2 This file is part of systemd.
4 Copyright 2011 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #if 0 /// elogind needs the systems udev header
30 #include "sd-daemon.h"
32 #include "alloc-util.h"
33 #include "bus-error.h"
35 #include "conf-parser.h"
37 #include "dirent-util.h"
39 #include "format-util.h"
41 #include "selinux-util.h"
42 #include "signal-util.h"
44 #include "udev-util.h"
45 /// Additional includes needed by elogind
46 #include "cgroup.h" // From src/core/
49 #include "musl_missing.h"
51 static void manager_free(Manager *m);
53 static void manager_reset_config(Manager *m) {
54 #if 0 /// elogind does not support autospawning of vts
59 m->inhibit_delay_max = 5 * USEC_PER_SEC;
60 m->handle_power_key = HANDLE_POWEROFF;
61 m->handle_suspend_key = HANDLE_SUSPEND;
62 m->handle_hibernate_key = HANDLE_HIBERNATE;
63 m->handle_lid_switch = HANDLE_SUSPEND;
64 m->handle_lid_switch_docked = HANDLE_IGNORE;
65 m->power_key_ignore_inhibited = false;
66 m->suspend_key_ignore_inhibited = false;
67 m->hibernate_key_ignore_inhibited = false;
68 m->lid_switch_ignore_inhibited = true;
70 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
72 m->idle_action_usec = 30 * USEC_PER_MINUTE;
73 m->idle_action = HANDLE_IGNORE;
75 m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */
76 m->user_tasks_max = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); /* 33% */
77 m->sessions_max = 8192;
78 m->inhibitors_max = 8192;
80 m->kill_user_processes = KILL_USER_PROCESSES;
82 m->kill_only_users = strv_free(m->kill_only_users);
83 m->kill_exclude_users = strv_free(m->kill_exclude_users);
86 static Manager *manager_new(void) {
94 m->console_active_fd = -1;
95 #if 0 /// UNNEEDED by elogind
96 m->reserve_vt_fd = -1;
99 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
101 m->devices = hashmap_new(&string_hash_ops);
102 m->seats = hashmap_new(&string_hash_ops);
103 m->sessions = hashmap_new(&string_hash_ops);
104 m->users = hashmap_new(NULL);
105 m->inhibitors = hashmap_new(&string_hash_ops);
106 m->buttons = hashmap_new(&string_hash_ops);
108 m->user_units = hashmap_new(&string_hash_ops);
109 m->session_units = hashmap_new(&string_hash_ops);
111 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
114 #if 1 /// elogind needs some more data
115 r = elogind_manager_new(m);
119 m->udev = udev_new();
123 r = sd_event_default(&m->event);
127 sd_event_set_watchdog(m->event, true);
129 manager_reset_config(m);
138 static void manager_free(Manager *m) {
149 while ((session = hashmap_first(m->sessions)))
150 session_free(session);
152 while ((u = hashmap_first(m->users)))
155 while ((d = hashmap_first(m->devices)))
158 while ((s = hashmap_first(m->seats)))
161 while ((i = hashmap_first(m->inhibitors)))
164 while ((b = hashmap_first(m->buttons)))
167 hashmap_free(m->devices);
168 hashmap_free(m->seats);
169 hashmap_free(m->sessions);
170 hashmap_free(m->users);
171 hashmap_free(m->inhibitors);
172 hashmap_free(m->buttons);
174 hashmap_free(m->user_units);
175 hashmap_free(m->session_units);
177 sd_event_source_unref(m->idle_action_event_source);
178 sd_event_source_unref(m->inhibit_timeout_source);
179 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
180 sd_event_source_unref(m->nologin_timeout_source);
181 sd_event_source_unref(m->wall_message_timeout_source);
183 sd_event_source_unref(m->console_active_event_source);
184 sd_event_source_unref(m->udev_seat_event_source);
185 sd_event_source_unref(m->udev_device_event_source);
186 sd_event_source_unref(m->udev_vcsa_event_source);
187 sd_event_source_unref(m->udev_button_event_source);
188 sd_event_source_unref(m->lid_switch_ignore_event_source);
190 safe_close(m->console_active_fd);
192 udev_monitor_unref(m->udev_seat_monitor);
193 udev_monitor_unref(m->udev_device_monitor);
194 udev_monitor_unref(m->udev_vcsa_monitor);
195 udev_monitor_unref(m->udev_button_monitor);
199 if (m->unlink_nologin)
200 (void) unlink("/run/nologin");
202 bus_verify_polkit_async_registry_free(m->polkit_registry);
204 sd_bus_unref(m->bus);
205 sd_event_unref(m->event);
207 #if 0 /// elogind does not support autospawning of vts
208 safe_close(m->reserve_vt_fd);
210 #if 1 /// elogind has to free its own data
211 elogind_manager_free(m);
214 strv_free(m->kill_only_users);
215 strv_free(m->kill_exclude_users);
217 free(m->scheduled_shutdown_type);
218 free(m->scheduled_shutdown_tty);
219 free(m->wall_message);
220 #if 0 /// UNNEEDED by elogind
226 static int manager_enumerate_devices(Manager *m) {
227 struct udev_list_entry *item = NULL, *first = NULL;
228 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
233 /* Loads devices from udev and creates seats for them as
236 e = udev_enumerate_new(m->udev);
240 r = udev_enumerate_add_match_tag(e, "master-of-seat");
244 r = udev_enumerate_add_match_is_initialized(e);
248 r = udev_enumerate_scan_devices(e);
252 first = udev_enumerate_get_list_entry(e);
253 udev_list_entry_foreach(item, first) {
254 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
257 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
261 k = manager_process_seat_device(m, d);
269 static int manager_enumerate_buttons(Manager *m) {
270 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
271 struct udev_list_entry *item = NULL, *first = NULL;
276 /* Loads buttons from udev */
278 if (m->handle_power_key == HANDLE_IGNORE &&
279 m->handle_suspend_key == HANDLE_IGNORE &&
280 m->handle_hibernate_key == HANDLE_IGNORE &&
281 m->handle_lid_switch == HANDLE_IGNORE &&
282 m->handle_lid_switch_docked == HANDLE_IGNORE)
285 e = udev_enumerate_new(m->udev);
289 r = udev_enumerate_add_match_subsystem(e, "input");
293 r = udev_enumerate_add_match_tag(e, "power-switch");
297 r = udev_enumerate_add_match_is_initialized(e);
301 r = udev_enumerate_scan_devices(e);
305 first = udev_enumerate_get_list_entry(e);
306 udev_list_entry_foreach(item, first) {
307 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
310 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
314 k = manager_process_button_device(m, d);
322 static int manager_enumerate_seats(Manager *m) {
323 _cleanup_closedir_ DIR *d = NULL;
329 /* This loads data about seats stored on disk, but does not
330 * actually create any seats. Removes data of seats that no
333 d = opendir("/run/systemd/seats");
338 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
341 FOREACH_DIRENT(de, d, return -errno) {
345 if (!dirent_is_file(de))
348 s = hashmap_get(m->seats, de->d_name);
350 unlinkat(dirfd(d), de->d_name, 0);
362 static int manager_enumerate_linger_users(Manager *m) {
363 _cleanup_closedir_ DIR *d = NULL;
369 d = opendir("/var/lib/systemd/linger");
374 return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
377 FOREACH_DIRENT(de, d, return -errno) {
380 if (!dirent_is_file(de))
383 k = manager_add_user_by_name(m, de->d_name, NULL);
385 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
393 static int manager_enumerate_users(Manager *m) {
394 _cleanup_closedir_ DIR *d = NULL;
400 /* Add lingering users */
401 r = manager_enumerate_linger_users(m);
403 /* Read in user data stored on disk */
404 d = opendir("/run/systemd/users");
409 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
412 FOREACH_DIRENT(de, d, return -errno) {
415 if (!dirent_is_file(de))
418 k = manager_add_user_by_name(m, de->d_name, &u);
420 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
426 user_add_to_gc_queue(u);
436 static int manager_attach_fds(Manager *m) {
437 _cleanup_strv_free_ char **fdnames = NULL;
440 /* Upon restart, PID1 will send us back all fds of session devices
441 * that we previously opened. Each file descriptor is associated
442 * with a given session. The session ids are passed through FDNAMES. */
444 n = sd_listen_fds_with_names(true, &fdnames);
448 for (i = 0; i < n; i++) {
454 fd = SD_LISTEN_FDS_START + i;
456 id = startswith(fdnames[i], "session-");
460 s = hashmap_get(m->sessions, id);
462 /* If the session doesn't exist anymore, the associated session
463 * device attached to this fd doesn't either. Let's simply close
465 log_debug("Failed to attach fd for unknown session: %s", id);
470 if (fstat(fd, &st) < 0) {
471 /* The device is allowed to go away at a random point, in which
472 * case fstat failing is expected. */
473 log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id);
478 sd = hashmap_get(s->devices, &st.st_rdev);
480 /* Weird we got an fd for a session device which wasn't
481 * recorded in the session state file... */
482 log_warning("Got fd for missing session device [%u:%u] in session %s",
483 major(st.st_rdev), minor(st.st_rdev), s->id);
488 log_debug("Attaching fd to session device [%u:%u] for session %s",
489 major(st.st_rdev), minor(st.st_rdev), s->id);
491 session_device_attach_fd(sd, fd, s->was_active);
497 static int manager_enumerate_sessions(Manager *m) {
498 _cleanup_closedir_ DIR *d = NULL;
504 /* Read in session data stored on disk */
505 d = opendir("/run/systemd/sessions");
510 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
513 FOREACH_DIRENT(de, d, return -errno) {
516 if (!dirent_is_file(de))
519 if (!session_id_valid(de->d_name)) {
520 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
525 k = manager_add_session(m, de->d_name, &s);
527 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
532 session_add_to_gc_queue(s);
539 /* We might be restarted and PID1 could have sent us back the
540 * session device fds we previously saved. */
541 k = manager_attach_fds(m);
543 log_warning_errno(k, "Failed to reattach session device fds: %m");
548 static int manager_enumerate_inhibitors(Manager *m) {
549 _cleanup_closedir_ DIR *d = NULL;
555 d = opendir("/run/systemd/inhibit");
560 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
563 FOREACH_DIRENT(de, d, return -errno) {
567 if (!dirent_is_file(de))
570 k = manager_add_inhibitor(m, de->d_name, &i);
572 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
577 k = inhibitor_load(i);
585 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
586 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
587 Manager *m = userdata;
591 d = udev_monitor_receive_device(m->udev_seat_monitor);
595 manager_process_seat_device(m, d);
599 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
600 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
601 Manager *m = userdata;
605 d = udev_monitor_receive_device(m->udev_device_monitor);
609 manager_process_seat_device(m, d);
613 #if 0 /// UNNEEDED by elogind
614 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
615 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
616 Manager *m = userdata;
621 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
625 name = udev_device_get_sysname(d);
627 /* Whenever a VCSA device is removed try to reallocate our
628 * VTs, to make sure our auto VTs never go away. */
630 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
631 seat_preallocate_vts(m->seat0);
637 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
638 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
639 Manager *m = userdata;
643 d = udev_monitor_receive_device(m->udev_button_monitor);
647 manager_process_button_device(m, d);
651 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
652 Manager *m = userdata;
656 assert(m->console_active_fd == fd);
658 seat_read_active_vt(m->seat0);
662 #if 0 /// UNNEEDED by elogind
663 static int manager_reserve_vt(Manager *m) {
664 _cleanup_free_ char *p = NULL;
668 if (m->reserve_vt <= 0)
671 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
674 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
675 if (m->reserve_vt_fd < 0) {
677 /* Don't complain on VT-less systems */
679 log_warning_errno(errno, "Failed to pin reserved VT: %m");
687 static int manager_connect_bus(Manager *m) {
688 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
694 r = sd_bus_default_system(&m->bus);
696 return log_error_errno(r, "Failed to connect to system bus: %m");
698 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
700 return log_error_errno(r, "Failed to add manager object vtable: %m");
702 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
704 return log_error_errno(r, "Failed to add seat object vtable: %m");
706 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
708 return log_error_errno(r, "Failed to add seat enumerator: %m");
710 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
712 return log_error_errno(r, "Failed to add session object vtable: %m");
714 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
716 return log_error_errno(r, "Failed to add session enumerator: %m");
718 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
720 return log_error_errno(r, "Failed to add user object vtable: %m");
722 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
724 return log_error_errno(r, "Failed to add user enumerator: %m");
726 #if 0 /// elogind does not support systemd as PID 1
727 r = sd_bus_add_match(m->bus,
730 "sender='org.freedesktop.systemd1',"
731 "interface='org.freedesktop.systemd1.Manager',"
732 "member='JobRemoved',"
733 "path='/org/freedesktop/systemd1'",
734 match_job_removed, m);
736 return log_error_errno(r, "Failed to add match for JobRemoved: %m");
738 r = sd_bus_add_match(m->bus,
741 "sender='org.freedesktop.systemd1',"
742 "interface='org.freedesktop.systemd1.Manager',"
743 "member='UnitRemoved',"
744 "path='/org/freedesktop/systemd1'",
745 match_unit_removed, m);
747 return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
749 r = sd_bus_add_match(m->bus,
752 "sender='org.freedesktop.systemd1',"
753 "interface='org.freedesktop.DBus.Properties',"
754 "member='PropertiesChanged'",
755 match_properties_changed, m);
757 return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
759 r = sd_bus_add_match(m->bus,
762 "sender='org.freedesktop.systemd1',"
763 "interface='org.freedesktop.systemd1.Manager',"
764 "member='Reloading',"
765 "path='/org/freedesktop/systemd1'",
768 return log_error_errno(r, "Failed to add match for Reloading: %m");
770 r = sd_bus_call_method(
772 "org.freedesktop.systemd1",
773 "/org/freedesktop/systemd1",
774 "org.freedesktop.systemd1.Manager",
779 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
784 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
786 return log_error_errno(r, "Failed to register name: %m");
788 r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
790 return log_error_errno(r, "Failed to attach bus to event loop: %m");
792 #if 0 /// elogind has to setup its release agent
795 r = elogind_setup_cgroups_agent(m);
801 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
803 Session *active, *iter;
806 * We got a VT-switch signal and we have to acknowledge it immediately.
807 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
808 * old user-space might run multiple sessions on a single VT, *sigh*.
809 * Therefore, we have to iterate all sessions and find one with a vtfd
810 * on the requested VT.
811 * As only VTs with active controllers have VT_PROCESS set, our current
812 * notion of the active VT might be wrong (for instance if the switch
813 * happens while we setup VT_PROCESS). Therefore, read the current VT
814 * first and then use s->active->vtnr as reference. Note that this is
815 * not racy, as no further VT-switch can happen as long as we're in
816 * synchronous VT_PROCESS mode.
820 seat_read_active_vt(m->seat0);
822 active = m->seat0->active;
823 if (!active || active->vtnr < 1) {
824 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
828 if (active->vtfd >= 0) {
829 session_leave_vt(active);
831 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
832 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
833 session_leave_vt(iter);
842 static int manager_connect_console(Manager *m) {
846 assert(m->console_active_fd < 0);
848 /* On certain architectures (S390 and Xen, and containers),
849 /dev/tty0 does not exist, so don't fail if we can't open
851 if (access("/dev/tty0", F_OK) < 0)
854 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
855 if (m->console_active_fd < 0) {
857 /* On some systems the device node /dev/tty0 may exist
858 * even though /sys/class/tty/tty0 does not. */
862 return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
865 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
867 log_error("Failed to watch foreground console");
872 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
873 * as VT-acquire signal. We ignore any acquire-events (yes, we still
874 * have to provide a valid signal-number for it!) and acknowledge all
875 * release events immediately.
878 if (SIGRTMIN + 1 > SIGRTMAX) {
879 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
883 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
884 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
886 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
893 static int manager_connect_udev(Manager *m) {
897 assert(!m->udev_seat_monitor);
898 assert(!m->udev_device_monitor);
899 assert(!m->udev_vcsa_monitor);
900 assert(!m->udev_button_monitor);
902 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
903 if (!m->udev_seat_monitor)
906 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
910 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
914 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);
918 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
919 if (!m->udev_device_monitor)
922 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
926 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
930 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
934 r = udev_monitor_enable_receiving(m->udev_device_monitor);
938 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);
942 /* Don't watch keys if nobody cares */
943 if (m->handle_power_key != HANDLE_IGNORE ||
944 m->handle_suspend_key != HANDLE_IGNORE ||
945 m->handle_hibernate_key != HANDLE_IGNORE ||
946 m->handle_lid_switch != HANDLE_IGNORE ||
947 m->handle_lid_switch_docked != HANDLE_IGNORE) {
949 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
950 if (!m->udev_button_monitor)
953 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
957 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
961 r = udev_monitor_enable_receiving(m->udev_button_monitor);
965 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);
970 /* Don't bother watching VCSA devices, if nobody cares */
971 #if 0 /// elogind does not support autospawning of vts
972 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
974 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
975 if (!m->udev_vcsa_monitor)
978 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
982 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
986 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);
995 static void manager_gc(Manager *m, bool drop_not_started) {
1002 while ((seat = m->seat_gc_queue)) {
1003 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
1004 seat->in_gc_queue = false;
1006 if (!seat_check_gc(seat, drop_not_started)) {
1007 seat_stop(seat, false);
1012 while ((session = m->session_gc_queue)) {
1013 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1014 session->in_gc_queue = false;
1016 /* First, if we are not closing yet, initiate stopping */
1017 if (!session_check_gc(session, drop_not_started) &&
1018 session_get_state(session) != SESSION_CLOSING)
1019 session_stop(session, false);
1021 /* Normally, this should make the session referenced
1022 * again, if it doesn't then let's get rid of it
1024 if (!session_check_gc(session, drop_not_started)) {
1025 session_finalize(session);
1026 session_free(session);
1030 while ((user = m->user_gc_queue)) {
1031 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1032 user->in_gc_queue = false;
1034 /* First step: queue stop jobs */
1035 if (!user_check_gc(user, drop_not_started))
1036 user_stop(user, false);
1038 /* Second step: finalize user */
1039 if (!user_check_gc(user, drop_not_started)) {
1040 user_finalize(user);
1046 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1047 Manager *m = userdata;
1048 struct dual_timestamp since;
1054 if (m->idle_action == HANDLE_IGNORE ||
1055 m->idle_action_usec <= 0)
1058 n = now(CLOCK_MONOTONIC);
1060 r = manager_get_idle_hint(m, &since);
1062 /* Not idle. Let's check if after a timeout it might be idle then. */
1063 elapse = n + m->idle_action_usec;
1065 /* Idle! Let's see if it's time to do something, or if
1066 * we shall sleep for longer. */
1068 if (n >= since.monotonic + m->idle_action_usec &&
1069 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1070 log_info("System idle. Taking action.");
1072 manager_handle_action(m, 0, m->idle_action, false, false);
1073 m->idle_action_not_before_usec = n;
1076 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1079 if (!m->idle_action_event_source) {
1081 r = sd_event_add_time(
1083 &m->idle_action_event_source,
1085 elapse, USEC_PER_SEC*30,
1086 manager_dispatch_idle_action, m);
1088 return log_error_errno(r, "Failed to add idle event source: %m");
1090 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1092 return log_error_errno(r, "Failed to set idle event source priority: %m");
1094 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1096 return log_error_errno(r, "Failed to set idle event timer: %m");
1098 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1100 return log_error_errno(r, "Failed to enable idle event timer: %m");
1106 static int manager_parse_config_file(Manager *m) {
1107 #if 0 /// elogind parses its own config file
1110 return config_parse_many_nulstr(PKGSYSCONFDIR "/logind.conf",
1111 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1113 config_item_perf_lookup, logind_gperf_lookup,
1116 const char* logind_conf = getenv("ELOGIND_CONF_FILE");
1121 logind_conf = PKGSYSCONFDIR "/logind.conf";
1123 return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0",
1124 config_item_perf_lookup, logind_gperf_lookup,
1125 false, false, true, m);
1129 static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1130 Manager *m = userdata;
1133 manager_reset_config(m);
1134 r = manager_parse_config_file(m);
1136 log_warning_errno(r, "Failed to parse config file, using defaults: %m");
1138 log_info("Config file reloaded.");
1140 #if 1 /// elogind needs an Add-On for sleep configuration
1141 elogind_manager_reset_config(m);
1147 static int manager_startup(Manager *m) {
1153 Inhibitor *inhibitor;
1158 assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0);
1160 r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m);
1162 return log_error_errno(r, "Failed to register SIGHUP handler: %m");
1164 #if 1 /// elogind needs some extra preparations before connecting...
1165 elogind_manager_startup(m);
1168 /* Connect to console */
1169 r = manager_connect_console(m);
1173 /* Connect to udev */
1174 r = manager_connect_udev(m);
1176 return log_error_errno(r, "Failed to create udev watchers: %m");
1178 /* Connect to the bus */
1179 r = manager_connect_bus(m);
1183 /* Instantiate magic seat 0 */
1184 r = manager_add_seat(m, "seat0", &m->seat0);
1186 return log_error_errno(r, "Failed to add seat0: %m");
1188 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1190 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1192 /* Deserialize state */
1193 r = manager_enumerate_devices(m);
1195 log_warning_errno(r, "Device enumeration failed: %m");
1197 r = manager_enumerate_seats(m);
1199 log_warning_errno(r, "Seat enumeration failed: %m");
1201 r = manager_enumerate_users(m);
1203 log_warning_errno(r, "User enumeration failed: %m");
1205 r = manager_enumerate_sessions(m);
1207 log_warning_errno(r, "Session enumeration failed: %m");
1209 r = manager_enumerate_inhibitors(m);
1211 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1213 r = manager_enumerate_buttons(m);
1215 log_warning_errno(r, "Button enumeration failed: %m");
1217 /* Remove stale objects before we start them */
1218 manager_gc(m, false);
1220 /* Reserve the special reserved VT */
1221 #if 0 /// elogind does not support autospawning of vts
1222 manager_reserve_vt(m);
1225 /* And start everything */
1226 HASHMAP_FOREACH(seat, m->seats, i)
1229 HASHMAP_FOREACH(user, m->users, i)
1232 HASHMAP_FOREACH(session, m->sessions, i)
1233 session_start(session);
1235 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1236 inhibitor_start(inhibitor);
1238 HASHMAP_FOREACH(button, m->buttons, i)
1239 button_check_switches(button);
1241 manager_dispatch_idle_action(NULL, 0, m);
1246 static int manager_run(Manager *m) {
1252 r = sd_event_get_state(m->event);
1255 if (r == SD_EVENT_FINISHED)
1258 manager_gc(m, true);
1260 r = manager_dispatch_delayed(m, false);
1266 r = sd_event_run(m->event, (uint64_t) -1);
1272 int main(int argc, char *argv[]) {
1276 #if 1 /// perform extra checks for elogind startup
1277 r = elogind_startup(argc, argv);
1279 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1282 elogind_set_program_name(argv[0]);
1283 log_set_target(LOG_TARGET_AUTO);
1284 log_set_facility(LOG_AUTH);
1285 log_parse_environment();
1286 #ifdef ENABLE_DEBUG_ELOGIND
1287 log_set_max_level(LOG_DEBUG);
1288 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1289 #endif // ENABLE_DEBUG_ELOGIND
1294 #if 0 /// elogind has some extra functionality at startup, argc can be != 1
1296 log_error("This program takes no arguments.");
1302 r = mac_selinux_init();
1304 log_error_errno(r, "Could not initialize labelling: %m");
1308 /* Always create the directories people can create inotify
1309 * watches in. Note that some applications might check for the
1310 * existence of /run/systemd/seats/ to determine whether
1311 * logind is available, so please always make sure this check
1313 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1314 mkdir_label("/run/systemd/seats", 0755);
1315 mkdir_label("/run/systemd/users", 0755);
1316 mkdir_label("/run/systemd/sessions", 0755);
1318 r = mkdir_label("/run/systemd", 0755);
1319 if ( (r < 0) && (-EEXIST != r) )
1320 return log_error_errno(r, "Failed to create /run/systemd : %m");
1321 r = mkdir_label("/run/systemd/seats", 0755);
1322 if ( r < 0 && (-EEXIST != r) )
1323 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1324 r = mkdir_label("/run/systemd/users", 0755);
1325 if ( r < 0 && (-EEXIST != r) )
1326 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1327 r = mkdir_label("/run/systemd/sessions", 0755);
1328 if ( r < 0 && (-EEXIST != r) )
1329 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1330 r = mkdir_label("/run/systemd/machines", 0755);
1331 if ( r < 0 && (-EEXIST != r) )
1332 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1341 manager_parse_config_file(m);
1343 #if 1 /// elogind needs an Add-On for sleep configuration
1344 elogind_manager_reset_config(m);
1347 r = manager_startup(m);
1349 log_error_errno(r, "Failed to fully start up daemon: %m");
1353 log_debug("elogind running as pid "PID_FMT, getpid());
1357 "STATUS=Processing requests...");
1361 log_debug("elogind stopped as pid "PID_FMT, getpid());
1366 "STATUS=Shutting down...");
1370 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;