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");
152 assert_se(strftime(a, sizeof(a), "%Z, %z", localtime_r(&sec, &tm)) > 0);
154 printf(" Time zone: %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);
197 printf(" DST active: %s\n", yes_no(is_dstc));
200 fputs("\n" ANSI_HIGHLIGHT_ON
201 "Warning: The RTC is configured to maintain time in the local time zone. This\n"
202 " mode is not fully supported and will create various problems with time\n"
203 " zone changes and daylight saving time adjustments. If at all possible, use\n"
204 " RTC in UTC by calling 'timedatectl set-local-rtc 0'" ANSI_HIGHLIGHT_OFF ".\n", stdout);
207 static int show_status(sd_bus *bus, char **args, unsigned n) {
208 StatusInfo info = {};
209 static const struct bus_properties_map map[] = {
210 { "Timezone", "s", NULL, offsetof(StatusInfo, timezone) },
211 { "LocalRTC", "b", NULL, offsetof(StatusInfo, rtc_local) },
212 { "NTP", "b", NULL, offsetof(StatusInfo, ntp_enabled) },
213 { "CanNTP", "b", NULL, offsetof(StatusInfo, ntp_capable) },
214 { "NTPSynchronized", "b", NULL, offsetof(StatusInfo, ntp_synced) },
215 { "TimeUSec", "t", NULL, offsetof(StatusInfo, time) },
216 { "RTCTimeUSec", "t", NULL, offsetof(StatusInfo, rtc_time) },
223 r = bus_map_all_properties(bus,
224 "org.freedesktop.timedate1",
225 "/org/freedesktop/timedate1",
229 log_error("Failed to query server: %s", strerror(-r));
233 print_status_info(&info);
240 static int set_time(sd_bus *bus, char **args, unsigned n) {
241 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
242 bool relative = false, interactive = arg_ask_password;
249 polkit_agent_open_if_enabled();
251 r = parse_timestamp(args[1], &t);
253 log_error("Failed to parse time specification: %s", args[1]);
257 r = sd_bus_call_method(bus,
258 "org.freedesktop.timedate1",
259 "/org/freedesktop/timedate1",
260 "org.freedesktop.timedate1",
264 "xbb", (int64_t)t, relative, interactive);
266 log_error("Failed to set time: %s", bus_error_message(&error, -r));
271 static int set_timezone(sd_bus *bus, char **args, unsigned n) {
272 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
278 polkit_agent_open_if_enabled();
280 r = sd_bus_call_method(bus,
281 "org.freedesktop.timedate1",
282 "/org/freedesktop/timedate1",
283 "org.freedesktop.timedate1",
287 "sb", args[1], arg_ask_password);
289 log_error("Failed to set time zone: %s", bus_error_message(&error, -r));
294 static int set_local_rtc(sd_bus *bus, char **args, unsigned n) {
295 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
301 polkit_agent_open_if_enabled();
303 b = parse_boolean(args[1]);
305 log_error("Failed to parse local RTC setting: %s", args[1]);
309 r = sd_bus_call_method(bus,
310 "org.freedesktop.timedate1",
311 "/org/freedesktop/timedate1",
312 "org.freedesktop.timedate1",
316 "bbb", b, arg_adjust_system_clock, arg_ask_password);
318 log_error("Failed to set local RTC: %s", bus_error_message(&error, -r));
323 static int set_ntp(sd_bus *bus, char **args, unsigned n) {
324 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
330 polkit_agent_open_if_enabled();
332 b = parse_boolean(args[1]);
334 log_error("Failed to parse NTP setting: %s", args[1]);
338 r = sd_bus_call_method(bus,
339 "org.freedesktop.timedate1",
340 "/org/freedesktop/timedate1",
341 "org.freedesktop.timedate1",
345 "bb", b, arg_ask_password);
347 log_error("Failed to set ntp: %s", bus_error_message(&error, -r));
352 static int list_timezones(sd_bus *bus, char **args, unsigned n) {
353 _cleanup_fclose_ FILE *f = NULL;
354 _cleanup_strv_free_ char **zones = NULL;
360 f = fopen("/usr/share/zoneinfo/zone.tab", "re");
362 log_error("Failed to open time zone database: %m");
367 char l[LINE_MAX], *p, **z, *w;
370 if (!fgets(l, sizeof(l), f)) {
374 log_error("Failed to read time zone database: %m");
380 if (isempty(p) || *p == '#')
383 /* Skip over country code */
384 p += strcspn(p, WHITESPACE);
385 p += strspn(p, WHITESPACE);
387 /* Skip over coordinates */
388 p += strcspn(p, WHITESPACE);
389 p += strspn(p, WHITESPACE);
391 /* Found timezone name */
392 k = strcspn(p, WHITESPACE);
400 z = realloc(zones, sizeof(char*) * (n_zones + 2));
407 zones[n_zones++] = w;
411 zones[n_zones] = NULL;
413 pager_open_if_enabled();
421 static int help(void) {
423 printf("%s [OPTIONS...] COMMAND ...\n\n"
424 "Query or change system time and date settings.\n\n"
425 " -h --help Show this help message\n"
426 " --version Show package version\n"
427 " --no-pager Do not pipe output into a pager\n"
428 " --no-ask-password Do not prompt for password\n"
429 " -H --host=[USER@]HOST Operate on remote host\n"
430 " -M --machine=CONTAINER Operate on local container\n"
431 " --adjust-system-clock Adjust system clock when changing local RTC mode\n\n"
433 " status Show current time settings\n"
434 " set-time TIME Set system time\n"
435 " set-timezone ZONE Set system time zone\n"
436 " list-timezones Show known time zones\n"
437 " set-local-rtc BOOL Control whether RTC is in local time\n"
438 " set-ntp BOOL Control whether NTP is enabled\n",
439 program_invocation_short_name);
444 static int parse_argv(int argc, char *argv[]) {
449 ARG_ADJUST_SYSTEM_CLOCK,
453 static const struct option options[] = {
454 { "help", no_argument, NULL, 'h' },
455 { "version", no_argument, NULL, ARG_VERSION },
456 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
457 { "host", required_argument, NULL, 'H' },
458 { "machine", required_argument, NULL, 'M' },
459 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
460 { "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK },
469 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
477 puts(PACKAGE_STRING);
478 puts(SYSTEMD_FEATURES);
482 arg_transport = BUS_TRANSPORT_REMOTE;
487 arg_transport = BUS_TRANSPORT_CONTAINER;
491 case ARG_NO_ASK_PASSWORD:
492 arg_ask_password = false;
495 case ARG_ADJUST_SYSTEM_CLOCK:
496 arg_adjust_system_clock = true;
507 assert_not_reached("Unhandled option");
514 static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) {
516 static const struct {
524 int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
526 { "status", LESS, 1, show_status },
527 { "set-time", EQUAL, 2, set_time },
528 { "set-timezone", EQUAL, 2, set_timezone },
529 { "list-timezones", EQUAL, 1, list_timezones },
530 { "set-local-rtc", EQUAL, 2, set_local_rtc },
531 { "set-ntp", EQUAL, 2, set_ntp, },
540 left = argc - optind;
543 /* Special rule: no arguments means "status" */
546 if (streq(argv[optind], "help")) {
551 for (i = 0; i < ELEMENTSOF(verbs); i++)
552 if (streq(argv[optind], verbs[i].verb))
555 if (i >= ELEMENTSOF(verbs)) {
556 log_error("Unknown operation %s", argv[optind]);
561 switch (verbs[i].argc_cmp) {
564 if (left != verbs[i].argc) {
565 log_error("Invalid number of arguments.");
572 if (left < verbs[i].argc) {
573 log_error("Too few arguments.");
580 if (left > verbs[i].argc) {
581 log_error("Too many arguments.");
588 assert_not_reached("Unknown comparison operator.");
591 return verbs[i].dispatch(bus, argv + optind, left);
594 int main(int argc, char *argv[]) {
595 _cleanup_bus_unref_ sd_bus *bus = NULL;
598 setlocale(LC_ALL, "");
599 log_parse_environment();
602 r = parse_argv(argc, argv);
606 r = bus_open_transport(arg_transport, arg_host, false, &bus);
608 log_error("Failed to create bus connection: %s", strerror(-r));
612 r = timedatectl_main(bus, argc, argv);
617 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;