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);
84 #if 1 /// elogind needs an Add-On for sleep configuration
85 elogind_manager_reset_config(m);
89 static Manager *manager_new(void) {
97 m->console_active_fd = -1;
98 #if 0 /// UNNEEDED by elogind
99 m->reserve_vt_fd = -1;
102 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
104 m->devices = hashmap_new(&string_hash_ops);
105 m->seats = hashmap_new(&string_hash_ops);
106 m->sessions = hashmap_new(&string_hash_ops);
107 m->users = hashmap_new(NULL);
108 m->inhibitors = hashmap_new(&string_hash_ops);
109 m->buttons = hashmap_new(&string_hash_ops);
111 m->user_units = hashmap_new(&string_hash_ops);
112 m->session_units = hashmap_new(&string_hash_ops);
114 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
117 #if 1 /// elogind needs some more data
118 r = elogind_manager_new(m);
122 m->udev = udev_new();
126 r = sd_event_default(&m->event);
130 sd_event_set_watchdog(m->event, true);
132 manager_reset_config(m);
141 static void manager_free(Manager *m) {
152 while ((session = hashmap_first(m->sessions)))
153 session_free(session);
155 while ((u = hashmap_first(m->users)))
158 while ((d = hashmap_first(m->devices)))
161 while ((s = hashmap_first(m->seats)))
164 while ((i = hashmap_first(m->inhibitors)))
167 while ((b = hashmap_first(m->buttons)))
170 hashmap_free(m->devices);
171 hashmap_free(m->seats);
172 hashmap_free(m->sessions);
173 hashmap_free(m->users);
174 hashmap_free(m->inhibitors);
175 hashmap_free(m->buttons);
177 hashmap_free(m->user_units);
178 hashmap_free(m->session_units);
180 sd_event_source_unref(m->idle_action_event_source);
181 sd_event_source_unref(m->inhibit_timeout_source);
182 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
183 sd_event_source_unref(m->nologin_timeout_source);
184 sd_event_source_unref(m->wall_message_timeout_source);
186 sd_event_source_unref(m->console_active_event_source);
187 sd_event_source_unref(m->udev_seat_event_source);
188 sd_event_source_unref(m->udev_device_event_source);
189 sd_event_source_unref(m->udev_vcsa_event_source);
190 sd_event_source_unref(m->udev_button_event_source);
191 sd_event_source_unref(m->lid_switch_ignore_event_source);
193 safe_close(m->console_active_fd);
195 udev_monitor_unref(m->udev_seat_monitor);
196 udev_monitor_unref(m->udev_device_monitor);
197 udev_monitor_unref(m->udev_vcsa_monitor);
198 udev_monitor_unref(m->udev_button_monitor);
202 if (m->unlink_nologin)
203 (void) unlink("/run/nologin");
205 bus_verify_polkit_async_registry_free(m->polkit_registry);
207 sd_bus_unref(m->bus);
208 sd_event_unref(m->event);
210 #if 0 /// elogind does not support autospawning of vts
211 safe_close(m->reserve_vt_fd);
213 #if 1 /// elogind has to free its own data
214 elogind_manager_free(m);
217 strv_free(m->kill_only_users);
218 strv_free(m->kill_exclude_users);
220 free(m->scheduled_shutdown_type);
221 free(m->scheduled_shutdown_tty);
222 free(m->wall_message);
223 #if 0 /// UNNEEDED by elogind
229 static int manager_enumerate_devices(Manager *m) {
230 struct udev_list_entry *item = NULL, *first = NULL;
231 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
236 /* Loads devices from udev and creates seats for them as
239 e = udev_enumerate_new(m->udev);
243 r = udev_enumerate_add_match_tag(e, "master-of-seat");
247 r = udev_enumerate_add_match_is_initialized(e);
251 r = udev_enumerate_scan_devices(e);
255 first = udev_enumerate_get_list_entry(e);
256 udev_list_entry_foreach(item, first) {
257 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
260 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
264 k = manager_process_seat_device(m, d);
272 static int manager_enumerate_buttons(Manager *m) {
273 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
274 struct udev_list_entry *item = NULL, *first = NULL;
279 /* Loads buttons from udev */
281 if (m->handle_power_key == HANDLE_IGNORE &&
282 m->handle_suspend_key == HANDLE_IGNORE &&
283 m->handle_hibernate_key == HANDLE_IGNORE &&
284 m->handle_lid_switch == HANDLE_IGNORE &&
285 m->handle_lid_switch_docked == HANDLE_IGNORE)
288 e = udev_enumerate_new(m->udev);
292 r = udev_enumerate_add_match_subsystem(e, "input");
296 r = udev_enumerate_add_match_tag(e, "power-switch");
300 r = udev_enumerate_add_match_is_initialized(e);
304 r = udev_enumerate_scan_devices(e);
308 first = udev_enumerate_get_list_entry(e);
309 udev_list_entry_foreach(item, first) {
310 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
313 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
317 k = manager_process_button_device(m, d);
325 static int manager_enumerate_seats(Manager *m) {
326 _cleanup_closedir_ DIR *d = NULL;
332 /* This loads data about seats stored on disk, but does not
333 * actually create any seats. Removes data of seats that no
336 d = opendir("/run/systemd/seats");
341 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
344 FOREACH_DIRENT(de, d, return -errno) {
348 if (!dirent_is_file(de))
351 s = hashmap_get(m->seats, de->d_name);
353 unlinkat(dirfd(d), de->d_name, 0);
365 static int manager_enumerate_linger_users(Manager *m) {
366 _cleanup_closedir_ DIR *d = NULL;
372 d = opendir("/var/lib/systemd/linger");
377 return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
380 FOREACH_DIRENT(de, d, return -errno) {
383 if (!dirent_is_file(de))
386 k = manager_add_user_by_name(m, de->d_name, NULL);
388 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
396 static int manager_enumerate_users(Manager *m) {
397 _cleanup_closedir_ DIR *d = NULL;
403 /* Add lingering users */
404 r = manager_enumerate_linger_users(m);
406 /* Read in user data stored on disk */
407 d = opendir("/run/systemd/users");
412 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
415 FOREACH_DIRENT(de, d, return -errno) {
418 if (!dirent_is_file(de))
421 k = manager_add_user_by_name(m, de->d_name, &u);
423 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
429 user_add_to_gc_queue(u);
439 static int manager_attach_fds(Manager *m) {
440 _cleanup_strv_free_ char **fdnames = NULL;
443 /* Upon restart, PID1 will send us back all fds of session devices
444 * that we previously opened. Each file descriptor is associated
445 * with a given session. The session ids are passed through FDNAMES. */
447 n = sd_listen_fds_with_names(true, &fdnames);
451 for (i = 0; i < n; i++) {
457 fd = SD_LISTEN_FDS_START + i;
459 id = startswith(fdnames[i], "session-");
463 s = hashmap_get(m->sessions, id);
465 /* If the session doesn't exist anymore, the associated session
466 * device attached to this fd doesn't either. Let's simply close
468 log_debug("Failed to attach fd for unknown session: %s", id);
473 if (fstat(fd, &st) < 0) {
474 /* The device is allowed to go away at a random point, in which
475 * case fstat failing is expected. */
476 log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id);
481 sd = hashmap_get(s->devices, &st.st_rdev);
483 /* Weird we got an fd for a session device which wasn't
484 * recorded in the session state file... */
485 log_warning("Got fd for missing session device [%u:%u] in session %s",
486 major(st.st_rdev), minor(st.st_rdev), s->id);
491 log_debug("Attaching fd to session device [%u:%u] for session %s",
492 major(st.st_rdev), minor(st.st_rdev), s->id);
494 session_device_attach_fd(sd, fd, s->was_active);
500 static int manager_enumerate_sessions(Manager *m) {
501 _cleanup_closedir_ DIR *d = NULL;
507 /* Read in session data stored on disk */
508 d = opendir("/run/systemd/sessions");
513 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
516 FOREACH_DIRENT(de, d, return -errno) {
519 if (!dirent_is_file(de))
522 if (!session_id_valid(de->d_name)) {
523 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
528 k = manager_add_session(m, de->d_name, &s);
530 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
535 session_add_to_gc_queue(s);
542 /* We might be restarted and PID1 could have sent us back the
543 * session device fds we previously saved. */
544 k = manager_attach_fds(m);
546 log_warning_errno(k, "Failed to reattach session device fds: %m");
551 static int manager_enumerate_inhibitors(Manager *m) {
552 _cleanup_closedir_ DIR *d = NULL;
558 d = opendir("/run/systemd/inhibit");
563 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
566 FOREACH_DIRENT(de, d, return -errno) {
570 if (!dirent_is_file(de))
573 k = manager_add_inhibitor(m, de->d_name, &i);
575 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
580 k = inhibitor_load(i);
588 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
589 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
590 Manager *m = userdata;
594 d = udev_monitor_receive_device(m->udev_seat_monitor);
598 manager_process_seat_device(m, d);
602 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
603 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
604 Manager *m = userdata;
608 d = udev_monitor_receive_device(m->udev_device_monitor);
612 manager_process_seat_device(m, d);
616 #if 0 /// UNNEEDED by elogind
617 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
618 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
619 Manager *m = userdata;
624 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
628 name = udev_device_get_sysname(d);
630 /* Whenever a VCSA device is removed try to reallocate our
631 * VTs, to make sure our auto VTs never go away. */
633 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
634 seat_preallocate_vts(m->seat0);
640 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
641 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
642 Manager *m = userdata;
646 d = udev_monitor_receive_device(m->udev_button_monitor);
650 manager_process_button_device(m, d);
654 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
655 Manager *m = userdata;
659 assert(m->console_active_fd == fd);
661 seat_read_active_vt(m->seat0);
665 #if 0 /// UNNEEDED by elogind
666 static int manager_reserve_vt(Manager *m) {
667 _cleanup_free_ char *p = NULL;
671 if (m->reserve_vt <= 0)
674 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
677 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
678 if (m->reserve_vt_fd < 0) {
680 /* Don't complain on VT-less systems */
682 log_warning_errno(errno, "Failed to pin reserved VT: %m");
690 static int manager_connect_bus(Manager *m) {
691 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
697 r = sd_bus_default_system(&m->bus);
699 return log_error_errno(r, "Failed to connect to system bus: %m");
701 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
703 return log_error_errno(r, "Failed to add manager object vtable: %m");
705 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
707 return log_error_errno(r, "Failed to add seat object vtable: %m");
709 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
711 return log_error_errno(r, "Failed to add seat enumerator: %m");
713 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
715 return log_error_errno(r, "Failed to add session object vtable: %m");
717 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
719 return log_error_errno(r, "Failed to add session enumerator: %m");
721 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
723 return log_error_errno(r, "Failed to add user object vtable: %m");
725 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
727 return log_error_errno(r, "Failed to add user enumerator: %m");
729 #if 0 /// elogind does not support systemd as PID 1
730 r = sd_bus_add_match(m->bus,
733 "sender='org.freedesktop.systemd1',"
734 "interface='org.freedesktop.systemd1.Manager',"
735 "member='JobRemoved',"
736 "path='/org/freedesktop/systemd1'",
737 match_job_removed, m);
739 return log_error_errno(r, "Failed to add match for JobRemoved: %m");
741 r = sd_bus_add_match(m->bus,
744 "sender='org.freedesktop.systemd1',"
745 "interface='org.freedesktop.systemd1.Manager',"
746 "member='UnitRemoved',"
747 "path='/org/freedesktop/systemd1'",
748 match_unit_removed, m);
750 return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
752 r = sd_bus_add_match(m->bus,
755 "sender='org.freedesktop.systemd1',"
756 "interface='org.freedesktop.DBus.Properties',"
757 "member='PropertiesChanged'",
758 match_properties_changed, m);
760 return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
762 r = sd_bus_add_match(m->bus,
765 "sender='org.freedesktop.systemd1',"
766 "interface='org.freedesktop.systemd1.Manager',"
767 "member='Reloading',"
768 "path='/org/freedesktop/systemd1'",
771 return log_error_errno(r, "Failed to add match for Reloading: %m");
773 r = sd_bus_call_method(
775 "org.freedesktop.systemd1",
776 "/org/freedesktop/systemd1",
777 "org.freedesktop.systemd1.Manager",
782 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
787 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
789 return log_error_errno(r, "Failed to register name: %m");
791 r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
793 return log_error_errno(r, "Failed to attach bus to event loop: %m");
795 #if 0 /// elogind has to setup its release agent
798 elogind_bus_setup_system(m);
799 r = elogind_setup_cgroups_agent(m);
805 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
807 Session *active, *iter;
810 * We got a VT-switch signal and we have to acknowledge it immediately.
811 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
812 * old user-space might run multiple sessions on a single VT, *sigh*.
813 * Therefore, we have to iterate all sessions and find one with a vtfd
814 * on the requested VT.
815 * As only VTs with active controllers have VT_PROCESS set, our current
816 * notion of the active VT might be wrong (for instance if the switch
817 * happens while we setup VT_PROCESS). Therefore, read the current VT
818 * first and then use s->active->vtnr as reference. Note that this is
819 * not racy, as no further VT-switch can happen as long as we're in
820 * synchronous VT_PROCESS mode.
824 seat_read_active_vt(m->seat0);
826 active = m->seat0->active;
827 if (!active || active->vtnr < 1) {
828 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
832 if (active->vtfd >= 0) {
833 session_leave_vt(active);
835 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
836 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
837 session_leave_vt(iter);
846 static int manager_connect_console(Manager *m) {
850 assert(m->console_active_fd < 0);
852 /* On certain architectures (S390 and Xen, and containers),
853 /dev/tty0 does not exist, so don't fail if we can't open
855 if (access("/dev/tty0", F_OK) < 0)
858 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
859 if (m->console_active_fd < 0) {
861 /* On some systems the device node /dev/tty0 may exist
862 * even though /sys/class/tty/tty0 does not. */
866 return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
869 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
871 log_error("Failed to watch foreground console");
876 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
877 * as VT-acquire signal. We ignore any acquire-events (yes, we still
878 * have to provide a valid signal-number for it!) and acknowledge all
879 * release events immediately.
882 if (SIGRTMIN + 1 > SIGRTMAX) {
883 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
887 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
888 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
890 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
897 static int manager_connect_udev(Manager *m) {
901 assert(!m->udev_seat_monitor);
902 assert(!m->udev_device_monitor);
903 assert(!m->udev_vcsa_monitor);
904 assert(!m->udev_button_monitor);
906 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
907 if (!m->udev_seat_monitor)
910 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
914 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
918 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);
922 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
923 if (!m->udev_device_monitor)
926 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
930 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
934 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
938 r = udev_monitor_enable_receiving(m->udev_device_monitor);
942 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);
946 /* Don't watch keys if nobody cares */
947 if (m->handle_power_key != HANDLE_IGNORE ||
948 m->handle_suspend_key != HANDLE_IGNORE ||
949 m->handle_hibernate_key != HANDLE_IGNORE ||
950 m->handle_lid_switch != HANDLE_IGNORE ||
951 m->handle_lid_switch_docked != HANDLE_IGNORE) {
953 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
954 if (!m->udev_button_monitor)
957 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
961 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
965 r = udev_monitor_enable_receiving(m->udev_button_monitor);
969 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);
974 /* Don't bother watching VCSA devices, if nobody cares */
975 #if 0 /// elogind does not support autospawning of vts
976 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
978 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
979 if (!m->udev_vcsa_monitor)
982 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
986 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
990 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);
999 static void manager_gc(Manager *m, bool drop_not_started) {
1006 while ((seat = m->seat_gc_queue)) {
1007 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
1008 seat->in_gc_queue = false;
1010 if (!seat_check_gc(seat, drop_not_started)) {
1011 seat_stop(seat, false);
1016 while ((session = m->session_gc_queue)) {
1017 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1018 session->in_gc_queue = false;
1020 /* First, if we are not closing yet, initiate stopping */
1021 if (!session_check_gc(session, drop_not_started) &&
1022 session_get_state(session) != SESSION_CLOSING)
1023 session_stop(session, false);
1025 /* Normally, this should make the session referenced
1026 * again, if it doesn't then let's get rid of it
1028 if (!session_check_gc(session, drop_not_started)) {
1029 session_finalize(session);
1030 session_free(session);
1034 while ((user = m->user_gc_queue)) {
1035 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1036 user->in_gc_queue = false;
1038 /* First step: queue stop jobs */
1039 if (!user_check_gc(user, drop_not_started))
1040 user_stop(user, false);
1042 /* Second step: finalize user */
1043 if (!user_check_gc(user, drop_not_started)) {
1044 user_finalize(user);
1050 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1051 Manager *m = userdata;
1052 struct dual_timestamp since;
1058 if (m->idle_action == HANDLE_IGNORE ||
1059 m->idle_action_usec <= 0)
1062 n = now(CLOCK_MONOTONIC);
1064 r = manager_get_idle_hint(m, &since);
1066 /* Not idle. Let's check if after a timeout it might be idle then. */
1067 elapse = n + m->idle_action_usec;
1069 /* Idle! Let's see if it's time to do something, or if
1070 * we shall sleep for longer. */
1072 if (n >= since.monotonic + m->idle_action_usec &&
1073 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1074 log_info("System idle. Taking action.");
1076 manager_handle_action(m, 0, m->idle_action, false, false);
1077 m->idle_action_not_before_usec = n;
1080 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1083 if (!m->idle_action_event_source) {
1085 r = sd_event_add_time(
1087 &m->idle_action_event_source,
1089 elapse, USEC_PER_SEC*30,
1090 manager_dispatch_idle_action, m);
1092 return log_error_errno(r, "Failed to add idle event source: %m");
1094 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1096 return log_error_errno(r, "Failed to set idle event source priority: %m");
1098 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1100 return log_error_errno(r, "Failed to set idle event timer: %m");
1102 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1104 return log_error_errno(r, "Failed to enable idle event timer: %m");
1110 static int manager_parse_config_file(Manager *m) {
1111 #if 0 /// elogind parses its own config file
1114 return config_parse_many_nulstr(PKGSYSCONFDIR "/logind.conf",
1115 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1117 config_item_perf_lookup, logind_gperf_lookup,
1120 const char* logind_conf = getenv("ELOGIND_CONF_FILE");
1125 logind_conf = PKGSYSCONFDIR "/logind.conf";
1127 return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0",
1128 config_item_perf_lookup, logind_gperf_lookup,
1129 false, false, true, m);
1133 static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1134 Manager *m = userdata;
1137 manager_reset_config(m);
1138 r = manager_parse_config_file(m);
1140 log_warning_errno(r, "Failed to parse config file, using defaults: %m");
1142 log_info("Config file reloaded.");
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 /* Connect to console */
1165 r = manager_connect_console(m);
1169 /* Connect to udev */
1170 r = manager_connect_udev(m);
1172 return log_error_errno(r, "Failed to create udev watchers: %m");
1174 /* Connect to the bus */
1175 r = manager_connect_bus(m);
1179 /* Instantiate magic seat 0 */
1180 r = manager_add_seat(m, "seat0", &m->seat0);
1182 return log_error_errno(r, "Failed to add seat0: %m");
1184 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1186 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1188 /* Deserialize state */
1189 r = manager_enumerate_devices(m);
1191 log_warning_errno(r, "Device enumeration failed: %m");
1193 r = manager_enumerate_seats(m);
1195 log_warning_errno(r, "Seat enumeration failed: %m");
1197 r = manager_enumerate_users(m);
1199 log_warning_errno(r, "User enumeration failed: %m");
1201 r = manager_enumerate_sessions(m);
1203 log_warning_errno(r, "Session enumeration failed: %m");
1205 r = manager_enumerate_inhibitors(m);
1207 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1209 r = manager_enumerate_buttons(m);
1211 log_warning_errno(r, "Button enumeration failed: %m");
1213 /* Remove stale objects before we start them */
1214 manager_gc(m, false);
1216 /* Reserve the special reserved VT */
1217 #if 0 /// elogind does not support autospawning of vts
1218 manager_reserve_vt(m);
1221 /* And start everything */
1222 HASHMAP_FOREACH(seat, m->seats, i)
1225 HASHMAP_FOREACH(user, m->users, i)
1228 HASHMAP_FOREACH(session, m->sessions, i)
1229 session_start(session);
1231 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1232 inhibitor_start(inhibitor);
1234 HASHMAP_FOREACH(button, m->buttons, i)
1235 button_check_switches(button);
1237 manager_dispatch_idle_action(NULL, 0, m);
1242 static int manager_run(Manager *m) {
1248 r = sd_event_get_state(m->event);
1251 if (r == SD_EVENT_FINISHED)
1254 manager_gc(m, true);
1256 r = manager_dispatch_delayed(m, false);
1262 r = sd_event_run(m->event, (uint64_t) -1);
1268 int main(int argc, char *argv[]) {
1272 elogind_set_program_name(argv[0]);
1273 log_set_target(LOG_TARGET_AUTO);
1274 log_set_facility(LOG_AUTH);
1275 log_parse_environment();
1276 #ifdef ENABLE_DEBUG_ELOGIND
1277 log_set_max_level(LOG_DEBUG);
1278 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1279 #endif // ENABLE_DEBUG_ELOGIND
1285 log_error("This program takes no arguments.");
1290 r = mac_selinux_init();
1292 log_error_errno(r, "Could not initialize labelling: %m");
1296 /* Always create the directories people can create inotify
1297 * watches in. Note that some applications might check for the
1298 * existence of /run/systemd/seats/ to determine whether
1299 * logind is available, so please always make sure this check
1301 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1302 mkdir_label("/run/systemd/seats", 0755);
1303 mkdir_label("/run/systemd/users", 0755);
1304 mkdir_label("/run/systemd/sessions", 0755);
1306 r = mkdir_label("/run/systemd", 0755);
1307 if ( (r < 0) && (-EEXIST != r) )
1308 return log_error_errno(r, "Failed to create /run/systemd : %m");
1309 r = mkdir_label("/run/systemd/seats", 0755);
1310 if ( r < 0 && (-EEXIST != r) )
1311 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1312 r = mkdir_label("/run/systemd/users", 0755);
1313 if ( r < 0 && (-EEXIST != r) )
1314 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1315 r = mkdir_label("/run/systemd/sessions", 0755);
1316 if ( r < 0 && (-EEXIST != r) )
1317 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1318 r = mkdir_label("/run/systemd/machines", 0755);
1319 if ( r < 0 && (-EEXIST != r) )
1320 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1329 manager_parse_config_file(m);
1331 r = manager_startup(m);
1333 log_error_errno(r, "Failed to fully start up daemon: %m");
1337 log_debug("elogind running as pid "PID_FMT, getpid());
1341 "STATUS=Processing requests...");
1345 log_debug("elogind stopped as pid "PID_FMT, getpid());
1350 "STATUS=Shutting down...");
1354 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;