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)
64 typedef struct StatusInfo {
76 static const char *jump_str(int delta_minutes, char *s, size_t size) {
77 if (delta_minutes == 60)
78 return "one hour forward";
79 if (delta_minutes == -60)
80 return "one hour backwards";
81 if (delta_minutes < 0) {
82 snprintf(s, size, "%i minutes backwards", -delta_minutes);
85 if (delta_minutes > 0) {
86 snprintf(s, size, "%i minutes forward", delta_minutes);
92 static void print_status_info(const StatusInfo *i) {
93 char a[FORMAT_TIMESTAMP_MAX];
94 char b[FORMAT_TIMESTAMP_MAX];
101 bool is_dstc, is_dstn;
106 /* Enforce the values of /etc/localtime */
108 fprintf(stderr, "Warning: ignoring the TZ variable, reading the system's timezone setting only.\n\n");
112 sec = (time_t) (i->time / USEC_PER_SEC);
115 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) > 0);
117 printf(" Local time: %s\n", a);
120 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S UTC", gmtime_r(&sec, &tm)) > 0);
122 printf(" Universal time: %s\n", a);
124 if (i->rtc_time > 0) {
127 rtc_sec = (time_t)(i->rtc_time / USEC_PER_SEC);
129 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S", gmtime_r(&rtc_sec, &tm)) > 0);
131 printf(" RTC time: %s\n", a);
133 printf(" RTC time: n/a\n");
136 assert_se(strftime(a, sizeof(a), "%Z, %z", localtime_r(&sec, &tm)) > 0);
138 printf(" Timezone: %s (%s)\n"
140 "NTP synchronized: %s\n"
141 " RTC in local TZ: %s\n",
142 strna(i->timezone), a,
143 i->ntp_capable ? yes_no(i->ntp_enabled) : "n/a",
144 yes_no(i->ntp_synced),
145 yes_no(i->rtc_local));
147 r = time_get_dst(sec, "/etc/localtime",
149 &tn, &dn, &zn, &is_dstn);
151 printf(" DST active: n/a\n");
153 printf(" DST active: %s\n", yes_no(is_dstc));
157 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
161 assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tc, &tm)) > 0);
163 printf(" Last DST change: DST %s at\n"
166 is_dstc ? "began" : "ended", a, b);
170 assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
174 assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tn, &tm)) > 0);
176 printf(" Next DST change: DST %s (the clock jumps %s) at\n"
179 is_dstn ? "begins" : "ends", jump_str(dn, s, sizeof(s)), a, b);
186 fputs("\n" ANSI_HIGHLIGHT_ON
187 "Warning: The RTC is configured to maintain time in the local timezone. This\n"
188 " mode is not fully supported and will create various problems with time\n"
189 " zone changes and daylight saving adjustments. If at all possible use\n"
190 " RTC in UTC, by calling 'timedatectl set-local-rtc 0'" ANSI_HIGHLIGHT_OFF ".\n", stdout);
193 static int show_status(sd_bus *bus, char **args, unsigned n) {
194 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
195 StatusInfo info = {};
196 const struct bus_properties_map map[] = {
197 { "s", "Timezone", &info.timezone },
198 { "b", "LocalRTC", &info.rtc_local },
199 { "b", "NTP", &info.ntp_enabled },
200 { "b", "CanNTP", &info.ntp_capable },
201 { "b", "NTPSynchronized", &info.ntp_synced},
202 { "t", "TimeUSec", &info.time },
203 { "t", "RTCTimeUSec", &info.rtc_time },
210 r = bus_map_all_properties(bus,
211 "org.freedesktop.timedate1",
212 "/org/freedesktop/timedate1",
217 print_status_info(&info);
224 static int set_time(sd_bus *bus, char **args, unsigned n) {
225 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
226 bool relative = false, interactive = arg_ask_password;
233 polkit_agent_open_if_enabled();
235 r = parse_timestamp(args[1], &t);
237 log_error("Failed to parse time specification: %s", args[1]);
241 r = sd_bus_call_method(bus,
242 "org.freedesktop.timedate1",
243 "/org/freedesktop/timedate1",
244 "org.freedesktop.timedate1",
248 "xbb", (int64_t)t, relative, interactive);
250 log_error("Failed to set time: %s", bus_error_message(&error, -r));
255 static int set_timezone(sd_bus *bus, char **args, unsigned n) {
256 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
262 polkit_agent_open_if_enabled();
264 r = sd_bus_call_method(bus,
265 "org.freedesktop.timedate1",
266 "/org/freedesktop/timedate1",
267 "org.freedesktop.timedate1",
271 "sb", args[1], arg_ask_password);
273 log_error("Failed to set timezone: %s", bus_error_message(&error, -r));
278 static int set_local_rtc(sd_bus *bus, char **args, unsigned n) {
279 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
285 polkit_agent_open_if_enabled();
287 b = parse_boolean(args[1]);
289 log_error("Failed to parse local RTC setting: %s", args[1]);
293 r = sd_bus_call_method(bus,
294 "org.freedesktop.timedate1",
295 "/org/freedesktop/timedate1",
296 "org.freedesktop.timedate1",
300 "bbb", b, arg_adjust_system_clock, arg_ask_password);
302 log_error("Failed to set local RTC: %s", bus_error_message(&error, -r));
307 static int set_ntp(sd_bus *bus, char **args, unsigned n) {
308 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
314 polkit_agent_open_if_enabled();
316 b = parse_boolean(args[1]);
318 log_error("Failed to parse NTP setting: %s", args[1]);
322 r = sd_bus_call_method(bus,
323 "org.freedesktop.timedate1",
324 "/org/freedesktop/timedate1",
325 "org.freedesktop.timedate1",
329 "bb", b, arg_ask_password);
331 log_error("Failed to set ntp: %s", bus_error_message(&error, -r));
336 static int list_timezones(sd_bus *bus, char **args, unsigned n) {
337 _cleanup_fclose_ FILE *f = NULL;
338 _cleanup_strv_free_ char **zones = NULL;
344 f = fopen("/usr/share/zoneinfo/zone.tab", "re");
346 log_error("Failed to open timezone database: %m");
351 char l[LINE_MAX], *p, **z, *w;
354 if (!fgets(l, sizeof(l), f)) {
358 log_error("Failed to read timezone database: %m");
364 if (isempty(p) || *p == '#')
368 /* Skip over country code */
369 p += strcspn(p, WHITESPACE);
370 p += strspn(p, WHITESPACE);
372 /* Skip over coordinates */
373 p += strcspn(p, WHITESPACE);
374 p += strspn(p, WHITESPACE);
376 /* Found timezone name */
377 k = strcspn(p, WHITESPACE);
385 z = realloc(zones, sizeof(char*) * (n_zones + 2));
392 zones[n_zones++] = w;
396 zones[n_zones] = NULL;
398 pager_open_if_enabled();
406 static int help(void) {
408 printf("%s [OPTIONS...] COMMAND ...\n\n"
409 "Query or change system time and date settings.\n\n"
410 " -h --help Show this help\n"
411 " --version Show package version\n"
412 " --adjust-system-clock\n"
413 " Adjust system clock when changing local RTC mode\n"
414 " --no-pager Do not pipe output into a pager\n"
415 " --no-ask-password Do not prompt for password\n"
416 " -H --host=[USER@]HOST Operate on remote host\n"
417 " -M --machine=CONTAINER Operate on local container\n\n"
419 " status Show current time settings\n"
420 " set-time TIME Set system time\n"
421 " set-timezone ZONE Set system timezone\n"
422 " list-timezones Show known timezones\n"
423 " set-local-rtc BOOL Control whether RTC is in local time\n"
424 " set-ntp BOOL Control whether NTP is enabled\n",
425 program_invocation_short_name);
430 static int parse_argv(int argc, char *argv[]) {
435 ARG_ADJUST_SYSTEM_CLOCK,
439 static const struct option options[] = {
440 { "help", no_argument, NULL, 'h' },
441 { "version", no_argument, NULL, ARG_VERSION },
442 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
443 { "host", required_argument, NULL, 'H' },
444 { "machine", required_argument, NULL, 'M' },
445 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
446 { "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK },
455 while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
464 puts(PACKAGE_STRING);
465 puts(SYSTEMD_FEATURES);
469 arg_transport = BUS_TRANSPORT_REMOTE;
474 arg_transport = BUS_TRANSPORT_CONTAINER;
478 case ARG_NO_ASK_PASSWORD:
479 arg_ask_password = false;
482 case ARG_ADJUST_SYSTEM_CLOCK:
483 arg_adjust_system_clock = true;
494 log_error("Unknown option code %c", c);
502 static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) {
504 static const struct {
512 int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
514 { "status", LESS, 1, show_status },
515 { "set-time", EQUAL, 2, set_time },
516 { "set-timezone", EQUAL, 2, set_timezone },
517 { "list-timezones", EQUAL, 1, list_timezones },
518 { "set-local-rtc", EQUAL, 2, set_local_rtc },
519 { "set-ntp", EQUAL, 2, set_ntp, },
528 left = argc - optind;
531 /* Special rule: no arguments means "status" */
534 if (streq(argv[optind], "help")) {
539 for (i = 0; i < ELEMENTSOF(verbs); i++)
540 if (streq(argv[optind], verbs[i].verb))
543 if (i >= ELEMENTSOF(verbs)) {
544 log_error("Unknown operation %s", argv[optind]);
549 switch (verbs[i].argc_cmp) {
552 if (left != verbs[i].argc) {
553 log_error("Invalid number of arguments.");
560 if (left < verbs[i].argc) {
561 log_error("Too few arguments.");
568 if (left > verbs[i].argc) {
569 log_error("Too many arguments.");
576 assert_not_reached("Unknown comparison operator.");
579 return verbs[i].dispatch(bus, argv + optind, left);
582 int main(int argc, char *argv[]) {
583 int r, ret = EXIT_FAILURE;
584 _cleanup_bus_unref_ sd_bus *bus = NULL;
586 setlocale(LC_ALL, "");
587 log_parse_environment();
590 r = parse_argv(argc, argv);
598 r = bus_open_transport(arg_transport, arg_host, false, &bus);
600 log_error("Failed to create bus connection: %s", strerror(-r));
605 r = timedatectl_main(bus, argc, argv);
606 ret = r < 0 ? EXIT_FAILURE : r;