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"
50 #include "process-util.h"
52 static void manager_free(Manager *m);
54 static void manager_reset_config(Manager *m) {
55 #if 0 /// elogind does not support autospawning of vts
60 m->inhibit_delay_max = 5 * USEC_PER_SEC;
61 m->handle_power_key = HANDLE_POWEROFF;
62 m->handle_suspend_key = HANDLE_SUSPEND;
63 m->handle_hibernate_key = HANDLE_HIBERNATE;
64 m->handle_lid_switch = HANDLE_SUSPEND;
65 m->handle_lid_switch_docked = HANDLE_IGNORE;
66 m->power_key_ignore_inhibited = false;
67 m->suspend_key_ignore_inhibited = false;
68 m->hibernate_key_ignore_inhibited = false;
69 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;
76 m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */
77 m->user_tasks_max = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); /* 33% */
78 m->sessions_max = 8192;
79 m->inhibitors_max = 8192;
81 m->kill_user_processes = KILL_USER_PROCESSES;
83 m->kill_only_users = strv_free(m->kill_only_users);
84 m->kill_exclude_users = strv_free(m->kill_exclude_users);
87 static Manager *manager_new(void) {
95 m->console_active_fd = -1;
96 #if 0 /// UNNEEDED by elogind
97 m->reserve_vt_fd = -1;
100 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
102 m->devices = hashmap_new(&string_hash_ops);
103 m->seats = hashmap_new(&string_hash_ops);
104 m->sessions = hashmap_new(&string_hash_ops);
105 m->users = hashmap_new(NULL);
106 m->inhibitors = hashmap_new(&string_hash_ops);
107 m->buttons = hashmap_new(&string_hash_ops);
109 m->user_units = hashmap_new(&string_hash_ops);
110 m->session_units = hashmap_new(&string_hash_ops);
112 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
115 #if 1 /// elogind needs some more data
116 r = elogind_manager_new(m);
120 m->udev = udev_new();
124 r = sd_event_default(&m->event);
128 sd_event_set_watchdog(m->event, true);
130 manager_reset_config(m);
139 static void manager_free(Manager *m) {
150 while ((session = hashmap_first(m->sessions)))
151 session_free(session);
153 while ((u = hashmap_first(m->users)))
156 while ((d = hashmap_first(m->devices)))
159 while ((s = hashmap_first(m->seats)))
162 while ((i = hashmap_first(m->inhibitors)))
165 while ((b = hashmap_first(m->buttons)))
168 hashmap_free(m->devices);
169 hashmap_free(m->seats);
170 hashmap_free(m->sessions);
171 hashmap_free(m->users);
172 hashmap_free(m->inhibitors);
173 hashmap_free(m->buttons);
175 hashmap_free(m->user_units);
176 hashmap_free(m->session_units);
178 sd_event_source_unref(m->idle_action_event_source);
179 sd_event_source_unref(m->inhibit_timeout_source);
180 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
181 sd_event_source_unref(m->nologin_timeout_source);
182 sd_event_source_unref(m->wall_message_timeout_source);
184 sd_event_source_unref(m->console_active_event_source);
185 sd_event_source_unref(m->udev_seat_event_source);
186 sd_event_source_unref(m->udev_device_event_source);
187 sd_event_source_unref(m->udev_vcsa_event_source);
188 sd_event_source_unref(m->udev_button_event_source);
189 sd_event_source_unref(m->lid_switch_ignore_event_source);
191 safe_close(m->console_active_fd);
193 udev_monitor_unref(m->udev_seat_monitor);
194 udev_monitor_unref(m->udev_device_monitor);
195 udev_monitor_unref(m->udev_vcsa_monitor);
196 udev_monitor_unref(m->udev_button_monitor);
200 if (m->unlink_nologin)
201 (void) unlink("/run/nologin");
203 bus_verify_polkit_async_registry_free(m->polkit_registry);
205 sd_bus_unref(m->bus);
206 sd_event_unref(m->event);
208 #if 0 /// elogind does not support autospawning of vts
209 safe_close(m->reserve_vt_fd);
211 #if 1 /// elogind has to free its own data
212 elogind_manager_free(m);
215 strv_free(m->kill_only_users);
216 strv_free(m->kill_exclude_users);
218 free(m->scheduled_shutdown_type);
219 free(m->scheduled_shutdown_tty);
220 free(m->wall_message);
221 #if 0 /// UNNEEDED by elogind
227 static int manager_enumerate_devices(Manager *m) {
228 struct udev_list_entry *item = NULL, *first = NULL;
229 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
234 /* Loads devices from udev and creates seats for them as
237 e = udev_enumerate_new(m->udev);
241 r = udev_enumerate_add_match_tag(e, "master-of-seat");
245 r = udev_enumerate_add_match_is_initialized(e);
249 r = udev_enumerate_scan_devices(e);
253 first = udev_enumerate_get_list_entry(e);
254 udev_list_entry_foreach(item, first) {
255 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
258 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
262 k = manager_process_seat_device(m, d);
270 static int manager_enumerate_buttons(Manager *m) {
271 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
272 struct udev_list_entry *item = NULL, *first = NULL;
277 /* Loads buttons from udev */
279 if (m->handle_power_key == HANDLE_IGNORE &&
280 m->handle_suspend_key == HANDLE_IGNORE &&
281 m->handle_hibernate_key == HANDLE_IGNORE &&
282 m->handle_lid_switch == HANDLE_IGNORE &&
283 m->handle_lid_switch_docked == HANDLE_IGNORE)
286 e = udev_enumerate_new(m->udev);
290 r = udev_enumerate_add_match_subsystem(e, "input");
294 r = udev_enumerate_add_match_tag(e, "power-switch");
298 r = udev_enumerate_add_match_is_initialized(e);
302 r = udev_enumerate_scan_devices(e);
306 first = udev_enumerate_get_list_entry(e);
307 udev_list_entry_foreach(item, first) {
308 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
311 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
315 k = manager_process_button_device(m, d);
323 static int manager_enumerate_seats(Manager *m) {
324 _cleanup_closedir_ DIR *d = NULL;
330 /* This loads data about seats stored on disk, but does not
331 * actually create any seats. Removes data of seats that no
334 d = opendir("/run/systemd/seats");
339 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
342 FOREACH_DIRENT(de, d, return -errno) {
346 if (!dirent_is_file(de))
349 s = hashmap_get(m->seats, de->d_name);
351 unlinkat(dirfd(d), de->d_name, 0);
363 static int manager_enumerate_linger_users(Manager *m) {
364 _cleanup_closedir_ DIR *d = NULL;
370 d = opendir("/var/lib/systemd/linger");
375 return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
378 FOREACH_DIRENT(de, d, return -errno) {
381 if (!dirent_is_file(de))
384 k = manager_add_user_by_name(m, de->d_name, NULL);
386 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
394 static int manager_enumerate_users(Manager *m) {
395 _cleanup_closedir_ DIR *d = NULL;
401 /* Add lingering users */
402 r = manager_enumerate_linger_users(m);
404 /* Read in user data stored on disk */
405 d = opendir("/run/systemd/users");
410 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
413 FOREACH_DIRENT(de, d, return -errno) {
416 if (!dirent_is_file(de))
419 k = manager_add_user_by_name(m, de->d_name, &u);
421 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
427 user_add_to_gc_queue(u);
437 static int manager_attach_fds(Manager *m) {
438 _cleanup_strv_free_ char **fdnames = NULL;
441 /* Upon restart, PID1 will send us back all fds of session devices
442 * that we previously opened. Each file descriptor is associated
443 * with a given session. The session ids are passed through FDNAMES. */
445 n = sd_listen_fds_with_names(true, &fdnames);
449 for (i = 0; i < n; i++) {
455 fd = SD_LISTEN_FDS_START + i;
457 id = startswith(fdnames[i], "session-");
461 s = hashmap_get(m->sessions, id);
463 /* If the session doesn't exist anymore, the associated session
464 * device attached to this fd doesn't either. Let's simply close
466 log_debug("Failed to attach fd for unknown session: %s", id);
471 if (fstat(fd, &st) < 0) {
472 /* The device is allowed to go away at a random point, in which
473 * case fstat failing is expected. */
474 log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id);
479 sd = hashmap_get(s->devices, &st.st_rdev);
481 /* Weird we got an fd for a session device which wasn't
482 * recorded in the session state file... */
483 log_warning("Got fd for missing session device [%u:%u] in session %s",
484 major(st.st_rdev), minor(st.st_rdev), s->id);
489 log_debug("Attaching fd to session device [%u:%u] for session %s",
490 major(st.st_rdev), minor(st.st_rdev), s->id);
492 session_device_attach_fd(sd, fd, s->was_active);
498 static int manager_enumerate_sessions(Manager *m) {
499 _cleanup_closedir_ DIR *d = NULL;
505 /* Read in session data stored on disk */
506 d = opendir("/run/systemd/sessions");
511 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
514 FOREACH_DIRENT(de, d, return -errno) {
517 if (!dirent_is_file(de))
520 if (!session_id_valid(de->d_name)) {
521 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
526 k = manager_add_session(m, de->d_name, &s);
528 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
533 session_add_to_gc_queue(s);
540 /* We might be restarted and PID1 could have sent us back the
541 * session device fds we previously saved. */
542 k = manager_attach_fds(m);
544 log_warning_errno(k, "Failed to reattach session device fds: %m");
549 static int manager_enumerate_inhibitors(Manager *m) {
550 _cleanup_closedir_ DIR *d = NULL;
556 d = opendir("/run/systemd/inhibit");
561 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
564 FOREACH_DIRENT(de, d, return -errno) {
568 if (!dirent_is_file(de))
571 k = manager_add_inhibitor(m, de->d_name, &i);
573 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
578 k = inhibitor_load(i);
586 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
587 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
588 Manager *m = userdata;
592 d = udev_monitor_receive_device(m->udev_seat_monitor);
596 manager_process_seat_device(m, d);
600 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
601 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
602 Manager *m = userdata;
606 d = udev_monitor_receive_device(m->udev_device_monitor);
610 manager_process_seat_device(m, d);
614 #if 0 /// UNNEEDED by elogind
615 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
616 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
617 Manager *m = userdata;
622 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
626 name = udev_device_get_sysname(d);
628 /* Whenever a VCSA device is removed try to reallocate our
629 * VTs, to make sure our auto VTs never go away. */
631 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
632 seat_preallocate_vts(m->seat0);
638 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
639 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
640 Manager *m = userdata;
644 d = udev_monitor_receive_device(m->udev_button_monitor);
648 manager_process_button_device(m, d);
652 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
653 Manager *m = userdata;
657 assert(m->console_active_fd == fd);
659 seat_read_active_vt(m->seat0);
663 #if 0 /// UNNEEDED by elogind
664 static int manager_reserve_vt(Manager *m) {
665 _cleanup_free_ char *p = NULL;
669 if (m->reserve_vt <= 0)
672 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
675 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
676 if (m->reserve_vt_fd < 0) {
678 /* Don't complain on VT-less systems */
680 log_warning_errno(errno, "Failed to pin reserved VT: %m");
688 static int manager_connect_bus(Manager *m) {
689 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
695 r = sd_bus_default_system(&m->bus);
697 return log_error_errno(r, "Failed to connect to system bus: %m");
699 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
701 return log_error_errno(r, "Failed to add manager object vtable: %m");
703 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
705 return log_error_errno(r, "Failed to add seat object vtable: %m");
707 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
709 return log_error_errno(r, "Failed to add seat enumerator: %m");
711 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
713 return log_error_errno(r, "Failed to add session object vtable: %m");
715 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
717 return log_error_errno(r, "Failed to add session enumerator: %m");
719 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
721 return log_error_errno(r, "Failed to add user object vtable: %m");
723 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
725 return log_error_errno(r, "Failed to add user enumerator: %m");
727 #if 0 /// elogind does not support systemd as PID 1
728 r = sd_bus_add_match(m->bus,
731 "sender='org.freedesktop.systemd1',"
732 "interface='org.freedesktop.systemd1.Manager',"
733 "member='JobRemoved',"
734 "path='/org/freedesktop/systemd1'",
735 match_job_removed, m);
737 return log_error_errno(r, "Failed to add match for JobRemoved: %m");
739 r = sd_bus_add_match(m->bus,
742 "sender='org.freedesktop.systemd1',"
743 "interface='org.freedesktop.systemd1.Manager',"
744 "member='UnitRemoved',"
745 "path='/org/freedesktop/systemd1'",
746 match_unit_removed, m);
748 return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
750 r = sd_bus_add_match(m->bus,
753 "sender='org.freedesktop.systemd1',"
754 "interface='org.freedesktop.DBus.Properties',"
755 "member='PropertiesChanged'",
756 match_properties_changed, m);
758 return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
760 r = sd_bus_add_match(m->bus,
763 "sender='org.freedesktop.systemd1',"
764 "interface='org.freedesktop.systemd1.Manager',"
765 "member='Reloading',"
766 "path='/org/freedesktop/systemd1'",
769 return log_error_errno(r, "Failed to add match for Reloading: %m");
771 r = sd_bus_call_method(
773 "org.freedesktop.systemd1",
774 "/org/freedesktop/systemd1",
775 "org.freedesktop.systemd1.Manager",
780 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
785 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
787 return log_error_errno(r, "Failed to register name: %m");
789 r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
791 return log_error_errno(r, "Failed to attach bus to event loop: %m");
793 #if 0 /// elogind has to setup its release agent
796 r = elogind_setup_cgroups_agent(m);
802 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
804 Session *active, *iter;
807 * We got a VT-switch signal and we have to acknowledge it immediately.
808 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
809 * old user-space might run multiple sessions on a single VT, *sigh*.
810 * Therefore, we have to iterate all sessions and find one with a vtfd
811 * on the requested VT.
812 * As only VTs with active controllers have VT_PROCESS set, our current
813 * notion of the active VT might be wrong (for instance if the switch
814 * happens while we setup VT_PROCESS). Therefore, read the current VT
815 * first and then use s->active->vtnr as reference. Note that this is
816 * not racy, as no further VT-switch can happen as long as we're in
817 * synchronous VT_PROCESS mode.
821 seat_read_active_vt(m->seat0);
823 active = m->seat0->active;
824 if (!active || active->vtnr < 1) {
825 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
829 if (active->vtfd >= 0) {
830 session_leave_vt(active);
832 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
833 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
834 session_leave_vt(iter);
843 static int manager_connect_console(Manager *m) {
847 assert(m->console_active_fd < 0);
849 /* On certain architectures (S390 and Xen, and containers),
850 /dev/tty0 does not exist, so don't fail if we can't open
852 if (access("/dev/tty0", F_OK) < 0)
855 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
856 if (m->console_active_fd < 0) {
858 /* On some systems the device node /dev/tty0 may exist
859 * even though /sys/class/tty/tty0 does not. */
863 return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
866 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
868 log_error("Failed to watch foreground console");
873 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
874 * as VT-acquire signal. We ignore any acquire-events (yes, we still
875 * have to provide a valid signal-number for it!) and acknowledge all
876 * release events immediately.
879 if (SIGRTMIN + 1 > SIGRTMAX) {
880 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
884 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
885 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
887 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
894 static int manager_connect_udev(Manager *m) {
898 assert(!m->udev_seat_monitor);
899 assert(!m->udev_device_monitor);
900 assert(!m->udev_vcsa_monitor);
901 assert(!m->udev_button_monitor);
903 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
904 if (!m->udev_seat_monitor)
907 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
911 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
915 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);
919 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
920 if (!m->udev_device_monitor)
923 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
927 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
931 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
935 r = udev_monitor_enable_receiving(m->udev_device_monitor);
939 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);
943 /* Don't watch keys if nobody cares */
944 if (m->handle_power_key != HANDLE_IGNORE ||
945 m->handle_suspend_key != HANDLE_IGNORE ||
946 m->handle_hibernate_key != HANDLE_IGNORE ||
947 m->handle_lid_switch != HANDLE_IGNORE ||
948 m->handle_lid_switch_docked != HANDLE_IGNORE) {
950 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
951 if (!m->udev_button_monitor)
954 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
958 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
962 r = udev_monitor_enable_receiving(m->udev_button_monitor);
966 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);
971 /* Don't bother watching VCSA devices, if nobody cares */
972 #if 0 /// elogind does not support autospawning of vts
973 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
975 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
976 if (!m->udev_vcsa_monitor)
979 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
983 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
987 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);
996 static void manager_gc(Manager *m, bool drop_not_started) {
1003 while ((seat = m->seat_gc_queue)) {
1004 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
1005 seat->in_gc_queue = false;
1007 if (!seat_check_gc(seat, drop_not_started)) {
1008 seat_stop(seat, false);
1013 while ((session = m->session_gc_queue)) {
1014 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1015 session->in_gc_queue = false;
1017 /* First, if we are not closing yet, initiate stopping */
1018 if (!session_check_gc(session, drop_not_started) &&
1019 session_get_state(session) != SESSION_CLOSING)
1020 session_stop(session, false);
1022 /* Normally, this should make the session referenced
1023 * again, if it doesn't then let's get rid of it
1025 if (!session_check_gc(session, drop_not_started)) {
1026 session_finalize(session);
1027 session_free(session);
1031 while ((user = m->user_gc_queue)) {
1032 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1033 user->in_gc_queue = false;
1035 /* First step: queue stop jobs */
1036 if (!user_check_gc(user, drop_not_started))
1037 user_stop(user, false);
1039 /* Second step: finalize user */
1040 if (!user_check_gc(user, drop_not_started)) {
1041 user_finalize(user);
1047 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1048 Manager *m = userdata;
1049 struct dual_timestamp since;
1055 if (m->idle_action == HANDLE_IGNORE ||
1056 m->idle_action_usec <= 0)
1059 n = now(CLOCK_MONOTONIC);
1061 r = manager_get_idle_hint(m, &since);
1063 /* Not idle. Let's check if after a timeout it might be idle then. */
1064 elapse = n + m->idle_action_usec;
1066 /* Idle! Let's see if it's time to do something, or if
1067 * we shall sleep for longer. */
1069 if (n >= since.monotonic + m->idle_action_usec &&
1070 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1071 log_info("System idle. Taking action.");
1073 manager_handle_action(m, 0, m->idle_action, false, false);
1074 m->idle_action_not_before_usec = n;
1077 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1080 if (!m->idle_action_event_source) {
1082 r = sd_event_add_time(
1084 &m->idle_action_event_source,
1086 elapse, USEC_PER_SEC*30,
1087 manager_dispatch_idle_action, m);
1089 return log_error_errno(r, "Failed to add idle event source: %m");
1091 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1093 return log_error_errno(r, "Failed to set idle event source priority: %m");
1095 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1097 return log_error_errno(r, "Failed to set idle event timer: %m");
1099 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1101 return log_error_errno(r, "Failed to enable idle event timer: %m");
1107 static int manager_parse_config_file(Manager *m) {
1108 #if 0 /// elogind parses its own config file
1111 return config_parse_many_nulstr(PKGSYSCONFDIR "/logind.conf",
1112 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1114 config_item_perf_lookup, logind_gperf_lookup,
1117 const char* logind_conf = getenv("ELOGIND_CONF_FILE");
1122 logind_conf = PKGSYSCONFDIR "/logind.conf";
1124 return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0",
1125 config_item_perf_lookup, logind_gperf_lookup,
1126 false, false, true, m);
1130 static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1131 Manager *m = userdata;
1134 manager_reset_config(m);
1135 r = manager_parse_config_file(m);
1137 log_warning_errno(r, "Failed to parse config file, using defaults: %m");
1139 log_info("Config file reloaded.");
1141 #if 1 /// elogind needs an Add-On for sleep configuration
1142 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);
1167 /* Connect to console */
1168 r = manager_connect_console(m);
1172 /* Connect to udev */
1173 r = manager_connect_udev(m);
1175 return log_error_errno(r, "Failed to create udev watchers: %m");
1177 /* Connect to the bus */
1178 r = manager_connect_bus(m);
1182 /* Instantiate magic seat 0 */
1183 r = manager_add_seat(m, "seat0", &m->seat0);
1185 return log_error_errno(r, "Failed to add seat0: %m");
1187 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1189 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1191 /* Deserialize state */
1192 r = manager_enumerate_devices(m);
1194 log_warning_errno(r, "Device enumeration failed: %m");
1196 r = manager_enumerate_seats(m);
1198 log_warning_errno(r, "Seat enumeration failed: %m");
1200 r = manager_enumerate_users(m);
1202 log_warning_errno(r, "User enumeration failed: %m");
1204 r = manager_enumerate_sessions(m);
1206 log_warning_errno(r, "Session enumeration failed: %m");
1208 r = manager_enumerate_inhibitors(m);
1210 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1212 r = manager_enumerate_buttons(m);
1214 log_warning_errno(r, "Button enumeration failed: %m");
1216 /* Remove stale objects before we start them */
1217 manager_gc(m, false);
1219 /* Reserve the special reserved VT */
1220 #if 0 /// elogind does not support autospawning of vts
1221 manager_reserve_vt(m);
1224 /* And start everything */
1225 HASHMAP_FOREACH(seat, m->seats, i)
1228 HASHMAP_FOREACH(user, m->users, i)
1231 HASHMAP_FOREACH(session, m->sessions, i)
1232 session_start(session);
1234 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1235 inhibitor_start(inhibitor);
1237 HASHMAP_FOREACH(button, m->buttons, i)
1238 button_check_switches(button);
1240 manager_dispatch_idle_action(NULL, 0, m);
1245 static int manager_run(Manager *m) {
1251 r = sd_event_get_state(m->event);
1254 if (r == SD_EVENT_FINISHED)
1257 manager_gc(m, true);
1259 r = manager_dispatch_delayed(m, false);
1265 r = sd_event_run(m->event, (uint64_t) -1);
1271 int main(int argc, char *argv[]) {
1275 #if 1 /// perform extra checks for elogind startup
1276 r = elogind_startup(argc, argv);
1278 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1281 elogind_set_program_name(argv[0]);
1282 log_set_target(LOG_TARGET_AUTO);
1283 log_set_facility(LOG_AUTH);
1284 log_parse_environment();
1285 #ifdef ENABLE_DEBUG_ELOGIND
1286 log_set_max_level(LOG_DEBUG);
1287 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1288 #endif // ENABLE_DEBUG_ELOGIND
1293 #if 0 /// elogind has some extra functionality at startup, argc can be != 1
1295 log_error("This program takes no arguments.");
1301 r = mac_selinux_init();
1303 log_error_errno(r, "Could not initialize labelling: %m");
1307 /* Always create the directories people can create inotify
1308 * watches in. Note that some applications might check for the
1309 * existence of /run/systemd/seats/ to determine whether
1310 * logind is available, so please always make sure this check
1312 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1313 mkdir_label("/run/systemd/seats", 0755);
1314 mkdir_label("/run/systemd/users", 0755);
1315 mkdir_label("/run/systemd/sessions", 0755);
1317 r = mkdir_label("/run/systemd", 0755);
1318 if ( (r < 0) && (-EEXIST != r) )
1319 return log_error_errno(r, "Failed to create /run/systemd : %m");
1320 r = mkdir_label("/run/systemd/seats", 0755);
1321 if ( r < 0 && (-EEXIST != r) )
1322 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1323 r = mkdir_label("/run/systemd/users", 0755);
1324 if ( r < 0 && (-EEXIST != r) )
1325 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1326 r = mkdir_label("/run/systemd/sessions", 0755);
1327 if ( r < 0 && (-EEXIST != r) )
1328 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1329 r = mkdir_label("/run/systemd/machines", 0755);
1330 if ( r < 0 && (-EEXIST != r) )
1331 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1340 manager_parse_config_file(m);
1342 #if 1 /// elogind needs an Add-On for sleep configuration
1343 elogind_manager_reset_config(m);
1345 r = manager_startup(m);
1347 log_error_errno(r, "Failed to fully start up daemon: %m");
1351 log_debug("elogind running as pid "PID_FMT, getpid_cached());
1355 "STATUS=Processing requests...");
1359 log_debug("elogind stopped as pid "PID_FMT, getpid());
1364 "STATUS=Shutting down...");
1368 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;