/* FILE: provac.c */
#include <stdio.h>
#include <fcntl.h>

main()
{
FILE *f;
char c;

printf("real-user id = %d\n", getuid());
printf("effective-user id = %d\n", geteuid());
puts("SONO provac");
puts("Sto per leggere il file pippo");

if ((f=fopen("pippo", "r")) == 0)
        { puts("ERRORE in apertura");
          exit(-1);
          }


while (fread(&c, 1,  1,f) > 0)
  fwrite(&c, 1, 1, stdout);
}