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780896a4 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
780896a4 LP |
20 | #include <string.h> |
21 | ||
780896a4 | 22 | #include "errno-list.h" |
11c3a366 | 23 | #include "macro.h" |
780896a4 LP |
24 | |
25 | static const struct errno_name* lookup_errno(register const char *str, | |
d469dd44 | 26 | register unsigned int len); |
780896a4 | 27 | |
780896a4 | 28 | #include "errno-from-name.h" |
cf0fbc49 | 29 | #include "errno-to-name.h" |
780896a4 LP |
30 | |
31 | const char *errno_to_name(int id) { | |
32 | ||
33 | if (id < 0) | |
34 | id = -id; | |
35 | ||
36 | if (id >= (int) ELEMENTSOF(errno_names)) | |
37 | return NULL; | |
38 | ||
39 | return errno_names[id]; | |
40 | } | |
41 | ||
42 | int errno_from_name(const char *name) { | |
43 | const struct errno_name *sc; | |
44 | ||
45 | assert(name); | |
46 | ||
47 | sc = lookup_errno(name, strlen(name)); | |
48 | if (!sc) | |
d469dd44 | 49 | return -EINVAL; |
780896a4 | 50 | |
d469dd44 | 51 | assert(sc->id > 0); |
780896a4 LP |
52 | return sc->id; |
53 | } | |
54 | ||
55 | int errno_max(void) { | |
56 | return ELEMENTSOF(errno_names); | |
57 | } |