#include <errno.h>

#include <sys/stat.h>

#include <sys/timex.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-get-properties.h"

#include "bus-locator.h"

#include "bus-log-control-api.h"

#include "bus-map-properties.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 "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")

typedef struct UnitStatusInfo {

} UnitStatusInfo;

typedef struct Context {

} 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) {

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) {

_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;

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) {

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

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;

}

}

r = mac_selinux_init();

if (r < 0)

return r;

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) },

{}

};

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;

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 = 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_call_method(bus, bus_systemd_mgr, "Reload", error, NULL, NULL);

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

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_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_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_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 && !fix_system)

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;

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;

/* Sync system clock from RTC; first, initialize the timezone fields of struct tm. */

localtime_or_gmtime_r(&ts.tv_sec, &tm, !c->local_rtc);

/* 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 */

ts.tv_sec = mktime_or_timegm(&tm, !c->local_rtc);

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 */

localtime_or_gmtime_r(&ts.tv_sec, &tm, !c->local_rtc);

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);

char buf[FORMAT_TIMESTAMP_MAX];

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 */

localtime_or_gmtime_r(&ts.tv_sec, &tm, !c->local_rtc);

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", strnull(format_timestamp(buf, sizeof(buf), 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 = userdata;

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 = 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;