| /* Copyright (C) 1993-2014 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 <hurd.h> |
| #include <hurd/id.h> |
| #include <string.h> |
| |
| int |
| geteuids (int n, uid_t *uidset) |
| { |
| error_t err; |
| int nuids; |
| void *crit; |
| |
| crit = _hurd_critical_section_lock (); |
| __mutex_lock (&_hurd_id.lock); |
| |
| if (err = _hurd_check_ids ()) |
| { |
| __mutex_unlock (&_hurd_id.lock); |
| _hurd_critical_section_unlock (crit); |
| return __hurd_fail (err); |
| } |
| |
| nuids = _hurd_id.gen.nuids; |
| |
| if (n != 0) |
| { |
| /* Copy the uids onto stack storage and then release the idlock. */ |
| uid_t uids[nuids]; |
| memcpy (uids, _hurd_id.gen.uids, sizeof (uids)); |
| __mutex_unlock (&_hurd_id.lock); |
| _hurd_critical_section_unlock (crit); |
| |
| /* Now that the lock is released, we can safely copy the |
| uid set into the user's array, which might fault. */ |
| if (nuids > n) |
| nuids = n; |
| memcpy (uidset, uids, nuids * sizeof (uid_t)); |
| } |
| else |
| { |
| __mutex_unlock (&_hurd_id.lock); |
| _hurd_critical_section_unlock (crit); |
| } |
| |
| return nuids; |
| } |
| |
| /* XXX Remove this alias when we bump the libc soname. */ |
| |
| #ifdef SHARED |
| weak_alias (geteuids, __getuids) |
| #endif |
