-/***
- This file is part of systemd.
-
- Copyright 2014 Kay Sievers, Lennart Poettering
-
- 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/>.
-***/
+/* SPDX-License-Identifier: LGPL-2.1+ */
#include "sd-daemon.h"
#include "sd-event.h"
#include "capability-util.h"
#include "clock-util.h"
+#include "daemon-util.h"
#include "fd-util.h"
#include "fs-util.h"
+#include "main-func.h"
#include "mkdir.h"
#include "network-util.h"
#include "process-util.h"
#include "signal-util.h"
+#include "timesyncd-bus.h"
#include "timesyncd-conf.h"
#include "timesyncd-manager.h"
#include "user-util.h"
+#define STATE_DIR "/var/lib/systemd/timesync"
+#define CLOCK_FILE STATE_DIR "/clock"
+
static int load_clock_timestamp(uid_t uid, gid_t gid) {
_cleanup_close_ int fd = -1;
usec_t min = TIME_EPOCH * USEC_PER_SEC;
* systems lacking a battery backed RTC. We also will adjust
* the time to at least the build time of systemd. */
- fd = open("/var/lib/systemd/timesync/clock", O_RDWR|O_CLOEXEC, 0644);
+ fd = open(CLOCK_FILE, O_RDWR|O_CLOEXEC, 0644);
if (fd >= 0) {
struct stat st;
usec_t stamp;
if (geteuid() == 0) {
/* Try to fix the access mode, so that we can still
touch the file after dropping priviliges */
- r = fchmod(fd, 0644);
+ r = fchmod_and_chown(fd, 0644, uid, gid);
if (r < 0)
- return log_error_errno(errno, "Failed to change file access mode: %m");
- r = fchown(fd, uid, gid);
- return log_error_errno(errno, "Failed to change file owner: %m");
+ log_warning_errno(r, "Failed to chmod or chown %s, ignoring: %m", CLOCK_FILE);
}
} else {
- r = mkdir_safe_label("/var/lib/systemd/timesync", 0755, uid, gid);
- if (r < 0)
- return log_error_errno(r, "Failed to create state directory: %m");
+ r = mkdir_safe_label(STATE_DIR, 0755, uid, gid,
+ MKDIR_FOLLOW_SYMLINK | MKDIR_WARN_MODE);
+ if (r < 0) {
+ log_debug_errno(r, "Failed to create state directory, ignoring: %m");
+ goto settime;
+ }
/* create stamp file with the compiled-in date */
- (void) touch_file("/var/lib/systemd/timesync/clock", false, min, uid, gid, 0644);
+ r = touch_file(CLOCK_FILE, false, min, uid, gid, 0644);
+ if (r < 0)
+ log_debug_errno(r, "Failed to create %s, ignoring: %m", CLOCK_FILE);
}
+settime:
ct = now(CLOCK_REALTIME);
if (ct < min) {
struct timespec ts;
format_timestamp(date, sizeof(date), min));
if (clock_settime(CLOCK_REALTIME, timespec_store(&ts, min)) < 0)
- log_error_errno(errno, "Failed to restore system clock: %m");
+ log_error_errno(errno, "Failed to restore system clock, ignoring: %m");
}
return 0;
}
-int main(int argc, char *argv[]) {
+static int run(int argc, char *argv[]) {
+ _cleanup_(notify_on_cleanup) const char *notify_message = NULL;
_cleanup_(manager_freep) Manager *m = NULL;
const char *user = "systemd-timesync";
- uid_t uid;
+ uid_t uid, uid_current;
gid_t gid;
int r;
- log_set_target(LOG_TARGET_AUTO);
log_set_facility(LOG_CRON);
- log_parse_environment();
- log_open();
+ log_setup_service();
umask(0022);
- if (argc != 1) {
- log_error("This program does not take arguments.");
- r = -EINVAL;
- goto finish;
- }
+ if (argc != 1)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program does not take arguments.");
+
+ uid = uid_current = geteuid();
+ gid = getegid();
- r = get_user_creds(&user, &uid, &gid, NULL, NULL);
- if (r < 0) {
- log_error_errno(r, "Cannot resolve user name %s: %m", user);
- goto finish;
+ if (uid_current == 0) {
+ r = get_user_creds(&user, &uid, &gid, NULL, NULL, 0);
+ if (r < 0)
+ return log_error_errno(r, "Cannot resolve user name %s: %m", user);
}
r = load_clock_timestamp(uid, gid);
if (r < 0)
- goto finish;
+ return r;
/* Drop privileges, but only if we have been started as root. If we are not running as root we assume all
* privileges are already dropped. */
- if (geteuid() == 0) {
+ if (uid_current == 0) {
r = drop_privileges(uid, gid, (1ULL << CAP_SYS_TIME));
if (r < 0)
- goto finish;
+ return log_error_errno(r, "Failed to drop privileges: %m");
}
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0);
r = manager_new(&m);
- if (r < 0) {
- log_error_errno(r, "Failed to allocate manager: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate manager: %m");
+
+ r = manager_connect_bus(m);
+ if (r < 0)
+ return log_error_errno(r, "Could not connect to bus: %m");
if (clock_is_localtime(NULL) > 0) {
log_info("The system is configured to read the RTC time in the local time zone. "
- "This mode can not be fully supported. All system time to RTC updates are disabled.");
+ "This mode cannot be fully supported. All system time to RTC updates are disabled.");
m->rtc_local_time = true;
}
log_warning_errno(r, "Failed to parse configuration file: %m");
r = manager_parse_fallback_string(m, NTP_SERVERS);
- if (r < 0) {
- log_error_errno(r, "Failed to parse fallback server strings: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse fallback server strings: %m");
log_debug("systemd-timesyncd running as pid " PID_FMT, getpid_cached());
- sd_notify(false,
- "READY=1\n"
- "STATUS=Daemon is running");
+
+ notify_message = notify_start("READY=1\n"
+ "STATUS=Daemon is running",
+ NOTIFY_STOPPING);
if (network_is_online()) {
r = manager_connect(m);
if (r < 0)
- goto finish;
+ return r;
}
r = sd_event_loop(m->event);
- if (r < 0) {
- log_error_errno(r, "Failed to run event loop: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to run event loop: %m");
/* if we got an authoritative time, store it in the file system */
- if (m->sync)
- (void) touch("/var/lib/systemd/timesync/clock");
-
- sd_event_get_exit_code(m->event, &r);
-
-finish:
- sd_notify(false,
- "STOPPING=1\n"
- "STATUS=Shutting down...");
+ if (m->sync) {
+ r = touch(CLOCK_FILE);
+ if (r < 0)
+ log_debug_errno(r, "Failed to touch %s, ignoring: %m", CLOCK_FILE);
+ }
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return 0;
}
+
+DEFINE_MAIN_FUNCTION(run);
projects / thirdparty / systemd.git / blobdiff