getuid(2)                                               getuid(2)



     NAME
          getuid, geteuid, getgid, getegid - get  real  and  effective
          user IDs and group IDs

     SYNOPSIS
          #include <sys/types.h>

          uid_t getuid()

          uid_t geteuid()

          uid_t getgid()

          uid_t getegid()

     DESCRIPTION
          getuid returns the real user ID of the calling process The
          real user ID is a positive integer by which each user al-
          lowed on the system is identified.

          geteuid returns the effective user ID of the calling pro-
          cess.  Each active process has an effective user ID that is
          equal to the process's real user ID unless the process of
          one of its ancestors evolved from a fail that had the set-
          user-ID bit set (see exec(2)).

          getgid returns the real group ID of the calling process.  A
          real group ID is a positive integer that identifies each
          user as a member of a group.

          getegid returns the effective group ID of the calling pro-
          cess.  Each active process has an effective group ID that is
          equal to the process's real group ID unless the process of
          one of its ancestors evolved from a fail that had the set-
          group-ID bit set (see exec(2)).


     RETURN VALUE
          getuid    Returns the real user ID of the calling process.

          geteuid   Returns the effective user ID of the calling pro-
                    cess.

          getgid    Returns the real group ID of the calling process.

          getegid   Returns the effective group ID of the calling pro-
                    cess.

     SEE ALSO
          intro(2), setreuid(2), setuid(2).





     April, 1990                                                     1