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d4697bc9 | 1 | /* Copyright (C) 1993-2014 Free Software Foundation, Inc. |
c84142e8 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
c84142e8 | 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. | |
28f540f4 | 8 | |
c84142e8 UD |
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. |
28f540f4 | 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 | #include <string.h> | |
21 | ||
22 | int | |
2d6d0728 | 23 | geteuids (int n, uid_t *uidset) |
28f540f4 RM |
24 | { |
25 | error_t err; | |
26 | int nuids; | |
27 | void *crit; | |
28 | ||
29 | crit = _hurd_critical_section_lock (); | |
30 | __mutex_lock (&_hurd_id.lock); | |
31 | ||
32 | if (err = _hurd_check_ids ()) | |
33 | { | |
34 | __mutex_unlock (&_hurd_id.lock); | |
35 | _hurd_critical_section_unlock (crit); | |
36 | return __hurd_fail (err); | |
37 | } | |
38 | ||
39 | nuids = _hurd_id.gen.nuids; | |
40 | ||
41 | if (n != 0) | |
42 | { | |
43 | /* Copy the uids onto stack storage and then release the idlock. */ | |
44 | uid_t uids[nuids]; | |
45 | memcpy (uids, _hurd_id.gen.uids, sizeof (uids)); | |
46 | __mutex_unlock (&_hurd_id.lock); | |
47 | _hurd_critical_section_unlock (crit); | |
48 | ||
49 | /* Now that the lock is released, we can safely copy the | |
50 | uid set into the user's array, which might fault. */ | |
51 | if (nuids > n) | |
52 | nuids = n; | |
53 | memcpy (uidset, uids, nuids * sizeof (uid_t)); | |
54 | } | |
55 | else | |
56 | { | |
57 | __mutex_unlock (&_hurd_id.lock); | |
58 | _hurd_critical_section_unlock (crit); | |
59 | } | |
60 | ||
61 | return nuids; | |
62 | } | |
aab217f3 RM |
63 | |
64 | /* XXX Remove this alias when we bump the libc soname. */ | |
65 | ||
3f2e46a4 | 66 | #ifdef SHARED |
aab217f3 RM |
67 | weak_alias (geteuids, __getuids) |
68 | #endif |