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- /* Copyright (C) 1993, 1994 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <errno.h>
- #include <unistd.h>
- #include <hurd.h>
- #include <hurd/id.h>
-
- /* Get the effective group ID of the calling process. */
- gid_t
- DEFUN_VOID(__getegid)
- {
- error_t err;
- gid_t egid;
-
- HURD_CRITICAL_BEGIN;
- __mutex_lock (&_hurd_id.lock);
-
- if (err = _hurd_check_ids ())
- {
- errno = err;
- egid = -1;
- }
- else if (_hurd_id.gen.ngids >= 1)
- egid = _hurd_id.gen.gids[0];
- else if (_hurd_id.aux.ngids >= 1)
- /* We have no effective gids. Return the real gid. */
- egid = _hurd_id.aux.gids[0];
- else
- {
- /* We do not even have a real gid. */
- errno = EGRATUITOUS;
- egid = -1;
- }
-
- __mutex_unlock (&_hurd_id.lock);
- HURD_CRITICAL_END;
-
- return egid;
- }
-