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/>.
27 #include "sd-daemon.h"
29 #include "alloc-util.h"
30 #include "bus-error.h"
32 #include "cgroup-util.h"
33 #include "conf-parser.h"
35 #include "dirent-util.h"
37 #include "format-util.h"
39 #include "process-util.h"
40 #include "selinux-util.h"
41 #include "signal-util.h"
43 #include "udev-util.h"
45 static void manager_free(Manager
*m
);
47 static void manager_reset_config(Manager
*m
) {
51 m
->inhibit_delay_max
= 5 * USEC_PER_SEC
;
52 m
->handle_power_key
= HANDLE_POWEROFF
;
53 m
->handle_suspend_key
= HANDLE_SUSPEND
;
54 m
->handle_hibernate_key
= HANDLE_HIBERNATE
;
55 m
->handle_lid_switch
= HANDLE_SUSPEND
;
56 m
->handle_lid_switch_docked
= HANDLE_IGNORE
;
57 m
->power_key_ignore_inhibited
= false;
58 m
->suspend_key_ignore_inhibited
= false;
59 m
->hibernate_key_ignore_inhibited
= false;
60 m
->lid_switch_ignore_inhibited
= true;
62 m
->holdoff_timeout_usec
= 30 * USEC_PER_SEC
;
64 m
->idle_action_usec
= 30 * USEC_PER_MINUTE
;
65 m
->idle_action
= HANDLE_IGNORE
;
67 m
->runtime_dir_size
= physical_memory_scale(10U, 100U); /* 10% */
68 m
->user_tasks_max
= system_tasks_max_scale(DEFAULT_USER_TASKS_MAX_PERCENTAGE
, 100U); /* 33% */
69 m
->sessions_max
= 8192;
70 m
->inhibitors_max
= 8192;
72 m
->kill_user_processes
= KILL_USER_PROCESSES
;
74 m
->kill_only_users
= strv_free(m
->kill_only_users
);
75 m
->kill_exclude_users
= strv_free(m
->kill_exclude_users
);
78 static Manager
*manager_new(void) {
86 m
->console_active_fd
= -1;
87 m
->reserve_vt_fd
= -1;
89 m
->idle_action_not_before_usec
= now(CLOCK_MONOTONIC
);
91 m
->devices
= hashmap_new(&string_hash_ops
);
92 m
->seats
= hashmap_new(&string_hash_ops
);
93 m
->sessions
= hashmap_new(&string_hash_ops
);
94 m
->users
= hashmap_new(NULL
);
95 m
->inhibitors
= hashmap_new(&string_hash_ops
);
96 m
->buttons
= hashmap_new(&string_hash_ops
);
98 m
->user_units
= hashmap_new(&string_hash_ops
);
99 m
->session_units
= hashmap_new(&string_hash_ops
);
101 if (!m
->devices
|| !m
->seats
|| !m
->sessions
|| !m
->users
|| !m
->inhibitors
|| !m
->buttons
|| !m
->user_units
|| !m
->session_units
)
104 m
->udev
= udev_new();
108 r
= sd_event_default(&m
->event
);
112 sd_event_set_watchdog(m
->event
, true);
114 manager_reset_config(m
);
123 static void manager_free(Manager
*m
) {
134 while ((session
= hashmap_first(m
->sessions
)))
135 session_free(session
);
137 while ((u
= hashmap_first(m
->users
)))
140 while ((d
= hashmap_first(m
->devices
)))
143 while ((s
= hashmap_first(m
->seats
)))
146 while ((i
= hashmap_first(m
->inhibitors
)))
149 while ((b
= hashmap_first(m
->buttons
)))
152 hashmap_free(m
->devices
);
153 hashmap_free(m
->seats
);
154 hashmap_free(m
->sessions
);
155 hashmap_free(m
->users
);
156 hashmap_free(m
->inhibitors
);
157 hashmap_free(m
->buttons
);
159 hashmap_free(m
->user_units
);
160 hashmap_free(m
->session_units
);
162 sd_event_source_unref(m
->idle_action_event_source
);
163 sd_event_source_unref(m
->inhibit_timeout_source
);
164 sd_event_source_unref(m
->scheduled_shutdown_timeout_source
);
165 sd_event_source_unref(m
->nologin_timeout_source
);
166 sd_event_source_unref(m
->wall_message_timeout_source
);
168 sd_event_source_unref(m
->console_active_event_source
);
169 sd_event_source_unref(m
->udev_seat_event_source
);
170 sd_event_source_unref(m
->udev_device_event_source
);
171 sd_event_source_unref(m
->udev_vcsa_event_source
);
172 sd_event_source_unref(m
->udev_button_event_source
);
173 sd_event_source_unref(m
->lid_switch_ignore_event_source
);
175 safe_close(m
->console_active_fd
);
177 udev_monitor_unref(m
->udev_seat_monitor
);
178 udev_monitor_unref(m
->udev_device_monitor
);
179 udev_monitor_unref(m
->udev_vcsa_monitor
);
180 udev_monitor_unref(m
->udev_button_monitor
);
184 if (m
->unlink_nologin
)
185 (void) unlink("/run/nologin");
187 bus_verify_polkit_async_registry_free(m
->polkit_registry
);
189 sd_bus_unref(m
->bus
);
190 sd_event_unref(m
->event
);
192 safe_close(m
->reserve_vt_fd
);
194 strv_free(m
->kill_only_users
);
195 strv_free(m
->kill_exclude_users
);
197 free(m
->scheduled_shutdown_type
);
198 free(m
->scheduled_shutdown_tty
);
199 free(m
->wall_message
);
204 static int manager_enumerate_devices(Manager
*m
) {
205 struct udev_list_entry
*item
= NULL
, *first
= NULL
;
206 _cleanup_udev_enumerate_unref_
struct udev_enumerate
*e
= NULL
;
211 /* Loads devices from udev and creates seats for them as
214 e
= udev_enumerate_new(m
->udev
);
218 r
= udev_enumerate_add_match_tag(e
, "master-of-seat");
222 r
= udev_enumerate_add_match_is_initialized(e
);
226 r
= udev_enumerate_scan_devices(e
);
230 first
= udev_enumerate_get_list_entry(e
);
231 udev_list_entry_foreach(item
, first
) {
232 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
235 d
= udev_device_new_from_syspath(m
->udev
, udev_list_entry_get_name(item
));
239 k
= manager_process_seat_device(m
, d
);
247 static int manager_enumerate_buttons(Manager
*m
) {
248 _cleanup_udev_enumerate_unref_
struct udev_enumerate
*e
= NULL
;
249 struct udev_list_entry
*item
= NULL
, *first
= NULL
;
254 /* Loads buttons from udev */
256 if (m
->handle_power_key
== HANDLE_IGNORE
&&
257 m
->handle_suspend_key
== HANDLE_IGNORE
&&
258 m
->handle_hibernate_key
== HANDLE_IGNORE
&&
259 m
->handle_lid_switch
== HANDLE_IGNORE
&&
260 m
->handle_lid_switch_docked
== HANDLE_IGNORE
)
263 e
= udev_enumerate_new(m
->udev
);
267 r
= udev_enumerate_add_match_subsystem(e
, "input");
271 r
= udev_enumerate_add_match_tag(e
, "power-switch");
275 r
= udev_enumerate_add_match_is_initialized(e
);
279 r
= udev_enumerate_scan_devices(e
);
283 first
= udev_enumerate_get_list_entry(e
);
284 udev_list_entry_foreach(item
, first
) {
285 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
288 d
= udev_device_new_from_syspath(m
->udev
, udev_list_entry_get_name(item
));
292 k
= manager_process_button_device(m
, d
);
300 static int manager_enumerate_seats(Manager
*m
) {
301 _cleanup_closedir_
DIR *d
= NULL
;
307 /* This loads data about seats stored on disk, but does not
308 * actually create any seats. Removes data of seats that no
311 d
= opendir("/run/systemd/seats");
316 return log_error_errno(errno
, "Failed to open /run/systemd/seats: %m");
319 FOREACH_DIRENT(de
, d
, return -errno
) {
323 if (!dirent_is_file(de
))
326 s
= hashmap_get(m
->seats
, de
->d_name
);
328 unlinkat(dirfd(d
), de
->d_name
, 0);
340 static int manager_enumerate_linger_users(Manager
*m
) {
341 _cleanup_closedir_
DIR *d
= NULL
;
347 d
= opendir("/var/lib/systemd/linger");
352 return log_error_errno(errno
, "Failed to open /var/lib/systemd/linger/: %m");
355 FOREACH_DIRENT(de
, d
, return -errno
) {
358 if (!dirent_is_file(de
))
361 k
= manager_add_user_by_name(m
, de
->d_name
, NULL
);
363 log_notice_errno(k
, "Couldn't add lingering user %s: %m", de
->d_name
);
371 static int manager_enumerate_users(Manager
*m
) {
372 _cleanup_closedir_
DIR *d
= NULL
;
378 /* Add lingering users */
379 r
= manager_enumerate_linger_users(m
);
381 /* Read in user data stored on disk */
382 d
= opendir("/run/systemd/users");
387 return log_error_errno(errno
, "Failed to open /run/systemd/users: %m");
390 FOREACH_DIRENT(de
, d
, return -errno
) {
393 if (!dirent_is_file(de
))
396 k
= manager_add_user_by_name(m
, de
->d_name
, &u
);
398 log_error_errno(k
, "Failed to add user by file name %s: %m", de
->d_name
);
404 user_add_to_gc_queue(u
);
414 static int manager_attach_fds(Manager
*m
) {
415 _cleanup_strv_free_
char **fdnames
= NULL
;
418 /* Upon restart, PID1 will send us back all fds of session devices
419 * that we previously opened. Each file descriptor is associated
420 * with a given session. The session ids are passed through FDNAMES. */
422 n
= sd_listen_fds_with_names(true, &fdnames
);
426 for (i
= 0; i
< n
; i
++) {
432 fd
= SD_LISTEN_FDS_START
+ i
;
434 id
= startswith(fdnames
[i
], "session-");
438 s
= hashmap_get(m
->sessions
, id
);
440 /* If the session doesn't exist anymore, the associated session
441 * device attached to this fd doesn't either. Let's simply close
443 log_debug("Failed to attach fd for unknown session: %s", id
);
448 if (fstat(fd
, &st
) < 0) {
449 /* The device is allowed to go away at a random point, in which
450 * case fstat failing is expected. */
451 log_debug_errno(errno
, "Failed to stat device fd for session %s: %m", id
);
456 sd
= hashmap_get(s
->devices
, &st
.st_rdev
);
458 /* Weird we got an fd for a session device which wasn't
459 * recorded in the session state file... */
460 log_warning("Got fd for missing session device [%u:%u] in session %s",
461 major(st
.st_rdev
), minor(st
.st_rdev
), s
->id
);
466 log_debug("Attaching fd to session device [%u:%u] for session %s",
467 major(st
.st_rdev
), minor(st
.st_rdev
), s
->id
);
469 session_device_attach_fd(sd
, fd
, s
->was_active
);
475 static int manager_enumerate_sessions(Manager
*m
) {
476 _cleanup_closedir_
DIR *d
= NULL
;
482 /* Read in session data stored on disk */
483 d
= opendir("/run/systemd/sessions");
488 return log_error_errno(errno
, "Failed to open /run/systemd/sessions: %m");
491 FOREACH_DIRENT(de
, d
, return -errno
) {
494 if (!dirent_is_file(de
))
497 if (!session_id_valid(de
->d_name
)) {
498 log_warning("Invalid session file name '%s', ignoring.", de
->d_name
);
503 k
= manager_add_session(m
, de
->d_name
, &s
);
505 log_error_errno(k
, "Failed to add session by file name %s: %m", de
->d_name
);
510 session_add_to_gc_queue(s
);
517 /* We might be restarted and PID1 could have sent us back the
518 * session device fds we previously saved. */
519 k
= manager_attach_fds(m
);
521 log_warning_errno(k
, "Failed to reattach session device fds: %m");
526 static int manager_enumerate_inhibitors(Manager
*m
) {
527 _cleanup_closedir_
DIR *d
= NULL
;
533 d
= opendir("/run/systemd/inhibit");
538 return log_error_errno(errno
, "Failed to open /run/systemd/inhibit: %m");
541 FOREACH_DIRENT(de
, d
, return -errno
) {
545 if (!dirent_is_file(de
))
548 k
= manager_add_inhibitor(m
, de
->d_name
, &i
);
550 log_notice_errno(k
, "Couldn't add inhibitor %s: %m", de
->d_name
);
555 k
= inhibitor_load(i
);
563 static int manager_dispatch_seat_udev(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
564 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
565 Manager
*m
= userdata
;
569 d
= udev_monitor_receive_device(m
->udev_seat_monitor
);
573 manager_process_seat_device(m
, d
);
577 static int manager_dispatch_device_udev(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
578 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
579 Manager
*m
= userdata
;
583 d
= udev_monitor_receive_device(m
->udev_device_monitor
);
587 manager_process_seat_device(m
, d
);
591 static int manager_dispatch_vcsa_udev(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
592 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
593 Manager
*m
= userdata
;
598 d
= udev_monitor_receive_device(m
->udev_vcsa_monitor
);
602 name
= udev_device_get_sysname(d
);
604 /* Whenever a VCSA device is removed try to reallocate our
605 * VTs, to make sure our auto VTs never go away. */
607 if (name
&& startswith(name
, "vcsa") && streq_ptr(udev_device_get_action(d
), "remove"))
608 seat_preallocate_vts(m
->seat0
);
613 static int manager_dispatch_button_udev(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
614 _cleanup_udev_device_unref_
struct udev_device
*d
= NULL
;
615 Manager
*m
= userdata
;
619 d
= udev_monitor_receive_device(m
->udev_button_monitor
);
623 manager_process_button_device(m
, d
);
627 static int manager_dispatch_console(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
628 Manager
*m
= userdata
;
632 assert(m
->console_active_fd
== fd
);
634 seat_read_active_vt(m
->seat0
);
638 static int manager_reserve_vt(Manager
*m
) {
639 _cleanup_free_
char *p
= NULL
;
643 if (m
->reserve_vt
<= 0)
646 if (asprintf(&p
, "/dev/tty%u", m
->reserve_vt
) < 0)
649 m
->reserve_vt_fd
= open(p
, O_RDWR
|O_NOCTTY
|O_CLOEXEC
|O_NONBLOCK
);
650 if (m
->reserve_vt_fd
< 0) {
652 /* Don't complain on VT-less systems */
654 log_warning_errno(errno
, "Failed to pin reserved VT: %m");
661 static int manager_connect_bus(Manager
*m
) {
667 r
= sd_bus_default_system(&m
->bus
);
669 return log_error_errno(r
, "Failed to connect to system bus: %m");
671 r
= sd_bus_add_object_vtable(m
->bus
, NULL
, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable
, m
);
673 return log_error_errno(r
, "Failed to add manager object vtable: %m");
675 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable
, seat_object_find
, m
);
677 return log_error_errno(r
, "Failed to add seat object vtable: %m");
679 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/login1/seat", seat_node_enumerator
, m
);
681 return log_error_errno(r
, "Failed to add seat enumerator: %m");
683 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable
, session_object_find
, m
);
685 return log_error_errno(r
, "Failed to add session object vtable: %m");
687 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/login1/session", session_node_enumerator
, m
);
689 return log_error_errno(r
, "Failed to add session enumerator: %m");
691 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable
, user_object_find
, m
);
693 return log_error_errno(r
, "Failed to add user object vtable: %m");
695 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/login1/user", user_node_enumerator
, m
);
697 return log_error_errno(r
, "Failed to add user enumerator: %m");
699 r
= sd_bus_match_signal_async(
702 "org.freedesktop.systemd1",
703 "/org/freedesktop/systemd1",
704 "org.freedesktop.systemd1.Manager",
706 match_job_removed
, NULL
, m
);
708 return log_error_errno(r
, "Failed to request match for JobRemoved: %m");
710 r
= sd_bus_match_signal_async(
713 "org.freedesktop.systemd1",
714 "/org/freedesktop/systemd1",
715 "org.freedesktop.systemd1.Manager",
717 match_unit_removed
, NULL
, m
);
719 return log_error_errno(r
, "Failed to request match for UnitRemoved: %m");
721 r
= sd_bus_match_signal_async(
724 "org.freedesktop.systemd1",
726 "org.freedesktop.DBus.Properties",
728 match_properties_changed
, NULL
, m
);
730 return log_error_errno(r
, "Failed to request match for PropertiesChanged: %m");
732 r
= sd_bus_match_signal_async(
735 "org.freedesktop.systemd1",
736 "/org/freedesktop/systemd1",
737 "org.freedesktop.systemd1.Manager",
739 match_reloading
, NULL
, m
);
741 return log_error_errno(r
, "Failed to request match for Reloading: %m");
743 r
= sd_bus_call_method_async(
746 "org.freedesktop.systemd1",
747 "/org/freedesktop/systemd1",
748 "org.freedesktop.systemd1.Manager",
753 return log_error_errno(r
, "Failed to enable subscription: %m");
755 r
= sd_bus_request_name_async(m
->bus
, NULL
, "org.freedesktop.login1", 0, NULL
, NULL
);
757 return log_error_errno(r
, "Failed to request name: %m");
759 r
= sd_bus_attach_event(m
->bus
, m
->event
, SD_EVENT_PRIORITY_NORMAL
);
761 return log_error_errno(r
, "Failed to attach bus to event loop: %m");
766 static int manager_vt_switch(sd_event_source
*src
, const struct signalfd_siginfo
*si
, void *data
) {
768 Session
*active
, *iter
;
771 * We got a VT-switch signal and we have to acknowledge it immediately.
772 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
773 * old user-space might run multiple sessions on a single VT, *sigh*.
774 * Therefore, we have to iterate all sessions and find one with a vtfd
775 * on the requested VT.
776 * As only VTs with active controllers have VT_PROCESS set, our current
777 * notion of the active VT might be wrong (for instance if the switch
778 * happens while we setup VT_PROCESS). Therefore, read the current VT
779 * first and then use s->active->vtnr as reference. Note that this is
780 * not racy, as no further VT-switch can happen as long as we're in
781 * synchronous VT_PROCESS mode.
785 seat_read_active_vt(m
->seat0
);
787 active
= m
->seat0
->active
;
788 if (!active
|| active
->vtnr
< 1) {
789 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
793 if (active
->vtfd
>= 0) {
794 session_leave_vt(active
);
796 LIST_FOREACH(sessions_by_seat
, iter
, m
->seat0
->sessions
) {
797 if (iter
->vtnr
== active
->vtnr
&& iter
->vtfd
>= 0) {
798 session_leave_vt(iter
);
807 static int manager_connect_console(Manager
*m
) {
811 assert(m
->console_active_fd
< 0);
813 /* On certain architectures (S390 and Xen, and containers),
814 /dev/tty0 does not exist, so don't fail if we can't open
816 if (access("/dev/tty0", F_OK
) < 0)
819 m
->console_active_fd
= open("/sys/class/tty/tty0/active", O_RDONLY
|O_NOCTTY
|O_CLOEXEC
);
820 if (m
->console_active_fd
< 0) {
822 /* On some systems the device node /dev/tty0 may exist
823 * even though /sys/class/tty/tty0 does not. */
827 return log_error_errno(errno
, "Failed to open /sys/class/tty/tty0/active: %m");
830 r
= sd_event_add_io(m
->event
, &m
->console_active_event_source
, m
->console_active_fd
, 0, manager_dispatch_console
, m
);
832 log_error("Failed to watch foreground console");
837 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
838 * as VT-acquire signal. We ignore any acquire-events (yes, we still
839 * have to provide a valid signal-number for it!) and acknowledge all
840 * release events immediately.
843 if (SIGRTMIN
+ 1 > SIGRTMAX
) {
844 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN
, SIGRTMAX
);
848 assert_se(ignore_signals(SIGRTMIN
+ 1, -1) >= 0);
849 assert_se(sigprocmask_many(SIG_BLOCK
, NULL
, SIGRTMIN
, -1) >= 0);
851 r
= sd_event_add_signal(m
->event
, NULL
, SIGRTMIN
, manager_vt_switch
, m
);
858 static int manager_connect_udev(Manager
*m
) {
862 assert(!m
->udev_seat_monitor
);
863 assert(!m
->udev_device_monitor
);
864 assert(!m
->udev_vcsa_monitor
);
865 assert(!m
->udev_button_monitor
);
867 m
->udev_seat_monitor
= udev_monitor_new_from_netlink(m
->udev
, "udev");
868 if (!m
->udev_seat_monitor
)
871 r
= udev_monitor_filter_add_match_tag(m
->udev_seat_monitor
, "master-of-seat");
875 r
= udev_monitor_enable_receiving(m
->udev_seat_monitor
);
879 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
);
883 m
->udev_device_monitor
= udev_monitor_new_from_netlink(m
->udev
, "udev");
884 if (!m
->udev_device_monitor
)
887 r
= udev_monitor_filter_add_match_subsystem_devtype(m
->udev_device_monitor
, "input", NULL
);
891 r
= udev_monitor_filter_add_match_subsystem_devtype(m
->udev_device_monitor
, "graphics", NULL
);
895 r
= udev_monitor_filter_add_match_subsystem_devtype(m
->udev_device_monitor
, "drm", NULL
);
899 r
= udev_monitor_enable_receiving(m
->udev_device_monitor
);
903 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
);
907 /* Don't watch keys if nobody cares */
908 if (m
->handle_power_key
!= HANDLE_IGNORE
||
909 m
->handle_suspend_key
!= HANDLE_IGNORE
||
910 m
->handle_hibernate_key
!= HANDLE_IGNORE
||
911 m
->handle_lid_switch
!= HANDLE_IGNORE
||
912 m
->handle_lid_switch_docked
!= HANDLE_IGNORE
) {
914 m
->udev_button_monitor
= udev_monitor_new_from_netlink(m
->udev
, "udev");
915 if (!m
->udev_button_monitor
)
918 r
= udev_monitor_filter_add_match_tag(m
->udev_button_monitor
, "power-switch");
922 r
= udev_monitor_filter_add_match_subsystem_devtype(m
->udev_button_monitor
, "input", NULL
);
926 r
= udev_monitor_enable_receiving(m
->udev_button_monitor
);
930 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
);
935 /* Don't bother watching VCSA devices, if nobody cares */
936 if (m
->n_autovts
> 0 && m
->console_active_fd
>= 0) {
938 m
->udev_vcsa_monitor
= udev_monitor_new_from_netlink(m
->udev
, "udev");
939 if (!m
->udev_vcsa_monitor
)
942 r
= udev_monitor_filter_add_match_subsystem_devtype(m
->udev_vcsa_monitor
, "vc", NULL
);
946 r
= udev_monitor_enable_receiving(m
->udev_vcsa_monitor
);
950 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
);
958 static void manager_gc(Manager
*m
, bool drop_not_started
) {
965 while ((seat
= m
->seat_gc_queue
)) {
966 LIST_REMOVE(gc_queue
, m
->seat_gc_queue
, seat
);
967 seat
->in_gc_queue
= false;
969 if (!seat_check_gc(seat
, drop_not_started
)) {
970 seat_stop(seat
, false);
975 while ((session
= m
->session_gc_queue
)) {
976 LIST_REMOVE(gc_queue
, m
->session_gc_queue
, session
);
977 session
->in_gc_queue
= false;
979 /* First, if we are not closing yet, initiate stopping */
980 if (!session_check_gc(session
, drop_not_started
) &&
981 session_get_state(session
) != SESSION_CLOSING
)
982 session_stop(session
, false);
984 /* Normally, this should make the session referenced
985 * again, if it doesn't then let's get rid of it
987 if (!session_check_gc(session
, drop_not_started
)) {
988 session_finalize(session
);
989 session_free(session
);
993 while ((user
= m
->user_gc_queue
)) {
994 LIST_REMOVE(gc_queue
, m
->user_gc_queue
, user
);
995 user
->in_gc_queue
= false;
997 /* First step: queue stop jobs */
998 if (!user_check_gc(user
, drop_not_started
))
999 user_stop(user
, false);
1001 /* Second step: finalize user */
1002 if (!user_check_gc(user
, drop_not_started
)) {
1003 user_finalize(user
);
1009 static int manager_dispatch_idle_action(sd_event_source
*s
, uint64_t t
, void *userdata
) {
1010 Manager
*m
= userdata
;
1011 struct dual_timestamp since
;
1017 if (m
->idle_action
== HANDLE_IGNORE
||
1018 m
->idle_action_usec
<= 0)
1021 n
= now(CLOCK_MONOTONIC
);
1023 r
= manager_get_idle_hint(m
, &since
);
1025 /* Not idle. Let's check if after a timeout it might be idle then. */
1026 elapse
= n
+ m
->idle_action_usec
;
1028 /* Idle! Let's see if it's time to do something, or if
1029 * we shall sleep for longer. */
1031 if (n
>= since
.monotonic
+ m
->idle_action_usec
&&
1032 (m
->idle_action_not_before_usec
<= 0 || n
>= m
->idle_action_not_before_usec
+ m
->idle_action_usec
)) {
1033 log_info("System idle. Taking action.");
1035 manager_handle_action(m
, 0, m
->idle_action
, false, false);
1036 m
->idle_action_not_before_usec
= n
;
1039 elapse
= MAX(since
.monotonic
, m
->idle_action_not_before_usec
) + m
->idle_action_usec
;
1042 if (!m
->idle_action_event_source
) {
1044 r
= sd_event_add_time(
1046 &m
->idle_action_event_source
,
1048 elapse
, USEC_PER_SEC
*30,
1049 manager_dispatch_idle_action
, m
);
1051 return log_error_errno(r
, "Failed to add idle event source: %m");
1053 r
= sd_event_source_set_priority(m
->idle_action_event_source
, SD_EVENT_PRIORITY_IDLE
+10);
1055 return log_error_errno(r
, "Failed to set idle event source priority: %m");
1057 r
= sd_event_source_set_time(m
->idle_action_event_source
, elapse
);
1059 return log_error_errno(r
, "Failed to set idle event timer: %m");
1061 r
= sd_event_source_set_enabled(m
->idle_action_event_source
, SD_EVENT_ONESHOT
);
1063 return log_error_errno(r
, "Failed to enable idle event timer: %m");
1069 static int manager_parse_config_file(Manager
*m
) {
1072 return config_parse_many_nulstr(PKGSYSCONFDIR
"/logind.conf",
1073 CONF_PATHS_NULSTR("systemd/logind.conf.d"),
1075 config_item_perf_lookup
, logind_gperf_lookup
,
1076 CONFIG_PARSE_WARN
, m
);
1079 static int manager_dispatch_reload_signal(sd_event_source
*s
, const struct signalfd_siginfo
*si
, void *userdata
) {
1080 Manager
*m
= userdata
;
1083 manager_reset_config(m
);
1084 r
= manager_parse_config_file(m
);
1086 log_warning_errno(r
, "Failed to parse config file, using defaults: %m");
1088 log_info("Config file reloaded.");
1093 static int manager_startup(Manager
*m
) {
1099 Inhibitor
*inhibitor
;
1104 assert_se(sigprocmask_many(SIG_SETMASK
, NULL
, SIGHUP
, -1) >= 0);
1106 r
= sd_event_add_signal(m
->event
, NULL
, SIGHUP
, manager_dispatch_reload_signal
, m
);
1108 return log_error_errno(r
, "Failed to register SIGHUP handler: %m");
1110 /* Connect to console */
1111 r
= manager_connect_console(m
);
1115 /* Connect to udev */
1116 r
= manager_connect_udev(m
);
1118 return log_error_errno(r
, "Failed to create udev watchers: %m");
1120 /* Connect to the bus */
1121 r
= manager_connect_bus(m
);
1125 /* Instantiate magic seat 0 */
1126 r
= manager_add_seat(m
, "seat0", &m
->seat0
);
1128 return log_error_errno(r
, "Failed to add seat0: %m");
1130 r
= manager_set_lid_switch_ignore(m
, 0 + m
->holdoff_timeout_usec
);
1132 log_warning_errno(r
, "Failed to set up lid switch ignore event source: %m");
1134 /* Deserialize state */
1135 r
= manager_enumerate_devices(m
);
1137 log_warning_errno(r
, "Device enumeration failed: %m");
1139 r
= manager_enumerate_seats(m
);
1141 log_warning_errno(r
, "Seat enumeration failed: %m");
1143 r
= manager_enumerate_users(m
);
1145 log_warning_errno(r
, "User enumeration failed: %m");
1147 r
= manager_enumerate_sessions(m
);
1149 log_warning_errno(r
, "Session enumeration failed: %m");
1151 r
= manager_enumerate_inhibitors(m
);
1153 log_warning_errno(r
, "Inhibitor enumeration failed: %m");
1155 r
= manager_enumerate_buttons(m
);
1157 log_warning_errno(r
, "Button enumeration failed: %m");
1159 /* Remove stale objects before we start them */
1160 manager_gc(m
, false);
1162 /* Reserve the special reserved VT */
1163 manager_reserve_vt(m
);
1165 /* And start everything */
1166 HASHMAP_FOREACH(seat
, m
->seats
, i
)
1169 HASHMAP_FOREACH(user
, m
->users
, i
)
1172 HASHMAP_FOREACH(session
, m
->sessions
, i
)
1173 session_start(session
);
1175 HASHMAP_FOREACH(inhibitor
, m
->inhibitors
, i
)
1176 inhibitor_start(inhibitor
);
1178 HASHMAP_FOREACH(button
, m
->buttons
, i
)
1179 button_check_switches(button
);
1181 manager_dispatch_idle_action(NULL
, 0, m
);
1186 static int manager_run(Manager
*m
) {
1192 r
= sd_event_get_state(m
->event
);
1195 if (r
== SD_EVENT_FINISHED
)
1198 manager_gc(m
, true);
1200 r
= manager_dispatch_delayed(m
, false);
1206 r
= sd_event_run(m
->event
, (uint64_t) -1);
1212 int main(int argc
, char *argv
[]) {
1216 log_set_target(LOG_TARGET_AUTO
);
1217 log_set_facility(LOG_AUTH
);
1218 log_parse_environment();
1224 log_error("This program takes no arguments.");
1229 r
= mac_selinux_init();
1231 log_error_errno(r
, "Could not initialize labelling: %m");
1235 /* Always create the directories people can create inotify
1236 * watches in. Note that some applications might check for the
1237 * existence of /run/systemd/seats/ to determine whether
1238 * logind is available, so please always make sure this check
1240 mkdir_label("/run/systemd/seats", 0755);
1241 mkdir_label("/run/systemd/users", 0755);
1242 mkdir_label("/run/systemd/sessions", 0755);
1250 manager_parse_config_file(m
);
1252 r
= manager_startup(m
);
1254 log_error_errno(r
, "Failed to fully start up daemon: %m");
1258 log_debug("systemd-logind running as pid "PID_FMT
, getpid_cached());
1262 "STATUS=Processing requests...");
1266 log_debug("systemd-logind stopped as pid "PID_FMT
, getpid_cached());
1271 "STATUS=Shutting down...");
1275 return r
< 0 ? EXIT_FAILURE
: EXIT_SUCCESS
;