#include <stdio.h>
#include <pwd.h>
#include <unistd.h>
#include <sys/types.h>

int
main(int argc, char **argv)
{
  struct passwd *pw;
  uid_t euid[2];
  euid[0] = geteuid();
  /* This can be any user as long as it isn't in the local /etc/passwd
   * file, i.e. it results in an LDAP lookup. */
  pw = getpwnam("foo");
  euid[1] = geteuid();
  printf("EUID0: %i, EUID1: %i\n", (int)euid[0], (int)euid[1]);
  return 0;

}