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091a364c TG |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Tom Gundersen <teg@jklm.no> | |
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 | ||
091a364c | 22 | #include "sd-daemon.h" |
b1d4f8e1 LP |
23 | #include "sd-event.h" |
24 | ||
430f0182 | 25 | #include "capability-util.h" |
b1d4f8e1 LP |
26 | #include "mkdir.h" |
27 | #include "resolved-conf.h" | |
28 | #include "resolved-manager.h" | |
f8dc7e34 | 29 | #include "resolved-resolv-conf.h" |
d7b8eec7 | 30 | #include "selinux-util.h" |
24882e06 | 31 | #include "signal-util.h" |
b1d4f8e1 | 32 | #include "user-util.h" |
4e945a6f | 33 | |
091a364c | 34 | int main(int argc, char *argv[]) { |
74b2466e | 35 | _cleanup_(manager_freep) Manager *m = NULL; |
682265d5 TG |
36 | const char *user = "systemd-resolve"; |
37 | uid_t uid; | |
38 | gid_t gid; | |
091a364c TG |
39 | int r; |
40 | ||
41 | log_set_target(LOG_TARGET_AUTO); | |
42 | log_parse_environment(); | |
43 | log_open(); | |
44 | ||
091a364c TG |
45 | if (argc != 1) { |
46 | log_error("This program takes no arguments."); | |
47 | r = -EINVAL; | |
74b2466e | 48 | goto finish; |
091a364c TG |
49 | } |
50 | ||
a5a807e6 ZJS |
51 | umask(0022); |
52 | ||
cc56fafe | 53 | r = mac_selinux_init(NULL); |
a5a807e6 | 54 | if (r < 0) { |
da927ba9 | 55 | log_error_errno(r, "SELinux setup failed: %m"); |
a5a807e6 ZJS |
56 | goto finish; |
57 | } | |
58 | ||
682265d5 TG |
59 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); |
60 | if (r < 0) { | |
da927ba9 | 61 | log_error_errno(r, "Cannot resolve user name %s: %m", user); |
74b2466e | 62 | goto finish; |
682265d5 TG |
63 | } |
64 | ||
091a364c | 65 | /* Always create the directory where resolv.conf will live */ |
682265d5 TG |
66 | r = mkdir_safe_label("/run/systemd/resolve", 0755, uid, gid); |
67 | if (r < 0) { | |
da927ba9 | 68 | log_error_errno(r, "Could not create runtime directory: %m"); |
74b2466e | 69 | goto finish; |
682265d5 TG |
70 | } |
71 | ||
72 | r = drop_privileges(uid, gid, 0); | |
73 | if (r < 0) | |
74b2466e | 74 | goto finish; |
091a364c | 75 | |
4d506d6b | 76 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGUSR1, -1) >= 0); |
b9e7a9d8 | 77 | |
091a364c TG |
78 | r = manager_new(&m); |
79 | if (r < 0) { | |
da927ba9 | 80 | log_error_errno(r, "Could not create manager: %m"); |
74b2466e | 81 | goto finish; |
091a364c TG |
82 | } |
83 | ||
edc501d4 LP |
84 | r = manager_start(m); |
85 | if (r < 0) { | |
da927ba9 | 86 | log_error_errno(r, "Failed to start manager: %m"); |
edc501d4 LP |
87 | goto finish; |
88 | } | |
89 | ||
4e945a6f | 90 | /* Write finish default resolv.conf to avoid a dangling |
74b2466e LP |
91 | * symlink */ |
92 | r = manager_write_resolv_conf(m); | |
4e945a6f | 93 | if (r < 0) |
77abf3c1 | 94 | log_warning_errno(r, "Could not create "PRIVATE_RESOLV_CONF": %m"); |
091a364c TG |
95 | |
96 | sd_notify(false, | |
97 | "READY=1\n" | |
98 | "STATUS=Processing requests..."); | |
99 | ||
100 | r = sd_event_loop(m->event); | |
101 | if (r < 0) { | |
da927ba9 | 102 | log_error_errno(r, "Event loop failed: %m"); |
74b2466e | 103 | goto finish; |
091a364c TG |
104 | } |
105 | ||
96e6e394 LP |
106 | sd_event_get_exit_code(m->event, &r); |
107 | ||
74b2466e | 108 | finish: |
af4ec430 | 109 | sd_notify(false, |
b37d45c9 | 110 | "STOPPING=1\n" |
af4ec430 | 111 | "STATUS=Shutting down..."); |
091a364c TG |
112 | |
113 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
114 | } |