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/>.
28 #include "sd-daemon.h"
30 #include "conf-parser.h"
32 #include "bus-error.h"
33 #include "udev-util.h"
34 #include "formats-util.h"
35 #include "signal-util.h"
39 #include "mount-setup.h"
42 static void manager_free(Manager *m);
44 static Manager *manager_new(void) {
52 m->pin_cgroupfs_fd = -1;
54 m->console_active_fd = -1;
56 /// elogind does not support autospawning of vts
58 m->reserve_vt_fd = -1;
64 m->inhibit_delay_max = 5 * USEC_PER_SEC;
65 m->handle_power_key = HANDLE_POWEROFF;
66 m->handle_suspend_key = HANDLE_SUSPEND;
67 m->handle_hibernate_key = HANDLE_HIBERNATE;
68 m->handle_lid_switch = HANDLE_SUSPEND;
69 m->handle_lid_switch_docked = HANDLE_IGNORE;
70 m->lid_switch_ignore_inhibited = true;
71 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
73 m->idle_action_usec = 30 * USEC_PER_MINUTE;
74 m->idle_action = HANDLE_IGNORE;
75 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
77 m->runtime_dir_size = PAGE_ALIGN((size_t) (physical_memory() / 10)); /* 10% */
79 m->devices = hashmap_new(&string_hash_ops);
80 m->seats = hashmap_new(&string_hash_ops);
81 m->sessions = hashmap_new(&string_hash_ops);
82 m->users = hashmap_new(NULL);
83 m->inhibitors = hashmap_new(&string_hash_ops);
84 m->buttons = hashmap_new(&string_hash_ops);
86 m->user_units = hashmap_new(&string_hash_ops);
87 m->session_units = hashmap_new(&string_hash_ops);
89 m->running_as = MANAGER_SYSTEM;
92 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
95 m->kill_exclude_users = strv_new("root", NULL);
96 if (!m->kill_exclude_users)
99 /* If elogind should be its own controller, mount its cgroup */
100 if (streq(SYSTEMD_CGROUP_CONTROLLER, "name=elogind")) {
101 r = mount_setup(true);
107 r = manager_setup_cgroup(m);
111 m->suspend_mode = NULL;
112 m->suspend_state = strv_new("mem", "standby", "freeze", NULL);
113 if (!m->suspend_state)
115 m->hibernate_mode = strv_new("platform", "shutdown", NULL);
116 if (!m->hibernate_mode)
118 m->hibernate_state = strv_new("disk", NULL);
119 if (!m->hibernate_state)
121 m->hybrid_sleep_mode = strv_new("suspend", "platform", "shutdown", NULL);
122 if (!m->hybrid_sleep_mode)
124 m->hybrid_sleep_state = strv_new("disk", NULL);
125 if (!m->hybrid_sleep_state)
128 m->udev = udev_new();
132 r = sd_event_default(&m->event);
136 sd_event_set_watchdog(m->event, true);
145 static void manager_free(Manager *m) {
155 while ((session = hashmap_first(m->sessions)))
156 session_free(session);
158 while ((u = hashmap_first(m->users)))
161 while ((d = hashmap_first(m->devices)))
164 while ((s = hashmap_first(m->seats)))
167 while ((i = hashmap_first(m->inhibitors)))
170 while ((b = hashmap_first(m->buttons)))
173 hashmap_free(m->devices);
174 hashmap_free(m->seats);
175 hashmap_free(m->sessions);
176 hashmap_free(m->users);
177 hashmap_free(m->inhibitors);
178 hashmap_free(m->buttons);
180 hashmap_free(m->user_units);
181 hashmap_free(m->session_units);
183 sd_event_source_unref(m->idle_action_event_source);
184 sd_event_source_unref(m->inhibit_timeout_source);
185 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
186 sd_event_source_unref(m->nologin_timeout_source);
187 sd_event_source_unref(m->wall_message_timeout_source);
189 sd_event_source_unref(m->console_active_event_source);
190 sd_event_source_unref(m->udev_seat_event_source);
191 sd_event_source_unref(m->udev_device_event_source);
192 sd_event_source_unref(m->udev_vcsa_event_source);
193 sd_event_source_unref(m->udev_button_event_source);
194 sd_event_source_unref(m->lid_switch_ignore_event_source);
196 safe_close(m->console_active_fd);
198 udev_monitor_unref(m->udev_seat_monitor);
199 udev_monitor_unref(m->udev_device_monitor);
200 udev_monitor_unref(m->udev_vcsa_monitor);
201 udev_monitor_unref(m->udev_button_monitor);
205 if (m->unlink_nologin)
206 (void) unlink("/run/nologin");
208 bus_verify_polkit_async_registry_free(m->polkit_registry);
210 sd_bus_unref(m->bus);
211 sd_event_unref(m->event);
213 /// elogind does not support autospawning of vts
215 safe_close(m->reserve_vt_fd);
218 /* Avoid the creation of new processes forked by the
219 * kernel; at this point, we will not listen to the
221 if (detect_container() <= 0)
222 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
224 manager_shutdown_cgroup(m, true);
226 strv_free(m->kill_only_users);
227 strv_free(m->kill_exclude_users);
229 free(m->scheduled_shutdown_type);
230 free(m->scheduled_shutdown_tty);
231 free(m->wall_message);
233 strv_free(m->suspend_mode);
234 strv_free(m->suspend_state);
235 strv_free(m->hibernate_mode);
236 strv_free(m->hibernate_state);
237 strv_free(m->hybrid_sleep_mode);
238 strv_free(m->hybrid_sleep_state);
243 static int manager_enumerate_devices(Manager *m) {
244 struct udev_list_entry *item = NULL, *first = NULL;
245 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
250 /* Loads devices from udev and creates seats for them as
253 e = udev_enumerate_new(m->udev);
257 r = udev_enumerate_add_match_tag(e, "master-of-seat");
261 r = udev_enumerate_add_match_is_initialized(e);
265 r = udev_enumerate_scan_devices(e);
269 first = udev_enumerate_get_list_entry(e);
270 udev_list_entry_foreach(item, first) {
271 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
274 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
278 k = manager_process_seat_device(m, d);
286 static int manager_enumerate_buttons(Manager *m) {
287 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
288 struct udev_list_entry *item = NULL, *first = NULL;
293 /* Loads buttons from udev */
295 if (m->handle_power_key == HANDLE_IGNORE &&
296 m->handle_suspend_key == HANDLE_IGNORE &&
297 m->handle_hibernate_key == HANDLE_IGNORE &&
298 m->handle_lid_switch == HANDLE_IGNORE &&
299 m->handle_lid_switch_docked == HANDLE_IGNORE)
302 e = udev_enumerate_new(m->udev);
306 r = udev_enumerate_add_match_subsystem(e, "input");
310 r = udev_enumerate_add_match_tag(e, "power-switch");
314 r = udev_enumerate_add_match_is_initialized(e);
318 r = udev_enumerate_scan_devices(e);
322 first = udev_enumerate_get_list_entry(e);
323 udev_list_entry_foreach(item, first) {
324 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
327 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
331 k = manager_process_button_device(m, d);
339 static int manager_enumerate_seats(Manager *m) {
340 _cleanup_closedir_ DIR *d = NULL;
346 /* This loads data about seats stored on disk, but does not
347 * actually create any seats. Removes data of seats that no
350 d = opendir("/run/systemd/seats");
355 log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
359 FOREACH_DIRENT(de, d, return -errno) {
363 if (!dirent_is_file(de))
366 s = hashmap_get(m->seats, de->d_name);
368 unlinkat(dirfd(d), de->d_name, 0);
380 static int manager_enumerate_linger_users(Manager *m) {
381 _cleanup_closedir_ DIR *d = NULL;
387 d = opendir("/var/lib/systemd/linger");
392 log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
396 FOREACH_DIRENT(de, d, return -errno) {
399 if (!dirent_is_file(de))
402 k = manager_add_user_by_name(m, de->d_name, NULL);
404 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
412 static int manager_enumerate_users(Manager *m) {
413 _cleanup_closedir_ DIR *d = NULL;
419 /* Add lingering users */
420 r = manager_enumerate_linger_users(m);
422 /* Read in user data stored on disk */
423 d = opendir("/run/systemd/users");
428 log_error_errno(errno, "Failed to open /run/systemd/users: %m");
432 FOREACH_DIRENT(de, d, return -errno) {
435 if (!dirent_is_file(de))
438 k = manager_add_user_by_name(m, de->d_name, &u);
440 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
446 user_add_to_gc_queue(u);
456 static int manager_enumerate_sessions(Manager *m) {
457 _cleanup_closedir_ DIR *d = NULL;
463 /* Read in session data stored on disk */
464 d = opendir("/run/systemd/sessions");
469 log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
473 FOREACH_DIRENT(de, d, return -errno) {
477 if (!dirent_is_file(de))
480 if (!session_id_valid(de->d_name)) {
481 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
486 k = manager_add_session(m, de->d_name, &s);
488 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
494 session_add_to_gc_queue(s);
504 static int manager_enumerate_inhibitors(Manager *m) {
505 _cleanup_closedir_ DIR *d = NULL;
511 d = opendir("/run/systemd/inhibit");
516 log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
520 FOREACH_DIRENT(de, d, return -errno) {
524 if (!dirent_is_file(de))
527 k = manager_add_inhibitor(m, de->d_name, &i);
529 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
534 k = inhibitor_load(i);
542 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
543 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
544 Manager *m = userdata;
548 d = udev_monitor_receive_device(m->udev_seat_monitor);
552 manager_process_seat_device(m, d);
556 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
557 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
558 Manager *m = userdata;
562 d = udev_monitor_receive_device(m->udev_device_monitor);
566 manager_process_seat_device(m, d);
570 /// UNNEEDED by elogind
572 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
573 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
574 Manager *m = userdata;
579 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
583 name = udev_device_get_sysname(d);
585 /* Whenever a VCSA device is removed try to reallocate our
586 * VTs, to make sure our auto VTs never go away. */
588 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
589 seat_preallocate_vts(m->seat0);
595 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
596 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
597 Manager *m = userdata;
601 d = udev_monitor_receive_device(m->udev_button_monitor);
605 manager_process_button_device(m, d);
609 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
610 Manager *m = userdata;
614 assert(m->console_active_fd == fd);
616 seat_read_active_vt(m->seat0);
620 /// UNNEEDED by elogind
622 static int manager_reserve_vt(Manager *m) {
623 _cleanup_free_ char *p = NULL;
627 if (m->reserve_vt <= 0)
630 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
633 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
634 if (m->reserve_vt_fd < 0) {
636 /* Don't complain on VT-less systems */
638 log_warning_errno(errno, "Failed to pin reserved VT: %m");
646 static int signal_agent_released(sd_bus_message *message, void *userdata, sd_bus_error *error) {
647 Manager *m = userdata;
655 r = sd_bus_message_read(message, "s", &cgroup);
657 bus_log_parse_error(r);
661 s = hashmap_get(m->sessions, cgroup);
664 log_warning("Session not found: %s", cgroup);
674 static int manager_connect_bus(Manager *m) {
675 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
681 r = sd_bus_default_system(&m->bus);
683 return log_error_errno(r, "Failed to connect to system bus: %m");
685 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
687 return log_error_errno(r, "Failed to add manager object vtable: %m");
689 /* elogind relies on signals from its release agent */
690 r = sd_bus_add_match(m->bus, NULL,
692 "interface='org.freedesktop.elogind.Agent',"
694 "path='/org/freedesktop/elogind/agent'",
695 signal_agent_released, m);
697 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
699 return log_error_errno(r, "Failed to add seat object vtable: %m");
701 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
703 return log_error_errno(r, "Failed to add seat enumerator: %m");
705 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
707 return log_error_errno(r, "Failed to add session object vtable: %m");
709 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
711 return log_error_errno(r, "Failed to add session enumerator: %m");
713 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
715 return log_error_errno(r, "Failed to add user object vtable: %m");
717 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
719 return log_error_errno(r, "Failed to add user enumerator: %m");
721 /// elogind does not support systemd as PID 1
723 r = sd_bus_add_match(m->bus,
726 "sender='org.freedesktop.systemd1',"
727 "interface='org.freedesktop.systemd1.Manager',"
728 "member='JobRemoved',"
729 "path='/org/freedesktop/systemd1'",
730 match_job_removed, m);
732 log_warning_errno(r, "Failed to add match for JobRemoved: %m");
734 r = sd_bus_add_match(m->bus,
737 "sender='org.freedesktop.systemd1',"
738 "interface='org.freedesktop.systemd1.Manager',"
739 "member='UnitRemoved',"
740 "path='/org/freedesktop/systemd1'",
741 match_unit_removed, m);
743 log_warning_errno(r, "Failed to add match for UnitRemoved: %m");
745 r = sd_bus_add_match(m->bus,
748 "sender='org.freedesktop.systemd1',"
749 "interface='org.freedesktop.DBus.Properties',"
750 "member='PropertiesChanged'",
751 match_properties_changed, m);
753 log_warning_errno(r, "Failed to add match for PropertiesChanged: %m");
755 r = sd_bus_add_match(m->bus,
758 "sender='org.freedesktop.systemd1',"
759 "interface='org.freedesktop.systemd1.Manager',"
760 "member='Reloading',"
761 "path='/org/freedesktop/systemd1'",
764 log_warning_errno(r, "Failed to add match for Reloading: %m");
766 r = sd_bus_call_method(
768 "org.freedesktop.systemd1",
769 "/org/freedesktop/systemd1",
770 "org.freedesktop.systemd1.Manager",
775 log_notice("Failed to enable subscription: %s", bus_error_message(&error, r));
778 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
780 return log_error_errno(r, "Failed to register name: %m");
782 r = sd_bus_attach_event(m->bus, m->event, 0);
784 return log_error_errno(r, "Failed to attach bus to event loop: %m");
789 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
791 Session *active, *iter;
794 * We got a VT-switch signal and we have to acknowledge it immediately.
795 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
796 * old user-space might run multiple sessions on a single VT, *sigh*.
797 * Therefore, we have to iterate all sessions and find one with a vtfd
798 * on the requested VT.
799 * As only VTs with active controllers have VT_PROCESS set, our current
800 * notion of the active VT might be wrong (for instance if the switch
801 * happens while we setup VT_PROCESS). Therefore, read the current VT
802 * first and then use s->active->vtnr as reference. Note that this is
803 * not racy, as no further VT-switch can happen as long as we're in
804 * synchronous VT_PROCESS mode.
808 seat_read_active_vt(m->seat0);
810 active = m->seat0->active;
811 if (!active || active->vtnr < 1) {
812 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
816 if (active->vtfd >= 0) {
817 session_leave_vt(active);
819 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
820 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
821 session_leave_vt(iter);
830 static int manager_connect_console(Manager *m) {
834 assert(m->console_active_fd < 0);
836 /* On certain architectures (S390 and Xen, and containers),
837 /dev/tty0 does not exist, so don't fail if we can't open
839 if (access("/dev/tty0", F_OK) < 0)
842 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
843 if (m->console_active_fd < 0) {
845 /* On some systems the device node /dev/tty0 may exist
846 * even though /sys/class/tty/tty0 does not. */
850 log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
854 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
856 log_error("Failed to watch foreground console");
861 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
862 * as VT-acquire signal. We ignore any acquire-events (yes, we still
863 * have to provide a valid signal-number for it!) and acknowledge all
864 * release events immediately.
867 if (SIGRTMIN + 1 > SIGRTMAX) {
868 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
872 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
873 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
875 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
882 static int manager_connect_udev(Manager *m) {
886 assert(!m->udev_seat_monitor);
887 assert(!m->udev_device_monitor);
888 assert(!m->udev_vcsa_monitor);
889 assert(!m->udev_button_monitor);
891 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
892 if (!m->udev_seat_monitor)
895 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
899 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
903 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);
907 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
908 if (!m->udev_device_monitor)
911 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
915 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
919 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
923 r = udev_monitor_enable_receiving(m->udev_device_monitor);
927 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);
931 /* Don't watch keys if nobody cares */
932 if (m->handle_power_key != HANDLE_IGNORE ||
933 m->handle_suspend_key != HANDLE_IGNORE ||
934 m->handle_hibernate_key != HANDLE_IGNORE ||
935 m->handle_lid_switch != HANDLE_IGNORE ||
936 m->handle_lid_switch_docked != HANDLE_IGNORE) {
938 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
939 if (!m->udev_button_monitor)
942 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
946 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
950 r = udev_monitor_enable_receiving(m->udev_button_monitor);
954 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);
959 /* Don't bother watching VCSA devices, if nobody cares */
960 /// elogind does not support autospawning of vts
962 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
964 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
965 if (!m->udev_vcsa_monitor)
968 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
972 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
976 r = sd_event_add_io(m->event, &m->udev_vcsa_event_source, udev_monitor_get_fd(m->udev_vcsa_monitor), EPOLLIN, manager_dispatch_vcsa_udev, m);
985 static void manager_gc(Manager *m, bool drop_not_started) {
992 while ((seat = m->seat_gc_queue)) {
993 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
994 seat->in_gc_queue = false;
996 if (!seat_check_gc(seat, drop_not_started)) {
997 seat_stop(seat, false);
1002 while ((session = m->session_gc_queue)) {
1003 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1004 session->in_gc_queue = false;
1006 /* First, if we are not closing yet, initiate stopping */
1007 if (!session_check_gc(session, drop_not_started) &&
1008 session_get_state(session) != SESSION_CLOSING)
1009 session_stop(session, false);
1011 /* Normally, this should make the session referenced
1012 * again, if it doesn't then let's get rid of it
1014 if (!session_check_gc(session, drop_not_started)) {
1015 session_finalize(session);
1016 session_free(session);
1020 while ((user = m->user_gc_queue)) {
1021 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1022 user->in_gc_queue = false;
1024 /* First step: queue stop jobs */
1025 if (!user_check_gc(user, drop_not_started))
1026 user_stop(user, false);
1028 /* Second step: finalize user */
1029 if (!user_check_gc(user, drop_not_started)) {
1030 user_finalize(user);
1036 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1037 Manager *m = userdata;
1038 struct dual_timestamp since;
1044 if (m->idle_action == HANDLE_IGNORE ||
1045 m->idle_action_usec <= 0)
1048 n = now(CLOCK_MONOTONIC);
1050 r = manager_get_idle_hint(m, &since);
1052 /* Not idle. Let's check if after a timeout it might be idle then. */
1053 elapse = n + m->idle_action_usec;
1055 /* Idle! Let's see if it's time to do something, or if
1056 * we shall sleep for longer. */
1058 if (n >= since.monotonic + m->idle_action_usec &&
1059 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1060 log_info("System idle. Taking action.");
1062 manager_handle_action(m, 0, m->idle_action, false, false);
1063 m->idle_action_not_before_usec = n;
1066 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1069 if (!m->idle_action_event_source) {
1071 r = sd_event_add_time(
1073 &m->idle_action_event_source,
1075 elapse, USEC_PER_SEC*30,
1076 manager_dispatch_idle_action, m);
1078 return log_error_errno(r, "Failed to add idle event source: %m");
1080 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1082 return log_error_errno(r, "Failed to set idle event source priority: %m");
1084 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1086 return log_error_errno(r, "Failed to set idle event timer: %m");
1088 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1090 return log_error_errno(r, "Failed to enable idle event timer: %m");
1096 static int manager_startup(Manager *m) {
1102 Inhibitor *inhibitor;
1107 /* Connect to console */
1108 r = manager_connect_console(m);
1112 /* Connect to udev */
1113 r = manager_connect_udev(m);
1115 return log_error_errno(r, "Failed to create udev watchers: %m");
1117 /* Connect to the bus */
1118 r = manager_connect_bus(m);
1122 /* Instantiate magic seat 0 */
1123 r = manager_add_seat(m, "seat0", &m->seat0);
1125 return log_error_errno(r, "Failed to add seat0: %m");
1127 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1129 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1131 /* Deserialize state */
1132 r = manager_enumerate_devices(m);
1134 log_warning_errno(r, "Device enumeration failed: %m");
1136 r = manager_enumerate_seats(m);
1138 log_warning_errno(r, "Seat enumeration failed: %m");
1140 r = manager_enumerate_users(m);
1142 log_warning_errno(r, "User enumeration failed: %m");
1144 r = manager_enumerate_sessions(m);
1146 log_warning_errno(r, "Session enumeration failed: %m");
1148 r = manager_enumerate_inhibitors(m);
1150 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1152 r = manager_enumerate_buttons(m);
1154 log_warning_errno(r, "Button enumeration failed: %m");
1156 /* Remove stale objects before we start them */
1157 manager_gc(m, false);
1159 /* Reserve the special reserved VT */
1160 /// elogind does not support autospawning of vts
1162 manager_reserve_vt(m);
1165 /* And start everything */
1166 HASHMAP_FOREACH(seat, m->seats, i)
1169 HASHMAP_FOREACH(user, m->users, i)
1172 HASHMAP_FOREACH(session, m->sessions, i)
1173 session_start(session);
1175 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1176 inhibitor_start(inhibitor);
1178 HASHMAP_FOREACH(button, m->buttons, i)
1179 button_check_switches(button);
1181 manager_dispatch_idle_action(NULL, 0, m);
1186 static int manager_run(Manager *m) {
1192 r = sd_event_get_state(m->event);
1195 if (r == SD_EVENT_FINISHED)
1198 manager_gc(m, true);
1200 r = manager_dispatch_delayed(m, false);
1206 r = sd_event_run(m->event, (uint64_t) -1);
1212 static int manager_parse_config_file(Manager *m) {
1213 const char *unit = NULL, *logind_conf, *sections;
1215 bool relaxed = false, allow_include = false, warn = true;
1219 /// elogind parses its own config file
1221 return config_parse_many("/etc/systemd/logind.conf",
1222 CONF_DIRS_NULSTR("systemd/logind.conf"),
1224 config_item_perf_lookup, logind_gperf_lookup,
1228 logind_conf = getenv("ELOGIND_CONF_FILE");
1230 logind_conf = PKGSYSCONFDIR "/logind.conf";
1231 sections = "Login\0Sleep\0";
1233 return config_parse(unit, logind_conf, file, sections,
1234 config_item_perf_lookup, logind_gperf_lookup,
1235 relaxed, allow_include, warn, m);
1238 int main(int argc, char *argv[]) {
1242 elogind_set_program_name(argv[0]);
1243 log_set_target(LOG_TARGET_AUTO);
1244 log_set_facility(LOG_AUTH);
1245 log_parse_environment();
1248 #ifdef ENABLE_DEBUG_ELOGIND
1249 log_set_max_level(LOG_DEBUG);
1250 #endif // ENABLE_DEBUG_ELOGIND
1255 log_error("This program takes no arguments.");
1260 /* Always create the directories people can create inotify
1261 * watches in. Note that some applications might check for the
1262 * existence of /run/systemd/seats/ to determine whether
1263 * logind is available, so please always make sure this check
1265 r = mkdir_label("/run/systemd", 0755);
1266 if ( (r < 0) && (-EEXIST != r) )
1267 return log_error_errno(r, "Failed to create /run/systemd : %m");
1268 r = mkdir_label("/run/systemd/seats", 0755);
1269 if ( r < 0 && (-EEXIST != r) )
1270 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1271 r = mkdir_label("/run/systemd/users", 0755);
1272 if ( r < 0 && (-EEXIST != r) )
1273 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1274 r = mkdir_label("/run/systemd/sessions", 0755);
1275 if ( r < 0 && (-EEXIST != r) )
1276 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1277 r = mkdir_label("/run/systemd/machines", 0755);
1278 if ( r < 0 && (-EEXIST != r) )
1279 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1287 manager_parse_config_file(m);
1289 r = manager_startup(m);
1291 log_error_errno(r, "Failed to fully start up daemon: %m");
1295 log_debug("logind running as pid "PID_FMT, getpid());
1299 "STATUS=Processing requests...");
1303 log_debug("logind stopped as pid "PID_FMT, getpid());
1308 "STATUS=Shutting down...");
1312 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;