/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2012 Lennart Poettering Copyright 2013 Kay Sievers systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdlib.h> #include <stdbool.h> #include <getopt.h> #include <locale.h> #include "sd-bus.h" #include "bus-util.h" #include "bus-error.h" #include "util.h" #include "spawn-polkit-agent.h" #include "build.h" #include "strv.h" #include "pager.h" #include "terminal-util.h" static bool arg_no_pager = false; static bool arg_ask_password = true; static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; static char *arg_host = NULL; static bool arg_adjust_system_clock = false; static void pager_open_if_enabled(void) { if (arg_no_pager) return; pager_open(false); } static void polkit_agent_open_if_enabled(void) { /* Open the polkit agent as a child process if necessary */ if (!arg_ask_password) return; if (arg_transport != BUS_TRANSPORT_LOCAL) return; polkit_agent_open(); } typedef struct StatusInfo { usec_t time; char *timezone; usec_t rtc_time; bool rtc_local; bool ntp_enabled; bool ntp_capable; bool ntp_synced; } StatusInfo; static void status_info_clear(StatusInfo *info) { if (info) { free(info->timezone); zero(*info); } } static void print_status_info(const StatusInfo *i) { char a[FORMAT_TIMESTAMP_MAX]; struct tm tm; time_t sec; bool have_time = false; const char *old_tz = NULL, *tz; int r; assert(i); /* Save the old $TZ */ tz = getenv("TZ"); if (tz) old_tz = strdupa(tz); /* Set the new $TZ */ if (setenv("TZ", isempty(i->timezone) ? "UTC" : i->timezone, true) < 0) log_warning_errno(errno, "Failed to set TZ environment variable, ignoring: %m"); else tzset(); if (i->time != 0) { sec = (time_t) (i->time / USEC_PER_SEC); have_time = true; } else if (IN_SET(arg_transport, BUS_TRANSPORT_LOCAL, BUS_TRANSPORT_MACHINE)) { sec = time(NULL); have_time = true; } else log_warning("Could not get time from timedated and not operating locally, ignoring."); if (have_time) { xstrftime(a, "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)); printf(" Local time: %.*s\n", (int) sizeof(a), a); xstrftime(a, "%a %Y-%m-%d %H:%M:%S UTC", gmtime_r(&sec, &tm)); printf(" Universal time: %.*s\n", (int) sizeof(a), a); } else { printf(" Local time: %s\n", "n/a"); printf(" Universal time: %s\n", "n/a"); } if (i->rtc_time > 0) { time_t rtc_sec; rtc_sec = (time_t) (i->rtc_time / USEC_PER_SEC); xstrftime(a, "%a %Y-%m-%d %H:%M:%S", gmtime_r(&rtc_sec, &tm)); printf(" RTC time: %.*s\n", (int) sizeof(a), a); } else printf(" RTC time: %s\n", "n/a"); if (have_time) xstrftime(a, "%Z, %z", localtime_r(&sec, &tm)); /* Restore the $TZ */ if (old_tz) r = setenv("TZ", old_tz, true); else r = unsetenv("TZ"); if (r < 0) log_warning_errno(errno, "Failed to set TZ environment variable, ignoring: %m"); else tzset(); printf(" Time zone: %s (%.*s)\n" " Network time on: %s\n" "NTP synchronized: %s\n" " RTC in local TZ: %s\n", strna(i->timezone), (int) sizeof(a), have_time ? a : "n/a", i->ntp_capable ? yes_no(i->ntp_enabled) : "n/a", yes_no(i->ntp_synced), yes_no(i->rtc_local)); if (i->rtc_local) fputs("\n" ANSI_HIGHLIGHT "Warning: The system is configured to read the RTC time in the local time zone.\n" " This mode can not be fully supported. It will create various problems\n" " with time zone changes and daylight saving time adjustments. The RTC\n" " time is never updated, it relies on external facilities to maintain it.\n" " If at all possible, use RTC in UTC by calling\n" " 'timedatectl set-local-rtc 0'." ANSI_NORMAL "\n", stdout); } static int show_status(sd_bus *bus, char **args, unsigned n) { _cleanup_(status_info_clear) StatusInfo info = {}; static const struct bus_properties_map map[] = { { "Timezone", "s", NULL, offsetof(StatusInfo, timezone) }, { "LocalRTC", "b", NULL, offsetof(StatusInfo, rtc_local) }, { "NTP", "b", NULL, offsetof(StatusInfo, ntp_enabled) }, { "CanNTP", "b", NULL, offsetof(StatusInfo, ntp_capable) }, { "NTPSynchronized", "b", NULL, offsetof(StatusInfo, ntp_synced) }, { "TimeUSec", "t", NULL, offsetof(StatusInfo, time) }, { "RTCTimeUSec", "t", NULL, offsetof(StatusInfo, rtc_time) }, {} }; int r; assert(bus); r = bus_map_all_properties(bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", map, &info); if (r < 0) return log_error_errno(r, "Failed to query server: %m"); print_status_info(&info); return r; } static int set_time(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; bool relative = false, interactive = arg_ask_password; usec_t t; int r; assert(args); assert(n == 2); polkit_agent_open_if_enabled(); r = parse_timestamp(args[1], &t); if (r < 0) { log_error("Failed to parse time specification: %s", args[1]); return r; } r = sd_bus_call_method(bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "SetTime", &error, NULL, "xbb", (int64_t)t, relative, interactive); if (r < 0) log_error("Failed to set time: %s", bus_error_message(&error, -r)); return r; } static int set_timezone(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; int r; assert(args); assert(n == 2); polkit_agent_open_if_enabled(); r = sd_bus_call_method(bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "SetTimezone", &error, NULL, "sb", args[1], arg_ask_password); if (r < 0) log_error("Failed to set time zone: %s", bus_error_message(&error, -r)); return r; } static int set_local_rtc(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; int r, b; assert(args); assert(n == 2); polkit_agent_open_if_enabled(); b = parse_boolean(args[1]); if (b < 0) { log_error("Failed to parse local RTC setting: %s", args[1]); return b; } r = sd_bus_call_method(bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "SetLocalRTC", &error, NULL, "bbb", b, arg_adjust_system_clock, arg_ask_password); if (r < 0) log_error("Failed to set local RTC: %s", bus_error_message(&error, -r)); return r; } static int set_ntp(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; int b, r; assert(args); assert(n == 2); polkit_agent_open_if_enabled(); b = parse_boolean(args[1]); if (b < 0) { log_error("Failed to parse NTP setting: %s", args[1]); return b; } r = sd_bus_call_method(bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "SetNTP", &error, NULL, "bb", b, arg_ask_password); if (r < 0) log_error("Failed to set ntp: %s", bus_error_message(&error, -r)); return r; } static int list_timezones(sd_bus *bus, char **args, unsigned n) { _cleanup_strv_free_ char **zones = NULL; int r; assert(args); assert(n == 1); r = get_timezones(&zones); if (r < 0) return log_error_errno(r, "Failed to read list of time zones: %m"); pager_open_if_enabled(); strv_print(zones); return 0; } static void help(void) { printf("%s [OPTIONS...] COMMAND ...\n\n" "Query or change system time and date settings.\n\n" " -h --help Show this help message\n" " --version Show package version\n" " --no-pager Do not pipe output into a pager\n" " --no-ask-password Do not prompt for password\n" " -H --host=[USER@]HOST Operate on remote host\n" " -M --machine=CONTAINER Operate on local container\n" " --adjust-system-clock Adjust system clock when changing local RTC mode\n\n" "Commands:\n" " status Show current time settings\n" " set-time TIME Set system time\n" " set-timezone ZONE Set system time zone\n" " list-timezones Show known time zones\n" " set-local-rtc BOOL Control whether RTC is in local time\n" " set-ntp BOOL Enable or disable network time synchronization\n", program_invocation_short_name); } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_NO_PAGER, ARG_ADJUST_SYSTEM_CLOCK, ARG_NO_ASK_PASSWORD }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "no-pager", no_argument, NULL, ARG_NO_PAGER }, { "host", required_argument, NULL, 'H' }, { "machine", required_argument, NULL, 'M' }, { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD }, { "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) switch (c) { case 'h': help(); return 0; case ARG_VERSION: puts(PACKAGE_STRING); puts(SYSTEMD_FEATURES); return 0; case 'H': arg_transport = BUS_TRANSPORT_REMOTE; arg_host = optarg; break; case 'M': arg_transport = BUS_TRANSPORT_MACHINE; arg_host = optarg; break; case ARG_NO_ASK_PASSWORD: arg_ask_password = false; break; case ARG_ADJUST_SYSTEM_CLOCK: arg_adjust_system_clock = true; break; case ARG_NO_PAGER: arg_no_pager = true; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } return 1; } static int timedatectl_main(sd_bus *bus, int argc, char *argv[]) { static const struct { const char* verb; const enum { MORE, LESS, EQUAL } argc_cmp; const int argc; int (* const dispatch)(sd_bus *bus, char **args, unsigned n); } verbs[] = { { "status", LESS, 1, show_status }, { "set-time", EQUAL, 2, set_time }, { "set-timezone", EQUAL, 2, set_timezone }, { "list-timezones", EQUAL, 1, list_timezones }, { "set-local-rtc", EQUAL, 2, set_local_rtc }, { "set-ntp", EQUAL, 2, set_ntp, }, }; int left; unsigned i; assert(argc >= 0); assert(argv); left = argc - optind; if (left <= 0) /* Special rule: no arguments means "status" */ i = 0; else { if (streq(argv[optind], "help")) { help(); return 0; } for (i = 0; i < ELEMENTSOF(verbs); i++) if (streq(argv[optind], verbs[i].verb)) break; if (i >= ELEMENTSOF(verbs)) { log_error("Unknown operation %s", argv[optind]); return -EINVAL; } } switch (verbs[i].argc_cmp) { case EQUAL: if (left != verbs[i].argc) { log_error("Invalid number of arguments."); return -EINVAL; } break; case MORE: if (left < verbs[i].argc) { log_error("Too few arguments."); return -EINVAL; } break; case LESS: if (left > verbs[i].argc) { log_error("Too many arguments."); return -EINVAL; } break; default: assert_not_reached("Unknown comparison operator."); } return verbs[i].dispatch(bus, argv + optind, left); } int main(int argc, char *argv[]) { _cleanup_bus_flush_close_unref_ sd_bus *bus = NULL; int r; setlocale(LC_ALL, ""); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto finish; r = bus_open_transport(arg_transport, arg_host, false, &bus); if (r < 0) { log_error_errno(r, "Failed to create bus connection: %m"); goto finish; } r = timedatectl_main(bus, argc, argv); finish: pager_close(); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }