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;
105 bool is_dstc, is_dstn;
110 /* Enforce the values of /etc/localtime */
112 fprintf(stderr, "Warning: ignoring the TZ variable, reading the system's timezone 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");
152 assert_se(strftime(a, sizeof(a), "%Z, %z", localtime_r(&sec, &tm)) > 0);
154 printf(" Timezone: %s (%s)\n"
156 "NTP synchronized: %s\n"
157 " RTC in local TZ: %s\n",
158 strna(i->timezone), a,
159 i->ntp_capable ? yes_no(i->ntp_enabled) : "n/a",
160 yes_no(i->ntp_synced),
161 yes_no(i->rtc_local));
163 r = time_get_dst(sec, "/etc/localtime",
165 &tn, &dn, &zn, &is_dstn);
167 printf(" DST active: %s\n", "n/a");
168 else if (have_time) {
169 printf(" DST active: %s\n", yes_no(is_dstc));
173 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
177 assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tc, &tm)) > 0);
179 printf(" Last DST change: DST %s at\n"
182 is_dstc ? "began" : "ended", a, b);
186 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
190 assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tn, &tm)) > 0);
192 printf(" Next DST change: DST %s (the clock jumps %s) at\n"
195 is_dstn ? "begins" : "ends", jump_str(dn, s, sizeof(s)), a, b);
200 printf(" DST active: %s\n", yes_no(is_dstc));
203 fputs("\n" ANSI_HIGHLIGHT_ON
204 "Warning: The RTC is configured to maintain time in the local timezone. This\n"
205 " mode is not fully supported and will create various problems with time\n"
206 " zone changes and daylight saving adjustments. If at all possible use\n"
207 " RTC in UTC, by calling 'timedatectl set-local-rtc 0'" ANSI_HIGHLIGHT_OFF ".\n", stdout);
210 static int show_status(sd_bus *bus, char **args, unsigned n) {
211 StatusInfo info = {};
212 static const struct bus_properties_map map[] = {
213 { "Timezone", "s", NULL, offsetof(StatusInfo, timezone) },
214 { "LocalRTC", "b", NULL, offsetof(StatusInfo, rtc_local) },
215 { "NTP", "b", NULL, offsetof(StatusInfo, ntp_enabled) },
216 { "CanNTP", "b", NULL, offsetof(StatusInfo, ntp_capable) },
217 { "NTPSynchronized", "b", NULL, offsetof(StatusInfo, ntp_synced) },
218 { "TimeUSec", "t", NULL, offsetof(StatusInfo, time) },
219 { "RTCTimeUSec", "t", NULL, offsetof(StatusInfo, rtc_time) },
226 r = bus_map_all_properties(bus,
227 "org.freedesktop.timedate1",
228 "/org/freedesktop/timedate1",
232 log_error("Failed to query server: %s", strerror(-r));
236 print_status_info(&info);
243 static int set_time(sd_bus *bus, char **args, unsigned n) {
244 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
245 bool relative = false, interactive = arg_ask_password;
252 polkit_agent_open_if_enabled();
254 r = parse_timestamp(args[1], &t);
256 log_error("Failed to parse time specification: %s", args[1]);
260 r = sd_bus_call_method(bus,
261 "org.freedesktop.timedate1",
262 "/org/freedesktop/timedate1",
263 "org.freedesktop.timedate1",
267 "xbb", (int64_t)t, relative, interactive);
269 log_error("Failed to set time: %s", bus_error_message(&error, -r));
274 static int set_timezone(sd_bus *bus, char **args, unsigned n) {
275 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
281 polkit_agent_open_if_enabled();
283 r = sd_bus_call_method(bus,
284 "org.freedesktop.timedate1",
285 "/org/freedesktop/timedate1",
286 "org.freedesktop.timedate1",
290 "sb", args[1], arg_ask_password);
292 log_error("Failed to set timezone: %s", bus_error_message(&error, -r));
297 static int set_local_rtc(sd_bus *bus, char **args, unsigned n) {
298 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
304 polkit_agent_open_if_enabled();
306 b = parse_boolean(args[1]);
308 log_error("Failed to parse local RTC setting: %s", args[1]);
312 r = sd_bus_call_method(bus,
313 "org.freedesktop.timedate1",
314 "/org/freedesktop/timedate1",
315 "org.freedesktop.timedate1",
319 "bbb", b, arg_adjust_system_clock, arg_ask_password);
321 log_error("Failed to set local RTC: %s", bus_error_message(&error, -r));
326 static int set_ntp(sd_bus *bus, char **args, unsigned n) {
327 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
333 polkit_agent_open_if_enabled();
335 b = parse_boolean(args[1]);
337 log_error("Failed to parse NTP setting: %s", args[1]);
341 r = sd_bus_call_method(bus,
342 "org.freedesktop.timedate1",
343 "/org/freedesktop/timedate1",
344 "org.freedesktop.timedate1",
348 "bb", b, arg_ask_password);
350 log_error("Failed to set ntp: %s", bus_error_message(&error, -r));
355 static int list_timezones(sd_bus *bus, char **args, unsigned n) {
356 _cleanup_fclose_ FILE *f = NULL;
357 _cleanup_strv_free_ char **zones = NULL;
363 f = fopen("/usr/share/zoneinfo/zone.tab", "re");
365 log_error("Failed to open timezone database: %m");
370 char l[LINE_MAX], *p, **z, *w;
373 if (!fgets(l, sizeof(l), f)) {
377 log_error("Failed to read timezone database: %m");
383 if (isempty(p) || *p == '#')
387 /* Skip over country code */
388 p += strcspn(p, WHITESPACE);
389 p += strspn(p, WHITESPACE);
391 /* Skip over coordinates */
392 p += strcspn(p, WHITESPACE);
393 p += strspn(p, WHITESPACE);
395 /* Found timezone name */
396 k = strcspn(p, WHITESPACE);
404 z = realloc(zones, sizeof(char*) * (n_zones + 2));
411 zones[n_zones++] = w;
415 zones[n_zones] = NULL;
417 pager_open_if_enabled();
425 static int help(void) {
427 printf("%s [OPTIONS...] COMMAND ...\n\n"
428 "Query or change system time and date settings.\n\n"
429 " -h --help Show this help\n"
430 " --version Show package version\n"
431 " --no-pager Do not pipe output into a pager\n"
432 " --no-ask-password Do not prompt for password\n"
433 " -H --host=[USER@]HOST Operate on remote host\n"
434 " -M --machine=CONTAINER Operate on local container\n"
435 " --adjust-system-clock Adjust system clock when changing local RTC mode\n\n"
437 " status Show current time settings\n"
438 " set-time TIME Set system time\n"
439 " set-timezone ZONE Set system timezone\n"
440 " list-timezones Show known timezones\n"
441 " set-local-rtc BOOL Control whether RTC is in local time\n"
442 " set-ntp BOOL Control whether NTP is enabled\n",
443 program_invocation_short_name);
448 static int parse_argv(int argc, char *argv[]) {
453 ARG_ADJUST_SYSTEM_CLOCK,
457 static const struct option options[] = {
458 { "help", no_argument, NULL, 'h' },
459 { "version", no_argument, NULL, ARG_VERSION },
460 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
461 { "host", required_argument, NULL, 'H' },
462 { "machine", required_argument, NULL, 'M' },
463 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
464 { "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK },
473 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
481 puts(PACKAGE_STRING);
482 puts(SYSTEMD_FEATURES);
486 arg_transport = BUS_TRANSPORT_REMOTE;
491 arg_transport = BUS_TRANSPORT_CONTAINER;
495 case ARG_NO_ASK_PASSWORD:
496 arg_ask_password = false;
499 case ARG_ADJUST_SYSTEM_CLOCK:
500 arg_adjust_system_clock = true;
511 assert_not_reached("Unhandled option");
518 static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) {
520 static const struct {
528 int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
530 { "status", LESS, 1, show_status },
531 { "set-time", EQUAL, 2, set_time },
532 { "set-timezone", EQUAL, 2, set_timezone },
533 { "list-timezones", EQUAL, 1, list_timezones },
534 { "set-local-rtc", EQUAL, 2, set_local_rtc },
535 { "set-ntp", EQUAL, 2, set_ntp, },
544 left = argc - optind;
547 /* Special rule: no arguments means "status" */
550 if (streq(argv[optind], "help")) {
555 for (i = 0; i < ELEMENTSOF(verbs); i++)
556 if (streq(argv[optind], verbs[i].verb))
559 if (i >= ELEMENTSOF(verbs)) {
560 log_error("Unknown operation %s", argv[optind]);
565 switch (verbs[i].argc_cmp) {
568 if (left != verbs[i].argc) {
569 log_error("Invalid number of arguments.");
576 if (left < verbs[i].argc) {
577 log_error("Too few arguments.");
584 if (left > verbs[i].argc) {
585 log_error("Too many arguments.");
592 assert_not_reached("Unknown comparison operator.");
595 return verbs[i].dispatch(bus, argv + optind, left);
598 int main(int argc, char *argv[]) {
599 _cleanup_bus_unref_ sd_bus *bus = NULL;
602 setlocale(LC_ALL, "");
603 log_parse_environment();
606 r = parse_argv(argc, argv);
610 r = bus_open_transport(arg_transport, arg_host, false, &bus);
612 log_error("Failed to create bus connection: %s", strerror(-r));
616 r = timedatectl_main(bus, argc, argv);
621 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;