61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
|
/* getresgid -- fetch real group ID, effective group ID, and saved-set group ID
|
||
|
|
Copyright (C) 2002-2022 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, see
|
||
|
|
<https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <hurd.h>
|
||
|
|
#include <hurd/id.h>
|
||
|
|
|
||
|
|
/* Fetch the real group ID, effective group ID, and saved-set group ID,
|
||
|
|
of the calling process. */
|
||
|
|
int
|
||
|
|
__getresgid (gid_t *rgid, gid_t *egid, gid_t *sgid)
|
||
|
|
{
|
||
|
|
error_t err;
|
||
|
|
|
||
|
|
retry:
|
||
|
|
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
|
||
|
|
{
|
||
|
|
gid_t real = _hurd_id.aux.gids[0];
|
||
|
|
|
||
|
|
*rgid = real;
|
||
|
|
*egid = _hurd_id.gen.ngids < 1 ? real : _hurd_id.gen.gids[0];
|
||
|
|
*sgid = _hurd_id.aux.ngids < 2 ? real : _hurd_id.aux.gids[1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
__mutex_unlock (&_hurd_id.lock);
|
||
|
|
HURD_CRITICAL_END;
|
||
|
|
if (err == EINTR)
|
||
|
|
/* Got a signal while inside an RPC of the critical section, retry again */
|
||
|
|
goto retry;
|
||
|
|
|
||
|
|
return __hurd_fail (err);
|
||
|
|
}
|
||
|
|
libc_hidden_def (__getresgid)
|
||
|
|
weak_alias (__getresgid, getresgid)
|