1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2012 Lennart Poettering
7 Copyright 2013 Kay Sievers
9 systemd is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as published by
11 the Free Software Foundation; either version 2.1 of the License, or
12 (at your option) any later version.
14 systemd is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public License
20 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include <sys/timex.h>
33 #include "bus-error.h"
35 #include "spawn-polkit-agent.h"
41 static bool arg_no_pager = false;
42 static bool arg_ask_password = true;
43 static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
44 static char *arg_host = NULL;
45 static bool arg_adjust_system_clock = false;
47 static void pager_open_if_enabled(void) {
55 static void polkit_agent_open_if_enabled(void) {
57 /* Open the polkit agent as a child process if necessary */
58 if (!arg_ask_password)
61 if (arg_transport != BUS_TRANSPORT_LOCAL)
67 typedef struct StatusInfo {
79 static const char *jump_str(int delta_minutes, char *s, size_t size) {
80 if (delta_minutes == 60)
81 return "one hour forward";
82 if (delta_minutes == -60)
83 return "one hour backwards";
84 if (delta_minutes < 0) {
85 snprintf(s, size, "%i minutes backwards", -delta_minutes);
88 if (delta_minutes > 0) {
89 snprintf(s, size, "%i minutes forward", delta_minutes);
95 static void print_status_info(const StatusInfo *i) {
96 char a[FORMAT_TIMESTAMP_MAX];
97 char b[FORMAT_TIMESTAMP_MAX];
101 bool have_time = false;
102 _cleanup_free_ char *zc = NULL, *zn = NULL;
105 bool is_dstc = false, is_dstn = false;
110 /* Enforce the values of /etc/localtime */
112 fprintf(stderr, "Warning: Ignoring the TZ variable. Reading the system's time zone setting only.\n\n");
117 sec = (time_t) (i->time / USEC_PER_SEC);
119 } else if (arg_transport == BUS_TRANSPORT_LOCAL) {
123 fprintf(stderr, "Warning: Could not get time from timedated and not operating locally.\n\n");
127 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) > 0);
129 printf(" Local time: %s\n", a);
132 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S UTC", gmtime_r(&sec, &tm)) > 0);
134 printf(" Universal time: %s\n", a);
136 printf(" Local time: %s\n", "n/a");
137 printf(" Universal time: %s\n", "n/a");
140 if (i->rtc_time > 0) {
143 rtc_sec = (time_t)(i->rtc_time / USEC_PER_SEC);
145 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S", gmtime_r(&rtc_sec, &tm)) > 0);
147 printf(" RTC time: %s\n", a);
149 printf(" RTC time: %s\n", "n/a");
153 assert_se(strftime(a, sizeof(a), "%Z, %z", localtime_r(&sec, &tm)) > 0);
157 printf(" Time zone: %s (%s)\n"
159 "NTP synchronized: %s\n"
160 " RTC in local TZ: %s\n",
161 strna(i->timezone), have_time ? a : "n/a",
162 i->ntp_capable ? yes_no(i->ntp_enabled) : "n/a",
163 yes_no(i->ntp_synced),
164 yes_no(i->rtc_local));
167 r = time_get_dst(sec, "/etc/localtime",
169 &tn, &dn, &zn, &is_dstn);
171 printf(" DST active: %s\n", "n/a");
173 printf(" DST active: %s\n", yes_no(is_dstc));
177 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
181 assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tc, &tm)) > 0);
183 printf(" Last DST change: DST %s at\n"
186 is_dstc ? "began" : "ended", a, b);
190 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
194 assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tn, &tm)) > 0);
196 printf(" Next DST change: DST %s (the clock jumps %s) at\n"
199 is_dstn ? "begins" : "ends", jump_str(dn, s, sizeof(s)), a, b);
202 printf(" DST active: %s\n", yes_no(is_dstc));
205 fputs("\n" ANSI_HIGHLIGHT_ON
206 "Warning: The RTC is configured to maintain time in the local time zone. This\n"
207 " mode is not fully supported and will create various problems with time\n"
208 " zone changes and daylight saving time adjustments. If at all possible, use\n"
209 " RTC in UTC by calling 'timedatectl set-local-rtc 0'" ANSI_HIGHLIGHT_OFF ".\n", stdout);
212 static int show_status(sd_bus *bus, char **args, unsigned n) {
213 StatusInfo info = {};
214 static const struct bus_properties_map map[] = {
215 { "Timezone", "s", NULL, offsetof(StatusInfo, timezone) },
216 { "LocalRTC", "b", NULL, offsetof(StatusInfo, rtc_local) },
217 { "NTP", "b", NULL, offsetof(StatusInfo, ntp_enabled) },
218 { "CanNTP", "b", NULL, offsetof(StatusInfo, ntp_capable) },
219 { "NTPSynchronized", "b", NULL, offsetof(StatusInfo, ntp_synced) },
220 { "TimeUSec", "t", NULL, offsetof(StatusInfo, time) },
221 { "RTCTimeUSec", "t", NULL, offsetof(StatusInfo, rtc_time) },
228 r = bus_map_all_properties(bus,
229 "org.freedesktop.timedate1",
230 "/org/freedesktop/timedate1",
234 log_error("Failed to query server: %s", strerror(-r));
238 print_status_info(&info);
245 static int set_time(sd_bus *bus, char **args, unsigned n) {
246 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
247 bool relative = false, interactive = arg_ask_password;
254 polkit_agent_open_if_enabled();
256 r = parse_timestamp(args[1], &t);
258 log_error("Failed to parse time specification: %s", args[1]);
262 r = sd_bus_call_method(bus,
263 "org.freedesktop.timedate1",
264 "/org/freedesktop/timedate1",
265 "org.freedesktop.timedate1",
269 "xbb", (int64_t)t, relative, interactive);
271 log_error("Failed to set time: %s", bus_error_message(&error, -r));
276 static int set_timezone(sd_bus *bus, char **args, unsigned n) {
277 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
283 polkit_agent_open_if_enabled();
285 r = sd_bus_call_method(bus,
286 "org.freedesktop.timedate1",
287 "/org/freedesktop/timedate1",
288 "org.freedesktop.timedate1",
292 "sb", args[1], arg_ask_password);
294 log_error("Failed to set time zone: %s", bus_error_message(&error, -r));
299 static int set_local_rtc(sd_bus *bus, char **args, unsigned n) {
300 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
306 polkit_agent_open_if_enabled();
308 b = parse_boolean(args[1]);
310 log_error("Failed to parse local RTC setting: %s", args[1]);
314 r = sd_bus_call_method(bus,
315 "org.freedesktop.timedate1",
316 "/org/freedesktop/timedate1",
317 "org.freedesktop.timedate1",
321 "bbb", b, arg_adjust_system_clock, arg_ask_password);
323 log_error("Failed to set local RTC: %s", bus_error_message(&error, -r));
328 static int set_ntp(sd_bus *bus, char **args, unsigned n) {
329 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
335 polkit_agent_open_if_enabled();
337 b = parse_boolean(args[1]);
339 log_error("Failed to parse NTP setting: %s", args[1]);
343 r = sd_bus_call_method(bus,
344 "org.freedesktop.timedate1",
345 "/org/freedesktop/timedate1",
346 "org.freedesktop.timedate1",
350 "bb", b, arg_ask_password);
352 log_error("Failed to set ntp: %s", bus_error_message(&error, -r));
357 static int list_timezones(sd_bus *bus, char **args, unsigned n) {
358 _cleanup_strv_free_ char **zones = NULL;
364 r = get_timezones(&zones);
366 log_error("Failed to read list of time zones: %s", strerror(-r));
370 pager_open_if_enabled();
376 static int help(void) {
378 printf("%s [OPTIONS...] COMMAND ...\n\n"
379 "Query or change system time and date settings.\n\n"
380 " -h --help Show this help message\n"
381 " --version Show package version\n"
382 " --no-pager Do not pipe output into a pager\n"
383 " --no-ask-password Do not prompt for password\n"
384 " -H --host=[USER@]HOST Operate on remote host\n"
385 " -M --machine=CONTAINER Operate on local container\n"
386 " --adjust-system-clock Adjust system clock when changing local RTC mode\n\n"
388 " status Show current time settings\n"
389 " set-time TIME Set system time\n"
390 " set-timezone ZONE Set system time zone\n"
391 " list-timezones Show known time zones\n"
392 " set-local-rtc BOOL Control whether RTC is in local time\n"
393 " set-ntp BOOL Control whether NTP is enabled\n",
394 program_invocation_short_name);
399 static int parse_argv(int argc, char *argv[]) {
404 ARG_ADJUST_SYSTEM_CLOCK,
408 static const struct option options[] = {
409 { "help", no_argument, NULL, 'h' },
410 { "version", no_argument, NULL, ARG_VERSION },
411 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
412 { "host", required_argument, NULL, 'H' },
413 { "machine", required_argument, NULL, 'M' },
414 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
415 { "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK },
424 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
432 puts(PACKAGE_STRING);
433 puts(SYSTEMD_FEATURES);
437 arg_transport = BUS_TRANSPORT_REMOTE;
442 arg_transport = BUS_TRANSPORT_CONTAINER;
446 case ARG_NO_ASK_PASSWORD:
447 arg_ask_password = false;
450 case ARG_ADJUST_SYSTEM_CLOCK:
451 arg_adjust_system_clock = true;
462 assert_not_reached("Unhandled option");
469 static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) {
471 static const struct {
479 int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
481 { "status", LESS, 1, show_status },
482 { "set-time", EQUAL, 2, set_time },
483 { "set-timezone", EQUAL, 2, set_timezone },
484 { "list-timezones", EQUAL, 1, list_timezones },
485 { "set-local-rtc", EQUAL, 2, set_local_rtc },
486 { "set-ntp", EQUAL, 2, set_ntp, },
495 left = argc - optind;
498 /* Special rule: no arguments means "status" */
501 if (streq(argv[optind], "help")) {
506 for (i = 0; i < ELEMENTSOF(verbs); i++)
507 if (streq(argv[optind], verbs[i].verb))
510 if (i >= ELEMENTSOF(verbs)) {
511 log_error("Unknown operation %s", argv[optind]);
516 switch (verbs[i].argc_cmp) {
519 if (left != verbs[i].argc) {
520 log_error("Invalid number of arguments.");
527 if (left < verbs[i].argc) {
528 log_error("Too few arguments.");
535 if (left > verbs[i].argc) {
536 log_error("Too many arguments.");
543 assert_not_reached("Unknown comparison operator.");
546 return verbs[i].dispatch(bus, argv + optind, left);
549 int main(int argc, char *argv[]) {
550 _cleanup_bus_unref_ sd_bus *bus = NULL;
553 setlocale(LC_ALL, "");
554 log_parse_environment();
557 r = parse_argv(argc, argv);
561 r = bus_open_transport(arg_transport, arg_host, false, &bus);
563 log_error("Failed to create bus connection: %s", strerror(-r));
567 r = timedatectl_main(bus, argc, argv);
572 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;