2 This file is part of systemd.
4 Copyright 2011 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #if 0 /// elogind needs the systems udev header
30 #include "sd-daemon.h"
32 #include "alloc-util.h"
33 #include "bus-error.h"
35 #include "conf-parser.h"
37 #include "dirent-util.h"
39 #include "format-util.h"
41 #include "selinux-util.h"
42 #include "signal-util.h"
44 #include "udev-util.h"
45 /// Additional includes needed by elogind
46 #include "cgroup.h" // From src/core/
49 #include "musl_missing.h"
50 #include "process-util.h"
51 #include "cgroup-util.h"
53 static void manager_free(Manager *m);
55 static void manager_reset_config(Manager *m) {
56 #if 0 /// elogind does not support autospawning of vts
61 m->inhibit_delay_max = 5 * USEC_PER_SEC;
62 m->handle_power_key = HANDLE_POWEROFF;
63 m->handle_suspend_key = HANDLE_SUSPEND;
64 m->handle_hibernate_key = HANDLE_HIBERNATE;
65 m->handle_lid_switch = HANDLE_SUSPEND;
66 m->handle_lid_switch_docked = HANDLE_IGNORE;
67 m->power_key_ignore_inhibited = false;
68 m->suspend_key_ignore_inhibited = false;
69 m->hibernate_key_ignore_inhibited = false;
70 m->lid_switch_ignore_inhibited = true;
72 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
74 m->idle_action_usec = 30 * USEC_PER_MINUTE;
75 m->idle_action = HANDLE_IGNORE;
77 m->runtime_dir_size = physical_memory_scale(10U, 100U); /* 10% */
78 m->user_tasks_max = system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE, 100U); /* 33% */
79 m->sessions_max = 8192;
80 m->inhibitors_max = 8192;
82 m->kill_user_processes = KILL_USER_PROCESSES;
84 m->kill_only_users = strv_free(m->kill_only_users);
85 m->kill_exclude_users = strv_free(m->kill_exclude_users);
88 static Manager *manager_new(void) {
96 m->console_active_fd = -1;
97 #if 0 /// UNNEEDED by elogind
98 m->reserve_vt_fd = -1;
101 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
103 m->devices = hashmap_new(&string_hash_ops);
104 m->seats = hashmap_new(&string_hash_ops);
105 m->sessions = hashmap_new(&string_hash_ops);
106 m->users = hashmap_new(NULL);
107 m->inhibitors = hashmap_new(&string_hash_ops);
108 m->buttons = hashmap_new(&string_hash_ops);
110 m->user_units = hashmap_new(&string_hash_ops);
111 m->session_units = hashmap_new(&string_hash_ops);
113 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
116 #if 1 /// elogind needs some more data
117 r = elogind_manager_new(m);
121 m->udev = udev_new();
125 r = sd_event_default(&m->event);
129 sd_event_set_watchdog(m->event, true);
131 manager_reset_config(m);
140 static void manager_free(Manager *m) {
151 while ((session = hashmap_first(m->sessions)))
152 session_free(session);
154 while ((u = hashmap_first(m->users)))
157 while ((d = hashmap_first(m->devices)))
160 while ((s = hashmap_first(m->seats)))
163 while ((i = hashmap_first(m->inhibitors)))
166 while ((b = hashmap_first(m->buttons)))
169 hashmap_free(m->devices);
170 hashmap_free(m->seats);
171 hashmap_free(m->sessions);
172 hashmap_free(m->users);
173 hashmap_free(m->inhibitors);
174 hashmap_free(m->buttons);
176 hashmap_free(m->user_units);
177 hashmap_free(m->session_units);
179 sd_event_source_unref(m->idle_action_event_source);
180 sd_event_source_unref(m->inhibit_timeout_source);
181 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
182 sd_event_source_unref(m->nologin_timeout_source);
183 sd_event_source_unref(m->wall_message_timeout_source);
185 sd_event_source_unref(m->console_active_event_source);
186 sd_event_source_unref(m->udev_seat_event_source);
187 sd_event_source_unref(m->udev_device_event_source);
188 sd_event_source_unref(m->udev_vcsa_event_source);
189 sd_event_source_unref(m->udev_button_event_source);
190 sd_event_source_unref(m->lid_switch_ignore_event_source);
192 safe_close(m->console_active_fd);
194 udev_monitor_unref(m->udev_seat_monitor);
195 udev_monitor_unref(m->udev_device_monitor);
196 udev_monitor_unref(m->udev_vcsa_monitor);
197 udev_monitor_unref(m->udev_button_monitor);
201 if (m->unlink_nologin)
202 (void) unlink("/run/nologin");
204 bus_verify_polkit_async_registry_free(m->polkit_registry);
206 sd_bus_unref(m->bus);
207 sd_event_unref(m->event);
209 #if 0 /// elogind does not support autospawning of vts
210 safe_close(m->reserve_vt_fd);
212 #if 1 /// elogind has to free its own data
213 elogind_manager_free(m);
216 strv_free(m->kill_only_users);
217 strv_free(m->kill_exclude_users);
219 free(m->scheduled_shutdown_type);
220 free(m->scheduled_shutdown_tty);
221 free(m->wall_message);
222 #if 0 /// UNNEEDED by elogind
228 static int manager_enumerate_devices(Manager *m) {
229 struct udev_list_entry *item = NULL, *first = NULL;
230 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
235 /* Loads devices from udev and creates seats for them as
238 e = udev_enumerate_new(m->udev);
242 r = udev_enumerate_add_match_tag(e, "master-of-seat");
246 r = udev_enumerate_add_match_is_initialized(e);
250 r = udev_enumerate_scan_devices(e);
254 first = udev_enumerate_get_list_entry(e);
255 udev_list_entry_foreach(item, first) {
256 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
259 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
263 k = manager_process_seat_device(m, d);
271 static int manager_enumerate_buttons(Manager *m) {
272 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
273 struct udev_list_entry *item = NULL, *first = NULL;
278 /* Loads buttons from udev */
280 if (m->handle_power_key == HANDLE_IGNORE &&
281 m->handle_suspend_key == HANDLE_IGNORE &&
282 m->handle_hibernate_key == HANDLE_IGNORE &&
283 m->handle_lid_switch == HANDLE_IGNORE &&
284 m->handle_lid_switch_docked == HANDLE_IGNORE)
287 e = udev_enumerate_new(m->udev);
291 r = udev_enumerate_add_match_subsystem(e, "input");
295 r = udev_enumerate_add_match_tag(e, "power-switch");
299 r = udev_enumerate_add_match_is_initialized(e);
303 r = udev_enumerate_scan_devices(e);
307 first = udev_enumerate_get_list_entry(e);
308 udev_list_entry_foreach(item, first) {
309 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
312 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
316 k = manager_process_button_device(m, d);
324 static int manager_enumerate_seats(Manager *m) {
325 _cleanup_closedir_ DIR *d = NULL;
331 /* This loads data about seats stored on disk, but does not
332 * actually create any seats. Removes data of seats that no
335 d = opendir("/run/systemd/seats");
340 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
343 FOREACH_DIRENT(de, d, return -errno) {
347 if (!dirent_is_file(de))
350 s = hashmap_get(m->seats, de->d_name);
352 unlinkat(dirfd(d), de->d_name, 0);
364 static int manager_enumerate_linger_users(Manager *m) {
365 _cleanup_closedir_ DIR *d = NULL;
371 d = opendir("/var/lib/systemd/linger");
376 return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
379 FOREACH_DIRENT(de, d, return -errno) {
382 if (!dirent_is_file(de))
385 k = manager_add_user_by_name(m, de->d_name, NULL);
387 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
395 static int manager_enumerate_users(Manager *m) {
396 _cleanup_closedir_ DIR *d = NULL;
402 /* Add lingering users */
403 r = manager_enumerate_linger_users(m);
405 /* Read in user data stored on disk */
406 d = opendir("/run/systemd/users");
411 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
414 FOREACH_DIRENT(de, d, return -errno) {
417 if (!dirent_is_file(de))
420 k = manager_add_user_by_name(m, de->d_name, &u);
422 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
428 user_add_to_gc_queue(u);
438 static int manager_attach_fds(Manager *m) {
439 _cleanup_strv_free_ char **fdnames = NULL;
442 /* Upon restart, PID1 will send us back all fds of session devices
443 * that we previously opened. Each file descriptor is associated
444 * with a given session. The session ids are passed through FDNAMES. */
446 n = sd_listen_fds_with_names(true, &fdnames);
450 for (i = 0; i < n; i++) {
456 fd = SD_LISTEN_FDS_START + i;
458 id = startswith(fdnames[i], "session-");
462 s = hashmap_get(m->sessions, id);
464 /* If the session doesn't exist anymore, the associated session
465 * device attached to this fd doesn't either. Let's simply close
467 log_debug("Failed to attach fd for unknown session: %s", id);
472 if (fstat(fd, &st) < 0) {
473 /* The device is allowed to go away at a random point, in which
474 * case fstat failing is expected. */
475 log_debug_errno(errno, "Failed to stat device fd for session %s: %m", id);
480 sd = hashmap_get(s->devices, &st.st_rdev);
482 /* Weird we got an fd for a session device which wasn't
483 * recorded in the session state file... */
484 log_warning("Got fd for missing session device [%u:%u] in session %s",
485 major(st.st_rdev), minor(st.st_rdev), s->id);
490 log_debug("Attaching fd to session device [%u:%u] for session %s",
491 major(st.st_rdev), minor(st.st_rdev), s->id);
493 session_device_attach_fd(sd, fd, s->was_active);
499 static int manager_enumerate_sessions(Manager *m) {
500 _cleanup_closedir_ DIR *d = NULL;
506 /* Read in session data stored on disk */
507 d = opendir("/run/systemd/sessions");
512 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
515 FOREACH_DIRENT(de, d, return -errno) {
518 if (!dirent_is_file(de))
521 if (!session_id_valid(de->d_name)) {
522 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
527 k = manager_add_session(m, de->d_name, &s);
529 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
534 session_add_to_gc_queue(s);
541 /* We might be restarted and PID1 could have sent us back the
542 * session device fds we previously saved. */
543 k = manager_attach_fds(m);
545 log_warning_errno(k, "Failed to reattach session device fds: %m");
550 static int manager_enumerate_inhibitors(Manager *m) {
551 _cleanup_closedir_ DIR *d = NULL;
557 d = opendir("/run/systemd/inhibit");
562 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
565 FOREACH_DIRENT(de, d, return -errno) {
569 if (!dirent_is_file(de))
572 k = manager_add_inhibitor(m, de->d_name, &i);
574 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
579 k = inhibitor_load(i);
587 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
588 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
589 Manager *m = userdata;
593 d = udev_monitor_receive_device(m->udev_seat_monitor);
597 manager_process_seat_device(m, d);
601 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
602 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
603 Manager *m = userdata;
607 d = udev_monitor_receive_device(m->udev_device_monitor);
611 manager_process_seat_device(m, d);
615 #if 0 /// UNNEEDED by elogind
616 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
617 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
618 Manager *m = userdata;
623 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
627 name = udev_device_get_sysname(d);
629 /* Whenever a VCSA device is removed try to reallocate our
630 * VTs, to make sure our auto VTs never go away. */
632 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
633 seat_preallocate_vts(m->seat0);
639 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
640 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
641 Manager *m = userdata;
645 d = udev_monitor_receive_device(m->udev_button_monitor);
649 manager_process_button_device(m, d);
653 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
654 Manager *m = userdata;
658 assert(m->console_active_fd == fd);
660 seat_read_active_vt(m->seat0);
664 #if 0 /// UNNEEDED by elogind
665 static int manager_reserve_vt(Manager *m) {
666 _cleanup_free_ char *p = NULL;
670 if (m->reserve_vt <= 0)
673 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
676 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
677 if (m->reserve_vt_fd < 0) {
679 /* Don't complain on VT-less systems */
681 log_warning_errno(errno, "Failed to pin reserved VT: %m");
689 static int manager_connect_bus(Manager *m) {
690 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_add_match(m->bus,
732 "sender='org.freedesktop.systemd1',"
733 "interface='org.freedesktop.systemd1.Manager',"
734 "member='JobRemoved',"
735 "path='/org/freedesktop/systemd1'",
736 match_job_removed, m);
738 return log_error_errno(r, "Failed to add match for JobRemoved: %m");
740 r = sd_bus_add_match(m->bus,
743 "sender='org.freedesktop.systemd1',"
744 "interface='org.freedesktop.systemd1.Manager',"
745 "member='UnitRemoved',"
746 "path='/org/freedesktop/systemd1'",
747 match_unit_removed, m);
749 return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
751 r = sd_bus_add_match(m->bus,
754 "sender='org.freedesktop.systemd1',"
755 "interface='org.freedesktop.DBus.Properties',"
756 "member='PropertiesChanged'",
757 match_properties_changed, m);
759 return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
761 r = sd_bus_add_match(m->bus,
764 "sender='org.freedesktop.systemd1',"
765 "interface='org.freedesktop.systemd1.Manager',"
766 "member='Reloading',"
767 "path='/org/freedesktop/systemd1'",
770 return log_error_errno(r, "Failed to add match for Reloading: %m");
772 r = sd_bus_call_method(
774 "org.freedesktop.systemd1",
775 "/org/freedesktop/systemd1",
776 "org.freedesktop.systemd1.Manager",
781 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
786 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
788 return log_error_errno(r, "Failed to register 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 (m->handle_power_key != HANDLE_IGNORE ||
946 m->handle_suspend_key != HANDLE_IGNORE ||
947 m->handle_hibernate_key != HANDLE_IGNORE ||
948 m->handle_lid_switch != HANDLE_IGNORE ||
949 m->handle_lid_switch_docked != HANDLE_IGNORE) {
951 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
952 if (!m->udev_button_monitor)
955 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
959 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
963 r = udev_monitor_enable_receiving(m->udev_button_monitor);
967 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);
972 /* Don't bother watching VCSA devices, if nobody cares */
973 #if 0 /// elogind does not support autospawning of vts
974 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
976 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
977 if (!m->udev_vcsa_monitor)
980 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
984 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
988 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);
997 static void manager_gc(Manager *m, bool drop_not_started) {
1004 while ((seat = m->seat_gc_queue)) {
1005 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
1006 seat->in_gc_queue = false;
1008 if (!seat_check_gc(seat, drop_not_started)) {
1009 seat_stop(seat, false);
1014 while ((session = m->session_gc_queue)) {
1015 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1016 session->in_gc_queue = false;
1018 /* First, if we are not closing yet, initiate stopping */
1019 if (!session_check_gc(session, drop_not_started) &&
1020 session_get_state(session) != SESSION_CLOSING)
1021 session_stop(session, false);
1023 /* Normally, this should make the session referenced
1024 * again, if it doesn't then let's get rid of it
1026 if (!session_check_gc(session, drop_not_started)) {
1027 session_finalize(session);
1028 session_free(session);
1032 while ((user = m->user_gc_queue)) {
1033 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1034 user->in_gc_queue = false;
1036 /* First step: queue stop jobs */
1037 if (!user_check_gc(user, drop_not_started))
1038 user_stop(user, false);
1040 /* Second step: finalize user */
1041 if (!user_check_gc(user, drop_not_started)) {
1042 user_finalize(user);
1048 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1049 Manager *m = userdata;
1050 struct dual_timestamp since;
1056 if (m->idle_action == HANDLE_IGNORE ||
1057 m->idle_action_usec <= 0)
1060 n = now(CLOCK_MONOTONIC);
1062 r = manager_get_idle_hint(m, &since);
1064 /* Not idle. Let's check if after a timeout it might be idle then. */
1065 elapse = n + m->idle_action_usec;
1067 /* Idle! Let's see if it's time to do something, or if
1068 * we shall sleep for longer. */
1070 if (n >= since.monotonic + m->idle_action_usec &&
1071 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1072 log_info("System idle. Taking action.");
1074 manager_handle_action(m, 0, m->idle_action, false, false);
1075 m->idle_action_not_before_usec = n;
1078 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1081 if (!m->idle_action_event_source) {
1083 r = sd_event_add_time(
1085 &m->idle_action_event_source,
1087 elapse, USEC_PER_SEC*30,
1088 manager_dispatch_idle_action, m);
1090 return log_error_errno(r, "Failed to add idle event source: %m");
1092 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1094 return log_error_errno(r, "Failed to set idle event source priority: %m");
1096 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1098 return log_error_errno(r, "Failed to set idle event timer: %m");
1100 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1102 return log_error_errno(r, "Failed to enable idle event timer: %m");
1108 static int manager_parse_config_file(Manager *m) {
1109 #if 0 /// elogind parses its own config file
1112 return config_parse_many_nulstr(PKGSYSCONFDIR "/logind.conf",
1113 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1115 config_item_perf_lookup, logind_gperf_lookup,
1118 const char* logind_conf = getenv("ELOGIND_CONF_FILE");
1123 logind_conf = PKGSYSCONFDIR "/logind.conf";
1125 return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0",
1126 config_item_perf_lookup, logind_gperf_lookup,
1127 false, false, true, m);
1131 static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1132 Manager *m = userdata;
1135 manager_reset_config(m);
1136 r = manager_parse_config_file(m);
1138 log_warning_errno(r, "Failed to parse config file, using defaults: %m");
1140 log_info("Config file reloaded.");
1142 #if 1 /// elogind needs an Add-On for sleep configuration
1143 elogind_manager_reset_config(m);
1148 static int manager_startup(Manager *m) {
1154 Inhibitor *inhibitor;
1159 assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0);
1161 r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m);
1163 return log_error_errno(r, "Failed to register SIGHUP handler: %m");
1165 #if 1 /// elogind needs some extra preparations before connecting...
1166 elogind_manager_startup(m);
1168 /* Connect to console */
1169 r = manager_connect_console(m);
1173 /* Connect to udev */
1174 r = manager_connect_udev(m);
1176 return log_error_errno(r, "Failed to create udev watchers: %m");
1178 /* Connect to the bus */
1179 r = manager_connect_bus(m);
1183 /* Instantiate magic seat 0 */
1184 r = manager_add_seat(m, "seat0", &m->seat0);
1186 return log_error_errno(r, "Failed to add seat0: %m");
1188 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1190 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1192 /* Deserialize state */
1193 r = manager_enumerate_devices(m);
1195 log_warning_errno(r, "Device enumeration failed: %m");
1197 r = manager_enumerate_seats(m);
1199 log_warning_errno(r, "Seat enumeration failed: %m");
1201 r = manager_enumerate_users(m);
1203 log_warning_errno(r, "User enumeration failed: %m");
1205 r = manager_enumerate_sessions(m);
1207 log_warning_errno(r, "Session enumeration failed: %m");
1209 r = manager_enumerate_inhibitors(m);
1211 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1213 r = manager_enumerate_buttons(m);
1215 log_warning_errno(r, "Button enumeration failed: %m");
1217 /* Remove stale objects before we start them */
1218 manager_gc(m, false);
1220 /* Reserve the special reserved VT */
1221 #if 0 /// elogind does not support autospawning of vts
1222 manager_reserve_vt(m);
1225 /* And start everything */
1226 HASHMAP_FOREACH(seat, m->seats, i)
1229 HASHMAP_FOREACH(user, m->users, i)
1232 HASHMAP_FOREACH(session, m->sessions, i)
1233 session_start(session);
1235 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1236 inhibitor_start(inhibitor);
1238 HASHMAP_FOREACH(button, m->buttons, i)
1239 button_check_switches(button);
1241 manager_dispatch_idle_action(NULL, 0, m);
1246 static int manager_run(Manager *m) {
1252 r = sd_event_get_state(m->event);
1255 if (r == SD_EVENT_FINISHED)
1258 manager_gc(m, true);
1260 r = manager_dispatch_delayed(m, false);
1266 r = sd_event_run(m->event, (uint64_t) -1);
1272 int main(int argc, char *argv[]) {
1276 #if 1 /// perform extra checks for elogind startup
1277 r = elogind_startup(argc, argv);
1279 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
1281 elogind_set_program_name(argv[0]);
1282 log_set_target(LOG_TARGET_AUTO);
1283 log_set_facility(LOG_AUTH);
1284 log_parse_environment();
1285 #ifdef ENABLE_DEBUG_ELOGIND
1286 log_set_max_level(LOG_DEBUG);
1287 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1288 #endif // ENABLE_DEBUG_ELOGIND
1293 #if 0 /// elogind has some extra functionality at startup, argc can be != 1
1295 log_error("This program takes no arguments.");
1301 r = mac_selinux_init();
1303 log_error_errno(r, "Could not initialize labelling: %m");
1307 /* Always create the directories people can create inotify
1308 * watches in. Note that some applications might check for the
1309 * existence of /run/systemd/seats/ to determine whether
1310 * logind is available, so please always make sure this check
1312 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1313 mkdir_label("/run/systemd/seats", 0755);
1314 mkdir_label("/run/systemd/users", 0755);
1315 mkdir_label("/run/systemd/sessions", 0755);
1317 r = mkdir_label("/run/systemd", 0755);
1318 if ( (r < 0) && (-EEXIST != r) )
1319 return log_error_errno(r, "Failed to create /run/systemd : %m");
1320 r = mkdir_label("/run/systemd/seats", 0755);
1321 if ( r < 0 && (-EEXIST != r) )
1322 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1323 r = mkdir_label("/run/systemd/users", 0755);
1324 if ( r < 0 && (-EEXIST != r) )
1325 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1326 r = mkdir_label("/run/systemd/sessions", 0755);
1327 if ( r < 0 && (-EEXIST != r) )
1328 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1329 r = mkdir_label("/run/systemd/machines", 0755);
1330 if ( r < 0 && (-EEXIST != r) )
1331 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1340 manager_parse_config_file(m);
1342 #if 1 /// elogind needs an Add-On for sleep configuration
1343 elogind_manager_reset_config(m);
1345 r = manager_startup(m);
1347 log_error_errno(r, "Failed to fully start up daemon: %m");
1351 log_debug("elogind running as pid "PID_FMT, getpid_cached());
1355 "STATUS=Processing requests...");
1359 log_debug("elogind stopped as pid "PID_FMT, getpid_cached());
1364 "STATUS=Shutting down...");
1368 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;