1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2011 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include "sd-daemon.h"
31 #include "conf-parser.h"
33 #include "bus-error.h"
35 #include "udev-util.h"
37 Manager *manager_new(void) {
45 m->console_active_fd = -1;
48 m->inhibit_delay_max = 5 * USEC_PER_SEC;
49 m->handle_power_key = HANDLE_POWEROFF;
50 m->handle_suspend_key = HANDLE_SUSPEND;
51 m->handle_hibernate_key = HANDLE_HIBERNATE;
52 m->handle_lid_switch = HANDLE_SUSPEND;
53 m->handle_lid_switch_docked = HANDLE_IGNORE;
54 m->lid_switch_ignore_inhibited = true;
55 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
57 m->idle_action_usec = 30 * USEC_PER_MINUTE;
58 m->idle_action = HANDLE_IGNORE;
59 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
61 m->runtime_dir_size = PAGE_ALIGN((size_t) (physical_memory() / 10)); /* 10% */
63 m->devices = hashmap_new(&string_hash_ops);
64 m->seats = hashmap_new(&string_hash_ops);
65 m->sessions = hashmap_new(&string_hash_ops);
66 m->users = hashmap_new(NULL);
67 m->inhibitors = hashmap_new(&string_hash_ops);
68 m->buttons = hashmap_new(&string_hash_ops);
70 m->busnames = set_new(&string_hash_ops);
72 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->busnames)
75 m->kill_exclude_users = strv_new("root", NULL);
76 if (!m->kill_exclude_users)
83 r = sd_event_default(&m->event);
87 sd_event_set_watchdog(m->event, true);
96 void manager_free(Manager *m) {
106 while ((session = hashmap_first(m->sessions)))
107 session_free(session);
109 while ((u = hashmap_first(m->users)))
112 while ((d = hashmap_first(m->devices)))
115 while ((s = hashmap_first(m->seats)))
118 while ((i = hashmap_first(m->inhibitors)))
121 while ((b = hashmap_first(m->buttons)))
124 hashmap_free(m->devices);
125 hashmap_free(m->seats);
126 hashmap_free(m->sessions);
127 hashmap_free(m->users);
128 hashmap_free(m->inhibitors);
129 hashmap_free(m->buttons);
131 set_free_free(m->busnames);
133 sd_event_source_unref(m->idle_action_event_source);
135 sd_event_source_unref(m->console_active_event_source);
136 sd_event_source_unref(m->udev_seat_event_source);
137 sd_event_source_unref(m->udev_device_event_source);
138 sd_event_source_unref(m->udev_vcsa_event_source);
139 sd_event_source_unref(m->udev_button_event_source);
140 sd_event_source_unref(m->lid_switch_ignore_event_source);
142 safe_close(m->console_active_fd);
144 if (m->udev_seat_monitor)
145 udev_monitor_unref(m->udev_seat_monitor);
146 if (m->udev_device_monitor)
147 udev_monitor_unref(m->udev_device_monitor);
148 if (m->udev_vcsa_monitor)
149 udev_monitor_unref(m->udev_vcsa_monitor);
150 if (m->udev_button_monitor)
151 udev_monitor_unref(m->udev_button_monitor);
156 bus_verify_polkit_async_registry_free(m->polkit_registry);
158 sd_bus_unref(m->bus);
159 sd_event_unref(m->event);
161 strv_free(m->kill_only_users);
162 strv_free(m->kill_exclude_users);
168 static int manager_enumerate_devices(Manager *m) {
169 struct udev_list_entry *item = NULL, *first = NULL;
170 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
175 /* Loads devices from udev and creates seats for them as
178 e = udev_enumerate_new(m->udev);
182 r = udev_enumerate_add_match_tag(e, "master-of-seat");
186 r = udev_enumerate_add_match_is_initialized(e);
190 r = udev_enumerate_scan_devices(e);
194 first = udev_enumerate_get_list_entry(e);
195 udev_list_entry_foreach(item, first) {
196 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
199 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
203 k = manager_process_seat_device(m, d);
211 static int manager_enumerate_buttons(Manager *m) {
212 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
213 struct udev_list_entry *item = NULL, *first = NULL;
218 /* Loads buttons from udev */
220 if (m->handle_power_key == HANDLE_IGNORE &&
221 m->handle_suspend_key == HANDLE_IGNORE &&
222 m->handle_hibernate_key == HANDLE_IGNORE &&
223 m->handle_lid_switch == HANDLE_IGNORE &&
224 m->handle_lid_switch_docked == HANDLE_IGNORE)
227 e = udev_enumerate_new(m->udev);
231 r = udev_enumerate_add_match_subsystem(e, "input");
235 r = udev_enumerate_add_match_tag(e, "power-switch");
239 r = udev_enumerate_add_match_is_initialized(e);
243 r = udev_enumerate_scan_devices(e);
247 first = udev_enumerate_get_list_entry(e);
248 udev_list_entry_foreach(item, first) {
249 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
252 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
256 k = manager_process_button_device(m, d);
264 static int manager_enumerate_seats(Manager *m) {
265 _cleanup_closedir_ DIR *d = NULL;
271 /* This loads data about seats stored on disk, but does not
272 * actually create any seats. Removes data of seats that no
275 d = opendir("/run/systemd/seats");
280 log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
284 FOREACH_DIRENT(de, d, return -errno) {
288 if (!dirent_is_file(de))
291 s = hashmap_get(m->seats, de->d_name);
293 unlinkat(dirfd(d), de->d_name, 0);
305 static int manager_enumerate_linger_users(Manager *m) {
306 _cleanup_closedir_ DIR *d = NULL;
312 d = opendir("/var/lib/systemd/linger");
317 log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
321 FOREACH_DIRENT(de, d, return -errno) {
324 if (!dirent_is_file(de))
327 k = manager_add_user_by_name(m, de->d_name, NULL);
329 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
337 static int manager_enumerate_users(Manager *m) {
338 _cleanup_closedir_ DIR *d = NULL;
344 /* Add lingering users */
345 r = manager_enumerate_linger_users(m);
347 /* Read in user data stored on disk */
348 d = opendir("/run/systemd/users");
353 log_error_errno(errno, "Failed to open /run/systemd/users: %m");
357 FOREACH_DIRENT(de, d, return -errno) {
360 if (!dirent_is_file(de))
363 k = manager_add_user_by_name(m, de->d_name, &u);
365 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
371 user_add_to_gc_queue(u);
381 static int manager_enumerate_sessions(Manager *m) {
382 _cleanup_closedir_ DIR *d = NULL;
388 /* Read in session data stored on disk */
389 d = opendir("/run/systemd/sessions");
394 log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
398 FOREACH_DIRENT(de, d, return -errno) {
402 if (!dirent_is_file(de))
405 if (!session_id_valid(de->d_name)) {
406 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
411 k = manager_add_session(m, de->d_name, &s);
413 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
419 session_add_to_gc_queue(s);
429 static int manager_enumerate_inhibitors(Manager *m) {
430 _cleanup_closedir_ DIR *d = NULL;
436 d = opendir("/run/systemd/inhibit");
441 log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
445 FOREACH_DIRENT(de, d, return -errno) {
449 if (!dirent_is_file(de))
452 k = manager_add_inhibitor(m, de->d_name, &i);
454 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
459 k = inhibitor_load(i);
467 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
468 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
469 Manager *m = userdata;
473 d = udev_monitor_receive_device(m->udev_seat_monitor);
477 manager_process_seat_device(m, d);
481 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
482 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
483 Manager *m = userdata;
487 d = udev_monitor_receive_device(m->udev_device_monitor);
491 manager_process_seat_device(m, d);
495 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
496 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
497 Manager *m = userdata;
501 d = udev_monitor_receive_device(m->udev_button_monitor);
505 manager_process_button_device(m, d);
509 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
510 Manager *m = userdata;
514 assert(m->console_active_fd == fd);
516 seat_read_active_vt(m->seat0);
520 static int manager_connect_bus(Manager *m) {
521 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
527 r = sd_bus_default_system(&m->bus);
529 return log_error_errno(r, "Failed to connect to system bus: %m");
531 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
533 return log_error_errno(r, "Failed to add manager object vtable: %m");
535 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
537 return log_error_errno(r, "Failed to add seat object vtable: %m");
539 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
541 return log_error_errno(r, "Failed to add seat enumerator: %m");
543 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
545 return log_error_errno(r, "Failed to add session object vtable: %m");
547 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
549 return log_error_errno(r, "Failed to add session enumerator: %m");
551 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
553 return log_error_errno(r, "Failed to add user object vtable: %m");
555 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
557 return log_error_errno(r, "Failed to add user enumerator: %m");
559 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
561 return log_error_errno(r, "Failed to register name: %m");
563 r = sd_bus_attach_event(m->bus, m->event, 0);
565 return log_error_errno(r, "Failed to attach bus to event loop: %m");
570 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
572 Session *active, *iter;
575 * We got a VT-switch signal and we have to acknowledge it immediately.
576 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
577 * old user-space might run multiple sessions on a single VT, *sigh*.
578 * Therefore, we have to iterate all sessions and find one with a vtfd
579 * on the requested VT.
580 * As only VTs with active controllers have VT_PROCESS set, our current
581 * notion of the active VT might be wrong (for instance if the switch
582 * happens while we setup VT_PROCESS). Therefore, read the current VT
583 * first and then use s->active->vtnr as reference. Note that this is
584 * not racy, as no further VT-switch can happen as long as we're in
585 * synchronous VT_PROCESS mode.
589 seat_read_active_vt(m->seat0);
591 active = m->seat0->active;
592 if (!active || active->vtnr < 1) {
593 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
597 if (active->vtfd >= 0) {
598 session_leave_vt(active);
600 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
601 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
602 session_leave_vt(iter);
611 static int manager_connect_console(Manager *m) {
615 assert(m->console_active_fd < 0);
617 /* On certain architectures (S390 and Xen, and containers),
618 /dev/tty0 does not exist, so don't fail if we can't open
620 if (access("/dev/tty0", F_OK) < 0)
623 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
624 if (m->console_active_fd < 0) {
626 /* On some systems the device node /dev/tty0 may exist
627 * even though /sys/class/tty/tty0 does not. */
631 log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
635 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
637 log_error("Failed to watch foreground console");
642 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
643 * as VT-acquire signal. We ignore any acquire-events (yes, we still
644 * have to provide a valid signal-number for it!) and acknowledge all
645 * release events immediately.
648 if (SIGRTMIN + 1 > SIGRTMAX) {
649 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
653 r = ignore_signals(SIGRTMIN + 1, -1);
655 return log_error_errno(r, "Cannot ignore SIGRTMIN + 1: %m");
657 r = sigprocmask_many(SIG_BLOCK, SIGRTMIN, -1);
659 return log_error_errno(r, "Cannot block SIGRTMIN: %m");
661 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
668 static int manager_connect_udev(Manager *m) {
672 assert(!m->udev_seat_monitor);
673 assert(!m->udev_device_monitor);
674 assert(!m->udev_vcsa_monitor);
675 assert(!m->udev_button_monitor);
677 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
678 if (!m->udev_seat_monitor)
681 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
685 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
689 r = sd_event_add_io(m->event, &m->udev_seat_event_source, udev_monitor_get_fd(m->udev_seat_monitor), EPOLLIN, manager_dispatch_seat_udev, m);
693 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
694 if (!m->udev_device_monitor)
697 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
701 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
705 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
709 r = udev_monitor_enable_receiving(m->udev_device_monitor);
713 r = sd_event_add_io(m->event, &m->udev_device_event_source, udev_monitor_get_fd(m->udev_device_monitor), EPOLLIN, manager_dispatch_device_udev, m);
717 /* Don't watch keys if nobody cares */
718 if (m->handle_power_key != HANDLE_IGNORE ||
719 m->handle_suspend_key != HANDLE_IGNORE ||
720 m->handle_hibernate_key != HANDLE_IGNORE ||
721 m->handle_lid_switch != HANDLE_IGNORE ||
722 m->handle_lid_switch_docked != HANDLE_IGNORE) {
724 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
725 if (!m->udev_button_monitor)
728 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
732 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
736 r = udev_monitor_enable_receiving(m->udev_button_monitor);
740 r = sd_event_add_io(m->event, &m->udev_button_event_source, udev_monitor_get_fd(m->udev_button_monitor), EPOLLIN, manager_dispatch_button_udev, m);
748 void manager_gc(Manager *m, bool drop_not_started) {
755 while ((seat = m->seat_gc_queue)) {
756 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
757 seat->in_gc_queue = false;
759 if (!seat_check_gc(seat, drop_not_started)) {
760 seat_stop(seat, false);
765 while ((session = m->session_gc_queue)) {
766 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
767 session->in_gc_queue = false;
769 /* First, if we are not closing yet, initiate stopping */
770 if (!session_check_gc(session, drop_not_started) &&
771 session_get_state(session) != SESSION_CLOSING)
772 session_stop(session, false);
774 /* Normally, this should make the session busy again,
775 * if it doesn't then let's get rid of it
777 if (!session_check_gc(session, drop_not_started)) {
778 session_finalize(session);
779 session_free(session);
783 while ((user = m->user_gc_queue)) {
784 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
785 user->in_gc_queue = false;
787 /* First step: queue stop jobs */
788 if (!user_check_gc(user, drop_not_started))
789 user_stop(user, false);
791 /* Second step: finalize user */
792 if (!user_check_gc(user, drop_not_started)) {
799 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
800 Manager *m = userdata;
801 struct dual_timestamp since;
807 if (m->idle_action == HANDLE_IGNORE ||
808 m->idle_action_usec <= 0)
811 n = now(CLOCK_MONOTONIC);
813 r = manager_get_idle_hint(m, &since);
815 /* Not idle. Let's check if after a timeout it might be idle then. */
816 elapse = n + m->idle_action_usec;
818 /* Idle! Let's see if it's time to do something, or if
819 * we shall sleep for longer. */
821 if (n >= since.monotonic + m->idle_action_usec &&
822 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
823 log_info("System idle. Taking action.");
825 manager_handle_action(m, 0, m->idle_action, false, false);
826 m->idle_action_not_before_usec = n;
829 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
832 if (!m->idle_action_event_source) {
834 r = sd_event_add_time(
836 &m->idle_action_event_source,
838 elapse, USEC_PER_SEC*30,
839 manager_dispatch_idle_action, m);
841 return log_error_errno(r, "Failed to add idle event source: %m");
843 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
845 return log_error_errno(r, "Failed to set idle event source priority: %m");
847 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
849 return log_error_errno(r, "Failed to set idle event timer: %m");
851 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
853 return log_error_errno(r, "Failed to enable idle event timer: %m");
859 int manager_startup(Manager *m) {
865 Inhibitor *inhibitor;
870 /* Connect to console */
871 r = manager_connect_console(m);
875 /* Connect to udev */
876 r = manager_connect_udev(m);
878 return log_error_errno(r, "Failed to create udev watchers: %m");
880 /* Connect to the bus */
881 r = manager_connect_bus(m);
885 /* Instantiate magic seat 0 */
886 r = manager_add_seat(m, "seat0", &m->seat0);
888 return log_error_errno(r, "Failed to add seat0: %m");
890 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
892 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
894 /* Deserialize state */
895 r = manager_enumerate_devices(m);
897 log_warning_errno(r, "Device enumeration failed: %m");
899 r = manager_enumerate_seats(m);
901 log_warning_errno(r, "Seat enumeration failed: %m");
903 r = manager_enumerate_users(m);
905 log_warning_errno(r, "User enumeration failed: %m");
907 r = manager_enumerate_sessions(m);
909 log_warning_errno(r, "Session enumeration failed: %m");
911 r = manager_enumerate_inhibitors(m);
913 log_warning_errno(r, "Inhibitor enumeration failed: %m");
915 r = manager_enumerate_buttons(m);
917 log_warning_errno(r, "Button enumeration failed: %m");
919 /* Remove stale objects before we start them */
920 manager_gc(m, false);
922 /* And start everything */
923 HASHMAP_FOREACH(seat, m->seats, i)
926 HASHMAP_FOREACH(user, m->users, i)
929 HASHMAP_FOREACH(session, m->sessions, i)
930 session_start(session);
932 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
933 inhibitor_start(inhibitor);
935 HASHMAP_FOREACH(button, m->buttons, i)
936 button_check_switches(button);
938 manager_dispatch_idle_action(NULL, 0, m);
943 int manager_run(Manager *m) {
949 usec_t us = (uint64_t) -1;
951 r = sd_event_get_state(m->event);
954 if (r == SD_EVENT_FINISHED)
959 if (manager_dispatch_delayed(m) > 0)
962 if (m->action_what != 0 && !m->action_job) {
965 x = now(CLOCK_MONOTONIC);
966 y = m->action_timestamp + m->inhibit_delay_max;
968 us = x >= y ? 0 : y - x;
971 r = sd_event_run(m->event, us);
977 static int manager_parse_config_file(Manager *m) {
980 return config_parse_many("/etc/systemd/logind.conf",
981 CONF_DIRS_NULSTR("systemd/logind.conf"),
983 config_item_perf_lookup, logind_gperf_lookup,
987 int main(int argc, char *argv[]) {
991 log_set_target(LOG_TARGET_AUTO);
992 log_set_facility(LOG_AUTH);
993 log_parse_environment();
999 log_error("This program takes no arguments.");
1004 /* Always create the directories people can create inotify
1005 * watches in. Note that some applications might check for the
1006 * existence of /run/systemd/seats/ to determine whether
1007 * logind is available, so please always make sure this check
1009 mkdir_label("/run/systemd/seats", 0755);
1010 mkdir_label("/run/systemd/users", 0755);
1011 mkdir_label("/run/systemd/sessions", 0755);
1019 manager_parse_config_file(m);
1021 r = manager_startup(m);
1023 log_error_errno(r, "Failed to fully start up daemon: %m");
1027 log_debug("logind running as pid "PID_FMT, getpid());
1031 "STATUS=Processing requests...");
1035 log_debug("logind stopped as pid "PID_FMT, getpid());
1040 "STATUS=Shutting down...");
1045 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;