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 "formats-util.h"
41 #include "selinux-util.h"
42 #include "signal-util.h"
44 #include "udev-util.h"
46 /// additional includes elogind needs
47 #include "cgroup.h" // From src/core/
49 #include "mount-setup.h" // From src/core
50 #include "musl_missing.h"
52 static void manager_free(Manager *m);
54 static void manager_reset_config(Manager *m) {
56 #ifdef ENABLE_DEBUG_ELOGIND
58 #endif // ENABLE_DEBUG_ELOGIND
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_docked = HANDLE_IGNORE;
71 m->power_key_ignore_inhibited = false;
72 m->suspend_key_ignore_inhibited = false;
73 m->hibernate_key_ignore_inhibited = false;
74 m->lid_switch_ignore_inhibited = true;
76 m->holdoff_timeout_usec = 30 * USEC_PER_SEC;
78 m->idle_action_usec = 30 * USEC_PER_MINUTE;
79 m->idle_action = HANDLE_IGNORE;
81 m->runtime_dir_size = PAGE_ALIGN((size_t) (physical_memory() / 10)); /* 10% */
82 m->user_tasks_max = 12288;
83 m->sessions_max = 8192;
84 m->inhibitors_max = 8192;
86 m->kill_user_processes = KILL_USER_PROCESSES;
88 m->kill_only_users = strv_free(m->kill_only_users);
89 m->kill_exclude_users = strv_free(m->kill_exclude_users);
91 /* Set default Sleep config if not already set by logind.conf */
92 if (!m->suspend_state)
93 m->suspend_state = strv_new("mem", "standby", "freeze", NULL);
94 if (!m->hibernate_mode)
95 m->hibernate_mode = strv_new("platform", "shutdown", NULL);
96 if (!m->hibernate_state)
97 m->hibernate_state = strv_new("disk", NULL);
98 if (!m->hybrid_sleep_mode)
99 m->hybrid_sleep_mode = strv_new("suspend", "platform", "shutdown", NULL);
100 if (!m->hybrid_sleep_state)
101 m->hybrid_sleep_state = strv_new("disk", NULL);
103 #ifdef ENABLE_DEBUG_ELOGIND
105 while (m->suspend_mode && m->suspend_mode[++dbg_cnt])
106 log_debug_elogind("suspend_mode[%d] = %s",
107 dbg_cnt, m->suspend_mode[dbg_cnt]);
109 while (m->suspend_state[++dbg_cnt])
110 log_debug_elogind("suspend_state[%d] = %s",
111 dbg_cnt, m->suspend_state[dbg_cnt]);
113 while (m->hibernate_mode[++dbg_cnt])
114 log_debug_elogind("hibernate_mode[%d] = %s",
115 dbg_cnt, m->hibernate_mode[dbg_cnt]);
117 while (m->hibernate_state[++dbg_cnt])
118 log_debug_elogind("hibernate_state[%d] = %s",
119 dbg_cnt, m->hibernate_state[dbg_cnt]);
121 while (m->hybrid_sleep_mode[++dbg_cnt])
122 log_debug_elogind("hybrid_sleep_mode[%d] = %s",
123 dbg_cnt, m->hybrid_sleep_mode[dbg_cnt]);
125 while (m->hybrid_sleep_state[++dbg_cnt])
126 log_debug_elogind("hybrid_sleep_state[%d] = %s",
127 dbg_cnt, m->hybrid_sleep_state[dbg_cnt]);
128 #endif // ENABLE_DEBUG_ELOGIND
131 static Manager *manager_new(void) {
135 m = new0(Manager, 1);
139 m->pin_cgroupfs_fd = -1;
140 m->console_active_fd = -1;
141 #if 0 /// UNNEEDED by elogind
142 m->reserve_vt_fd = -1;
145 m->idle_action_not_before_usec = now(CLOCK_MONOTONIC);
147 m->devices = hashmap_new(&string_hash_ops);
148 m->seats = hashmap_new(&string_hash_ops);
149 m->sessions = hashmap_new(&string_hash_ops);
150 m->users = hashmap_new(NULL);
151 m->inhibitors = hashmap_new(&string_hash_ops);
152 m->buttons = hashmap_new(&string_hash_ops);
154 m->user_units = hashmap_new(&string_hash_ops);
155 m->session_units = hashmap_new(&string_hash_ops);
159 if (!m->devices || !m->seats || !m->sessions || !m->users || !m->inhibitors || !m->buttons || !m->user_units || !m->session_units)
162 /* If elogind should be its own controller, mount its cgroup */
163 if (streq(SYSTEMD_CGROUP_CONTROLLER, "name=elogind")) {
164 r = mount_setup(true);
170 r = manager_setup_cgroup(m);
174 m->suspend_mode = NULL;
175 m->suspend_state = NULL;
176 m->hibernate_mode = NULL;
177 m->hibernate_state = NULL;
178 m->hybrid_sleep_mode = NULL;
179 m->hybrid_sleep_state = NULL;
181 m->udev = udev_new();
185 r = sd_event_default(&m->event);
189 sd_event_set_watchdog(m->event, true);
191 manager_reset_config(m);
200 static void manager_free(Manager *m) {
210 while ((session = hashmap_first(m->sessions)))
211 session_free(session);
213 while ((u = hashmap_first(m->users)))
216 while ((d = hashmap_first(m->devices)))
219 while ((s = hashmap_first(m->seats)))
222 while ((i = hashmap_first(m->inhibitors)))
225 while ((b = hashmap_first(m->buttons)))
228 hashmap_free(m->devices);
229 hashmap_free(m->seats);
230 hashmap_free(m->sessions);
231 hashmap_free(m->users);
232 hashmap_free(m->inhibitors);
233 hashmap_free(m->buttons);
235 hashmap_free(m->user_units);
236 hashmap_free(m->session_units);
238 sd_event_source_unref(m->idle_action_event_source);
239 sd_event_source_unref(m->inhibit_timeout_source);
240 sd_event_source_unref(m->scheduled_shutdown_timeout_source);
241 sd_event_source_unref(m->nologin_timeout_source);
242 sd_event_source_unref(m->wall_message_timeout_source);
244 sd_event_source_unref(m->console_active_event_source);
245 sd_event_source_unref(m->udev_seat_event_source);
246 sd_event_source_unref(m->udev_device_event_source);
247 sd_event_source_unref(m->udev_vcsa_event_source);
248 sd_event_source_unref(m->udev_button_event_source);
249 sd_event_source_unref(m->lid_switch_ignore_event_source);
251 safe_close(m->console_active_fd);
253 udev_monitor_unref(m->udev_seat_monitor);
254 udev_monitor_unref(m->udev_device_monitor);
255 udev_monitor_unref(m->udev_vcsa_monitor);
256 udev_monitor_unref(m->udev_button_monitor);
260 if (m->unlink_nologin)
261 (void) unlink("/run/nologin");
263 bus_verify_polkit_async_registry_free(m->polkit_registry);
265 sd_bus_unref(m->bus);
266 sd_event_unref(m->event);
268 #if 0 /// elogind does not support autospawning of vts
269 safe_close(m->reserve_vt_fd);
272 manager_shutdown_cgroup(m, true);
274 strv_free(m->kill_only_users);
275 strv_free(m->kill_exclude_users);
277 free(m->scheduled_shutdown_type);
278 free(m->scheduled_shutdown_tty);
279 free(m->wall_message);
281 strv_free(m->suspend_mode);
282 strv_free(m->suspend_state);
283 strv_free(m->hibernate_mode);
284 strv_free(m->hibernate_state);
285 strv_free(m->hybrid_sleep_mode);
286 strv_free(m->hybrid_sleep_state);
288 #if 0 /// UNNEEDED by elogind
294 static int manager_enumerate_devices(Manager *m) {
295 struct udev_list_entry *item = NULL, *first = NULL;
296 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
301 /* Loads devices from udev and creates seats for them as
304 e = udev_enumerate_new(m->udev);
308 r = udev_enumerate_add_match_tag(e, "master-of-seat");
312 r = udev_enumerate_add_match_is_initialized(e);
316 r = udev_enumerate_scan_devices(e);
320 first = udev_enumerate_get_list_entry(e);
321 udev_list_entry_foreach(item, first) {
322 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
325 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
329 k = manager_process_seat_device(m, d);
337 static int manager_enumerate_buttons(Manager *m) {
338 _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
339 struct udev_list_entry *item = NULL, *first = NULL;
344 /* Loads buttons from udev */
346 if (m->handle_power_key == HANDLE_IGNORE &&
347 m->handle_suspend_key == HANDLE_IGNORE &&
348 m->handle_hibernate_key == HANDLE_IGNORE &&
349 m->handle_lid_switch == HANDLE_IGNORE &&
350 m->handle_lid_switch_docked == HANDLE_IGNORE)
353 e = udev_enumerate_new(m->udev);
357 r = udev_enumerate_add_match_subsystem(e, "input");
361 r = udev_enumerate_add_match_tag(e, "power-switch");
365 r = udev_enumerate_add_match_is_initialized(e);
369 r = udev_enumerate_scan_devices(e);
373 first = udev_enumerate_get_list_entry(e);
374 udev_list_entry_foreach(item, first) {
375 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
378 d = udev_device_new_from_syspath(m->udev, udev_list_entry_get_name(item));
382 k = manager_process_button_device(m, d);
390 static int manager_enumerate_seats(Manager *m) {
391 _cleanup_closedir_ DIR *d = NULL;
397 /* This loads data about seats stored on disk, but does not
398 * actually create any seats. Removes data of seats that no
401 d = opendir("/run/systemd/seats");
406 return log_error_errno(errno, "Failed to open /run/systemd/seats: %m");
409 FOREACH_DIRENT(de, d, return -errno) {
413 if (!dirent_is_file(de))
416 s = hashmap_get(m->seats, de->d_name);
418 unlinkat(dirfd(d), de->d_name, 0);
430 static int manager_enumerate_linger_users(Manager *m) {
431 _cleanup_closedir_ DIR *d = NULL;
437 d = opendir("/var/lib/systemd/linger");
442 return log_error_errno(errno, "Failed to open /var/lib/systemd/linger/: %m");
445 FOREACH_DIRENT(de, d, return -errno) {
448 if (!dirent_is_file(de))
451 k = manager_add_user_by_name(m, de->d_name, NULL);
453 log_notice_errno(k, "Couldn't add lingering user %s: %m", de->d_name);
461 static int manager_enumerate_users(Manager *m) {
462 _cleanup_closedir_ DIR *d = NULL;
468 /* Add lingering users */
469 r = manager_enumerate_linger_users(m);
471 /* Read in user data stored on disk */
472 d = opendir("/run/systemd/users");
477 return log_error_errno(errno, "Failed to open /run/systemd/users: %m");
480 FOREACH_DIRENT(de, d, return -errno) {
483 if (!dirent_is_file(de))
486 k = manager_add_user_by_name(m, de->d_name, &u);
488 log_error_errno(k, "Failed to add user by file name %s: %m", de->d_name);
494 user_add_to_gc_queue(u);
504 static int manager_enumerate_sessions(Manager *m) {
505 _cleanup_closedir_ DIR *d = NULL;
511 /* Read in session data stored on disk */
512 d = opendir("/run/systemd/sessions");
517 return log_error_errno(errno, "Failed to open /run/systemd/sessions: %m");
520 FOREACH_DIRENT(de, d, return -errno) {
524 if (!dirent_is_file(de))
527 if (!session_id_valid(de->d_name)) {
528 log_warning("Invalid session file name '%s', ignoring.", de->d_name);
533 k = manager_add_session(m, de->d_name, &s);
535 log_error_errno(k, "Failed to add session by file name %s: %m", de->d_name);
541 session_add_to_gc_queue(s);
551 static int manager_enumerate_inhibitors(Manager *m) {
552 _cleanup_closedir_ DIR *d = NULL;
558 d = opendir("/run/systemd/inhibit");
563 return log_error_errno(errno, "Failed to open /run/systemd/inhibit: %m");
566 FOREACH_DIRENT(de, d, return -errno) {
570 if (!dirent_is_file(de))
573 k = manager_add_inhibitor(m, de->d_name, &i);
575 log_notice_errno(k, "Couldn't add inhibitor %s: %m", de->d_name);
580 k = inhibitor_load(i);
588 static int manager_dispatch_seat_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
589 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
590 Manager *m = userdata;
594 d = udev_monitor_receive_device(m->udev_seat_monitor);
598 manager_process_seat_device(m, d);
602 static int manager_dispatch_device_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
603 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
604 Manager *m = userdata;
608 d = udev_monitor_receive_device(m->udev_device_monitor);
612 manager_process_seat_device(m, d);
616 #if 0 /// UNNEEDED by elogind
617 static int manager_dispatch_vcsa_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
618 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
619 Manager *m = userdata;
624 d = udev_monitor_receive_device(m->udev_vcsa_monitor);
628 name = udev_device_get_sysname(d);
630 /* Whenever a VCSA device is removed try to reallocate our
631 * VTs, to make sure our auto VTs never go away. */
633 if (name && startswith(name, "vcsa") && streq_ptr(udev_device_get_action(d), "remove"))
634 seat_preallocate_vts(m->seat0);
640 static int manager_dispatch_button_udev(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
641 _cleanup_udev_device_unref_ struct udev_device *d = NULL;
642 Manager *m = userdata;
646 d = udev_monitor_receive_device(m->udev_button_monitor);
650 manager_process_button_device(m, d);
654 static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
655 Manager *m = userdata;
659 assert(m->console_active_fd == fd);
661 seat_read_active_vt(m->seat0);
665 #if 0 /// UNNEEDED by elogind
666 static int manager_reserve_vt(Manager *m) {
667 _cleanup_free_ char *p = NULL;
671 if (m->reserve_vt <= 0)
674 if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
677 m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
678 if (m->reserve_vt_fd < 0) {
680 /* Don't complain on VT-less systems */
682 log_warning_errno(errno, "Failed to pin reserved VT: %m");
690 static int signal_agent_released(sd_bus_message *message, void *userdata, sd_bus_error *error) {
691 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
692 Manager *m = userdata;
701 /* only accept org.freedesktop.systemd1.Agent from UID=0 */
702 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
706 r = sd_bus_creds_get_euid(creds, &sender_uid);
707 if (r < 0 || sender_uid != 0)
710 /* parse 'cgroup-empty' notification */
711 r = sd_bus_message_read(message, "s", &cgroup);
713 bus_log_parse_error(r);
717 s = hashmap_get(m->sessions, cgroup);
720 log_warning("Session not found: %s", cgroup);
730 static int manager_connect_bus(Manager *m) {
731 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
737 r = sd_bus_default_system(&m->bus);
739 return log_error_errno(r, "Failed to connect to system bus: %m");
741 r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable, m);
743 return log_error_errno(r, "Failed to add manager object vtable: %m");
745 /* elogind relies on signals from its release agent */
746 r = sd_bus_add_match(
750 "interface='org.freedesktop.elogind.Agent',"
752 "path='/org/freedesktop/elogind/agent'",
753 signal_agent_released, m);
755 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
757 return log_error_errno(r, "Failed to add seat object vtable: %m");
759 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/seat", seat_node_enumerator, m);
761 return log_error_errno(r, "Failed to add seat enumerator: %m");
763 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable, session_object_find, m);
765 return log_error_errno(r, "Failed to add session object vtable: %m");
767 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/session", session_node_enumerator, m);
769 return log_error_errno(r, "Failed to add session enumerator: %m");
771 r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable, user_object_find, m);
773 return log_error_errno(r, "Failed to add user object vtable: %m");
775 r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/login1/user", user_node_enumerator, m);
777 return log_error_errno(r, "Failed to add user enumerator: %m");
779 #if 0 /// elogind does not support systemd as PID 1
780 r = sd_bus_add_match(m->bus,
783 "sender='org.freedesktop.systemd1',"
784 "interface='org.freedesktop.systemd1.Manager',"
785 "member='JobRemoved',"
786 "path='/org/freedesktop/systemd1'",
787 match_job_removed, m);
789 return log_error_errno(r, "Failed to add match for JobRemoved: %m");
791 r = sd_bus_add_match(m->bus,
794 "sender='org.freedesktop.systemd1',"
795 "interface='org.freedesktop.systemd1.Manager',"
796 "member='UnitRemoved',"
797 "path='/org/freedesktop/systemd1'",
798 match_unit_removed, m);
800 return log_error_errno(r, "Failed to add match for UnitRemoved: %m");
802 r = sd_bus_add_match(m->bus,
805 "sender='org.freedesktop.systemd1',"
806 "interface='org.freedesktop.DBus.Properties',"
807 "member='PropertiesChanged'",
808 match_properties_changed, m);
810 return log_error_errno(r, "Failed to add match for PropertiesChanged: %m");
812 r = sd_bus_add_match(m->bus,
815 "sender='org.freedesktop.systemd1',"
816 "interface='org.freedesktop.systemd1.Manager',"
817 "member='Reloading',"
818 "path='/org/freedesktop/systemd1'",
821 return log_error_errno(r, "Failed to add match for Reloading: %m");
823 r = sd_bus_call_method(
825 "org.freedesktop.systemd1",
826 "/org/freedesktop/systemd1",
827 "org.freedesktop.systemd1.Manager",
832 log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
837 r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
839 return log_error_errno(r, "Failed to register name: %m");
841 r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL);
843 return log_error_errno(r, "Failed to attach bus to event loop: %m");
848 static int manager_vt_switch(sd_event_source *src, const struct signalfd_siginfo *si, void *data) {
850 Session *active, *iter;
853 * We got a VT-switch signal and we have to acknowledge it immediately.
854 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
855 * old user-space might run multiple sessions on a single VT, *sigh*.
856 * Therefore, we have to iterate all sessions and find one with a vtfd
857 * on the requested VT.
858 * As only VTs with active controllers have VT_PROCESS set, our current
859 * notion of the active VT might be wrong (for instance if the switch
860 * happens while we setup VT_PROCESS). Therefore, read the current VT
861 * first and then use s->active->vtnr as reference. Note that this is
862 * not racy, as no further VT-switch can happen as long as we're in
863 * synchronous VT_PROCESS mode.
867 seat_read_active_vt(m->seat0);
869 active = m->seat0->active;
870 if (!active || active->vtnr < 1) {
871 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
875 if (active->vtfd >= 0) {
876 session_leave_vt(active);
878 LIST_FOREACH(sessions_by_seat, iter, m->seat0->sessions) {
879 if (iter->vtnr == active->vtnr && iter->vtfd >= 0) {
880 session_leave_vt(iter);
889 static int manager_connect_console(Manager *m) {
893 assert(m->console_active_fd < 0);
895 /* On certain architectures (S390 and Xen, and containers),
896 /dev/tty0 does not exist, so don't fail if we can't open
898 if (access("/dev/tty0", F_OK) < 0)
901 m->console_active_fd = open("/sys/class/tty/tty0/active", O_RDONLY|O_NOCTTY|O_CLOEXEC);
902 if (m->console_active_fd < 0) {
904 /* On some systems the device node /dev/tty0 may exist
905 * even though /sys/class/tty/tty0 does not. */
909 return log_error_errno(errno, "Failed to open /sys/class/tty/tty0/active: %m");
912 r = sd_event_add_io(m->event, &m->console_active_event_source, m->console_active_fd, 0, manager_dispatch_console, m);
914 log_error("Failed to watch foreground console");
919 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
920 * as VT-acquire signal. We ignore any acquire-events (yes, we still
921 * have to provide a valid signal-number for it!) and acknowledge all
922 * release events immediately.
925 if (SIGRTMIN + 1 > SIGRTMAX) {
926 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN, SIGRTMAX);
930 assert_se(ignore_signals(SIGRTMIN + 1, -1) >= 0);
931 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN, -1) >= 0);
933 r = sd_event_add_signal(m->event, NULL, SIGRTMIN, manager_vt_switch, m);
940 static int manager_connect_udev(Manager *m) {
944 assert(!m->udev_seat_monitor);
945 assert(!m->udev_device_monitor);
946 assert(!m->udev_vcsa_monitor);
947 assert(!m->udev_button_monitor);
949 m->udev_seat_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
950 if (!m->udev_seat_monitor)
953 r = udev_monitor_filter_add_match_tag(m->udev_seat_monitor, "master-of-seat");
957 r = udev_monitor_enable_receiving(m->udev_seat_monitor);
961 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);
965 m->udev_device_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
966 if (!m->udev_device_monitor)
969 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "input", NULL);
973 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "graphics", NULL);
977 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_device_monitor, "drm", NULL);
981 r = udev_monitor_enable_receiving(m->udev_device_monitor);
985 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);
989 /* Don't watch keys if nobody cares */
990 if (m->handle_power_key != HANDLE_IGNORE ||
991 m->handle_suspend_key != HANDLE_IGNORE ||
992 m->handle_hibernate_key != HANDLE_IGNORE ||
993 m->handle_lid_switch != HANDLE_IGNORE ||
994 m->handle_lid_switch_docked != HANDLE_IGNORE) {
996 m->udev_button_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
997 if (!m->udev_button_monitor)
1000 r = udev_monitor_filter_add_match_tag(m->udev_button_monitor, "power-switch");
1004 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_button_monitor, "input", NULL);
1008 r = udev_monitor_enable_receiving(m->udev_button_monitor);
1012 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);
1017 /* Don't bother watching VCSA devices, if nobody cares */
1018 #if 0 /// elogind does not support autospawning of vts
1019 if (m->n_autovts > 0 && m->console_active_fd >= 0) {
1021 m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
1022 if (!m->udev_vcsa_monitor)
1025 r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
1029 r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
1033 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);
1042 static void manager_gc(Manager *m, bool drop_not_started) {
1049 while ((seat = m->seat_gc_queue)) {
1050 LIST_REMOVE(gc_queue, m->seat_gc_queue, seat);
1051 seat->in_gc_queue = false;
1053 if (!seat_check_gc(seat, drop_not_started)) {
1054 seat_stop(seat, false);
1059 while ((session = m->session_gc_queue)) {
1060 LIST_REMOVE(gc_queue, m->session_gc_queue, session);
1061 session->in_gc_queue = false;
1063 /* First, if we are not closing yet, initiate stopping */
1064 if (!session_check_gc(session, drop_not_started) &&
1065 session_get_state(session) != SESSION_CLOSING)
1066 session_stop(session, false);
1068 /* Normally, this should make the session referenced
1069 * again, if it doesn't then let's get rid of it
1071 if (!session_check_gc(session, drop_not_started)) {
1072 session_finalize(session);
1073 session_free(session);
1077 while ((user = m->user_gc_queue)) {
1078 LIST_REMOVE(gc_queue, m->user_gc_queue, user);
1079 user->in_gc_queue = false;
1081 /* First step: queue stop jobs */
1082 if (!user_check_gc(user, drop_not_started))
1083 user_stop(user, false);
1085 /* Second step: finalize user */
1086 if (!user_check_gc(user, drop_not_started)) {
1087 user_finalize(user);
1093 static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *userdata) {
1094 Manager *m = userdata;
1095 struct dual_timestamp since;
1101 if (m->idle_action == HANDLE_IGNORE ||
1102 m->idle_action_usec <= 0)
1105 n = now(CLOCK_MONOTONIC);
1107 r = manager_get_idle_hint(m, &since);
1109 /* Not idle. Let's check if after a timeout it might be idle then. */
1110 elapse = n + m->idle_action_usec;
1112 /* Idle! Let's see if it's time to do something, or if
1113 * we shall sleep for longer. */
1115 if (n >= since.monotonic + m->idle_action_usec &&
1116 (m->idle_action_not_before_usec <= 0 || n >= m->idle_action_not_before_usec + m->idle_action_usec)) {
1117 log_info("System idle. Taking action.");
1119 manager_handle_action(m, 0, m->idle_action, false, false);
1120 m->idle_action_not_before_usec = n;
1123 elapse = MAX(since.monotonic, m->idle_action_not_before_usec) + m->idle_action_usec;
1126 if (!m->idle_action_event_source) {
1128 r = sd_event_add_time(
1130 &m->idle_action_event_source,
1132 elapse, USEC_PER_SEC*30,
1133 manager_dispatch_idle_action, m);
1135 return log_error_errno(r, "Failed to add idle event source: %m");
1137 r = sd_event_source_set_priority(m->idle_action_event_source, SD_EVENT_PRIORITY_IDLE+10);
1139 return log_error_errno(r, "Failed to set idle event source priority: %m");
1141 r = sd_event_source_set_time(m->idle_action_event_source, elapse);
1143 return log_error_errno(r, "Failed to set idle event timer: %m");
1145 r = sd_event_source_set_enabled(m->idle_action_event_source, SD_EVENT_ONESHOT);
1147 return log_error_errno(r, "Failed to enable idle event timer: %m");
1153 static int manager_parse_config_file(Manager *m) {
1154 #if 0 /// elogind parses its own config file
1157 return config_parse_many(PKGSYSCONFDIR "/logind.conf",
1158 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1160 config_item_perf_lookup, logind_gperf_lookup,
1163 const char* logind_conf = getenv("ELOGIND_CONF_FILE");
1168 logind_conf = PKGSYSCONFDIR "/logind.conf";
1170 return config_parse(NULL, logind_conf, NULL, "Login\0Sleep\0",
1171 config_item_perf_lookup, logind_gperf_lookup,
1172 false, false, true, m);
1176 static int manager_dispatch_reload_signal(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
1177 Manager *m = userdata;
1180 manager_reset_config(m);
1181 r = manager_parse_config_file(m);
1183 log_warning_errno(r, "Failed to parse config file, using defaults: %m");
1185 log_info("Config file reloaded.");
1190 static int manager_startup(Manager *m) {
1196 Inhibitor *inhibitor;
1201 assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGHUP, -1) >= 0);
1203 r = sd_event_add_signal(m->event, NULL, SIGHUP, manager_dispatch_reload_signal, m);
1205 return log_error_errno(r, "Failed to register SIGHUP handler: %m");
1207 /* Connect to console */
1208 r = manager_connect_console(m);
1212 /* Connect to udev */
1213 r = manager_connect_udev(m);
1215 return log_error_errno(r, "Failed to create udev watchers: %m");
1217 /* Connect to the bus */
1218 r = manager_connect_bus(m);
1222 /* Instantiate magic seat 0 */
1223 r = manager_add_seat(m, "seat0", &m->seat0);
1225 return log_error_errno(r, "Failed to add seat0: %m");
1227 r = manager_set_lid_switch_ignore(m, 0 + m->holdoff_timeout_usec);
1229 log_warning_errno(r, "Failed to set up lid switch ignore event source: %m");
1231 /* Deserialize state */
1232 r = manager_enumerate_devices(m);
1234 log_warning_errno(r, "Device enumeration failed: %m");
1236 r = manager_enumerate_seats(m);
1238 log_warning_errno(r, "Seat enumeration failed: %m");
1240 r = manager_enumerate_users(m);
1242 log_warning_errno(r, "User enumeration failed: %m");
1244 r = manager_enumerate_sessions(m);
1246 log_warning_errno(r, "Session enumeration failed: %m");
1248 r = manager_enumerate_inhibitors(m);
1250 log_warning_errno(r, "Inhibitor enumeration failed: %m");
1252 r = manager_enumerate_buttons(m);
1254 log_warning_errno(r, "Button enumeration failed: %m");
1256 /* Remove stale objects before we start them */
1257 manager_gc(m, false);
1259 /* Reserve the special reserved VT */
1260 #if 0 /// elogind does not support autospawning of vts
1261 manager_reserve_vt(m);
1264 /* And start everything */
1265 HASHMAP_FOREACH(seat, m->seats, i)
1268 HASHMAP_FOREACH(user, m->users, i)
1271 HASHMAP_FOREACH(session, m->sessions, i)
1272 session_start(session);
1274 HASHMAP_FOREACH(inhibitor, m->inhibitors, i)
1275 inhibitor_start(inhibitor);
1277 HASHMAP_FOREACH(button, m->buttons, i)
1278 button_check_switches(button);
1280 manager_dispatch_idle_action(NULL, 0, m);
1285 static int manager_run(Manager *m) {
1291 r = sd_event_get_state(m->event);
1294 if (r == SD_EVENT_FINISHED)
1297 manager_gc(m, true);
1299 r = manager_dispatch_delayed(m, false);
1305 r = sd_event_run(m->event, (uint64_t) -1);
1311 int main(int argc, char *argv[]) {
1315 elogind_set_program_name(argv[0]);
1316 log_set_target(LOG_TARGET_AUTO);
1317 log_set_facility(LOG_AUTH);
1318 log_parse_environment();
1321 #ifdef ENABLE_DEBUG_ELOGIND
1322 log_set_max_level(LOG_DEBUG);
1323 #endif // ENABLE_DEBUG_ELOGIND
1328 log_error("This program takes no arguments.");
1333 r = mac_selinux_init();
1335 log_error_errno(r, "Could not initialize labelling: %m");
1339 /* Always create the directories people can create inotify
1340 * watches in. Note that some applications might check for the
1341 * existence of /run/systemd/seats/ to determine whether
1342 * logind is available, so please always make sure this check
1344 #if 0 /// elogind can not rely on systemd to help, so we need a bit more effort than this
1345 mkdir_label("/run/systemd/seats", 0755);
1346 mkdir_label("/run/systemd/users", 0755);
1347 mkdir_label("/run/systemd/sessions", 0755);
1349 r = mkdir_label("/run/systemd", 0755);
1350 if ( (r < 0) && (-EEXIST != r) )
1351 return log_error_errno(r, "Failed to create /run/systemd : %m");
1352 r = mkdir_label("/run/systemd/seats", 0755);
1353 if ( r < 0 && (-EEXIST != r) )
1354 return log_error_errno(r, "Failed to create /run/systemd/seats : %m");
1355 r = mkdir_label("/run/systemd/users", 0755);
1356 if ( r < 0 && (-EEXIST != r) )
1357 return log_error_errno(r, "Failed to create /run/systemd/users : %m");
1358 r = mkdir_label("/run/systemd/sessions", 0755);
1359 if ( r < 0 && (-EEXIST != r) )
1360 return log_error_errno(r, "Failed to create /run/systemd/sessions : %m");
1361 r = mkdir_label("/run/systemd/machines", 0755);
1362 if ( r < 0 && (-EEXIST != r) )
1363 return log_error_errno(r, "Failed to create /run/systemd/machines : %m");
1372 manager_parse_config_file(m);
1374 r = manager_startup(m);
1376 log_error_errno(r, "Failed to fully start up daemon: %m");
1380 log_debug("elogind running as pid "PID_FMT, getpid());
1384 "STATUS=Processing requests...");
1388 log_debug("elogind stopped as pid "PID_FMT, getpid());
1393 "STATUS=Shutting down...");
1397 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;