=3.5cm]{herzschrittmacher.jpg}}}
- % http://de.wikipedia.org/w/index.php?title=Datei:Pacemaker_GuidantMeridianSR.jpg&filetimestamp=20051203173642
- \pause
- \put(0,-4){\makebox(0,0)[tl]{\includegraphics[height=3.5cm]{curiosity.jpg}}}
- % http://mars.jpl.nasa.gov/msl/news/whatsnew/index.cfm?FuseAction=ShowNews&NewsID=1344
- \end{picture}
- \end{onlyenv}
- \pause\\[2pt]
- rechtzeitiges Ergebnis funktionsentscheidend
-
- \smallskip
-
- \pause
- \item
- "`Unschön."' \textarrow\ \newterm{weiche Echtzeit}
- \begin{onlyenv}<10-12>
- \begin{picture}(0,0)(0,0.3)
- \pause
- \put(0,-4){\makebox(0,0)[br]{\includegraphics[width=5cm]{Retribution_Engine_Screenshot_120807.jpg}}}
- % http://en.wikipedia.org/wiki/File:Retribution_Engine_Screenshot_120807.jpg
- \pause
- \put(0.1,-4.5){\makebox(0,0)[bl]{\includegraphics[width=5cm]{Telefon_t-sinus-700.jpg}}}
- % http://de.wikipedia.org/w/index.php?title=Datei:Telefon_t-sinus-700.jpg&filetimestamp=20050807203655
- \end{picture}
- \end{onlyenv}
- \pause\\[2pt]
- verspätetes Ergebnis qualitätsmindernd
- \begin{itemize}
- \baselineskip14pt\par
- \item
- verwenden und Verzögerung in Kauf nehmen
- \item
- verwerfen und Ausfall in Kauf nehmen
- \end{itemize}
-
- \smallskip
-
- \pause
- \item
- "`Es gibt keinen festen Termin. Möglichst schnell halt."'\pause\\[2pt]
- \textarrow\ \newterm{keine Echtzeit}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- Das Problem:
- \vspace{-\bigskipamount}
- \begin{center}
- \begin{picture}(6,2)
- \put(3,2){\makebox(0,0)[t]{Harte Echtzeitanforderungen}}
- \put(3,0){\makebox(0,0)[b]{Ressourcen optimal nutzen}}
-% \put(2.75,0.875){\vector(1,3){0.25}}
-% \put(2.75,0.875){\line(2,1){0.5}}
-% \put(3.25,1.125){\vector(-1,-3){0.25}}
- \put(2.70,0.350){\tikz{\draw[latex-latex](0.25,0.625)--(0,-0.12)--(0.5,0.12)--(0.25,-0.625);}}
- \end{picture}
-% \begin{pdfpic}
-% \begin{pspicture}(6,2)
-% \put(3,2){\makebox(0,0)[t]{Harte Echtzeitanforderungen}}
-% \put(3,0){\makebox(0,0)[b]{Ressourcen optimal nutzen}}
-% \psline[arrows=<->](3,0.4)(3.2,1.125)(2.8,0.875)(3,1.6)
-% \end{pspicture}
-% \end{pdfpic}
- \end{center}
-
- \pause
-
- Beispiel:
- \begin{itemize}
- \item
- Eine Motorsteuerung benötigt alle \SI{2000}{\mics} einen Steuerimpuls,\\
- dessen Berechnung maximal \SI{10}{\mics} dauert.
- \pause[3]
- \item
- Entweder: Der Steuer-Computer macht noch andere Dinge.\\
- \textarrow\ Risiko der Zeitüberschreitung
- \pause
- \item
- Oder: Der Steuer-Computer macht nichts anderes.\\
- \textarrow\ Verschwendung von Rechenzeit\\
- \pause
- {\color{red}\textarrow\ Na und?}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \showsubsection
-
- Das Problem:
- \vspace{-\bigskipamount}
- \begin{center}
- \begin{picture}(6,2)
- \put(3,2){\makebox(0,0)[t]{Harte Echtzeitanforderungen}}
- \put(3,0){\makebox(0,0)[b]{Ressourcen optimal nutzen}}
-% \put(2.75,0.875){\vector(1,3){0.25}}
-% \put(2.75,0.875){\line(2,1){0.5}}
-% \put(3.25,1.125){\vector(-1,-3){0.25}}
- \put(2.70,0.350){\tikz{\draw[latex-latex](0.25,0.625)--(0,-0.12)--(0.5,0.12)--(0.25,-0.625);}}
- \end{picture}
-% \begin{pdfpic}
-% \begin{pspicture}(6,2)
-% \put(3,2){\makebox(0,0)[t]{Harte Echtzeitanforderungen}}
-% \put(3,0){\makebox(0,0)[b]{Ressourcen optimal nutzen}}
-% \psline[arrows=<->](3,0.4)(3.2,1.125)(2.8,0.875)(3,1.6)
-% \end{pspicture}
-% \end{pdfpic}
- \end{center}
-
- \medskip
-
- {\large\color{structure}\textbf{"`Verschwendung von Rechenzeit -- na und?"'}}
-
- \medskip
-
- \pause
- Große Stückzahlen
- \begin{itemize}
- \item
- 138\,000 Toyota Prius V von Mai 2011 bis April 2012
- \end{itemize}
-
- \medskip
-
- \pause
- Wertvolle Ressourcen
- \begin{itemize}
- \item
- Fähigkeiten einer Raumsonde optimieren
- % (Marsumlaufbahn: ab ca.~127\,000 Euro pro kg)
- % 70000000 / 550000 = 127._27
- % http://www.bernd-leitenberger.de/blog/2009/09/29/reduktion-der-kosten-von-planetenmissionen/
- \only<.(1)>{\\[\medskipamount]\strut\hfill\makebox(0,0)[r]{\includegraphics[height=3.3cm]{curiosity.jpg}}\vspace*{-1cm}}
- \pause
- \item
- Implantat: Platz- und Stromverbrauch minimieren
- \only<.(1)>{\\\strut\hfill\makebox(0,0)[r]{\includegraphics[height=3.4cm]{herzschrittmacher.jpg}}\vspace*{-1cm}}
- \end{itemize}
-
- \bigskip
-
- \pause
- \textarrow\ {\large\color{structure}\textbf{Echtzeitprogrammierung}}\\[2pt]
- \strut \phantom{\textarrow} Echtzeitanforderungen erfüllen, ohne Ressourcen zu verschwenden
-
-\end{frame}
-
-\subsection{Echtzeitprogrammierung}
-
-\begin{frame}
-
- \showsubsection
-
- Echtzeitanforderungen erfüllen, ohne Ressourcen zu verschwenden
-
- \bigskip
-
- \alt<.(1)>{Aber wie?}{Beispiele für Lösungen:}
-
- \begin{itemize}
- \pause
- \item
- ZigBee-Modul:\only<.(1)>{\hfill\makebox(0,0)[tr]{\includegraphics[width=5cm]{xbee.jpg}}}\\
- % http://commons.wikimedia.org/wiki/File:Arduino_xbee.JPG
- Funk- vs.\ UART-Protokoll\\
- \textarrow\ dedizierte Hardware
- \pause
- \item
- RP6:\\
- Motorsteuerung vs.\ Anwender-Software\\
- \textarrow\ spezielle Software
- \only<.(1)>{\hfill\makebox(0,0)[r]{\includegraphics[width=5cm]{rp6.jpg}}}
- \pause
- \item
- Quadrocopter:\\
- Motorsteuerung vs.\ Sensoren-Abfrage\\
- vs.\ Funk-Fernsteuerung \dots\\
- \textarrow\ spezielle Software
- \only<.(1)>{\hfill\makebox(0,0)[br]{\includegraphics[width=5cm]{quadrocopter.jpg}}}\\
- \pause
- \item
- Flugzeugkabinensimulatortür:\\
- Türsteuerung vs.\ Bedienung\\
- \textarrow\ Echtzeitbetriebssystem
- \only<.(1)>{\\[-3.2cm]\strut\hfill\makebox(0,0)[r]{\includegraphics[angle=-90,width=5cm]{dsc_8208.jpg}}}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
-
- \showsubsection
-
- Quadrocopter-Steuerung \emph{MultiWii}
- \begin{itemize}
- \item
- Konfiguration durch bedingte Compilierung (Präprozessor)
- \item
- In der Hauptschleife wird 50mal pro Sekunde der RC-Task aufgerufen,\\
- ansonsten zyklisch einer von bis zu 5 weiteren Tasks.
- \end{itemize}
-
- \pause
-
- RP6-Steuerung
- \begin{itemize}
- \item
- Konfiguration durch bedingte Compilierung (Präprozessor)
- \item
- Lichtschranken an Encoder-Scheiben lösen bei Bewegung Interrupts aus.\\
- Die Interrupt-Handler zählen Variable hoch.
- \item
- 10000mal pro Sekunde: Timer-Interrupt\\
- Durch Zähler im Interrupt-Handler: verschiedene Taktraten\\
- 1000mal pro Sekunde: Stopwatches\\
- 5mal pro Sekunde: Blinkende Power-On-LED\\
- 1000mal pro Sekunde: Bumper, ACS, PWM zur Motorsteuerung\\
- Geschwindigkeitsmessung durch Zählen der Ticks in 0.2\,s\\
- Anpassung der Motorkraft in $\pm$1-Schritten
- \pause
- \item
- Nebenbei: \only<4->{1 }Benutzerprogramm
- \end{itemize}
-
-\end{frame}
-
-\subsection{Multitasking}
-
-\begin{frame}
-
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{Kooperatives Multitasking}\\
- Prozesse geben freiwillig Rechenzeit ab
- \item
- \newterm{Präemptives Multitasking}\\
- Das Betriebssystem unterbricht laufende Prozesse\\
- (englisch: \emph{to pre-empt\/} -- jemandem zuvorkommen)
- \bigskip
- \item
- \newterm{Scheduler}\\
- Steuerprogramm, das Prozessen Rechenzeit zuteilt
- \item
- \newterm{Kontextwechsel}\\
- Umschalten zwischen zwei Prozessen
- \item
- \newterm{Round-Robin-Verfahren (Rundlauf)}\\
- Zuteilung von \newterm{Zeitschlitzen\/} auf einer \newterm{Zeitscheibe} an die Prozesse
- \bigskip
- \pause
- \item
- Ausblick: Zuteilung von Rechenzeit = wichtiger Spezialfall\\
- allgemein: Zuteilung von Ressourcen
- \end{itemize}
-
-\end{frame}
-
-\subsectionnonumber{Beispiele für Multitasking}
-
-\begin{frame}
-
- \showsubsectionnonumber
-
- Quadrocopter-Steuerung \emph{MultiWii}
- \begin{itemize}
- \item
- Konfiguration durch bedingte Compilierung (Präprozessor)
- \item
- In der Hauptschleife wird 50mal pro Sekunde der RC-Task aufgerufen,\\
- ansonsten zyklisch einer von bis zu 5 weiteren Tasks.
- \end{itemize}
-
- RP6-Steuerung
- \begin{itemize}
- \item
- Konfiguration durch bedingte Compilierung (Präprozessor)
- \item
- Lichtschranken an Encoder-Scheiben lösen bei Bewegung Interrupts aus.\\
- Die Interrupt-Handler zählen Variable hoch.
- \item
- 10000mal pro Sekunde: Timer-Interrupt\\
- verschiedene Tasks werden unterschiedlich häufig aufgerufen
- \item
- Nebenbei: 1 Benutzerprogramm
- \end{itemize}
-
- Linux 0.01
- \begin{itemize}
- \item
- Timer-Interrupt:\only<2->{ Zähler des aktuellen Tasks wird dekrementiert;}\\
- Task mit höchstem Zähler bekommt Rechenzeit.
- \item
- Wenn es keinen laufbereiten Task mit positivem Zähler gibt,\\
- bekommen alle Tasks gemäß ihrer Priorität neue Zähler zugewiesen.
- \item
- \emph{keine\/} harte Echtzeit
- % Aufgabe: Wo wird der Zähler heruntergezählt?
- \end{itemize}
-
-\end{frame}
-
-\subsectionnonumber{Zombies}
-
-\begin{frame}
-
- \showsubsectionnonumber
-
- \pause
- Wikipedia:
- \begin{quote}
- Als Zombie wird die fiktive Figur eines zum Leben erweckten
- Toten (Untoter) oder eines seiner Seele beraubten, willenlosen
- Wesens bezeichnet. Der Begriff leitet sich von dem Wort nzùmbe
- aus der zentralafrikanischen Sprache Kimbundu ab und bezeichnet
- dort ursprünglich einen Totengeist.
- \end{quote}
-
- \bigskip
-
- \pause
- Ein Zombie-Prozeß ist bereits beendet ("`tot"'),\\
- bekommt keine Rechenzeit mehr ("`seiner Seele beraubt"'),\\
- hat alle belegten Ressourcen wieder freigegeben ("`willenlos"'),\\
- wird aber noch in der Prozeßliste geführt ("`untot"').
- \begin{itemize}
- \pause
- \item
- Warum?
- \textarrow\
- Ein anderer Prozeß (Elternprozeß) wartet noch auf den
- Rückgabewert des beendeten Prozesses.
- \pause
- \item
- Schadet das?
- \textarrow\
- Nein.
- \pause
- \item
- Aber?
- \textarrow\
- Wenn sich Zombie-Prozesse anhäufen, deutet dies auf einen
- Prozeß hin, der andere Prozesse erzeugt und anschließend "`hängt"'.
- \pause
- \item
- Beispiel:
- Datenträger entfernt, zugreifender Prozeß "`hängt"'.\\
- \textarrow\
- Tochterprozesse werden zu Zombies.
- \end{itemize}
-
-\end{frame}
-
-\subsectionnonumber{Multitasking}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- \begin{minipage}[t]{6cm}
- Qualitätsaspekte beim Multitasking
- \begin{itemize}
- \item<2->
- Verschiedene Anforderungen:
- \newterm{Latenz\/} vs.\ \newterm{Jitter\/}\\
- vs.\ \newterm{Durchsatz}
- \smallskip
- \begin{onlyenv}<3>
- \begin{itemize}
- \item
- \newterm{Latenz:} interaktive Anwendungen
- \item
- \newterm{Jitter:} Echtzeitanwendungen
- \item
- \newterm{Durchsatz:} Stapelverarbeitung
- \end{itemize}
- \vspace*{-3cm}
- \end{onlyenv}
- \item<4->
- Ressourcen reservieren:\\
- \newterm{Mutexe}
- \only<5->{(= spezielle \newterm{Semaphore\/})\\}
- \only<6->{\textarrow\ kommt gleich}
- \item<7->
- Verschiedene Methoden\\
- der Priorisierung\\
- \textarrow\ später\\
- \strut
- \item<8->
- Umgehung der Probleme durch
- speziell geschriebene Software\\
- (MultiWii, RP6, \dots)
- \end{itemize}
- \end{minipage}
- \hfill
- \pause[9]%
- \begin{minipage}[t]{6.2cm}
- Qualitätsaspekte für Netzwerke:
- \begin{itemize}
- \item
- Verschiedene Anforderungen:
- \newterm{Latenz\/} vs.\ \newterm{Jitter\/} vs.\ \newterm{Verluste\/}\\vs.\ \newterm{Durchsatz}
- \item
- Ressourcen reservieren:\\
- \newterm{IntServ} mit \newterm{Resource Reservation Protocol (RSVP)}
- \item
- Klassifizierung und Priorisierung:
- \newterm{DiffServ} mit Type-of-Service-Bits (IPv4)
- bzw.\ Traffic-Class-Bits (IPv6) im IP-Header
- \item
- Eigenes Protokoll (Telefondienste):\\
- \newterm{Asynchronous Transfer Mode (ATM)}
- \end{itemize}
- \end{minipage}
-
-\end{frame}
-
-\subsection{Ressourcen}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Ressourcen reservieren
- \begin{itemize}
- \item
- \newterm{Semaphor}\\
- gemeinsame Variable mehrerer Prozesse\\
- zur Regelung des Zugriffs auf eine Ressource\\[\smallskipamount]
- Ressource belegt \textarrow\ Kontextwechsel
- \begin{onlyenv}<1>
- \par\medskip
- griechisch: \emph{sema\/} -- Zeichen, \emph{pherein\/} -- tragen\\
- "`Eisenbahnsignal"'
- \vspace*{-3cm}
- \end{onlyenv}
- \pause
- \medskip
- \item
- \newterm{Mutex}\\
- Mechanismus, damit immer nur ein Prozeß gleichzeitig\\
- auf eine Ressource zugreifen kann
- \begin{onlyenv}<2>
- \par\medskip
- englisch: \emph{mutual exclusion\/} -- wechselseitiger Ausschluß\\
- spezieller binärer Semaphor: nur "`Besitzer"' darf freigeben\\
- % allgemein: auch jemand anderer dürfte freigeben
- \vspace*{-3cm}
- \end{onlyenv}
- \pause
- \medskip
- \item
- \newterm{Spinlock} (\emph{busy waiting\/})\\
- leichtgewichtige Alternative zu Kontextwechsel
- \begin{onlyenv}<3>
- \par\medskip
- englisch: \emph{spin\/} -- rotieren, \emph{lock\/} Sperre\\
- \emph{busy waiting} auf etwas Schnelles, z.\,B.\ auf einen Semaphor\\[\medskipamount]
- Hardware-Unterstützung:
- Prüfen, ob Variable bestimmten Wert hat;\\
- wenn ja, auf anderen Wert setzen; andere Prozessoren solange anhalten
- \vspace*{-3cm}
- \end{onlyenv}
- \pause
- \medskip
- \item
- \newterm{Kritischer Abschnitt -- critical section}\\
- Programmabschnitt zwischen Reservierung\\
- und Freigabe einer Ressource\\
- \textarrow\ sollte immer so kurz wie möglich sein
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Ressourcen reservieren --
- Beispiel: \file{linux-3.7rc1}
- \begin{itemize}
- \item
- \newterm{Semaphor}\\
- \file{kernel/semaphor.c}\\
- \file{drivers/usb/core/file.c}
- \medskip
- \item
- \newterm{Mutex}\\
- \file{kernel/mutex.c}\\
- \file{drivers/usb/serial/usb-serial.c}
- \medskip
- \item
- \newterm{Spinlock}\\
- \file{kernel/spinlock.c}\\
- \file{kernel/semaphor.c},
- \file{kernel/mutex.c}
- \end{itemize}
-
- % Aufgabe: Anwendungsarten im MultiWii- und RP6-Code identifizieren
-
- % evtl. Aufgabe: Warte-Problem
-
- % Aufgabe: Wie lösen bekannte Multitasking-Betriebssysteme
- % das o.a. Zuteilungsproblem?
-
- % Danach: Semaphoren, Mutexe, Spinlocks
- % Priorisierungsmethoden und -probleme
-
- % Festplatten: completely fair queueing
- % cat /sys/block/sdc/queue/scheduler
- % "noop" hat sich für SVG gelohnt
-
- % Virtualisierung + Kernel-Threads + Multiprozessorsystem = Chaos
-
-\end{frame}
-
-\begin{frame}[fragile]
-
- \textbf{Beispiel:}
- \lstinline{usb_serial_get_by_index()} -- serielle Schnittstelle reservieren
-
- Datei \file{linux-3.7-rc1/drivers/usb/serial/usb-serial.c}, ab Zeile 62
-
- \medskip
-
- \begin{lstlisting}
- struct usb_serial *usb_serial_get_by_index (unsigned index)
- {
- struct usb_serial *serial;
- mutex_lock (&table_lock);
- serial = serial_table[index];
- if (serial)
- {
- mutex_lock (&serial->disc_mutex);
- if (serial->disconnected)
- {
- mutex_unlock (&serial->disc_mutex);
- serial = NULL;
- }
- else
- kref_get (&serial->kref);
- }
- mutex_unlock (&table_lock);
- return serial;
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(5.1,6.85){\vector(-1,0){0.5}}
- \put(5.2,6.85){\makebox(0,0)[l]{exklusiven Zugriff auf Tabelle sichern}}
- \put(5.4,1.35){\vector(-1,0){0.5}}
- \put(5.5,1.35){\makebox(0,0)[l]{\shortstack[l]{exklusiven Zugriff auf Tabelle\\wieder freigeben}}}
- \end{picture}
-
-\end{frame}
-
-\setlength{\pdfpageheight}{48cm}
-
-\begin{frame}[fragile]
-
- \lstinline{mutex_lock()} -- Ressource beanspruchen, notfalls warten
-
- Datei \file{linux-3.7-rc1/drivers/usb/serial/usb-serial.c}, ab Zeile 62
-
- \medskip
-
- \begin{lstlisting}
- void __sched mutex_lock (struct mutex *lock)
- {
- might_sleep ();
- __mutex_fastpath_lock (&lock->count, __mutex_lock_slowpath);
- mutex_set_owner (lock);
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(11.6,1.35){\line(-1,0){1}}
- \put(11.6,1.35){\line(0,-1){2.45}}
- \put(11.6,-1.10){\vector(-1,0){2.0}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/arch/x86/include/asm/mutex\_32.h}, ab Zeile 24
-
- Macro-Definition für \lstinline{__mutex_fastpath_lock} (expandiert)
-
- \medskip
-
- Assembler:
- \begin{lstlisting}[language={[x86masm]Assembler}]
- lock dec (lock->count)
- jns 1
- call __mutex_lock_slowpath
- 1:
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(9,0.95){\line(-1,0){3.5}}
- \put(9,0.95){\line(0,-1){2.5}}
- \put(9.0,-1.55){\vector(-1,0){1.0}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/kernel/mutex.c}, ab Zeile 398
-
- \medskip
-
- \begin{lstlisting}
- static __used noinline void __sched
- __mutex_lock_slowpath (atomic_t *lock_count)
- {
- struct mutex *lock = container_of (lock_count, struct mutex, count);
- __mutex_lock_common (lock, TASK_UNINTERRUPTIBLE, 0,
- NULL, _RET_IP_);
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(11.0,1.40){\line(-1,0){1.0}}
- \put(11.0,1.40){\vector(0,-1){2.5}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/kernel/mutex.c}, ab Zeile 132
-
- \medskip
-
- \begin{lstlisting}
- static inline int __sched
- __mutex_lock_common (struct mutex *lock, long state, unsigned int subclass,
- struct lockdep_map *nest_lock, unsigned long ip)
- {
- struct task_struct *task = current;
- struct mutex_waiter waiter;
- unsigned long flags;
-
- preempt_disable ();
- mutex_acquire_nest (&lock->dep_map, subclass, 0, nest_lock, ip);
-
- /* ... */
-
- spin_lock_mutex (&lock->wait_lock, flags);
-
- debug_mutex_lock_common (lock, &waiter);
- debug_mutex_add_waiter (lock, &waiter, task_thread_info (task));
-
- /* add waiting tasks to the end of the waitqueue (FIFO): */
- list_add_tail (&waiter.list, &lock->wait_list);
- waiter.task = task;
-
- if (atomic_xchg (&lock->count, -1) == 1)
- goto done;
-
- lock_contended (&lock->dep_map, ip);
-
- for (;;)
- {
- /*
- * Lets try to take the lock again - this is needed even if
- * we get here for the first time (shortly after failing to
- * acquire the lock), to make sure that we get a wakeup once
- * it's unlocked. Later on, if we sleep, this is the
- * operation that gives us the lock. We xchg it to -1, so
- * that when we release the lock, we properly wake up the
- * other waiters:
- */
- if (atomic_xchg (&lock->count, -1) == 1)
- break;
-
- /*
- * got a signal? (This code gets eliminated in the
- * TASK_UNINTERRUPTIBLE case.)
- */
- if (unlikely (signal_pending_state (state, task)))
- {
- mutex_remove_waiter (lock, &waiter, task_thread_info (task));
- mutex_release (&lock->dep_map, 1, ip);
- spin_unlock_mutex (&lock->wait_lock, flags);
-
- debug_mutex_free_waiter (&waiter);
- preempt_enable ();
- return -EINTR;
- }
- __set_task_state (task, state);
-
- /* didn't get the lock, go to sleep: */
- spin_unlock_mutex (&lock->wait_lock, flags);
- schedule_preempt_disabled ();
- spin_lock_mutex (&lock->wait_lock, flags);
- }
-
- done:
- lock_acquired (&lock->dep_map, ip);
- /* got the lock - rejoice! */
- mutex_remove_waiter (lock, &waiter, current_thread_info ());
- mutex_set_owner (lock);
-
- /* set it to 0 if there are no waiters left: */
- if (likely (list_empty (&lock->wait_list)))
- atomic_set (&lock->count, 0);
-
- spin_unlock_mutex (&lock->wait_lock, flags);
-
- debug_mutex_free_waiter (&waiter);
- preempt_enable ();
-
- return 0;
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(7.9,28.3){\vector(-1,0){0.5}}
- \put(8.0,28.3){\makebox(0,0)[l]{\shortstack[l]{exklusiven Zugriff\\auf Mutex sichern}}}
- \put(7.4,2.3){\vector(-1,1){0.4}}
- \put(7.5,2.0){\makebox(0,0)[l]{\shortstack[l]{exklusiven Zugriff auf Mutex\\wieder freigeben}}}
- \end{picture}
-
-\end{frame}
-
-\setlength{\pdfpageheight}{40.5cm}
-
-\begin{frame}[fragile]
-
- \lstinline{spin_lock_mutex()} -- Mutex beanspruchen, notfalls \emph{busy waiting}
-
- Datei \file{linux-3.7-rc1/kernel/mutex.h}, ab Zeile 12
-
- \medskip
-
- \begin{lstlisting}
- #define spin_lock_mutex(lock, flags) \
- do \
- { \
- spin_lock (lock); \
- (void) (flags); \
- } \
- while (0)
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(8.5,1.75){\line(-1,0){4.5}}
- \put(8.5,1.75){\line(0,-1){2.9}}
- \put(8.5,-1.15){\vector(-1,0){1.0}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/kernel/spinlock.h}, ab Zeile 283
-
- \medskip
-
- \begin{lstlisting}
- static inline void spin_lock (spinlock_t *lock)
- {
- raw_spin_lock (&lock->rlock);
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(9.3,0.95){\line(-1,0){4.0}}
- \put(9.3,0.95){\line(0,-1){2.1}}
- \put(9.3,-1.15){\vector(-1,0){1.0}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/kernel/spinlock.h}, Zeile 170
-
- \medskip
-
- \begin{lstlisting}
- #define raw_spin_lock(lock) _raw_spin_lock (lock)
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(10.0,0.55){\line(-1,0){0.5}}
- \put(10.0,0.55){\line(0,-1){1.7}}
- \put(10.0,-1.15){\vector(-1,0){1.3}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/include/linux/spinlock\_api\_smp.h}, Zeile 47
-
- \medskip
-
- \begin{lstlisting}
- #define _raw_spin_lock(lock) __raw_spin_lock (lock)
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(10.7,0.55){\line(-1,0){0.5}}
- \put(10.7,0.55){\line(0,-1){1.75}}
- \put(10.7,-1.2){\vector(-1,0){2.3}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/kernel/spinlock.c}, ab Zeile 46 (expandiert):
-
- \medskip
-
- \begin{lstlisting}
- void __lockfunc __raw_spin_lock (spinlock_t *lock)
- {
- for (;;)
- {
- preempt_disable ();
- if (likely (do_raw_spin_trylock (lock)))
- break;
- preempt_enable ();
-
- if (!(lock)->break_lock)
- (lock)->break_lock = 1;
- while (!raw_spin_can_lock (lock) && (lock)->break_lock)
- arch_spin_relax (&lock->raw_lock);
- }
- (lock)->break_lock = 0;
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(10.7,4.75){\line(-1,0){3.5}}
- \put(10.7,4.75){\line(0,-1){5.95}}
- \put(10.7,-1.2){\vector(-1,0){1.1}}
- \end{picture}
-
- \bigskip
-
- Datei \file{linux-3.7-rc1/include/linux/spinlock.h}, ab Zeile 150:
-
- \medskip
-
- \begin{lstlisting}
- static inline int do_raw_spin_trylock (raw_spinlock_t *lock)
- {
- return arch_spin_trylock (&(lock)->raw_lock);
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(11.5,0.95){\line(-1,0){3.5}}
- \put(11.5,0.95){\line(0,-1){2.1}}
- \put(11.5,-1.15){\vector(-1,0){0.7}}
- \end{picture}
-
- \bigskip
-
- Datei \file{arch/x86/include/asm/spinlock.h}, ab Zeile 116:
-
- \medskip
-
- \begin{lstlisting}
- static __always_inline int arch_spin_trylock (arch_spinlock_t *lock)
- {
- return __ticket_spin_trylock (lock);
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(9.5,0.95){\line(-1,0){3.5}}
- \put(9.5,0.95){\vector(0,-1){1.7}}
- \end{picture}
-
- \bigskip
-
- Datei \file{arch/x86/include/asm/spinlock.h}, ab Zeile 65:
-
- \medskip
-
- \begin{lstlisting}
- static __always_inline int __ticket_spin_trylock (arch_spinlock_t *lock)
- {
- arch_spinlock_t old, new;
-
- old.tickets = ACCESS_ONCE (lock->tickets);
- if (old.tickets.head != old.tickets.tail)
- return 0;
-
- new.head_tail = old.head_tail + (1 << TICKET_SHIFT);
-
- /* cmpxchg is a full barrier, so nothing can move before it */
- return cmpxchg (&lock->head_tail, old.head_tail, new.head_tail) == old.head_tail;
- }
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(2.2,0.3){\line(0,1){0.4}}
- \put(9.0,0.3){\line(-1,0){6.8}}
- \put(9.0,0.3){\line(0,-1){1.45}}
- \put(9.0,-1.15){\vector(-1,0){3.2}}
- \end{picture}
-
- \bigskip
-
- Datei \file{arch/x86/include/asm/cmpxchg.h}, ab Zeile 147:
-
- \medskip
-
- \begin{lstlisting}
- #define cmpxchg(ptr, old, new) \
- __cmpxchg (ptr, old, new, sizeof (*(ptr)))
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(9.0,0.5){\line(-1,0){1.8}}
- \put(9.0,0.5){\line(0,-1){1.65}}
- \put(9.0,-1.15){\vector(-1,0){2.2}}
- \end{picture}
-
- \bigskip
-
- Datei \file{arch/x86/include/asm/cmpxchg.h}, ab Zeile 131:
-
- \medskip
-
- \begin{lstlisting}
- #define __cmpxchg(ptr, old, new, size) \
- __raw_cmpxchg ((ptr), (old), (new), (size), LOCK_PREFIX)
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(2.2,-0.1){\line(0,1){0.3}}
- \put(9.0,-0.1){\line(-1,0){6.8}}
- \put(9.0,-0.1){\line(0,-1){1.05}}
- \put(9.0,-1.15){\vector(-1,0){2.2}}
- \end{picture}
-
- \bigskip
-
- Datei \file{arch/x86/include/asm/cmpxchg.h}, ab Zeile 110:
-
- \medskip
-
- \begin{lstlisting}
- asm volatile (lock "cmpxchgl %2,%1" \
- : "=a" (__ret), "+m" (*__ptr) \
- : "r" (__new), "0" (__old) \
- : "memory");
- \end{lstlisting}
- \begin{picture}(0,0)
- \color{red}
- \put(9.8,1.8){\vector(-1,0){0.6}}
- \put(9.8,1.2){\line(0,1){0.6}}
- \put(9.8,1.1){\makebox(0,0)[t]{\shortstack{atomarer und exklusiver\\Zugriff auf Spinlock\\durch Hardware-Unterstützung}}}
- \end{picture}
-
-\end{frame}
-
-\setlength{\pdfpageheight}{\normalpdfpageheight}
-
-%\sectionnonumber{Literaturempfehlung}
-%\subsectionnonumber{Automotive Embedded Systeme}
-%
-%\begin{frame}[c]
-%
-% \showsectionnonumber
-%
-% Prof.\ Dr.\ Joachim Wietzke, FH Darmstadt,\\
-% Prof.\ Dr.\ Manh Tien Tran, FH Kaiserslautern:
-%
-% \medskip
-%
-% \showsubsectionnonumber
-%
-% \vspace{-\medskipamount}
-%
-% Springer-Verlag, Berlin, Heidelberg 2005
-%
-% \bigskip
-%
-% Lizenz: proprietär
-%
-% \medskip
-%
-% (gesetzt mit \textrm{\LaTeX}, ca.\ \EUR{10})
-%
-%\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Ressourcen reservieren
- \begin{itemize}
- \item
- \newterm{Semaphor}\\
- gemeinsame Variable mehrerer Prozesse\\
- zur Regelung des Zugriffs auf eine Ressource\\[\smallskipamount]
- Ressource belegt \textarrow\ Kontextwechsel
- \medskip
- \item
- \newterm{Mutex}\\
- Mechanismus, damit immer nur ein Prozeß gleichzeitig\\
- auf eine Ressource zugreifen kann
- \medskip
- \item
- \newterm{Spinlock} (\emph{busy waiting\/})\\
- leichtgewichtige Alternative zu Kontextwechsel
- \medskip
- \item
- \newterm{Kritischer Abschnitt -- critical section}\\
- Programmabschnitt zwischen Reservierung\\
- und Freigabe einer Ressource\\
- \textarrow\ sollte immer so kurz wie möglich sein
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- \begin{picture}(0,0)
- \only<2-3>{\put(6.3,-7){\includegraphics[height=6cm]{philosophenproblem.jpg}}}
- \end{picture}%
- \newterm{Verklemmungen\/}: Gegenseitiges Blockieren von Ressourcen
- \begin{itemize}
- \item
- \newterm{Deadlock\/}: Prozeß wartet
- \item
- \newterm{Livelock\/}: Prozeß macht andere Dinge\\
- (z.\,B.\ \emph{busy waiting\/})
- \end{itemize}
-
- \pause
- \bigskip
-
- Beispiel: Philosophenproblem
-
- \only<2-3>{%
- \begin{itemize}
- \item
- 5 Philosophen, 5 Gabeln
- \item
- 2 Gabeln zum Essen notwendig
- \item
- Wer essen will, nimmt eine Gabel\\
- und wartet notfalls auf die zweite.
- \item
- Keiner legt eine einzelne Gabel\\
- wieder zurück.
- \end{itemize}
- Jeder hält 1 Gabel \textarrow\ \newterm{Verklemmung}\\[0.5\smallskipamount]
- \pause
- \strut\quad schweigen \textarrow\ \newterm{Deadlock}\\
- \strut\quad philosophieren weiter \textarrow\ \newterm{Livelock}\\[-1cm]
- }
- \only<4->{%
- \bigskip
-
- Bedingungen für Verklemmungen:
-
- \begin{minipage}[t]{4.5cm}
- \begin{itemize}
- \item
- Exklusivität
- \item
- \newterm{hold and wait}
- \item
- Entzug nicht möglich
- \item
- zirkuläre Blockade
- \end{itemize}
- \end{minipage}\pause[5]
- \begin{minipage}[t]{7.5cm}
- \begin{itemize}
- \arrowitem
- Spooling
- \arrowitem
- simultane Zuteilung
- \arrowitem
- Prozesse suspendieren, beenden, \newterm{Rollback}
- \arrowitem
- Reihenfolge abhängig von Ressourcen
- \end{itemize}
- \end{minipage}
- }
-
-\end{frame}
-
-\subsection{Prioritäten}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Linux 0.01
- \begin{itemize}
- \item
- Timer-Interrupt: Zähler des aktuellen Prozesses wird dekrementiert;\\
- Prozeß mit höchstem Zähler bekommt Rechenzeit.
- \item
- Wenn es keinen laufbereiten Prozeß mit positivem Zähler gibt,\\
- bekommen alle Prozesse gemäß ihrer \newterm{Priorität\/} neue Zähler zugewiesen.
- \item
- \emph{keine\/} harte Echtzeit
- \arrowitem
- \newterm{dynamische Prioritätenvergabe\/}:\\
- Rechenzeit hängt vom Verhalten des Prozesses ab
- \end{itemize}
-
- \medskip
-
- Echtzeitbetriebssysteme
- \begin{itemize}
- \item
- Prozesse können einen festen Anteil an Rechenzeit bekommen.
- \item
- Bei Ereignissen können Prozesse hoher Priorität\\
- Prozesse niedriger Priorität unterbrechen, aber nicht umgekehrt.
- \arrowitem
- \newterm{statische Prioritätenvergabe}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Echtzeitbetriebssysteme
- \begin{itemize}
- \item
- Prozesse können einen festen Anteil an Rechenzeit bekommen.
- \item
- Bei Ereignissen können Prozesse hoher Priorität\\
- Prozesse niedriger Priorität unterbrechen, aber nicht umgekehrt.
- \end{itemize}
-
- \vspace{0cm plus 1filll}
-
- \begin{center}
- \begin{picture}(11,4)(-1,0)
- \small
-
- \put(-0.1,0.5){\vector(1,0){10.1}}
- \put(9.75,0.4){\makebox(0,0)[tr]{Zeit}}
- \put(0,0.4){\vector(0,1){3.6}}
- \put(-0.1,3.75){\makebox(0,0)[tr]{Priorität}}
-
- \put(1,3){{\color{lightorange}\rule{0.5cm}{0.4cm}}}
- \put(3,3){{\color{lightorange}\rule{0.7cm}{0.4cm}}}
- \put(5,3){{\color{lightorange}\rule{0.6cm}{0.4cm}}}
- \put(7,3){{\color{lightorange}\rule{0.5cm}{0.4cm}}}
- \put(9,3){{\color{lightorange}\rule{0.7cm}{0.4cm}}}
- \put(0,3){\line(1,0){10}}
-
- \put(0,1){{\color{lightgreen}\rule{1cm}{0.4cm}}}
- \put(1.5,1){{\color{lightgreen}\rule{1.5cm}{0.4cm}}}
- \put(3.7,1){{\color{lightgreen}\rule{0.6cm}{0.4cm}}}
- \alt<1>{%
- \put(7.9,1){{\color{lightgreen}\rule{1.1cm}{0.4cm}}}
- }{%
- \put(8.1,1){{\color{lightgreen}\rule{0.9cm}{0.4cm}}}
- }
- \put(9.7,1){{\color{lightgreen}\rule{0.3cm}{0.4cm}}}
- \put(0,1){\line(1,0){10}}
-
- \pause
-
- \put(4.6,2){{\color{lightyellow}\rule{0.4cm}{0.4cm}}}
- \put(5.7,2){{\color{lightyellow}\rule{1.3cm}{0.4cm}}}
- \put(7.7,2){{\color{lightyellow}\rule{0.4cm}{0.4cm}}}
- \put(0,2){\line(1,0){10}}
-
- \end{picture}
- \end{center}
-
-\end{frame}
-
-\subsectionnonumber{Prioritäten \protect\color{darkgray}und Ressourcen}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- \only<4->{%
- Der höher priorisierte Prozeß bewirkt selbst,\\
- daß er eine Ressource verspätet bekommt.
-
- \medskip
-
- \textarrow\ \newterm{begrenzte Prioritätsinversion}
-
- \medskip
-
- maximale Verzögerung: Länge des kritischen Bereichs
- }
-
- \vspace{0cm plus 1filll}
-
- \begin{center}
- \begin{picture}(11,4)(-1,0)
- \small
-
- \put(-0.1,0.5){\vector(1,0){10.1}}
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- \put(-0.1,3.75){\makebox(0,0)[tr]{Priorität}}
-
- \put(1,3){{\color{lightorange}\rule{0.5cm}{0.4cm}}}
- \only<1-2>{\put(3,3){{\color{lightorange}\rule{0.7cm}{0.4cm}}}}
- \only<3->{\put(3,3){{\color{lightorange}\rule{0.4cm}{0.4cm}}}}
- \only<3-4>{%
- \put(3.4,3){{\color{red}\rule{0.8cm}{0.4cm}}}
- \put(4.2,3){{\color{lightorange}\rule{0.2cm}{0.4cm}}}
- {\thicklines
- \put(3.3,2.95){\line(2,1){1.0}}
- \put(3.3,3.45){\line(2,-1){1.0}}}
- }
- \only<5->{%
- \put(3.9,3){{\color{red}\rule{0.8cm}{0.4cm}}}
- \put(4.7,3){{\color{lightorange}\rule{0.2cm}{0.4cm}}}
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- \put(5,3){{\color{lightorange}\rule{0.6cm}{0.4cm}}}
- \only<1-2>{%
- \put(5.4,3){{\color{red}\rule{0.8cm}{0.4cm}}}
- \put(6.2,3){{\color{lightorange}\rule{0.2cm}{0.4cm}}}
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- \put(9,3){{\color{lightorange}\rule{0.7cm}{0.4cm}}}
- \put(0,3){\line(1,0){10}}
-
- \only<2->{%
- \put(0,1){{\color{lightgreen}\rule{1cm}{0.4cm}}}
- \put(1.5,1){{\color{lightgreen}\rule{1.5cm}{0.4cm}}}
- \put(2.6,1){{\color{medgreen}\rule{0.4cm}{0.4cm}}}
- \only<2-4>{%
- \put(3.7,1){{\color{medgreen}\rule{0.5cm}{0.4cm}}}
- \put(4.2,1){{\color{lightgreen}\rule{0.3cm}{0.4cm}}}
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- }
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- \end{picture}
- \end{center}
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- \visible<4->{%
- Ein Prozeß mit mittlerer Priorität bewirkt,
- daß ein Prozeß mit hoher Priorität eine Ressource überhaupt nicht bekommt.
-
- \medskip
-
- \textarrow\ }\newterm{unbegrenzte Prioritätsinversion}
-
- \pause
- \vspace{0cm plus 1filll}
-
- \begin{center}
- \begin{picture}(11,4)(-1,0)
- \small
-
- \put(-0.1,0.5){\vector(1,0){10.1}}
- \put(9.75,0.4){\makebox(0,0)[tr]{Zeit}}
- \put(0,0.4){\vector(0,1){3.6}}
- \put(-0.1,3.75){\makebox(0,0)[tr]{Priorität}}
-
- \put(1,3){{\color{lightorange}\rule{0.5cm}{0.4cm}}}
- \put(3,3){{\color{lightorange}\rule{0.4cm}{0.4cm}}}
- \only<2>{%
- \put(3.4,3){{\color{red}\rule{0.8cm}{0.4cm}}}
- \put(4.2,3){{\color{lightorange}\rule{0.2cm}{0.4cm}}}
- {\thicklines
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- \put(9,3){{\color{lightorange}\rule{0.7cm}{0.4cm}}}
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-
- \only<2->{%
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- \put(1.5,1){{\color{lightgreen}\rule{1.1cm}{0.4cm}}}
- \alt<1-4>{%
- \put(2.6,1){{\color{medgreen}\rule{0.4cm}{0.4cm}}}
- }{%
- \put(2.6,1){{\color{medgreen}\rule{0.2cm}{0.4cm}}}
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- \only<2>{%
- \put(3.7,1){{\color{medgreen}\rule{0.5cm}{0.4cm}}}
- \put(4.2,1){{\color{lightgreen}\rule{0.3cm}{0.4cm}}}
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- \only<3-4>{%
- \put(3.4,1){{\color{medgreen}\rule{0.5cm}{0.4cm}}}
-% \put(3.9,1){{\color{lightgreen}\rule{0.3cm}{0.4cm}}}
- }
- \only<2>{%
- \put(7.7,1){{\color{lightgreen}\rule{1.3cm}{0.4cm}}}
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- \end{picture}
- \end{center}
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Ein Prozeß mit mittlerer Priorität bewirkt,
- daß ein Prozeß mit hoher Priorität eine Ressource überhaupt nicht bekommt.
-
- \medskip
-
- \textarrow\ \newterm{unbegrenzte Prioritätsinversion}
-
- \medskip
-
- Beispiel: Beinahe-Verlust der Marssonde \emph{Pathfinder\/} im Juli 1997
-
- \only<1>{%
- \begin{center}
- \includegraphics[width=8.5cm]{pathfinder.jpg}
- \vspace*{-1.5cm}
- \end{center}
- }
-
- \bigskip
-
- \only<2>{%
- Gegenmaßnahmen
- \begin{itemize}
- \item
- \newterm{Priority Inheritance -- Prioritätsvererbung}\\
- Der Besitzer des Mutex erbt die Priorität\\
- des Prozesses, der auf den Mutex wartet.
- \end{itemize}
-
- \bigskip
-
- \begin{minipage}{7.0cm}
- \begin{flushright}
- \url{http://research.microsoft.com/en-us/\\um/people/mbj/Mars\_Pathfinder/}
- \end{flushright}
- \end{minipage}
-
- \vspace{-0.2cm}\strut\hfill\makebox(0,0)[br]{\includegraphics[height=2.7cm]{pathfinder.jpg}}\vspace*{-1cm}
- }
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Ein Prozeß mit mittlerer Priorität bewirkt,
- daß ein Prozeß mit hoher Priorität eine Ressource überhaupt nicht bekommt.
-
- \medskip
-
- \textarrow\ \newterm{unbegrenzte Prioritätsinversion}
-
- \bigskip
-
- Gegenmaßnahme: \newterm{Priority Inheritance -- Prioritätsvererbung}
-
- \vspace{0cm plus 1filll}
-
- \begin{center}
- \begin{picture}(11,4)(-1,0)
- \small
-
- \put(-0.1,0.5){\vector(1,0){10.1}}
- \put(9.75,0.4){\makebox(0,0)[tr]{Zeit}}
- \put(0,0.4){\vector(0,1){3.6}}
- \put(-0.1,3.75){\makebox(0,0)[tr]{Priorität}}
-
- \put(0,1){{\color{lightgreen}\rule{1cm}{0.4cm}}}
- \put(1.5,1){{\color{lightgreen}\rule{1.1cm}{0.4cm}}}
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- \put(0,3){\line(1,0){10}}
-
- \only<2>{%
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- {\thicklines
- \put(3.3,2.95){\line(2,1){1.0}}
- \put(3.3,3.45){\line(2,-1){1.0}}}
- }
-
- \only<3->{%
- \put(3.4,3){{\color{medgreen}\rule{0.7cm}{0.4cm}}}
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- \put(9,3){{\color{lightorange}\rule{0.7cm}{0.4cm}}}
- \put(9.7,2){{\color{lightyellow}\rule{0.3cm}{0.4cm}}}
- }
- \end{picture}
- \end{center}
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Ein Prozeß mit mittlerer Priorität bewirkt,
- daß ein Prozeß mit hoher Priorität eine Ressource überhaupt nicht bekommt.
-
- \medskip
-
- \textarrow\ \newterm{unbegrenzte Prioritätsinversion}
-
- \bigskip
-
- Gegenmaßnahme: \newterm{Priority Ceiling -- Prioritätsobergrenze}
-
- \vspace{0cm plus 1filll}
-
- \begin{center}
- \begin{picture}(11,4)(-1,0)
- \small
-
- \put(-0.1,0.5){\vector(1,0){10.1}}
- \put(9.75,0.4){\makebox(0,0)[tr]{Zeit}}
- \put(0,0.4){\vector(0,1){3.6}}
- \put(-0.1,3.75){\makebox(0,0)[tr]{Priorität}}
-
- \put(0,1){{\color{lightgreen}\rule{1cm}{0.4cm}}}
- \put(1.5,1){{\color{lightgreen}\rule{1.1cm}{0.4cm}}}
-% \only<1>{%
-% \put(2.6,1){{\color{medgreen}\rule{0.2cm}{0.4cm}}}
-% }
- \put(0,1){\line(1,0){10}}
-
-% \only<1>{%
-% \put(2.8,2){{\color{lightyellow}\rule{0.2cm}{0.4cm}}}
-% \put(3.4,2){{\color{lightyellow}\rule{6.6cm}{0.4cm}}}
-% }
- \put(0,2){\line(1,0){10}}
-
- \put(1,3){{\color{lightorange}\rule{0.5cm}{0.4cm}}}
-% \only<1>{%
-% \put(3,3){{\color{lightorange}\rule{0.4cm}{0.4cm}}}
-% }
- \put(0,3){\line(1,0){10}}
-
-% \only<2>{%
-% \only<2>{%
- \put(2.6,3){{\color{medgreen}\rule{0.9cm}{0.4cm}}}
- \put(3.5,3){{\color{lightorange}\rule{0.4cm}{0.4cm}}}
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- \put(4.7,3){{\color{lightorange}\rule{0.8cm}{0.4cm}}}
- \put(5.5,2){{\color{lightyellow}\rule{1.5cm}{0.4cm}}}
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- \put(9,3){{\color{lightorange}\rule{0.7cm}{0.4cm}}}
- \put(9.7,2){{\color{lightyellow}\rule{0.3cm}{0.4cm}}}
-% }
- \end{picture}
- \end{center}
-
-\end{frame}
-
-\begin{frame}
-
- \showsection
- \showsubsection
-
- Ein Prozeß mit mittlerer Priorität bewirkt,
- daß ein Prozeß mit hoher Priorität eine Ressource überhaupt nicht bekommt.
-
- \medskip
-
- \textarrow\ \newterm{unbegrenzte Prioritätsinversion}
-
- \medskip
-
- Beispiel: Beinahe-Verlust der Marssonde \emph{Pathfinder\/} im Juli 1997
-
- \bigskip
-
- Gegenmaßnahmen
- \begin{itemize}
- \item
- \newterm{Priority Inheritance -- Prioritätsvererbung}\\
- Der Besitzer des Mutex erbt die Priorität\\
- des Prozesses, der auf den Mutex wartet.
- \smallskip
- \item
- \newterm{Priority Ceiling -- Prioritätsobergrenze}\\
- Der Besitzer des Mutex bekommt sofort\\
- die Priorität des höchstmöglichen Prozesses,\\
- der evtl.\ den Mutex benötigen könnte.
- \pause
- \begin{picture}(0,0)
- \put(1.2,1.45){\makebox(0,0)[l]{$\left\}\rule{0pt}{1.7cm}\right.$
- \begin{minipage}{4cm}
- nur möglich, wenn\\
- Mutexe im Spiel sind
- \end{minipage}}}
- \end{picture}
- \smallskip
- \pause
- \item
- \newterm{Priority Aging}\\
- Die Priorität wächst mit der Wartezeit.
- \end{itemize}
- \vspace*{-1cm}
-
-\end{frame}
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}%
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \item[\textbf{4}] \textbf{Bus-Systeme}
- \begin{itemize}
- \item[4.1] Was sind Bus-Systeme?
- \item[4.2] RS-232
- \item[4.3] \ItwoC\ (TWI)
- \item[4.4] SPI
- \color{medgreen}
- \item[4.5] PWM
- \item[5.6] Sonstiges
- \end{itemize}
- \item[\textbf{5}] \textbf{Echtzeit}
- \begin{itemize}
- \color{medgreen}
- \item[5.1] Was ist Echtzeit?
- \item[5.2] Echtzeitprogrammierung
- \item[5.3] Multitasking
- \item[5.4] Ressourcen
- \item[5.5] Prioritäten
- \end{itemize}
- \vspace*{-\medskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\end{document}
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-../common/motherboard-anschluesse.jpg
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-../common/pathfinder.jpg
\ No newline at end of file
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+++ /dev/null
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-#!/bin/bash
-
-for t in $(seq 10 -1 0); do
- sleep 1s
- echo $t
-done
-
-echo "Hello, world!"
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--- a/20181220/lic-20181220.tex
+++ /dev/null
@@ -1,634 +0,0 @@
-% lic-20160512.pdf - Lecture Slides on Applied Computer Sciences
-% Copyright (C) 2012, 2015, 2016 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-\documentclass[10pt]{beamer}
-
-\usepackage[utf8]{luainputenc}
-\usepackage[german]{babel}
-\usepackage[T1]{fontenc}
-\usepackage{helvet}
-\renewcommand*\familydefault{\sfdefault}
-
-\usetheme{default}
-\usefonttheme{structurebold}
-\setbeamertemplate{navigation symbols}{}
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-\setbeamertemplate{itemize item}{$\bullet$}
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-
-\usepackage{listings}
-\lstset{basicstyle=\color{structure},
- language=C,
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- gobble=4,
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- \vtop{\subsecname}\par}\bigskip}
-
-\begin{document}
-
-\sectionnonumber{Software-Lizenzen}
-\subsectionnonumber{Vorab: Dies ist keine Rechtsdienstleistung!}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \pause
- \showsubsectionnonumber
-
- \textbf{\S\,2 RDG: Begriff der Rechtsdienstleistung}
-
- \smallskip
-
- (1) Rechtsdienstleistung ist jede Tätigkeit in
- {\only<3->{\color{red}}konkreten} fremden Angelegenheiten,
- sobald sie eine rechtliche Prüfung des
- {\only<3->{\color{red}}Einzelfalls} erfordert.
-
- \medskip
-
- \strut\hfill Quelle: \url{http://www.gesetze-im-internet.de/rdg/}
-
- \pause
- \pause
-
- \bigskip
-
- Konkreter Fall:
- \begin{itemize}
- \item
- Konkretes Programm unter Lizenz A
- \item
- Konkrete Bibliothek unter Lizenz B
- \item
- Beratung: Paßt das zusammen?
- \arrowitem
- Rechtsdienstleistung
- \end{itemize}
-\end{frame}
-
- \subsectionnonumber{Lizenz-Beratung unter Kollegen?}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- \textbf{\S\,6 RDG: Unentgeltliche Rechtsdienstleistungen}
-
- \smallskip
-
- (1) Erlaubt sind Rechtsdienstleistungen, die nicht im Zusammenhang mit einer entgeltlichen
- Tätigkeit stehen (unentgeltliche Rechtsdienstleistungen).
-
- \smallskip
-
- (2) Wer unentgeltliche Rechtsdienstleistungen außerhalb familiärer, nachbarschaftlicher oder
- ähnlich enger persönlicher Beziehungen erbringt, muss sicherstellen, dass die Rechtsdienstleistung
- durch eine Person, der die entgeltliche Erbringung dieser Rechtsdienstleistung erlaubt ist, durch
- eine Person mit Befähigung zum Richteramt oder unter Anleitung einer solchen Person erfolgt.
- [\,\dots]
-
- \medskip
-
- \strut\hfill Quelle: \url{http://www.gesetze-im-internet.de/rdg/}
-
- \pause
-
- \bigskip
-
- \begin{itemize}
- \arrowitem
- Nur allgemein beraten!\\
- Konkrete Fälle an Anwalt verweisen!
- \end{itemize}
-
-\end{frame}
-
- \subsectionnonumber{Überblick}
- \newcommand{\lcr}{\includegraphics[width=0.5cm]{Copyright.pdf}}
- \newcommand{\lcl}{\includegraphics[width=0.5cm]{Copyleft.pdf}}
- \newcommand{\lcc}{\includegraphics[width=0.5cm]{creative-commons.png}}
- \newcommand{\lpd}{\includegraphics[width=0.5cm]{PD-icon.pdf}}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- \begin{itemize}
- \item
- Grundlage: Urheberrecht ($\approx$ Copyright) \hfill \lcr\\
- "`Wer Software schreibt, entscheidet, was damit geschehen darf."'
- \pause
- \medskip
- \item
- anderen etwas erlauben: Lizenz
- \pause
- \medskip
- \item
- "`gar keine Lizenz"' = alles verboten
- \end{itemize}
-\end{frame}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- \begin{center}
- \begin{picture}(12,5)
- \put(5,5){\makebox(0,0){Software-Lizenz}}
- \put(4.5,4.7){\vector(-1,-1){1}}
- \put(5.5,4.7){\vector(1,-1){1}}
- \put(3,3.4){\makebox(0,0){proprietär}}
- \put(7,3.4){\makebox(0,0){frei / Open Source}}
- \put(6.5,3.1){\vector(-1,-1){1.5}}
- \put(7.5,3.1){\vector(1,-1){1}}
- \put(4.5,1.3){\makebox(0,0){freizügig}}
- \put(9,1.8){\makebox(0,0){Copyleft}}
- \end{picture}%
- \begin{onlyenv}<2->%
- \begin{picture}(0,0)(12,0)
- \color{darkgreen}
- \put(2.5,3.1){\vector(-1,-1){0.5}}
- \put(3.5,3.1){\vector(1,-1){0.5}}
- \put(2.0,2.3){\makebox(0,0){kommerziell}}
- \put(4.0,2.3){\makebox(0,0){gratis}}
- \put(4.0,1.0){\vector(-1,-1){0.5}}
- \put(5.0,1.0){\vector(1,-1){0.5}}
- \put(3.5,0.2){\makebox(0,0){kommerziell}}
- \put(5.5,0.2){\makebox(0,0){gratis}}
- \put(8.5,1.5){\vector(-1,-1){0.5}}
- \put(9.5,1.5){\vector(1,-1){0.5}}
- \put(8.0,0.7){\makebox(0,0){kommerziell}}
- \put(10.0,0.7){\makebox(0,0){gratis}}
- \end{picture}%
- \end{onlyenv}%
- \end{center}
-
-\end{frame}
-
- \subsectionnonumber{Lizenzmodelle}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- \begin{itemize}
- \item
- Freie Software darf man
- \hfill\begin{picture}(0,0)
- \put(-1.8,-0.8){\includegraphics[width=2cm]{a-gnu-head.pdf}}
- \end{picture}
- \begin{itemize}
- \item[0.]
- benutzen,
- \item[1.]
- studieren und anpassen,
- \item[2.]
- weitergeben,
- \item[3.]
- weiterentwickeln und veröffentlichen.
- \end{itemize}
- \strut\hfill
- 4 Grundfreiheiten --
- \url{http://www.gnu.org/philosophy/free-sw}\\
- \pause
- \begin{picture}(0,0)
- \color{red}
- \put(6.95,1.85){\vector(-1,0){1.5}}
- \put(7.00,1.75){\vector(-1,-1){0.5}}
- \put(7.05,1.85){\makebox(0,0)[l]{Quelltext erforderlich!}}
- \end{picture}%
- \pause
- \medskip
- \item
- Open Source: i.\,w.\ dasselbe in 10 Kriterien
- \hfill\begin{picture}(0,0)
- \put(-1.2,-0.5){\includegraphics[width=1.1cm]{osi-logo.jpg}}
- \end{picture}\\
- Begründung: technisch statt philosophisch\\[\smallskipamount]
- \strut\hfill
- Definition:
- \url{http://www.opensource.org/docs/osd}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- \begin{itemize}
- \item
- Proprietäre Software / Closed Source\\
- Gegenteil von freier Software / Open Source
- \medskip
- \begin{itemize}
- \item
- Benutzen, Weitergeben und/oder Veröffentlichen\\
- erfordert individuelle Erlaubnis des Rechteinhabers
- \medskip
- \item
- Studieren, Anpassen und/oder Weiterentwickeln\\
- nur dem Rechteinhaber erlaubt
- \pause
- {\color{red}und/oder möglich\\
- (Quelltext erforderlich!)}
- \end{itemize}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- \begin{itemize}
- \item
- Freie Software
- \smallskip
- \begin{itemize}
- \item
- Copyleft\only<2->{:}\\[\smallskipamount]
- \begin{visibleenv}<2->
- Weitergabe nur unter gleichen Bedingungen erlaubt\\
- \textarrow\ Umwandlung in proprietäre Software nicht erlaubt
- \end{visibleenv}
- \medskip
- \item
- freizügig\only<3->{:}\\[\smallskipamount]
- \begin{visibleenv}<3->
- Weitergabe auch unter anderen Bedingungen erlaubt\\
- \textarrow\ Umwandlung in \only<4->{Copyleft- oder }proprietäre Software erlaubt
- \end{visibleenv}
- \begin{onlyenv}<5->
- \medskip
- \item
- Teil-Copyleft:\\[\smallskipamount]
- Linken mit proprietärer Software erlaubt
- \end{onlyenv}
- \end{itemize}
- \end{itemize}
-
-
-\end{frame}
-
- \subsectionnonumber{Beispiel-Programme}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- \begin{center}
- \renewcommand{\arraystretch}{2.5}
- \begin{tabular}{|c||c|c|c|}\hline
- & \multirow{2}{*}{proprietär} & \multicolumn{2}{c|}{frei}\\\cline{3-4}
- & & freizügig & Copyleft \\\hline\hline
- \color{darkgreen}kommerziell
- & \color{structure}\visible<2->{\shortstack{\\\includegraphics[width=0.5cm]{Microsoft_Power_Point_2010.png}\\\small Microsoft PowerPoint}}
- & \color{structure}\visible<6->{\shortstack{\\\includegraphics[width=1.0cm]{721px-Pfs-logo.png}\\\small pfSense}}
- & \color{structure}\visible<5->{\shortstack{\\\includegraphics[width=0.8cm]{open-xchange.jpg}\\\small Open-Xchange}} \\\hline
- \color{darkgreen}gratis
- & \color{structure}\visible<4->{\shortstack{\\\includegraphics[width=0.8cm]{Adobe-Reader.png}\\\small Adobe Reader}}
- & \color{structure}\visible<6->{\shortstack{\\\includegraphics[width=0.5cm]{putty.png}\\\small PuTTY}}
- & \color{structure}\visible<3->{\shortstack{\\\includegraphics[width=0.5cm]{libreoffice-impress.pdf}\\\small LibreOffice Impress}} \\\hline
- \end{tabular}
- \end{center}
- \begin{onlyenv}<7->%
- \begin{picture}(0,0)(0,-0.5)
- \color{red}
- \put(7.38,1.38){$\updownarrow$}
- \put(9.8,1.38){$\updownarrow$}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<8->%
- \begin{picture}(0,0)(0,-0.7)
- \color{red}
- \put(6.3,2.7){$\longleftarrow$}
- \put(8.05,2.7){$\longrightarrow$}
- \end{picture}%
- \end{onlyenv}%
-
-\end{frame}
-
- \subsectionnonumber{Beispiel-Lizenzen}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- \pause
- Freie Software / Open Source
- \begin{itemize}
- \item
- strenges Copyleft:
- GNU GPL, GNU FDL, CC BY-SA
- \pause
- \item
- Teil-Copyleft:
- GNU LGPL, Mozilla-Lizenz, Microsoft Public License
- \pause
- \item
- freizügig:
- Modifizierte BSD-Lizenz, Apache-Lizenz, CC BY,\\
- CC0, Public Domain
- \end{itemize}
- \pause
- \strut\hfill\url{http://www.gnu.org/licenses/license-list}
-
-\end{frame}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Lizenz i.\,d.\,R.\ für jedes Programm anders
- \pause
- \medskip
- \item
- "`Normales"' Beispiel (Januar 2012):\\
- Adobe Reader EULA\\[\smallskipamount]
- Verwenden \only<3->{nur auf PCs }erlaubt\pause\pause,\\
- Studieren und Weitergeben nicht erlaubt\pause,\\
- Screenshots nicht erlaubt\\[\smallskipamount]
- \pause
- Der Software ist die Kommunikation mit Adobe\\
- und mit Werbeanbietern erlaubt.\\[\medskipamount]
- \pause
- \strut\hfill\url{http://www.adobe.com/products/eulas/reader/x/eula_de_de.html}
- \medskip
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Kontroverses Beispiel (Januar 2012):\\
- iBooks Author EULA\\[\smallskipamount]
- Layout für elektronische Bücher erstellen\\
- \pause
- \textarrow\ Buch darf nur über den iBooks Store verkauft werden\\[\medskipamount]
- \strut\hfill\url{http://venomousporridge.com/post/16126436616/}\\
- \strut\hfill\url{ibooks-author-eula-audacity}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Kontroverses Beispiel (September 2001):\\
- Microsoft FrontPage 2002 EULA\\[\smallskipamount]
- Webseiten erstellen\\
- \pause
- \textarrow\ Webseiten dürfen Microsoft nicht "`herabsetzen"'\\[\medskipamount]
- \strut\hfill\url{http://www.heise.de/newsticker/data/jes-21.09.01-001/}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Kontroverses Beispiel (Juli 2001):\\
- Microsoft Mobile Internet Toolkit EULA\\[\smallskipamount]
- Software erstellen\\
- \pause
- \textarrow\ Verbot, {\color{darkgreen}"`virale"'} Software
- \only<3->{(= Copyleft-Software) }zu erstellen \\
- \pause
- \pause
- \textarrow\ Verbot, Copyleft-Werkzeuge mit einzusetzen \\
- \textarrow\ Verbot, entwickelte Software gemeinsam mit Copyleft-Software\\
- \strut\phantom{\textarrow} einzusetzen oder zu vertreiben\\[\medskipamount]
- \strut\hfill\url{http://web.archive.org/web/20010626201507/}\\
- \strut\hfill\url{http://msdn.microsoft.com/downloads/eula_mit.htm}
- \end{itemize}
-
- % Nicht auf derselben CD: http://msdn.microsoft.com/downloads/eula_mit.htm, 22.7.2001
-
-\end{frame}
-
- \subsectionnonumber{Copyleft}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
- \showsubsectionnonumber
-
- Microsoft: Copyleft-Software ist {\color{darkgreen}"`viral"'}\\[\smallskipamount]
- \strut\hfill\url{http://web.archive.org/web/20010626201507/}\\
- \strut\hfill\url{http://msdn.microsoft.com/downloads/eula_mit.htm}
-
- \bigskip
-
- \begin{center}
- \color{structure}%
- \begin{onlyenv}<2->%
- \begin{picture}(10,5)
- \put(5,5){\makebox(0,0){Code aus fremder Software benutzen}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<3->%
- \begin{picture}(0,0)(10,0)
- \put(4.5,4.7){\vector(-1,-1){1}}
- \put(3.5,3.4){\makebox(0,0){\strut GPL-Software:}}
- \put(3.5,2.95){\makebox(0,0){\strut{\color{darkgreen}bedingt} erlaubt}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<4->%
- \begin{picture}(0,0)(10,0)
- \color{darkgreen}
- \put(3.0,2.7){\vector(0,-1){0.7}}
- \put(3.0,1.8){\makebox(0,0){\strut Gesamtwerk muß}}
- \put(3.0,1.35){\makebox(0,0){\strut unter GPL stehen}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<5->%
- \begin{picture}(0,0)(10,0)
- \put(5.5,4.7){\vector(1,-1){1}}
- \put(6.5,3.4){\makebox(0,0){\strut MS-Software:}}
- \put(6.5,2.95){\makebox(0,0){\strut{\color{red}nicht} erlaubt}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<6->%
- \begin{picture}(0,0)(10,0)
- \color{black}
- \put(5.5,1.2){\makebox(0,0)[l]{\textarrow\
- \begin{minipage}[t]{5cm}
- Lizenzen lesen,\\
- sorgfältig auswählen
- \end{minipage}}}
- \end{picture}%
- \end{onlyenv}%
- \end{center}
-
-\end{frame}
-
- \subsectionnonumber{Fazit}
-
-\begin{frame}[t,plain]
- \showsectionnonumber
-
- {\large\color{structure}\bf Fazit\par}
- \begin{itemize}
- \item
- Generell: Vor Benutzung Lizenz lesen, durch Anwalt prüfen lassen
- \pause
- \item
- "`gar keine Lizenz"' = alles verboten
- \end{itemize}
-
- \pause
- Bearbeitung, Weitergabe und Mitverwendung
- \begin{itemize}
- \pause
- \item
- nicht erlaubt oder nicht möglich
- \textarrow\ proprietäre Software / Closed Source
- \pause
- \item
- erlaubt \textarrow\ freie Software / Open Source
- \begin{itemize}
- \pause
- \item
- bei Mitverwendung Lizenz übernehmen \textarrow\ Copyleft
- \pause
- \item
- Lizenz umwandelbar \textarrow\ freizügig
- \end{itemize}
- \end{itemize}
-
- \pause
-
- \bigskip
-
- {\large\color{structure}\bf Lizenz für diese Lehrmaterialien\par}
- \begin{itemize}
- \item
- Vortragsfolien und Skripte: Copyleft
- \item
- Beispiel-Programme: freizügig
- \end{itemize}
-
-\end{frame}
-
-\end{document}
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@@ -1,380 +0,0 @@
-% verschluesselung-20181220.pdf - Lecture Slides on Email Encryption
-% Copyright (C) 2012, 2013, 2015, 2016, 2017, 2018 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-% README: E-Mail-Verschlüsselung
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{pdftricks}
-\usepackage{tikz}
-
-\begin{psinputs}
- \usepackage[utf8]{inputenc}
- \usepackage[german]{babel}
- \usepackage[T1]{fontenc}
- \usepackage{helvet}
- \renewcommand*\familydefault{\sfdefault}
- \usepackage{pstricks,pst-grad}
-\end{psinputs}
-
-\title{E-Mail-Verschlüsselung}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{20.\ Dezember 2018}
-
-\begin{document}
-
-\maketitleframe
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/hp.git}}}
- \begin{itemize}
- \item[1.1]
- Warum verschlüsseln?
- \item[1.2]
- Einfache Verschlüsselungsalgorithmen
- \item[1.2]
- Symmetrische Verschlüsselungsalgorithmen
- \end{itemize}
- \item[\textbf{2}] \textbf{Ihr Verschlüsselungs-"`Führerschein"'}
- \begin{itemize}
- \item[2.1]
- Geheime und öffentliche Schlüssel
- \item[2.2]
- Digitale Signaturen
- \item[2.3]
- Zertifikate -- Web of Trust
- \end{itemize}
- \item[\textbf{3}] \textbf{Verschlüsselung in der Praxis}
- \item[\textbf{4}] \textbf{Fazit}
- \end{itemize}
-
-\end{frame}
-
-\section{Einführung}
-\subsection{Warum verschlüsseln?}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{quote}
- "`Ich habe nichts zu verbergen."'
- \end{quote}
-
- \begin{itemize}
- \item
- Vor wem? Wirklich vor jedem?\\
- Wirklich alles über Sie?
- \item
- Auch nicht vor dem organisierten Verbrechen?
- \item
- Illegaler Zugriff auf staatlich gesammelte Daten ist möglich!
- \bigskip
- \arrowitem
- Der einzige wirklich sichere Weg,\\
- Datensammlungen gegen Mißbrauch zu schützen,\\
- ist, die Daten gar nicht erst zu sammeln.
- \end{itemize}
-\end{frame}
-
-\subsection{Einfache Verschlüsselungsalgorithmen}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- Cäsar-Chiffre: Alphabet rotieren\\
- Beispiel: ROT13 (mit Schlüssel 13)\\
- 25 verschiedene Schlüssel
- \textarrow\ Schlüssellänge $\approx 4.64$\,Bit
- ($2^{4.64} \approx 25$)\\
- leicht zu knacken
- \pause
- \item
- Zufälliges Rotieren des gesamten Zeichensatzes:\\
- Für jedes Zeichen wird neu "`gewürfelt"'.\\
- \pause
- \textarrow\ Schlüssellänge = Länge der Nachricht\\
- unknackbar
- (mathematisch beweisbar)\\
- \pause
- praktische Probleme:
- \begin{itemize}
- \item Schlüssel genauso lang wie Nachricht
- \textarrow\ schwer zu übertragen
- \item Schlüssel (echter Zufall!) schwer zu generieren
- \end{itemize}
- \pause
- \item
- Dasselbe mit Pseudozufallsgenerator\\
- Schlüssel = Startwert\\
- \pause
- \textarrow\ Schlüssellänge = Bits des Startwerts\\
- meistens knackbar,
- nur für spezielle Pseudozufallsgeneratoren sicher\\
- \textarrow\ Verschlüsselungsverfahren
- \end{itemize}
- \vspace*{-1cm}
-\end{frame}
-
-\subsection{Symmetrische Verschlüsselungsalgorithmen}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \renewcommand{\arraystretch}{1.2}
- \begin{center}
- \begin{tabular}{l|c|c}
- \textbf{Verfahren} & \textbf{Schlüssellänge} & \textbf{sicher} \\\hline
- Cäsar-Chiffre & 4.64 Bit & nein \\
- One-Time Pad (OTP) & Länge der Nachricht & ja \\
- Enigma & 81.2 Bit & nein \\
- Standard-Pseudozufallszahlen & typischerweise 64 Bit & nein \\\hline
- DES & 56 Bit & nein \\
- IDEA & 128 Bit & ja \\
- Blowfish & 128 Bit & ja \\
- Twofish & 128 Bit & ja \\
- CAST & 128 Bit & ja \\
- AES / Rijndael & 128 Bit & ja
- \end{tabular}
- \end{center}
-\end{frame}
-
-\section{Ihr Verschlüsselungs-"`Führerschein"'}
-\subsection{Geheime und öffentliche Schlüssel}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Verschlüsselte Kommunikation:
- \begin{itemize}
- \item
- Versenden der Nachricht über öffentlichen Kanal (z.\,B.\ E-Mail)
- \item
- Versenden des Schlüssels über geheimen Kanal (z.\,B.\ persönlich)
- \end{itemize}
-
- \medskip
-
- Probleme:
- \begin{itemize}
- \item
- Kommunikation mit Unbekannten
- \item
- Kommunikation in Gruppen
- \end{itemize}
-
- \medskip
-
- Lösung:
- \begin{itemize}
- \item
- Asymmetrische Verschlüsselungsverfahren
- \item
- Geheime und öffentliche Schlüssel
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Asymmetrische Verschlüsselungsverfahren:
- \begin{itemize}
- \item
- Unterschiedliche Schlüssel zum Ver- und Entschlüsseln
- \item
- Verschlüsseln: \newterm{öffentlicher Schlüssel}
- \item
- Entschlüsseln: \newterm{geheimer Schlüssel}
- \end{itemize}
-
- \medskip
-
- Schlüsselaustausch:
- \begin{itemize}
- \item
- Abhören: kein Problem mehr
- \item
- Identifikation: persönlicher Kontakt weiterhin erforderlich
- \end{itemize}
-
- \medskip
-
- Lösung:
- \begin{itemize}
- \item
- Digitale Signaturen
- \item
- Zertifikate -- Web of Trust
- \end{itemize}
-
- \vspace{0cm plus 1filll minus 1filll}
-
- \renewcommand{\arraystretch}{1.2}
- \begin{flushright}
- \begin{tabular}{l|c|c}
- \textbf{Verfahren} & \textbf{Schlüssellänge} & \textbf{sicher} \\\hline
- RSA & ab 2048 Bit & ja \\
- ElGamal & ab 2048 Bit & ja \\
- ECDSA & 160 Bit & ja
- \end{tabular}
- \end{flushright}
-\end{frame}
-
-\subsection{Digitale Signaturen}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Asymmetrische Verschlüsselungsverfahren:
- \begin{itemize}
- \item
- Unterschiedliche Schlüssel zum Ver- und Entschlüsseln
- \item
- Verschlüsseln: geheimer Schlüssel
- \item
- Entschlüsseln: öffentlicher Schlüssel
- \item
- Prüfwert der Nachricht verschlüsseln
- \arrowitem
- Wer das verschlüsselt hat,\\
- muß im Besitz des geheimen Schlüssels sein.\\
- \textarrow\ \newterm{digitale Signatur}
- \end{itemize}
-
- \vspace{0cm plus 1filll minus 1filll}
-
- \renewcommand{\arraystretch}{1.2}
- \begin{flushright}
- \begin{tabular}{l|c|c}
- \textbf{Verfahren} & \textbf{Schlüssellänge} & \textbf{sicher} \\\hline
- RSA & ab 2048 Bit & ja \\
- ElGamal & ab 2048 Bit & ja \\
- ECDSA & 160 Bit & ja
- \end{tabular}
- \end{flushright}
-\end{frame}
-
-\subsection{Zertifikate -- Web of Trust}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- Alice will Bob eine verschlüsselte Nachricht schicken.
- \item
- Alice lädt den öffentlichen Schlüssel von Bob herunter.
- \arrowitem
- Ist der Schlüssel wirklich der von Bob?
- \pause
- \medskip
- \item
- Trent hat den öffentlichen Schlüssel von Bob unterschrieben:\\
- "`Ich bezeuge, daß dieser Schlüssel wirklich Bob gehört."'
- \arrowitem
- Trent agiert als \newterm{Zertifizierungsstelle}.
- \medskip
- \item
- Alice hat bereits den öffentlichen Schlüssel von Trent\\
- und kann daher die Signatur prüfen.
- \item
- Alice vertraut Trent. \textarrow\ \newterm{Vertrauen in Person}
- \arrowitem
- Der öffentliche Schlüssel von Bob ist echt. \textarrow\ \newterm{Vertrauen in Schlüssel}
- \end{itemize}
-\end{frame}
-
-\section{Verschlüsselung in der Praxis}
-
-\begin{frame}
- \showsection
-
- \begin{itemize}
- \item
- Software: GNU Privacy Guard (GnuPG)\\
- herunterladen und installieren
- \begin{itemize}
- \item
- Plug-In für Mozilla Thunderbird: Enigmail
- \item
- GnuPG Basics Pack
- \item
- GPG4Win
- \item
- \dots
- \end{itemize}
- Für Smartphones: K-9 Mail
- \item
- Schlüsselerzeugung
- \item
- Öffentliche Schlüssel austauschen und prüfen
- \pause
- \medskip
- \item
- Schlüssel-Server
- \medskip
- \item
- Ende-zu-Ende-Verschlüsselung
- \item
- Auf verschlüsselte Nachrichten immer verschlüsselt antworten!
- \item
- Betreff-Zeilen werden nicht immer mit verschlüsselt.
- \item
- Die Verbindungsdaten werden nicht mit verschlüsselt.
- \end{itemize}
-\end{frame}
-
-\section{Fazit}
-
-\begin{frame}
- \showsection
-
- \begin{itemize}
- \item
- E-Mail-Verschlüsselung ist sinnvoll \dots
- \item
- \dots\ und machbar.
- \item
- Der richtige Umgang ist entscheidend.
- \medskip
- \arrowitem
- Sicherheitsbewußtsein ist entscheidend.
- \end{itemize}
-\end{frame}
-
-\end{document}
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-% es-20190110.pdf - Lecture Slides on Embedded Systems
-% Copyright (C) 2013, 2014, 2015, 2016, 2017, 2018, 2019 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-% README: Web-Interfaces, Software-Lizenzen
-
-\documentclass[10pt,t]{beamer}
-
-\usepackage{pgslides}
-\usepackage{rotating}
-\usepackage{tikz}
-\usepackage[obeyfamily=false,mathrm=mathsf,textrm=sffamily]{siunitx}
-
-\usepackage{multirow}
-
-\newrgbcolor{lightyellow}{0.95 0.85 0.0}
-\newrgbcolor{lightorange}{1.0 0.7 0.0}
-\newrgbcolor{lightgreen}{0.0 0.8 0.0}
-
-\newcommand{\underconstruction}{%
- \begin{picture}(0,0)
- \put(9,0.9){\makebox(0,0)[b]{\includegraphics[width=1.5cm]{Zeichen_123.pdf}}}
- \put(9,0.6){\makebox(0,0)[t]{\shortstack{Änderungen\\vorbehalten}}}
- \end{picture}}
-
-\title{Eingebettete Systeme}
-\author{Prof.\ Dr.\ rer.\ nat.\ Peter Gerwinski}
-\date{10.\ Januar 2019}
-
-\newcommand{\ItwoC}{I\raisebox{0.5ex}{\footnotesize 2}C}
-
-\begin{document}
-
-\maketitleframe
-
-\nosectionnonumber{\inserttitle}
-
-\begin{frame}
-
- \shownosectionnonumber
-
- \begin{itemize}
- \item[\textbf{1}] \textbf{Einführung}
- \hfill\makebox(0,0)[br]{\raisebox{2.25ex}{\url{https://gitlab.cvh-server.de/pgerwinski/es.git}}}
- \item[\textbf{2}] \textbf{Einführung in Unix}
- \item[\textbf{3}] \textbf{TCP/IP in der Praxis}
- \item[\textbf{4}] \textbf{Bus-Systeme}
- \item[\textbf{6}] \textbf{Echtzeit}
- \item[\textbf{7}] \textbf{Web-Interfaces}
- \item[\textbf{8}] \textbf{Software-Lizenzen}
- \vspace*{-\smallskipamount}
- \item[\textbf{\dots}]
- \end{itemize}
-
- \vspace*{-1cm plus 1filll}
-
- \underconstruction
-
-\end{frame}
-
-\setcounter{section}{6}
-
-\section{Web-Interfaces}
-\subsection{HTTP, HTML und CGI}
-
-\begin{frame}[fragile]
- \showsection
- \showsubsection
-
- \begin{lstlisting}[style=terminal]
- $ ¡nc -C localhost 80¿
- GET / HTTP/1.1
- Host: localhost
-
- HTTP/1.1 200 OK
- Date: Wed, 22 Nov 2017 19:58:55 GMT
- Server: Apache/2.4.25 (Debian)
- [...]
- Content-Type: text/html
-
- <html>
- <body>
- <h1 align="center">Vertiefung<br>Vertiefung Systemtechnik – Eingebettete Systeme</h1>
- <p align="center">23. November 2017</p>
- <p align="center">Prof. Dr. Peter Gerwinski</p>
- </body>
- </html>
- \end{lstlisting}
- \vspace*{-1cm}
-\end{frame}
-
-\begin{frame}[fragile]
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- \newterm{Hypertext Transport Protocol (HTTP)}: Netzwerk-Protokoll\\
- HTML-Inhalt + zusätzliche Daten
- \pause
- \item
- \newterm{Hypertext Markup Language (HTML)}: Markup-Sprache\\
- Inhalte + Formulare
- \begin{onlyenv}<2>
- \bigskip
- \begin{lstlisting}[language=html,gobble=10]
- <form action="/cgi-bin/welcome.cgi" method="get">
- Your name: <input type="text" name="name"><br>
- <input type="submit">
- </form>
- \end{lstlisting}
- \vspace*{-2cm}
- \end{onlyenv}
- \pause
- \item
- \newterm{Common Gateway Interface (CGI)}: Schnittstelle zu Programmen\\
- Liste von Variablen mit Werten
- \par\smallskip
- \begin{itemize}
- \item
- \newterm{GET-Methode}: Umgebungsvariable \lstinline{QUERY_STRING}
- \smallskip
- \item
- \newterm{POST-Methode}: Standardeingabe
- \end{itemize}
- \end{itemize}
- \bigskip
- \lstinline[style=terminal]{http://localhost/cgi-bin/welcome.cgi?name=Peter&answer=42}
-\end{frame}
-
-\subsection{Externe CGI-Skripte, GET und POST}
-
-\begin{frame}[fragile]
- \showsection
- \showsubsection
-
- \begin{itemize}\itemsep\medskipamount
- \item
- HTML-Formular verweist auf CGI-Programm ("`CGI-Skript"')
- \par
- \lstinline[language=html]{<form action="/cgi-bin/welcome.cgi"}
- \lstinline[language=html]{method="get">}
- \item
- Web-Server ruft CGI-Programm auf
- \item
- CGI-Programm wertet Variablenliste aus
- \begin{itemize}
- \item
- GET-Methode: Umgebungsvariable \lstinline{QUERY_STRING}
- \smallskip
- \item
- POST-Methode: Standardeingabe
- \end{itemize}
- \item
- CGI-Programm gibt HTTP-Header und Inhalt aus
- \par\smallskip
- \begin{lstlisting}[language=bash]
- #!/bin/bash
- echo Content-Type: text/plain
- echo
- echo "Hello, world!"
- \end{lstlisting}
- \item
- speziell: Inhalt ist \lstinline{text/html}
- \end{itemize}
-\end{frame}
-
-\subsection{Skript im Server: PHP}
-
-\begin{frame}[fragile]
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- Interpreter in Web-Server integriert
- \end{itemize}
-
- \bigskip
-
- \begin{lstlisting}[language=php]
- <html>
- <body>
- Hello, <?php echo $_POST["name"]; ?>!
- </body>
- </html>
- \end{lstlisting}
-\end{frame}
-
-\subsection{Server im Skript: Twisted}
-
-\begin{frame}[fragile]
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- individuell geschriebener Web-Server
- \item
- "`Baukasten"' in JavaScript: \file{node.js}
- \item
- "`Baukasten"' in Python: \file{Twisted}
- \end{itemize}
-
- \bigskip
-
- \begin{lstlisting}[language=python]
- def render_GET(self, request):
- return '<html><body><form method="POST">Your name: ' \
- + '<input name="name" type="text" /><br/>' \
- + '<input type="submit"></form></body></html>'
-
- def render_POST(self, request):
- return '<html><body>Hello, %s!</body></html>' \
- % (cgi.escape(request.args["name"][0]),)
- \end{lstlisting}
-\end{frame}
-
-\section{Software-Lizenzen}
-\subsectionnonumber{Vorab: Dies ist keine Rechtsdienstleistung!}
-
-\begin{frame}
- \showsection
- \pause
- \showsubsectionnonumber
-
- \textbf{\S\,2 RDG: Begriff der Rechtsdienstleistung}
-
- \smallskip
-
- (1) Rechtsdienstleistung ist jede Tätigkeit in
- {\only<3->{\color{red}}konkreten} fremden Angelegenheiten,
- sobald sie eine rechtliche Prüfung des
- {\only<3->{\color{red}}Einzelfalls} erfordert.
-
- \medskip
-
- \strut\hfill Quelle: \url{http://www.gesetze-im-internet.de/rdg/}
-
- \pause
- \pause
-
- \bigskip
-
- Konkreter Fall:
- \begin{itemize}
- \item
- Konkretes Programm unter Lizenz A
- \item
- Konkrete Bibliothek unter Lizenz B
- \item
- Beratung: Paßt das zusammen?
- \arrowitem
- Rechtsdienstleistung
- \end{itemize}
-\end{frame}
-
-\subsectionnonumber{Lizenz-Beratung unter Kollegen?}
-
-\begin{frame}
- \showsection
- \showsubsectionnonumber
-
- \textbf{\S\,6 RDG: Unentgeltliche Rechtsdienstleistungen}
-
- \smallskip
-
- (1) Erlaubt sind Rechtsdienstleistungen, die nicht im Zusammenhang mit einer entgeltlichen
- Tätigkeit stehen (unentgeltliche Rechtsdienstleistungen).
-
- \smallskip
-
- (2) Wer unentgeltliche Rechtsdienstleistungen außerhalb familiärer, nachbarschaftlicher oder
- ähnlich enger persönlicher Beziehungen erbringt, muss sicherstellen, dass die Rechtsdienstleistung
- durch eine Person, der die entgeltliche Erbringung dieser Rechtsdienstleistung erlaubt ist, durch
- eine Person mit Befähigung zum Richteramt oder unter Anleitung einer solchen Person erfolgt.
- [\,\dots]
-
- \medskip
-
- \strut\hfill Quelle: \url{http://www.gesetze-im-internet.de/rdg/}
-
- \pause
-
- \bigskip
-
- \begin{itemize}
- \arrowitem
- Nur allgemein beraten!\\
- Konkrete Fälle an Anwalt verweisen!
- \end{itemize}
-
-\end{frame}
-
-\subsection{Überblick}
-\newcommand{\lcr}{\includegraphics[width=0.5cm]{Copyright.pdf}}
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-\newcommand{\lcc}{\includegraphics[width=0.5cm]{creative-commons.png}}
-\newcommand{\lpd}{\includegraphics[width=0.5cm]{PD-icon.pdf}}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- Grundlage: Urheberrecht ($\approx$ Copyright) \hfill \lcr\\
- "`Wer Software schreibt, entscheidet, was damit geschehen darf."'
- \pause
- \medskip
- \item
- anderen etwas erlauben: Lizenz
- \pause
- \medskip
- \item
- "`gar keine Lizenz"' = alles verboten
- \end{itemize}
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{center}
- \begin{picture}(12,5)
- \put(5,5){\makebox(0,0){Software-Lizenz}}
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- \put(7,3.4){\makebox(0,0){frei / Open Source}}
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- \put(9,1.8){\makebox(0,0){Copyleft}}
- \end{picture}%
- \begin{onlyenv}<2->%
- \begin{picture}(0,0)(12,0)
- \color{darkgreen}
- \put(2.5,3.1){\vector(-1,-1){0.5}}
- \put(3.5,3.1){\vector(1,-1){0.5}}
- \put(2.0,2.3){\makebox(0,0){kommerziell}}
- \put(4.0,2.3){\makebox(0,0){gratis}}
- \put(4.0,1.0){\vector(-1,-1){0.5}}
- \put(5.0,1.0){\vector(1,-1){0.5}}
- \put(3.5,0.2){\makebox(0,0){kommerziell}}
- \put(5.5,0.2){\makebox(0,0){gratis}}
- \put(8.5,1.5){\vector(-1,-1){0.5}}
- \put(9.5,1.5){\vector(1,-1){0.5}}
- \put(8.0,0.7){\makebox(0,0){kommerziell}}
- \put(10.0,0.7){\makebox(0,0){gratis}}
- \end{picture}%
- \end{onlyenv}%
- \end{center}
-
-\end{frame}
-
-\subsection{Lizenzmodelle}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- Freie Software darf man
- \hfill\begin{picture}(0,0)
- \put(-1.8,-0.8){\includegraphics[width=2cm]{a-gnu-head.pdf}}
- \end{picture}
- \begin{itemize}
- \item[0.]
- benutzen,
- \item[1.]
- studieren und anpassen,
- \item[2.]
- weitergeben,
- \item[3.]
- weiterentwickeln und veröffentlichen.
- \end{itemize}
- \strut\hfill
- 4 Grundfreiheiten --
- \url{http://www.gnu.org/philosophy/free-sw}\\
- \pause
- \begin{picture}(0,0)
- \color{red}
- \put(6.95,1.85){\vector(-1,0){1.5}}
- \put(7.00,1.75){\vector(-1,-1){0.5}}
- \put(7.05,1.85){\makebox(0,0)[l]{Quelltext erforderlich!}}
- \end{picture}%
- \pause
- \medskip
- \item
- Open Source: i.\,w.\ dasselbe in 10 Kriterien
- \hfill\begin{picture}(0,0)
- \put(-1.2,-0.5){\includegraphics[width=1.1cm]{osi-logo.jpg}}
- \end{picture}\\
- Begründung: technisch statt philosophisch\\[\smallskipamount]
- \strut\hfill
- Definition:
- \url{http://www.opensource.org/docs/osd}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- Proprietäre Software / Closed Source\\
- Gegenteil von freier Software / Open Source
- \medskip
- \begin{itemize}
- \item
- Benutzen, Weitergeben und/oder Veröffentlichen\\
- erfordert individuelle Erlaubnis des Rechteinhabers
- \medskip
- \item
- Studieren, Anpassen und/oder Weiterentwickeln\\
- nur dem Rechteinhaber erlaubt
- \pause
- {\color{red}und/oder möglich\\
- (Quelltext erforderlich!)}
- \end{itemize}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{itemize}
- \item
- Freie Software
- \smallskip
- \begin{itemize}
- \item
- Copyleft\only<2->{:}\\[\smallskipamount]
- \begin{visibleenv}<2->
- Weitergabe nur unter gleichen Bedingungen erlaubt\\
- \textarrow\ Umwandlung in proprietäre Software nicht erlaubt
- \end{visibleenv}
- \medskip
- \item
- freizügig\only<3->{:}\\[\smallskipamount]
- \begin{visibleenv}<3->
- Weitergabe auch unter anderen Bedingungen erlaubt\\
- \textarrow\ Umwandlung in \only<4->{Copyleft- oder }proprietäre Software erlaubt
- \end{visibleenv}
- \begin{onlyenv}<5->
- \medskip
- \item
- Teil-Copyleft:\\[\smallskipamount]
- Linken mit proprietärer Software erlaubt
- \end{onlyenv}
- \end{itemize}
- \end{itemize}
-
-\end{frame}
-
-\subsection{Beispiel-Programme}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- \begin{center}
- \renewcommand{\arraystretch}{2.5}
- \begin{tabular}{|c||c|c|c|}\hline
- & \multirow{2}{*}{proprietär} & \multicolumn{2}{c|}{frei}\\\cline{3-4}
- & & freizügig & Copyleft \\\hline\hline
- \color{darkgreen}kommerziell
- & \color{structure}\visible<2->{\shortstack{\\\includegraphics[width=0.5cm]{Microsoft_Power_Point_2010.png}\\\small Microsoft PowerPoint}}
- & \color{structure}\visible<6->{\shortstack{\\\includegraphics[width=1.0cm]{721px-Pfs-logo.png}\\\small pfSense}}
- & \color{structure}\visible<5->{\shortstack{\\\includegraphics[width=0.8cm]{open-xchange.jpg}\\\small Open-Xchange}} \\\hline
- \color{darkgreen}gratis
- & \color{structure}\visible<4->{\shortstack{\\\includegraphics[width=0.8cm]{Adobe-Reader.png}\\\small Adobe Reader}}
- & \color{structure}\visible<6->{\shortstack{\\\includegraphics[width=0.5cm]{putty.png}\\\small PuTTY}}
- & \color{structure}\visible<3->{\shortstack{\\\includegraphics[width=0.5cm]{libreoffice-impress.pdf}\\\small LibreOffice Impress}} \\\hline
- \end{tabular}
- \end{center}
- \begin{onlyenv}<7->%
- \begin{picture}(0,0)(0,-0.5)
- \color{red}
- \put(7.38,1.38){$\updownarrow$}
- \put(9.8,1.38){$\updownarrow$}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<8->%
- \begin{picture}(0,0)(0,-0.7)
- \color{red}
- \put(6.3,2.7){$\longleftarrow$}
- \put(8.05,2.7){$\longrightarrow$}
- \end{picture}%
- \end{onlyenv}%
-
-\end{frame}
-
-\subsection{Beispiel-Lizenzen}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- \pause
- Freie Software / Open Source
- \begin{itemize}
- \item
- strenges Copyleft:
- GNU GPL, GNU FDL, CC BY-SA
- \pause
- \item
- Teil-Copyleft:
- GNU LGPL, Mozilla-Lizenz, Microsoft Public License
- \pause
- \item
- freizügig:
- Modifizierte BSD-Lizenz, Apache-Lizenz, CC BY,\\
- CC0, Public Domain
- \end{itemize}
- \pause
- \strut\hfill\url{http://www.gnu.org/licenses/license-list}
-
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Lizenz i.\,d.\,R.\ für jedes Programm anders
- \pause
- \medskip
- \item
- "`Normales"' Beispiel (Januar 2012):\\
- Adobe Reader EULA\\[\smallskipamount]
- Verwenden \only<3->{nur auf PCs }erlaubt\pause\pause,\\
- Studieren und Weitergeben nicht erlaubt\pause,\\
- Screenshots nicht erlaubt\\[\smallskipamount]
- \pause
- Der Software ist die Kommunikation mit Adobe\\
- und mit Werbeanbietern erlaubt.\\[\medskipamount]
- \pause
- \strut\hfill\url{http://www.adobe.com/products/eulas/reader/x/eula_de_de.html}
- \medskip
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Kontroverses Beispiel (Januar 2012):\\
- iBooks Author EULA\\[\smallskipamount]
- Layout für elektronische Bücher erstellen\\
- \pause
- \textarrow\ Buch darf nur über den iBooks Store verkauft werden\\[\medskipamount]
- \strut\hfill\url{http://venomousporridge.com/post/16126436616/}\\
- \strut\hfill\url{ibooks-author-eula-audacity}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Kontroverses Beispiel (September 2001):\\
- Microsoft FrontPage 2002 EULA\\[\smallskipamount]
- Webseiten erstellen\\
- \pause
- \textarrow\ Webseiten dürfen Microsoft nicht "`herabsetzen"'\\[\medskipamount]
- \strut\hfill\url{http://www.heise.de/newsticker/data/jes-21.09.01-001/}
- \end{itemize}
-
-\end{frame}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Generell: Gewährleistungsausschluß
-
- \bigskip
-
- Proprietäre Software
-
- \begin{itemize}
- \item
- Kontroverses Beispiel (Juli 2001):\\
- Microsoft Mobile Internet Toolkit EULA\\[\smallskipamount]
- Software erstellen\\
- \pause
- \textarrow\ Verbot, {\color{darkgreen}"`virale"'} Software
- \only<3->{(= Copyleft-Software) }zu erstellen \\
- \pause
- \pause
- \textarrow\ Verbot, Copyleft-Werkzeuge mit einzusetzen \\
- \textarrow\ Verbot, entwickelte Software gemeinsam mit Copyleft-Software\\
- \strut\phantom{\textarrow} einzusetzen oder zu vertreiben\\[\medskipamount]
- \strut\hfill\url{http://web.archive.org/web/20010626201507/}\\
- \strut\hfill\url{http://msdn.microsoft.com/downloads/eula_mit.htm}
- \end{itemize}
-
- % Nicht auf derselben CD: http://msdn.microsoft.com/downloads/eula_mit.htm, 22.7.2001
-
-\end{frame}
-
-\subsection{Copyleft}
-
-\begin{frame}
- \showsection
- \showsubsection
-
- Microsoft: Copyleft-Software ist {\color{darkgreen}"`viral"'}\\[\smallskipamount]
- \strut\hfill\url{http://web.archive.org/web/20010626201507/}\\
- \strut\hfill\url{http://msdn.microsoft.com/downloads/eula_mit.htm}
-
- \bigskip
-
- \begin{center}
- \color{structure}%
- \begin{onlyenv}<2->%
- \begin{picture}(10,5)
- \put(5,5){\makebox(0,0){Code aus fremder Software benutzen}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<3->%
- \begin{picture}(0,0)(10,0)
- \put(4.5,4.7){\vector(-1,-1){1}}
- \put(3.5,3.4){\makebox(0,0){\strut GPL-Software:}}
- \put(3.5,2.95){\makebox(0,0){\strut{\color{darkgreen}bedingt} erlaubt}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<4->%
- \begin{picture}(0,0)(10,0)
- \color{darkgreen}
- \put(3.0,2.7){\vector(0,-1){0.7}}
- \put(3.0,1.8){\makebox(0,0){\strut Gesamtwerk muß}}
- \put(3.0,1.35){\makebox(0,0){\strut unter GPL stehen}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<5->%
- \begin{picture}(0,0)(10,0)
- \put(5.5,4.7){\vector(1,-1){1}}
- \put(6.5,3.4){\makebox(0,0){\strut MS-Software:}}
- \put(6.5,2.95){\makebox(0,0){\strut{\color{red}nicht} erlaubt}}
- \end{picture}%
- \end{onlyenv}%
- \begin{onlyenv}<6->%
- \begin{picture}(0,0)(10,0)
- \color{black}
- \put(5.5,1.2){\makebox(0,0)[l]{\textarrow\
- \begin{minipage}[t]{5cm}
- Lizenzen lesen,\\
- sorgfältig auswählen
- \end{minipage}}}
- \end{picture}%
- \end{onlyenv}%
- \end{center}
- \vspace*{-1cm}
-
-\end{frame}
-
-\subsection{Fazit}
-
-\begin{frame}
- \showsection
- \showsubsection
- \begin{itemize}
- \item
- Generell: Vor Benutzung Lizenz lesen, durch Anwalt prüfen lassen
- \pause
- \item
- "`gar keine Lizenz"' = alles verboten
- \end{itemize}
-
- \pause
- Bearbeitung, Weitergabe und Mitverwendung
- \begin{itemize}
- \pause
- \item
- nicht erlaubt oder nicht möglich
- \textarrow\ proprietäre Software / Closed Source
- \pause
- \item
- erlaubt \textarrow\ freie Software / Open Source
- \begin{itemize}
- \pause
- \item
- bei Mitverwendung Lizenz übernehmen \textarrow\ Copyleft
- \pause
- \item
- Lizenz umwandelbar \textarrow\ freizügig
- \end{itemize}
- \end{itemize}
-
- \pause
-
- \bigskip
-
- {\large\color{structure}\bf Lizenz für diese Lehrmaterialien\par}
- \begin{itemize}
- \item
- Vortragsfolien und Skripte: Copyleft (CC-BY-SA 3.0 oder GNU GPL v3+)
- \item
- Beispiel-Programme: freizügig (modifizierte BSD-Lizenz)
- \end{itemize}
-
-\end{frame}
-
-\end{document}
diff --git a/20190110/libreoffice-impress.pdf b/20190110/libreoffice-impress.pdf
deleted file mode 100644
index df752f1d6d50d46ed2f1ed9964190ba4dad2fa75..0000000000000000000000000000000000000000
Binary files a/20190110/libreoffice-impress.pdf and /dev/null differ
diff --git a/20190110/logo-hochschule-bochum-cvh-text-v2.pdf b/20190110/logo-hochschule-bochum-cvh-text-v2.pdf
deleted file mode 120000
index 4aa99b8f81061aca6dcaf43eed2d9efef40555f8..0000000000000000000000000000000000000000
--- a/20190110/logo-hochschule-bochum-cvh-text-v2.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum-cvh-text-v2.pdf
\ No newline at end of file
diff --git a/20190110/logo-hochschule-bochum-cvh-text.pdf b/20190110/logo-hochschule-bochum-cvh-text.pdf
deleted file mode 100644
index 649b6a8b8f51ddc370a3626310c172fb3f8b0807..0000000000000000000000000000000000000000
Binary files a/20190110/logo-hochschule-bochum-cvh-text.pdf and /dev/null differ
diff --git a/20190110/logo-hochschule-bochum.pdf b/20190110/logo-hochschule-bochum.pdf
deleted file mode 120000
index b6b9491e370e499c9276918182cdb82cb311bcd1..0000000000000000000000000000000000000000
--- a/20190110/logo-hochschule-bochum.pdf
+++ /dev/null
@@ -1 +0,0 @@
-../common/logo-hochschule-bochum.pdf
\ No newline at end of file
diff --git a/20190110/open-xchange.jpg b/20190110/open-xchange.jpg
deleted file mode 100644
index d1e06bfb8722813f3e4dfff4c3a5da2016d594a2..0000000000000000000000000000000000000000
Binary files a/20190110/open-xchange.jpg and /dev/null differ
diff --git a/20190110/osi-logo.jpg b/20190110/osi-logo.jpg
deleted file mode 100644
index d9d29548b455ec1bb9ee4e7a9b9757c1567dc375..0000000000000000000000000000000000000000
Binary files a/20190110/osi-logo.jpg and /dev/null differ
diff --git a/20190110/pgslides.sty b/20190110/pgslides.sty
deleted file mode 120000
index 5be1416f4216f076aa268901f52a15d775e43f64..0000000000000000000000000000000000000000
--- a/20190110/pgslides.sty
+++ /dev/null
@@ -1 +0,0 @@
-../common/pgslides.sty
\ No newline at end of file
diff --git a/20190110/putty.png b/20190110/putty.png
deleted file mode 100644
index 63693df07f200e3e74119fed16237b438cac651b..0000000000000000000000000000000000000000
Binary files a/20190110/putty.png and /dev/null differ
diff --git a/20181129/make-zombies.c b/20190417/make-zombies-1.c
similarity index 95%
rename from 20181129/make-zombies.c
rename to 20190417/make-zombies-1.c
index 3e1418aa5567a38d274cbb2ba1588d7e765823d4..3626861d638c8ad6dc8c5c0831b9f5190e20a4dc 100644
--- a/20181129/make-zombies.c
+++ b/20190417/make-zombies-1.c
@@ -1,5 +1,5 @@
-#include <sys/wait.h>
#include <stdio.h>
+#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
@@ -18,12 +18,13 @@ int main(void){
// Der erste Kindprozess wartet 10 Sekunden und jeder
// weitere Kindprozess wartet 1 Sekunde k�rzer als der
// vorige.
- printf ("BRAINS! ");
+ printf ("%d BRAINS! ", i);
sleep(10-i);
exit(0); // Kindprozess erfolgreich beenden
}
}
-/*
+
+//
// hier kommt nur der Vaterprozess vorbei
for (i = 0; i < 10; ++i){
// Der Vaterprozess wartet nun, bis der Reihe nach jeder
@@ -33,7 +34,8 @@ int main(void){
// blockiert das erste Kind eine Bereinigung der Prozesstabelle
waitpid(pids[i], NULL, 0);
}
-*/
- while (1);
+//
+
+// while (1);
return 0; // Vaterprozess erfolgreich beenden
}
diff --git a/20181129/no-zombies.c b/20190417/make-zombies-2.c
similarity index 60%
rename from 20181129/no-zombies.c
rename to 20190417/make-zombies-2.c
index c7b04d78410a44b1d727cc5a966fb8580b9a3efa..d43b17e278e3df5c2373600753d6ac53d89f7af7 100644
--- a/20181129/no-zombies.c
+++ b/20190417/make-zombies-2.c
@@ -1,5 +1,5 @@
-#include <sys/wait.h>
#include <stdio.h>
+#include <sys/wait.h>
#include <stdlib.h>
#include <unistd.h>
@@ -18,22 +18,24 @@ int main(void){
// Der erste Kindprozess wartet 10 Sekunden und jeder
// weitere Kindprozess wartet 1 Sekunde k�rzer als der
// vorige.
- printf ("BRAINS! ");
- sleep(i);
+ printf ("%d BRAINS! ", i);
+ sleep(10-i);
exit(0); // Kindprozess erfolgreich beenden
}
}
- // hier kommt nur der Vaterprozess vorbei
- for (i = 0; i < 10; ++i){
- // Der Vaterprozess wartet nun, bis der Reihe nach jeder
- // seiner 10 Kindprozesse beendet ist. Leider wird auf das
- // Kind mit der l�ngsten Wartezeit zuerst gewartet. Obwohl
- // die anderen Kinder l�ngst erfolgreich beendet wurden,
- // blockiert das erste Kind eine Bereinigung der Prozesstabelle
- waitpid(pids[i], NULL, 0);
- }
+//
+// // hier kommt nur der Vaterprozess vorbei
+// for (i = 0; i < 10; ++i){
+// // Der Vaterprozess wartet nun, bis der Reihe nach jeder
+// // seiner 10 Kindprozesse beendet ist. Leider wird auf das
+// // Kind mit der l�ngsten Wartezeit zuerst gewartet. Obwohl
+// // die anderen Kinder l�ngst erfolgreich beendet wurden,
+// // blockiert das erste Kind eine Bereinigung der Prozesstabelle
+// waitpid(pids[i], NULL, 0);
+// }
+//
- while (1);
+// while (1);
return 0; // Vaterprozess erfolgreich beenden
}
diff --git a/20190417/make-zombies-3.c b/20190417/make-zombies-3.c
new file mode 100644
index 0000000000000000000000000000000000000000..82d671c075e1db7879e8b040f12a8543c0c7436a
--- /dev/null
+++ b/20190417/make-zombies-3.c
@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(void){
+ pid_t pids[10]; // Platz f�r 10 Prozess-IDs (die Kindprozesse)
+ int i; // Laufvariable
+
+ for (i = 0; i < 10; ++i) {
+ // Der Vaterprozess erzeugt nun einen Kindprozess,
+ // welcher unabh�ngig vom Vaterprozess mit der
+ // erneuten Ausf�hrung des Programms beginnt.
+ // Ein Kindprozess erzeugt keinen Fork von sich selbst.
+ pids[i] = fork();
+ if (pids[i] == 0) {
+ // dann befinden wir uns in einem der 10 Kindprozesse
+ // Der erste Kindprozess wartet 10 Sekunden und jeder
+ // weitere Kindprozess wartet 1 Sekunde k�rzer als der
+ // vorige.
+ printf ("%d BRAINS! ", i);
+ sleep(10-i);
+ exit(0); // Kindprozess erfolgreich beenden
+ }
+ }
+
+//
+// // hier kommt nur der Vaterprozess vorbei
+// for (i = 0; i < 10; ++i){
+// // Der Vaterprozess wartet nun, bis der Reihe nach jeder
+// // seiner 10 Kindprozesse beendet ist. Leider wird auf das
+// // Kind mit der l�ngsten Wartezeit zuerst gewartet. Obwohl
+// // die anderen Kinder l�ngst erfolgreich beendet wurden,
+// // blockiert das erste Kind eine Bereinigung der Prozesstabelle
+// waitpid(pids[i], NULL, 0);
+// }
+//
+
+ while (1);
+// return 0; // Vaterprozess erfolgreich beenden
+}
diff --git a/20190821/gedicht.txt b/20190821/gedicht.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7acacd5a0886bc962816aee843046db872c84342
--- /dev/null
+++ b/20190821/gedicht.txt
@@ -0,0 +1,4 @@
+Ich ging im Walde
+So für mich hin,
+Und nichts zu suchen,
+Das war mein Sinn.
diff --git a/20181011/hello.c b/20190821/hello.c
similarity index 100%
rename from 20181011/hello.c
rename to 20190821/hello.c
diff --git a/20190821/math-exercise b/20190821/math-exercise
new file mode 100755
index 0000000000000000000000000000000000000000..09a35580129c944de724b2f8a1ae5c1f8a8c2a30
Binary files /dev/null and b/20190821/math-exercise differ
diff --git a/20181108/hello.c b/20190821/math-exercise.c
similarity index 63%
rename from 20181108/hello.c
rename to 20190821/math-exercise.c
index b19d80e9bd0bd7c5ed8f54b20c6a50d9166f03ac..521b40e0d8fb86bbe35ed5c81df2273a01c77e49 100644
--- a/20181108/hello.c
+++ b/20190821/math-exercise.c
@@ -2,6 +2,6 @@
int main (void)
{
- printf ("Hello, world!\n");
+ printf ("2 + 2\n");
return 0;
}
diff --git a/20190821/math-exercise.result b/20190821/math-exercise.result
new file mode 100644
index 0000000000000000000000000000000000000000..b8626c4cff2849624fb67f87cd0ad72b163671ad
--- /dev/null
+++ b/20190821/math-exercise.result
@@ -0,0 +1 @@
+4
diff --git a/20181025/test.bc b/20190821/math-exercise.txt
similarity index 100%
rename from 20181025/test.bc
rename to 20190821/math-exercise.txt
diff --git a/20181018/calculate.bc b/20190821/mathematics-1
similarity index 66%
rename from 20181018/calculate.bc
rename to 20190821/mathematics-1
index 437242b4054c897e49b9b399f439c648721e4d00..8ff0784a1d3a7bb63d3a7513218cfbbdf0bda6c8 100755
--- a/20181018/calculate.bc
+++ b/20190821/mathematics-1
@@ -1,4 +1,2 @@
#!/usr/bin/bc
2 + 2
-2^64
-quit
diff --git a/20181018/listfiles b/20190821/mathematics-2.sh
similarity index 52%
rename from 20181018/listfiles
rename to 20190821/mathematics-2.sh
index 8f1e1031454c615b584526052a5bd3cd84ef9ac9..00f1f8bc88985b843c6c3333d0c45b7584a06df6 100755
--- a/20181018/listfiles
+++ b/20190821/mathematics-2.sh
@@ -1,2 +1,2 @@
#!/bin/bash
-ls -l
+echo 2 + 2
diff --git a/20190821/mathematics-3.sh b/20190821/mathematics-3.sh
new file mode 100755
index 0000000000000000000000000000000000000000..0f0675f214795aba31e97016e8271db4df2ec9aa
--- /dev/null
+++ b/20190821/mathematics-3.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+echo 2 + 2 | bc
diff --git a/20190821/mathematics-4.sh b/20190821/mathematics-4.sh
new file mode 100755
index 0000000000000000000000000000000000000000..0daada8cc7ca6756439850cb8870af85858214c9
--- /dev/null
+++ b/20190821/mathematics-4.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+2 + 2 | bc
diff --git a/20190821/mathematics-5.sh b/20190821/mathematics-5.sh
new file mode 100755
index 0000000000000000000000000000000000000000..6691b94750716f9fa200a76c1550fe09b6938569
--- /dev/null
+++ b/20190821/mathematics-5.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+./hello | bc
diff --git a/20190821/permissions-1.log b/20190821/permissions-1.log
new file mode 100644
index 0000000000000000000000000000000000000000..01f33eedb97b47fffbb755047e8584c2701a9a87
--- /dev/null
+++ b/20190821/permissions-1.log
@@ -0,0 +1,26 @@
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 4
+-rw-r--r-- 1 peter peter 14 Aug 21 10:34 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> chgrp
+audio cdrom floppy netdev plugdev staff
+bluetooth dialout fuse peter scanner video
+cassini/home/peter/bo/2019ss/es/20190821> chgrp staff test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 4
+-rw-r--r-- 1 peter staff 14 Aug 21 10:34 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> chmod g+w test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 4
+-rw-rw-r-- 1 peter staff 14 Aug 21 10:34 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> cat test.txt
+Hallo, Welt!
+cassini/home/peter/bo/2019ss/es/20190821> chmod ug-r test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 4
+--w--w-r-- 1 peter staff 13 Aug 21 10:38 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> chmod u+rw test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 4
+-rw--w-r-- 1 peter staff 13 Aug 21 10:38 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> cat test.txt
+Hallo, Welt!
diff --git a/20190821/permissions-2.log b/20190821/permissions-2.log
new file mode 100644
index 0000000000000000000000000000000000000000..3f980d4e88ce3aba6542fb58555ae8708feec445
--- /dev/null
+++ b/20190821/permissions-2.log
@@ -0,0 +1,14 @@
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 8
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw--w-r-- 1 peter staff 13 Aug 21 10:42 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> chmod 660 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 8
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-rw---- 1 peter staff 13 Aug 21 10:42 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> chmod 640 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 8
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r----- 1 peter staff 13 Aug 21 10:42 test.txt
diff --git a/20190821/permissions-3.log b/20190821/permissions-3.log
new file mode 100644
index 0000000000000000000000000000000000000000..4019bf44325525c161ca9c7655e0a21ee70b2217
--- /dev/null
+++ b/20190821/permissions-3.log
@@ -0,0 +1,26 @@
+cassini/home/peter/bo/2019ss/es/20190821> cat test.txt
+Hallo, Welt!
+cassini/home/peter/bo/2019ss/es/20190821> chmod +w test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 12
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rw-r----- 1 peter staff 13 Aug 21 10:42 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> chmod +x test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 12
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rwxr-x--x 1 peter staff 13 Aug 21 10:42 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> chmod 775 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 12
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rwxrwxr-x 1 peter staff 13 Aug 21 10:42 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> cat test.txt
+Hallo, Welt!
+cassini/home/peter/bo/2019ss/es/20190821> test.txt
+bash: test.txt: Kommando nicht gefunden.
+cassini/home/peter/bo/2019ss/es/20190821> ./test.txt
+./test.txt: Zeile 1: Hallo,: Kommando nicht gefunden.
diff --git a/20190821/permissions-4.log b/20190821/permissions-4.log
new file mode 100644
index 0000000000000000000000000000000000000000..f0513c00cfc06ecdebc7f50802776afb7221de53
--- /dev/null
+++ b/20190821/permissions-4.log
@@ -0,0 +1,14 @@
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 16
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rw-r--r-- 1 peter peter 1221 Aug 21 10:49 permissions-3.log
+-rwxrwxr-x 1 peter staff 6 Aug 21 10:49 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> cat test.txt
+ls -l
+cassini/home/peter/bo/2019ss/es/20190821> ./test.txt
+insgesamt 16
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rw-r--r-- 1 peter peter 1221 Aug 21 10:49 permissions-3.log
+-rwxrwxr-x 1 peter staff 6 Aug 21 10:49 test.txt
diff --git a/20190821/permissions-5.log b/20190821/permissions-5.log
new file mode 100644
index 0000000000000000000000000000000000000000..9f1605a62fb24b3b83219e6f2164717ccdd2fdc7
--- /dev/null
+++ b/20190821/permissions-5.log
@@ -0,0 +1,43 @@
+cassini/home/peter/bo/2019ss/es/20190821> gcc -Wall -O hello.c -o hello
+lcassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 36
+-rwxr-xr-x 1 peter peter 8640 Aug 21 10:51 hello
+-rw-r--r-- 1 peter peter 82 Aug 21 10:51 hello.c
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rw-r--r-- 1 peter peter 1221 Aug 21 10:49 permissions-3.log
+-rw-r--r-- 1 peter peter 658 Aug 21 10:50 permissions-4.log
+-rwxrwxr-x 1 peter staff 6 Aug 21 10:49 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> cat hello.c
+#include <stdio.h>
+
+int main (void)
+{
+ printf ("Hello, world!\n");
+ return 0;
+}
+cassini/home/peter/bo/2019ss/es/20190821> ./hello.c
+bash: ./hello.c: Keine Berechtigung
+cassini/home/peter/bo/2019ss/es/20190821> ./hello
+Hello, world!
+cassini/home/peter/bo/2019ss/es/20190821> cat hello
+ ((/lib64/ld-linux-x86-64.so.2GNU GNU�����6�p_�
+ Y0Q�N�1
+ M \ p "libc.so.6puts__cxa_finalize__libc_start_main_ITM_deregisterTMCloneTable__gmon_start___Jv_RegisterClasses_ITM@(( � � � � � � H�H��LIBC_2.2.5ui ��
+ H��t��H���5�
+ �%�
+ @�%�
+ h������%�
+3H�=�.��^H��H���PTL��H�
+ �DH�=y
+ H�y
+ UH)�H��H��vH�� H��t ]��fD]�@f.�H�=9
+ H�52
+����H���]��H��H� ��@f.�H�=a H�?u H��t]��f�]�@f.��=� u'H�=� UH��tH�=� �
+ �^���fDH�I H��t�UH����]�@���H�H�=������H��fDAWAVA��AUATL�%� UH�-� SI��I��L)�H�H���/���H��t 1��L��L��D��A��H��H9�u�H�[]A\A]A^A_Ðf.���H�H��Hello, world!;8������������TL����l��������$zR�����+zR�$`��� FJ
+ �?;*3$"DX��\����DD���o�x��B�E �B(�H0�H8�M@r8A0A(B BB������@0
+�
+ f( GCC: (Debian 6.3.0-18+deb9u1) 6.3.0 201705168Tt�� @
+
+ �d @- � I[0 'Db� � �( �P��e�8 ��+�0 ��� �0 � "�
+ 0crtstuff.c__JCR_LIST__deregister_tm_clones__do_global_dtors_auxcompleted.6972__do_global_dtors_aux_fini_array_entryframe_dummy__frame_dummy_init_array_entryhello.c__FRAME_END____JCR_END____init_array_end_DYNAMIC__init_array_start__GNU_EH_FRAME_HDR_GLOBAL_OFFSET_TABLE___libc_csu_fini_ITM_deregisterTMCloneTableputs@@GLIBC_2.2.5_edata__libc_start_main@@GLIBC_2.2.5__data_start__gmon_start____dso_handle_IO_stdin_used__libc_csu_init__bss_startmain_Jv_RegisterClasses__TMC_END___ITM_registerTMCloneTable__cxa_finalize@@GLIBC_2.2.5.symtab.strtab.shstrtab.interp.note.ABI-tag.note.gnu.build-id.gnu.hash.dynsym.dynstr.gnu.version.gnu.�� �� 0 00-``/d�0�cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/permissions-6.log b/20190821/permissions-6.log
new file mode 100644
index 0000000000000000000000000000000000000000..9c962dccc7683dce0270f2489874989f635f268b
--- /dev/null
+++ b/20190821/permissions-6.log
@@ -0,0 +1,24 @@
+cassini/home/peter/bo/2019ss/es/20190821> ls -l
+insgesamt 40
+-rwxr-xr-x 1 peter peter 8640 Aug 21 10:51 hello
+-rw-r--r-- 1 peter peter 82 Aug 21 10:51 hello.c
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rw-r--r-- 1 peter peter 1221 Aug 21 10:49 permissions-3.log
+-rw-r--r-- 1 peter peter 658 Aug 21 10:50 permissions-4.log
+-rw-r--r-- 1 peter peter 3115 Aug 21 10:51 permissions-5.log
+-rwxrwxr-x 1 peter staff 6 Aug 21 10:49 test.txt
+cassini/home/peter/bo/2019ss/es/20190821> file hello test.txt
+hello: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=f7fc06bda5be36fd705f05e70b59183051d24eda, not stripped
+test.txt: ASCII text
+cassini/home/peter/bo/2019ss/es/20190821> file *
+hello: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=f7fc06bda5be36fd705f05e70b59183051d24eda, not stripped
+hello.c: C source, ASCII text
+permissions-1.log: ASCII text
+permissions-2.log: ASCII text
+permissions-3.log: ASCII text
+permissions-4.log: ASCII text
+permissions-5.log: C source, UTF-8 Unicode text, with very long lines
+test.txt: ASCII text
+cassini/home/peter/bo/2019ss/es/20190821> cat test.txt
+ls -l
diff --git a/20190821/permissions-7.log b/20190821/permissions-7.log
new file mode 100644
index 0000000000000000000000000000000000000000..b43d71d38d050fd756e7310693c3721f4bd7c4ae
--- /dev/null
+++ b/20190821/permissions-7.log
@@ -0,0 +1,18 @@
+cassini/home/peter/bo/2019ss/es/20190821> ./hello.c
+bash: ./hello.c: Keine Berechtigung
+cassini/home/peter/bo/2019ss/es/20190821> cat hello.c
+#include <stdio.h>
+
+int main (void)
+{
+ printf ("Hello, world!\n");
+ return 0;
+}
+cassini/home/peter/bo/2019ss/es/20190821> ./hello.c
+bash: ./hello.c: Keine Berechtigung
+cassini/home/peter/bo/2019ss/es/20190821> chmod +x hello.c
+cassini/home/peter/bo/2019ss/es/20190821> ./hello.c
+./hello.c: Zeile 3: Syntaxfehler beim unerwarteten Wort `('
+./hello.c: Zeile 3: `int main (void)'
+cassini/home/peter/bo/2019ss/es/20190821> int main
+bash: int: Kommando nicht gefunden.
diff --git a/20190821/permissions-8.log b/20190821/permissions-8.log
new file mode 100644
index 0000000000000000000000000000000000000000..c033098c28e4fff90a4401a2b88447d05277d343
--- /dev/null
+++ b/20190821/permissions-8.log
@@ -0,0 +1,18 @@
+cassini/home/peter/bo/2019ss/es/20190821> chmod +x hello.c
+cassini/home/peter/bo/2019ss/es/20190821> file hello.c
+hello.c: C source, ASCII text
+cassini/home/peter/bo/2019ss/es/20190821> chmod -x hello.c
+cassini/home/peter/bo/2019ss/es/20190821> file hello.c
+hello.c: C source, ASCII text
+cassini/home/peter/bo/2019ss/es/20190821> mv hello.c hello.pusemuckel
+cassini/home/peter/bo/2019ss/es/20190821> file hello.pusemuckel
+hello.pusemuckel: C source, ASCII text
+cassini/home/peter/bo/2019ss/es/20190821> mv hello.pusemuckel hello.cpp
+cassini/home/peter/bo/2019ss/es/20190821> file hello.cpp
+hello.cpp: C source, ASCII text
+cassini/home/peter/bo/2019ss/es/20190821> mv hello.cpp hello.pas
+cassini/home/peter/bo/2019ss/es/20190821> file hello.cpp
+hello.cpp: cannot open `hello.cpp' (No such file or directory)
+cassini/home/peter/bo/2019ss/es/20190821> file hello.pas
+hello.pas: C source, ASCII text
+cassini/home/peter/bo/2019ss/es/20190821> mv hello.pas hello.c
diff --git a/20190821/permissions-9.log b/20190821/permissions-9.log
new file mode 100644
index 0000000000000000000000000000000000000000..0f01080371598ac2f33154ba6d6be8f8ffcfbd35
--- /dev/null
+++ b/20190821/permissions-9.log
@@ -0,0 +1,20 @@
+cassini/home/peter/bo/2019ss/es/20190821> ls -l tolles-bild.jpg
+-rwxrwxr-x 1 peter staff 6 Aug 21 10:49 tolles-bild.jpg
+cassini/home/peter/bo/2019ss/es/20190821> cat tolles-bild.jpg
+ls -l
+cassini/home/peter/bo/2019ss/es/20190821> ./tolles-bild.jpg
+insgesamt 56
+-rwxr-xr-x 1 peter peter 8640 Aug 21 10:51 hello
+-rw-r--r-- 1 peter peter 82 Aug 21 10:51 hello.c
+-rw-r--r-- 1 peter peter 1104 Aug 21 10:43 permissions-1.log
+-rw-r--r-- 1 peter peter 641 Aug 21 10:47 permissions-2.log
+-rw-r--r-- 1 peter peter 1221 Aug 21 10:49 permissions-3.log
+-rw-r--r-- 1 peter peter 658 Aug 21 10:50 permissions-4.log
+-rw-r--r-- 1 peter peter 3115 Aug 21 10:51 permissions-5.log
+-rw-r--r-- 1 peter peter 1416 Aug 21 10:54 permissions-6.log
+-rw-r--r-- 1 peter peter 608 Aug 21 10:57 permissions-7.log
+-rw-r--r-- 1 peter peter 959 Aug 21 10:59 permissions-8.log
+-rwxrwxr-x 1 peter staff 6 Aug 21 10:49 test.txt
+-rwxrwxr-x 1 peter staff 6 Aug 21 10:49 tolles-bild.jpg
+cassini/home/peter/bo/2019ss/es/20190821> file tolles-bild.jpg
+tolles-bild.jpg: ASCII text
diff --git a/20190821/pipes-1.log b/20190821/pipes-1.log
new file mode 100644
index 0000000000000000000000000000000000000000..919438c2f11037ceb167e0a44ee9ff9aeb187abb
--- /dev/null
+++ b/20190821/pipes-1.log
@@ -0,0 +1,17 @@
+cassini/home/peter/bo/2019ss/es/20190821> cat math-exercise.c
+#include <stdio.h>
+
+int main (void)
+{
+ printf ("2 + 2\n");
+ return 0;
+}
+cassini/home/peter/bo/2019ss/es/20190821> gcc -Wall -O math-exercise.c -o math-exercise
+cassini/home/peter/bo/2019ss/es/20190821> ./math-exercise
+2 + 2
+cassini/home/peter/bo/2019ss/es/20190821> ./math-exercise | bc
+4
+cassini/home/peter/bo/2019ss/es/20190821> cat | bc
+2 + 2
+4
+cassini/home/peter/bo/2019ss/es/20190821> cat > pipes-1.log
diff --git a/20190821/programming-1.sh b/20190821/programming-1.sh
new file mode 100755
index 0000000000000000000000000000000000000000..bc110d19b3d6e1ec3afc527bc060326c7c1116d2
--- /dev/null
+++ b/20190821/programming-1.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if grep World *.c > /dev/null; then
+ echo "gefunden"
+else
+ echo "nicht gefunden"
+fi
diff --git a/20190821/programming-10.sh b/20190821/programming-10.sh
new file mode 100755
index 0000000000000000000000000000000000000000..3864bd2d126b7fa5530b2875cff3fd34a851065d
--- /dev/null
+++ b/20190821/programming-10.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+while read x; do
+ echo "Sie sagten: $x"
+done
diff --git a/20190821/programming-2.sh b/20190821/programming-2.sh
new file mode 100755
index 0000000000000000000000000000000000000000..1f6e9a653c10f48afee52cf0d133cf757cd74ae4
--- /dev/null
+++ b/20190821/programming-2.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if grep "$1" *.c > /dev/null; then
+ echo "gefunden"
+else
+ echo "nicht gefunden"
+fi
diff --git a/20190821/programming-3.sh b/20190821/programming-3.sh
new file mode 100755
index 0000000000000000000000000000000000000000..901908ade08cfe71bdbdca0e51317420da223abc
--- /dev/null
+++ b/20190821/programming-3.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if grep "$1" *."$2" > /dev/null; then
+ echo "$3"
+else
+ echo "$4"
+fi
diff --git a/20190821/programming-4.sh b/20190821/programming-4.sh
new file mode 100755
index 0000000000000000000000000000000000000000..a4ea14b29cbffab91eb00442436a5c4a39655d95
--- /dev/null
+++ b/20190821/programming-4.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if grep "$1" *."$2" > /dev/null; then
+ echo "${3:-gefunden}"
+else
+ echo "${4:-nicht gefunden}"
+fi
diff --git a/20190821/programming-5.sh b/20190821/programming-5.sh
new file mode 100755
index 0000000000000000000000000000000000000000..952186ed866cef5257101be282f1b08171c7fc69
--- /dev/null
+++ b/20190821/programming-5.sh
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if grep "$1" "$@" > /dev/null; then
+ echo "gefunden"
+else
+ echo "nicht gefunden"
+fi
diff --git a/20190821/programming-6.sh b/20190821/programming-6.sh
new file mode 100755
index 0000000000000000000000000000000000000000..44ceb58f8b3a0de69039783b3d00a6d3038e139f
--- /dev/null
+++ b/20190821/programming-6.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+pattern="$1"
+shift
+
+if grep "$pattern" "$@" > /dev/null; then
+ echo "gefunden"
+else
+ echo "nicht gefunden"
+fi
diff --git a/20190821/programming-7.sh b/20190821/programming-7.sh
new file mode 100755
index 0000000000000000000000000000000000000000..dd3f85b35aa5fefb86c477c38c28cd89dba53724
--- /dev/null
+++ b/20190821/programming-7.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+for x in Dies Das Jenes; do
+ echo $x
+done
diff --git a/20190821/programming-8.sh b/20190821/programming-8.sh
new file mode 100755
index 0000000000000000000000000000000000000000..42e67bdb82e59fd829fa704a660eff731f05fe97
--- /dev/null
+++ b/20190821/programming-8.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+for x in Dies Das Jenes "Und so weiter"; do
+ echo "$x"
+done
diff --git a/20190821/programming-9.sh b/20190821/programming-9.sh
new file mode 100755
index 0000000000000000000000000000000000000000..72a119cdb369c1259558c7fb458fff0d4ccce437
--- /dev/null
+++ b/20190821/programming-9.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+for x in Dies Das Jenes 'Und so weiter'; do
+ echo '$x'
+done
diff --git a/20190821/scripts-1.log b/20190821/scripts-1.log
new file mode 100644
index 0000000000000000000000000000000000000000..968168df019f70def1e3872d20bdf442486db44e
--- /dev/null
+++ b/20190821/scripts-1.log
@@ -0,0 +1,12 @@
+cassini/home/peter/bo/2019ss/es/20190821> cat mathematics
+#!/usr/bin/bc
+2 + 2
+cassini/home/peter/bo/2019ss/es/20190821> chmod +x mathematics
+cassini/home/peter/bo/2019ss/es/20190821> ./mathematics
+bc 1.06.95
+Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
+This is free software with ABSOLUTELY NO WARRANTY.
+For details type `warranty'.
+4
+cassini/home/peter/bo/2019ss/es/20190821> file mathematics
+mathematics: a /usr/bin/bc script, ASCII text executable
diff --git a/20190821/scripts-10.log b/20190821/scripts-10.log
new file mode 100644
index 0000000000000000000000000000000000000000..fb29d688a9acb643c09243166ae8760fd3ee8f3b
--- /dev/null
+++ b/20190821/scripts-10.log
@@ -0,0 +1,15 @@
+cassini/home/peter/bo/2019ss/es/20190821> echo $file_template
+cassini/home/peter/bo/2019ss/es/20190821> file_template=programming-10.c
+cassini/home/peter/bo/2019ss/es/20190821> echo $file_template
+programming-10.c
+cassini/home/peter/bo/2019ss/es/20190821> echo $file_template | sed -e 's/.*\.\(.*$\)/\1/'
+c
+cassini/home/peter/bo/2019ss/es/20190821> echo $file_template | sed -e 's/\(.*\)\..*$/\1/'
+programming-10
+cassini/home/peter/bo/2019ss/es/20190821> echo $file_template | sed -e 's/a/o/'
+progromming-10.c
+cassini/home/peter/bo/2019ss/es/20190821> echo $file_template | sed -e 's/[aeiou]/u/'
+prugramming-10.c
+cassini/home/peter/bo/2019ss/es/20190821> echo $file_template | sed -e 's/[aeiou]/u/g'
+prugrummung-10.c
+cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/scripts-2.log b/20190821/scripts-2.log
new file mode 100644
index 0000000000000000000000000000000000000000..2a32cb31fd0c22ea86bbe736b92aae920e76f316
--- /dev/null
+++ b/20190821/scripts-2.log
@@ -0,0 +1,24 @@
+cassini/home/peter/bo/2019ss/es/20190821> cat hello.c
+#include <stdio.h>
+
+int main (void)
+{
+ printf ("Hello, world!\n");
+ return 0;
+}
+cassini/home/peter/bo/2019ss/es/20190821> grep world *.c
+hello.c: printf ("Hello, world!\n");
+cassini/home/peter/bo/2019ss/es/20190821> grep World *.c
+cassini/home/peter/bo/2019ss/es/20190821> if grep world *.c; then echo "gefunden"; fihello.c: printf ("Hello, world!\n");
+gefunden
+cassini/home/peter/bo/2019ss/es/20190821> if grep World *.c; then echo "gefunden"; fi
+cassini/home/peter/bo/2019ss/es/20190821> if grep World *.c > grep.log; then echo "gefunden"; fi
+cassini/home/peter/bo/2019ss/es/20190821> if grep world *.c > grep.log; then echo "gefunden"; fi
+gefunden
+cassini/home/peter/bo/2019ss/es/20190821> cat grep.log
+hello.c: printf ("Hello, world!\n");
+cassini/home/peter/bo/2019ss/es/20190821> rm grep.log
+cassini/home/peter/bo/2019ss/es/20190821> if grep world *.c > /dev/null; then echo "gefunden"; fi
+gefunden
+cassini/home/peter/bo/2019ss/es/20190821> cat /dev/null
+cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/scripts-3.log b/20190821/scripts-3.log
new file mode 100644
index 0000000000000000000000000000000000000000..004eaa5a9e35da2fc53db8464b5dbc9074d7e184
--- /dev/null
+++ b/20190821/scripts-3.log
@@ -0,0 +1,2 @@
+cassini/home/peter/bo/2019ss/es/20190821> if grep World *.c > /dev/null; then echo "gefunden"; else echo "nicht gefunden"; fi
+nicht gefunden
diff --git a/20190821/scripts-4.log b/20190821/scripts-4.log
new file mode 100644
index 0000000000000000000000000000000000000000..afa9e33a173f0fd6909f7d9d03aef36a9ff2469b
--- /dev/null
+++ b/20190821/scripts-4.log
@@ -0,0 +1,20 @@
+#!/bin/bash
+
+if grep "$1" *."$2" > /dev/null; then
+ echo "$3"
+else
+ echo "$4"
+fi
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-3.sh Hello c gefunden "nicht gefunden"
+gefunden
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-3.sh Schlumpf c gefunden "nicht gefunden"
+nicht gefunden
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-3.sh Schlumpf sh gefunden "nicht gefunden"
+nicht gefunden
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-3.sh World txt gefunden "nicht gefunden"
+nicht gefunden
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-3.sh World txt gefunden Nanu?Nanu?
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-3.sh World pusemuckel gefunden Nanu?
+grep: *.pusemuckel: Datei oder Verzeichnis nicht gefunden
+Nanu?
+cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/scripts-5.log b/20190821/scripts-5.log
new file mode 100644
index 0000000000000000000000000000000000000000..971e30e5b05ed684189591c7d13f74df16b7b4e0
--- /dev/null
+++ b/20190821/scripts-5.log
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+if grep "$1" *."$2" > /dev/null; then
+ echo "${3:-gefunden}"
+else
+ echo "${4:-nicht gefunden}"
+fi
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-4.sh World c found
+nicht gefunden
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-4.sh world c found
+found
+cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/scripts-6.log b/20190821/scripts-6.log
new file mode 100644
index 0000000000000000000000000000000000000000..c280128c5f040227bbaa107b6b35b7d2d767b2bb
--- /dev/null
+++ b/20190821/scripts-6.log
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+if grep "$1" "$@" > /dev/null; then
+ echo "gefunden"
+else
+ echo "nicht gefunden"
+fi
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-5.sh world *.c
+grep: world: Datei oder Verzeichnis nicht gefunden
+nicht gefunden
diff --git a/20190821/scripts-7.log b/20190821/scripts-7.log
new file mode 100644
index 0000000000000000000000000000000000000000..d58445bb033c83abafd8de58578f92d896631590
--- /dev/null
+++ b/20190821/scripts-7.log
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+pattern="$1"
+shift
+
+if grep "$pattern" "$@" > /dev/null; then
+ echo "gefunden"
+else
+ echo "nicht gefunden"
+fi
+cassini/home/peter/bo/2019ss/es/20190821> echo ./programming-6.sh world *.c
+./programming-6.sh world hello.c math-exercise.c
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-6.sh world *.c
+gefunden
+cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/scripts-8.log b/20190821/scripts-8.log
new file mode 100644
index 0000000000000000000000000000000000000000..2d351163799e85c03a8dc85a70195dee808ac304
--- /dev/null
+++ b/20190821/scripts-8.log
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+while read x; do
+ echo "Sie sagten: $x"
+done
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-
+programming-10.sh programming-3.sh programming-6.sh programming-9.sh
+programming-1.sh programming-4.sh programming-7.sh
+programming-2.sh programming-5.sh programming-8.sh
+cassini/home/peter/bo/2019ss/es/20190821> ./programming-10.sh
+Hallo?
+Sie sagten: Hallo?
+Ist da jemand?
+Sie sagten: Ist da jemand?
+Schön.
+Sie sagten: Schön.
+cassini/home/peter/bo/2019ss/es/20190821> cat > gedicht.txt
+Ich ging im Walde
+So für mich hin,
+Und nichts zu suchen,
+Das war mein Sinn.
+cassini/home/peter/bo/2019ss/es/20190821> cat gedicht.txt
+Ich ging im Walde
+So für mich hin,
+Und nichts zu suchen,
+Das war mein Sinn.
+cassini/home/peter/bo/2019ss/es/20190821> cat gedicht.txt | ./programming-10.sh
+Sie sagten: Ich ging im Walde
+Sie sagten: So für mich hin,
+Sie sagten: Und nichts zu suchen,
+Sie sagten: Das war mein Sinn.
+cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/scripts-9.log b/20190821/scripts-9.log
new file mode 100644
index 0000000000000000000000000000000000000000..1d23d8df953e4b7382957a3e53a7d7e25b9c7f4c
--- /dev/null
+++ b/20190821/scripts-9.log
@@ -0,0 +1,9 @@
+cassini/home/peter/bo/2019ss/es/20190821> which vicat
+/home/peter/usr/bin/vicat
+cassini/home/peter/bo/2019ss/es/20190821> cat $(which vicat)
+#!/bin/bash
+/usr/bin/vim -X -c 'set sw=2' -c 'set expandtab' -c 'set ai' -c 'set nowrap' "$@"
+clear
+shift $(( $# - 1 ))
+cat "$1"
+cassini/home/peter/bo/2019ss/es/20190821>
diff --git a/20190821/test.txt b/20190821/test.txt
new file mode 100755
index 0000000000000000000000000000000000000000..7bcac8bfc897131206cb32ba88d805ed03dca042
--- /dev/null
+++ b/20190821/test.txt
@@ -0,0 +1 @@
+ls -l
diff --git a/20190821/tolles-bild.jpg b/20190821/tolles-bild.jpg
new file mode 100755
index 0000000000000000000000000000000000000000..7bcac8bfc897131206cb32ba88d805ed03dca042
--- /dev/null
+++ b/20190821/tolles-bild.jpg
@@ -0,0 +1 @@
+ls -l
diff --git a/20181108/vic b/20190821/vic
similarity index 95%
rename from 20181108/vic
rename to 20190821/vic
index 5eea936e6eed95c1a0a7afc03ee288fba9995d8f..b488615b33bcf72137c8e0bc0faf2196a54b1a62 100755
--- a/20181108/vic
+++ b/20190821/vic
@@ -1,6 +1,6 @@
#!/bin/bash
-debug=false
+debug=true
if [ $# -gt 0 ]; then
$debug && echo "parameters = $@"
@@ -22,7 +22,7 @@ file_number=$(echo $file_base | sed -e 's/^.*-\([0-9]*$\)/\1/')
file_stem=$(echo $file_base | sed -e 's/^\(.*\)-[0-9]*$/\1/')
$debug && echo "file_number = $file_number"
-$debug && echo "file_number = $file_stem"
+$debug && echo "file_stem = $file_stem"
while [ -e "$file_stem-$file_number.$file_extension" ]; do
file_number=$((file_number + 1))
diff --git a/README.md b/README.md
deleted file mode 100644
index e8186f17332486ef0210f31264cad2c1cc22b48d..0000000000000000000000000000000000000000
--- a/README.md
+++ /dev/null
@@ -1,64 +0,0 @@
-Eingebettete Systeme
-====================
-
-Lehrveranstaltung im Wintersemester 2018/19
-Hochschule Bochum, Campus Velbert/Heiligenhaus
-Prof. Dr. rer. nat. Peter Gerwinski
-
-Copyright © 2012–2018 Peter Gerwinski
-
-**Diese Lehrmaterialien sind freie Software.**
-Sie dürfen diese gemäß den jeweils angegebenen Lizenzen
-([CC-BY-SA 3.0](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/CC-BY-SA-3.0),
-[GNU GPL 3+](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/GNU-GPL-3),
-[modified BSD License](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/BSD-MODIFIED))
-studieren, kopieren, modifizieren und/oder weitergeben.
-Für Details siehe [common/README](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/README).
-
-Vortragsfolien:
----------------
- * [11.10.2018: Einführung: eingebettete Systeme, Unix-Kommandozeile](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181011/es-20181011.pdf)
- * [18.10.2018: Unix: Umgang mit Dateisystemen](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181018/es-20181018.pdf)
- * [25.10.2018: Unix: grep, Ein- und Ausgabeströme, Pipes, Verzweigungen und Schleifen](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181025/es-20181025.pdf)
- * [08.11.2018: TCP/IP in der Praxis: Netzzugang, IP-Adressen, Ports, Protokolle](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181108/es-20181108.pdf)
- * [22.11.2018: TCP/IP in der Praxis: SSH, X11, GNU screen, Programmierung; Bus-Systeme](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181122/es-20181122.pdf)
- * [alle in 1 Datei](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/es-slides-2018ws.pdf)
-
-Tafelbilder:
-------------
- * [08.11.2018: interne IP-Adressen, TCP/IP-Schichtenmodell](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181108/photo-20181108-184032.jpg)
- * [15.11.2018: Routing, NAT](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181115/photo-20181115-185731.jpg)
- * [15.11.2018: Netzmasken, private IP-Bereiche](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/20181115/photo-20181115-185835.jpg)
-
-Literatur:
-----------
- * [Skript: Netzwerktechnik](http://www.peter.gerwinski.de/download/net-2013ss.tar.gz]
-
-Original-Materialien einschließlich Beispiel-Programme und LaTeX-Quelltexte:
-----------------------------------------------------------------------------
- * [common – gemeinsame Dateien für Skript und Vortragsfolien](https://gitlab.cvh-server.de/pgerwinski/es/tree/master/common)
- * [201????? – Vortragsfolien und Beispiele](https://gitlab.cvh-server.de/pgerwinski/es/tree/master)
- * [branch 2017ws – vollständige Lehrmaterialien vom Wintersemester 2017/18](https://gitlab.cvh-server.de/pgerwinski/es/tree/2017ws)
-
-
-Embedded Systems
-================
-
-Course in winter semester 2018–19
-Bochum University of Applied Sciences, Campus Velbert/Heiligenhaus
-Prof. Dr. rer. nat. Peter Gerwinski
-
-Copyright © 2012–2018 Peter Gerwinski
-
-**These teaching materials are Free Software.**
-You may study, copy, modify, and/or distribute them
-according to their respective licences
-([CC-BY-SA 3.0](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/CC-BY-SA-3.0),
-[GNU GPL 3+](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/GNU-GPL-3),
-[modified BSD License](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/BSD-MODIFIED)).
-See the file [common/README](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/README) for details.
-
- * [common – common files for lecture notes and slides](https://gitlab.cvh-server.de/pgerwinski/es/tree/master/common)
- * [201????? – slides and examples](https://gitlab.cvh-server.de/pgerwinski/es/tree/master)
- * [es-slides-2018ws.pdf – all slides in 1 file](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/es-slides-2018ws.pdf)
- * [branch 2017ws – complete teaching materials from winter semester 2017–18](https://gitlab.cvh-server.de/pgerwinski/es/tree/2017ws)
diff --git a/common/BSD-MODIFIED b/common/BSD-MODIFIED
deleted file mode 100644
index 3e9afec081b72c48de30b4067bc3d68536906a5d..0000000000000000000000000000000000000000
--- a/common/BSD-MODIFIED
+++ /dev/null
@@ -1,29 +0,0 @@
-Modified BSD License
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- 3. The name of the author may not be used to endorse or promote
- products derived from this software without specific prior
- written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
-DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
-GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
-IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
-IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/common/CC-BY-SA-3.0 b/common/CC-BY-SA-3.0
deleted file mode 100644
index 43633f5d8ca3ee4c454bc0d64fded403267f6e6f..0000000000000000000000000000000000000000
--- a/common/CC-BY-SA-3.0
+++ /dev/null
@@ -1,418 +0,0 @@
-Creative Commons Attribution-ShareAlike 3.0 Unported
-
- CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT
- PROVIDE LEGAL SERVICES. DISTRIBUTION OF THIS LICENSE DOES NOT
- CREATE AN ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS
- PROVIDES THIS INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS
- MAKES NO WARRANTIES REGARDING THE INFORMATION PROVIDED, AND
- DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM ITS USE.
-
-License
-
-THE WORK (AS DEFINED BELOW) IS PROVIDED UNDER THE TERMS OF THIS
-CREATIVE COMMONS PUBLIC LICENSE ("CCPL" OR "LICENSE"). THE WORK IS
-PROTECTED BY COPYRIGHT AND/OR OTHER APPLICABLE LAW. ANY USE OF THE
-WORK OTHER THAN AS AUTHORIZED UNDER THIS LICENSE OR COPYRIGHT LAW IS
-PROHIBITED.
-
-BY EXERCISING ANY RIGHTS TO THE WORK PROVIDED HERE, YOU ACCEPT AND
-AGREE TO BE BOUND BY THE TERMS OF THIS LICENSE. TO THE EXTENT THIS
-LICENSE MAY BE CONSIDERED TO BE A CONTRACT, THE LICENSOR GRANTS YOU
-THE RIGHTS CONTAINED HERE IN CONSIDERATION OF YOUR ACCEPTANCE OF
-SUCH TERMS AND CONDITIONS.
-
-1. Definitions
-
- a. "Adaptation" means a work based upon the Work, or upon the
- Work and other pre-existing works, such as a translation,
- adaptation, derivative work, arrangement of music or other
- alterations of a literary or artistic work, or phonogram or
- performance and includes cinematographic adaptations or any
- other form in which the Work may be recast, transformed, or
- adapted including in any form recognizably derived from the
- original, except that a work that constitutes a Collection
- will not be considered an Adaptation for the purpose of this
- License. For the avoidance of doubt, where the Work is a
- musical work, performance or phonogram, the synchronization of
- the Work in timed-relation with a moving image ("synching")
- will be considered an Adaptation for the purpose of this
- License.
-
- b. "Collection" means a collection of literary or artistic works,
- such as encyclopedias and anthologies, or performances,
- phonograms or broadcasts, or other works or subject matter
- other than works listed in Section 1(f) below, which, by
- reason of the selection and arrangement of their contents,
- constitute intellectual creations, in which the Work is
- included in its entirety in unmodified form along with one or
- more other contributions, each constituting separate and
- independent works in themselves, which together are assembled
- into a collective whole. A work that constitutes a Collection
- will not be considered an Adaptation (as defined below) for
- the purposes of this License.
-
- c. "Creative Commons Compatible License" means a license that is
- listed at http://creativecommons.org/compatiblelicenses that
- has been approved by Creative Commons as being essentially
- equivalent to this License, including, at a minimum, because
- that license: (i) contains terms that have the same purpose,
- meaning and effect as the License Elements of this License;
- and, (ii) explicitly permits the relicensing of adaptations of
- works made available under that license under this License or
- a Creative Commons jurisdiction license with the same License
- Elements as this License.
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- d. "Distribute" means to make available to the public the
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-
- h. "Work" means the literary and/or artistic work offered under
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-
- i. "You" means an individual or entity exercising rights under
- this License who has not previously violated the terms of this
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- j. "Publicly Perform" means to perform public recitations of the
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diff --git a/common/GNU-GPL-3 b/common/GNU-GPL-3
deleted file mode 100644
index 94a9ed024d3859793618152ea559a168bbcbb5e2..0000000000000000000000000000000000000000
--- a/common/GNU-GPL-3
+++ /dev/null
@@ -1,674 +0,0 @@
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- 13. Use with the GNU Affero General Public License.
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-reviewing courts shall apply local law that most closely approximates
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-
- END OF TERMS AND CONDITIONS
-
- How to Apply These Terms to Your New Programs
-
- If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
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-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
- <one line to give the program's name and a brief idea of what it does.>
- Copyright (C) <year> <name of author>
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- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
- If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
- <program> Copyright (C) <year> <name of author>
- This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
- You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
- The GNU General Public License does not permit incorporating your program
-into proprietary programs. If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library. If this is what you want to do, use the GNU Lesser General
-Public License instead of this License. But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/common/README b/common/README
deleted file mode 100644
index b6912372207e9ff192f02e0d276495c3e77fe9b8..0000000000000000000000000000000000000000
--- a/common/README
+++ /dev/null
@@ -1,40 +0,0 @@
-Lecture Notes and Examples on Embedded Systems
-Copyright (C) 2012, 2013, 2014, 2015, 2016 Peter Gerwinski <peter@gerwinski.de>
-
-These documents are free software; you can redistribute them and/or
-modify them under the terms and conditions of the following licenses:
-
- *.tex: scripts and slides
- - either the GNU General Public License, version 3
- or, at your option, any later version,
- - or the Creative Commons Attribution-ShareAlike 3.0
- Unported License
-
- *.c, *.h, Makefile*: programming examples
- - either the Modified BSD License,
- - or the Creative Commons Attribution-ShareAlike 3.0
- Unported License
-
- * sfmath.sty is subject to the LaTeX Project Public License,
- version 1.3 or later. See that file for details.
-
- * The script uses some other free media files; see the script
- for their individual licenses.
-
-These documents are distributed in the hope that they will be
-useful, but WITHOUT ANY WARRANTY; without even the implied warranty
-of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-licenses for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; see the file GNU-GPL-3. If not, see
-<http://www.gnu.org/licenses/>.
-
-You should have received a copy of the Modified BSD License
-along with this document; see the file BSD-MODIFIED. If not,
-see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
-
-You should have received a copy of the Creative Commons
-Attribution-ShareAlike 3.0 Unported License along with
-this document; see the file CC-BY-SA-3.0. If not, see
-<http://creativecommons.org/licenses/>.
diff --git a/common/Retribution_Engine_Screenshot_120807.jpg b/common/Retribution_Engine_Screenshot_120807.jpg
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diff --git a/common/pgscript.sty b/common/pgscript.sty
deleted file mode 100644
index bda14e7c665bd90c6e2d361c2b6966e93a014528..0000000000000000000000000000000000000000
--- a/common/pgscript.sty
+++ /dev/null
@@ -1,133 +0,0 @@
-% pgscript.sty - LaTeX Settings for Lecture Notes
-% Copyright (C) 2012, 2015, 2017 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-\usepackage{amsfonts}
-\usepackage[colorlinks,allcolors=blue]{hyperref}
-\usepackage[british,german]{babel} % Yes, really "german" and not "ngerman".
-\usepackage[utf8]{luainputenc} % Without this, umlauts are broken. Weird.
-\usepackage{microtype}
-\usepackage[T1]{fontenc}
-\usepackage{times}
-\usepackage{helvet}
-\renewcommand*\familydefault{\sfdefault}
-\usepackage{graphicx}
-\usepackage{ifluatex}
-\usepackage{xcolor}
-\usepackage{enumerate}
-
-%% Repair kerning: Automatically insert "\kern{-0.15em}" between "//" % (in URLs).
-%% PG20151206: This seems unnecessary here. Maybe due to \sf?
-%\ifluatex
-%\directlua{
-% local glyph = node.id ("glyph")
-% local function my_kerning (head)
-% for t in node.traverse (head) do
-% if t.id == glyph and t.char == 47 then
-% if t.next
-% and t.next.next
-% and t.next.next.id == glyph
-% and t.next.next.char == 47 then
-% local k = node.new ("kern")
-% k.kern = tex.sp ("-0.15em")
-% k.next = t.next
-% k.prev = t
-% t.next.prev = k
-% t.next = k
-% end
-% end
-% end
-% node.kerning (head)
-% end
-% luatexbase.add_to_callback ("kerning", my_kerning, "URL kerning")
-%}
-%\fi
-
-\definecolor{blendedblue}{rgb}{0.2,0.2,0.7}
-\definecolor{darkgreen}{rgb}{0.0,0.3,0.0}
-\definecolor{darkred}{rgb}{0.7,0.0,0.0}
-\definecolor{darkgrey}{rgb}{0.4,0.4,0.4}
-
-\newcommand{\breath}{\bigskip\goodbreak}
-\newcommand{\subsubsubsection}[1]{\breath\par\textbf{#1}\nopagebreak\par}
-\newenvironment{experts}{\color{darkgrey}}{}
-\newenvironment{whiteout}{\definecolor{darkgreen}{rgb}{1.0,1.0,1.0}%
- \definecolor{darkred}{rgb}{1.0,1.0,1.0}%
- \color{white}}{}
-\newenvironment{hint}{%
- \begin{quote}
- \addtolength{\leftskip}{0.6cm}%
-% \includegraphics[width=1cm]{Zeichen_101_-_Gefahrstelle,_StVO_1970.pdf}
- \makebox(0,0)[r]{\includegraphics[width=1cm]{Zeichen_101_-_Gefahrstelle,_StVO_1970.pdf}\hspace*{0.5em}}%
-% \hangindent 1.2cm
-% \hangafter 2
- \bfseries
-% Foobar Foobar Foobar Foobar Foobar Foobar Foobar Foobar
-% Foobar Foobar Foobar Foobar Foobar Foobar Foobar Foobar
-% Foobar Foobar Foobar Foobar Foobar Foobar Foobar Foobar
-% Foobar Foobar Foobar Foobar Foobar Foobar Foobar Foobar
- \ignorespaces
-}{%
- \end{quote}
-}
-\urlstyle{sf}
-\newcommand{\file}[1]{{\color{blendedblue}#1}}
-\newcommand{\textarrow}{{\boldmath $\longrightarrow$}}
-\newcommand{\arrowitem}{\item[\textarrow]}
-\newcommand{\newterm}[1]{\emph{\color{darkgreen}#1}}
-
-\newcounter{exercise}
-\newcommand{\exercise}[1]{\addtocounter{exercise}{1}\subsection*{Aufgabe \arabic{exercise}: #1}}
-\newcommand{\solution}{\subsubsection*{Lösung}}
-
-\newcommand{\gitfile}[3]{\href{https://gitlab.cvh-server.de/pgerwinski/#1/raw/master/#2/#3}{\file{#3}}}
-
-\usepackage{listings}
-\lstset{basicstyle=\color{blendedblue},
- language=C,
- captionpos=b,
- gobble=4,
- xleftmargin=1em,
- columns=fullflexible,
- moredelim=**[is][\color{red}]{¡}{¿}}
-\lstdefinestyle{numbered}{xleftmargin=2em,
- numbers=left,
- numberstyle=\footnotesize\color{gray}}
-\lstdefinestyle{terminal}{basicstyle=\ttfamily\color{darkgreen},
- language={},
- columns=fixed,
- moredelim=**[is][\color{darkred}]{¡}{¿},
- moredelim=**[is][\color{blendedblue}]{°}{¿},
- moredelim=**[is][\sffamily\it\lstset{columns=fullflexible}]{²}{¿}}
-\lstdefinestyle{cmd}{basicstyle=\ttfamily\color{darkred},
- language={},
- columns=fixed,
- moredelim=**[is][\color{darkgreen}]{¡}{¿},
- moredelim=**[is][\color{blendedblue}]{°}{¿},
- moredelim=**[is][\sffamily\it\lstset{columns=fullflexible}]{²}{¿}}
-
-\setlength{\textwidth}{16.5cm}
-\setlength{\textheight}{26.0cm}
-\setlength{\hoffset}{-1.5cm}
-\setlength{\voffset}{-3.0cm}
-\setlength{\parindent}{0pt}
-\setlength{\parskip}{\medskipamount}
-\setlength{\unitlength}{1cm}
diff --git a/common/pgslides.sty b/common/pgslides.sty
deleted file mode 100644
index 9a019ce99f03d27a17942facc56fe2145f46b6a6..0000000000000000000000000000000000000000
--- a/common/pgslides.sty
+++ /dev/null
@@ -1,233 +0,0 @@
-% pgslides.sty - LaTeX Settings for Lecture Slides
-% Copyright (C) 2012, 2013 Peter Gerwinski
-%
-% This document is free software: you can redistribute it and/or
-% modify it either under the terms of the Creative Commons
-% Attribution-ShareAlike 3.0 License, or under the terms of the
-% GNU General Public License as published by the Free Software
-% Foundation, either version 3 of the License, or (at your option)
-% any later version.
-%
-% This document is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with this document. If not, see <http://www.gnu.org/licenses/>.
-%
-% You should have received a copy of the Creative Commons
-% Attribution-ShareAlike 3.0 Unported License along with this
-% document. If not, see <http://creativecommons.org/licenses/>.
-
-\usepackage{amsfonts}
-\usepackage[british,german]{babel} % Yes, really "german" and not "ngerman".
-\usepackage[utf8]{luainputenc} % Without this, umlauts are broken. Weird.
-\usepackage{microtype}
-\usepackage[T1]{fontenc}
-\usepackage{times}
-\usepackage{helvet}
-\renewcommand*\familydefault{\sfdefault}
-\usepackage{graphicx}
-\usepackage{pstricks}
-
-\hypersetup{colorlinks,allcolors=blue}
-
-%% @@@ Not necessary for slides. Why???
-%% Repair kerning: Automatically insert "\kern{-0.15em}" between "//" % (in URLs).
-%\directlua{
-% local glyph = node.id ("glyph")
-% local function my_kerning (head)
-% for t in node.traverse (head) do
-% if t.id == glyph and t.char == 47 then
-% if t.next
-% and t.next.next
-% and t.next.next.id == glyph
-% and t.next.next.char == 47 then
-% local k = node.new ("kern")
-% k.kern = tex.sp ("-0.15em")
-% k.next = t.next
-% k.prev = t
-% t.next.prev = k
-% t.next = k
-% end
-% end
-% end
-% node.kerning (head)
-% end
-% luatexbase.add_to_callback ("kerning", my_kerning, "URL kerning")
-%}
-
-\usetheme{default}
-\usefonttheme{structurebold}
-\setbeamertemplate{navigation symbols}{}
-\setbeamersize{text margin left = 0.3cm, text margin right = 0.2cm}
-\setbeamertemplate{itemize item}{$\bullet$}
-\setbeamertemplate{itemize subitem}{--}
-\setbeamerfont{itemize/enumerate subbody}{size=\normalsize}
-\setbeamerfont{itemize/enumerate subsubbody}{size=\normalsize}
-\setbeamercolor{footline}{fg=gray}
-
-\newcommand{\sep}{~$\cdot$~}
-
-\newif\ifminimalistic
-\minimalistictrue
-
-\institute[Hochschule Bochum\sep CVH]{%
- \makebox(0,0.005)[tl]{\includegraphics[scale=0.72]{logo-hochschule-bochum-cvh-text-v2.pdf}}\hfill
- \makebox(0,0)[tr]{\includegraphics[scale=0.5]{logo-hochschule-bochum.pdf}}%
-}
-
-\setbeamertemplate{headline}{%
- \leavevmode
- \hbox to \textwidth{%
- \ifminimalistic
- \strut\hfill
- \else
- \rule{0pt}{5.7pt}%
- \hspace*{8.55pt}\insertinstitute\hspace*{5.7pt}%
- \raisebox{-30pt}{\rule{0pt}{1pt}}%
- \fi
- }%
- \vskip0pt%
-}
-
-\iffalse
- \setbeamertemplate{footline}{}
-\else
- \setbeamertemplate{footline}{%
- \leavevmode
- \hbox to \textwidth{%
- \usebeamercolor{footline}%
- \usebeamerfont{footline}%
- \ifminimalistic
- \strut\hfill
- \else
- \,\insertshorttitle\sep
- \insertshortauthor\sep
- \insertshortinstitute\sep
- \insertshortdate\hfill
- \fi
- \insertframenumber/\inserttotalframenumber
- %Folie\,\insertframenumber\sep Seite\,\insertpagenumber\,
- }%
- \vskip0pt%
- }
-\fi
-
-\newcommand{\maketitleframe}{%
- \ifminimalistic
- \begin{frame}[t,plain]
- \insertinstitute
- \par\vfill
- \begin{center}
- {\LARGE\color{structure}\inserttitle\par}\bigskip\bigskip
- {\large \insertauthor\par}\bigskip\medskip
- \insertdate
- \end{center}
- \end{frame}
- \else
- \begin{frame}
- \vfill
- \begin{center}
- {\LARGE\color{structure}\inserttitle\par}\bigskip\bigskip
- {\large \insertauthor\par}\bigskip\medskip
- \insertdate
- \end{center}
- \vfill
- \end{frame}
- \fi
-}
-
-\definecolor{medgreen}{rgb}{0.0,0.5,0.0}
-\definecolor{darkgreen}{rgb}{0.0,0.3,0.0}
-\definecolor{lightred}{rgb}{1.0,0.7,0.7}
-\definecolor{medred}{rgb}{0.5,0.0,0.0}
-\definecolor{bored}{rgb}{0.89,0.0,0.098}
-\definecolor{lightgray}{rgb}{0.85,0.85,0.85}
-\definecolor{orange}{rgb}{1.0,0.5,0.0}
-\definecolor{darkgray}{rgb}{0.4,0.4,0.4}
-
-\newenvironment{experts}{\color{darkgray}}{}
-
-\usepackage{listings}
-\lstset{basicstyle=\color{structure},
- language=C,
- captionpos=b,
- gobble=4,
- columns=fullflexible,
- aboveskip=0pt,
- belowskip=0pt,
- moredelim=**[is][\color{structure}]{¡}{¿},
- moredelim=**[is][\only<2->{\color{structure}}]{²}{¿},
- moredelim=**[is][\only<3->{\color{structure}}]{³}{¿},
- moredelim=**[is][\only<4->{\color{structure}}]{°}{¿},
- moredelim=**[is][\only<5->{\color{structure}}]{¤}{¿},
- moredelim=**[is][\only<6->{\color{structure}}]{¢}{¿},
- moredelim=**[is][\only<7->{\color{structure}}]{æ}{¿},
- moredelim=**[is][\only<8->{\color{structure}}]{ø}{¿}}
-\lstdefinestyle{terminal}{basicstyle=\ttfamily\color{darkgreen},
- language={},
- columns=fixed,
- moredelim=**[is][\color{red}]{¡}{¿},
- moredelim=**[is][\color{blendedblue}]{°}{¿},
- moredelim=**[is][\sffamily\it\lstset{columns=fullflexible}]{²}{¿}}
-\lstdefinestyle{cmd}{basicstyle=\ttfamily\color{red},
- language={},
- gobble=2,
- columns=fixed,
- moredelim=**[is][\color{darkgreen}]{¡}{¿},
- moredelim=**[is][\color{structure}]{°}{¿},
- moredelim=**[is][\sffamily\it\lstset{columns=fullflexible}]{²}{¿}}
-\lstdefinestyle{shy}{basicstyle=\color{lightgray}}
-
-\setcounter{topnumber}{3}
-\renewcommand\topfraction{0.7}
-\setcounter{bottomnumber}{3}
-\renewcommand\bottomfraction{0.7}
-\setcounter{totalnumber}{5}
-\renewcommand\textfraction{0.1}
-\renewcommand\floatpagefraction{0.9}
-
-\setlength{\unitlength}{1cm}
-
-\newcommand{\protectfile}[1]{#1}
-\urlstyle{sf}
-\newcommand{\file}[1]{{\color{structure}\protectfile{#1}}}
-\newcommand{\textarrow}{{\boldmath $\longrightarrow$}}
-\newcommand{\arrowitem}{\item[\textarrow]}
-\newcommand{\newterm}[1]{\emph{\color{darkgreen}#1}}
-\newcommand{\BIGskip}{\vspace{1cm}}
-\newcommand{\shy}{\color{lightgray}}
-\newcommand{\hot}{\color{red}}
-\newcommand{\shyhot}{\color{lightred}}
-
-\newcommand{\sectionnonumber}[1]{\section{#1}\addtocounter{section}{-1}}
-
-\def\showsectionnonumber{\hbox{\Large\color{structure}\bf
- \vtop{\secname}\par}\bigskip}
-
-\newcommand{\nosectionnonumber}[1]{\gdef\nosectionnonumbername{#1}}
-
-\def\shownosectionnonumber{\hbox{\Large\color{structure}\bf
- \vtop{\nosectionnonumbername}\par}\bigskip}
-
-\def\showsection{\hbox{\Large\color{structure}\bf
- \vtop{\hbox{\arabic{section}}}\kern1em%
- \vtop{\secname}\par}\bigskip}
-
-\newcommand{\subsectionnonumber}[1]{\subsection{#1}\addtocounter{subsection}{-1}}
-
-\def\showsubsectionnonumber{{\large\color{structure}\bf\subsecname\par}\bigskip}
-
-\def\showsubsection{\hbox{\large\color{structure}\bf
- \vtop{\hbox{\arabic{section}.\arabic{subsection}}}\kern1em%
- \vtop{\subsecname}\par}\bigskip}
-
-\newcommand{\subsubsectionnonumber}[1]{\subsubsection{#1}\addtocounter{subsubsection}{-1}}
-
-\def\showsubsubsectionnonumber{{\normalsize\color{structure}\bf\subsubsecname\par}\bigskip}
-
-\def\showsubsubsection{\hbox{\normalsize\color{structure}\bf
- \vtop{\hbox{\arabic{section}.\arabic{subsection}.\arabic{subsubsection}}}\kern1em%
- \vtop{\subsubsecname}\par}\bigskip}
diff --git a/common/philosophenproblem.jpg b/common/philosophenproblem.jpg
deleted file mode 100644
index e912745d043064ee5d4efc2c5cf58d6fdfdf138d..0000000000000000000000000000000000000000
Binary files a/common/philosophenproblem.jpg and /dev/null differ
diff --git a/common/quadrocopter.jpg b/common/quadrocopter.jpg
deleted file mode 100644
index b430e8d3ba70e518ef365bc101f7d4b8418b4d2b..0000000000000000000000000000000000000000
Binary files a/common/quadrocopter.jpg and /dev/null differ
diff --git a/common/rp6.jpg b/common/rp6.jpg
deleted file mode 100644
index 1695afb690b4fb78878236a1efd0d5c6328370f4..0000000000000000000000000000000000000000
Binary files a/common/rp6.jpg and /dev/null differ
diff --git a/common/sfmath.sty b/common/sfmath.sty
deleted file mode 100644
index 566070f49e04a4c4357691d33272da82c37337b4..0000000000000000000000000000000000000000
--- a/common/sfmath.sty
+++ /dev/null
@@ -1,469 +0,0 @@
-% sfmath.sty, copyright 2001-2007 by Olaf Dietrich (olaf@dtrx.de)
-%
-% This work may be distributed and/or modified under the
-% conditions of the LaTeX Project Public License, either version 1.3
-% of this license or (at your option) any later version.
-% The latest version of this license is in
-% http://www.latex-project.org/lppl.txt
-% and version 1.3 or later is part of all distributions of LaTeX
-% version 2005/12/01 or later.
-%
-% This work has the LPPL maintenance status `maintained'.
-%
-% The Current Maintainer of this work is Olaf Dietrich.
-%
-% This work consists of the file sfmath.sty.
-
-
-\NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{sfmath}[2007/08/27 v0.8 sans serif maths]
-
-
-% This is a simple package for sans serif maths in documents.
-%
-% Usage: \usepackage{sfmath} or \usepackage[OPTIONS]{sfmath}
-%
-% After including the package sfmath.sty, all maths of the current
-% document is displayed with sans serif fonts; there is no way to
-% switch back to the original behavior.
-%
-% The default sans serif font for maths is the sans serif font
-% selected for sans serif text (i.e., \sfdefault) when sfmath.sty
-% is loaded. Therefore, you must include sfmath.sty after having
-% changed \sfdefault, e.g., by a package such as helvet.sty or
-% manually. Alternatively, use one of the font options described
-% below (cm, helvet, cmbright, tx, px, or lm) in order to override
-% the default sans serif font.
-%
-% Package OPTIONS (options marked with (+) are experimental):
-%
-% * slantedGreek: for slanted uppercase Greek letters
-%
-% * cm: use Computer Modern (cmss) for maths (explicitly)
-% * helvet: use Postscript Helvetica (phv) for maths (explicitly)
-% * cmbright: use CM-Bright fonts (cmbr) for maths (explicitely)
-% * tx: use Postscript txfonts (tx) for maths (explicitly)
-% * px: use Postscript pxfonts (tx) for maths (explicitly)
-% * lm: use Latin Modern (lmss) for maths (explicitly) (+)
-%
-% * T1experimental: use T1 font encoding for standard maths (+)
-% * AlphT1experimental: use T1 font encoding for \math*{...} commands (+)
-%
-% * mathrmOrig: do not change the behavior of the \mathrm command
-% * mathbfOrig: do not change the behavior of the \mathbf command
-% * mathitOrig: do not change the behavior of the \mathit command
-% * mathsfOrig: do not change the behavior of the \mathsf command
-%
-% (+): Known limitations of experimental options:
-% T1experimental produces a warning about the encoding of the
-% operators font.
-% AlphT1experimental DOES NOT WORK with uppercase Greek letters
-% within the \math*{...} command!
-% These options should only be used with the ec fonts.
-%
-% lm includes T1experimental and AlphT1experimental with the
-% limitations mentioned above.
-%
-% RECOMMENDATION:
-% use the fix-cm package instead of the experimental
-% T1 options: with fix-cm.sty, the chosen ec fonts
-% harmonize much better with the cm sans serif math fonts.
-% Add \RequirePackage{fix-cm} _before_ \documentclass{...}.
-%
-%
-% Some new macros are defined by sfmath.sty:
-%
-% * \mathsl{...}: A new math alphabet that is by default identical
-% with \mathit{...}; useful in combination with the option mathitOrig.
-%
-% * \upOmega, \upDelta: upright versions of \Omega and \Delta;
-% useful when the option slantedGreek is selected.
-%
-%
-% More documentation can currently be found at:
-% <URL:http://dtrx.de/od/tex/sfmath.html>
-
-
-% CHANGES:
-%
-% v0.8:
-%
-% * Update documentation and add license details for CTAN upload.
-%
-%
-% v0.7:
-%
-% * Add (experimental) support for latin modern (lmodern) fonts.
-%
-%
-% v0.6:
-%
-% * Add some artificial intelligence to use slanted bold letters
-% if available (e.g., for phv, txfonts, or pxfonts).
-% Add options to select txfonts, pxfonts, and cmbright (probably
-% not very useful) explicitely.
-% (Thanks to Alberto Lusiani who asked for slanted bold letters.)
-%
-%
-% v0.5:
-%
-% * Add experimental options for T1 font encoding of maths fonts.
-% Using these options can be useful with ec fonts which look
-% slightly different from the standard cm maths fonts (especially
-% at large font size). About limitations see above.
-%
-%
-% v0.4:
-%
-% * Add \upDelta, \upOmega command (to be a little more compatible
-% with other packages that provide the slantedGreek option)
-%
-%
-% v0.3:
-%
-% * Add sans serif shapes for "," and ".", "\ldotp"
-%
-% * Modified documentation
-%
-%
-% v0.2:
-%
-% * New option slantedGreek for slanted greek capitals
-%
-% * Options helvet and cm to select explicitly the sans serif font
-% for maths. Without any of these options, the current \sfdefault
-% is chosen.
-%
-% * Options mathxxOrig: don't change the alphabet command \mathxx;
-% available for \mathrm, \mathbf, \mathit, and \mathsf
-%
-% * Provide dotlessi and dotlessj (if available)
-%
-
-
-% BUGS/LIMITATIONS/PROBLEMS:
-%
-% * Functionality is limited by the intention to work without
-% additionally defined (virtual) fonts; instead, only standard
-% fonts are used.
-%
-% * The font metrics are not adjusted to maths usage (this may
-% result in typographically unsatisfying results).
-%
-% * In many constellations with Postscript fonts (helvet.sty,
-% pslatex.sty, ...) the upper-case greek letters are not chosen
-% correctly within \mathrm, \mathbf, \mathit, ... (because
-% they should be part of OT1-encoded fonts but are not included
-% in these standard postscript fonts).
-%
-% * Bold math symbols are not always available (e.g. with pslatex.sty)
-% or at least not slanted (e.g. with cmss fonts), so better don't
-% use bold maths with this package. (This has been partially improved
-% in version 0.6.)
-%
-% * There is a visual difference between the ec sans serif text fonts
-% and the cm sans serif maths fonts, especially at larger font sizes.
-% The fix-cm package might help to reduce the ugliness of the ec
-% sans serif fonts and the differences between the ec text fonts
-% and the cm math fonts.
-% Alternatively, the experimental options T1experimental and
-% AlphT1Experimental might help by using the ec fonts for maths as well.
-%
-% * The txfonts and pxfonts are reported to have several deficiencies
-% with respect to font metrics and macro implementation; using
-% these fonts is not recommended by the package author.
-%
-% * The set symbols \mathbb{N} or \mathbbm{N} (from bbm.sty) are not
-% changed. You might like to use \mathbbmss{N} (from bbm.sty).
-%
-% * Some symbols have serifish shapes (\sum, \prod, probably more) and
-% are not changed.
-%
-% * Lower-case greek letters are not available in sans serif shape
-% (they don't have real serifs, but cannot be expected to harmonize
-% with the sans serif latin letters).
-%
-%
-% TODO:
-%
-% * Improve documentation.
-%
-% * Provide LaTeX .ins/.dtx files instead of naked .sty file.
-%
-
-
-% HERE WE GO:
-
-% Declare options and defaults and process options
-
-\DeclareOption{slantedGreek}{%
- \renewcommand{\greek@shape}{sl}%
- \renewcommand{\greek@bold@shape}{\greek@bold@sl}%
-}
-
-\DeclareOption{cm}{\renewcommand{\math@sfdefault}{cmss}}
-\DeclareOption{lm}{\renewcommand{\math@sfdefault}{lmss}}
-\DeclareOption{helvet}{\renewcommand{\math@sfdefault}{phv}}
-\DeclareOption{cmbright}{\renewcommand{\math@sfdefault}{cmbr}}
-\DeclareOption{tx}{\renewcommand{\math@sfdefault}{txss}}
-\DeclareOption{px}{\renewcommand{\math@sfdefault}{pxss}}
-
-\DeclareOption{T1experimental}{\renewcommand{\math@encoding}{T1}}
-\DeclareOption{AlphT1experimental}{\renewcommand{\math@lph@encoding}{T1}}
-
-\DeclareOption{mathrmOrig}{\renewcommand{\mathrm@lph}{cmr}}
-\DeclareOption{mathbfOrig}{\renewcommand{\mathbf@lph}{cmr}}
-\DeclareOption{mathitOrig}{\renewcommand{\mathit@lph}{cmr}}
-\DeclareOption{mathsfOrig}{\renewcommand{\mathsf@lph}{cmss}}
-
-
-\newcommand{\math@sfdefault}{\sfdefault}
-\newcommand{\math@encoding}{OT1}
-\newcommand{\math@lph@encoding}{OT1}
-
-\newcommand{\mathrm@lph}{\math@sfdefault}
-\newcommand{\mathbf@lph}{\math@sfdefault}
-\newcommand{\mathit@lph}{\math@sfdefault}
-\newcommand{\mathsf@lph}{\math@sfdefault}
-
-
-% \math@sfGreek: Font for capital greeks: cmss or other?
-% \greek@shape: Capital greeks: normal or slanted? [slantedGreek]
-% \greek@bold@shape: Bold capital greeks: normal or slanted? [slantedGreek]
-% \greek@bold@sl: Bold capital greeks: "sl" if slanted possible
-%
-% \mathnormal@bold@shape: Bold letters: normal or slanted? (always bold)
-% \mathit@bold@series: Bold \mathit (\mathsl): medium or bold? (always slanted)
-
-\newcommand{\math@sfGreek}{cmss}
-\newcommand{\greek@shape}{n}
-\newcommand{\greek@bold@shape}{n}
-\newcommand{\greek@bold@sl}{n}
-\newcommand{\mathnormal@bold@shape}{n}
-\newcommand{\mathit@bold@series}{m}
-
-
-
-\ProcessOptions
-
-
-
-% check the current value of \math@sfdefault
-
-\edef\tmp@sfdefault{\math@sfdefault}
-
-\def\tmp@compare{cmss}
-\ifx\tmp@sfdefault\tmp@compare
- % \sfdefault is cmss
- % no slanted bold letters
- % no slanted bold capital Greeks
- \renewcommand{\math@sfGreek}{cmss}
- \renewcommand{\greek@bold@sl}{n}
- \renewcommand{\mathnormal@bold@shape}{n}
- \renewcommand{\mathit@bold@series}{m}
-\fi
-
-\def\tmp@compare{phv}
-\ifx\tmp@sfdefault\tmp@compare
- % \sfdefault is phv (helvet.sty)
- % slanted bold letters
- % no capital Greeks
- \renewcommand{\math@sfGreek}{cmss}
- \renewcommand{\greek@bold@sl}{n}
- \renewcommand{\mathnormal@bold@shape}{sl}
- \renewcommand{\mathit@bold@series}{bx}
-\fi
-
-\def\tmp@compare{txss}
-\ifx\tmp@sfdefault\tmp@compare
- % \sfdefault is txss (txfonts.sty)
- % slanted bold letters
- % slanted bold capital Greeks
- \renewcommand{\math@sfGreek}{txss}
- \renewcommand{\greek@bold@sl}{sl}
- \renewcommand{\mathnormal@bold@shape}{sl}
- \renewcommand{\mathit@bold@series}{bx}
-\fi
-
-\def\tmp@compare{pxss}
-\ifx\tmp@sfdefault\tmp@compare
- % \sfdefault is pxss (pxfonts.sty)
- % slanted bold letters
- % slanted bold capital Greeks
- \renewcommand{\math@sfGreek}{pxss}
- \renewcommand{\greek@bold@sl}{sl}
- \renewcommand{\mathnormal@bold@shape}{sl}
- \renewcommand{\mathit@bold@series}{bx}
-\fi
-
-\def\tmp@compare{cmbr}
-\ifx\tmp@sfdefault\tmp@compare
- % \sfdefault is cmbr (cmbright.sty)
- % no slanted bold letters
- % no slanted bold capital Greeks
- \renewcommand{\math@sfGreek}{cmbr}
- \renewcommand{\greek@bold@sl}{n}
- \renewcommand{\mathnormal@bold@shape}{n}
- \renewcommand{\mathit@bold@series}{m}
-\fi
-
-\def\tmp@compare{lmss}
-\ifx\tmp@sfdefault\tmp@compare
- % \sfdefault is lmss (lmodern.sty sans serif)
- % T1 encoding only
- % slanted bold letters
- % no slanted bold capital Greeks
- \renewcommand{\math@encoding}{T1}
- \renewcommand{\math@lph@encoding}{T1}
- \renewcommand{\math@sfGreek}{cmss}
- \renewcommand{\greek@bold@sl}{n}
- \renewcommand{\mathnormal@bold@shape}{sl}
- \renewcommand{\mathit@bold@series}{bx}
-\fi
-
-
-
-% Change font for digits and "operators" (\sin, \exp, ...)
-% to default sans serif font
-
-\SetSymbolFont{operators}{normal}{\math@encoding}{\math@sfdefault}{m}{n}
-\SetSymbolFont{operators}{bold}{\math@encoding}{\math@sfdefault}{bx}{n}
-
-
-% Most special math symbols remain unmodified (and many of those
-% don't have serifs); however all letters (A-Z, a-z) are
-% explicitely changed to the sans serif version (again
-% default sans serif font).
-%
-% Unfortunately, there is no standard slanted+bold sans serif font
-% available (as Postscript Type 1 font), so try an upright
-% version (may be better than nothing).
-
-\DeclareSymbolFont{SFMath}{\math@encoding}{\math@sfdefault}{m}{sl}
-\SetSymbolFont{SFMath}{normal}{\math@encoding}{\math@sfdefault}{m}{sl}
-\SetSymbolFont{SFMath}{bold}{\math@encoding}{\math@sfdefault}{bx}{\mathnormal@bold@shape}
-\DeclareMathSymbol{A}{\mathalpha}{SFMath}{`A}
-\DeclareMathSymbol{B}{\mathalpha}{SFMath}{`B}
-\DeclareMathSymbol{C}{\mathalpha}{SFMath}{`C}
-\DeclareMathSymbol{D}{\mathalpha}{SFMath}{`D}
-\DeclareMathSymbol{E}{\mathalpha}{SFMath}{`E}
-\DeclareMathSymbol{F}{\mathalpha}{SFMath}{`F}
-\DeclareMathSymbol{G}{\mathalpha}{SFMath}{`G}
-\DeclareMathSymbol{H}{\mathalpha}{SFMath}{`H}
-\DeclareMathSymbol{I}{\mathalpha}{SFMath}{`I}
-\DeclareMathSymbol{J}{\mathalpha}{SFMath}{`J}
-\DeclareMathSymbol{K}{\mathalpha}{SFMath}{`K}
-\DeclareMathSymbol{L}{\mathalpha}{SFMath}{`L}
-\DeclareMathSymbol{M}{\mathalpha}{SFMath}{`M}
-\DeclareMathSymbol{N}{\mathalpha}{SFMath}{`N}
-\DeclareMathSymbol{O}{\mathalpha}{SFMath}{`O}
-\DeclareMathSymbol{P}{\mathalpha}{SFMath}{`P}
-\DeclareMathSymbol{Q}{\mathalpha}{SFMath}{`Q}
-\DeclareMathSymbol{R}{\mathalpha}{SFMath}{`R}
-\DeclareMathSymbol{S}{\mathalpha}{SFMath}{`S}
-\DeclareMathSymbol{T}{\mathalpha}{SFMath}{`T}
-\DeclareMathSymbol{U}{\mathalpha}{SFMath}{`U}
-\DeclareMathSymbol{V}{\mathalpha}{SFMath}{`V}
-\DeclareMathSymbol{W}{\mathalpha}{SFMath}{`W}
-\DeclareMathSymbol{X}{\mathalpha}{SFMath}{`X}
-\DeclareMathSymbol{Y}{\mathalpha}{SFMath}{`Y}
-\DeclareMathSymbol{Z}{\mathalpha}{SFMath}{`Z}
-\DeclareMathSymbol{a}{\mathalpha}{SFMath}{`a}
-\DeclareMathSymbol{b}{\mathalpha}{SFMath}{`b}
-\DeclareMathSymbol{c}{\mathalpha}{SFMath}{`c}
-\DeclareMathSymbol{d}{\mathalpha}{SFMath}{`d}
-\DeclareMathSymbol{e}{\mathalpha}{SFMath}{`e}
-\DeclareMathSymbol{f}{\mathalpha}{SFMath}{`f}
-\DeclareMathSymbol{g}{\mathalpha}{SFMath}{`g}
-\DeclareMathSymbol{h}{\mathalpha}{SFMath}{`h}
-\DeclareMathSymbol{i}{\mathalpha}{SFMath}{`i}
-\DeclareMathSymbol{j}{\mathalpha}{SFMath}{`j}
-\DeclareMathSymbol{k}{\mathalpha}{SFMath}{`k}
-\DeclareMathSymbol{l}{\mathalpha}{SFMath}{`l}
-\DeclareMathSymbol{m}{\mathalpha}{SFMath}{`m}
-\DeclareMathSymbol{n}{\mathalpha}{SFMath}{`n}
-\DeclareMathSymbol{o}{\mathalpha}{SFMath}{`o}
-\DeclareMathSymbol{p}{\mathalpha}{SFMath}{`p}
-\DeclareMathSymbol{q}{\mathalpha}{SFMath}{`q}
-\DeclareMathSymbol{r}{\mathalpha}{SFMath}{`r}
-\DeclareMathSymbol{s}{\mathalpha}{SFMath}{`s}
-\DeclareMathSymbol{t}{\mathalpha}{SFMath}{`t}
-\DeclareMathSymbol{u}{\mathalpha}{SFMath}{`u}
-\DeclareMathSymbol{v}{\mathalpha}{SFMath}{`v}
-\DeclareMathSymbol{w}{\mathalpha}{SFMath}{`w}
-\DeclareMathSymbol{x}{\mathalpha}{SFMath}{`x}
-\DeclareMathSymbol{y}{\mathalpha}{SFMath}{`y}
-\DeclareMathSymbol{z}{\mathalpha}{SFMath}{`z}
-
-\DeclareMathSymbol{\imath}{\mathalpha}{SFMath}{"10}
-\DeclareMathSymbol{\jmath}{\mathalpha}{SFMath}{"11}
-
-
-% The symbols ",", ".", and "\ldotp" should be sans serif
-% but upright.
-
-\DeclareSymbolFont{SFMathUp}{\math@encoding}{\math@sfdefault}{m}{n}
-\SetSymbolFont{SFMathUp}{normal}{\math@encoding}{\math@sfdefault}{m}{n}
-\SetSymbolFont{SFMathUp}{bold}{\math@encoding}{\math@sfdefault}{bx}{n}
-\DeclareMathSymbol{,}{\mathpunct}{SFMathUp}{`,}
-\DeclareMathSymbol{.}{\mathord}{SFMathUp}{`.}
-\DeclareMathSymbol{\ldotp}{\mathord}{SFMathUp}{`.}
-
-
-% Take capital greek letters from cmss or [tp]xss; other sans serif fonts
-% like helvetica don't have capital greeks, so here cmss is
-% taken instead of \sfdefault. Unfortunately, this does not work
-% within the alphabet commands \mathrm, \mathsf, ...
-
-\DeclareSymbolFont{SFMathGreek}{OT1}{\math@sfGreek}{m}{\greek@shape}
-\SetSymbolFont{SFMathGreek}{normal}{OT1}{\math@sfGreek}{m}{\greek@shape}
-\SetSymbolFont{SFMathGreek}{bold}{OT1}{\math@sfGreek}{bx}{\greek@bold@shape}
-
-\DeclareMathSymbol{\Gamma}{\mathalpha}{SFMathGreek}{"00}
-\DeclareMathSymbol{\Delta}{\mathalpha}{SFMathGreek}{"01}
-\DeclareMathSymbol{\Theta}{\mathalpha}{SFMathGreek}{"02}
-\DeclareMathSymbol{\Lambda}{\mathalpha}{SFMathGreek}{"03}
-\DeclareMathSymbol{\Xi}{\mathalpha}{SFMathGreek}{"04}
-\DeclareMathSymbol{\Pi}{\mathalpha}{SFMathGreek}{"05}
-\DeclareMathSymbol{\Sigma}{\mathalpha}{SFMathGreek}{"06}
-\DeclareMathSymbol{\Upsilon}{\mathalpha}{SFMathGreek}{"07}
-\DeclareMathSymbol{\Phi}{\mathalpha}{SFMathGreek}{"08}
-\DeclareMathSymbol{\Psi}{\mathalpha}{SFMathGreek}{"09}
-\DeclareMathSymbol{\Omega}{\mathalpha}{SFMathGreek}{"0A}
-
-
-\DeclareSymbolFont{SFMathUpGreek}{OT1}{\math@sfGreek}{m}{n}
-\SetSymbolFont{SFMathUpGreek}{normal}{OT1}{\math@sfGreek}{m}{n}
-\SetSymbolFont{SFMathUpGreek}{bold}{OT1}{\math@sfGreek}{bx}{n}
-
-\DeclareMathSymbol{\upDelta}{\mathalpha}{SFMathUpGreek}{"01}
-\DeclareMathSymbol{\upOmega}{\mathalpha}{SFMathUpGreek}{"0A}
-
-
-% Define new behavior for math alphabet commands
-
-
-\SetMathAlphabet{\mathnormal}{normal}{\math@lph@encoding}{\math@sfdefault}{m}{sl}
-\SetMathAlphabet{\mathnormal}{bold}{\math@lph@encoding}{\math@sfdefault}{bx}{\mathnormal@bold@shape}
-
-\SetMathAlphabet{\mathrm}{normal}{\math@lph@encoding}{\mathrm@lph}{m}{n}
-\SetMathAlphabet{\mathrm}{bold}{\math@lph@encoding}{\mathrm@lph}{bx}{n}
-
-\SetMathAlphabet{\mathbf}{normal}{\math@lph@encoding}{\mathbf@lph}{bx}{n}
-\SetMathAlphabet{\mathbf}{bold}{\math@lph@encoding}{\mathbf@lph}{bx}{n}
-
-\SetMathAlphabet{\mathit}{normal}{\math@lph@encoding}{\mathit@lph}{m}{sl}
-\SetMathAlphabet{\mathit}{bold}{\math@lph@encoding}{\mathit@lph}{\mathit@bold@series}{sl}
-
-\SetMathAlphabet{\mathsf}{normal}{\math@lph@encoding}{\mathsf@lph}{m}{n}
-\SetMathAlphabet{\mathsf}{bold}{\math@lph@encoding}{\mathsf@lph}{bx}{n}
-
-
-
-% Define new math alphabet command \mathsl
-
-\DeclareMathAlphabet{\mathsl}{\math@lph@encoding}{\math@sfdefault}{m}{sl}
-\SetMathAlphabet{\mathsl}{bold}{\math@lph@encoding}{\math@sfdefault}{\mathit@bold@series}{sl}
-
-
-\endinput
diff --git a/common/xbee.jpg b/common/xbee.jpg
deleted file mode 100644
index 9bf9d4b767646bf05fb6b0b61a82b2fa7342eec0..0000000000000000000000000000000000000000
Binary files a/common/xbee.jpg and /dev/null differ
diff --git a/es-slides-2018ws.pdf b/es-slides-2018ws.pdf
deleted file mode 100644
index 4ebec3aaed5df37c81a5eff63df75da30f2fc5f5..0000000000000000000000000000000000000000
Binary files a/es-slides-2018ws.pdf and /dev/null differ
diff --git a/update b/update
deleted file mode 100755
index 29efa64d5b6706ed18844a382fa26426f9659d34..0000000000000000000000000000000000000000
--- a/update
+++ /dev/null
@@ -1,125 +0,0 @@
-#!/bin/bash
-
-sem=2018ws
-course=es
-
-date_mask="201[89][01][0-9][0-3][0-9]"
-time_mask="[0-2][0-9][0-5][0-9][0-5][0-9]"
-base_url="https://gitlab.cvh-server.de/pgerwinski/$course/raw/master/"
-pattern="README:"
-
-if pdfjam --papersize "{362.835pt,272.126pt}" -o es-slides-$sem.pdf \
- $date_mask/es-$date_mask.pdf > /dev/null 2> pdfjam.err; then
- rm pdfjam.err
-else
- cat pdfjam.err
- rm pdfjam.err
- exit 1
-fi
-
-readme_old=README.md
-readme=README-NEW.md
-
-collect ()
-{
- if [ "$1" = "--no-date" ]; then
- show_date=false
- shift
- else
- show_date=true
- fi
- headline="$1"; shift
- source_suffix="$1"; shift
- target_suffix="$1"; shift
- underline=$(echo "$headline" | sed -e 's/./-/g')
- echo >> $readme
- echo "$headline" >> $readme
- echo "$underline" >> $readme
- for f in "$@"; do
- description=$(grep -m 1 "$pattern" "$f" | sed -e "s/^.*$pattern *//")
- if $show_date; then
- y=$(echo $f | cut -b 1-4)
- m=$(echo $f | cut -b 5-6)
- d=$(echo $f | cut -b 7-8)
- date="$d.$m.$y: "
- else
- date=""
- fi
- url="$base_url"$(echo $f | sed -e "s/\.$source_suffix$/.$target_suffix/")
- echo " * [$date$description]($url)" >> $readme
- done
-}
-
-cat > $readme << EOF
-Eingebettete Systeme
-====================
-
-Lehrveranstaltung im Wintersemester 2018/19
-Hochschule Bochum, Campus Velbert/Heiligenhaus
-Prof. Dr. rer. nat. Peter Gerwinski
-
-Copyright © 2012–2018 Peter Gerwinski
-
-**Diese Lehrmaterialien sind freie Software.**
-Sie dürfen diese gemäß den jeweils angegebenen Lizenzen
-([CC-BY-SA 3.0](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/CC-BY-SA-3.0),
-[GNU GPL 3+](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/GNU-GPL-3),
-[modified BSD License](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/BSD-MODIFIED))
-studieren, kopieren, modifizieren und/oder weitergeben.
-Für Details siehe [common/README](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/README).
-EOF
-
-#collect "Vortragsfolien:" tex pdf $date_mask/es-$date_mask.tex $date_mask/verschluesselung-$date_mask.tex
-collect "Vortragsfolien:" tex pdf $date_mask/es-$date_mask.tex
-
-cat >> $readme << EOF
- * [alle in 1 Datei](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/es-slides-2018ws.pdf)
-EOF
-
-#collect "Übungsaufgaben:" tex pdf $date_mask/es-uebung-$date_mask.tex
-collect "Tafelbilder:" txt jpg $date_mask/photo-$date_mask-$time_mask.txt
-#collect --no-date "Praktikumsunterlagen:" tex pdf $date_mask/es-$sem-p[1-4].tex
-
-cat >> $readme << EOF
-
-Literatur:
-----------
- * [Skript: Netzwerktechnik](http://www.peter.gerwinski.de/download/net-2013ss.tar.gz]
-
-Original-Materialien einschließlich Beispiel-Programme und LaTeX-Quelltexte:
-----------------------------------------------------------------------------
- * [common – gemeinsame Dateien für Skript und Vortragsfolien](https://gitlab.cvh-server.de/pgerwinski/es/tree/master/common)
- * [201????? – Vortragsfolien und Beispiele](https://gitlab.cvh-server.de/pgerwinski/es/tree/master)
- * [branch 2017ws – vollständige Lehrmaterialien vom Wintersemester 2017/18](https://gitlab.cvh-server.de/pgerwinski/es/tree/2017ws)
-
-
-Embedded Systems
-================
-
-Course in winter semester 2018–19
-Bochum University of Applied Sciences, Campus Velbert/Heiligenhaus
-Prof. Dr. rer. nat. Peter Gerwinski
-
-Copyright © 2012–2018 Peter Gerwinski
-
-**These teaching materials are Free Software.**
-You may study, copy, modify, and/or distribute them
-according to their respective licences
-([CC-BY-SA 3.0](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/CC-BY-SA-3.0),
-[GNU GPL 3+](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/GNU-GPL-3),
-[modified BSD License](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/BSD-MODIFIED)).
-See the file [common/README](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/common/README) for details.
-
- * [common – common files for lecture notes and slides](https://gitlab.cvh-server.de/pgerwinski/es/tree/master/common)
- * [201????? – slides and examples](https://gitlab.cvh-server.de/pgerwinski/es/tree/master)
- * [es-slides-2018ws.pdf – all slides in 1 file](https://gitlab.cvh-server.de/pgerwinski/es/raw/master/es-slides-2018ws.pdf)
- * [branch 2017ws – complete teaching materials from winter semester 2017–18](https://gitlab.cvh-server.de/pgerwinski/es/tree/2017ws)
-EOF
-
-if diff -wu $readme_old $readme; then
- rm $readme
-else
- echo -n "Press ENTER to overwrite $readme_old, ^C to abort (keeping $readme) "
- read junk
- mv $readme $readme_old
-fi