1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2011 Lennart Poettering
13 #if 0 /// elogind needs the systems udev header
18 #include "sd-daemon.h"
20 #include "alloc-util.h"
21 #include "bus-error.h"
23 //#include "cgroup-util.h"
25 #include "dirent-util.h"
27 #include "format-util.h"
30 //#include "parse-util.h"
31 //#include "process-util.h"
32 #include "selinux-util.h"
33 #include "signal-util.h"
35 #include "udev-util.h"
36 /// Additional includes needed by elogind
37 #include "cgroup.h" // From src/core/
40 #include "musl_missing.h"
41 #include "process-util.h"
42 #include "cgroup-util.h"
44 static Manager* manager_unref(Manager *m);
45 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref);
47 #if 0 /// elogind does not support autospawning of vts
49 static int manager_new(Manager **ret) {
50 _cleanup_(manager_unrefp) Manager *m = NULL;
59 m->console_active_fd = -1;
60 #if 0 /// UNNEEDED by elogind
61 m->reserve_vt_fd = -1;
64 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
66 m->devices = hashmap_new(&string_hash_ops);
67 m->seats = hashmap_new(&string_hash_ops);
68 m->sessions = hashmap_new(&string_hash_ops);
69 m->users = hashmap_new(NULL);
70 m->inhibitors = hashmap_new(&string_hash_ops);
71 m->buttons = hashmap_new(&string_hash_ops);
73 m->user_units = hashmap_new(&string_hash_ops);
74 m->session_units = hashmap_new(&string_hash_ops);
76 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
79 #if 1 /// elogind needs some more data
80 r = elogind_manager_new(m);
88 r = sd_event_default(&m->event);
92 (void) sd_event_set_watchdog(m->event, true);
94 manager_reset_config(m);
100 static Manager* manager_unref(Manager *m) {
111 while ((session = hashmap_first(m->sessions)))
112 session_free(session);
114 while ((u = hashmap_first(m->users)))
117 while ((d = hashmap_first(m->devices)))
120 while ((s = hashmap_first(m->seats)))
123 while ((i = hashmap_first(m->inhibitors)))
126 while ((b = hashmap_first(m->buttons)))
129 hashmap_free(m->devices);
130 hashmap_free(m->seats);
131 hashmap_free(m->sessions);
132 hashmap_free(m->users);
133 hashmap_free(m->inhibitors);
134 hashmap_free(m->buttons);
136 hashmap_free(m->user_units);
137 hashmap_free(m->session_units);
139 sd_event_source_unref(m->idle_action_event_source);
140 sd_event_source_unref(m->inhibit_timeout_source);
141 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
142 sd_event_source_unref(m->nologin_timeout_source);
143 sd_event_source_unref(m->wall_message_timeout_source);
145 sd_event_source_unref(m->console_active_event_source);
146 sd_event_source_unref(m->udev_seat_event_source);
147 sd_event_source_unref(m->udev_device_event_source);
148 sd_event_source_unref(m->udev_vcsa_event_source);
149 sd_event_source_unref(m->udev_button_event_source);
150 sd_event_source_unref(m->lid_switch_ignore_event_source);
152 safe_close(m->console_active_fd);
154 udev_monitor_unref(m->udev_seat_monitor);
155 udev_monitor_unref(m->udev_device_monitor);
156 udev_monitor_unref(m->udev_vcsa_monitor);
157 udev_monitor_unref(m->udev_button_monitor);
161 if (m->unlink_nologin)
162 (void) unlink_or_warn("/run/nologin");
164 bus_verify_polkit_async_registry_free(m->polkit_registry);
166 sd_bus_unref(m->bus);
167 sd_event_unref(m->event);
169 #if 0 /// elogind does not support autospawning of vts
170 safe_close(m->reserve_vt_fd);
172 #if 1 /// elogind has to free its own data
173 elogind_manager_free(m);
176 strv_free(m->kill_only_users);
177 strv_free(m->kill_exclude_users);
179 free(m->scheduled_shutdown_type);
180 free(m->scheduled_shutdown_tty);
181 free(m->wall_message);
182 #if 0 /// UNNEEDED by elogind
189 static int manager_enumerate_devices(Manager *m) {
190 struct udev_list_entry *item = NULL, *first = NULL;
191 _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *e = NULL;
196 /* Loads devices from udev and creates seats for them as
199 e = udev_enumerate_new(m->udev);
203 r = udev_enumerate_add_match_tag(e, "master-of-seat");
207 r = udev_enumerate_add_match_is_initialized(e);
211 r = udev_enumerate_scan_devices(e);
215 first = udev_enumerate_get_list_entry(e);
216 udev_list_entry_foreach(item, first) {
217 _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
220 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
224 k = manager_process_seat_device(m, d);
232 static int manager_enumerate_buttons(Manager *m) {
233 _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *e = NULL;
234 struct udev_list_entry *item = NULL, *first = NULL;
239 /* Loads buttons from udev */
241 if (manager_all_buttons_ignored(m))
244 e = udev_enumerate_new(m->udev);
248 r = udev_enumerate_add_match_subsystem(e, "input");
252 r = udev_enumerate_add_match_tag(e, "power-switch");
256 r = udev_enumerate_add_match_is_initialized(e);
260 r = udev_enumerate_scan_devices(e);
264 first = udev_enumerate_get_list_entry(e);
265 udev_list_entry_foreach(item, first) {
266 _cleanup_(udev_device_unrefp) struct udev_device *d = NULL;
269 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
273 k = manager_process_button_device(m, d);
281 static int manager_enumerate_seats(Manager *m) {
282 _cleanup_closedir_ DIR *d = NULL;
288 /* This loads data about seats stored on disk, but does not
289 * actually create any seats. Removes data of seats that no
292 d = opendir("/run/systemd/seats");
297 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
300 FOREACH_DIRENT(de, d, return -errno) {
304 if (!dirent_is_file(de))
307 s = hashmap_get(m->seats, de->d_name);
309 if (unlinkat(dirfd(d), de->d_name, 0) < 0)
310 log_warning("Failed to remove /run/systemd/seats/%s: %m",
323 static int manager_enumerate_linger_users(Manager *m) {
324 _cleanup_closedir_ DIR *d = NULL;
330 d = opendir("/var/lib/elogind/linger");
335 return log_error_errno(errno, "Failed to open /var/lib/elogind/linger/: %m");
338 FOREACH_DIRENT(de, d, return -errno) {
341 if (!dirent_is_file(de))
344 k = manager_add_user_by_name(m, de->d_name, NULL);
346 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
354 static int manager_enumerate_users(Manager *m) {
355 _cleanup_closedir_ DIR *d = NULL;
361 /* Add lingering users */
362 r = manager_enumerate_linger_users(m);
364 /* Read in user data stored on disk */
365 d = opendir("/run/systemd/users");
370 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
373 FOREACH_DIRENT(de, d, return -errno) {
376 if (!dirent_is_file(de))
379 k = manager_add_user_by_name(m, de->d_name, &u);
381 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
387 user_add_to_gc_queue(u);
397 static int parse_fdname(const char *fdname, char **session_id, dev_t *dev) {
398 _cleanup_strv_free_ char **parts = NULL;
399 _cleanup_free_ char *id = NULL;
400 unsigned int major, minor;
403 parts = strv_split(fdname, "-");
406 if (strv_length(parts) != 5)
409 if (!streq(parts[0], "session"))
411 id = strdup(parts[1]);
415 if (!streq(parts[2], "device"))
417 r = safe_atou(parts[3], &major) ||
418 safe_atou(parts[4], &minor);
422 *dev = makedev(major, minor);
423 *session_id = TAKE_PTR(id);
428 static int manager_attach_fds(Manager *m) {
429 _cleanup_strv_free_ char **fdnames = NULL;
432 /* Upon restart, PID1 will send us back all fds of session devices
433 * that we previously opened. Each file descriptor is associated
434 * with a given session. The session ids are passed through FDNAMES. */
436 n = sd_listen_fds_with_names(true, &fdnames);
440 for (i = 0; i < n; i++) {
441 _cleanup_free_ char *id = NULL;
448 fd = SD_LISTEN_FDS_START + i;
450 r = parse_fdname(fdnames[i], &id, &dev);
452 log_debug_errno(r, "Failed to parse fd name %s: %m", fdnames[i]);
457 s = hashmap_get(m->sessions, id);
459 /* If the session doesn't exist anymore, the associated session
460 * device attached to this fd doesn't either. Let's simply close
462 log_debug("Failed to attach fd for unknown session: %s", id);
467 if (fstat(fd, &st) < 0) {
468 /* The device is allowed to go away at a random point, in which
469 * case fstat failing is expected. */
470 log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id);
475 if (!S_ISCHR(st.st_mode) || st.st_rdev != dev) {
476 log_debug("Device fd doesn't point to the expected character device node");
481 sd = hashmap_get(s->devices, &dev);
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(dev), minor(dev), s->id);
491 log_debug("Attaching fd to session device [%u:%u] for session %s",
492 major(dev), minor(dev), 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_unrefp) 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_unrefp) 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_unrefp) 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_unrefp) 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) {
696 r = sd_bus_default_system(&m->bus);
698 return log_error_errno(r, "Failed to connect to system bus: %m");
700 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
702 return log_error_errno(r, "Failed to add manager object vtable: %m");
704 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
706 return log_error_errno(r, "Failed to add seat object vtable: %m");
708 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
710 return log_error_errno(r, "Failed to add seat enumerator: %m");
712 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
714 return log_error_errno(r, "Failed to add session object vtable: %m");
716 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
718 return log_error_errno(r, "Failed to add session enumerator: %m");
720 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
722 return log_error_errno(r, "Failed to add user object vtable: %m");
724 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
726 return log_error_errno(r, "Failed to add user enumerator: %m");
728 #if 0 /// elogind does not support systemd as PID 1
729 r = sd_bus_match_signal_async(
732 "org.freedesktop.systemd1",
733 "/org/freedesktop/systemd1",
734 "org.freedesktop.systemd1.Manager",
736 match_job_removed, NULL, m);
738 return log_error_errno(r, "Failed to request match for JobRemoved: %m");
740 r = sd_bus_match_signal_async(
743 "org.freedesktop.systemd1",
744 "/org/freedesktop/systemd1",
745 "org.freedesktop.systemd1.Manager",
747 match_unit_removed, NULL, m);
749 return log_error_errno(r, "Failed to request match for UnitRemoved: %m");
751 r = sd_bus_match_signal_async(
754 "org.freedesktop.systemd1",
756 "org.freedesktop.DBus.Properties",
758 match_properties_changed, NULL, m);
760 return log_error_errno(r, "Failed to request match for PropertiesChanged: %m");
762 r = sd_bus_match_signal_async(
765 "org.freedesktop.systemd1",
766 "/org/freedesktop/systemd1",
767 "org.freedesktop.systemd1.Manager",
769 match_reloading, NULL, m);
771 return log_error_errno(r, "Failed to request match for Reloading: %m");
773 r = sd_bus_call_method_async(
776 "org.freedesktop.systemd1",
777 "/org/freedesktop/systemd1",
778 "org.freedesktop.systemd1.Manager",
784 return log_error_errno(r, "Failed to enable subscription: %m");
786 r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.login1", 0, NULL, NULL);
788 return log_error_errno(r, "Failed to request name: %m");
790 r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
792 return log_error_errno(r, "Failed to attach bus to event loop: %m");
794 #if 0 /// elogind has to setup its release agent
797 r = elogind_setup_cgroups_agent(m);
803 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
805 Session *active, *iter;
808 * We got a VT-switch signal and we have to acknowledge it immediately.
809 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
810 * old user-space might run multiple sessions on a single VT, *sigh*.
811 * Therefore, we have to iterate all sessions and find one with a vtfd
812 * on the requested VT.
813 * As only VTs with active controllers have VT_PROCESS set, our current
814 * notion of the active VT might be wrong (for instance if the switch
815 * happens while we setup VT_PROCESS). Therefore, read the current VT
816 * first and then use s->active->vtnr as reference. Note that this is
817 * not racy, as no further VT-switch can happen as long as we're in
818 * synchronous VT_PROCESS mode.
822 seat_read_active_vt(m->seat0);
824 active = m->seat0->active;
825 if (!active || active->vtnr < 1) {
826 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
830 if (active->vtfd >= 0) {
831 session_leave_vt(active);
833 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
834 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
835 session_leave_vt(iter);
844 static int manager_connect_console(Manager *m) {
848 assert(m->console_active_fd < 0);
850 /* On certain architectures (S390 and Xen, and containers),
851 /dev/tty0 does not exist, so don't fail if we can't open
853 if (access("/dev/tty0", F_OK) < 0)
856 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
857 if (m->console_active_fd < 0) {
859 /* On some systems the device node /dev/tty0 may exist
860 * even though /sys/class/tty/tty0 does not. */
864 return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
867 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
869 log_error("Failed to watch foreground console");
874 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
875 * as VT-acquire signal. We ignore any acquire-events (yes, we still
876 * have to provide a valid signal-number for it!) and acknowledge all
877 * release events immediately.
880 if (SIGRTMIN + 1 > SIGRTMAX) {
881 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
885 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
886 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
888 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
895 static int manager_connect_udev(Manager *m) {
899 assert(!m->udev_seat_monitor);
900 assert(!m->udev_device_monitor);
901 assert(!m->udev_vcsa_monitor);
902 assert(!m->udev_button_monitor);
904 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
905 if (!m->udev_seat_monitor)
908 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
912 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
916 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);
920 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
921 if (!m->udev_device_monitor)
924 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
928 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
932 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
936 r = udev_monitor_enable_receiving(m->udev_device_monitor);
940 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);
944 /* Don't watch keys if nobody cares */
945 if (!manager_all_buttons_ignored(m)) {
946 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
947 if (!m->udev_button_monitor)
950 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
954 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
958 r = udev_monitor_enable_receiving(m->udev_button_monitor);
962 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);
967 /* Don't bother watching VCSA devices, if nobody cares */
968 #if 0 /// elogind does not support autospawning of vts
969 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
971 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
972 if (!m->udev_vcsa_monitor)
975 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
979 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
983 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);
992 static void manager_gc(Manager *m, bool drop_not_started) {
999 while ((seat = m->seat_gc_queue)) {
1000 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
1001 seat->in_gc_queue = false;
1003 if (seat_may_gc(seat, drop_not_started)) {
1004 seat_stop(seat, false);
1009 while ((session = m->session_gc_queue)) {
1010 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1011 session->in_gc_queue = false;
1013 /* First, if we are not closing yet, initiate stopping */
1014 if (session_may_gc(session, drop_not_started) &&
1015 session_get_state(session) != SESSION_CLOSING)
1016 session_stop(session, false);
1018 /* Normally, this should make the session referenced
1019 * again, if it doesn't then let's get rid of it
1021 if (session_may_gc(session, drop_not_started)) {
1022 session_finalize(session);
1023 session_free(session);
1027 while ((user = m->user_gc_queue)) {
1028 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1029 user->in_gc_queue = false;
1031 /* First step: queue stop jobs */
1032 if (user_may_gc(user, drop_not_started))
1033 user_stop(user, false);
1035 /* Second step: finalize user */
1036 if (user_may_gc(user, drop_not_started)) {
1037 user_finalize(user);
1043 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1044 Manager *m = userdata;
1045 struct dual_timestamp since;
1051 if (m->idle_action == HANDLE_IGNORE ||
1052 m->idle_action_usec <= 0)
1055 n = now(CLOCK_MONOTONIC);
1057 r = manager_get_idle_hint(m, &since);
1059 /* Not idle. Let's check if after a timeout it might be idle then. */
1060 elapse = n + m->idle_action_usec;
1062 /* Idle! Let's see if it's time to do something, or if
1063 * we shall sleep for longer. */
1065 if (n >= since.monotonic + m->idle_action_usec &&
1066 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1067 log_info("System idle. Taking action.");
1069 manager_handle_action(m, 0, m->idle_action, false, false);
1070 m->idle_action_not_before_usec = n;
1073 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1076 if (!m->idle_action_event_source) {
1078 r = sd_event_add_time(
1080 &m->idle_action_event_source,
1082 elapse, USEC_PER_SEC*30,
1083 manager_dispatch_idle_action, m);
1085 return log_error_errno(r, "Failed to add idle event source: %m");
1087 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1089 return log_error_errno(r, "Failed to set idle event source priority: %m");
1091 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1093 return log_error_errno(r, "Failed to set idle event timer: %m");
1095 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1097 return log_error_errno(r, "Failed to enable idle event timer: %m");
1103 #if 0 /// elogind parses its own config file
1105 const char* logind_conf = getenv("ELOGIND_CONF_FILE");
1110 logind_conf = PKGSYSCONFDIR "/logind.conf";
1112 return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0",
1113 config_item_perf_lookup, logind_gperf_lookup,
1115 static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1116 Manager *m = userdata;
1119 manager_reset_config(m);
1120 r = manager_parse_config_file(m);
1122 log_warning_errno(r, "Failed to parse config file, using defaults: %m");
1124 log_info("Config file reloaded.");
1126 #if 1 /// elogind needs an Add-On for sleep configuration
1127 elogind_manager_reset_config(m);
1132 static int manager_startup(Manager *m) {
1138 Inhibitor *inhibitor;
1143 assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0);
1145 r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m);
1147 return log_error_errno(r, "Failed to register SIGHUP handler: %m");
1149 #if 1 /// elogind needs some extra preparations before connecting...
1150 elogind_manager_startup(m);
1152 /* Connect to console */
1153 r = manager_connect_console(m);
1157 /* Connect to udev */
1158 r = manager_connect_udev(m);
1160 return log_error_errno(r, "Failed to create udev watchers: %m");
1162 /* Connect to the bus */
1163 r = manager_connect_bus(m);
1167 /* Instantiate magic seat 0 */
1168 r = manager_add_seat(m, "seat0", &m->seat0);
1170 return log_error_errno(r, "Failed to add seat0: %m");
1172 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1174 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1176 /* Deserialize state */
1177 r = manager_enumerate_devices(m);
1179 log_warning_errno(r, "Device enumeration failed: %m");
1181 r = manager_enumerate_seats(m);
1183 log_warning_errno(r, "Seat enumeration failed: %m");
1185 r = manager_enumerate_users(m);
1187 log_warning_errno(r, "User enumeration failed: %m");
1189 r = manager_enumerate_sessions(m);
1191 log_warning_errno(r, "Session enumeration failed: %m");
1193 r = manager_enumerate_inhibitors(m);
1195 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1197 r = manager_enumerate_buttons(m);
1199 log_warning_errno(r, "Button enumeration failed: %m");
1201 /* Remove stale objects before we start them */
1202 manager_gc(m, false);
1204 /* Reserve the special reserved VT */
1205 #if 0 /// elogind does not support autospawning of vts
1206 manager_reserve_vt(m);
1209 /* And start everything */
1210 HASHMAP_FOREACH(seat, m->seats, i)
1213 HASHMAP_FOREACH(user, m->users, i)
1216 HASHMAP_FOREACH(session, m->sessions, i)
1217 session_start(session, NULL);
1219 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1220 inhibitor_start(inhibitor);
1222 HASHMAP_FOREACH(button, m->buttons, i)
1223 button_check_switches(button);
1225 manager_dispatch_idle_action(NULL, 0, m);
1230 static int manager_run(Manager *m) {
1236 r = sd_event_get_state(m->event);
1239 if (r == SD_EVENT_FINISHED)
1242 manager_gc(m, true);
1244 r = manager_dispatch_delayed(m, false);
1250 r = sd_event_run(m->event, (uint64_t) -1);
1256 int main(int argc, char *argv[]) {
1257 _cleanup_(manager_unrefp) Manager *m = NULL;
1260 #if 1 /// perform extra checks for elogind startup
1261 r = elogind_startup(argc, argv);
1263 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1265 elogind_set_program_name(argv[0]);
1266 log_set_target(LOG_TARGET_AUTO);
1267 log_set_facility(LOG_AUTH);
1268 log_parse_environment();
1269 #if ENABLE_DEBUG_ELOGIND
1270 log_set_max_level(LOG_DEBUG);
1271 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1272 #endif // ENABLE_DEBUG_ELOGIND
1277 #if 0 /// elogind has some extra functionality at startup, argc can be != 1
1279 log_error("This program takes no arguments.");
1285 r = mac_selinux_init();
1287 log_error_errno(r, "Could not initialize labelling: %m");
1291 /* Always create the directories people can create inotify
1292 * watches in. Note that some applications might check for the
1293 * existence of /run/systemd/seats/ to determine whether
1294 * logind is available, so please always make sure this check
1296 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1297 mkdir_label("/run/systemd/seats", 0755);
1298 mkdir_label("/run/systemd/users", 0755);
1299 mkdir_label("/run/systemd/sessions", 0755);
1301 r = manager_new(&m);
1303 log_error_errno(r, "Failed to allocate manager object: %m");
1305 r = mkdir_label("/run/systemd", 0755);
1306 if ( (r < 0) && (-EEXIST != r) )
1307 return log_error_errno(r, "Failed to create /run/systemd : %m");
1308 r = mkdir_label("/run/systemd/seats", 0755);
1309 if ( r < 0 && (-EEXIST != r) )
1310 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1311 r = mkdir_label("/run/systemd/users", 0755);
1312 if ( r < 0 && (-EEXIST != r) )
1313 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1314 r = mkdir_label("/run/systemd/sessions", 0755);
1315 if ( r < 0 && (-EEXIST != r) )
1316 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1317 r = mkdir_label("/run/systemd/machines", 0755);
1318 if ( r < 0 && (-EEXIST != r) )
1319 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1324 (void) manager_parse_config_file(m);
1326 #if 1 /// elogind needs an Add-On for sleep configuration
1327 elogind_manager_reset_config(m);
1329 r = manager_startup(m);
1331 log_error_errno(r, "Failed to fully start up daemon: %m");
1335 log_debug("elogind running as pid "PID_FMT, getpid_cached());
1337 (void) sd_notify(false,
1339 "STATUS=Processing requests...");
1343 log_debug("elogind stopped as pid "PID_FMT, getpid_cached());
1345 (void) sd_notify(false,
1347 "STATUS=Shutting down...");
1350 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;