2 This file is part of elogind.
4 Copyright 2017 Sven Eden
6 elogind is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 elogind is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with elogind; If not, see <http://www.gnu.org/licenses/>.
21 #include "bus-common-errors.h"
22 #include "bus-error.h"
24 #include "elogind-dbus.h"
26 #include "process-util.h"
27 #include "sd-messages.h"
29 #include "sleep-config.h"
30 #include "string-util.h"
32 #include "update-utmp.h"
33 #include "user-util.h"
36 static int bus_manager_log_shutdown(
39 HandleAction action) {
45 if (w != INHIBIT_SHUTDOWN)
50 p = "MESSAGE=System is powering down.";
51 q = "SHUTDOWN=power-off";
54 p = "MESSAGE=System is halting.";
58 p = "MESSAGE=System is rebooting.";
59 q = "SHUTDOWN=reboot";
62 p = "MESSAGE=System is rebooting with kexec.";
66 p = "MESSAGE=System is shutting down.";
70 if (isempty(m->wall_message))
73 p = strjoina(p, " (", m->wall_message, ").");
75 return log_struct(LOG_NOTICE,
76 "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
82 /* elogind specific helper to make HALT and REBOOT possible. */
83 static int run_helper(const char *helper) {
87 r = safe_fork_full(helper, NULL, 0, FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_WAIT, &pid);
90 return log_error_errno(errno, "Failed to fork run %s: %m", helper);
95 execlp(helper, helper, NULL);
96 log_error_errno(errno, "Failed to execute %s: %m", helper);
103 /* elogind specific executor */
104 static int shutdown_or_sleep(Manager *m, HandleAction action) {
109 case HANDLE_POWEROFF:
110 return run_helper(POWEROFF);
112 return run_helper(REBOOT);
114 return run_helper(HALT);
116 return run_helper(KEXEC);
118 return do_sleep("suspend", m->suspend_mode, m->suspend_state);
119 case HANDLE_HIBERNATE:
120 return do_sleep("hibernate", m->hibernate_mode, m->hibernate_state);
121 case HANDLE_HYBRID_SLEEP:
122 return do_sleep("hybrid-sleep", m->hybrid_sleep_mode, m->hybrid_sleep_state);
128 static int execute_shutdown_or_sleep(
132 sd_bus_error *error) {
134 char** argv_utmp = NULL;
139 assert(w < _INHIBIT_WHAT_MAX);
141 bus_manager_log_shutdown(m, w, action);
143 if (IN_SET(action, HANDLE_HALT, HANDLE_POWEROFF, HANDLE_REBOOT)) {
145 /* As we have no systemd update-utmp daemon running, we have to
146 * set the relevant utmp/wtmp entries ourselves.
149 if (strv_extend(&argv_utmp, "elogind") < 0)
152 if (HANDLE_REBOOT == action) {
153 if (strv_extend(&argv_utmp, "reboot") < 0)
156 if (strv_extend(&argv_utmp, "shutdown") < 0)
160 /* This comes from our patched update-utmp/update-utmp.c */
161 update_utmp(2, argv_utmp, m->bus);
162 strv_free(argv_utmp);
165 /* Now perform the requested action */
166 r = shutdown_or_sleep(m, action);
168 /* no more pending actions, whether this failed or not */
169 m->pending_action = HANDLE_IGNORE;
171 /* As elogind can not rely on a systemd manager to call all
172 * sleeping processes to wake up, we have to tell them all
174 if (w == INHIBIT_SLEEP) {
175 (void) send_prepare_for(m, w, false);
183 /* Make sure the lid switch is ignored for a while */
184 manager_set_lid_switch_ignore(m, now(CLOCK_MONOTONIC) + m->holdoff_timeout_usec);
189 int manager_dispatch_delayed(Manager *manager, bool timeout) {
191 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
192 Inhibitor *offending = NULL;
197 if ( (0 == manager->action_what) || (HANDLE_IGNORE == manager->pending_action) )
200 if (manager_is_inhibited(manager, manager->action_what, INHIBIT_DELAY, NULL, false, false, 0, &offending)) {
201 _cleanup_free_ char *comm = NULL, *u = NULL;
206 (void) get_process_comm(offending->pid, &comm);
207 u = uid_to_name(offending->uid);
209 log_notice("Delay lock is active (UID "UID_FMT"/%s, PID "PID_FMT"/%s) but inhibitor timeout is reached.",
210 offending->uid, strna(u),
211 offending->pid, strna(comm));
214 /* Actually do the operation */
215 r = execute_shutdown_or_sleep(manager, manager->action_what, manager->pending_action, &error);
217 log_warning("Failed to send delayed message: %s", bus_error_message(&error, r));
219 manager->pending_action = HANDLE_IGNORE;
220 manager->action_what = 0;
221 /* It is not a critical error for elogind if suspending fails */
227 static int delay_shutdown_or_sleep(
230 HandleAction action) {
237 assert(w < _INHIBIT_WHAT_MAX);
239 timeout_val = now(CLOCK_MONOTONIC) + m->inhibit_delay_max;
241 if (m->inhibit_timeout_source) {
242 r = sd_event_source_set_time(m->inhibit_timeout_source, timeout_val);
244 return log_error_errno(r, "sd_event_source_set_time() failed: %m");
246 r = sd_event_source_set_enabled(m->inhibit_timeout_source, SD_EVENT_ONESHOT);
248 return log_error_errno(r, "sd_event_source_set_enabled() failed: %m");
250 r = sd_event_add_time(m->event, &m->inhibit_timeout_source, CLOCK_MONOTONIC,
251 timeout_val, 0, manager_inhibit_timeout_handler, m);
256 m->pending_action = action;
262 int bus_manager_shutdown_or_sleep_now_or_later(
266 sd_bus_error *error) {
273 assert(w <= _INHIBIT_WHAT_MAX);
275 /* Tell everybody to prepare for shutdown/sleep */
276 (void) send_prepare_for(m, w, true);
279 m->inhibit_delay_max > 0 &&
280 manager_is_inhibited(m, w, INHIBIT_DELAY, NULL, false, false, 0, NULL);
282 log_debug_elogind("%s called for %s (%sdelayed)", __FUNCTION__,
283 handle_action_to_string(action),
284 delayed ? "" : "NOT ");
287 /* Shutdown is delayed, keep in mind what we
288 * want to do, and start a timeout */
289 r = delay_shutdown_or_sleep(m, w, action);
291 /* Shutdown is not delayed, execute it
293 r = execute_shutdown_or_sleep(m, w, action, error);
298 static int method_do_shutdown_or_sleep(
300 sd_bus_message *message,
301 HandleAction sleep_action,
304 const char *action_multiple_sessions,
305 const char *action_ignore_inhibit,
306 const char *sleep_verb,
307 sd_bus_error *error) {
314 assert(w <= _INHIBIT_WHAT_MAX);
316 r = sd_bus_message_read(message, "b", &interactive);
320 log_debug_elogind("%s called with action '%s', sleep '%s' (%sinteractive)",
321 __FUNCTION__, action, sleep_verb,
322 interactive ? "" : "NOT ");
324 /* Don't allow multiple jobs being executed at the same time */
326 return sd_bus_error_setf(error, BUS_ERROR_OPERATION_IN_PROGRESS, "There's already a shutdown or sleep operation in progress");
329 r = can_sleep(m, sleep_verb);
334 return sd_bus_error_setf(error, BUS_ERROR_SLEEP_VERB_NOT_SUPPORTED, "Sleep verb not supported");
337 if (IN_SET(sleep_action, HANDLE_HALT, HANDLE_POWEROFF, HANDLE_REBOOT)) {
338 r = verify_shutdown_creds(m, message, w, interactive, action, action_multiple_sessions,
339 action_ignore_inhibit, error);
340 log_debug_elogind("verify_shutdown_creds() returned %d", r);
345 r = bus_manager_shutdown_or_sleep_now_or_later(m, sleep_action, w, error);
349 return sd_bus_reply_method_return(message, NULL);
352 int method_poweroff(sd_bus_message *message, void *userdata, sd_bus_error *error) {
353 Manager *m = userdata;
355 log_debug_elogind("%s called", __FUNCTION__);
357 return method_do_shutdown_or_sleep(
361 "org.freedesktop.login1.power-off",
362 "org.freedesktop.login1.power-off-multiple-sessions",
363 "org.freedesktop.login1.power-off-ignore-inhibit",
368 int method_reboot(sd_bus_message *message, void *userdata, sd_bus_error *error) {
369 Manager *m = userdata;
371 log_debug_elogind("%s called", __FUNCTION__);
373 return method_do_shutdown_or_sleep(
377 "org.freedesktop.login1.reboot",
378 "org.freedesktop.login1.reboot-multiple-sessions",
379 "org.freedesktop.login1.reboot-ignore-inhibit",
384 int method_halt(sd_bus_message *message, void *userdata, sd_bus_error *error) {
385 Manager *m = userdata;
387 log_debug_elogind("%s called", __FUNCTION__);
389 return method_do_shutdown_or_sleep(
393 "org.freedesktop.login1.halt",
394 "org.freedesktop.login1.halt-multiple-sessions",
395 "org.freedesktop.login1.halt-ignore-inhibit",
400 int method_suspend(sd_bus_message *message, void *userdata, sd_bus_error *error) {
401 Manager *m = userdata;
403 log_debug_elogind("%s called", __FUNCTION__);
405 return method_do_shutdown_or_sleep(
409 "org.freedesktop.login1.suspend",
410 "org.freedesktop.login1.suspend-multiple-sessions",
411 "org.freedesktop.login1.suspend-ignore-inhibit",
416 int manager_scheduled_shutdown_handler(
421 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
422 Manager *m = userdata;
428 if (isempty(m->scheduled_shutdown_type))
431 if (streq(m->scheduled_shutdown_type, "halt"))
432 action = HANDLE_HALT;
433 else if (streq(m->scheduled_shutdown_type, "poweroff"))
434 action = HANDLE_POWEROFF;
436 action = HANDLE_REBOOT;
438 /* Don't allow multiple jobs being executed at the same time */
439 if (m->action_what) {
441 log_error("Scheduled shutdown to %s failed: shutdown or sleep operation already in progress",
442 m->scheduled_shutdown_type);
446 if (m->shutdown_dry_run) {
447 /* We do not process delay inhibitors here. Otherwise, we
448 * would have to be considered "in progress" (like the check
449 * above) for some seconds after our admin has seen the final
452 bus_manager_log_shutdown(m, target);
453 log_info("Running in dry run, suppressing action.");
454 reset_scheduled_shutdown(m);
459 r = execute_shutdown_or_sleep(m, 0, action, &error);
461 log_error_errno(r, "Scheduled shutdown to %s failed: %m",
462 m->scheduled_shutdown_type);
469 reset_scheduled_shutdown(m);
473 int method_hibernate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
474 Manager *m = userdata;
476 log_debug_elogind("%s called", __FUNCTION__);
478 return method_do_shutdown_or_sleep(
482 "org.freedesktop.login1.hibernate",
483 "org.freedesktop.login1.hibernate-multiple-sessions",
484 "org.freedesktop.login1.hibernate-ignore-inhibit",
489 int method_hybrid_sleep(sd_bus_message *message, void *userdata, sd_bus_error *error) {
490 Manager *m = userdata;
492 log_debug_elogind("%s called", __FUNCTION__);
494 return method_do_shutdown_or_sleep(
498 "org.freedesktop.login1.hibernate",
499 "org.freedesktop.login1.hibernate-multiple-sessions",
500 "org.freedesktop.login1.hibernate-ignore-inhibit",