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Diffstat (limited to 'src/systemd-timedate/timedatectl.c')
-rw-r--r--src/systemd-timedate/timedatectl.c514
1 files changed, 514 insertions, 0 deletions
diff --git a/src/systemd-timedate/timedatectl.c b/src/systemd-timedate/timedatectl.c
new file mode 100644
index 0000000000..28546a0ad1
--- /dev/null
+++ b/src/systemd-timedate/timedatectl.c
@@ -0,0 +1,514 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+ Copyright 2013 Kay Sievers
+
+ 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 <getopt.h>
+#include <locale.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <systemd/sd-bus.h>
+
+#include "bus-error.h"
+#include "bus-util.h"
+#include "pager.h"
+#include "parse-util.h"
+#include "spawn-polkit-agent.h"
+#include "strv.h"
+#include "terminal-util.h"
+#include "util.h"
+
+static bool arg_no_pager = false;
+static bool arg_ask_password = true;
+static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
+static char *arg_host = NULL;
+static bool arg_adjust_system_clock = false;
+
+static void pager_open_if_enabled(void) {
+
+ if (arg_no_pager)
+ return;
+
+ pager_open(false);
+}
+
+static void polkit_agent_open_if_enabled(void) {
+
+ /* Open the polkit agent as a child process if necessary */
+ if (!arg_ask_password)
+ return;
+
+ if (arg_transport != BUS_TRANSPORT_LOCAL)
+ return;
+
+ polkit_agent_open();
+}
+
+typedef struct StatusInfo {
+ usec_t time;
+ char *timezone;
+
+ usec_t rtc_time;
+ bool rtc_local;
+
+ bool ntp_enabled;
+ bool ntp_capable;
+ bool ntp_synced;
+} StatusInfo;
+
+static void status_info_clear(StatusInfo *info) {
+ if (info) {
+ free(info->timezone);
+ zero(*info);
+ }
+}
+
+static void print_status_info(const StatusInfo *i) {
+ char a[FORMAT_TIMESTAMP_MAX];
+ struct tm tm;
+ time_t sec;
+ bool have_time = false;
+ const char *old_tz = NULL, *tz;
+ int r;
+
+ assert(i);
+
+ /* Save the old $TZ */
+ tz = getenv("TZ");
+ if (tz)
+ old_tz = strdupa(tz);
+
+ /* Set the new $TZ */
+ if (setenv("TZ", isempty(i->timezone) ? "UTC" : i->timezone, true) < 0)
+ log_warning_errno(errno, "Failed to set TZ environment variable, ignoring: %m");
+ else
+ tzset();
+
+ if (i->time != 0) {
+ sec = (time_t) (i->time / USEC_PER_SEC);
+ have_time = true;
+ } else if (IN_SET(arg_transport, BUS_TRANSPORT_LOCAL, BUS_TRANSPORT_MACHINE)) {
+ sec = time(NULL);
+ have_time = true;
+ } else
+ log_warning("Could not get time from timedated and not operating locally, ignoring.");
+
+ if (have_time) {
+ xstrftime(a, "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm));
+ printf(" Local time: %.*s\n", (int) sizeof(a), a);
+
+ xstrftime(a, "%a %Y-%m-%d %H:%M:%S UTC", gmtime_r(&sec, &tm));
+ printf(" Universal time: %.*s\n", (int) sizeof(a), a);
+ } else {
+ printf(" Local time: %s\n", "n/a");
+ printf(" Universal time: %s\n", "n/a");
+ }
+
+ if (i->rtc_time > 0) {
+ time_t rtc_sec;
+
+ rtc_sec = (time_t) (i->rtc_time / USEC_PER_SEC);
+ xstrftime(a, "%a %Y-%m-%d %H:%M:%S", gmtime_r(&rtc_sec, &tm));
+ printf(" RTC time: %.*s\n", (int) sizeof(a), a);
+ } else
+ printf(" RTC time: %s\n", "n/a");
+
+ if (have_time)
+ xstrftime(a, "%Z, %z", localtime_r(&sec, &tm));
+
+ /* Restore the $TZ */
+ if (old_tz)
+ r = setenv("TZ", old_tz, true);
+ else
+ r = unsetenv("TZ");
+ if (r < 0)
+ log_warning_errno(errno, "Failed to set TZ environment variable, ignoring: %m");
+ else
+ tzset();
+
+ printf(" Time zone: %s (%.*s)\n"
+ " Network time on: %s\n"
+ "NTP synchronized: %s\n"
+ " RTC in local TZ: %s\n",
+ strna(i->timezone), (int) sizeof(a), have_time ? a : "n/a",
+ i->ntp_capable ? yes_no(i->ntp_enabled) : "n/a",
+ yes_no(i->ntp_synced),
+ yes_no(i->rtc_local));
+
+ if (i->rtc_local)
+ fputs("\n" ANSI_HIGHLIGHT
+ "Warning: The system is configured to read the RTC time in the local time zone.\n"
+ " This mode can not be fully supported. It will create various problems\n"
+ " with time zone changes and daylight saving time adjustments. The RTC\n"
+ " time is never updated, it relies on external facilities to maintain it.\n"
+ " If at all possible, use RTC in UTC by calling\n"
+ " 'timedatectl set-local-rtc 0'." ANSI_NORMAL "\n", stdout);
+}
+
+static int show_status(sd_bus *bus, char **args, unsigned n) {
+ _cleanup_(status_info_clear) StatusInfo info = {};
+ static const struct bus_properties_map map[] = {
+ { "Timezone", "s", NULL, offsetof(StatusInfo, timezone) },
+ { "LocalRTC", "b", NULL, offsetof(StatusInfo, rtc_local) },
+ { "NTP", "b", NULL, offsetof(StatusInfo, ntp_enabled) },
+ { "CanNTP", "b", NULL, offsetof(StatusInfo, ntp_capable) },
+ { "NTPSynchronized", "b", NULL, offsetof(StatusInfo, ntp_synced) },
+ { "TimeUSec", "t", NULL, offsetof(StatusInfo, time) },
+ { "RTCTimeUSec", "t", NULL, offsetof(StatusInfo, rtc_time) },
+ {}
+ };
+ int r;
+
+ assert(bus);
+
+ r = bus_map_all_properties(bus,
+ "org.freedesktop.timedate1",
+ "/org/freedesktop/timedate1",
+ map,
+ &info);
+ if (r < 0)
+ return log_error_errno(r, "Failed to query server: %m");
+
+ print_status_info(&info);
+
+ return r;
+}
+
+static int set_time(sd_bus *bus, char **args, unsigned n) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ bool relative = false, interactive = arg_ask_password;
+ usec_t t;
+ int r;
+
+ assert(args);
+ assert(n == 2);
+
+ polkit_agent_open_if_enabled();
+
+ r = parse_timestamp(args[1], &t);
+ if (r < 0) {
+ log_error("Failed to parse time specification: %s", args[1]);
+ return r;
+ }
+
+ r = sd_bus_call_method(bus,
+ "org.freedesktop.timedate1",
+ "/org/freedesktop/timedate1",
+ "org.freedesktop.timedate1",
+ "SetTime",
+ &error,
+ NULL,
+ "xbb", (int64_t)t, relative, interactive);
+ if (r < 0)
+ log_error("Failed to set time: %s", bus_error_message(&error, -r));
+
+ return r;
+}
+
+static int set_timezone(sd_bus *bus, char **args, unsigned n) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r;
+
+ assert(args);
+ assert(n == 2);
+
+ polkit_agent_open_if_enabled();
+
+ r = sd_bus_call_method(bus,
+ "org.freedesktop.timedate1",
+ "/org/freedesktop/timedate1",
+ "org.freedesktop.timedate1",
+ "SetTimezone",
+ &error,
+ NULL,
+ "sb", args[1], arg_ask_password);
+ if (r < 0)
+ log_error("Failed to set time zone: %s", bus_error_message(&error, -r));
+
+ return r;
+}
+
+static int set_local_rtc(sd_bus *bus, char **args, unsigned n) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ int r, b;
+
+ assert(args);
+ assert(n == 2);
+
+ polkit_agent_open_if_enabled();
+
+ b = parse_boolean(args[1]);
+ if (b < 0) {
+ log_error("Failed to parse local RTC setting: %s", args[1]);
+ return b;
+ }
+
+ r = sd_bus_call_method(bus,
+ "org.freedesktop.timedate1",
+ "/org/freedesktop/timedate1",
+ "org.freedesktop.timedate1",
+ "SetLocalRTC",
+ &error,
+ NULL,
+ "bbb", b, arg_adjust_system_clock, arg_ask_password);
+ if (r < 0)
+ log_error("Failed to set local RTC: %s", bus_error_message(&error, -r));
+
+ return r;
+}
+
+static int set_ntp(sd_bus *bus, char **args, unsigned n) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ int b, r;
+
+ assert(args);
+ assert(n == 2);
+
+ polkit_agent_open_if_enabled();
+
+ b = parse_boolean(args[1]);
+ if (b < 0) {
+ log_error("Failed to parse NTP setting: %s", args[1]);
+ return b;
+ }
+
+ r = sd_bus_call_method(bus,
+ "org.freedesktop.timedate1",
+ "/org/freedesktop/timedate1",
+ "org.freedesktop.timedate1",
+ "SetNTP",
+ &error,
+ NULL,
+ "bb", b, arg_ask_password);
+ if (r < 0)
+ log_error("Failed to set ntp: %s", bus_error_message(&error, -r));
+
+ return r;
+}
+
+static int list_timezones(sd_bus *bus, char **args, unsigned n) {
+ _cleanup_strv_free_ char **zones = NULL;
+ int r;
+
+ assert(args);
+ assert(n == 1);
+
+ r = get_timezones(&zones);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read list of time zones: %m");
+
+ pager_open_if_enabled();
+ strv_print(zones);
+
+ return 0;
+}
+
+static void help(void) {
+ printf("%s [OPTIONS...] COMMAND ...\n\n"
+ "Query or change system time and date settings.\n\n"
+ " -h --help Show this help message\n"
+ " --version Show package version\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " --no-ask-password Do not prompt for password\n"
+ " -H --host=[USER@]HOST Operate on remote host\n"
+ " -M --machine=CONTAINER Operate on local container\n"
+ " --adjust-system-clock Adjust system clock when changing local RTC mode\n\n"
+ "Commands:\n"
+ " status Show current time settings\n"
+ " set-time TIME Set system time\n"
+ " set-timezone ZONE Set system time zone\n"
+ " list-timezones Show known time zones\n"
+ " set-local-rtc BOOL Control whether RTC is in local time\n"
+ " set-ntp BOOL Enable or disable network time synchronization\n",
+ program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_PAGER,
+ ARG_ADJUST_SYSTEM_CLOCK,
+ ARG_NO_ASK_PASSWORD
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "host", required_argument, NULL, 'H' },
+ { "machine", required_argument, NULL, 'M' },
+ { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
+ { "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ return version();
+
+ case 'H':
+ arg_transport = BUS_TRANSPORT_REMOTE;
+ arg_host = optarg;
+ break;
+
+ case 'M':
+ arg_transport = BUS_TRANSPORT_MACHINE;
+ arg_host = optarg;
+ break;
+
+ case ARG_NO_ASK_PASSWORD:
+ arg_ask_password = false;
+ break;
+
+ case ARG_ADJUST_SYSTEM_CLOCK:
+ arg_adjust_system_clock = true;
+ break;
+
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ return 1;
+}
+
+static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) {
+
+ static const struct {
+ const char* verb;
+ const enum {
+ MORE,
+ LESS,
+ EQUAL
+ } argc_cmp;
+ const int argc;
+ int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
+ } verbs[] = {
+ { "status", LESS, 1, show_status },
+ { "set-time", EQUAL, 2, set_time },
+ { "set-timezone", EQUAL, 2, set_timezone },
+ { "list-timezones", EQUAL, 1, list_timezones },
+ { "set-local-rtc", EQUAL, 2, set_local_rtc },
+ { "set-ntp", EQUAL, 2, set_ntp, },
+ };
+
+ int left;
+ unsigned i;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ left = argc - optind;
+
+ if (left <= 0)
+ /* Special rule: no arguments means "status" */
+ i = 0;
+ else {
+ if (streq(argv[optind], "help")) {
+ help();
+ return 0;
+ }
+
+ for (i = 0; i < ELEMENTSOF(verbs); i++)
+ if (streq(argv[optind], verbs[i].verb))
+ break;
+
+ if (i >= ELEMENTSOF(verbs)) {
+ log_error("Unknown operation %s", argv[optind]);
+ return -EINVAL;
+ }
+ }
+
+ switch (verbs[i].argc_cmp) {
+
+ case EQUAL:
+ if (left != verbs[i].argc) {
+ log_error("Invalid number of arguments.");
+ return -EINVAL;
+ }
+
+ break;
+
+ case MORE:
+ if (left < verbs[i].argc) {
+ log_error("Too few arguments.");
+ return -EINVAL;
+ }
+
+ break;
+
+ case LESS:
+ if (left > verbs[i].argc) {
+ log_error("Too many arguments.");
+ return -EINVAL;
+ }
+
+ break;
+
+ default:
+ assert_not_reached("Unknown comparison operator.");
+ }
+
+ return verbs[i].dispatch(bus, argv + optind, left);
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+ int r;
+
+ setlocale(LC_ALL, "");
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ r = bus_connect_transport(arg_transport, arg_host, false, &bus);
+ if (r < 0) {
+ log_error_errno(r, "Failed to create bus connection: %m");
+ goto finish;
+ }
+
+ r = timedatectl_main(bus, argc, argv);
+
+finish:
+ pager_close();
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-01 03:50:08 +0000