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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
c1165f82 | 22 | |
ffc227c9 | 23 | #include <errno.h> |
c1165f82 | 24 | #include "audit-fd.h" |
c1165f82 LP |
25 | |
26 | #ifdef HAVE_AUDIT | |
27 | ||
ffc227c9 | 28 | #include <stdbool.h> |
c1165f82 LP |
29 | #include <libaudit.h> |
30 | ||
ffc227c9 LP |
31 | #include "log.h" |
32 | #include "util.h" | |
33 | ||
c1165f82 LP |
34 | static bool initialized = false; |
35 | static int audit_fd; | |
36 | ||
37 | int get_audit_fd(void) { | |
38 | ||
39 | if (!initialized) { | |
40 | audit_fd = audit_open(); | |
41 | ||
42 | if (audit_fd < 0) { | |
43 | if (errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT) | |
44 | log_error("Failed to connect to audit log: %m"); | |
45 | ||
46 | audit_fd = errno ? -errno : -EINVAL; | |
47 | } | |
48 | ||
49 | initialized = true; | |
50 | } | |
51 | ||
52 | return audit_fd; | |
53 | } | |
54 | ||
55 | void close_audit_fd(void) { | |
56 | ||
57 | if (initialized && audit_fd >= 0) | |
58 | close_nointr_nofail(audit_fd); | |
59 | ||
60 | initialized = true; | |
61 | audit_fd = -ECONNRESET; | |
62 | } | |
63 | ||
64 | #else | |
65 | ||
66 | int get_audit_fd(void) { | |
67 | return -EAFNOSUPPORT; | |
68 | } | |
69 | ||
70 | void close_audit_fd(void) { | |
71 | } | |
72 | ||
73 | #endif |