| /* getresuid -- fetch real user ID, effective user ID, and saved-set user ID |
| Copyright (C) 2002-2014 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 |
| <http://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; |
| uid_t real, eff, saved; |
| |
| 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 |
| { |
| real = _hurd_id.aux.uids[0]; |
| eff = _hurd_id.gen.nuids < 1 ? real : _hurd_id.gen.uids[0]; |
| saved = _hurd_id.aux.nuids < 2 ? real : _hurd_id.aux.uids[1]; |
| } |
| } |
| |
| __mutex_unlock (&_hurd_id.lock); |
| HURD_CRITICAL_END; |
| |
| if (err) |
| return __hurd_fail (err); |
| |
| *ruid = real; |
| *euid = eff; |
| *suid = saved; |
| return 0; |
| } |
| libc_hidden_def (__getresuid) |
| weak_alias (__getresuid, getresuid) |