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b168057a | 1 | /* Copyright (C) 1993-2015 Free Software Foundation, Inc. |
ebbad4cc | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ebbad4cc | 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 | |
ebbad4cc 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 | 17 | |
28f540f4 RM |
18 | #include <errno.h> |
19 | #include <unistd.h> | |
20 | #include <hurd.h> | |
21 | #include <hurd/id.h> | |
22 | ||
23 | /* Get the effective user ID of the calling process. */ | |
24 | uid_t | |
60d2f8f3 | 25 | __geteuid (void) |
28f540f4 RM |
26 | { |
27 | error_t err; | |
28 | uid_t euid; | |
29 | ||
30 | HURD_CRITICAL_BEGIN; | |
31 | __mutex_lock (&_hurd_id.lock); | |
32 | ||
33 | if (err = _hurd_check_ids ()) | |
34 | { | |
35 | errno = err; | |
36 | euid = -1; | |
37 | } | |
38 | else if (_hurd_id.gen.nuids >= 1) | |
39 | euid = _hurd_id.gen.uids[0]; | |
40 | else if (_hurd_id.aux.nuids >= 1) | |
41 | /* We have no effective uids. Return the real uid. */ | |
42 | euid = _hurd_id.aux.uids[0]; | |
43 | else | |
44 | { | |
45 | /* We do not even have a real uid. */ | |
46 | errno = EGRATUITOUS; | |
47 | euid = -1; | |
48 | } | |
49 | ||
50 | __mutex_unlock (&_hurd_id.lock); | |
51 | HURD_CRITICAL_END; | |
52 | ||
53 | return euid; | |
54 | } | |
55 | ||
56 | weak_alias (__geteuid, geteuid) |