/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <string.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-util.h"
#include "clock-util.h"
#include "def.h"
#include "fileio-label.h"
#include "fs-util.h"
#include "hashmap.h"
#include "list.h"
#include "path-util.h"
#include "selinux-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;
LIST_FIELDS(struct UnitStatusInfo, units);
} UnitStatusInfo;
typedef struct Context {
char *zone;
bool local_rtc;
Hashmap *polkit_registry;
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);
}
static void context_free(Context *c) {
UnitStatusInfo *p;
assert(c);
free(c->zone);
bus_verify_polkit_async_registry_free(c->polkit_registry);
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 += streq_ptr(info->active_state, "active");
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, "enabled", "enabled-runtime");
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) },
{}
};
static sd_bus_message *_m = NULL;
UnitStatusInfo *u;
int r;
assert(c);
assert(bus);
/* Suppress multiple call of context_update_ntp_status() within single DBus transaction. */
if (m && m == _m)
return 0;
_m = 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 unit_start_or_stop(UnitStatusInfo *u, sd_bus *bus, sd_bus_error *error, bool start) {
int r;
assert(u);
assert(bus);
assert(error);
/* Call context_update_ntp_status() to update UnitStatusInfo before calling this. */
if (streq(u->active_state, "active") == start)
return 0;
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
start ? "StartUnit" : "StopUnit",
error,
NULL,
"ss",
u->name,
"replace");
if (r < 0)
return r;
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);
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);
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(tm = localtime(&ts.tv_sec));
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)
tm = *localtime(&ts.tv_sec);
else
tm = *gmtime(&ts.tv_sec);
/* 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)
tm = localtime(&ts.tv_sec);
else
tm = gmtime(&ts.tv_sec);
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);
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)
tm = localtime(&ts.tv_sec);
else
tm = gmtime(&ts.tv_sec);
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) {
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;
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 if (context_ntp_service_is_active(c) <= 0)
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;
log_info("Set NTP to %sd", enable_disable(enable));
(void) sd_bus_emit_properties_changed(bus, "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "NTP", NULL);
return sd_bus_reply_method_return(m, 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_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;
}
int main(int argc, char *argv[]) {
Context context = {};
_cleanup_(sd_event_unrefp) sd_event *event = NULL;
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
if (argc != 1) {
log_error("This program takes no arguments.");
r = -EINVAL;
goto finish;
}
r = sd_event_default(&event);
if (r < 0) {
log_error_errno(r, "Failed to allocate event loop: %m");
goto finish;
}
sd_event_set_watchdog(event, true);
r = connect_bus(&context, event, &bus);
if (r < 0)
goto finish;
(void) sd_bus_negotiate_timestamp(bus, true);
r = context_read_data(&context);
if (r < 0) {
log_error_errno(r, "Failed to read time zone data: %m");
goto finish;
}
r = context_parse_ntp_services(&context);
if (r < 0)
goto finish;
r = bus_event_loop_with_idle(event, bus, "org.freedesktop.timedate1", DEFAULT_EXIT_USEC, NULL, NULL);
if (r < 0) {
log_error_errno(r, "Failed to run event loop: %m");
goto finish;
}
finish:
context_free(&context);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}