1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2014 Tom Gundersen <teg@jklm.no>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include "sd-event.h"
#include "sd-daemon.h"
#include "mkdir.h"
#include "capability.h"
#include "resolved-manager.h"
#include "resolved-conf.h"
int main(int argc, char *argv[]) {
_cleanup_(manager_freep) Manager *m = NULL;
const char *user = "systemd-resolve";
uid_t uid;
gid_t gid;
int r;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
if (argc != 1) {
log_error("This program takes no arguments.");
r = -EINVAL;
goto finish;
}
r = get_user_creds(&user, &uid, &gid, NULL, NULL);
if (r < 0) {
log_error("Cannot resolve user name %s: %s", user, strerror(-r));
goto finish;
}
/* Always create the directory where resolv.conf will live */
r = mkdir_safe_label("/run/systemd/resolve", 0755, uid, gid);
if (r < 0) {
log_error("Could not create runtime directory: %s", strerror(-r));
goto finish;
}
r = drop_privileges(uid, gid, 0);
if (r < 0)
goto finish;
assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
r = manager_new(&m);
if (r < 0) {
log_error("Could not create manager: %s", strerror(-r));
goto finish;
}
r = manager_parse_config_file(m);
if (r < 0)
log_warning("Failed to parse configuration file: %s", strerror(-r));
r = manager_start(m);
if (r < 0) {
log_error("Failed to start manager: %s", strerror(-r));
goto finish;
}
/* Write finish default resolv.conf to avoid a dangling
* symlink */
r = manager_write_resolv_conf(m);
if (r < 0)
log_warning("Could not create resolv.conf: %s", strerror(-r));
sd_notify(false,
"READY=1\n"
"STATUS=Processing requests...");
r = sd_event_loop(m->event);
if (r < 0) {
log_error("Event loop failed: %s", strerror(-r));
goto finish;
}
sd_event_get_exit_code(m->event, &r);
finish:
sd_notify(false, "STATUS=Shutting down...");
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
|
