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- /* Copyright (C) 1991, 1992 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 <hurd.h>
-
- /* Return the effective uid set. */
- int
- getuids (int n, uid_t *uidset)
- {
- int nuids;
-
- __mutex_lock (&_hurd_idlock);
- if (!_hurd_id_valid)
- {
- error_t err = _HURD_PORT_USE (&_hurd_auth,
- __auth_getids (port, &_hurd_id));
- if (err)
- {
- __mutex_unlock (&_hurd_idlock);
- return __hurd_fail (err);
- }
- _hurd_id_valid = 1;
- }
- nuids = _hurd_id.nuids;
- if (uidset != NULL)
- {
- /* Copy into a temporary array before releasing the lock. */
- uid_t uids[nuids];
- memcpy (uids, _hurd_id.uids, sizeof (uids));
- __mutex_unlock (&_hurd_idlock);
- /* Lock is released; now copy into user array, which might fault. */
- memcpy (uidset, uids, sizeof (uids));
- }
- else
- __mutex_unlock (&_hurd_idlock);
-
- return nuids;
- }
-