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/* Copyright (C) 1993, 1994, 1995 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;
}
weak_alias (__getegid, getegid)
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