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 "alloc-util.h"
31 #include "bus-error.h"
33 #include "conf-parser.h"
35 #include "dirent-util.h"
37 #include "formats-util.h"
39 #include "signal-util.h"
41 #include "udev-util.h"
43 /// additional includes elogind needs
44 #include "cgroup.h" // From src/core/
46 #include "mount-setup.h" // From src/core
47 #include "musl_missing.h"
49 static void manager_free(Manager *m);
51 static Manager *manager_new(void) {
59 m->pin_cgroupfs_fd = -1;
61 m->console_active_fd = -1;
63 /// elogind does not support autospawning of vts
65 m->reserve_vt_fd = -1;
71 m->inhibit_delay_max = 5 * USEC_PER_SEC;
72 m->handle_power_key = HANDLE_POWEROFF;
73 m->handle_suspend_key = HANDLE_SUSPEND;
74 m->handle_hibernate_key = HANDLE_HIBERNATE;
75 m->handle_lid_switch = HANDLE_SUSPEND;
76 m->handle_lid_switch_docked = HANDLE_IGNORE;
77 m->lid_switch_ignore_inhibited = true;
78 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
80 m->idle_action_usec = 30 * USEC_PER_MINUTE;
81 m->idle_action = HANDLE_IGNORE;
82 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
84 m->runtime_dir_size = PAGE_ALIGN((size_t) (physical_memory() / 10)); /* 10% */
85 m->user_tasks_max = UINT64_C(4096);
87 m->devices = hashmap_new(&string_hash_ops);
88 m->seats = hashmap_new(&string_hash_ops);
89 m->sessions = hashmap_new(&string_hash_ops);
90 m->users = hashmap_new(NULL);
91 m->inhibitors = hashmap_new(&string_hash_ops);
92 m->buttons = hashmap_new(&string_hash_ops);
94 m->user_units = hashmap_new(&string_hash_ops);
95 m->session_units = hashmap_new(&string_hash_ops);
97 m->running_as = MANAGER_SYSTEM;
100 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
103 m->kill_exclude_users = strv_new("root", NULL);
104 if (!m->kill_exclude_users)
107 /* If elogind should be its own controller, mount its cgroup */
108 if (streq(SYSTEMD_CGROUP_CONTROLLER, "name=elogind")) {
109 r = mount_setup(true);
115 r = manager_setup_cgroup(m);
119 m->suspend_mode = NULL;
120 m->suspend_state = strv_new("mem", "standby", "freeze", NULL);
121 if (!m->suspend_state)
123 m->hibernate_mode = strv_new("platform", "shutdown", NULL);
124 if (!m->hibernate_mode)
126 m->hibernate_state = strv_new("disk", NULL);
127 if (!m->hibernate_state)
129 m->hybrid_sleep_mode = strv_new("suspend", "platform", "shutdown", NULL);
130 if (!m->hybrid_sleep_mode)
132 m->hybrid_sleep_state = strv_new("disk", NULL);
133 if (!m->hybrid_sleep_state)
136 m->udev = udev_new();
140 r = sd_event_default(&m->event);
144 sd_event_set_watchdog(m->event, true);
153 static void manager_free(Manager *m) {
163 while ((session = hashmap_first(m->sessions)))
164 session_free(session);
166 while ((u = hashmap_first(m->users)))
169 while ((d = hashmap_first(m->devices)))
172 while ((s = hashmap_first(m->seats)))
175 while ((i = hashmap_first(m->inhibitors)))
178 while ((b = hashmap_first(m->buttons)))
181 hashmap_free(m->devices);
182 hashmap_free(m->seats);
183 hashmap_free(m->sessions);
184 hashmap_free(m->users);
185 hashmap_free(m->inhibitors);
186 hashmap_free(m->buttons);
188 hashmap_free(m->user_units);
189 hashmap_free(m->session_units);
191 sd_event_source_unref(m->idle_action_event_source);
192 sd_event_source_unref(m->inhibit_timeout_source);
193 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
194 sd_event_source_unref(m->nologin_timeout_source);
195 sd_event_source_unref(m->wall_message_timeout_source);
197 sd_event_source_unref(m->console_active_event_source);
198 sd_event_source_unref(m->udev_seat_event_source);
199 sd_event_source_unref(m->udev_device_event_source);
200 sd_event_source_unref(m->udev_vcsa_event_source);
201 sd_event_source_unref(m->udev_button_event_source);
202 sd_event_source_unref(m->lid_switch_ignore_event_source);
204 safe_close(m->console_active_fd);
206 udev_monitor_unref(m->udev_seat_monitor);
207 udev_monitor_unref(m->udev_device_monitor);
208 udev_monitor_unref(m->udev_vcsa_monitor);
209 udev_monitor_unref(m->udev_button_monitor);
213 if (m->unlink_nologin)
214 (void) unlink("/run/nologin");
216 bus_verify_polkit_async_registry_free(m->polkit_registry);
218 sd_bus_unref(m->bus);
219 sd_event_unref(m->event);
221 /// elogind does not support autospawning of vts
223 safe_close(m->reserve_vt_fd);
226 manager_shutdown_cgroup(m, true);
228 strv_free(m->kill_only_users);
229 strv_free(m->kill_exclude_users);
231 free(m->scheduled_shutdown_type);
232 free(m->scheduled_shutdown_tty);
233 free(m->wall_message);
235 strv_free(m->suspend_mode);
236 strv_free(m->suspend_state);
237 strv_free(m->hibernate_mode);
238 strv_free(m->hibernate_state);
239 strv_free(m->hybrid_sleep_mode);
240 strv_free(m->hybrid_sleep_state);
245 static int manager_enumerate_devices(Manager *m) {
246 struct udev_list_entry *item = NULL, *first = NULL;
247 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
252 /* Loads devices from udev and creates seats for them as
255 e = udev_enumerate_new(m->udev);
259 r = udev_enumerate_add_match_tag(e, "master-of-seat");
263 r = udev_enumerate_add_match_is_initialized(e);
267 r = udev_enumerate_scan_devices(e);
271 first = udev_enumerate_get_list_entry(e);
272 udev_list_entry_foreach(item, first) {
273 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
276 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
280 k = manager_process_seat_device(m, d);
288 static int manager_enumerate_buttons(Manager *m) {
289 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
290 struct udev_list_entry *item = NULL, *first = NULL;
295 /* Loads buttons from udev */
297 if (m->handle_power_key == HANDLE_IGNORE &&
298 m->handle_suspend_key == HANDLE_IGNORE &&
299 m->handle_hibernate_key == HANDLE_IGNORE &&
300 m->handle_lid_switch == HANDLE_IGNORE &&
301 m->handle_lid_switch_docked == HANDLE_IGNORE)
304 e = udev_enumerate_new(m->udev);
308 r = udev_enumerate_add_match_subsystem(e, "input");
312 r = udev_enumerate_add_match_tag(e, "power-switch");
316 r = udev_enumerate_add_match_is_initialized(e);
320 r = udev_enumerate_scan_devices(e);
324 first = udev_enumerate_get_list_entry(e);
325 udev_list_entry_foreach(item, first) {
326 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
329 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
333 k = manager_process_button_device(m, d);
341 static int manager_enumerate_seats(Manager *m) {
342 _cleanup_closedir_ DIR *d = NULL;
348 /* This loads data about seats stored on disk, but does not
349 * actually create any seats. Removes data of seats that no
352 d = opendir("/run/systemd/seats");
357 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
360 FOREACH_DIRENT(de, d, return -errno) {
364 if (!dirent_is_file(de))
367 s = hashmap_get(m->seats, de->d_name);
369 unlinkat(dirfd(d), de->d_name, 0);
381 static int manager_enumerate_linger_users(Manager *m) {
382 _cleanup_closedir_ DIR *d = NULL;
388 d = opendir("/var/lib/systemd/linger");
393 return 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 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
431 FOREACH_DIRENT(de, d, return -errno) {
434 if (!dirent_is_file(de))
437 k = manager_add_user_by_name(m, de->d_name, &u);
439 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
445 user_add_to_gc_queue(u);
455 static int manager_enumerate_sessions(Manager *m) {
456 _cleanup_closedir_ DIR *d = NULL;
462 /* Read in session data stored on disk */
463 d = opendir("/run/systemd/sessions");
468 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
471 FOREACH_DIRENT(de, d, return -errno) {
475 if (!dirent_is_file(de))
478 if (!session_id_valid(de->d_name)) {
479 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
484 k = manager_add_session(m, de->d_name, &s);
486 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
492 session_add_to_gc_queue(s);
502 static int manager_enumerate_inhibitors(Manager *m) {
503 _cleanup_closedir_ DIR *d = NULL;
509 d = opendir("/run/systemd/inhibit");
514 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
517 FOREACH_DIRENT(de, d, return -errno) {
521 if (!dirent_is_file(de))
524 k = manager_add_inhibitor(m, de->d_name, &i);
526 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
531 k = inhibitor_load(i);
539 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
540 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
541 Manager *m = userdata;
545 d = udev_monitor_receive_device(m->udev_seat_monitor);
549 manager_process_seat_device(m, d);
553 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
554 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
555 Manager *m = userdata;
559 d = udev_monitor_receive_device(m->udev_device_monitor);
563 manager_process_seat_device(m, d);
567 /// UNNEEDED by elogind
569 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
570 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
571 Manager *m = userdata;
576 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
580 name = udev_device_get_sysname(d);
582 /* Whenever a VCSA device is removed try to reallocate our
583 * VTs, to make sure our auto VTs never go away. */
585 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
586 seat_preallocate_vts(m->seat0);
592 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
593 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
594 Manager *m = userdata;
598 d = udev_monitor_receive_device(m->udev_button_monitor);
602 manager_process_button_device(m, d);
606 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
607 Manager *m = userdata;
611 assert(m->console_active_fd == fd);
613 seat_read_active_vt(m->seat0);
617 /// UNNEEDED by elogind
619 static int manager_reserve_vt(Manager *m) {
620 _cleanup_free_ char *p = NULL;
624 if (m->reserve_vt <= 0)
627 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
630 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
631 if (m->reserve_vt_fd < 0) {
633 /* Don't complain on VT-less systems */
635 log_warning_errno(errno, "Failed to pin reserved VT: %m");
643 static int signal_agent_released(sd_bus_message *message, void *userdata, sd_bus_error *error) {
644 Manager *m = userdata;
652 r = sd_bus_message_read(message, "s", &cgroup);
654 bus_log_parse_error(r);
658 s = hashmap_get(m->sessions, cgroup);
661 log_warning("Session not found: %s", cgroup);
671 static int manager_connect_bus(Manager *m) {
672 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
678 r = sd_bus_default_system(&m->bus);
680 return log_error_errno(r, "Failed to connect to system bus: %m");
682 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
684 return log_error_errno(r, "Failed to add manager object vtable: %m");
686 /* elogind relies on signals from its release agent */
687 r = sd_bus_add_match(m->bus, NULL,
689 "interface='org.freedesktop.elogind.Agent',"
691 "path='/org/freedesktop/elogind/agent'",
692 signal_agent_released, m);
694 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
696 return log_error_errno(r, "Failed to add seat object vtable: %m");
698 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
700 return log_error_errno(r, "Failed to add seat enumerator: %m");
702 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
704 return log_error_errno(r, "Failed to add session object vtable: %m");
706 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
708 return log_error_errno(r, "Failed to add session enumerator: %m");
710 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
712 return log_error_errno(r, "Failed to add user object vtable: %m");
714 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
716 return log_error_errno(r, "Failed to add user enumerator: %m");
718 /// elogind does not support systemd as PID 1
720 r = sd_bus_add_match(m->bus,
723 "sender='org.freedesktop.systemd1',"
724 "interface='org.freedesktop.systemd1.Manager',"
725 "member='JobRemoved',"
726 "path='/org/freedesktop/systemd1'",
727 match_job_removed, m);
729 return log_error_errno(r, "Failed to add match for JobRemoved: %m");
731 r = sd_bus_add_match(m->bus,
734 "sender='org.freedesktop.systemd1',"
735 "interface='org.freedesktop.systemd1.Manager',"
736 "member='UnitRemoved',"
737 "path='/org/freedesktop/systemd1'",
738 match_unit_removed, m);
740 return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
742 r = sd_bus_add_match(m->bus,
745 "sender='org.freedesktop.systemd1',"
746 "interface='org.freedesktop.DBus.Properties',"
747 "member='PropertiesChanged'",
748 match_properties_changed, m);
750 return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
752 r = sd_bus_add_match(m->bus,
755 "sender='org.freedesktop.systemd1',"
756 "interface='org.freedesktop.systemd1.Manager',"
757 "member='Reloading',"
758 "path='/org/freedesktop/systemd1'",
761 return log_error_errno(r, "Failed to add match for Reloading: %m");
763 r = sd_bus_call_method(
765 "org.freedesktop.systemd1",
766 "/org/freedesktop/systemd1",
767 "org.freedesktop.systemd1.Manager",
772 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
777 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
779 return log_error_errno(r, "Failed to register name: %m");
781 r = sd_bus_attach_event(m->bus, m->event, 0);
783 return log_error_errno(r, "Failed to attach bus to event loop: %m");
788 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
790 Session *active, *iter;
793 * We got a VT-switch signal and we have to acknowledge it immediately.
794 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
795 * old user-space might run multiple sessions on a single VT, *sigh*.
796 * Therefore, we have to iterate all sessions and find one with a vtfd
797 * on the requested VT.
798 * As only VTs with active controllers have VT_PROCESS set, our current
799 * notion of the active VT might be wrong (for instance if the switch
800 * happens while we setup VT_PROCESS). Therefore, read the current VT
801 * first and then use s->active->vtnr as reference. Note that this is
802 * not racy, as no further VT-switch can happen as long as we're in
803 * synchronous VT_PROCESS mode.
807 seat_read_active_vt(m->seat0);
809 active = m->seat0->active;
810 if (!active || active->vtnr < 1) {
811 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
815 if (active->vtfd >= 0) {
816 session_leave_vt(active);
818 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
819 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
820 session_leave_vt(iter);
829 static int manager_connect_console(Manager *m) {
833 assert(m->console_active_fd < 0);
835 /* On certain architectures (S390 and Xen, and containers),
836 /dev/tty0 does not exist, so don't fail if we can't open
838 if (access("/dev/tty0", F_OK) < 0)
841 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
842 if (m->console_active_fd < 0) {
844 /* On some systems the device node /dev/tty0 may exist
845 * even though /sys/class/tty/tty0 does not. */
849 return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
852 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
854 log_error("Failed to watch foreground console");
859 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
860 * as VT-acquire signal. We ignore any acquire-events (yes, we still
861 * have to provide a valid signal-number for it!) and acknowledge all
862 * release events immediately.
865 if (SIGRTMIN + 1 > SIGRTMAX) {
866 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
870 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
871 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
873 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
880 static int manager_connect_udev(Manager *m) {
884 assert(!m->udev_seat_monitor);
885 assert(!m->udev_device_monitor);
886 assert(!m->udev_vcsa_monitor);
887 assert(!m->udev_button_monitor);
889 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
890 if (!m->udev_seat_monitor)
893 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
897 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
901 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);
905 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
906 if (!m->udev_device_monitor)
909 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
913 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
917 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
921 r = udev_monitor_enable_receiving(m->udev_device_monitor);
925 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);
929 /* Don't watch keys if nobody cares */
930 if (m->handle_power_key != HANDLE_IGNORE ||
931 m->handle_suspend_key != HANDLE_IGNORE ||
932 m->handle_hibernate_key != HANDLE_IGNORE ||
933 m->handle_lid_switch != HANDLE_IGNORE ||
934 m->handle_lid_switch_docked != HANDLE_IGNORE) {
936 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
937 if (!m->udev_button_monitor)
940 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
944 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
948 r = udev_monitor_enable_receiving(m->udev_button_monitor);
952 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);
957 /* Don't bother watching VCSA devices, if nobody cares */
958 /// elogind does not support autospawning of vts
960 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
962 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
963 if (!m->udev_vcsa_monitor)
966 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
970 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
974 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);
983 static void manager_gc(Manager *m, bool drop_not_started) {
990 while ((seat = m->seat_gc_queue)) {
991 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
992 seat->in_gc_queue = false;
994 if (!seat_check_gc(seat, drop_not_started)) {
995 seat_stop(seat, false);
1000 while ((session = m->session_gc_queue)) {
1001 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1002 session->in_gc_queue = false;
1004 /* First, if we are not closing yet, initiate stopping */
1005 if (!session_check_gc(session, drop_not_started) &&
1006 session_get_state(session) != SESSION_CLOSING)
1007 session_stop(session, false);
1009 /* Normally, this should make the session referenced
1010 * again, if it doesn't then let's get rid of it
1012 if (!session_check_gc(session, drop_not_started)) {
1013 session_finalize(session);
1014 session_free(session);
1018 while ((user = m->user_gc_queue)) {
1019 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1020 user->in_gc_queue = false;
1022 /* First step: queue stop jobs */
1023 if (!user_check_gc(user, drop_not_started))
1024 user_stop(user, false);
1026 /* Second step: finalize user */
1027 if (!user_check_gc(user, drop_not_started)) {
1028 user_finalize(user);
1034 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1035 Manager *m = userdata;
1036 struct dual_timestamp since;
1042 if (m->idle_action == HANDLE_IGNORE ||
1043 m->idle_action_usec <= 0)
1046 n = now(CLOCK_MONOTONIC);
1048 r = manager_get_idle_hint(m, &since);
1050 /* Not idle. Let's check if after a timeout it might be idle then. */
1051 elapse = n + m->idle_action_usec;
1053 /* Idle! Let's see if it's time to do something, or if
1054 * we shall sleep for longer. */
1056 if (n >= since.monotonic + m->idle_action_usec &&
1057 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1058 log_info("System idle. Taking action.");
1060 manager_handle_action(m, 0, m->idle_action, false, false);
1061 m->idle_action_not_before_usec = n;
1064 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1067 if (!m->idle_action_event_source) {
1069 r = sd_event_add_time(
1071 &m->idle_action_event_source,
1073 elapse, USEC_PER_SEC*30,
1074 manager_dispatch_idle_action, m);
1076 return log_error_errno(r, "Failed to add idle event source: %m");
1078 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1080 return log_error_errno(r, "Failed to set idle event source priority: %m");
1082 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1084 return log_error_errno(r, "Failed to set idle event timer: %m");
1086 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1088 return log_error_errno(r, "Failed to enable idle event timer: %m");
1094 static int manager_startup(Manager *m) {
1100 Inhibitor *inhibitor;
1105 /* Connect to console */
1106 r = manager_connect_console(m);
1110 /* Connect to udev */
1111 r = manager_connect_udev(m);
1113 return log_error_errno(r, "Failed to create udev watchers: %m");
1115 /* Connect to the bus */
1116 r = manager_connect_bus(m);
1120 /* Instantiate magic seat 0 */
1121 r = manager_add_seat(m, "seat0", &m->seat0);
1123 return log_error_errno(r, "Failed to add seat0: %m");
1125 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1127 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1129 /* Deserialize state */
1130 r = manager_enumerate_devices(m);
1132 log_warning_errno(r, "Device enumeration failed: %m");
1134 r = manager_enumerate_seats(m);
1136 log_warning_errno(r, "Seat enumeration failed: %m");
1138 r = manager_enumerate_users(m);
1140 log_warning_errno(r, "User enumeration failed: %m");
1142 r = manager_enumerate_sessions(m);
1144 log_warning_errno(r, "Session enumeration failed: %m");
1146 r = manager_enumerate_inhibitors(m);
1148 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1150 r = manager_enumerate_buttons(m);
1152 log_warning_errno(r, "Button enumeration failed: %m");
1154 /* Remove stale objects before we start them */
1155 manager_gc(m, false);
1157 /* Reserve the special reserved VT */
1158 /// elogind does not support autospawning of vts
1160 manager_reserve_vt(m);
1163 /* And start everything */
1164 HASHMAP_FOREACH(seat, m->seats, i)
1167 HASHMAP_FOREACH(user, m->users, i)
1170 HASHMAP_FOREACH(session, m->sessions, i)
1171 session_start(session);
1173 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1174 inhibitor_start(inhibitor);
1176 HASHMAP_FOREACH(button, m->buttons, i)
1177 button_check_switches(button);
1179 manager_dispatch_idle_action(NULL, 0, m);
1184 static int manager_run(Manager *m) {
1190 r = sd_event_get_state(m->event);
1193 if (r == SD_EVENT_FINISHED)
1196 manager_gc(m, true);
1198 r = manager_dispatch_delayed(m, false);
1204 r = sd_event_run(m->event, (uint64_t) -1);
1210 static int manager_parse_config_file(Manager *m) {
1211 /// elogind parses its own config file
1216 return config_parse_many(PKGSYSCONFDIR "/logind.conf",
1217 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1219 config_item_perf_lookup, logind_gperf_lookup,
1222 const char *unit = NULL, *logind_conf, *sections;
1224 bool relaxed = false, allow_include = false, warn = true;
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);
1239 int main(int argc, char *argv[]) {
1243 elogind_set_program_name(argv[0]);
1244 log_set_target(LOG_TARGET_AUTO);
1245 log_set_facility(LOG_AUTH);
1246 log_parse_environment();
1249 #ifdef ENABLE_DEBUG_ELOGIND
1250 log_set_max_level(LOG_DEBUG);
1251 #endif // ENABLE_DEBUG_ELOGIND
1256 log_error("This program takes no arguments.");
1261 /* Always create the directories people can create inotify
1262 * watches in. Note that some applications might check for the
1263 * existence of /run/systemd/seats/ to determine whether
1264 * logind is available, so please always make sure this check
1266 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1268 mkdir_label("/run/systemd/seats", 0755);
1269 mkdir_label("/run/systemd/users", 0755);
1270 mkdir_label("/run/systemd/sessions", 0755);
1272 r = mkdir_label("/run/systemd", 0755);
1273 if ( (r < 0) && (-EEXIST != r) )
1274 return log_error_errno(r, "Failed to create /run/systemd : %m");
1275 r = mkdir_label("/run/systemd/seats", 0755);
1276 if ( r < 0 && (-EEXIST != r) )
1277 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1278 r = mkdir_label("/run/systemd/users", 0755);
1279 if ( r < 0 && (-EEXIST != r) )
1280 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1281 r = mkdir_label("/run/systemd/sessions", 0755);
1282 if ( r < 0 && (-EEXIST != r) )
1283 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1284 r = mkdir_label("/run/systemd/machines", 0755);
1285 if ( r < 0 && (-EEXIST != r) )
1286 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1295 manager_parse_config_file(m);
1297 r = manager_startup(m);
1299 log_error_errno(r, "Failed to fully start up daemon: %m");
1303 log_debug("elogind running as pid "PID_FMT, getpid());
1307 "STATUS=Processing requests...");
1311 log_debug("elogind stopped as pid "PID_FMT, getpid());
1316 "STATUS=Shutting down...");
1320 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;