./tools/notsd-move

1 files changed, 165 insertions, 0 deletions

diff --git a/src/systemd-timesyncd/timesyncd.c b/src/systemd-timesyncd/timesyncd.c
new file mode 100644
index 0000000000..047f455d18
--- /dev/null
+++ b/src/systemd-timesyncd/timesyncd.c
@@ -0,0 +1,165 @@
+/***
+  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 <systemd/sd-daemon.h>
+#include <systemd/sd-event.h>
+
+#include "sd-network/network-util.h"
+#include "systemd-basic/capability-util.h"
+#include "systemd-basic/clock-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fs-util.h"
+#include "systemd-basic/signal-util.h"
+#include "systemd-basic/user-util.h"
+
+#include "timesyncd-conf.h"
+#include "timesyncd-manager.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 */
+                (void) fchmod(fd, 0644);
+                (void) fchown(fd, uid, gid);
+
+        } else
+                /* create stamp file with the compiled-in date */
+                (void) 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;
+
+        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 (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.");
+                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 " PID_FMT, 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)
+                (void) 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;
+}