mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 13:30:06 +00:00
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/* getresuid -- fetch real user ID, effective user ID, and saved-set user ID
|
|
Copyright (C) 2002-2023 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 user ID, effective user ID, and saved-set user ID,
|
|
of the calling process. */
|
|
int
|
|
__getresuid (uid_t *ruid, uid_t *euid, uid_t *suid)
|
|
{
|
|
error_t err;
|
|
|
|
retry:
|
|
HURD_CRITICAL_BEGIN;
|
|
__mutex_lock (&_hurd_id.lock);
|
|
|
|
err = _hurd_check_ids ();
|
|
if (!err)
|
|
{
|
|
if (_hurd_id.aux.nuids < 1)
|
|
/* We do not even have a real UID. */
|
|
err = EGRATUITOUS;
|
|
else
|
|
{
|
|
uid_t real = _hurd_id.aux.uids[0];
|
|
|
|
*ruid = real;
|
|
*euid = _hurd_id.gen.nuids < 1 ? real : _hurd_id.gen.uids[0];
|
|
*suid = _hurd_id.aux.nuids < 2 ? real : _hurd_id.aux.uids[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 (__getresuid)
|
|
weak_alias (__getresuid, getresuid)
|