Systemd/src/timedate/timedated.c

1043 lines
35 KiB
C

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <dbus/dbus.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include "systemd/sd-id128.h"
#include "systemd/sd-messages.h"
#include "util.h"
#include "strv.h"
#include "dbus-common.h"
#include "polkit.h"
#include "def.h"
#include "hwclock.h"
#include "conf-files.h"
#include "path-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 INTERFACE \
" <interface name=\"org.freedesktop.timedate1\">\n" \
" <property name=\"Timezone\" type=\"s\" access=\"read\"/>\n" \
" <property name=\"LocalRTC\" type=\"b\" access=\"read\"/>\n" \
" <property name=\"NTP\" type=\"b\" access=\"read\"/>\n" \
" <method name=\"SetTime\">\n" \
" <arg name=\"usec_utc\" type=\"x\" direction=\"in\"/>\n" \
" <arg name=\"relative\" type=\"b\" direction=\"in\"/>\n" \
" <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
" </method>\n" \
" <method name=\"SetTimezone\">\n" \
" <arg name=\"timezone\" type=\"s\" direction=\"in\"/>\n" \
" <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
" </method>\n" \
" <method name=\"SetLocalRTC\">\n" \
" <arg name=\"local_rtc\" type=\"b\" direction=\"in\"/>\n" \
" <arg name=\"fix_system\" type=\"b\" direction=\"in\"/>\n" \
" <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
" </method>\n" \
" <method name=\"SetNTP\">\n" \
" <arg name=\"use_ntp\" type=\"b\" direction=\"in\"/>\n" \
" <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
" </method>\n" \
" </interface>\n"
#define INTROSPECTION \
DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
"<node>\n" \
INTERFACE \
BUS_PROPERTIES_INTERFACE \
BUS_INTROSPECTABLE_INTERFACE \
BUS_PEER_INTERFACE \
"</node>\n"
#define INTERFACES_LIST \
BUS_GENERIC_INTERFACES_LIST \
"org.freedesktop.timedate1\0"
const char timedate_interface[] _introspect_("timedate1") = INTERFACE;
typedef struct TZ {
char *zone;
bool local_rtc;
int use_ntp;
} TZ;
static TZ tz = {
.use_ntp = -1,
};
static usec_t remain_until;
static void free_data(void) {
free(tz.zone);
tz.zone = NULL;
tz.local_rtc = false;
}
static bool valid_timezone(const char *name) {
const char *p;
char *t;
bool slash = false;
int r;
struct stat st;
assert(name);
if (*name == '/' || *name == 0)
return false;
for (p = name; *p; p++) {
if (!(*p >= '0' && *p <= '9') &&
!(*p >= 'a' && *p <= 'z') &&
!(*p >= 'A' && *p <= 'Z') &&
!(*p == '-' || *p == '_' || *p == '+' || *p == '/'))
return false;
if (*p == '/') {
if (slash)
return false;
slash = true;
} else
slash = false;
}
if (slash)
return false;
t = strappend("/usr/share/zoneinfo/", name);
if (!t)
return false;
r = stat(t, &st);
free(t);
if (r < 0)
return false;
if (!S_ISREG(st.st_mode))
return false;
return true;
}
static int read_data(void) {
int r;
_cleanup_free_ char *t = NULL;
free_data();
r = readlink_malloc("/etc/localtime", &t);
if (r < 0) {
if (r == -EINVAL)
log_warning("/etc/localtime should be a symbolic link to a timezone data file in /usr/share/zoneinfo/.");
else
log_warning("Failed to get target of /etc/localtime: %s", strerror(-r));
} else {
const char *e;
e = path_startswith(t, "/usr/share/zoneinfo/");
if (!e)
e = path_startswith(t, "../usr/share/zoneinfo/");
if (!e)
log_warning("/etc/localtime should be a symbolic link to a timezone data file in /usr/share/zoneinfo/.");
else {
tz.zone = strdup(e);
if (!tz.zone)
return log_oom();
goto have_timezone;
}
}
#ifdef HAVE_DEBIAN
r = read_one_line_file("/etc/timezone", &tz.zone);
if (r < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/timezone: %s", strerror(-r));
}
#endif
have_timezone:
if (isempty(tz.zone)) {
free(tz.zone);
tz.zone = NULL;
}
tz.local_rtc = hwclock_is_localtime() > 0;
return 0;
}
static int write_data_timezone(void) {
int r = 0;
_cleanup_free_ char *p = NULL;
#ifdef TARGET_DEBIAN
struct stat st;
#endif
if (!tz.zone) {
if (unlink("/etc/localtime") < 0 && errno != ENOENT)
r = -errno;
#ifdef TARGET_DEBIAN
if (unlink("/etc/timezone") < 0 && errno != ENOENT)
r = -errno;
#endif
return r;
}
p = strappend("../usr/share/zoneinfo/", tz.zone);
if (!p)
return log_oom();
r = symlink_atomic(p, "/etc/localtime");
if (r < 0)
return r;
#ifdef TARGET_DEBIAN
if (stat("/etc/timezone", &st) == 0 && S_ISREG(st.st_mode)) {
r = write_one_line_file_atomic("/etc/timezone", tz.zone);
if (r < 0)
return r;
}
#endif
return 0;
}
static int write_data_local_rtc(void) {
int r;
char *s, *w;
r = read_full_file("/etc/adjtime", &s, NULL);
if (r < 0) {
if (r != -ENOENT)
return r;
if (!tz.local_rtc)
return 0;
w = strdup(NULL_ADJTIME_LOCAL);
if (!w)
return -ENOMEM;
} else {
char *p, *e;
size_t a, b;
p = strchr(s, '\n');
if (!p) {
free(s);
return -EIO;
}
p = strchr(p+1, '\n');
if (!p) {
free(s);
return -EIO;
}
p++;
e = strchr(p, '\n');
if (!e) {
free(s);
return -EIO;
}
a = p - s;
b = strlen(e);
w = new(char, a + (tz.local_rtc ? 5 : 3) + b + 1);
if (!w) {
free(s);
return -ENOMEM;
}
*(char*) mempcpy(stpcpy(mempcpy(w, s, a), tz.local_rtc ? "LOCAL" : "UTC"), e, b) = 0;
if (streq(w, NULL_ADJTIME_UTC)) {
free(w);
if (unlink("/etc/adjtime") < 0) {
if (errno != ENOENT)
return -errno;
}
return 0;
}
}
r = write_one_line_file_atomic("/etc/adjtime", w);
free(w);
return r;
}
static char** get_ntp_services(void) {
char **r = NULL, **files, **i;
int k;
k = conf_files_list(&files, ".list",
"/etc/systemd/ntp-units.d",
"/run/systemd/ntp-units.d",
"/usr/local/lib/systemd/ntp-units.d",
"/usr/lib/systemd/ntp-units.d",
NULL);
if (k < 0)
return NULL;
STRV_FOREACH(i, files) {
FILE *f;
f = fopen(*i, "re");
if (!f)
continue;
for (;;) {
char line[PATH_MAX], *l, **q;
if (!fgets(line, sizeof(line), f)) {
if (ferror(f))
log_error("Failed to read NTP units file: %m");
break;
}
l = strstrip(line);
if (l[0] == 0 || l[0] == '#')
continue;
q = strv_append(r, l);
if (!q) {
log_oom();
break;
}
strv_free(r);
r = q;
}
fclose(f);
}
strv_free(files);
return strv_uniq(r);
}
static int read_ntp(DBusConnection *bus) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
int r;
char **i, **l;
assert(bus);
dbus_error_init(&error);
l = get_ntp_services();
STRV_FOREACH(i, l) {
const char *s;
if (m)
dbus_message_unref(m);
m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"GetUnitFileState");
if (!m) {
r = log_oom();
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, i,
DBUS_TYPE_INVALID)) {
r = log_oom();
goto finish;
}
if (reply)
dbus_message_unref(reply);
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
if (!reply) {
if (streq(error.name, "org.freedesktop.DBus.Error.FileNotFound")) {
/* This implementation does not exist, try next one */
dbus_error_free(&error);
continue;
}
log_error("Failed to issue method call: %s", bus_error_message(&error));
r = -EIO;
goto finish;
}
if (!dbus_message_get_args(reply, &error,
DBUS_TYPE_STRING, &s,
DBUS_TYPE_INVALID)) {
log_error("Failed to parse reply: %s", bus_error_message(&error));
r = -EIO;
goto finish;
}
tz.use_ntp =
streq(s, "enabled") ||
streq(s, "enabled-runtime");
r = 0;
goto finish;
}
/* NTP is not installed. */
tz.use_ntp = 0;
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
strv_free(l);
dbus_error_free(&error);
return r;
}
static int start_ntp(DBusConnection *bus, DBusError *error) {
DBusMessage *m = NULL, *reply = NULL;
const char *mode = "replace";
char **i, **l;
int r;
assert(bus);
assert(error);
l = get_ntp_services();
STRV_FOREACH(i, l) {
if (m)
dbus_message_unref(m);
m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
tz.use_ntp ? "StartUnit" : "StopUnit");
if (!m) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, i,
DBUS_TYPE_STRING, &mode,
DBUS_TYPE_INVALID)) {
log_error("Could not append arguments to message.");
r = -ENOMEM;
goto finish;
}
if (reply)
dbus_message_unref(reply);
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error);
if (!reply) {
if (streq(error->name, "org.freedesktop.DBus.Error.FileNotFound") ||
streq(error->name, "org.freedesktop.systemd1.LoadFailed") ||
streq(error->name, "org.freedesktop.systemd1.NoSuchUnit")) {
/* This implementation does not exist, try next one */
dbus_error_free(error);
continue;
}
log_error("Failed to issue method call: %s", bus_error_message(error));
r = -EIO;
goto finish;
}
r = 0;
goto finish;
}
/* No implementaiton available... */
r = -ENOENT;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
strv_free(l);
return r;
}
static int enable_ntp(DBusConnection *bus, DBusError *error) {
DBusMessage *m = NULL, *reply = NULL;
int r;
DBusMessageIter iter;
dbus_bool_t f = FALSE, t = TRUE;
char **i, **l;
assert(bus);
assert(error);
l = get_ntp_services();
STRV_FOREACH(i, l) {
char* k[2];
if (m)
dbus_message_unref(m);
m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
tz.use_ntp ? "EnableUnitFiles" : "DisableUnitFiles");
if (!m) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
dbus_message_iter_init_append(m, &iter);
k[0] = *i;
k[1] = NULL;
r = bus_append_strv_iter(&iter, k);
if (r < 0) {
log_error("Failed to append unit files.");
goto finish;
}
/* send runtime bool */
if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &f)) {
log_error("Failed to append runtime boolean.");
r = -ENOMEM;
goto finish;
}
if (tz.use_ntp) {
/* send force bool */
if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &t)) {
log_error("Failed to append force boolean.");
r = -ENOMEM;
goto finish;
}
}
if (reply)
dbus_message_unref(reply);
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error);
if (!reply) {
if (streq(error->name, "org.freedesktop.DBus.Error.FileNotFound")) {
/* This implementation does not exist, try next one */
dbus_error_free(error);
continue;
}
log_error("Failed to issue method call: %s", bus_error_message(error));
r = -EIO;
goto finish;
}
dbus_message_unref(m);
m = dbus_message_new_method_call(
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"Reload");
if (!m) {
log_error("Could not allocate message.");
r = -ENOMEM;
goto finish;
}
dbus_message_unref(reply);
reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error);
if (!reply) {
log_error("Failed to issue method call: %s", bus_error_message(error));
r = -EIO;
goto finish;
}
r = 0;
goto finish;
}
r = -ENOENT;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
strv_free(l);
return r;
}
static int property_append_ntp(DBusMessageIter *i, const char *property, void *data) {
dbus_bool_t db;
assert(i);
assert(property);
db = tz.use_ntp > 0;
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db))
return -ENOMEM;
return 0;
}
static const BusProperty bus_timedate_properties[] = {
{ "Timezone", bus_property_append_string, "s", offsetof(TZ, zone), true },
{ "LocalRTC", bus_property_append_bool, "b", offsetof(TZ, local_rtc) },
{ "NTP", property_append_ntp, "b", offsetof(TZ, use_ntp) },
{ NULL, }
};
static const BusBoundProperties bps[] = {
{ "org.freedesktop.timedate1", bus_timedate_properties, &tz },
{ NULL, }
};
static DBusHandlerResult timedate_message_handler(
DBusConnection *connection,
DBusMessage *message,
void *userdata) {
DBusMessage *reply = NULL, *changed = NULL;
DBusError error;
int r;
assert(connection);
assert(message);
dbus_error_init(&error);
if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetTimezone")) {
const char *z;
dbus_bool_t interactive;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_STRING, &z,
DBUS_TYPE_BOOLEAN, &interactive,
DBUS_TYPE_INVALID))
return bus_send_error_reply(connection, message, &error, -EINVAL);
if (!valid_timezone(z))
return bus_send_error_reply(connection, message, NULL, -EINVAL);
if (!streq_ptr(z, tz.zone)) {
char *t;
r = verify_polkit(connection, message, "org.freedesktop.timedate1.set-timezone", interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
t = strdup(z);
if (!t)
goto oom;
free(tz.zone);
tz.zone = t;
/* 1. Write new configuration file */
r = write_data_timezone();
if (r < 0) {
log_error("Failed to set timezone: %s", strerror(-r));
return bus_send_error_reply(connection, message, NULL, r);
}
/* 2. Tell the kernel our time zone */
hwclock_set_timezone(NULL);
if (tz.local_rtc) {
struct timespec ts;
struct tm *tm;
/* 3. Sync RTC from system clock, with the new delta */
assert_se(clock_gettime(CLOCK_REALTIME, &ts) == 0);
assert_se(tm = localtime(&ts.tv_sec));
hwclock_set_time(tm);
}
log_struct(LOG_INFO,
MESSAGE_ID(SD_MESSAGE_TIMEZONE_CHANGE),
"TIMEZONE=%s", tz.zone,
"MESSAGE=Changed timezone to '%s'.", tz.zone,
NULL);
changed = bus_properties_changed_new(
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"Timezone\0");
if (!changed)
goto oom;
}
} else if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetLocalRTC")) {
dbus_bool_t lrtc;
dbus_bool_t fix_system;
dbus_bool_t interactive;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_BOOLEAN, &lrtc,
DBUS_TYPE_BOOLEAN, &fix_system,
DBUS_TYPE_BOOLEAN, &interactive,
DBUS_TYPE_INVALID))
return bus_send_error_reply(connection, message, &error, -EINVAL);
if (lrtc != tz.local_rtc) {
struct timespec ts;
r = verify_polkit(connection, message, "org.freedesktop.timedate1.set-local-rtc", interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
tz.local_rtc = lrtc;
/* 1. Write new configuration file */
r = write_data_local_rtc();
if (r < 0) {
log_error("Failed to set RTC to local/UTC: %s", strerror(-r));
return bus_send_error_reply(connection, message, NULL, r);
}
/* 2. Tell the kernel our time zone */
hwclock_set_timezone(NULL);
/* 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 (tz.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 */
if (hwclock_get_time(&tm) >= 0) {
/* And set the system clock
* with this */
if (tz.local_rtc)
ts.tv_sec = mktime(&tm);
else
ts.tv_sec = timegm(&tm);
clock_settime(CLOCK_REALTIME, &ts);
}
} else {
struct tm *tm;
/* Sync RTC from system clock */
if (tz.local_rtc)
tm = localtime(&ts.tv_sec);
else
tm = gmtime(&ts.tv_sec);
hwclock_set_time(tm);
}
log_info("RTC configured to %s time.", tz.local_rtc ? "local" : "UTC");
changed = bus_properties_changed_new(
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"LocalRTC\0");
if (!changed)
goto oom;
}
} else if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetTime")) {
int64_t utc;
dbus_bool_t relative;
dbus_bool_t interactive;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_INT64, &utc,
DBUS_TYPE_BOOLEAN, &relative,
DBUS_TYPE_BOOLEAN, &interactive,
DBUS_TYPE_INVALID))
return bus_send_error_reply(connection, message, &error, -EINVAL);
if (!relative && utc <= 0)
return bus_send_error_reply(connection, message, NULL, -EINVAL);
if (!relative || utc != 0) {
struct timespec ts;
struct tm* tm;
r = verify_polkit(connection, message, "org.freedesktop.timedate1.set-time", interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
if (relative)
timespec_store(&ts, now(CLOCK_REALTIME) + utc);
else
timespec_store(&ts, utc);
/* Set system clock */
if (clock_settime(CLOCK_REALTIME, &ts) < 0) {
log_error("Failed to set local time: %m");
return bus_send_error_reply(connection, message, NULL, -errno);
}
/* Sync down to RTC */
if (tz.local_rtc)
tm = localtime(&ts.tv_sec);
else
tm = gmtime(&ts.tv_sec);
hwclock_set_time(tm);
log_struct(LOG_INFO,
MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
"REALTIME=%llu", (unsigned long long) timespec_load(&ts),
"MESSAGE=Changed local time to %s", ctime(&ts.tv_sec),
NULL);
}
} else if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetNTP")) {
dbus_bool_t ntp;
dbus_bool_t interactive;
if (!dbus_message_get_args(
message,
&error,
DBUS_TYPE_BOOLEAN, &ntp,
DBUS_TYPE_BOOLEAN, &interactive,
DBUS_TYPE_INVALID))
return bus_send_error_reply(connection, message, &error, -EINVAL);
if (ntp != !!tz.use_ntp) {
r = verify_polkit(connection, message, "org.freedesktop.timedate1.set-ntp", interactive, NULL, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
tz.use_ntp = !!ntp;
r = enable_ntp(connection, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
r = start_ntp(connection, &error);
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
log_info("Set NTP to %s", tz.use_ntp ? "enabled" : "disabled");
changed = bus_properties_changed_new(
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"NTP\0");
if (!changed)
goto oom;
}
} else
return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps);
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
if (!dbus_connection_send(connection, reply, NULL))
goto oom;
dbus_message_unref(reply);
reply = NULL;
if (changed) {
if (!dbus_connection_send(connection, changed, NULL))
goto oom;
dbus_message_unref(changed);
}
return DBUS_HANDLER_RESULT_HANDLED;
oom:
if (reply)
dbus_message_unref(reply);
if (changed)
dbus_message_unref(changed);
dbus_error_free(&error);
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
static int connect_bus(DBusConnection **_bus) {
static const DBusObjectPathVTable timedate_vtable = {
.message_function = timedate_message_handler
};
DBusError error;
DBusConnection *bus = NULL;
int r;
assert(_bus);
dbus_error_init(&error);
bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
if (!bus) {
log_error("Failed to get system D-Bus connection: %s", bus_error_message(&error));
r = -ECONNREFUSED;
goto fail2;
}
dbus_connection_set_exit_on_disconnect(bus, FALSE);
if (!dbus_connection_register_object_path(bus, "/org/freedesktop/timedate1", &timedate_vtable, NULL) ||
!dbus_connection_add_filter(bus, bus_exit_idle_filter, &remain_until, NULL)) {
r = log_oom();
goto fail;
}
r = dbus_bus_request_name(bus, "org.freedesktop.timedate1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error);
if (dbus_error_is_set(&error)) {
log_error("Failed to register name on bus: %s", bus_error_message(&error));
r = -EEXIST;
goto fail;
}
if (r != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER) {
log_error("Failed to acquire name.");
r = -EEXIST;
goto fail;
}
if (_bus)
*_bus = bus;
return 0;
fail:
dbus_connection_close(bus);
dbus_connection_unref(bus);
fail2:
dbus_error_free(&error);
return r;
}
int main(int argc, char *argv[]) {
int r;
DBusConnection *bus = NULL;
bool exiting = false;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
umask(0022);
if (argc == 2 && streq(argv[1], "--introspect")) {
fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
"<node>\n", stdout);
fputs(timedate_interface, stdout);
fputs("</node>\n", stdout);
return 0;
}
if (argc != 1) {
log_error("This program takes no arguments.");
r = -EINVAL;
goto finish;
}
r = read_data();
if (r < 0) {
log_error("Failed to read timezone data: %s", strerror(-r));
goto finish;
}
r = connect_bus(&bus);
if (r < 0)
goto finish;
r = read_ntp(bus);
if (r < 0) {
log_error("Failed to determine whether NTP is enabled: %s", strerror(-r));
goto finish;
}
remain_until = now(CLOCK_MONOTONIC) + DEFAULT_EXIT_USEC;
for (;;) {
if (!dbus_connection_read_write_dispatch(bus, exiting ? -1 : (int) (DEFAULT_EXIT_USEC/USEC_PER_MSEC)))
break;
if (!exiting && remain_until < now(CLOCK_MONOTONIC)) {
exiting = true;
bus_async_unregister_and_exit(bus, "org.freedesktop.timedated1");
}
}
r = 0;
finish:
free_data();
if (bus) {
dbus_connection_flush(bus);
dbus_connection_close(bus);
dbus_connection_unref(bus);
}
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}