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);
167 static int manager_enumerate_devices(Manager *m) {
168 struct udev_list_entry *item = NULL, *first = NULL;
169 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
174 /* Loads devices from udev and creates seats for them as
177 e = udev_enumerate_new(m->udev);
181 r = udev_enumerate_add_match_tag(e, "master-of-seat");
185 r = udev_enumerate_add_match_is_initialized(e);
189 r = udev_enumerate_scan_devices(e);
193 first = udev_enumerate_get_list_entry(e);
194 udev_list_entry_foreach(item, first) {
195 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
198 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
202 k = manager_process_seat_device(m, d);
210 static int manager_enumerate_buttons(Manager *m) {
211 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
212 struct udev_list_entry *item = NULL, *first = NULL;
217 /* Loads buttons from udev */
219 if (m->handle_power_key == HANDLE_IGNORE &&
220 m->handle_suspend_key == HANDLE_IGNORE &&
221 m->handle_hibernate_key == HANDLE_IGNORE &&
222 m->handle_lid_switch == HANDLE_IGNORE &&
223 m->handle_lid_switch_docked == HANDLE_IGNORE)
226 e = udev_enumerate_new(m->udev);
230 r = udev_enumerate_add_match_subsystem(e, "input");
234 r = udev_enumerate_add_match_tag(e, "power-switch");
238 r = udev_enumerate_add_match_is_initialized(e);
242 r = udev_enumerate_scan_devices(e);
246 first = udev_enumerate_get_list_entry(e);
247 udev_list_entry_foreach(item, first) {
248 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
251 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
255 k = manager_process_button_device(m, d);
263 static int manager_enumerate_seats(Manager *m) {
264 _cleanup_closedir_ DIR *d = NULL;
270 /* This loads data about seats stored on disk, but does not
271 * actually create any seats. Removes data of seats that no
274 d = opendir("/run/systemd/seats");
279 log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
283 FOREACH_DIRENT(de, d, return -errno) {
287 if (!dirent_is_file(de))
290 s = hashmap_get(m->seats, de->d_name);
292 unlinkat(dirfd(d), de->d_name, 0);
304 static int manager_enumerate_linger_users(Manager *m) {
305 _cleanup_closedir_ DIR *d = NULL;
311 d = opendir("/var/lib/systemd/linger");
316 log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
320 FOREACH_DIRENT(de, d, return -errno) {
323 if (!dirent_is_file(de))
326 k = manager_add_user_by_name(m, de->d_name, NULL);
328 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
336 static int manager_enumerate_users(Manager *m) {
337 _cleanup_closedir_ DIR *d = NULL;
343 /* Add lingering users */
344 r = manager_enumerate_linger_users(m);
346 /* Read in user data stored on disk */
347 d = opendir("/run/systemd/users");
352 log_error_errno(errno, "Failed to open /run/systemd/users: %m");
356 FOREACH_DIRENT(de, d, return -errno) {
359 if (!dirent_is_file(de))
362 k = manager_add_user_by_name(m, de->d_name, &u);
364 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
370 user_add_to_gc_queue(u);
380 static int manager_enumerate_sessions(Manager *m) {
381 _cleanup_closedir_ DIR *d = NULL;
387 /* Read in session data stored on disk */
388 d = opendir("/run/systemd/sessions");
393 log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
397 FOREACH_DIRENT(de, d, return -errno) {
401 if (!dirent_is_file(de))
404 if (!session_id_valid(de->d_name)) {
405 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
410 k = manager_add_session(m, de->d_name, &s);
412 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
418 session_add_to_gc_queue(s);
428 static int manager_enumerate_inhibitors(Manager *m) {
429 _cleanup_closedir_ DIR *d = NULL;
435 d = opendir("/run/systemd/inhibit");
440 log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
444 FOREACH_DIRENT(de, d, return -errno) {
448 if (!dirent_is_file(de))
451 k = manager_add_inhibitor(m, de->d_name, &i);
453 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
458 k = inhibitor_load(i);
466 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
467 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
468 Manager *m = userdata;
472 d = udev_monitor_receive_device(m->udev_seat_monitor);
476 manager_process_seat_device(m, d);
480 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
481 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
482 Manager *m = userdata;
486 d = udev_monitor_receive_device(m->udev_device_monitor);
490 manager_process_seat_device(m, d);
494 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
495 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
496 Manager *m = userdata;
500 d = udev_monitor_receive_device(m->udev_button_monitor);
504 manager_process_button_device(m, d);
508 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
509 Manager *m = userdata;
513 assert(m->console_active_fd == fd);
515 seat_read_active_vt(m->seat0);
519 static int manager_connect_bus(Manager *m) {
520 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
526 r = sd_bus_default_system(&m->bus);
528 return log_error_errno(r, "Failed to connect to system bus: %m");
530 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
532 return log_error_errno(r, "Failed to add manager object vtable: %m");
534 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
536 return log_error_errno(r, "Failed to add seat object vtable: %m");
538 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
540 return log_error_errno(r, "Failed to add seat enumerator: %m");
542 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
544 return log_error_errno(r, "Failed to add session object vtable: %m");
546 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
548 return log_error_errno(r, "Failed to add session enumerator: %m");
550 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
552 return log_error_errno(r, "Failed to add user object vtable: %m");
554 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
556 return log_error_errno(r, "Failed to add user enumerator: %m");
558 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
560 return log_error_errno(r, "Failed to register name: %m");
562 r = sd_bus_attach_event(m->bus, m->event, 0);
564 return log_error_errno(r, "Failed to attach bus to event loop: %m");
569 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
571 Session *active, *iter;
574 * We got a VT-switch signal and we have to acknowledge it immediately.
575 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
576 * old user-space might run multiple sessions on a single VT, *sigh*.
577 * Therefore, we have to iterate all sessions and find one with a vtfd
578 * on the requested VT.
579 * As only VTs with active controllers have VT_PROCESS set, our current
580 * notion of the active VT might be wrong (for instance if the switch
581 * happens while we setup VT_PROCESS). Therefore, read the current VT
582 * first and then use s->active->vtnr as reference. Note that this is
583 * not racy, as no further VT-switch can happen as long as we're in
584 * synchronous VT_PROCESS mode.
588 seat_read_active_vt(m->seat0);
590 active = m->seat0->active;
591 if (!active || active->vtnr < 1) {
592 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
596 if (active->vtfd >= 0) {
597 session_leave_vt(active);
599 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
600 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
601 session_leave_vt(iter);
610 static int manager_connect_console(Manager *m) {
614 assert(m->console_active_fd < 0);
616 /* On certain architectures (S390 and Xen, and containers),
617 /dev/tty0 does not exist, so don't fail if we can't open
619 if (access("/dev/tty0", F_OK) < 0)
622 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
623 if (m->console_active_fd < 0) {
625 /* On some systems the device node /dev/tty0 may exist
626 * even though /sys/class/tty/tty0 does not. */
630 log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
634 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
636 log_error("Failed to watch foreground console");
641 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
642 * as VT-acquire signal. We ignore any acquire-events (yes, we still
643 * have to provide a valid signal-number for it!) and acknowledge all
644 * release events immediately.
647 if (SIGRTMIN + 1 > SIGRTMAX) {
648 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
652 r = ignore_signals(SIGRTMIN + 1, -1);
654 return log_error_errno(r, "Cannot ignore SIGRTMIN + 1: %m");
656 r = sigprocmask_many(SIG_BLOCK, SIGRTMIN, -1);
658 return log_error_errno(r, "Cannot block SIGRTMIN: %m");
660 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
667 static int manager_connect_udev(Manager *m) {
671 assert(!m->udev_seat_monitor);
672 assert(!m->udev_device_monitor);
673 assert(!m->udev_vcsa_monitor);
674 assert(!m->udev_button_monitor);
676 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
677 if (!m->udev_seat_monitor)
680 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
684 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
688 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);
692 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
693 if (!m->udev_device_monitor)
696 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
700 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
704 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
708 r = udev_monitor_enable_receiving(m->udev_device_monitor);
712 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);
716 /* Don't watch keys if nobody cares */
717 if (m->handle_power_key != HANDLE_IGNORE ||
718 m->handle_suspend_key != HANDLE_IGNORE ||
719 m->handle_hibernate_key != HANDLE_IGNORE ||
720 m->handle_lid_switch != HANDLE_IGNORE ||
721 m->handle_lid_switch_docked != HANDLE_IGNORE) {
723 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
724 if (!m->udev_button_monitor)
727 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
731 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
735 r = udev_monitor_enable_receiving(m->udev_button_monitor);
739 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);
747 void manager_gc(Manager *m, bool drop_not_started) {
754 while ((seat = m->seat_gc_queue)) {
755 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
756 seat->in_gc_queue = false;
758 if (!seat_check_gc(seat, drop_not_started)) {
759 seat_stop(seat, false);
764 while ((session = m->session_gc_queue)) {
765 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
766 session->in_gc_queue = false;
768 /* First, if we are not closing yet, initiate stopping */
769 if (!session_check_gc(session, drop_not_started) &&
770 session_get_state(session) != SESSION_CLOSING)
771 session_stop(session, false);
773 /* Normally, this should make the session busy again,
774 * if it doesn't then let's get rid of it
776 if (!session_check_gc(session, drop_not_started)) {
777 session_finalize(session);
778 session_free(session);
782 while ((user = m->user_gc_queue)) {
783 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
784 user->in_gc_queue = false;
786 /* First step: queue stop jobs */
787 if (!user_check_gc(user, drop_not_started))
788 user_stop(user, false);
790 /* Second step: finalize user */
791 if (!user_check_gc(user, drop_not_started)) {
798 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
799 Manager *m = userdata;
800 struct dual_timestamp since;
806 if (m->idle_action == HANDLE_IGNORE ||
807 m->idle_action_usec <= 0)
810 n = now(CLOCK_MONOTONIC);
812 r = manager_get_idle_hint(m, &since);
814 /* Not idle. Let's check if after a timeout it might be idle then. */
815 elapse = n + m->idle_action_usec;
817 /* Idle! Let's see if it's time to do something, or if
818 * we shall sleep for longer. */
820 if (n >= since.monotonic + m->idle_action_usec &&
821 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
822 log_info("System idle. Taking action.");
824 manager_handle_action(m, 0, m->idle_action, false, false);
825 m->idle_action_not_before_usec = n;
828 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
831 if (!m->idle_action_event_source) {
833 r = sd_event_add_time(
835 &m->idle_action_event_source,
837 elapse, USEC_PER_SEC*30,
838 manager_dispatch_idle_action, m);
840 return log_error_errno(r, "Failed to add idle event source: %m");
842 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
844 return log_error_errno(r, "Failed to set idle event source priority: %m");
846 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
848 return log_error_errno(r, "Failed to set idle event timer: %m");
850 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
852 return log_error_errno(r, "Failed to enable idle event timer: %m");
858 int manager_startup(Manager *m) {
864 Inhibitor *inhibitor;
869 /* Connect to console */
870 r = manager_connect_console(m);
874 /* Connect to udev */
875 r = manager_connect_udev(m);
877 return log_error_errno(r, "Failed to create udev watchers: %m");
879 /* Connect to the bus */
880 r = manager_connect_bus(m);
884 /* Instantiate magic seat 0 */
885 r = manager_add_seat(m, "seat0", &m->seat0);
887 return log_error_errno(r, "Failed to add seat0: %m");
889 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
891 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
893 /* Deserialize state */
894 r = manager_enumerate_devices(m);
896 log_warning_errno(r, "Device enumeration failed: %m");
898 r = manager_enumerate_seats(m);
900 log_warning_errno(r, "Seat enumeration failed: %m");
902 r = manager_enumerate_users(m);
904 log_warning_errno(r, "User enumeration failed: %m");
906 r = manager_enumerate_sessions(m);
908 log_warning_errno(r, "Session enumeration failed: %m");
910 r = manager_enumerate_inhibitors(m);
912 log_warning_errno(r, "Inhibitor enumeration failed: %m");
914 r = manager_enumerate_buttons(m);
916 log_warning_errno(r, "Button enumeration failed: %m");
918 /* Remove stale objects before we start them */
919 manager_gc(m, false);
921 /* And start everything */
922 HASHMAP_FOREACH(seat, m->seats, i)
925 HASHMAP_FOREACH(user, m->users, i)
928 HASHMAP_FOREACH(session, m->sessions, i)
929 session_start(session);
931 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
932 inhibitor_start(inhibitor);
934 HASHMAP_FOREACH(button, m->buttons, i)
935 button_check_switches(button);
937 manager_dispatch_idle_action(NULL, 0, m);
942 int manager_run(Manager *m) {
948 usec_t us = (uint64_t) -1;
950 r = sd_event_get_state(m->event);
953 if (r == SD_EVENT_FINISHED)
958 if (manager_dispatch_delayed(m) > 0)
961 if (m->action_what != 0) {
964 x = now(CLOCK_MONOTONIC);
965 y = m->action_timestamp + m->inhibit_delay_max;
967 us = x >= y ? 0 : y - x;
970 r = sd_event_run(m->event, us);
976 static int manager_parse_config_file(Manager *m) {
979 return config_parse_many("/etc/systemd/logind.conf",
980 CONF_DIRS_NULSTR("systemd/logind.conf"),
982 config_item_perf_lookup, logind_gperf_lookup,
986 int main(int argc, char *argv[]) {
990 log_set_target(LOG_TARGET_AUTO);
991 log_set_facility(LOG_AUTH);
992 log_parse_environment();
998 log_error("This program takes no arguments.");
1003 /* Always create the directories people can create inotify
1004 * watches in. Note that some applications might check for the
1005 * existence of /run/systemd/seats/ to determine whether
1006 * logind is available, so please always make sure this check
1008 mkdir_label("/run/systemd/seats", 0755);
1009 mkdir_label("/run/systemd/users", 0755);
1010 mkdir_label("/run/systemd/sessions", 0755);
1018 manager_parse_config_file(m);
1020 r = manager_startup(m);
1022 log_error_errno(r, "Failed to fully start up daemon: %m");
1026 log_debug("logind running as pid "PID_FMT, getpid());
1030 "STATUS=Processing requests...");
1034 log_debug("logind stopped as pid "PID_FMT, getpid());
1039 "STATUS=Shutting down...");
1044 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;