+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- 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/>.
-***/
-
-#include "sd-event.h"
-#include "sd-daemon.h"
-#include "capability.h"
-#include "clock-util.h"
-#include "network-util.h"
-
-#include "timesyncd-manager.h"
-#include "timesyncd-conf.h"
-
-static int load_clock_timestamp(uid_t uid, gid_t gid) {
- _cleanup_close_ int fd = -1;
- usec_t min = TIME_EPOCH * USEC_PER_SEC;
- usec_t ct;
- int r;
-
- /* Let's try to make sure that the clock is always
- * monotonically increasing, by saving the clock whenever we
- * have a new NTP time, or when we shut down, and restoring it
- * when we start again. This is particularly helpful on
- * 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/clock", O_RDWR|O_CLOEXEC, 0644);
- if (fd >= 0) {
- struct stat st;
- usec_t stamp;
-
- /* check if the recorded time is later than the compiled-in one */
- r = fstat(fd, &st);
- if (r >= 0) {
- stamp = timespec_load(&st.st_mtim);
- if (stamp > min)
- min = stamp;
- }
-
- /* Try to fix the access mode, so that we can still
- touch the file after dropping priviliges */
- fchmod(fd, 0644);
- fchown(fd, uid, gid);
-
- } else
- /* create stamp file with the compiled-in date */
- touch_file("/var/lib/systemd/clock", true, min, uid, gid, 0644);
-
- ct = now(CLOCK_REALTIME);
- if (ct < min) {
- struct timespec ts;
- char date[FORMAT_TIMESTAMP_MAX];
-
- log_info("System clock time unset or jumped backwards, restoring from recorded timestamp: %s",
- 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");
- }
-
- return 0;
-}
-
-int main(int argc, char *argv[]) {
- _cleanup_(manager_freep) Manager *m = NULL;
- const char *user = "systemd-timesync";
- uid_t uid;
- gid_t gid;
- int r;
-
- log_set_target(LOG_TARGET_AUTO);
- log_set_facility(LOG_CRON);
- log_parse_environment();
- log_open();
-
- umask(0022);
-
- if (argc != 1) {
- log_error("This program does not take arguments.");
- r = -EINVAL;
- goto finish;
- }
-
- 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;
- }
-
- r = load_clock_timestamp(uid, gid);
- if (r < 0)
- goto finish;
-
- r = drop_privileges(uid, gid, (1ULL << CAP_SYS_TIME));
- if (r < 0)
- goto finish;
-
- /* We need one process for ourselves, plus one thread for the asynchronous resolver */
- if (setrlimit(RLIMIT_NPROC, &RLIMIT_MAKE_CONST(2)) < 0)
- log_warning_errno(errno, "Failed to lower RLIMIT_NPROC to 2: %m");
-
- assert_se(sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1) == 0);
-
- r = manager_new(&m);
- if (r < 0) {
- log_error_errno(r, "Failed to allocate manager: %m");
- goto finish;
- }
-
- if (clock_is_localtime() > 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.");
- m->rtc_local_time = true;
- }
-
- r = manager_parse_config_file(m);
- if (r < 0)
- log_warning_errno(r, "Failed to parse configuration file: %m");
-
- log_debug("systemd-timesyncd running as pid %lu", (unsigned long) getpid());
- sd_notify(false,
- "READY=1\n"
- "STATUS=Daemon is running");
-
- if (network_is_online()) {
- r = manager_connect(m);
- if (r < 0)
- goto finish;
- }
-
- r = sd_event_loop(m->event);
- if (r < 0) {
- log_error_errno(r, "Failed to run event loop: %m");
- goto finish;
- }
-
- /* if we got an authoritative time, store it in the file system */
- if (m->sync)
- touch("/var/lib/systemd/clock");
-
- sd_event_get_exit_code(m->event, &r);
-
-finish:
- sd_notify(false,
- "STOPPING=1\n"
- "STATUS=Shutting down...");
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
~ianmdlvl / elogind.git / blobdiff