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f7a9f785 | 1 | /* Copyright (C) 1993-2016 Free Software Foundation, Inc. |
c84142e8 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
c84142e8 UD |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
c84142e8 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
17 | |
18 | #include <hurd.h> | |
19 | #include <hurd/id.h> | |
20 | ||
21 | /* Set the uid set for the current user to UIDS (N of them). */ | |
22 | int | |
2d6d0728 | 23 | seteuids (int n, const uid_t *uids) |
28f540f4 RM |
24 | { |
25 | error_t err; | |
26 | auth_t newauth; | |
1e9dc039 | 27 | int i; |
28f540f4 RM |
28 | gid_t new[n]; |
29 | ||
30 | /* Fault before taking locks. */ | |
31 | for (i = 0; i < n; ++i) | |
32 | new[i] = uids[i]; | |
33 | ||
34 | HURD_CRITICAL_BEGIN; | |
35 | __mutex_lock (&_hurd_id.lock); | |
36 | err = _hurd_check_ids (); | |
37 | if (! err) | |
38 | { | |
39 | /* Get a new auth port using those IDs. */ | |
40 | err = __USEPORT (AUTH, | |
41 | __auth_makeauth (port, NULL, 0, 0, | |
42 | new, n, | |
43 | _hurd_id.aux.uids, _hurd_id.aux.nuids, | |
44 | _hurd_id.gen.gids, _hurd_id.gen.ngids, | |
45 | _hurd_id.aux.gids, _hurd_id.aux.ngids, | |
46 | &newauth)); | |
47 | } | |
48 | __mutex_unlock (&_hurd_id.lock); | |
49 | HURD_CRITICAL_END; | |
50 | ||
51 | if (err) | |
52 | return __hurd_fail (err); | |
53 | ||
54 | /* Install the new auth port and reauthenticate everything. */ | |
55 | err = __setauth (newauth); | |
56 | __mach_port_deallocate (__mach_task_self (), newauth); | |
57 | return err; | |
58 | } |