setregid(2)                                           setregid(2)



     NAME
          setregid - set real and effective group ID

     SYNOPSIS
          setregid(rgid, egid)
          int rgid, egid;

     DESCRIPTION
          The real and effective group ID's of the current process are
          set to the arguments.  Only the super-user may change the
          real group ID of a process.  Unpriviledged users may change
          the effective group ID to the real group ID, but to no
          other.

          Supplying a value of -1 for either the real or effective
          group ID forces the system to substitute the current ID in
          place of the -1 parameter.

     RETURN VALUE
          Upon successful completion, a value of 0 is returned.
          Otherwise, a value of -1 is returned and errno is set to
          indicate the error.

     ERRORS
          [EPERM]    The current process is not the super-user and a
                     change other than changing the effective group ID
                     to the real group ID was specified.

     SEE ALSO
          getgid(2), setreuid(2), setgid(3).

























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