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-error.h"
23 #include "eloginctl.h"
24 #include "logind-action.h"
25 #include "parse-util.h"
26 #include "process-util.h"
28 #include "spawn-polkit-agent.h"
29 #include "string-util.h"
31 #include "terminal-util.h"
32 #include "user-util.h"
36 elogind_action arg_action = _ACTION_INVALID;
37 bool arg_ask_password = true;
38 bool arg_ignore_inhibitors = false;
39 bool arg_no_wall = false;
40 BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
41 char** arg_wall = NULL;
47 } action_table[_ACTION_MAX] = {
48 [ACTION_POWEROFF] = { HANDLE_POWEROFF, "poweroff", },
49 [ACTION_REBOOT] = { HANDLE_REBOOT, "reboot", },
50 [ACTION_SUSPEND] = { HANDLE_SUSPEND, "suspend", },
51 [ACTION_HIBERNATE] = { HANDLE_HIBERNATE, "hibernate", },
52 [ACTION_HYBRID_SLEEP] = { HANDLE_HYBRID_SLEEP, "hybrid-sleep" },
55 static int elogind_set_wall_message(sd_bus* bus, const char* msg);
57 static enum elogind_action verb_to_action(const char *verb) {
58 enum elogind_action i;
60 for (i = _ACTION_INVALID; i < _ACTION_MAX; i++)
61 if (streq_ptr(action_table[i].verb, verb))
64 return _ACTION_INVALID;
67 static int check_inhibitors(sd_bus* bus, enum elogind_action a) {
68 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
69 _cleanup_strv_free_ char **sessions = NULL;
70 const char *what, *who, *why, *mode;
76 if (arg_ignore_inhibitors)
88 r = sd_bus_call_method(
90 "org.freedesktop.login1",
91 "/org/freedesktop/login1",
92 "org.freedesktop.login1.Manager",
98 /* If logind is not around, then there are no inhibitors... */
101 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)");
103 return bus_log_parse_error(r);
105 while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {
106 _cleanup_free_ char *comm = NULL, *user = NULL;
107 _cleanup_strv_free_ char **sv = NULL;
109 if (!streq(mode, "block"))
112 sv = strv_split(what, ":");
117 return log_error_errno(ERANGE, "Bad PID %"PRIu32": %m", pid);
119 if (!strv_contains(sv,
124 ACTION_KEXEC) ? "shutdown" : "sleep"))
127 get_process_comm(pid, &comm);
128 user = uid_to_name(uid);
130 log_warning("Operation inhibited by \"%s\" (PID "PID_FMT" \"%s\", user %s), reason is \"%s\".",
131 who, (pid_t) pid, strna(comm), strna(user), why);
136 return bus_log_parse_error(r);
138 r = sd_bus_message_exit_container(reply);
140 return bus_log_parse_error(r);
142 /* Check for current sessions */
143 sd_get_sessions(&sessions);
144 STRV_FOREACH(s, sessions) {
145 _cleanup_free_ char *type = NULL, *tty = NULL, *seat = NULL, *user = NULL, *service = NULL, *class = NULL;
147 if (sd_session_get_uid(*s, &uid) < 0 || uid == getuid())
150 if (sd_session_get_class(*s, &class) < 0 || !streq(class, "user"))
153 if (sd_session_get_type(*s, &type) < 0 || (!streq(type, "x11") && !streq(type, "tty")))
156 sd_session_get_tty(*s, &tty);
157 sd_session_get_seat(*s, &seat);
158 sd_session_get_service(*s, &service);
159 user = uid_to_name(uid);
161 log_warning("User %s is logged in on %s.", strna(user), isempty(tty) ? (isempty(seat) ? strna(service) : seat) : tty);
168 log_error("Please retry operation after closing inhibitors and logging out other users.\nAlternatively, ignore inhibitors and users with 'loginctl -i %s'.",
169 action_table[a].verb);
174 int elogind_cancel_shutdown(sd_bus *bus) {
175 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
178 r = sd_bus_call_method(
180 "org.freedesktop.login1",
181 "/org/freedesktop/login1",
182 "org.freedesktop.login1.Manager",
183 "CancelScheduledShutdown",
187 return log_warning_errno(r, "Failed to talk to elogind, shutdown hasn't been cancelled: %s", bus_error_message(&error, r));
192 void elogind_cleanup(void) {
193 polkit_agent_close();
197 static int elogind_reboot(sd_bus *bus, enum elogind_action a) {
198 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
199 const char *method = NULL;
201 static const char *table[_ACTION_MAX] = {
202 [ACTION_REBOOT] = "The system is going down for reboot NOW!",
203 [ACTION_POWEROFF] = "The system is going down for power-off NOW!"
209 polkit_agent_open_if_enabled();
213 case ACTION_POWEROFF:
225 case ACTION_HIBERNATE:
226 method = "Hibernate";
229 case ACTION_HYBRID_SLEEP:
230 method = "HybridSleep";
237 r = elogind_set_wall_message(bus, table[a]);
240 log_warning_errno(r, "Failed to set wall message, ignoring: %s",
241 bus_error_message(&error, r));
242 sd_bus_error_free(&error);
245 /* Now call elogind itself to request the operation */
246 r = sd_bus_call_method(
248 "org.freedesktop.login1",
249 "/org/freedesktop/login1",
250 "org.freedesktop.login1.Manager",
258 log_error("Failed to execute operation: %s", bus_error_message(&error, r));
263 static int elogind_schedule_shutdown(sd_bus *bus, enum elogind_action a) {
264 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
265 const char *method = NULL;
271 polkit_agent_open_if_enabled();
275 case ACTION_POWEROFF:
287 r = elogind_set_wall_message(bus, NULL);
290 log_warning_errno(r, "Failed to set wall message, ignoring: %s",
291 bus_error_message(&error, r));
292 sd_bus_error_free(&error);
295 r = sd_bus_call_method(
297 "org.freedesktop.login1",
298 "/org/freedesktop/login1",
299 "org.freedesktop.login1.Manager",
308 log_error("Failed to execute operation: %s", bus_error_message(&error, r));
313 static int elogind_set_wall_message(sd_bus* bus, const char* msg) {
314 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
315 _cleanup_free_ char *m = NULL;
318 if (strv_extend(&arg_wall, msg) < 0)
321 m = strv_join(arg_wall, " ");
325 r = sd_bus_call_method(
327 "org.freedesktop.login1",
328 "/org/freedesktop/login1",
329 "org.freedesktop.login1.Manager",
338 return log_warning_errno(r, "Failed to set wall message, ignoring: %s", bus_error_message(&error, r));
343 static int parse_shutdown_time_spec(const char *t, usec_t *_u) {
349 else if (!strchr(t, ':')) {
352 if (safe_atou64(t, &u) < 0)
355 *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
364 hour = strtol(t, &e, 10);
365 if (errno > 0 || *e != ':' || hour < 0 || hour > 23)
368 minute = strtol(e+1, &e, 10);
369 if (errno > 0 || *e != 0 || minute < 0 || minute > 59)
372 n = now(CLOCK_REALTIME);
373 s = (time_t) (n / USEC_PER_SEC);
375 assert_se(localtime_r(&s, &tm));
377 tm.tm_hour = (int) hour;
378 tm.tm_min = (int) minute;
381 assert_se(s = mktime(&tm));
383 *_u = (usec_t) s * USEC_PER_SEC;
392 void polkit_agent_open_if_enabled(void) {
394 /* Open the polkit agent as a child process if necessary */
396 if (!arg_ask_password)
399 if (arg_transport != BUS_TRANSPORT_LOCAL)
405 int start_special(int argc, char *argv[], void *userdata) {
406 sd_bus *bus = userdata;
407 enum elogind_action a;
413 a = verb_to_action(argv[0]);
415 /* Switch to cancel shutdown, if a shutdown action was requested,
416 and the option to cancel it was set: */
417 if ( IN_SET(a, ACTION_POWEROFF, ACTION_REBOOT)
418 && (arg_action == ACTION_CANCEL_SHUTDOWN) )
419 return elogind_cancel_shutdown(bus);
421 r = check_inhibitors(bus, a);
425 /* No power off actions in chroot environments */
426 if ((a == ACTION_POWEROFF ||
427 a == ACTION_REBOOT) &&
428 (running_in_chroot() > 0) ) {
429 log_info("Running in chroot, ignoring request.");
433 /* Check time arguments */
434 if ( IN_SET(a, ACTION_POWEROFF, ACTION_REBOOT)
436 && (arg_action != ACTION_CANCEL_SHUTDOWN) ) {
437 r = parse_shutdown_time_spec(argv[1], &arg_when);
439 log_error("Failed to parse time specification: %s", argv[optind]);
443 arg_when = now(CLOCK_REALTIME) + USEC_PER_MINUTE;
445 /* The optional user wall message must be set */
446 if ((argc > 1) && (arg_action == ACTION_CANCEL_SHUTDOWN) )
447 /* No time argument for shutdown cancel */
450 /* We skip the time argument */
454 arg_wall = strv_copy(wall);
459 /* Perform requested action */
465 ACTION_HYBRID_SLEEP)) {
467 return elogind_schedule_shutdown(bus, a);
469 return elogind_reboot(bus, a);