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_fclose_ FILE *f = NULL;
359 _cleanup_strv_free_ char **zones = NULL;
365 f = fopen("/usr/share/zoneinfo/zone.tab", "re");
367 log_error("Failed to open time zone database: %m");
372 char l[LINE_MAX], *p, **z, *w;
375 if (!fgets(l, sizeof(l), f)) {
379 log_error("Failed to read time zone database: %m");
385 if (isempty(p) || *p == '#')
388 /* Skip over country code */
389 p += strcspn(p, WHITESPACE);
390 p += strspn(p, WHITESPACE);
392 /* Skip over coordinates */
393 p += strcspn(p, WHITESPACE);
394 p += strspn(p, WHITESPACE);
396 /* Found timezone name */
397 k = strcspn(p, WHITESPACE);
405 z = realloc(zones, sizeof(char*) * (n_zones + 2));
412 zones[n_zones++] = w;
416 zones[n_zones] = NULL;
418 pager_open_if_enabled();
426 static int help(void) {
428 printf("%s [OPTIONS...] COMMAND ...\n\n"
429 "Query or change system time and date settings.\n\n"
430 " -h --help Show this help message\n"
431 " --version Show package version\n"
432 " --no-pager Do not pipe output into a pager\n"
433 " --no-ask-password Do not prompt for password\n"
434 " -H --host=[USER@]HOST Operate on remote host\n"
435 " -M --machine=CONTAINER Operate on local container\n"
436 " --adjust-system-clock Adjust system clock when changing local RTC mode\n\n"
438 " status Show current time settings\n"
439 " set-time TIME Set system time\n"
440 " set-timezone ZONE Set system time zone\n"
441 " list-timezones Show known time zones\n"
442 " set-local-rtc BOOL Control whether RTC is in local time\n"
443 " set-ntp BOOL Control whether NTP is enabled\n",
444 program_invocation_short_name);
449 static int parse_argv(int argc, char *argv[]) {
454 ARG_ADJUST_SYSTEM_CLOCK,
458 static const struct option options[] = {
459 { "help", no_argument, NULL, 'h' },
460 { "version", no_argument, NULL, ARG_VERSION },
461 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
462 { "host", required_argument, NULL, 'H' },
463 { "machine", required_argument, NULL, 'M' },
464 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
465 { "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK },
474 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
482 puts(PACKAGE_STRING);
483 puts(SYSTEMD_FEATURES);
487 arg_transport = BUS_TRANSPORT_REMOTE;
492 arg_transport = BUS_TRANSPORT_CONTAINER;
496 case ARG_NO_ASK_PASSWORD:
497 arg_ask_password = false;
500 case ARG_ADJUST_SYSTEM_CLOCK:
501 arg_adjust_system_clock = true;
512 assert_not_reached("Unhandled option");
519 static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) {
521 static const struct {
529 int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
531 { "status", LESS, 1, show_status },
532 { "set-time", EQUAL, 2, set_time },
533 { "set-timezone", EQUAL, 2, set_timezone },
534 { "list-timezones", EQUAL, 1, list_timezones },
535 { "set-local-rtc", EQUAL, 2, set_local_rtc },
536 { "set-ntp", EQUAL, 2, set_ntp, },
545 left = argc - optind;
548 /* Special rule: no arguments means "status" */
551 if (streq(argv[optind], "help")) {
556 for (i = 0; i < ELEMENTSOF(verbs); i++)
557 if (streq(argv[optind], verbs[i].verb))
560 if (i >= ELEMENTSOF(verbs)) {
561 log_error("Unknown operation %s", argv[optind]);
566 switch (verbs[i].argc_cmp) {
569 if (left != verbs[i].argc) {
570 log_error("Invalid number of arguments.");
577 if (left < verbs[i].argc) {
578 log_error("Too few arguments.");
585 if (left > verbs[i].argc) {
586 log_error("Too many arguments.");
593 assert_not_reached("Unknown comparison operator.");
596 return verbs[i].dispatch(bus, argv + optind, left);
599 int main(int argc, char *argv[]) {
600 _cleanup_bus_unref_ sd_bus *bus = NULL;
603 setlocale(LC_ALL, "");
604 log_parse_environment();
607 r = parse_argv(argc, argv);
611 r = bus_open_transport(arg_transport, arg_host, false, &bus);
613 log_error("Failed to create bus connection: %s", strerror(-r));
617 r = timedatectl_main(bus, argc, argv);
622 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;