main (argc, argv)
{
printf ("%d; %d\n", getuid (), geteuid());
seteuid (1);
printf ("%d; %d\n", getuid (), geteuid());
seteuid (0);
printf ("%d; %d\n", getuid (), geteuid());
setruid (1);
printf ("%d; %d\n", getuid (), geteuid());
setruid (0);
printf ("%d; %d\n", getuid (), geteuid());
}