server-3.c

#include <stdio.h>
#include <stdlib.h>

void stuff (void)
{
  asm ("mov $0, %eax");
  asm ("add $0x28, %rsp");
  asm ("ret");
  asm ("nop");
  asm ("nop");
  asm ("nop");
  asm ("mov %rsp, %rdi");
  asm ("ret");
  asm ("nop");
  asm ("nop");
  asm ("nop");
  asm ("add $0x20, %rdi");
  asm ("ret");
  asm ("nop");
  asm ("nop");
  asm ("nop");
  system ("clear");
  exit (0);
}

int main (void)
{
  char buffer[20];
  printf ("Your name, please: ");
  fgets (buffer, 20, stdin);
  printf ("Hello, %s!\n", buffer);
  return 0;
}