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/* getresgid -- fetch effective group ID, real group ID, and saved-set group ID
Copyright (C) 2002 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <unistd.h>
#include <hurd.h>
#include <hurd/id.h>
/* Fetch the effective group ID, real group ID, and saved-set group ID,
of the calling process. */
int
__getresgid (gid_t *egid, gid_t *rgid, gid_t *sgid)
{
error_t err;
gid_t eff, real, saved;
HURD_CRITICAL_BEGIN;
__mutex_lock (&_hurd_id.lock);
err = _hurd_check_ids ();
if (!err)
{
if (_hurd_id.aux.ngids < 1)
/* We do not even have a real GID. */
err = EGRATUITOUS;
else
{
real = _hurd_id.aux.gids[0];
saved = _hurd_id.aux.ngids < 2 ? real :_hurd_id.aux.gids[1];
eff = _hurd_id.gen.ngids < 1 ? real : _hurd_id.gen.gids[0];
}
}
__mutex_unlock (&_hurd_id.lock);
HURD_CRITICAL_END;
if (err)
return __hurd_fail (err);
*egid = eff;
*rgid = real;
*sgid = saved;
return 0;
}
libc_hidden_def (__getresgid)
weak_alias (__getresgid, getresgid)
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