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esbuild.dev.mjs

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  • buffer-overflow-01.txt 1.04 KiB
    #include <stdio.h>
    
    int main (void)
    {
      char buffer[20];
      gets (buffer);
      printf ("Guten Tag, %s!\n", buffer);
      return 0;
    }
    cassini/home/peter/bo/2022ss/bs/20220516> gcc -Wall -O buffer-overflow-01.c -o buffer-overflow-01
    buffer-overflow-01.c: In function ‘main’:
    buffer-overflow-01.c:6:3: warning: implicit declaration of function ‘gets’; did you mean ‘fgets’? [-Wimplicit-function-declaration]
       gets (buffer);
       ^~~~
       fgets
    /usr/bin/ld: /tmp/cc8eISnL.o: in function `main':
    buffer-overflow-01.c:(.text+0x11): Warnung:the `gets' function is dangerous and should not be used.
    cassini/home/peter/bo/2022ss/bs/20220516> ./buffer-overflow-01
    Peter
    Guten Tag, Peter!
    cassini/home/peter/bo/2022ss/bs/20220516> ./buffer-overflow-01
    Prof. Dr. rer. nat. Peter Gerwinski
    Guten Tag, Prof. Dr. rer. nat. Peter Gerwinski!
    cassini/home/peter/bo/2022ss/bs/20220516> ./buffer-overflow-01
    Prof. Dr. rer. nat. Dipl.-Phys. Peter Gerwinski
    Guten Tag, Prof. Dr. rer. nat. Dipl.-Phys. Peter Gerwinski!
    Speicherzugriffsfehler
    cassini/home/peter/bo/2022ss/bs/20220516>