/* SPDX-License-Identifier: LGPL-2.1+ */ #include #include #include #include "sd-bus.h" #include "sd-event.h" #include "sd-messages.h" #include "alloc-util.h" #include "bus-common-errors.h" #include "bus-error.h" #include "bus-util.h" #include "clock-util.h" #include "def.h" #include "fileio-label.h" #include "fileio.h" #include "fs-util.h" #include "hashmap.h" #include "list.h" #include "main-func.h" #include "missing_capability.h" #include "path-util.h" #include "selinux-util.h" #include "signal-util.h" #include "string-util.h" #include "strv.h" #include "unit-def.h" #include "unit-name.h" #include "user-util.h" #include "util.h" #define NULL_ADJTIME_UTC "0.0 0 0\n0\nUTC\n" #define NULL_ADJTIME_LOCAL "0.0 0 0\n0\nLOCAL\n" typedef struct UnitStatusInfo { char *name; char *load_state; char *unit_file_state; char *active_state; char *path; LIST_FIELDS(struct UnitStatusInfo, units); } UnitStatusInfo; typedef struct Context { char *zone; bool local_rtc; Hashmap *polkit_registry; sd_bus_message *cache; sd_bus_slot *slot_job_removed; LIST_HEAD(UnitStatusInfo, units); } Context; static void unit_status_info_clear(UnitStatusInfo *p) { assert(p); p->load_state = mfree(p->load_state); p->unit_file_state = mfree(p->unit_file_state); p->active_state = mfree(p->active_state); } static void unit_status_info_free(UnitStatusInfo *p) { assert(p); unit_status_info_clear(p); free(p->name); free(p->path); free(p); } static void context_clear(Context *c) { UnitStatusInfo *p; assert(c); free(c->zone); bus_verify_polkit_async_registry_free(c->polkit_registry); sd_bus_message_unref(c->cache); sd_bus_slot_unref(c->slot_job_removed); while ((p = c->units)) { LIST_REMOVE(units, c->units, p); unit_status_info_free(p); } } static int context_add_ntp_service(Context *c, const char *s) { UnitStatusInfo *u; if (!unit_name_is_valid(s, UNIT_NAME_PLAIN)) return -EINVAL; /* Do not add this if it is already listed */ LIST_FOREACH(units, u, c->units) if (streq(u->name, s)) return 0; u = new0(UnitStatusInfo, 1); if (!u) return -ENOMEM; u->name = strdup(s); if (!u->name) { free(u); return -ENOMEM; } LIST_APPEND(units, c->units, u); return 0; } static int context_parse_ntp_services(Context *c) { const char *env, *p; int r; assert(c); env = getenv("SYSTEMD_TIMEDATED_NTP_SERVICES"); if (!env) { r = context_add_ntp_service(c, "systemd-timesyncd.service"); if (r < 0) log_warning_errno(r, "Failed to add NTP service \"systemd-timesyncd.service\", ignoring: %m"); return 0; } for (p = env;;) { _cleanup_free_ char *word = NULL; r = extract_first_word(&p, &word, ":", 0); if (r == 0) break; if (r == -ENOMEM) return log_oom(); if (r < 0) { log_error("Invalid syntax, ignoring: %s", env); break; } r = context_add_ntp_service(c, word); if (r < 0) log_warning_errno(r, "Failed to add NTP service \"%s\", ignoring: %m", word); } return 0; } static int context_ntp_service_is_active(Context *c) { UnitStatusInfo *info; int count = 0; assert(c); /* Call context_update_ntp_status() to update UnitStatusInfo before calling this. */ LIST_FOREACH(units, info, c->units) count += !STRPTR_IN_SET(info->active_state, "inactive", "failed"); return count; } static int context_ntp_service_is_enabled(Context *c) { UnitStatusInfo *info; int count = 0; assert(c); /* Call context_update_ntp_status() to update UnitStatusInfo before calling this. */ LIST_FOREACH(units, info, c->units) count += !STRPTR_IN_SET(info->unit_file_state, "masked", "masked-runtime", "disabled", "bad"); return count; } static int context_ntp_service_exists(Context *c) { UnitStatusInfo *info; int count = 0; assert(c); /* Call context_update_ntp_status() to update UnitStatusInfo before calling this. */ LIST_FOREACH(units, info, c->units) count += streq_ptr(info->load_state, "loaded"); return count; } static int context_read_data(Context *c) { _cleanup_free_ char *t = NULL; int r; assert(c); r = get_timezone(&t); if (r == -EINVAL) log_warning_errno(r, "/etc/localtime should be a symbolic link to a time zone data file in /usr/share/zoneinfo/."); else if (r < 0) log_warning_errno(r, "Failed to get target of /etc/localtime: %m"); free_and_replace(c->zone, t); c->local_rtc = clock_is_localtime(NULL) > 0; return 0; } static int context_write_data_timezone(Context *c) { _cleanup_free_ char *p = NULL; int r = 0; assert(c); if (isempty(c->zone)) { if (unlink("/etc/localtime") < 0 && errno != ENOENT) r = -errno; return r; } p = strappend("../usr/share/zoneinfo/", c->zone); if (!p) return log_oom(); r = symlink_atomic(p, "/etc/localtime"); if (r < 0) return r; return 0; } static int context_write_data_local_rtc(Context *c) { int r; _cleanup_free_ char *s = NULL, *w = NULL; assert(c); r = read_full_file("/etc/adjtime", &s, NULL); if (r < 0) { if (r != -ENOENT) return r; if (!c->local_rtc) return 0; w = strdup(NULL_ADJTIME_LOCAL); if (!w) return -ENOMEM; } else { char *p; const char *e = "\n"; /* default if there is less than 3 lines */ const char *prepend = ""; size_t a, b; p = strchrnul(s, '\n'); if (*p == '\0') /* only one line, no \n terminator */ prepend = "\n0\n"; else if (p[1] == '\0') { /* only one line, with \n terminator */ ++p; prepend = "0\n"; } else { p = strchr(p+1, '\n'); if (!p) { /* only two lines, no \n terminator */ prepend = "\n"; p = s + strlen(s); } else { char *end; /* third line might have a \n terminator or not */ p++; end = strchr(p, '\n'); /* if we actually have a fourth line, use that as suffix "e", otherwise the default \n */ if (end) e = end; } } a = p - s; b = strlen(e); w = new(char, a + (c->local_rtc ? 5 : 3) + strlen(prepend) + b + 1); if (!w) return -ENOMEM; *(char*) mempcpy(stpcpy(stpcpy(mempcpy(w, s, a), prepend), c->local_rtc ? "LOCAL" : "UTC"), e, b) = 0; if (streq(w, NULL_ADJTIME_UTC)) { if (unlink("/etc/adjtime") < 0) if (errno != ENOENT) return -errno; return 0; } } mac_selinux_init(); return write_string_file_atomic_label("/etc/adjtime", w); } static int context_update_ntp_status(Context *c, sd_bus *bus, sd_bus_message *m) { static const struct bus_properties_map map[] = { { "LoadState", "s", NULL, offsetof(UnitStatusInfo, load_state) }, { "ActiveState", "s", NULL, offsetof(UnitStatusInfo, active_state) }, { "UnitFileState", "s", NULL, offsetof(UnitStatusInfo, unit_file_state) }, {} }; UnitStatusInfo *u; int r; assert(c); assert(bus); /* Suppress calling context_update_ntp_status() multiple times within single DBus transaction. */ if (m) { if (m == c->cache) return 0; sd_bus_message_unref(c->cache); c->cache = sd_bus_message_ref(m); } LIST_FOREACH(units, u, c->units) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_free_ char *path = NULL; unit_status_info_clear(u); path = unit_dbus_path_from_name(u->name); if (!path) return -ENOMEM; r = bus_map_all_properties( bus, "org.freedesktop.systemd1", path, map, BUS_MAP_STRDUP, &error, NULL, u); if (r < 0) return log_error_errno(r, "Failed to get properties: %s", bus_error_message(&error, r)); } return 0; } static int match_job_removed(sd_bus_message *m, void *userdata, sd_bus_error *error) { Context *c = userdata; UnitStatusInfo *u; const char *path; unsigned n = 0; int r; assert(c); assert(m); r = sd_bus_message_read(m, "uoss", NULL, &path, NULL, NULL); if (r < 0) { bus_log_parse_error(r); return 0; } LIST_FOREACH(units, u, c->units) if (streq_ptr(path, u->path)) u->path = mfree(u->path); else n += !!u->path; if (n == 0) { (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "NTP", NULL); c->slot_job_removed = sd_bus_slot_unref(c->slot_job_removed); } return 0; } static int unit_start_or_stop(UnitStatusInfo *u, sd_bus *bus, sd_bus_error *error, bool start) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; const char *path; int r; assert(u); assert(bus); assert(error); r = sd_bus_call_method( bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", start ? "StartUnit" : "StopUnit", error, &reply, "ss", u->name, "replace"); if (r < 0) return r; r = sd_bus_message_read(reply, "o", &path); if (r < 0) return bus_log_parse_error(r); r = free_and_strdup(&u->path, path); if (r < 0) return log_oom(); return 0; } static int unit_enable_or_disable(UnitStatusInfo *u, sd_bus *bus, sd_bus_error *error, bool enable) { int r; assert(u); assert(bus); assert(error); /* Call context_update_ntp_status() to update UnitStatusInfo before calling this. */ if (streq(u->unit_file_state, "enabled") == enable) return 0; if (enable) r = sd_bus_call_method( bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "EnableUnitFiles", error, NULL, "asbb", 1, u->name, false, true); else r = sd_bus_call_method( bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "DisableUnitFiles", error, NULL, "asb", 1, u->name, false); if (r < 0) return r; r = sd_bus_call_method( bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "Reload", error, NULL, NULL); if (r < 0) return r; return 0; } static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_time, "t", now(CLOCK_REALTIME)); static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_ntp_sync, "b", ntp_synced()); static int property_get_rtc_time( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { struct tm tm; usec_t t; int r; zero(tm); r = clock_get_hwclock(&tm); if (r == -EBUSY) { log_warning("/dev/rtc is busy. Is somebody keeping it open continuously? That's not a good idea... Returning a bogus RTC timestamp."); t = 0; } else if (r == -ENOENT) { log_debug("/dev/rtc not found."); t = 0; /* no RTC found */ } else if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to read RTC: %m"); else t = (usec_t) timegm(&tm) * USEC_PER_SEC; return sd_bus_message_append(reply, "t", t); } static int property_get_can_ntp( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Context *c = userdata; int r; assert(c); assert(bus); assert(property); assert(reply); assert(error); if (c->slot_job_removed) /* When the previous request is not finished, then assume NTP is enabled. */ return sd_bus_message_append(reply, "b", true); r = context_update_ntp_status(c, bus, reply); if (r < 0) return r; return sd_bus_message_append(reply, "b", context_ntp_service_exists(c) > 0); } static int property_get_ntp( sd_bus *bus, const char *path, const char *interface, const char *property, sd_bus_message *reply, void *userdata, sd_bus_error *error) { Context *c = userdata; int r; assert(c); assert(bus); assert(property); assert(reply); assert(error); if (c->slot_job_removed) /* When the previous request is not finished, then assume NTP is active. */ return sd_bus_message_append(reply, "b", true); r = context_update_ntp_status(c, bus, reply); if (r < 0) return r; return sd_bus_message_append(reply, "b", context_ntp_service_is_active(c) > 0); } static int method_set_timezone(sd_bus_message *m, void *userdata, sd_bus_error *error) { Context *c = userdata; int interactive, r; const char *z; assert(m); assert(c); r = sd_bus_message_read(m, "sb", &z, &interactive); if (r < 0) return r; if (!timezone_is_valid(z, LOG_DEBUG)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid time zone '%s'", z); if (streq_ptr(z, c->zone)) return sd_bus_reply_method_return(m, NULL); r = bus_verify_polkit_async( m, CAP_SYS_TIME, "org.freedesktop.timedate1.set-timezone", NULL, interactive, UID_INVALID, &c->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* No authorization for now, but the async polkit stuff will call us again when it has it */ r = free_and_strdup(&c->zone, z); if (r < 0) return r; /* 1. Write new configuration file */ r = context_write_data_timezone(c); if (r < 0) { log_error_errno(r, "Failed to set time zone: %m"); return sd_bus_error_set_errnof(error, r, "Failed to set time zone: %m"); } /* 2. Make glibc notice the new timezone */ tzset(); /* 3. Tell the kernel our timezone */ r = clock_set_timezone(NULL); if (r < 0) log_debug_errno(r, "Failed to tell kernel about timezone, ignoring: %m"); if (c->local_rtc) { struct timespec ts; struct tm tm; /* 4. Sync RTC from system clock, with the new delta */ assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0); assert_se(localtime_r(&ts.tv_sec, &tm)); r = clock_set_hwclock(&tm); if (r < 0) log_debug_errno(r, "Failed to sync time to hardware clock, ignoring: %m"); } log_struct(LOG_INFO, "MESSAGE_ID=" SD_MESSAGE_TIMEZONE_CHANGE_STR, "TIMEZONE=%s", c->zone, "TIMEZONE_SHORTNAME=%s", tzname[daylight], "DAYLIGHT=%i", daylight, LOG_MESSAGE("Changed time zone to '%s' (%s).", c->zone, tzname[daylight])); (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "Timezone", NULL); return sd_bus_reply_method_return(m, NULL); } static int method_set_local_rtc(sd_bus_message *m, void *userdata, sd_bus_error *error) { int lrtc, fix_system, interactive; Context *c = userdata; struct timespec ts; int r; assert(m); assert(c); r = sd_bus_message_read(m, "bbb", &lrtc, &fix_system, &interactive); if (r < 0) return r; if (lrtc == c->local_rtc) return sd_bus_reply_method_return(m, NULL); r = bus_verify_polkit_async( m, CAP_SYS_TIME, "org.freedesktop.timedate1.set-local-rtc", NULL, interactive, UID_INVALID, &c->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; c->local_rtc = lrtc; /* 1. Write new configuration file */ r = context_write_data_local_rtc(c); if (r < 0) { log_error_errno(r, "Failed to set RTC to local/UTC: %m"); return sd_bus_error_set_errnof(error, r, "Failed to set RTC to local/UTC: %m"); } /* 2. Tell the kernel our timezone */ r = clock_set_timezone(NULL); if (r < 0) log_debug_errno(r, "Failed to tell kernel about timezone, ignoring: %m"); /* 3. Synchronize clocks */ assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0); if (fix_system) { struct tm tm; /* Sync system clock from RTC; first, initialize the timezone fields of struct tm. */ if (c->local_rtc) localtime_r(&ts.tv_sec, &tm); else gmtime_r(&ts.tv_sec, &tm); /* Override the main fields of struct tm, but not the timezone fields */ r = clock_get_hwclock(&tm); if (r < 0) log_debug_errno(r, "Failed to get hardware clock, ignoring: %m"); else { /* And set the system clock with this */ if (c->local_rtc) ts.tv_sec = mktime(&tm); else ts.tv_sec = timegm(&tm); if (clock_settime(CLOCK_REALTIME, &ts) < 0) log_debug_errno(errno, "Failed to update system clock, ignoring: %m"); } } else { struct tm tm; /* Sync RTC from system clock */ if (c->local_rtc) localtime_r(&ts.tv_sec, &tm); else gmtime_r(&ts.tv_sec, &tm); r = clock_set_hwclock(&tm); if (r < 0) log_debug_errno(r, "Failed to sync time to hardware clock, ignoring: %m"); } log_info("RTC configured to %s time.", c->local_rtc ? "local" : "UTC"); (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "LocalRTC", NULL); return sd_bus_reply_method_return(m, NULL); } static int method_set_time(sd_bus_message *m, void *userdata, sd_bus_error *error) { sd_bus *bus = sd_bus_message_get_bus(m); int relative, interactive, r; Context *c = userdata; int64_t utc; struct timespec ts; usec_t start; struct tm tm; assert(m); assert(c); if (c->slot_job_removed) return sd_bus_error_set(error, BUS_ERROR_AUTOMATIC_TIME_SYNC_ENABLED, "Previous request is not finished, refusing."); r = context_update_ntp_status(c, bus, m); if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to update context: %m"); if (context_ntp_service_is_active(c) > 0) return sd_bus_error_set(error, BUS_ERROR_AUTOMATIC_TIME_SYNC_ENABLED, "Automatic time synchronization is enabled"); /* this only gets used if dbus does not provide a timestamp */ start = now(CLOCK_MONOTONIC); r = sd_bus_message_read(m, "xbb", &utc, &relative, &interactive); if (r < 0) return r; if (!relative && utc <= 0) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid absolute time"); if (relative && utc == 0) return sd_bus_reply_method_return(m, NULL); if (relative) { usec_t n, x; n = now(CLOCK_REALTIME); x = n + utc; if ((utc > 0 && x < n) || (utc < 0 && x > n)) return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Time value overflow"); timespec_store(&ts, x); } else timespec_store(&ts, (usec_t) utc); r = bus_verify_polkit_async( m, CAP_SYS_TIME, "org.freedesktop.timedate1.set-time", NULL, interactive, UID_INVALID, &c->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* adjust ts for time spent in program */ r = sd_bus_message_get_monotonic_usec(m, &start); /* when sd_bus_message_get_monotonic_usec() returns -ENODATA it does not modify &start */ if (r < 0 && r != -ENODATA) return r; timespec_store(&ts, timespec_load(&ts) + (now(CLOCK_MONOTONIC) - start)); /* Set system clock */ if (clock_settime(CLOCK_REALTIME, &ts) < 0) { log_error_errno(errno, "Failed to set local time: %m"); return sd_bus_error_set_errnof(error, errno, "Failed to set local time: %m"); } /* Sync down to RTC */ if (c->local_rtc) localtime_r(&ts.tv_sec, &tm); else gmtime_r(&ts.tv_sec, &tm); r = clock_set_hwclock(&tm); if (r < 0) log_debug_errno(r, "Failed to update hardware clock, ignoring: %m"); log_struct(LOG_INFO, "MESSAGE_ID=" SD_MESSAGE_TIME_CHANGE_STR, "REALTIME="USEC_FMT, timespec_load(&ts), LOG_MESSAGE("Changed local time to %s", ctime(&ts.tv_sec))); return sd_bus_reply_method_return(m, NULL); } static int method_set_ntp(sd_bus_message *m, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *slot = NULL; sd_bus *bus = sd_bus_message_get_bus(m); Context *c = userdata; UnitStatusInfo *u; int enable, interactive, q, r; assert(m); assert(bus); assert(c); r = sd_bus_message_read(m, "bb", &enable, &interactive); if (r < 0) return r; r = context_update_ntp_status(c, bus, m); if (r < 0) return r; if (context_ntp_service_exists(c) <= 0) return sd_bus_error_set(error, BUS_ERROR_NO_NTP_SUPPORT, "NTP not supported"); r = bus_verify_polkit_async( m, CAP_SYS_TIME, "org.freedesktop.timedate1.set-ntp", NULL, interactive, UID_INVALID, &c->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; /* This method may be called frequently. Forget the previous job if it has not completed yet. */ LIST_FOREACH(units, u, c->units) u->path = mfree(u->path); if (!c->slot_job_removed) { r = sd_bus_match_signal_async( bus, &slot, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "JobRemoved", match_job_removed, NULL, c); if (r < 0) return r; } if (!enable) LIST_FOREACH(units, u, c->units) { if (!streq(u->load_state, "loaded")) continue; q = unit_enable_or_disable(u, bus, error, enable); if (q < 0) r = q; q = unit_start_or_stop(u, bus, error, enable); if (q < 0) r = q; } else if (context_ntp_service_is_enabled(c) <= 0) LIST_FOREACH(units, u, c->units) { if (!streq(u->load_state, "loaded")) continue; r = unit_enable_or_disable(u, bus, error, enable); if (r < 0) continue; r = unit_start_or_stop(u, bus, error, enable); break; } else LIST_FOREACH(units, u, c->units) { if (!streq(u->load_state, "loaded") || !streq(u->unit_file_state, "enabled")) continue; r = unit_start_or_stop(u, bus, error, enable); break; } if (r < 0) return r; if (slot) c->slot_job_removed = TAKE_PTR(slot); log_info("Set NTP to %sd", enable_disable(enable)); return sd_bus_reply_method_return(m, NULL); } static int method_list_timezones(sd_bus_message *m, void *userdata, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; _cleanup_strv_free_ char **zones = NULL; int r; assert(m); r = get_timezones(&zones); if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to read list of time zones: %m"); r = sd_bus_message_new_method_return(m, &reply); if (r < 0) return r; r = sd_bus_message_append_strv(reply, zones); if (r < 0) return r; return sd_bus_send(NULL, reply, NULL); } static const sd_bus_vtable timedate_vtable[] = { SD_BUS_VTABLE_START(0), SD_BUS_PROPERTY("Timezone", "s", NULL, offsetof(Context, zone), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("LocalRTC", "b", bus_property_get_bool, offsetof(Context, local_rtc), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("CanNTP", "b", property_get_can_ntp, 0, 0), SD_BUS_PROPERTY("NTP", "b", property_get_ntp, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("NTPSynchronized", "b", property_get_ntp_sync, 0, 0), SD_BUS_PROPERTY("TimeUSec", "t", property_get_time, 0, 0), SD_BUS_PROPERTY("RTCTimeUSec", "t", property_get_rtc_time, 0, 0), SD_BUS_METHOD("SetTime", "xbb", NULL, method_set_time, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("SetTimezone", "sb", NULL, method_set_timezone, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("SetLocalRTC", "bbb", NULL, method_set_local_rtc, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("SetNTP", "bb", NULL, method_set_ntp, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("ListTimezones", NULL, "as", method_list_timezones, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_VTABLE_END, }; static int connect_bus(Context *c, sd_event *event, sd_bus **_bus) { _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; int r; assert(c); assert(event); assert(_bus); r = sd_bus_default_system(&bus); if (r < 0) return log_error_errno(r, "Failed to get system bus connection: %m"); r = sd_bus_add_object_vtable(bus, NULL, "/org/freedesktop/timedate1", "org.freedesktop.timedate1", timedate_vtable, c); if (r < 0) return log_error_errno(r, "Failed to register object: %m"); r = sd_bus_request_name_async(bus, NULL, "org.freedesktop.timedate1", 0, NULL, NULL); if (r < 0) return log_error_errno(r, "Failed to request name: %m"); r = sd_bus_attach_event(bus, event, 0); if (r < 0) return log_error_errno(r, "Failed to attach bus to event loop: %m"); *_bus = TAKE_PTR(bus); return 0; } static int run(int argc, char *argv[]) { _cleanup_(context_clear) Context context = {}; _cleanup_(sd_event_unrefp) sd_event *event = NULL; _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; int r; log_setup_service(); umask(0022); if (argc != 1) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "This program takes no arguments."); assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1) >= 0); r = sd_event_default(&event); if (r < 0) return log_error_errno(r, "Failed to allocate event loop: %m"); (void) sd_event_set_watchdog(event, true); r = sd_event_add_signal(event, NULL, SIGINT, NULL, NULL); if (r < 0) return log_error_errno(r, "Failed to install SIGINT handler: %m"); r = sd_event_add_signal(event, NULL, SIGTERM, NULL, NULL); if (r < 0) return log_error_errno(r, "Failed to install SIGTERM handler: %m"); r = connect_bus(&context, event, &bus); if (r < 0) return r; (void) sd_bus_negotiate_timestamp(bus, true); r = context_read_data(&context); if (r < 0) return log_error_errno(r, "Failed to read time zone data: %m"); r = context_parse_ntp_services(&context); if (r < 0) return r; r = bus_event_loop_with_idle(event, bus, "org.freedesktop.timedate1", DEFAULT_EXIT_USEC, NULL, NULL); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); return 0; } DEFINE_MAIN_FUNCTION(run);