1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2011 Lennart Poettering
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #if 0 /// elogind needs the systems udev header
31 #include "sd-daemon.h"
33 #include "alloc-util.h"
34 #include "bus-error.h"
36 //#include "cgroup-util.h"
37 #include "conf-parser.h"
39 #include "dirent-util.h"
41 #include "format-util.h"
44 //#include "process-util.h"
45 #include "selinux-util.h"
46 #include "signal-util.h"
48 #include "udev-util.h"
49 /// Additional includes needed by elogind
50 #include "cgroup.h" // From src/core/
53 #include "musl_missing.h"
54 #include "process-util.h"
55 #include "cgroup-util.h"
57 static void manager_free(Manager *m);
59 static void manager_reset_config(Manager *m) {
60 #if 0 /// elogind does not support autospawning of vts
65 m->inhibit_delay_max = 5 * USEC_PER_SEC;
66 m->handle_power_key = HANDLE_POWEROFF;
67 m->handle_suspend_key = HANDLE_SUSPEND;
68 m->handle_hibernate_key = HANDLE_HIBERNATE;
69 m->handle_lid_switch = HANDLE_SUSPEND;
70 m->handle_lid_switch_ep = _HANDLE_ACTION_INVALID;
71 m->handle_lid_switch_docked = HANDLE_IGNORE;
72 m->power_key_ignore_inhibited = false;
73 m->suspend_key_ignore_inhibited = false;
74 m->hibernate_key_ignore_inhibited = false;
75 m->lid_switch_ignore_inhibited = true;
77 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
79 m->idle_action_usec = 30 * USEC_PER_MINUTE;
80 m->idle_action = HANDLE_IGNORE;
82 m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */
83 m->user_tasks_max = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); /* 33% */
84 m->sessions_max = 8192;
85 m->inhibitors_max = 8192;
87 m->kill_user_processes = KILL_USER_PROCESSES;
89 m->kill_only_users = strv_free(m->kill_only_users);
90 m->kill_exclude_users = strv_free(m->kill_exclude_users);
93 static Manager *manager_new(void) {
101 m->console_active_fd = -1;
102 #if 0 /// UNNEEDED by elogind
103 m->reserve_vt_fd = -1;
106 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
108 m->devices = hashmap_new(&string_hash_ops);
109 m->seats = hashmap_new(&string_hash_ops);
110 m->sessions = hashmap_new(&string_hash_ops);
111 m->users = hashmap_new(NULL);
112 m->inhibitors = hashmap_new(&string_hash_ops);
113 m->buttons = hashmap_new(&string_hash_ops);
115 m->user_units = hashmap_new(&string_hash_ops);
116 m->session_units = hashmap_new(&string_hash_ops);
118 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
121 #if 1 /// elogind needs some more data
122 r = elogind_manager_new(m);
126 m->udev = udev_new();
130 r = sd_event_default(&m->event);
134 sd_event_set_watchdog(m->event, true);
136 manager_reset_config(m);
145 static void manager_free(Manager *m) {
156 while ((session = hashmap_first(m->sessions)))
157 session_free(session);
159 while ((u = hashmap_first(m->users)))
162 while ((d = hashmap_first(m->devices)))
165 while ((s = hashmap_first(m->seats)))
168 while ((i = hashmap_first(m->inhibitors)))
171 while ((b = hashmap_first(m->buttons)))
174 hashmap_free(m->devices);
175 hashmap_free(m->seats);
176 hashmap_free(m->sessions);
177 hashmap_free(m->users);
178 hashmap_free(m->inhibitors);
179 hashmap_free(m->buttons);
181 hashmap_free(m->user_units);
182 hashmap_free(m->session_units);
184 sd_event_source_unref(m->idle_action_event_source);
185 sd_event_source_unref(m->inhibit_timeout_source);
186 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
187 sd_event_source_unref(m->nologin_timeout_source);
188 sd_event_source_unref(m->wall_message_timeout_source);
190 sd_event_source_unref(m->console_active_event_source);
191 sd_event_source_unref(m->udev_seat_event_source);
192 sd_event_source_unref(m->udev_device_event_source);
193 sd_event_source_unref(m->udev_vcsa_event_source);
194 sd_event_source_unref(m->udev_button_event_source);
195 sd_event_source_unref(m->lid_switch_ignore_event_source);
197 safe_close(m->console_active_fd);
199 udev_monitor_unref(m->udev_seat_monitor);
200 udev_monitor_unref(m->udev_device_monitor);
201 udev_monitor_unref(m->udev_vcsa_monitor);
202 udev_monitor_unref(m->udev_button_monitor);
206 if (m->unlink_nologin)
207 (void) unlink_or_warn("/run/nologin");
209 bus_verify_polkit_async_registry_free(m->polkit_registry);
211 sd_bus_unref(m->bus);
212 sd_event_unref(m->event);
214 #if 0 /// elogind does not support autospawning of vts
215 safe_close(m->reserve_vt_fd);
217 #if 1 /// elogind has to free its own data
218 elogind_manager_free(m);
221 strv_free(m->kill_only_users);
222 strv_free(m->kill_exclude_users);
224 free(m->scheduled_shutdown_type);
225 free(m->scheduled_shutdown_tty);
226 free(m->wall_message);
227 #if 0 /// UNNEEDED by elogind
233 static int manager_enumerate_devices(Manager *m) {
234 struct udev_list_entry *item = NULL, *first = NULL;
235 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
240 /* Loads devices from udev and creates seats for them as
243 e = udev_enumerate_new(m->udev);
247 r = udev_enumerate_add_match_tag(e, "master-of-seat");
251 r = udev_enumerate_add_match_is_initialized(e);
255 r = udev_enumerate_scan_devices(e);
259 first = udev_enumerate_get_list_entry(e);
260 udev_list_entry_foreach(item, first) {
261 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
264 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
268 k = manager_process_seat_device(m, d);
276 static int manager_enumerate_buttons(Manager *m) {
277 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
278 struct udev_list_entry *item = NULL, *first = NULL;
283 /* Loads buttons from udev */
285 if (manager_all_buttons_ignored(m))
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 if (unlinkat(dirfd(d), de->d_name, 0) < 0)
354 log_warning("Failed to remove /run/systemd/seats/%s: %m",
367 static int manager_enumerate_linger_users(Manager *m) {
368 _cleanup_closedir_ DIR *d = NULL;
374 d = opendir("/var/lib/elogind/linger");
379 return log_error_errno(errno, "Failed to open /var/lib/elogind/linger/: %m");
382 FOREACH_DIRENT(de, d, return -errno) {
385 if (!dirent_is_file(de))
388 k = manager_add_user_by_name(m, de->d_name, NULL);
390 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
398 static int manager_enumerate_users(Manager *m) {
399 _cleanup_closedir_ DIR *d = NULL;
405 /* Add lingering users */
406 r = manager_enumerate_linger_users(m);
408 /* Read in user data stored on disk */
409 d = opendir("/run/systemd/users");
414 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
417 FOREACH_DIRENT(de, d, return -errno) {
420 if (!dirent_is_file(de))
423 k = manager_add_user_by_name(m, de->d_name, &u);
425 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
431 user_add_to_gc_queue(u);
441 static int manager_attach_fds(Manager *m) {
442 _cleanup_strv_free_ char **fdnames = NULL;
445 /* Upon restart, PID1 will send us back all fds of session devices
446 * that we previously opened. Each file descriptor is associated
447 * with a given session. The session ids are passed through FDNAMES. */
449 n = sd_listen_fds_with_names(true, &fdnames);
453 for (i = 0; i < n; i++) {
459 fd = SD_LISTEN_FDS_START + i;
461 id = startswith(fdnames[i], "session-");
465 s = hashmap_get(m->sessions, id);
467 /* If the session doesn't exist anymore, the associated session
468 * device attached to this fd doesn't either. Let's simply close
470 log_debug("Failed to attach fd for unknown session: %s", id);
475 if (fstat(fd, &st) < 0) {
476 /* The device is allowed to go away at a random point, in which
477 * case fstat failing is expected. */
478 log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id);
483 if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) {
484 log_debug("Device fd doesn't actually point to device node: %m");
489 sd = hashmap_get(s->devices, &st.st_rdev);
491 /* Weird, we got an fd for a session device which wasn't
492 * recorded in the session state file... */
493 log_warning("Got fd for missing session device [%u:%u] in session %s",
494 major(st.st_rdev), minor(st.st_rdev), s->id);
499 log_debug("Attaching fd to session device [%u:%u] for session %s",
500 major(st.st_rdev), minor(st.st_rdev), s->id);
502 session_device_attach_fd(sd, fd, s->was_active);
508 static int manager_enumerate_sessions(Manager *m) {
509 _cleanup_closedir_ DIR *d = NULL;
515 /* Read in session data stored on disk */
516 d = opendir("/run/systemd/sessions");
521 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
524 FOREACH_DIRENT(de, d, return -errno) {
527 if (!dirent_is_file(de))
530 if (!session_id_valid(de->d_name)) {
531 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
536 k = manager_add_session(m, de->d_name, &s);
538 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
543 session_add_to_gc_queue(s);
550 /* We might be restarted and PID1 could have sent us back the
551 * session device fds we previously saved. */
552 k = manager_attach_fds(m);
554 log_warning_errno(k, "Failed to reattach session device fds: %m");
559 static int manager_enumerate_inhibitors(Manager *m) {
560 _cleanup_closedir_ DIR *d = NULL;
566 d = opendir("/run/systemd/inhibit");
571 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
574 FOREACH_DIRENT(de, d, return -errno) {
578 if (!dirent_is_file(de))
581 k = manager_add_inhibitor(m, de->d_name, &i);
583 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
588 k = inhibitor_load(i);
596 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
597 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
598 Manager *m = userdata;
602 d = udev_monitor_receive_device(m->udev_seat_monitor);
606 manager_process_seat_device(m, d);
610 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
611 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
612 Manager *m = userdata;
616 d = udev_monitor_receive_device(m->udev_device_monitor);
620 manager_process_seat_device(m, d);
624 #if 0 /// UNNEEDED by elogind
625 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
626 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
627 Manager *m = userdata;
632 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
636 name = udev_device_get_sysname(d);
638 /* Whenever a VCSA device is removed try to reallocate our
639 * VTs, to make sure our auto VTs never go away. */
641 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
642 seat_preallocate_vts(m->seat0);
648 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
649 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
650 Manager *m = userdata;
654 d = udev_monitor_receive_device(m->udev_button_monitor);
658 manager_process_button_device(m, d);
662 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
663 Manager *m = userdata;
667 assert(m->console_active_fd == fd);
669 seat_read_active_vt(m->seat0);
673 #if 0 /// UNNEEDED by elogind
674 static int manager_reserve_vt(Manager *m) {
675 _cleanup_free_ char *p = NULL;
679 if (m->reserve_vt <= 0)
682 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
685 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
686 if (m->reserve_vt_fd < 0) {
688 /* Don't complain on VT-less systems */
690 log_warning_errno(errno, "Failed to pin reserved VT: %m");
698 static int manager_connect_bus(Manager *m) {
704 r = sd_bus_default_system(&m->bus);
706 return log_error_errno(r, "Failed to connect to system bus: %m");
708 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
710 return log_error_errno(r, "Failed to add manager object vtable: %m");
712 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
714 return log_error_errno(r, "Failed to add seat object vtable: %m");
716 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
718 return log_error_errno(r, "Failed to add seat enumerator: %m");
720 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
722 return log_error_errno(r, "Failed to add session object vtable: %m");
724 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
726 return log_error_errno(r, "Failed to add session enumerator: %m");
728 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
730 return log_error_errno(r, "Failed to add user object vtable: %m");
732 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
734 return log_error_errno(r, "Failed to add user enumerator: %m");
736 #if 0 /// elogind does not support systemd as PID 1
737 r = sd_bus_match_signal_async(
740 "org.freedesktop.systemd1",
741 "/org/freedesktop/systemd1",
742 "org.freedesktop.systemd1.Manager",
744 match_job_removed, NULL, m);
746 return log_error_errno(r, "Failed to request match for JobRemoved: %m");
748 r = sd_bus_match_signal_async(
751 "org.freedesktop.systemd1",
752 "/org/freedesktop/systemd1",
753 "org.freedesktop.systemd1.Manager",
755 match_unit_removed, NULL, m);
757 return log_error_errno(r, "Failed to request match for UnitRemoved: %m");
759 r = sd_bus_match_signal_async(
762 "org.freedesktop.systemd1",
764 "org.freedesktop.DBus.Properties",
766 match_properties_changed, NULL, m);
768 return log_error_errno(r, "Failed to request match for PropertiesChanged: %m");
770 r = sd_bus_match_signal_async(
773 "org.freedesktop.systemd1",
774 "/org/freedesktop/systemd1",
775 "org.freedesktop.systemd1.Manager",
777 match_reloading, NULL, m);
779 return log_error_errno(r, "Failed to request match for Reloading: %m");
781 r = sd_bus_call_method_async(
784 "org.freedesktop.systemd1",
785 "/org/freedesktop/systemd1",
786 "org.freedesktop.systemd1.Manager",
792 return log_error_errno(r, "Failed to enable subscription: %m");
794 r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.login1", 0, NULL, NULL);
796 return log_error_errno(r, "Failed to request name: %m");
798 r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
800 return log_error_errno(r, "Failed to attach bus to event loop: %m");
802 #if 0 /// elogind has to setup its release agent
805 r = elogind_setup_cgroups_agent(m);
811 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
813 Session *active, *iter;
816 * We got a VT-switch signal and we have to acknowledge it immediately.
817 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
818 * old user-space might run multiple sessions on a single VT, *sigh*.
819 * Therefore, we have to iterate all sessions and find one with a vtfd
820 * on the requested VT.
821 * As only VTs with active controllers have VT_PROCESS set, our current
822 * notion of the active VT might be wrong (for instance if the switch
823 * happens while we setup VT_PROCESS). Therefore, read the current VT
824 * first and then use s->active->vtnr as reference. Note that this is
825 * not racy, as no further VT-switch can happen as long as we're in
826 * synchronous VT_PROCESS mode.
830 seat_read_active_vt(m->seat0);
832 active = m->seat0->active;
833 if (!active || active->vtnr < 1) {
834 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
838 if (active->vtfd >= 0) {
839 session_leave_vt(active);
841 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
842 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
843 session_leave_vt(iter);
852 static int manager_connect_console(Manager *m) {
856 assert(m->console_active_fd < 0);
858 /* On certain architectures (S390 and Xen, and containers),
859 /dev/tty0 does not exist, so don't fail if we can't open
861 if (access("/dev/tty0", F_OK) < 0)
864 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
865 if (m->console_active_fd < 0) {
867 /* On some systems the device node /dev/tty0 may exist
868 * even though /sys/class/tty/tty0 does not. */
872 return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
875 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
877 log_error("Failed to watch foreground console");
882 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
883 * as VT-acquire signal. We ignore any acquire-events (yes, we still
884 * have to provide a valid signal-number for it!) and acknowledge all
885 * release events immediately.
888 if (SIGRTMIN + 1 > SIGRTMAX) {
889 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
893 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
894 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
896 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
903 static int manager_connect_udev(Manager *m) {
907 assert(!m->udev_seat_monitor);
908 assert(!m->udev_device_monitor);
909 assert(!m->udev_vcsa_monitor);
910 assert(!m->udev_button_monitor);
912 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
913 if (!m->udev_seat_monitor)
916 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
920 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
924 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);
928 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
929 if (!m->udev_device_monitor)
932 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
936 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
940 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
944 r = udev_monitor_enable_receiving(m->udev_device_monitor);
948 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);
952 /* Don't watch keys if nobody cares */
953 if (!manager_all_buttons_ignored(m)) {
954 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
955 if (!m->udev_button_monitor)
958 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
962 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
966 r = udev_monitor_enable_receiving(m->udev_button_monitor);
970 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);
975 /* Don't bother watching VCSA devices, if nobody cares */
976 #if 0 /// elogind does not support autospawning of vts
977 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
979 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
980 if (!m->udev_vcsa_monitor)
983 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
987 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
991 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);
1000 static void manager_gc(Manager *m, bool drop_not_started) {
1007 while ((seat = m->seat_gc_queue)) {
1008 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
1009 seat->in_gc_queue = false;
1011 if (seat_may_gc(seat, drop_not_started)) {
1012 seat_stop(seat, false);
1017 while ((session = m->session_gc_queue)) {
1018 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1019 session->in_gc_queue = false;
1021 /* First, if we are not closing yet, initiate stopping */
1022 if (session_may_gc(session, drop_not_started) &&
1023 session_get_state(session) != SESSION_CLOSING)
1024 session_stop(session, false);
1026 /* Normally, this should make the session referenced
1027 * again, if it doesn't then let's get rid of it
1029 if (session_may_gc(session, drop_not_started)) {
1030 session_finalize(session);
1031 session_free(session);
1035 while ((user = m->user_gc_queue)) {
1036 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1037 user->in_gc_queue = false;
1039 /* First step: queue stop jobs */
1040 if (user_may_gc(user, drop_not_started))
1041 user_stop(user, false);
1043 /* Second step: finalize user */
1044 if (user_may_gc(user, drop_not_started)) {
1045 user_finalize(user);
1051 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1052 Manager *m = userdata;
1053 struct dual_timestamp since;
1059 if (m->idle_action == HANDLE_IGNORE ||
1060 m->idle_action_usec <= 0)
1063 n = now(CLOCK_MONOTONIC);
1065 r = manager_get_idle_hint(m, &since);
1067 /* Not idle. Let's check if after a timeout it might be idle then. */
1068 elapse = n + m->idle_action_usec;
1070 /* Idle! Let's see if it's time to do something, or if
1071 * we shall sleep for longer. */
1073 if (n >= since.monotonic + m->idle_action_usec &&
1074 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1075 log_info("System idle. Taking action.");
1077 manager_handle_action(m, 0, m->idle_action, false, false);
1078 m->idle_action_not_before_usec = n;
1081 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1084 if (!m->idle_action_event_source) {
1086 r = sd_event_add_time(
1088 &m->idle_action_event_source,
1090 elapse, USEC_PER_SEC*30,
1091 manager_dispatch_idle_action, m);
1093 return log_error_errno(r, "Failed to add idle event source: %m");
1095 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1097 return log_error_errno(r, "Failed to set idle event source priority: %m");
1099 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1101 return log_error_errno(r, "Failed to set idle event timer: %m");
1103 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1105 return log_error_errno(r, "Failed to enable idle event timer: %m");
1111 static int manager_parse_config_file(Manager *m) {
1112 #if 0 /// elogind parses its own config file
1115 return config_parse_many_nulstr(PKGSYSCONFDIR "/logind.conf",
1116 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1118 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,
1130 CONFIG_PARSE_WARN, 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.");
1144 #if 1 /// elogind needs an Add-On for sleep configuration
1145 elogind_manager_reset_config(m);
1150 static int manager_startup(Manager *m) {
1156 Inhibitor *inhibitor;
1161 assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0);
1163 r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m);
1165 return log_error_errno(r, "Failed to register SIGHUP handler: %m");
1167 #if 1 /// elogind needs some extra preparations before connecting...
1168 elogind_manager_startup(m);
1170 /* Connect to console */
1171 r = manager_connect_console(m);
1175 /* Connect to udev */
1176 r = manager_connect_udev(m);
1178 return log_error_errno(r, "Failed to create udev watchers: %m");
1180 /* Connect to the bus */
1181 r = manager_connect_bus(m);
1185 /* Instantiate magic seat 0 */
1186 r = manager_add_seat(m, "seat0", &m->seat0);
1188 return log_error_errno(r, "Failed to add seat0: %m");
1190 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1192 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1194 /* Deserialize state */
1195 r = manager_enumerate_devices(m);
1197 log_warning_errno(r, "Device enumeration failed: %m");
1199 r = manager_enumerate_seats(m);
1201 log_warning_errno(r, "Seat enumeration failed: %m");
1203 r = manager_enumerate_users(m);
1205 log_warning_errno(r, "User enumeration failed: %m");
1207 r = manager_enumerate_sessions(m);
1209 log_warning_errno(r, "Session enumeration failed: %m");
1211 r = manager_enumerate_inhibitors(m);
1213 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1215 r = manager_enumerate_buttons(m);
1217 log_warning_errno(r, "Button enumeration failed: %m");
1219 /* Remove stale objects before we start them */
1220 manager_gc(m, false);
1222 /* Reserve the special reserved VT */
1223 #if 0 /// elogind does not support autospawning of vts
1224 manager_reserve_vt(m);
1227 /* And start everything */
1228 HASHMAP_FOREACH(seat, m->seats, i)
1231 HASHMAP_FOREACH(user, m->users, i)
1234 HASHMAP_FOREACH(session, m->sessions, i)
1235 session_start(session);
1237 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1238 inhibitor_start(inhibitor);
1240 HASHMAP_FOREACH(button, m->buttons, i)
1241 button_check_switches(button);
1243 manager_dispatch_idle_action(NULL, 0, m);
1248 static int manager_run(Manager *m) {
1254 r = sd_event_get_state(m->event);
1257 if (r == SD_EVENT_FINISHED)
1260 manager_gc(m, true);
1262 r = manager_dispatch_delayed(m, false);
1268 r = sd_event_run(m->event, (uint64_t) -1);
1274 int main(int argc, char *argv[]) {
1278 #if 1 /// perform extra checks for elogind startup
1279 r = elogind_startup(argc, argv);
1281 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1283 elogind_set_program_name(argv[0]);
1284 log_set_target(LOG_TARGET_AUTO);
1285 log_set_facility(LOG_AUTH);
1286 log_parse_environment();
1287 #ifdef ENABLE_DEBUG_ELOGIND
1288 log_set_max_level(LOG_DEBUG);
1289 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1290 #endif // ENABLE_DEBUG_ELOGIND
1295 #if 0 /// elogind has some extra functionality at startup, argc can be != 1
1297 log_error("This program takes no arguments.");
1303 r = mac_selinux_init();
1305 log_error_errno(r, "Could not initialize labelling: %m");
1309 /* Always create the directories people can create inotify
1310 * watches in. Note that some applications might check for the
1311 * existence of /run/systemd/seats/ to determine whether
1312 * logind is available, so please always make sure this check
1314 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1315 mkdir_label("/run/systemd/seats", 0755);
1316 mkdir_label("/run/systemd/users", 0755);
1317 mkdir_label("/run/systemd/sessions", 0755);
1319 r = mkdir_label("/run/systemd", 0755);
1320 if ( (r < 0) && (-EEXIST != r) )
1321 return log_error_errno(r, "Failed to create /run/systemd : %m");
1322 r = mkdir_label("/run/systemd/seats", 0755);
1323 if ( r < 0 && (-EEXIST != r) )
1324 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1325 r = mkdir_label("/run/systemd/users", 0755);
1326 if ( r < 0 && (-EEXIST != r) )
1327 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1328 r = mkdir_label("/run/systemd/sessions", 0755);
1329 if ( r < 0 && (-EEXIST != r) )
1330 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1331 r = mkdir_label("/run/systemd/machines", 0755);
1332 if ( r < 0 && (-EEXIST != r) )
1333 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1342 manager_parse_config_file(m);
1344 #if 1 /// elogind needs an Add-On for sleep configuration
1345 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_cached());
1357 "STATUS=Processing requests...");
1361 log_debug("elogind stopped as pid "PID_FMT, getpid_cached());
1366 "STATUS=Shutting down...");
1370 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;