int main(void)
{

int current_uid = getuid();
printf(“My UID is: %d. My GID is: %d\n”, current_uid, getgid());
system(“/usr/bin/id”);

if (setuid(0))
{

perror(“setuid”);
return 1;

}

//I am now root!
printf(“My UID is: %d. My GID is: %d\n”, getuid(), getgid());
system(“/usr/bin/id”);

//Time to drop back to regular user priviledges
setuid(current_uid);
printf(“My UID is: %d. My GID is: %d\n”, getuid(), getgid());
system(“/usr/bin/id”);

return 0;

}