/*-*- 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 <unistd.h> #include <getopt.h> #include <locale.h> #include <string.h> #include <sys/timex.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 "time-dst.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; polkit_agent_open(); } typedef struct StatusInfo { usec_t time; const char *timezone; usec_t rtc_time; bool rtc_local; bool ntp_enabled; bool ntp_capable; bool ntp_synced; } StatusInfo; static const char *jump_str(int delta_minutes, char *s, size_t size) { if (delta_minutes == 60) return "one hour forward"; if (delta_minutes == -60) return "one hour backwards"; if (delta_minutes < 0) { snprintf(s, size, "%i minutes backwards", -delta_minutes); return s; } if (delta_minutes > 0) { snprintf(s, size, "%i minutes forward", delta_minutes); return s; } return ""; } static void print_status_info(StatusInfo *i) { char a[FORMAT_TIMESTAMP_MAX]; char b[FORMAT_TIMESTAMP_MAX]; char s[32]; struct tm tm; time_t sec; char *zc, *zn; time_t t, tc, tn; int dn; bool is_dstc, is_dstn; int r; assert(i); /* Enforce the values of /etc/localtime */ if (getenv("TZ")) { fprintf(stderr, "Warning: ignoring the TZ variable, reading the system's timezone setting only.\n\n"); unsetenv("TZ"); } sec = (time_t) (i->time / USEC_PER_SEC); zero(tm); assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) > 0); char_array_0(a); printf(" Local time: %s\n", a); zero(tm); assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S UTC", gmtime_r(&sec, &tm)) > 0); char_array_0(a); printf(" Universal time: %s\n", a); if (i->rtc_time > 0) { time_t rtc_sec; rtc_sec = (time_t)(i->rtc_time / USEC_PER_SEC); zero(tm); assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S", gmtime_r(&rtc_sec, &tm)) > 0); char_array_0(a); printf(" RTC time: %s\n", a); } else printf(" RTC time: n/a\n"); zero(tm); assert_se(strftime(a, sizeof(a), "%Z, %z", localtime_r(&sec, &tm)) > 0); char_array_0(a); printf(" Timezone: %s (%s)\n" " NTP enabled: %s\n" "NTP synchronized: %s\n" " RTC in local TZ: %s\n", strna(i->timezone), a, i->ntp_capable ? yes_no(i->ntp_enabled) : "n/a", yes_no(i->ntp_synced), yes_no(i->rtc_local)); r = time_get_dst(sec, "/etc/localtime", &tc, &zc, &is_dstc, &tn, &dn, &zn, &is_dstn); if (r < 0) printf(" DST active: n/a\n"); else { printf(" DST active: %s\n", yes_no(is_dstc)); t = tc - 1; zero(tm); assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0); char_array_0(a); zero(tm); assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tc, &tm)) > 0); char_array_0(b); printf(" Last DST change: DST %s at\n" " %s\n" " %s\n", is_dstc ? "began" : "ended", a, b); t = tn - 1; zero(tm); assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0); char_array_0(a); zero(tm); assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tn, &tm)) > 0); char_array_0(b); printf(" Next DST change: DST %s (the clock jumps %s) at\n" " %s\n" " %s\n", is_dstn ? "begins" : "ends", jump_str(dn, s, sizeof(s)), a, b); free(zc); free(zn); } if (i->rtc_local) fputs("\n" ANSI_HIGHLIGHT_ON "Warning: The RTC is configured to maintain time in the local timezone. This\n" " mode is not fully supported and will create various problems with time\n" " zone changes and daylight saving adjustments. If at all possible use\n" " RTC in UTC, by calling 'timedatectl set-local-rtc 0'" ANSI_HIGHLIGHT_OFF ".\n", stdout); } static int get_timedate_property_bool(sd_bus *bus, const char *name, bool *target) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; int r, b; assert(name); r = sd_bus_get_property_trivial( bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", name, &error, 'b', &b); if (r < 0) { log_error("Failed to get property: %s %s", name, bus_error_message(&error, -r)); return r; } *target = b; return 0; } static int get_timedate_property_usec(sd_bus *bus, const char *name, usec_t *target) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; int r; assert(name); r = sd_bus_get_property_trivial( bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", name, &error, 't', target); if (r < 0) { log_error("Failed to get property: %s %s", name, bus_error_message(&error, -r)); return r; } return 0; } static int show_status(sd_bus *bus, char **args, unsigned n) { _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; int r; StatusInfo info = {}; assert(bus); r = sd_bus_get_property( bus, "org.freedesktop.timedate1", "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "Timezone", &error, &reply, "s"); if (r < 0) { log_error("Failed to get property: Timezone %s", bus_error_message(&error, -r)); return r; } r = sd_bus_message_read(reply, "s", &info.timezone); if (r < 0) return r; r = get_timedate_property_bool(bus, "LocalRTC", &info.rtc_local); if (r < 0) return r; r = get_timedate_property_bool(bus, "NTP", &info.ntp_enabled); if (r < 0) return r; r = get_timedate_property_bool(bus, "CanNTP", &info.ntp_capable); if (r < 0) return r; r = get_timedate_property_bool(bus, "NTPSynchronized", &info.ntp_synced); if (r < 0) return r; r = get_timedate_property_usec(bus, "TimeUSec", &info.time); if (r < 0) return r; r = get_timedate_property_usec(bus, "RTCTimeUSec", &info.rtc_time); if (r < 0) return r; print_status_info(&info); return 0; } 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 timezone: %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_fclose_ FILE *f = NULL; _cleanup_strv_free_ char **zones = NULL; size_t n_zones = 0; assert(args); assert(n == 1); f = fopen("/usr/share/zoneinfo/zone.tab", "re"); if (!f) { log_error("Failed to open timezone database: %m"); return -errno; } for (;;) { char l[LINE_MAX], *p, **z, *w; size_t k; if (!fgets(l, sizeof(l), f)) { if (feof(f)) break; log_error("Failed to read timezone database: %m"); return -errno; } p = strstrip(l); if (isempty(p) || *p == '#') continue; /* Skip over country code */ p += strcspn(p, WHITESPACE); p += strspn(p, WHITESPACE); /* Skip over coordinates */ p += strcspn(p, WHITESPACE); p += strspn(p, WHITESPACE); /* Found timezone name */ k = strcspn(p, WHITESPACE); if (k <= 0) continue; w = strndup(p, k); if (!w) return log_oom(); z = realloc(zones, sizeof(char*) * (n_zones + 2)); if (!z) { free(w); return log_oom(); } zones = z; zones[n_zones++] = w; } if (zones) zones[n_zones] = NULL; pager_open_if_enabled(); strv_sort(zones); strv_print(zones); return 0; } static int help(void) { printf("%s [OPTIONS...] COMMAND ...\n\n" "Query or change system time and date settings.\n\n" " -h --help Show this help\n" " --version Show package version\n" " --adjust-system-clock\n" " Adjust system clock when changing local RTC mode\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\n" "Commands:\n" " status Show current time settings\n" " set-time TIME Set system time\n" " set-timezone ZONE Set system timezone\n" " list-timezones Show known timezones\n" " set-local-rtc BOOL Control whether RTC is in local time\n" " set-ntp BOOL Control whether NTP is enabled\n", program_invocation_short_name); return 0; } 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 }, { NULL, 0, NULL, 0 } }; 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_CONTAINER; 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: log_error("Unknown option code %c", c); return -EINVAL; } } 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[]) { int r, ret = EXIT_FAILURE; _cleanup_bus_unref_ sd_bus *bus = NULL; setlocale(LC_ALL, ""); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r < 0) goto finish; else if (r == 0) { ret = EXIT_SUCCESS; goto finish; } r = bus_open_transport(arg_transport, arg_host, false, &bus); if (r < 0) { log_error("Failed to create bus connection: %s", strerror(-r)); ret = EXIT_FAILURE; goto finish; } r = timedatectl_main(bus, argc, argv); ret = r < 0 ? EXIT_FAILURE : r; finish: pager_close(); return ret; }