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"
43 //#include "process-util.h"
44 #include "selinux-util.h"
45 #include "signal-util.h"
47 #include "udev-util.h"
48 /// Additional includes needed by elogind
49 #include "cgroup.h" // From src/core/
52 #include "musl_missing.h"
53 #include "process-util.h"
54 #include "cgroup-util.h"
56 static void manager_free(Manager *m);
58 static void manager_reset_config(Manager *m) {
59 #if 0 /// elogind does not support autospawning of vts
64 m->inhibit_delay_max = 5 * USEC_PER_SEC;
65 m->handle_power_key = HANDLE_POWEROFF;
66 m->handle_suspend_key = HANDLE_SUSPEND;
67 m->handle_hibernate_key = HANDLE_HIBERNATE;
68 m->handle_lid_switch = HANDLE_SUSPEND;
69 m->handle_lid_switch_docked = HANDLE_IGNORE;
70 m->power_key_ignore_inhibited = false;
71 m->suspend_key_ignore_inhibited = false;
72 m->hibernate_key_ignore_inhibited = false;
73 m->lid_switch_ignore_inhibited = true;
75 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
77 m->idle_action_usec = 30 * USEC_PER_MINUTE;
78 m->idle_action = HANDLE_IGNORE;
80 m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */
81 m->user_tasks_max = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); /* 33% */
82 m->sessions_max = 8192;
83 m->inhibitors_max = 8192;
85 m->kill_user_processes = KILL_USER_PROCESSES;
87 m->kill_only_users = strv_free(m->kill_only_users);
88 m->kill_exclude_users = strv_free(m->kill_exclude_users);
91 static Manager *manager_new(void) {
99 m->console_active_fd = -1;
100 #if 0 /// UNNEEDED by elogind
101 m->reserve_vt_fd = -1;
104 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
106 m->devices = hashmap_new(&string_hash_ops);
107 m->seats = hashmap_new(&string_hash_ops);
108 m->sessions = hashmap_new(&string_hash_ops);
109 m->users = hashmap_new(NULL);
110 m->inhibitors = hashmap_new(&string_hash_ops);
111 m->buttons = hashmap_new(&string_hash_ops);
113 m->user_units = hashmap_new(&string_hash_ops);
114 m->session_units = hashmap_new(&string_hash_ops);
116 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
119 #if 1 /// elogind needs some more data
120 r = elogind_manager_new(m);
124 m->udev = udev_new();
128 r = sd_event_default(&m->event);
132 sd_event_set_watchdog(m->event, true);
134 manager_reset_config(m);
143 static void manager_free(Manager *m) {
154 while ((session = hashmap_first(m->sessions)))
155 session_free(session);
157 while ((u = hashmap_first(m->users)))
160 while ((d = hashmap_first(m->devices)))
163 while ((s = hashmap_first(m->seats)))
166 while ((i = hashmap_first(m->inhibitors)))
169 while ((b = hashmap_first(m->buttons)))
172 hashmap_free(m->devices);
173 hashmap_free(m->seats);
174 hashmap_free(m->sessions);
175 hashmap_free(m->users);
176 hashmap_free(m->inhibitors);
177 hashmap_free(m->buttons);
179 hashmap_free(m->user_units);
180 hashmap_free(m->session_units);
182 sd_event_source_unref(m->idle_action_event_source);
183 sd_event_source_unref(m->inhibit_timeout_source);
184 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
185 sd_event_source_unref(m->nologin_timeout_source);
186 sd_event_source_unref(m->wall_message_timeout_source);
188 sd_event_source_unref(m->console_active_event_source);
189 sd_event_source_unref(m->udev_seat_event_source);
190 sd_event_source_unref(m->udev_device_event_source);
191 sd_event_source_unref(m->udev_vcsa_event_source);
192 sd_event_source_unref(m->udev_button_event_source);
193 sd_event_source_unref(m->lid_switch_ignore_event_source);
195 safe_close(m->console_active_fd);
197 udev_monitor_unref(m->udev_seat_monitor);
198 udev_monitor_unref(m->udev_device_monitor);
199 udev_monitor_unref(m->udev_vcsa_monitor);
200 udev_monitor_unref(m->udev_button_monitor);
204 if (m->unlink_nologin)
205 (void) unlink("/run/nologin");
207 bus_verify_polkit_async_registry_free(m->polkit_registry);
209 sd_bus_unref(m->bus);
210 sd_event_unref(m->event);
212 #if 0 /// elogind does not support autospawning of vts
213 safe_close(m->reserve_vt_fd);
215 #if 1 /// elogind has to free its own data
216 elogind_manager_free(m);
219 strv_free(m->kill_only_users);
220 strv_free(m->kill_exclude_users);
222 free(m->scheduled_shutdown_type);
223 free(m->scheduled_shutdown_tty);
224 free(m->wall_message);
225 #if 0 /// UNNEEDED by elogind
231 static int manager_enumerate_devices(Manager *m) {
232 struct udev_list_entry *item = NULL, *first = NULL;
233 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
238 /* Loads devices from udev and creates seats for them as
241 e = udev_enumerate_new(m->udev);
245 r = udev_enumerate_add_match_tag(e, "master-of-seat");
249 r = udev_enumerate_add_match_is_initialized(e);
253 r = udev_enumerate_scan_devices(e);
257 first = udev_enumerate_get_list_entry(e);
258 udev_list_entry_foreach(item, first) {
259 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
262 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
266 k = manager_process_seat_device(m, d);
274 static int manager_enumerate_buttons(Manager *m) {
275 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
276 struct udev_list_entry *item = NULL, *first = NULL;
281 /* Loads buttons from udev */
283 if (m->handle_power_key == HANDLE_IGNORE &&
284 m->handle_suspend_key == HANDLE_IGNORE &&
285 m->handle_hibernate_key == HANDLE_IGNORE &&
286 m->handle_lid_switch == HANDLE_IGNORE &&
287 m->handle_lid_switch_docked == HANDLE_IGNORE)
290 e = udev_enumerate_new(m->udev);
294 r = udev_enumerate_add_match_subsystem(e, "input");
298 r = udev_enumerate_add_match_tag(e, "power-switch");
302 r = udev_enumerate_add_match_is_initialized(e);
306 r = udev_enumerate_scan_devices(e);
310 first = udev_enumerate_get_list_entry(e);
311 udev_list_entry_foreach(item, first) {
312 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
315 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
319 k = manager_process_button_device(m, d);
327 static int manager_enumerate_seats(Manager *m) {
328 _cleanup_closedir_ DIR *d = NULL;
334 /* This loads data about seats stored on disk, but does not
335 * actually create any seats. Removes data of seats that no
338 d = opendir("/run/systemd/seats");
343 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
346 FOREACH_DIRENT(de, d, return -errno) {
350 if (!dirent_is_file(de))
353 s = hashmap_get(m->seats, de->d_name);
355 unlinkat(dirfd(d), de->d_name, 0);
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 sd = hashmap_get(s->devices, &st.st_rdev);
485 /* Weird we got an fd for a session device which wasn't
486 * recorded in the session state file... */
487 log_warning("Got fd for missing session device [%u:%u] in session %s",
488 major(st.st_rdev), minor(st.st_rdev), s->id);
493 log_debug("Attaching fd to session device [%u:%u] for session %s",
494 major(st.st_rdev), minor(st.st_rdev), s->id);
496 session_device_attach_fd(sd, fd, s->was_active);
502 static int manager_enumerate_sessions(Manager *m) {
503 _cleanup_closedir_ DIR *d = NULL;
509 /* Read in session data stored on disk */
510 d = opendir("/run/systemd/sessions");
515 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
518 FOREACH_DIRENT(de, d, return -errno) {
521 if (!dirent_is_file(de))
524 if (!session_id_valid(de->d_name)) {
525 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
530 k = manager_add_session(m, de->d_name, &s);
532 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
537 session_add_to_gc_queue(s);
544 /* We might be restarted and PID1 could have sent us back the
545 * session device fds we previously saved. */
546 k = manager_attach_fds(m);
548 log_warning_errno(k, "Failed to reattach session device fds: %m");
553 static int manager_enumerate_inhibitors(Manager *m) {
554 _cleanup_closedir_ DIR *d = NULL;
560 d = opendir("/run/systemd/inhibit");
565 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
568 FOREACH_DIRENT(de, d, return -errno) {
572 if (!dirent_is_file(de))
575 k = manager_add_inhibitor(m, de->d_name, &i);
577 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
582 k = inhibitor_load(i);
590 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
591 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
592 Manager *m = userdata;
596 d = udev_monitor_receive_device(m->udev_seat_monitor);
600 manager_process_seat_device(m, d);
604 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
605 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
606 Manager *m = userdata;
610 d = udev_monitor_receive_device(m->udev_device_monitor);
614 manager_process_seat_device(m, d);
618 #if 0 /// UNNEEDED by elogind
619 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
620 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
621 Manager *m = userdata;
626 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
630 name = udev_device_get_sysname(d);
632 /* Whenever a VCSA device is removed try to reallocate our
633 * VTs, to make sure our auto VTs never go away. */
635 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
636 seat_preallocate_vts(m->seat0);
642 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
643 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
644 Manager *m = userdata;
648 d = udev_monitor_receive_device(m->udev_button_monitor);
652 manager_process_button_device(m, d);
656 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
657 Manager *m = userdata;
661 assert(m->console_active_fd == fd);
663 seat_read_active_vt(m->seat0);
667 #if 0 /// UNNEEDED by elogind
668 static int manager_reserve_vt(Manager *m) {
669 _cleanup_free_ char *p = NULL;
673 if (m->reserve_vt <= 0)
676 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
679 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
680 if (m->reserve_vt_fd < 0) {
682 /* Don't complain on VT-less systems */
684 log_warning_errno(errno, "Failed to pin reserved VT: %m");
692 static int manager_connect_bus(Manager *m) {
698 r = sd_bus_default_system(&m->bus);
700 return log_error_errno(r, "Failed to connect to system bus: %m");
702 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
704 return log_error_errno(r, "Failed to add manager object vtable: %m");
706 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
708 return log_error_errno(r, "Failed to add seat object vtable: %m");
710 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
712 return log_error_errno(r, "Failed to add seat enumerator: %m");
714 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
716 return log_error_errno(r, "Failed to add session object vtable: %m");
718 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
720 return log_error_errno(r, "Failed to add session enumerator: %m");
722 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
724 return log_error_errno(r, "Failed to add user object vtable: %m");
726 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
728 return log_error_errno(r, "Failed to add user enumerator: %m");
730 #if 0 /// elogind does not support systemd as PID 1
731 r = sd_bus_match_signal_async(
734 "org.freedesktop.systemd1",
735 "/org/freedesktop/systemd1",
736 "org.freedesktop.systemd1.Manager",
738 match_job_removed, NULL, m);
740 return log_error_errno(r, "Failed to request match for JobRemoved: %m");
742 r = sd_bus_match_signal_async(
745 "org.freedesktop.systemd1",
746 "/org/freedesktop/systemd1",
747 "org.freedesktop.systemd1.Manager",
749 match_unit_removed, NULL, m);
751 return log_error_errno(r, "Failed to request match for UnitRemoved: %m");
753 r = sd_bus_match_signal_async(
756 "org.freedesktop.systemd1",
758 "org.freedesktop.DBus.Properties",
760 match_properties_changed, NULL, m);
762 return log_error_errno(r, "Failed to request match for PropertiesChanged: %m");
764 r = sd_bus_match_signal_async(
767 "org.freedesktop.systemd1",
768 "/org/freedesktop/systemd1",
769 "org.freedesktop.systemd1.Manager",
771 match_reloading, NULL, m);
773 return log_error_errno(r, "Failed to request match for Reloading: %m");
775 r = sd_bus_call_method_async(
778 "org.freedesktop.systemd1",
779 "/org/freedesktop/systemd1",
780 "org.freedesktop.systemd1.Manager",
786 return log_error_errno(r, "Failed to enable subscription: %m");
788 r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.login1", 0, NULL, NULL);
790 return log_error_errno(r, "Failed to request name: %m");
792 r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
794 return log_error_errno(r, "Failed to attach bus to event loop: %m");
796 #if 0 /// elogind has to setup its release agent
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,
1119 const char* logind_conf = getenv("ELOGIND_CONF_FILE");
1124 logind_conf = PKGSYSCONFDIR "/logind.conf";
1126 return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0",
1127 config_item_perf_lookup, logind_gperf_lookup,
1129 CONFIG_PARSE_WARN, m);
1132 static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1133 Manager *m = userdata;
1136 manager_reset_config(m);
1137 r = manager_parse_config_file(m);
1139 log_warning_errno(r, "Failed to parse config file, using defaults: %m");
1141 log_info("Config file reloaded.");
1143 #if 1 /// elogind needs an Add-On for sleep configuration
1144 elogind_manager_reset_config(m);
1149 static int manager_startup(Manager *m) {
1155 Inhibitor *inhibitor;
1160 assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0);
1162 r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m);
1164 return log_error_errno(r, "Failed to register SIGHUP handler: %m");
1166 #if 1 /// elogind needs some extra preparations before connecting...
1167 elogind_manager_startup(m);
1169 /* Connect to console */
1170 r = manager_connect_console(m);
1174 /* Connect to udev */
1175 r = manager_connect_udev(m);
1177 return log_error_errno(r, "Failed to create udev watchers: %m");
1179 /* Connect to the bus */
1180 r = manager_connect_bus(m);
1184 /* Instantiate magic seat 0 */
1185 r = manager_add_seat(m, "seat0", &m->seat0);
1187 return log_error_errno(r, "Failed to add seat0: %m");
1189 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1191 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1193 /* Deserialize state */
1194 r = manager_enumerate_devices(m);
1196 log_warning_errno(r, "Device enumeration failed: %m");
1198 r = manager_enumerate_seats(m);
1200 log_warning_errno(r, "Seat enumeration failed: %m");
1202 r = manager_enumerate_users(m);
1204 log_warning_errno(r, "User enumeration failed: %m");
1206 r = manager_enumerate_sessions(m);
1208 log_warning_errno(r, "Session enumeration failed: %m");
1210 r = manager_enumerate_inhibitors(m);
1212 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1214 r = manager_enumerate_buttons(m);
1216 log_warning_errno(r, "Button enumeration failed: %m");
1218 /* Remove stale objects before we start them */
1219 manager_gc(m, false);
1221 /* Reserve the special reserved VT */
1222 #if 0 /// elogind does not support autospawning of vts
1223 manager_reserve_vt(m);
1226 /* And start everything */
1227 HASHMAP_FOREACH(seat, m->seats, i)
1230 HASHMAP_FOREACH(user, m->users, i)
1233 HASHMAP_FOREACH(session, m->sessions, i)
1234 session_start(session);
1236 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1237 inhibitor_start(inhibitor);
1239 HASHMAP_FOREACH(button, m->buttons, i)
1240 button_check_switches(button);
1242 manager_dispatch_idle_action(NULL, 0, m);
1247 static int manager_run(Manager *m) {
1253 r = sd_event_get_state(m->event);
1256 if (r == SD_EVENT_FINISHED)
1259 manager_gc(m, true);
1261 r = manager_dispatch_delayed(m, false);
1267 r = sd_event_run(m->event, (uint64_t) -1);
1273 int main(int argc, char *argv[]) {
1277 #if 1 /// perform extra checks for elogind startup
1278 r = elogind_startup(argc, argv);
1280 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1282 elogind_set_program_name(argv[0]);
1283 log_set_target(LOG_TARGET_AUTO);
1284 log_set_facility(LOG_AUTH);
1285 log_parse_environment();
1286 #ifdef ENABLE_DEBUG_ELOGIND
1287 log_set_max_level(LOG_DEBUG);
1288 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1289 #endif // ENABLE_DEBUG_ELOGIND
1294 #if 0 /// elogind has some extra functionality at startup, argc can be != 1
1296 log_error("This program takes no arguments.");
1302 r = mac_selinux_init();
1304 log_error_errno(r, "Could not initialize labelling: %m");
1308 /* Always create the directories people can create inotify
1309 * watches in. Note that some applications might check for the
1310 * existence of /run/systemd/seats/ to determine whether
1311 * logind is available, so please always make sure this check
1313 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1314 mkdir_label("/run/systemd/seats", 0755);
1315 mkdir_label("/run/systemd/users", 0755);
1316 mkdir_label("/run/systemd/sessions", 0755);
1318 r = mkdir_label("/run/systemd", 0755);
1319 if ( (r < 0) && (-EEXIST != r) )
1320 return log_error_errno(r, "Failed to create /run/systemd : %m");
1321 r = mkdir_label("/run/systemd/seats", 0755);
1322 if ( r < 0 && (-EEXIST != r) )
1323 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1324 r = mkdir_label("/run/systemd/users", 0755);
1325 if ( r < 0 && (-EEXIST != r) )
1326 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1327 r = mkdir_label("/run/systemd/sessions", 0755);
1328 if ( r < 0 && (-EEXIST != r) )
1329 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1330 r = mkdir_label("/run/systemd/machines", 0755);
1331 if ( r < 0 && (-EEXIST != r) )
1332 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1341 manager_parse_config_file(m);
1343 #if 1 /// elogind needs an Add-On for sleep configuration
1344 elogind_manager_reset_config(m);
1346 r = manager_startup(m);
1348 log_error_errno(r, "Failed to fully start up daemon: %m");
1352 log_debug("elogind running as pid "PID_FMT, getpid_cached());
1356 "STATUS=Processing requests...");
1360 log_debug("elogind stopped as pid "PID_FMT, getpid_cached());
1365 "STATUS=Shutting down...");
1369 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;