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1/* Copyright (C) 1993-2019 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 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.
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 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <hurd.h>
19#include <hurd/id.h>
20#include <string.h>
21
22int
23geteuids (int n, uid_t *uidset)
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}
63
64/* XXX Remove this alias when we bump the libc soname. */
65
66#ifdef SHARED
67weak_alias (geteuids, __getuids)
68#endif
69

Warning: That file was not part of the compilation database. It may have many parsing errors.