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 "sd-messages.h"
29 #include "spawn-polkit-agent.h"
30 #include "string-util.h"
32 #include "terminal-util.h"
33 #include "user-util.h"
37 elogind_action arg_action = _ACTION_INVALID;
38 bool arg_ask_password = true;
39 bool arg_ignore_inhibitors = false;
40 bool arg_no_wall = false;
41 BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
42 char** arg_wall = NULL;
48 } action_table[_ACTION_MAX] = {
49 [ACTION_POWEROFF] = { HANDLE_POWEROFF, "poweroff", },
50 [ACTION_REBOOT] = { HANDLE_REBOOT, "reboot", },
51 [ACTION_SUSPEND] = { HANDLE_SUSPEND, "suspend", },
52 [ACTION_HIBERNATE] = { HANDLE_HIBERNATE, "hibernate", },
53 [ACTION_HYBRID_SLEEP] = { HANDLE_HYBRID_SLEEP, "hybrid-sleep" },
56 static int elogind_set_wall_message(sd_bus* bus, const char* msg);
58 static enum elogind_action verb_to_action(const char *verb) {
59 enum elogind_action i;
61 for (i = _ACTION_INVALID; i < _ACTION_MAX; i++)
62 if (streq_ptr(action_table[i].verb, verb))
65 return _ACTION_INVALID;
69 * systemctl/systemctl.c:3292:logind_check_inhibitors()
71 static int check_inhibitors(sd_bus* bus, enum elogind_action a) {
72 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
73 _cleanup_strv_free_ char **sessions = NULL;
74 const char *what, *who, *why, *mode;
80 if (arg_ignore_inhibitors)
92 if (arg_transport != BUS_TRANSPORT_LOCAL)
95 r = sd_bus_call_method(
97 "org.freedesktop.login1",
98 "/org/freedesktop/login1",
99 "org.freedesktop.login1.Manager",
105 /* If logind is not around, then there are no inhibitors... */
108 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)");
110 return bus_log_parse_error(r);
112 while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {
113 _cleanup_free_ char *comm = NULL, *user = NULL;
114 _cleanup_strv_free_ char **sv = NULL;
116 if (!streq(mode, "block"))
119 sv = strv_split(what, ":");
124 return log_error_errno(ERANGE, "Bad PID %"PRIu32": %m", pid);
126 if (!strv_contains(sv,
131 ACTION_KEXEC) ? "shutdown" : "sleep"))
134 get_process_comm(pid, &comm);
135 user = uid_to_name(uid);
137 log_warning("Operation inhibited by \"%s\" (PID "PID_FMT" \"%s\", user %s), reason is \"%s\".",
138 who, (pid_t) pid, strna(comm), strna(user), why);
143 return bus_log_parse_error(r);
145 r = sd_bus_message_exit_container(reply);
147 return bus_log_parse_error(r);
149 /* Check for current sessions */
150 sd_get_sessions(&sessions);
151 STRV_FOREACH(s, sessions) {
152 _cleanup_free_ char *type = NULL, *tty = NULL, *seat = NULL, *user = NULL, *service = NULL, *class = NULL;
154 if (sd_session_get_uid(*s, &uid) < 0 || uid == getuid())
157 if (sd_session_get_class(*s, &class) < 0 || !streq(class, "user"))
160 if (sd_session_get_type(*s, &type) < 0 || !STR_IN_SET(type, "x11", "tty"))
163 sd_session_get_tty(*s, &tty);
164 sd_session_get_seat(*s, &seat);
165 sd_session_get_service(*s, &service);
166 user = uid_to_name(uid);
168 log_warning("User %s is logged in on %s.", strna(user), isempty(tty) ? (isempty(seat) ? strna(service) : seat) : tty);
175 log_error("Please retry operation after closing inhibitors and logging out other users.\nAlternatively, ignore inhibitors and users with 'loginctl %s -i'.",
176 action_table[a].verb);
182 * systemctl/systemctl.c:8410:logind_cancel_shutdown()
184 int elogind_cancel_shutdown(sd_bus *bus) {
185 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
188 (void) elogind_set_wall_message(bus, NULL);
190 r = sd_bus_call_method(
192 "org.freedesktop.login1",
193 "/org/freedesktop/login1",
194 "org.freedesktop.login1.Manager",
195 "CancelScheduledShutdown",
199 return log_warning_errno(r,
200 "Failed to talk to elogind, shutdown hasn't been cancelled: %s",
201 bus_error_message(&error, r));
206 /* Only a little helper for cleaning up elogind specific extra stuff. */
207 void elogind_cleanup(void) {
208 polkit_agent_close();
212 /* Littel debug log helper, helps debugging systemctl comands we mimic. */
213 static void elogind_log_special(enum elogind_action a) {
214 #ifdef ENABLE_DEBUG_ELOGIND
218 LOG_MESSAGE("Halt action called."),
219 "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
222 case ACTION_POWEROFF:
224 LOG_MESSAGE("Poweroff action called."),
225 "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
230 LOG_MESSAGE("Reboot action called."),
231 "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
236 LOG_MESSAGE("KExec action called."),
237 "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
242 LOG_MESSAGE("Suspend action called."),
243 "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
246 case ACTION_HIBERNATE:
248 LOG_MESSAGE("Hibernate action called."),
249 "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
252 case ACTION_HYBRID_SLEEP:
254 LOG_MESSAGE("Hybrid-Sleep action called."),
255 "MESSAGE_ID=" SD_MESSAGE_SLEEP_START_STR,
258 case ACTION_CANCEL_SHUTDOWN:
260 LOG_MESSAGE("Cancel Shutdown called."),
261 "MESSAGE_ID=" SD_MESSAGE_SHUTDOWN_STR,
267 #endif // ENABLE_DEBUG_ELOGIND
271 * systemctl/systemctl.c:3229:logind_reboot()
273 static int elogind_reboot(sd_bus *bus, enum elogind_action a) {
274 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
275 const char *method = NULL, *description = NULL;
277 static const char *table[_ACTION_MAX] = {
278 [ACTION_REBOOT] = "The system is going down for reboot NOW!",
279 [ACTION_POWEROFF] = "The system is going down for power-off NOW!"
289 description = "reboot system";
292 case ACTION_POWEROFF:
294 description = "power off system";
299 description = "suspend system";
302 case ACTION_HIBERNATE:
303 method = "Hibernate";
304 description = "hibernate system";
307 case ACTION_HYBRID_SLEEP:
308 method = "HybridSleep";
309 description = "put system into hybrid sleep";
316 polkit_agent_open_if_enabled();
318 if ( IN_SET(a, ACTION_POWEROFF, ACTION_REBOOT) )
319 (void) elogind_set_wall_message(bus, table[a]);
321 /* Now call elogind itself to request the operation */
322 r = sd_bus_call_method(
324 "org.freedesktop.login1",
325 "/org/freedesktop/login1",
326 "org.freedesktop.login1.Manager",
330 "b", arg_ask_password);
333 return log_error_errno(r, "Failed to %s via elogind: %s",
335 bus_error_message(&error, r));
341 * systemctl/systemctl.c:8281:logind_schedule_shutdown()
343 static int elogind_schedule_shutdown(sd_bus *bus, enum elogind_action a) {
344 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
345 char date[FORMAT_TIMESTAMP_MAX];
356 case ACTION_POWEROFF:
368 (void) elogind_set_wall_message(bus, NULL);
370 r = sd_bus_call_method(
372 "org.freedesktop.login1",
373 "/org/freedesktop/login1",
374 "org.freedesktop.login1.Manager",
383 return log_warning_errno(r,
384 "Failed to call ScheduleShutdown in logind, proceeding with immediate shutdown: %s",
385 bus_error_message(&error, r));
387 log_info("Shutdown scheduled for %s, use 'shutdown -c' to cancel.",
388 format_timestamp(date, sizeof(date), arg_when));
394 * systemctl/systemctl.c:3193:logind_set_wall_message()
395 * (Tweaked to allow an extra message to be appended.)
397 static int elogind_set_wall_message(sd_bus* bus, const char* msg) {
398 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
399 _cleanup_free_ char *m = NULL;
402 if (strv_extend(&arg_wall, msg) < 0)
405 m = strv_join(arg_wall, " ");
409 r = sd_bus_call_method(
411 "org.freedesktop.login1",
412 "/org/freedesktop/login1",
413 "org.freedesktop.login1.Manager",
422 return log_warning_errno(r, "Failed to set wall message, ignoring: %s", bus_error_message(&error, r));
428 * systemctl/systemctl.c:7743:parse_shutdown_time_spec()
430 static int parse_shutdown_time_spec(const char *t, usec_t *_u) {
436 else if (!strchr(t, ':')) {
439 if (safe_atou64(t, &u) < 0)
442 *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
451 hour = strtol(t, &e, 10);
452 if (errno > 0 || *e != ':' || hour < 0 || hour > 23)
455 minute = strtol(e+1, &e, 10);
456 if (errno > 0 || *e != 0 || minute < 0 || minute > 59)
459 n = now(CLOCK_REALTIME);
460 s = (time_t) (n / USEC_PER_SEC);
462 assert_se(localtime_r(&s, &tm));
464 tm.tm_hour = (int) hour;
465 tm.tm_min = (int) minute;
468 assert_se(s = mktime(&tm));
470 *_u = (usec_t) s * USEC_PER_SEC;
480 * systemctl/systemctl.c:270:polkit_agent_open_if_enabled()
482 void polkit_agent_open_if_enabled(void) {
484 /* Open the polkit agent as a child process if necessary */
486 if (!arg_ask_password)
489 if (arg_transport != BUS_TRANSPORT_LOCAL)
496 * systemctl/systemctl.c:3482:start_special()
497 * However, this elogind variant is very different from the original.
499 int start_special(int argc, char *argv[], void *userdata) {
500 sd_bus *bus = userdata;
501 enum elogind_action a;
507 a = verb_to_action(argv[0]);
509 elogind_log_special(a);
511 /* For poweroff and reboot, some extra checks are performed: */
512 if ( IN_SET(a, ACTION_POWEROFF, ACTION_REBOOT) ) {
514 /* No power off actions in chroot environments */
515 if ( running_in_chroot() > 0 ) {
516 log_info("Running in chroot, ignoring request.");
520 /* Check time argument */
521 if ( (argc > 1) && (ACTION_CANCEL_SHUTDOWN != arg_action)) {
522 r = parse_shutdown_time_spec(argv[1], &arg_when);
524 log_error("Failed to parse time specification: %s", argv[optind]);
529 /* The optional user wall message must be set */
531 && ( (arg_action == ACTION_CANCEL_SHUTDOWN)
532 || (0 == arg_when) ) )
533 /* No time argument for shutdown cancel, or no
534 * time argument given. */
537 /* We skip the time argument */
541 arg_wall = strv_copy(wall);
547 /* Switch to cancel shutdown, if a shutdown action was requested,
548 and the option to cancel it was set: */
549 if ( IN_SET(a, ACTION_POWEROFF, ACTION_REBOOT)
550 && (arg_action == ACTION_CANCEL_SHUTDOWN) )
551 return elogind_cancel_shutdown(bus);
553 r = check_inhibitors(bus, a);
557 /* Perform requested action */
563 ACTION_HYBRID_SLEEP)) {
565 return elogind_schedule_shutdown(bus, a);
567 return elogind_reboot(bus, a);