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/*-*- 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 "resolved.h"
#include "mkdir.h"
#include "capability.h"
int main(int argc, char *argv[]) {
_cleanup_manager_free_ 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 out;
}
r = get_user_creds(&user, &uid, &gid, NULL, NULL);
if (r < 0) {
log_error("Cannot resolve user name %s: %s", user, strerror(-r));
goto out;
}
/* 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 out;
}
r = drop_privileges(uid, gid, 0);
if (r < 0)
goto out;
r = manager_new(&m);
if (r < 0) {
log_error("Could not create manager: %s", strerror(-r));
goto out;
}
r = manager_network_monitor_listen(m);
if (r < 0) {
log_error("Could not listen for network events: %s", strerror(-r));
goto out;
}
/* write out default resolv.conf to avoid a
* dangling symlink */
r = manager_update_resolv_conf(m);
if (r < 0) {
log_error("Could not create resolv.conf: %s", strerror(-r));
goto out;
}
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 out;
}
out:
sd_notify(false,
"STATUS=Shutting down...");
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
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