+++ /dev/null
-/*-*- 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 <errno.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "sd-messages.h"
-#include "sd-event.h"
-#include "sd-bus.h"
-
-#include "util.h"
-#include "strv.h"
-#include "def.h"
-#include "clock-util.h"
-#include "path-util.h"
-#include "fileio-label.h"
-#include "bus-util.h"
-#include "bus-error.h"
-#include "bus-common-errors.h"
-#include "event-util.h"
-#include "selinux-util.h"
-
-#define NULL_ADJTIME_UTC "0.0 0 0\n0\nUTC\n"
-#define NULL_ADJTIME_LOCAL "0.0 0 0\n0\nLOCAL\n"
-
-static BUS_ERROR_MAP_ELF_REGISTER const sd_bus_error_map timedated_errors[] = {
- SD_BUS_ERROR_MAP("org.freedesktop.timedate1.NoNTPSupport", EOPNOTSUPP),
- SD_BUS_ERROR_MAP_END
-};
-
-typedef struct Context {
- char *zone;
- bool local_rtc;
- bool can_ntp;
- bool use_ntp;
- Hashmap *polkit_registry;
-} Context;
-
-static void context_free(Context *c) {
- assert(c);
-
- free(c->zone);
- bus_verify_polkit_async_registry_free(c->polkit_registry);
-}
-
-static int context_read_data(Context *c) {
- _cleanup_free_ char *t = NULL;
- int r;
-
- assert(c);
-
- r = readlink_malloc("/etc/localtime", &t);
- if (r < 0) {
- if (r == -EINVAL)
- log_warning("/etc/localtime should be a symbolic link to a time zone data file in /usr/share/zoneinfo/.");
- else
- log_warning_errno(r, "Failed to get target of /etc/localtime: %m");
- } 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 time zone data file in /usr/share/zoneinfo/.");
- else {
- c->zone = strdup(e);
- if (!c->zone)
- return log_oom();
-
- goto have_timezone;
- }
- }
-
-have_timezone:
- if (isempty(c->zone)) {
- free(c->zone);
- c->zone = NULL;
- }
-
- c->local_rtc = clock_is_localtime() > 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, *e;
- size_t a, b;
-
- p = strchr(s, '\n');
- if (!p)
- return -EIO;
-
- p = strchr(p+1, '\n');
- if (!p)
- return -EIO;
-
- p++;
- e = strchr(p, '\n');
- if (!e)
- return -EIO;
-
- a = p - s;
- b = strlen(e);
-
- w = new(char, a + (c->local_rtc ? 5 : 3) + b + 1);
- if (!w)
- return -ENOMEM;
-
- *(char*) mempcpy(stpcpy(mempcpy(w, s, a), 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("/etc");
- return write_string_file_atomic_label("/etc/adjtime", w);
-}
-
-static int context_read_ntp(Context *c, sd_bus *bus) {
- _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
- sd_bus_message *reply = NULL;
- const char *s;
- int r;
-
- assert(c);
- assert(bus);
-
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "GetUnitFileState",
- &error,
- &reply,
- "s",
- "systemd-timesyncd.service");
-
- if (r < 0) {
- if (sd_bus_error_has_name(&error, SD_BUS_ERROR_FILE_NOT_FOUND) ||
- sd_bus_error_has_name(&error, "org.freedesktop.systemd1.LoadFailed") ||
- sd_bus_error_has_name(&error, "org.freedesktop.systemd1.NoSuchUnit"))
- return 0;
-
- return r;
- }
-
- r = sd_bus_message_read(reply, "s", &s);
- if (r < 0)
- return r;
-
- c->can_ntp = true;
- c->use_ntp = STR_IN_SET(s, "enabled", "enabled-runtime");
-
- return 0;
-}
-
-static int context_start_ntp(sd_bus *bus, sd_bus_error *error, bool enabled) {
- int r;
-
- assert(bus);
- assert(error);
-
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- enabled ? "StartUnit" : "StopUnit",
- error,
- NULL,
- "ss",
- "systemd-timesyncd.service",
- "replace");
- if (r < 0) {
- if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND) ||
- sd_bus_error_has_name(error, "org.freedesktop.systemd1.LoadFailed") ||
- sd_bus_error_has_name(error, "org.freedesktop.systemd1.NoSuchUnit"))
- return sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported.");
-
- return r;
- }
-
- return 0;
-}
-
-static int context_enable_ntp(sd_bus *bus, sd_bus_error *error, bool enabled) {
- int r;
-
- assert(bus);
- assert(error);
-
- if (enabled)
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "EnableUnitFiles",
- error,
- NULL,
- "asbb", 1,
- "systemd-timesyncd.service",
- false, true);
- else
- r = sd_bus_call_method(
- bus,
- "org.freedesktop.systemd1",
- "/org/freedesktop/systemd1",
- "org.freedesktop.systemd1.Manager",
- "DisableUnitFiles",
- error,
- NULL,
- "asb", 1,
- "systemd-timesyncd.service",
- false);
-
- if (r < 0) {
- if (sd_bus_error_has_name(error, SD_BUS_ERROR_FILE_NOT_FOUND))
- return sd_bus_error_set_const(error, "org.freedesktop.timedate1.NoNTPSupport", "NTP not supported.");
-
- 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 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: %s", strerror(-r));
- else
- t = (usec_t) timegm(&tm) * USEC_PER_SEC;
-
- return sd_bus_message_append(reply, "t", t);
-}
-
-static int property_get_time(
- sd_bus *bus,
- const char *path,
- const char *interface,
- const char *property,
- sd_bus_message *reply,
- void *userdata,
- sd_bus_error *error) {
-
- return sd_bus_message_append(reply, "t", now(CLOCK_REALTIME));
-}
-
-static int property_get_ntp_sync(
- sd_bus *bus,
- const char *path,
- const char *interface,
- const char *property,
- sd_bus_message *reply,
- void *userdata,
- sd_bus_error *error) {
-
- return sd_bus_message_append(reply, "b", ntp_synced());
-}
-
-static int method_set_timezone(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
- Context *c = userdata;
- const char *z;
- int interactive;
- char *t;
- int r;
-
- assert(bus);
- assert(m);
- assert(c);
-
- r = sd_bus_message_read(m, "sb", &z, &interactive);
- if (r < 0)
- return r;
-
- if (!timezone_is_valid(z))
- 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",
- 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 */
-
- t = strdup(z);
- if (!t)
- return -ENOMEM;
-
- free(c->zone);
- c->zone = t;
-
- /* 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: %s", strerror(-r));
- }
-
- /* 2. Tell the kernel our timezone */
- clock_set_timezone(NULL);
-
- if (c->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));
- clock_set_hwclock(tm);
- }
-
- log_struct(LOG_INFO,
- LOG_MESSAGE_ID(SD_MESSAGE_TIMEZONE_CHANGE),
- "TIMEZONE=%s", c->zone,
- LOG_MESSAGE("Changed time zone to '%s'.", c->zone),
- NULL);
-
- sd_bus_emit_properties_changed(bus, "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "Timezone", NULL);
-
- return sd_bus_reply_method_return(m, NULL);
-}
-
-static int method_set_local_rtc(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
- int lrtc, fix_system, interactive;
- Context *c = userdata;
- struct timespec ts;
- int r;
-
- assert(bus);
- 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",
- 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: %s", strerror(-r));
- }
-
- /* 2. Tell the kernel our timezone */
- clock_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 (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 */
- if (clock_get_hwclock(&tm) >= 0) {
-
- /* And set the system clock
- * with this */
- if (c->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 (c->local_rtc)
- tm = localtime(&ts.tv_sec);
- else
- tm = gmtime(&ts.tv_sec);
-
- clock_set_hwclock(tm);
- }
-
- log_info("RTC configured to %s time.", c->local_rtc ? "local" : "UTC");
-
- sd_bus_emit_properties_changed(bus, "/org/freedesktop/timedate1", "org.freedesktop.timedate1", "LocalRTC", NULL);
-
- return sd_bus_reply_method_return(m, NULL);
-}
-
-static int method_set_time(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
- int relative, interactive;
- Context *c = userdata;
- int64_t utc;
- struct timespec ts;
- usec_t start;
- struct tm* tm;
- int r;
-
- assert(bus);
- assert(m);
- assert(c);
-
- if (c->use_ntp)
- return sd_bus_error_setf(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_setf(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_setf(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",
- 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);
- clock_set_hwclock(tm);
-
- log_struct(LOG_INFO,
- LOG_MESSAGE_ID(SD_MESSAGE_TIME_CHANGE),
- "REALTIME="USEC_FMT, timespec_load(&ts),
- LOG_MESSAGE("Changed local time to %s", ctime(&ts.tv_sec)),
- NULL);
-
- return sd_bus_reply_method_return(m, NULL);
-}
-
-static int method_set_ntp(sd_bus *bus, sd_bus_message *m, void *userdata, sd_bus_error *error) {
- int enabled, interactive;
- Context *c = userdata;
- int r;
-
- r = sd_bus_message_read(m, "bb", &enabled, &interactive);
- if (r < 0)
- return r;
-
- if ((bool)enabled == c->use_ntp)
- return sd_bus_reply_method_return(m, NULL);
-
- r = bus_verify_polkit_async(
- m,
- CAP_SYS_TIME,
- "org.freedesktop.timedate1.set-ntp",
- interactive,
- UID_INVALID,
- &c->polkit_registry,
- error);
- if (r < 0)
- return r;
- if (r == 0)
- return 1;
-
- r = context_enable_ntp(bus, error, enabled);
- if (r < 0)
- return r;
-
- r = context_start_ntp(bus, error, enabled);
- if (r < 0)
- return r;
-
- c->use_ntp = enabled;
- log_info("Set NTP to %s", enabled ? "enabled" : "disabled");
-
- 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", bus_property_get_bool, offsetof(Context, can_ntp), 0),
- SD_BUS_PROPERTY("NTP", "b", bus_property_get_bool, offsetof(Context, use_ntp), 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_bus_close_unref_ 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(bus, "org.freedesktop.timedate1", 0);
- if (r < 0)
- return log_error_errno(r, "Failed to register 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 = bus;
- bus = NULL;
-
- return 0;
-}
-
-int main(int argc, char *argv[]) {
- Context context = {};
- _cleanup_event_unref_ sd_event *event = NULL;
- _cleanup_bus_close_unref_ 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_read_ntp(&context, bus);
- if (r < 0) {
- log_error_errno(r, "Failed to determine whether NTP is enabled: %m");
- 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;
-}
~ianmdlvl / elogind.git / blobdiff