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b5567b2a | 1 | /* Copyright (C) 1993, 94, 96, 97, 98, 2000 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 AJ |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
28f540f4 RM |
18 | |
19 | #include <hurd.h> | |
20 | #include <hurd/id.h> | |
21 | #include <string.h> | |
22 | ||
23 | int | |
2d6d0728 | 24 | geteuids (int n, uid_t *uidset) |
28f540f4 RM |
25 | { |
26 | error_t err; | |
27 | int nuids; | |
28 | void *crit; | |
29 | ||
30 | crit = _hurd_critical_section_lock (); | |
31 | __mutex_lock (&_hurd_id.lock); | |
32 | ||
33 | if (err = _hurd_check_ids ()) | |
34 | { | |
35 | __mutex_unlock (&_hurd_id.lock); | |
36 | _hurd_critical_section_unlock (crit); | |
37 | return __hurd_fail (err); | |
38 | } | |
39 | ||
40 | nuids = _hurd_id.gen.nuids; | |
41 | ||
42 | if (n != 0) | |
43 | { | |
44 | /* Copy the uids onto stack storage and then release the idlock. */ | |
45 | uid_t uids[nuids]; | |
46 | memcpy (uids, _hurd_id.gen.uids, sizeof (uids)); | |
47 | __mutex_unlock (&_hurd_id.lock); | |
48 | _hurd_critical_section_unlock (crit); | |
49 | ||
50 | /* Now that the lock is released, we can safely copy the | |
51 | uid set into the user's array, which might fault. */ | |
52 | if (nuids > n) | |
53 | nuids = n; | |
54 | memcpy (uidset, uids, nuids * sizeof (uid_t)); | |
55 | } | |
56 | else | |
57 | { | |
58 | __mutex_unlock (&_hurd_id.lock); | |
59 | _hurd_critical_section_unlock (crit); | |
60 | } | |
61 | ||
62 | return nuids; | |
63 | } | |
aab217f3 RM |
64 | |
65 | /* XXX Remove this alias when we bump the libc soname. */ | |
66 | ||
b5567b2a | 67 | #if defined SHARED && DO_VERSIONING |
aab217f3 RM |
68 | weak_alias (geteuids, __getuids) |
69 | #endif |