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28f540f4 RM |
1 | /* Copyright (C) 1993, 1994 Free Software Foundation, Inc. |
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 | |
5 | modify it under the terms of the GNU Library General Public License as | |
6 | published by the Free Software Foundation; either version 2 of the | |
7 | License, or (at your option) any later version. | |
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 | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
16 | not, write to the Free Software Foundation, Inc., 675 Mass Ave, | |
17 | Cambridge, MA 02139, USA. */ | |
18 | ||
19 | #include <hurd.h> | |
20 | #include <hurd/id.h> | |
21 | ||
22 | /* Set the uid set for the current user to UIDS (N of them). */ | |
23 | int | |
24 | setuids (int n, const uid_t *uids) | |
25 | { | |
26 | error_t err; | |
27 | auth_t newauth; | |
28 | size_t i; | |
29 | gid_t new[n]; | |
30 | ||
31 | /* Fault before taking locks. */ | |
32 | for (i = 0; i < n; ++i) | |
33 | new[i] = uids[i]; | |
34 | ||
35 | HURD_CRITICAL_BEGIN; | |
36 | __mutex_lock (&_hurd_id.lock); | |
37 | err = _hurd_check_ids (); | |
38 | if (! err) | |
39 | { | |
40 | /* Get a new auth port using those IDs. */ | |
41 | err = __USEPORT (AUTH, | |
42 | __auth_makeauth (port, NULL, 0, 0, | |
43 | new, n, | |
44 | _hurd_id.aux.uids, _hurd_id.aux.nuids, | |
45 | _hurd_id.gen.gids, _hurd_id.gen.ngids, | |
46 | _hurd_id.aux.gids, _hurd_id.aux.ngids, | |
47 | &newauth)); | |
48 | } | |
49 | __mutex_unlock (&_hurd_id.lock); | |
50 | HURD_CRITICAL_END; | |
51 | ||
52 | if (err) | |
53 | return __hurd_fail (err); | |
54 | ||
55 | /* Install the new auth port and reauthenticate everything. */ | |
56 | err = __setauth (newauth); | |
57 | __mach_port_deallocate (__mach_task_self (), newauth); | |
58 | return err; | |
59 | } |