| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| |
| #include <errno.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #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-polkit.h" |
| #include "clock-util.h" |
| #include "conf-files.h" |
| #include "def.h" |
| #include "fd-util.h" |
| #include "fileio-label.h" |
| #include "fileio.h" |
| #include "fs-util.h" |
| #include "hashmap.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 "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") |
| |
| 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; |
| |
| #define log_unit_full(unit, level, error, ...) \ |
| ({ \ |
| const UnitStatusInfo *_u = (unit); \ |
| log_object_internal(level, error, PROJECT_FILE, __LINE__, __func__, \ |
| "UNIT=", _u->name, NULL, NULL, ##__VA_ARGS__); \ |
| }) |
| |
| #define log_unit_debug(unit, ...) log_unit_full(unit, LOG_DEBUG, 0, ##__VA_ARGS__) |
| #define log_unit_info(unit, ...) log_unit_full(unit, LOG_INFO, 0, ##__VA_ARGS__) |
| #define log_unit_notice(unit, ...) log_unit_full(unit, LOG_NOTICE, 0, ##__VA_ARGS__) |
| #define log_unit_warning(unit, ...) log_unit_full(unit, LOG_WARNING, 0, ##__VA_ARGS__) |
| #define log_unit_error(unit, ...) log_unit_full(unit, LOG_ERR, 0, ##__VA_ARGS__) |
| |
| #define log_unit_debug_errno(unit, error, ...) log_unit_full(unit, LOG_DEBUG, error, ##__VA_ARGS__) |
| #define log_unit_info_errno(unit, error, ...) log_unit_full(unit, LOG_INFO, error, ##__VA_ARGS__) |
| #define log_unit_notice_errno(unit, error, ...) log_unit_full(unit, LOG_NOTICE, error, ##__VA_ARGS__) |
| #define log_unit_warning_errno(unit, error, ...) log_unit_full(unit, LOG_WARNING, error, ##__VA_ARGS__) |
| #define log_unit_error_errno(unit, error, ...) log_unit_full(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 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, const char *source) { |
| 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); |
| log_unit_debug(u, "added from %s.", source); |
| |
| 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; |
| char **f; |
| 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; |
| const char *word; |
| |
| r = read_line(file, LINE_MAX, &line); |
| if (r < 0) { |
| log_error_errno(r, "Failed to read %s, ignoring: %m", *f); |
| continue; |
| } |
| if (r == 0) |
| break; |
| |
| word = strstrip(line); |
| if (isempty(word) || startswith("#", word)) |
| continue; |
| |
| r = context_add_ntp_service(c, word, *f); |
| if (r < 0) |
| log_warning_errno(r, "Failed to add NTP service \"%s\", ignoring: %m", word); |
| } |
| } |
| |
| 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) { |
| 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_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; |
| 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; |
| |
| *(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_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 = 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) { |
| 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); |
| } |
| |
| 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"); |
| log_unit_full(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 = 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 = 0; |
| int r; |
| |
| 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."); |
| else if (r == -ENOENT) |
| log_debug("/dev/rtc not 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 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( |
| 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 %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; |
| |
| /* 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; |
| const UnitStatusInfo *selected = NULL; |
| 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) { |
| 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 enabled (%s).", selected->name); |
| else |
| log_info("Set NTP to disabled."); |
| |
| 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); |