/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #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-get-properties.h" #include "bus-locator.h" #include "bus-log-control-api.h" #include "bus-map-properties.h" #include "bus-polkit.h" #include "bus-unit-util.h" #include "clock-util.h" #include "conf-files.h" #include "constants.h" #include "daemon-util.h" #include "fd-util.h" #include "fileio.h" #include "fs-util.h" #include "hashmap.h" #include "hwclock-util.h" #include "list.h" #include "main-func.h" #include "memory-util.h" #include "missing_capability.h" #include "path-util.h" #include "selinux-util.h" #include "service-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" #define NULL_ADJTIME_UTC "0.0 0 0\n0\nUTC\n" #define NULL_ADJTIME_LOCAL "0.0 0 0\n0\nLOCAL\n" #define UNIT_LIST_DIRS (const char* const*) CONF_PATHS_STRV("systemd/ntp-units.d") #define SET_NTP_IN_FLIGHT_MAX 16 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; Set *set_ntp_calls; sd_bus_slot *slot_job_removed; LIST_HEAD(UnitStatusInfo, units); } Context; #define log_unit_full_errno_zerook(unit, level, error, ...) \ ({ \ const UnitStatusInfo *_u = (unit); \ _u ? log_object_internal(level, error, PROJECT_FILE, __LINE__, __func__, "UNIT=", _u->name, NULL, NULL, ##__VA_ARGS__) : \ log_internal(level, error, PROJECT_FILE, __LINE__, __func__, ##__VA_ARGS__); \ }) #define log_unit_full_errno(unit, level, error, ...) \ ({ \ int _error = (error); \ ASSERT_NON_ZERO(_error); \ log_unit_full_errno_zerook(unit, level, _error, ##__VA_ARGS__); \ }) #define log_unit_full(unit, level, ...) (void) log_unit_full_errno_zerook(unit, level, 0, ##__VA_ARGS__) #define log_unit_debug(unit, ...) log_unit_full(unit, LOG_DEBUG, ##__VA_ARGS__) #define log_unit_info(unit, ...) log_unit_full(unit, LOG_INFO, ##__VA_ARGS__) #define log_unit_notice(unit, ...) log_unit_full(unit, LOG_NOTICE, ##__VA_ARGS__) #define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, ##__VA_ARGS__) #define log_unit_error(unit, ...) log_unit_full(unit, LOG_ERR, ##__VA_ARGS__) #define log_unit_debug_errno(unit, error, ...) log_unit_full_errno(unit, LOG_DEBUG, error, ##__VA_ARGS__) #define log_unit_info_errno(unit, error, ...) log_unit_full_errno(unit, LOG_INFO, error, ##__VA_ARGS__) #define log_unit_notice_errno(unit, error, ...) log_unit_full_errno(unit, LOG_NOTICE, error, ##__VA_ARGS__) #define log_unit_warning_errno(unit, error, ...) log_unit_full_errno(unit, LOG_WARNING, error, ##__VA_ARGS__) #define log_unit_error_errno(unit, error, ...) log_unit_full_errno(unit, LOG_ERR, error, ##__VA_ARGS__) 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 UnitStatusInfo *unit_status_info_free(UnitStatusInfo *p) { if (!p) return NULL; unit_status_info_clear(p); free(p->name); free(p->path); return mfree(p); } DEFINE_TRIVIAL_CLEANUP_FUNC(UnitStatusInfo*, unit_status_info_free); static void context_clear(Context *c) { assert(c); free(c->zone); hashmap_free(c->polkit_registry); sd_bus_message_unref(c->cache); set_free(c->set_ntp_calls); sd_bus_slot_unref(c->slot_job_removed); LIST_CLEAR(units, c->units, unit_status_info_free); } static int context_add_ntp_service(Context *c, const char *s, const char *source) { _cleanup_(unit_status_info_freep) UnitStatusInfo *unit = NULL; assert(c); assert(s); assert(source); 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; unit = new0(UnitStatusInfo, 1); if (!unit) return -ENOMEM; unit->name = strdup(s); if (!unit->name) return -ENOMEM; LIST_APPEND(units, c->units, unit); log_unit_debug(unit, "added from %s.", source); TAKE_PTR(unit); return 0; } static int context_parse_ntp_services_from_environment(Context *c) { const char *env, *p; int r; assert(c); env = getenv("SYSTEMD_TIMEDATED_NTP_SERVICES"); if (!env) return 0; log_debug("Using list of ntp services from environment variable $SYSTEMD_TIMEDATED_NTP_SERVICES=%s.", env); for (p = env;;) { _cleanup_free_ char *word = NULL; r = extract_first_word(&p, &word, ":", 0); if (r == 0) break; if (r == -ENOMEM) return log_oom(); if (r < 0) { log_error("Invalid syntax, ignoring: %s", env); break; } r = context_add_ntp_service(c, word, "$SYSTEMD_TIMEDATED_NTP_SERVICES"); if (r < 0) log_warning_errno(r, "Failed to add NTP service \"%s\", ignoring: %m", word); } return 1; } static int context_parse_ntp_services_from_disk(Context *c) { _cleanup_strv_free_ char **files = NULL; int r; r = conf_files_list_strv(&files, ".list", NULL, CONF_FILES_FILTER_MASKED, UNIT_LIST_DIRS); if (r < 0) return log_error_errno(r, "Failed to enumerate .list files: %m"); STRV_FOREACH(f, files) { _cleanup_fclose_ FILE *file = NULL; log_debug("Reading file '%s'", *f); r = fopen_unlocked(*f, "re", &file); if (r < 0) { log_error_errno(r, "Failed to open %s, ignoring: %m", *f); continue; } for (;;) { _cleanup_free_ char *line = NULL; r = read_stripped_line(file, LINE_MAX, &line); if (r < 0) { log_error_errno(r, "Failed to read %s, ignoring: %m", *f); continue; } if (r == 0) break; if (isempty(line) || startswith(line, "#")) continue; r = context_add_ntp_service(c, line, *f); if (r < 0) log_warning_errno(r, "Failed to add NTP service \"%s\", ignoring: %m", line); } } return 1; } static int context_parse_ntp_services(Context *c) { int r; r = context_parse_ntp_services_from_environment(c); if (r != 0) return r; return context_parse_ntp_services_from_disk(c); } static int context_ntp_service_is_active(Context *c) { 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_exists(Context *c) { 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; const char *source; assert(c); /* No timezone is very similar to UTC. Hence in either of these cases link the UTC file in. Except if * it isn't installed, in which case we remove the symlink altogether. Since glibc defaults to an * internal version of UTC in that case behaviour is mostly equivalent. We still prefer creating the * symlink though, since things are more self explanatory then. */ if (isempty(c->zone) || streq(c->zone, "UTC")) { if (access("/usr/share/zoneinfo/UTC", F_OK) < 0) { if (unlink("/etc/localtime") < 0 && errno != ENOENT) return -errno; return 0; } source = "../usr/share/zoneinfo/UTC"; } else { p = path_join("../usr/share/zoneinfo", c->zone); if (!p) return -ENOMEM; source = p; } return symlink_atomic(source, "/etc/localtime"); } static int context_write_data_local_rtc(Context *c) { _cleanup_free_ char *s = NULL, *w = NULL; int r; 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; *mempcpy_typesafe(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; } } r = mac_init(); if (r < 0) return r; return write_string_file("/etc/adjtime", w, WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC|WRITE_STRING_FILE_LABEL); } 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) }, {} }; 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_unit_error_errno(u, 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 = ASSERT_PTR(userdata); const char *path; unsigned n = 0; int r; 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) { sd_bus_message *cm; c->slot_job_removed = sd_bus_slot_unref(c->slot_job_removed); (void) sd_bus_emit_properties_changed(sd_bus_message_get_bus(m), "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "NTP", NULL); while ((cm = set_steal_first(c->set_ntp_calls))) { r = sd_bus_reply_method_return(cm, NULL); if (r < 0) log_debug_errno(r, "Failed to reply to SetNTP method call, ignoring: %m"); sd_bus_message_unref(cm); } } 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 = bus_call_method( bus, bus_systemd_mgr, start ? "StartUnit" : "StopUnit", error, &reply, "ss", u->name, "replace"); log_unit_full_errno_zerook(u, r < 0 ? LOG_WARNING : LOG_DEBUG, r, "%s unit: %m", start ? "Starting" : "Stopping"); 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) { log_unit_debug(u, "already %sd.", enable_disable(enable)); return 0; } log_unit_info(u, "%s unit.", enable ? "Enabling" : "Disabling"); if (enable) r = bus_call_method( bus, bus_systemd_mgr, "EnableUnitFiles", error, NULL, "asbb", 1, u->name, false, true); else r = bus_call_method( bus, bus_systemd_mgr, "DisableUnitFiles", error, NULL, "asb", 1, u->name, false); if (r < 0) return r; r = bus_service_manager_reload(bus); if (r < 0) return r; return 0; } static bool ntp_synced(void) { struct timex txc = {}; if (adjtimex(&txc) < 0) return false; /* Consider the system clock synchronized if the reported maximum error is smaller than the maximum * value (16 seconds). Ignore the STA_UNSYNC flag as it may have been set to prevent the kernel from * touching the RTC. */ return txc.maxerror < 16000000; } 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 = 0; int r; r = hwclock_get(&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."); else if (r == -ENOENT) log_debug("/dev/rtc not found."); else if (r == -ENODATA) log_debug("/dev/rtc has no valid time, power loss probably occurred?"); else if (r < 0) return sd_bus_error_set_errnof(error, r, "Failed to read RTC: %m"); else { r = mktime_or_timegm_usec(&tm, /* utc= */ true, &t); if (r < 0) log_warning_errno(r, "Failed to convert RTC time to UNIX time, ignoring: %m"); } 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 = ASSERT_PTR(userdata); int r; 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 = ASSERT_PTR(userdata); int r; 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 = ASSERT_PTR(userdata); int interactive, r; const char *z; assert(m); 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 or not installed time zone '%s'", z); if (streq_ptr(z, c->zone)) return sd_bus_reply_method_return(m, NULL); r = bus_verify_polkit_async_full( m, "org.freedesktop.timedate1.set-timezone", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &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 tm tm; /* 4. Sync RTC from system clock, with the new delta */ r = localtime_or_gmtime_usec(now(CLOCK_REALTIME), /* utc= */ false, &tm); if (r < 0) log_debug_errno(r, "Failed to convert system time to calendar time, ignoring: %m"); else { r = hwclock_set(&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 = ASSERT_PTR(userdata); struct timespec ts; int r; assert(m); r = sd_bus_message_read(m, "bbb", &lrtc, &fix_system, &interactive); if (r < 0) return r; if (lrtc == c->local_rtc && !fix_system) return sd_bus_reply_method_return(m, NULL); r = bus_verify_polkit_async_full( m, "org.freedesktop.timedate1.set-local-rtc", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &c->polkit_registry, error); if (r < 0) return r; if (r == 0) return 1; if (lrtc != c->local_rtc) { 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 %s: %m", lrtc ? "local" : "UTC"); return sd_bus_error_set_errnof(error, r, "Failed to set RTC to %s: %m", lrtc ? "local" : "UTC"); } } /* 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 = { .tm_isdst = -1, }; /* Sync system clock from RTC; first, initialize the timezone fields of struct tm. */ r = localtime_or_gmtime_usec(timespec_load(&ts), !c->local_rtc, &tm); if (r < 0) log_debug_errno(r, "Failed to determine current timezone, ignoring: %m"); /* Override the main fields of struct tm, but not the timezone fields */ r = hwclock_get(&tm); if (r < 0) log_debug_errno(r, "Failed to get hardware clock, ignoring: %m"); else { usec_t t; /* And set the system clock with this */ r = mktime_or_timegm_usec(&tm, !c->local_rtc, &t); if (r < 0) log_debug_errno(r, "Failed to convert calendar time to system time, ignoring: %m"); else { /* We leave the subsecond offset as is! */ ts.tv_sec = t / USEC_PER_SEC; 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 */ r = localtime_or_gmtime_usec(timespec_load(&ts), !c->local_rtc, &tm); if (r < 0) log_debug_errno(r, "Failed to convert time to calendar time, ignoring: %m"); else { r = hwclock_set(&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 = ASSERT_PTR(userdata); int64_t utc; struct timespec ts; usec_t start; struct tm tm; assert(m); 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_full( m, "org.freedesktop.timedate1.set-time", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &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 */ r = localtime_or_gmtime_usec(timespec_load(&ts), !c->local_rtc, &tm); if (r < 0) log_debug_errno(r, "Failed to convert timestamp to calendar time, ignoring: %m"); else { r = hwclock_set(&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", strnull(FORMAT_TIMESTAMP(timespec_load(&ts))))); 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 = ASSERT_PTR(userdata); const UnitStatusInfo *selected = NULL; int enable, interactive, q, r; assert(m); assert(bus); 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_full( m, "org.freedesktop.timedate1.set-ntp", /* details= */ NULL, /* good_user= */ UID_INVALID, interactive ? POLKIT_ALLOW_INTERACTIVE : 0, &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 (set_size(c->set_ntp_calls) >= SET_NTP_IN_FLIGHT_MAX) return sd_bus_error_set_errnof(error, EAGAIN, "Too many calls in flight."); if (!c->slot_job_removed) { r = bus_match_signal_async( bus, &slot, bus_systemd_mgr, "JobRemoved", match_job_removed, NULL, c); if (r < 0) return r; } if (enable) LIST_FOREACH(units, u, c->units) { bool enable_this_one = !selected; if (!streq(u->load_state, "loaded")) continue; r = unit_enable_or_disable(u, bus, error, enable_this_one); if (r < 0) /* If enablement failed, don't start this unit. */ enable_this_one = false; r = unit_start_or_stop(u, bus, error, enable_this_one); if (r < 0) log_unit_warning_errno(u, r, "Failed to %s %sd NTP unit, ignoring: %m", enable_this_one ? "start" : "stop", enable_disable(enable_this_one)); if (enable_this_one) selected = u; } else LIST_FOREACH(units, u, c->units) { if (!streq(u->load_state, "loaded")) continue; q = unit_enable_or_disable(u, bus, error, false); if (q < 0) r = q; q = unit_start_or_stop(u, bus, error, false); if (q < 0) r = q; } if (r < 0) return r; if (enable && !selected) return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "No NTP service found to enable."); if (slot) c->slot_job_removed = TAKE_PTR(slot); if (selected) log_info("Set NTP to be enabled (%s).", selected->name); else log_info("Set NTP to be disabled."); /* Asynchronous reply to m in match_job_removed() */ return set_ensure_consume(&c->set_ntp_calls, &bus_message_hash_ops, sd_bus_message_ref(m)); } 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_WITH_ARGS("SetTime", SD_BUS_ARGS("x", usec_utc, "b", relative, "b", interactive), SD_BUS_NO_RESULT, method_set_time, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetTimezone", SD_BUS_ARGS("s", timezone, "b", interactive), SD_BUS_NO_RESULT, method_set_timezone, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetLocalRTC", SD_BUS_ARGS("b", local_rtc, "b", fix_system, "b", interactive), SD_BUS_NO_RESULT, method_set_local_rtc, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("SetNTP", SD_BUS_ARGS("b", use_ntp, "b", interactive), SD_BUS_NO_RESULT, method_set_ntp, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD_WITH_ARGS("ListTimezones", SD_BUS_NO_ARGS, SD_BUS_RESULT("as", timezones), method_list_timezones, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_VTABLE_END, }; const BusObjectImplementation manager_object = { "/org/freedesktop/timedate1", "org.freedesktop.timedate1", .vtables = BUS_VTABLES(timedate_vtable), }; 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 = bus_add_implementation(bus, &manager_object, c); if (r < 0) return r; r = bus_log_control_api_register(bus); if (r < 0) return r; 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 bool context_check_idle(void *userdata) { Context *c = ASSERT_PTR(userdata); return hashmap_isempty(c->polkit_registry); } 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(); r = service_parse_argv("systemd-timedated.service", "Manage the system clock and timezone and NTP enablement.", BUS_IMPLEMENTATIONS(&manager_object, &log_control_object), argc, argv); if (r <= 0) return r; umask(0022); 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_set_signal_exit(event, true); if (r < 0) return log_error_errno(r, "Failed to install SIGINT/SIGTERM handlers: %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 = sd_notify(false, NOTIFY_READY); if (r < 0) log_warning_errno(r, "Failed to send readiness notification, ignoring: %m"); r = bus_event_loop_with_idle( event, bus, "org.freedesktop.timedate1", DEFAULT_EXIT_USEC, context_check_idle, &context); if (r < 0) return log_error_errno(r, "Failed to run event loop: %m"); return 0; } DEFINE_MAIN_FUNCTION(run);