narnia0@melinda:/narnia$ cat narnia0.c
/*
  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 2 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, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>

int main(){
  long val = 0x41414141;
  char buf[20];

  printf("Correct val's value from 0x41414141 -> 0xdeadbeef!\n");
  printf("Here is your chance: ");
  scanf("%24s", &buf);

  printf("buf: %s\n", buf);
  printf("val: 0x%08x\n", val);

  if(val == 0xdeadbeef)
      system("/bin/sh");
  else{
      printf("WAY OFF!!!!\n");
      exit(1);
  }

  return 0;
}