1 /* SPDX-License-Identifier: LGPL-2.1+ */
11 #include "alloc-util.h"
12 #include "bus-error.h"
14 #include "cgroup-util.h"
16 #include "device-util.h"
17 #include "dirent-util.h"
19 #include "format-util.h"
22 #include "parse-util.h"
23 #include "process-util.h"
24 #include "selinux-util.h"
25 #include "signal-util.h"
28 static Manager
* manager_unref(Manager
*m
);
29 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager
*, manager_unref
);
31 static int manager_new(Manager
**ret
) {
32 _cleanup_(manager_unrefp
) Manager
*m
= NULL
;
42 .console_active_fd
= -1,
46 m
->idle_action_not_before_usec
= now(CLOCK_MONOTONIC
);
48 m
->devices
= hashmap_new(&string_hash_ops
);
49 m
->seats
= hashmap_new(&string_hash_ops
);
50 m
->sessions
= hashmap_new(&string_hash_ops
);
51 m
->sessions_by_leader
= hashmap_new(NULL
);
52 m
->users
= hashmap_new(NULL
);
53 m
->inhibitors
= hashmap_new(&string_hash_ops
);
54 m
->buttons
= hashmap_new(&string_hash_ops
);
56 m
->user_units
= hashmap_new(&string_hash_ops
);
57 m
->session_units
= hashmap_new(&string_hash_ops
);
59 if (!m
->devices
|| !m
->seats
|| !m
->sessions
|| !m
->sessions_by_leader
|| !m
->users
|| !m
->inhibitors
|| !m
->buttons
|| !m
->user_units
|| !m
->session_units
)
62 r
= sd_event_default(&m
->event
);
66 r
= sd_event_add_signal(m
->event
, NULL
, SIGINT
, NULL
, NULL
);
70 r
= sd_event_add_signal(m
->event
, NULL
, SIGTERM
, NULL
, NULL
);
74 (void) sd_event_set_watchdog(m
->event
, true);
76 manager_reset_config(m
);
82 static Manager
* manager_unref(Manager
*m
) {
93 while ((session
= hashmap_first(m
->sessions
)))
94 session_free(session
);
96 while ((u
= hashmap_first(m
->users
)))
99 while ((d
= hashmap_first(m
->devices
)))
102 while ((s
= hashmap_first(m
->seats
)))
105 while ((i
= hashmap_first(m
->inhibitors
)))
108 while ((b
= hashmap_first(m
->buttons
)))
111 hashmap_free(m
->devices
);
112 hashmap_free(m
->seats
);
113 hashmap_free(m
->sessions
);
114 hashmap_free(m
->sessions_by_leader
);
115 hashmap_free(m
->users
);
116 hashmap_free(m
->inhibitors
);
117 hashmap_free(m
->buttons
);
119 hashmap_free(m
->user_units
);
120 hashmap_free(m
->session_units
);
122 sd_event_source_unref(m
->idle_action_event_source
);
123 sd_event_source_unref(m
->inhibit_timeout_source
);
124 sd_event_source_unref(m
->scheduled_shutdown_timeout_source
);
125 sd_event_source_unref(m
->nologin_timeout_source
);
126 sd_event_source_unref(m
->wall_message_timeout_source
);
128 sd_event_source_unref(m
->console_active_event_source
);
129 sd_event_source_unref(m
->lid_switch_ignore_event_source
);
132 sd_event_source_unref(m
->utmp_event_source
);
135 safe_close(m
->console_active_fd
);
137 sd_device_monitor_unref(m
->device_seat_monitor
);
138 sd_device_monitor_unref(m
->device_monitor
);
139 sd_device_monitor_unref(m
->device_vcsa_monitor
);
140 sd_device_monitor_unref(m
->device_button_monitor
);
142 if (m
->unlink_nologin
)
143 (void) unlink_or_warn("/run/nologin");
145 bus_verify_polkit_async_registry_free(m
->polkit_registry
);
147 sd_bus_unref(m
->bus
);
148 sd_event_unref(m
->event
);
150 safe_close(m
->reserve_vt_fd
);
152 strv_free(m
->kill_only_users
);
153 strv_free(m
->kill_exclude_users
);
155 free(m
->scheduled_shutdown_type
);
156 free(m
->scheduled_shutdown_tty
);
157 free(m
->wall_message
);
163 static int manager_enumerate_devices(Manager
*m
) {
164 _cleanup_(sd_device_enumerator_unrefp
) sd_device_enumerator
*e
= NULL
;
170 /* Loads devices from udev and creates seats for them as
173 r
= sd_device_enumerator_new(&e
);
177 r
= sd_device_enumerator_add_match_tag(e
, "master-of-seat");
181 FOREACH_DEVICE(e
, d
) {
184 k
= manager_process_seat_device(m
, d
);
192 static int manager_enumerate_buttons(Manager
*m
) {
193 _cleanup_(sd_device_enumerator_unrefp
) sd_device_enumerator
*e
= NULL
;
199 /* Loads buttons from udev */
201 if (manager_all_buttons_ignored(m
))
204 r
= sd_device_enumerator_new(&e
);
208 r
= sd_device_enumerator_add_match_subsystem(e
, "input", true);
212 r
= sd_device_enumerator_add_match_tag(e
, "power-switch");
216 FOREACH_DEVICE(e
, d
) {
219 k
= manager_process_button_device(m
, d
);
227 static int manager_enumerate_seats(Manager
*m
) {
228 _cleanup_closedir_
DIR *d
= NULL
;
234 /* This loads data about seats stored on disk, but does not
235 * actually create any seats. Removes data of seats that no
238 d
= opendir("/run/systemd/seats");
243 return log_error_errno(errno
, "Failed to open /run/systemd/seats: %m");
246 FOREACH_DIRENT(de
, d
, return -errno
) {
250 if (!dirent_is_file(de
))
253 s
= hashmap_get(m
->seats
, de
->d_name
);
255 if (unlinkat(dirfd(d
), de
->d_name
, 0) < 0)
256 log_warning("Failed to remove /run/systemd/seats/%s: %m",
269 static int manager_enumerate_linger_users(Manager
*m
) {
270 _cleanup_closedir_
DIR *d
= NULL
;
276 d
= opendir("/var/lib/systemd/linger");
281 return log_error_errno(errno
, "Failed to open /var/lib/systemd/linger/: %m");
284 FOREACH_DIRENT(de
, d
, return -errno
) {
287 if (!dirent_is_file(de
))
290 k
= manager_add_user_by_name(m
, de
->d_name
, NULL
);
292 log_notice_errno(k
, "Couldn't add lingering user %s: %m", de
->d_name
);
300 static int manager_enumerate_users(Manager
*m
) {
301 _cleanup_closedir_
DIR *d
= NULL
;
307 /* Add lingering users */
308 r
= manager_enumerate_linger_users(m
);
310 /* Read in user data stored on disk */
311 d
= opendir("/run/systemd/users");
316 return log_error_errno(errno
, "Failed to open /run/systemd/users: %m");
319 FOREACH_DIRENT(de
, d
, return -errno
) {
322 if (!dirent_is_file(de
))
325 k
= manager_add_user_by_name(m
, de
->d_name
, &u
);
327 log_error_errno(k
, "Failed to add user by file name %s: %m", de
->d_name
);
333 user_add_to_gc_queue(u
);
343 static int parse_fdname(const char *fdname
, char **session_id
, dev_t
*dev
) {
344 _cleanup_strv_free_
char **parts
= NULL
;
345 _cleanup_free_
char *id
= NULL
;
346 unsigned major
, minor
;
349 parts
= strv_split(fdname
, "-");
352 if (strv_length(parts
) != 5)
355 if (!streq(parts
[0], "session"))
358 id
= strdup(parts
[1]);
362 if (!streq(parts
[2], "device"))
365 r
= safe_atou(parts
[3], &major
);
368 r
= safe_atou(parts
[4], &minor
);
372 *dev
= makedev(major
, minor
);
373 *session_id
= TAKE_PTR(id
);
378 static int manager_attach_fds(Manager
*m
) {
379 _cleanup_strv_free_
char **fdnames
= NULL
;
382 /* Upon restart, PID1 will send us back all fds of session devices
383 * that we previously opened. Each file descriptor is associated
384 * with a given session. The session ids are passed through FDNAMES. */
386 n
= sd_listen_fds_with_names(true, &fdnames
);
390 for (i
= 0; i
< n
; i
++) {
391 _cleanup_free_
char *id
= NULL
;
398 fd
= SD_LISTEN_FDS_START
+ i
;
400 r
= parse_fdname(fdnames
[i
], &id
, &dev
);
402 log_debug_errno(r
, "Failed to parse fd name %s: %m", fdnames
[i
]);
407 s
= hashmap_get(m
->sessions
, id
);
409 /* If the session doesn't exist anymore, the associated session
410 * device attached to this fd doesn't either. Let's simply close
412 log_debug("Failed to attach fd for unknown session: %s", id
);
417 if (fstat(fd
, &st
) < 0) {
418 /* The device is allowed to go away at a random point, in which
419 * case fstat failing is expected. */
420 log_debug_errno(errno
, "Failed to stat device fd for session %s: %m", id
);
425 if (!S_ISCHR(st
.st_mode
) || st
.st_rdev
!= dev
) {
426 log_debug("Device fd doesn't point to the expected character device node");
431 sd
= hashmap_get(s
->devices
, &dev
);
433 /* Weird, we got an fd for a session device which wasn't
434 * recorded in the session state file... */
435 log_warning("Got fd for missing session device [%u:%u] in session %s",
436 major(dev
), minor(dev
), s
->id
);
441 log_debug("Attaching fd to session device [%u:%u] for session %s",
442 major(dev
), minor(dev
), s
->id
);
444 session_device_attach_fd(sd
, fd
, s
->was_active
);
450 static int manager_enumerate_sessions(Manager
*m
) {
451 _cleanup_closedir_
DIR *d
= NULL
;
457 /* Read in session data stored on disk */
458 d
= opendir("/run/systemd/sessions");
463 return log_error_errno(errno
, "Failed to open /run/systemd/sessions: %m");
466 FOREACH_DIRENT(de
, d
, return -errno
) {
469 if (!dirent_is_file(de
))
472 if (!session_id_valid(de
->d_name
)) {
473 log_warning("Invalid session file name '%s', ignoring.", de
->d_name
);
478 k
= manager_add_session(m
, de
->d_name
, &s
);
480 log_error_errno(k
, "Failed to add session by file name %s: %m", de
->d_name
);
485 session_add_to_gc_queue(s
);
492 /* We might be restarted and PID1 could have sent us back the
493 * session device fds we previously saved. */
494 k
= manager_attach_fds(m
);
496 log_warning_errno(k
, "Failed to reattach session device fds: %m");
501 static int manager_enumerate_inhibitors(Manager
*m
) {
502 _cleanup_closedir_
DIR *d
= NULL
;
508 d
= opendir("/run/systemd/inhibit");
513 return log_error_errno(errno
, "Failed to open /run/systemd/inhibit: %m");
516 FOREACH_DIRENT(de
, d
, return -errno
) {
520 if (!dirent_is_file(de
))
523 k
= manager_add_inhibitor(m
, de
->d_name
, &i
);
525 log_notice_errno(k
, "Couldn't add inhibitor %s: %m", de
->d_name
);
530 k
= inhibitor_load(i
);
538 static int manager_dispatch_seat_udev(sd_device_monitor
*monitor
, sd_device
*device
, void *userdata
) {
539 Manager
*m
= userdata
;
544 manager_process_seat_device(m
, device
);
548 static int manager_dispatch_device_udev(sd_device_monitor
*monitor
, sd_device
*device
, void *userdata
) {
549 Manager
*m
= userdata
;
554 manager_process_seat_device(m
, device
);
558 static int manager_dispatch_vcsa_udev(sd_device_monitor
*monitor
, sd_device
*device
, void *userdata
) {
559 Manager
*m
= userdata
;
560 const char *name
, *action
;
565 /* Whenever a VCSA device is removed try to reallocate our
566 * VTs, to make sure our auto VTs never go away. */
568 if (sd_device_get_sysname(device
, &name
) >= 0 &&
569 startswith(name
, "vcsa") &&
570 sd_device_get_property_value(device
, "ACTION", &action
) >= 0 &&
571 streq(action
, "remove"))
572 seat_preallocate_vts(m
->seat0
);
577 static int manager_dispatch_button_udev(sd_device_monitor
*monitor
, sd_device
*device
, void *userdata
) {
578 Manager
*m
= userdata
;
583 manager_process_button_device(m
, device
);
587 static int manager_dispatch_console(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
588 Manager
*m
= userdata
;
592 assert(m
->console_active_fd
== fd
);
594 seat_read_active_vt(m
->seat0
);
598 static int manager_reserve_vt(Manager
*m
) {
599 _cleanup_free_
char *p
= NULL
;
603 if (m
->reserve_vt
<= 0)
606 if (asprintf(&p
, "/dev/tty%u", m
->reserve_vt
) < 0)
609 m
->reserve_vt_fd
= open(p
, O_RDWR
|O_NOCTTY
|O_CLOEXEC
|O_NONBLOCK
);
610 if (m
->reserve_vt_fd
< 0) {
612 /* Don't complain on VT-less systems */
614 log_warning_errno(errno
, "Failed to pin reserved VT: %m");
621 static int manager_connect_bus(Manager
*m
) {
627 r
= sd_bus_default_system(&m
->bus
);
629 return log_error_errno(r
, "Failed to connect to system bus: %m");
631 r
= sd_bus_add_object_vtable(m
->bus
, NULL
, "/org/freedesktop/login1", "org.freedesktop.login1.Manager", manager_vtable
, m
);
633 return log_error_errno(r
, "Failed to add manager object vtable: %m");
635 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable
, seat_object_find
, m
);
637 return log_error_errno(r
, "Failed to add seat object vtable: %m");
639 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/login1/seat", seat_node_enumerator
, m
);
641 return log_error_errno(r
, "Failed to add seat enumerator: %m");
643 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/login1/session", "org.freedesktop.login1.Session", session_vtable
, session_object_find
, m
);
645 return log_error_errno(r
, "Failed to add session object vtable: %m");
647 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/login1/session", session_node_enumerator
, m
);
649 return log_error_errno(r
, "Failed to add session enumerator: %m");
651 r
= sd_bus_add_fallback_vtable(m
->bus
, NULL
, "/org/freedesktop/login1/user", "org.freedesktop.login1.User", user_vtable
, user_object_find
, m
);
653 return log_error_errno(r
, "Failed to add user object vtable: %m");
655 r
= sd_bus_add_node_enumerator(m
->bus
, NULL
, "/org/freedesktop/login1/user", user_node_enumerator
, m
);
657 return log_error_errno(r
, "Failed to add user enumerator: %m");
659 r
= sd_bus_match_signal_async(
662 "org.freedesktop.systemd1",
663 "/org/freedesktop/systemd1",
664 "org.freedesktop.systemd1.Manager",
666 match_job_removed
, NULL
, m
);
668 return log_error_errno(r
, "Failed to request match for JobRemoved: %m");
670 r
= sd_bus_match_signal_async(
673 "org.freedesktop.systemd1",
674 "/org/freedesktop/systemd1",
675 "org.freedesktop.systemd1.Manager",
677 match_unit_removed
, NULL
, m
);
679 return log_error_errno(r
, "Failed to request match for UnitRemoved: %m");
681 r
= sd_bus_match_signal_async(
684 "org.freedesktop.systemd1",
686 "org.freedesktop.DBus.Properties",
688 match_properties_changed
, NULL
, m
);
690 return log_error_errno(r
, "Failed to request match for PropertiesChanged: %m");
692 r
= sd_bus_match_signal_async(
695 "org.freedesktop.systemd1",
696 "/org/freedesktop/systemd1",
697 "org.freedesktop.systemd1.Manager",
699 match_reloading
, NULL
, m
);
701 return log_error_errno(r
, "Failed to request match for Reloading: %m");
703 r
= sd_bus_call_method_async(
706 "org.freedesktop.systemd1",
707 "/org/freedesktop/systemd1",
708 "org.freedesktop.systemd1.Manager",
713 return log_error_errno(r
, "Failed to enable subscription: %m");
715 r
= sd_bus_request_name_async(m
->bus
, NULL
, "org.freedesktop.login1", 0, NULL
, NULL
);
717 return log_error_errno(r
, "Failed to request name: %m");
719 r
= sd_bus_attach_event(m
->bus
, m
->event
, SD_EVENT_PRIORITY_NORMAL
);
721 return log_error_errno(r
, "Failed to attach bus to event loop: %m");
726 static int manager_vt_switch(sd_event_source
*src
, const struct signalfd_siginfo
*si
, void *data
) {
728 Session
*active
, *iter
;
731 * We got a VT-switch signal and we have to acknowledge it immediately.
732 * Preferably, we'd just use m->seat0->active->vtfd, but unfortunately,
733 * old user-space might run multiple sessions on a single VT, *sigh*.
734 * Therefore, we have to iterate all sessions and find one with a vtfd
735 * on the requested VT.
736 * As only VTs with active controllers have VT_PROCESS set, our current
737 * notion of the active VT might be wrong (for instance if the switch
738 * happens while we setup VT_PROCESS). Therefore, read the current VT
739 * first and then use s->active->vtnr as reference. Note that this is
740 * not racy, as no further VT-switch can happen as long as we're in
741 * synchronous VT_PROCESS mode.
745 seat_read_active_vt(m
->seat0
);
747 active
= m
->seat0
->active
;
748 if (!active
|| active
->vtnr
< 1) {
749 log_warning("Received VT_PROCESS signal without a registered session on that VT.");
753 if (active
->vtfd
>= 0) {
754 session_leave_vt(active
);
756 LIST_FOREACH(sessions_by_seat
, iter
, m
->seat0
->sessions
) {
757 if (iter
->vtnr
== active
->vtnr
&& iter
->vtfd
>= 0) {
758 session_leave_vt(iter
);
767 static int manager_connect_console(Manager
*m
) {
771 assert(m
->console_active_fd
< 0);
773 /* On certain systems (such as S390, Xen, and containers) /dev/tty0 does not exist (as there is no VC), so
774 * don't fail if we can't open it. */
776 if (access("/dev/tty0", F_OK
) < 0)
779 m
->console_active_fd
= open("/sys/class/tty/tty0/active", O_RDONLY
|O_NOCTTY
|O_CLOEXEC
);
780 if (m
->console_active_fd
< 0) {
782 /* On some systems /dev/tty0 may exist even though /sys/class/tty/tty0 does not. These are broken, but
783 * common. Let's complain but continue anyway. */
784 if (errno
== ENOENT
) {
785 log_warning_errno(errno
, "System has /dev/tty0 but not /sys/class/tty/tty0/active which is broken, ignoring: %m");
789 return log_error_errno(errno
, "Failed to open /sys/class/tty/tty0/active: %m");
792 r
= sd_event_add_io(m
->event
, &m
->console_active_event_source
, m
->console_active_fd
, 0, manager_dispatch_console
, m
);
794 return log_error_errno(r
, "Failed to watch foreground console: %m");
797 * SIGRTMIN is used as global VT-release signal, SIGRTMIN + 1 is used
798 * as VT-acquire signal. We ignore any acquire-events (yes, we still
799 * have to provide a valid signal-number for it!) and acknowledge all
800 * release events immediately.
803 if (SIGRTMIN
+ 1 > SIGRTMAX
) {
804 log_error("Not enough real-time signals available: %u-%u", SIGRTMIN
, SIGRTMAX
);
808 assert_se(ignore_signals(SIGRTMIN
+ 1, -1) >= 0);
809 assert_se(sigprocmask_many(SIG_BLOCK
, NULL
, SIGRTMIN
, -1) >= 0);
811 r
= sd_event_add_signal(m
->event
, NULL
, SIGRTMIN
, manager_vt_switch
, m
);
813 return log_error_errno(r
, "Failed to subscribe to signal: %m");
818 static int manager_connect_udev(Manager
*m
) {
822 assert(!m
->device_seat_monitor
);
823 assert(!m
->device_monitor
);
824 assert(!m
->device_vcsa_monitor
);
825 assert(!m
->device_button_monitor
);
827 r
= sd_device_monitor_new(&m
->device_seat_monitor
);
831 r
= sd_device_monitor_filter_add_match_tag(m
->device_seat_monitor
, "master-of-seat");
835 r
= sd_device_monitor_attach_event(m
->device_seat_monitor
, m
->event
);
839 r
= sd_device_monitor_start(m
->device_seat_monitor
, manager_dispatch_seat_udev
, m
);
843 (void) sd_event_source_set_description(sd_device_monitor_get_event_source(m
->device_seat_monitor
), "logind-seat-monitor");
845 r
= sd_device_monitor_new(&m
->device_monitor
);
849 r
= sd_device_monitor_filter_add_match_subsystem_devtype(m
->device_monitor
, "input", NULL
);
853 r
= sd_device_monitor_filter_add_match_subsystem_devtype(m
->device_monitor
, "graphics", NULL
);
857 r
= sd_device_monitor_filter_add_match_subsystem_devtype(m
->device_monitor
, "drm", NULL
);
861 r
= sd_device_monitor_attach_event(m
->device_monitor
, m
->event
);
865 r
= sd_device_monitor_start(m
->device_monitor
, manager_dispatch_device_udev
, m
);
869 (void) sd_event_source_set_description(sd_device_monitor_get_event_source(m
->device_monitor
), "logind-device-monitor");
871 /* Don't watch keys if nobody cares */
872 if (!manager_all_buttons_ignored(m
)) {
873 r
= sd_device_monitor_new(&m
->device_button_monitor
);
877 r
= sd_device_monitor_filter_add_match_tag(m
->device_button_monitor
, "power-switch");
881 r
= sd_device_monitor_filter_add_match_subsystem_devtype(m
->device_button_monitor
, "input", NULL
);
885 r
= sd_device_monitor_attach_event(m
->device_button_monitor
, m
->event
);
889 r
= sd_device_monitor_start(m
->device_button_monitor
, manager_dispatch_button_udev
, m
);
893 (void) sd_event_source_set_description(sd_device_monitor_get_event_source(m
->device_button_monitor
), "logind-button-monitor");
896 /* Don't bother watching VCSA devices, if nobody cares */
897 if (m
->n_autovts
> 0 && m
->console_active_fd
>= 0) {
899 r
= sd_device_monitor_new(&m
->device_vcsa_monitor
);
903 r
= sd_device_monitor_filter_add_match_subsystem_devtype(m
->device_vcsa_monitor
, "vc", NULL
);
907 r
= sd_device_monitor_attach_event(m
->device_vcsa_monitor
, m
->event
);
911 r
= sd_device_monitor_start(m
->device_vcsa_monitor
, manager_dispatch_vcsa_udev
, m
);
915 (void) sd_event_source_set_description(sd_device_monitor_get_event_source(m
->device_vcsa_monitor
), "logind-vcsa-monitor");
921 static void manager_gc(Manager
*m
, bool drop_not_started
) {
928 while ((seat
= m
->seat_gc_queue
)) {
929 LIST_REMOVE(gc_queue
, m
->seat_gc_queue
, seat
);
930 seat
->in_gc_queue
= false;
932 if (seat_may_gc(seat
, drop_not_started
)) {
933 seat_stop(seat
, false);
938 while ((session
= m
->session_gc_queue
)) {
939 LIST_REMOVE(gc_queue
, m
->session_gc_queue
, session
);
940 session
->in_gc_queue
= false;
942 /* First, if we are not closing yet, initiate stopping */
943 if (session_may_gc(session
, drop_not_started
) &&
944 session_get_state(session
) != SESSION_CLOSING
)
945 (void) session_stop(session
, false);
947 /* Normally, this should make the session referenced
948 * again, if it doesn't then let's get rid of it
950 if (session_may_gc(session
, drop_not_started
)) {
951 (void) session_finalize(session
);
952 session_free(session
);
956 while ((user
= m
->user_gc_queue
)) {
957 LIST_REMOVE(gc_queue
, m
->user_gc_queue
, user
);
958 user
->in_gc_queue
= false;
960 /* First step: queue stop jobs */
961 if (user_may_gc(user
, drop_not_started
))
962 (void) user_stop(user
, false);
964 /* Second step: finalize user */
965 if (user_may_gc(user
, drop_not_started
)) {
966 (void) user_finalize(user
);
972 static int manager_dispatch_idle_action(sd_event_source
*s
, uint64_t t
, void *userdata
) {
973 Manager
*m
= userdata
;
974 struct dual_timestamp since
;
980 if (m
->idle_action
== HANDLE_IGNORE
||
981 m
->idle_action_usec
<= 0)
984 n
= now(CLOCK_MONOTONIC
);
986 r
= manager_get_idle_hint(m
, &since
);
988 /* Not idle. Let's check if after a timeout it might be idle then. */
989 elapse
= n
+ m
->idle_action_usec
;
991 /* Idle! Let's see if it's time to do something, or if
992 * we shall sleep for longer. */
994 if (n
>= since
.monotonic
+ m
->idle_action_usec
&&
995 (m
->idle_action_not_before_usec
<= 0 || n
>= m
->idle_action_not_before_usec
+ m
->idle_action_usec
)) {
996 log_info("System idle. Taking action.");
998 manager_handle_action(m
, 0, m
->idle_action
, false, false);
999 m
->idle_action_not_before_usec
= n
;
1002 elapse
= MAX(since
.monotonic
, m
->idle_action_not_before_usec
) + m
->idle_action_usec
;
1005 if (!m
->idle_action_event_source
) {
1007 r
= sd_event_add_time(
1009 &m
->idle_action_event_source
,
1011 elapse
, USEC_PER_SEC
*30,
1012 manager_dispatch_idle_action
, m
);
1014 return log_error_errno(r
, "Failed to add idle event source: %m");
1016 r
= sd_event_source_set_priority(m
->idle_action_event_source
, SD_EVENT_PRIORITY_IDLE
+10);
1018 return log_error_errno(r
, "Failed to set idle event source priority: %m");
1020 r
= sd_event_source_set_time(m
->idle_action_event_source
, elapse
);
1022 return log_error_errno(r
, "Failed to set idle event timer: %m");
1024 r
= sd_event_source_set_enabled(m
->idle_action_event_source
, SD_EVENT_ONESHOT
);
1026 return log_error_errno(r
, "Failed to enable idle event timer: %m");
1032 static int manager_dispatch_reload_signal(sd_event_source
*s
, const struct signalfd_siginfo
*si
, void *userdata
) {
1033 Manager
*m
= userdata
;
1036 manager_reset_config(m
);
1037 r
= manager_parse_config_file(m
);
1039 log_warning_errno(r
, "Failed to parse config file, using defaults: %m");
1041 log_info("Config file reloaded.");
1046 static int manager_startup(Manager
*m
) {
1052 Inhibitor
*inhibitor
;
1057 r
= sd_event_add_signal(m
->event
, NULL
, SIGHUP
, manager_dispatch_reload_signal
, m
);
1059 return log_error_errno(r
, "Failed to register SIGHUP handler: %m");
1061 /* Connect to utmp */
1062 manager_connect_utmp(m
);
1064 /* Connect to console */
1065 r
= manager_connect_console(m
);
1069 /* Connect to udev */
1070 r
= manager_connect_udev(m
);
1072 return log_error_errno(r
, "Failed to create udev watchers: %m");
1074 /* Connect to the bus */
1075 r
= manager_connect_bus(m
);
1079 /* Instantiate magic seat 0 */
1080 r
= manager_add_seat(m
, "seat0", &m
->seat0
);
1082 return log_error_errno(r
, "Failed to add seat0: %m");
1084 r
= manager_set_lid_switch_ignore(m
, 0 + m
->holdoff_timeout_usec
);
1086 log_warning_errno(r
, "Failed to set up lid switch ignore event source: %m");
1088 /* Deserialize state */
1089 r
= manager_enumerate_devices(m
);
1091 log_warning_errno(r
, "Device enumeration failed: %m");
1093 r
= manager_enumerate_seats(m
);
1095 log_warning_errno(r
, "Seat enumeration failed: %m");
1097 r
= manager_enumerate_users(m
);
1099 log_warning_errno(r
, "User enumeration failed: %m");
1101 r
= manager_enumerate_sessions(m
);
1103 log_warning_errno(r
, "Session enumeration failed: %m");
1105 r
= manager_enumerate_inhibitors(m
);
1107 log_warning_errno(r
, "Inhibitor enumeration failed: %m");
1109 r
= manager_enumerate_buttons(m
);
1111 log_warning_errno(r
, "Button enumeration failed: %m");
1113 /* Remove stale objects before we start them */
1114 manager_gc(m
, false);
1116 /* Reserve the special reserved VT */
1117 manager_reserve_vt(m
);
1119 /* Read in utmp if it exists */
1120 manager_read_utmp(m
);
1122 /* And start everything */
1123 HASHMAP_FOREACH(seat
, m
->seats
, i
)
1124 (void) seat_start(seat
);
1126 HASHMAP_FOREACH(user
, m
->users
, i
)
1127 (void) user_start(user
);
1129 HASHMAP_FOREACH(session
, m
->sessions
, i
)
1130 (void) session_start(session
, NULL
, NULL
);
1132 HASHMAP_FOREACH(inhibitor
, m
->inhibitors
, i
)
1133 inhibitor_start(inhibitor
);
1135 HASHMAP_FOREACH(button
, m
->buttons
, i
)
1136 button_check_switches(button
);
1138 manager_dispatch_idle_action(NULL
, 0, m
);
1143 static int manager_run(Manager
*m
) {
1149 r
= sd_event_get_state(m
->event
);
1152 if (r
== SD_EVENT_FINISHED
)
1155 manager_gc(m
, true);
1157 r
= manager_dispatch_delayed(m
, false);
1163 r
= sd_event_run(m
->event
, (uint64_t) -1);
1169 int main(int argc
, char *argv
[]) {
1170 _cleanup_(manager_unrefp
) Manager
*m
= NULL
;
1173 log_set_target(LOG_TARGET_AUTO
);
1174 log_set_facility(LOG_AUTH
);
1175 log_parse_environment();
1181 log_error("This program takes no arguments.");
1186 r
= mac_selinux_init();
1188 log_error_errno(r
, "Could not initialize labelling: %m");
1192 /* Always create the directories people can create inotify watches in. Note that some applications might check
1193 * for the existence of /run/systemd/seats/ to determine whether logind is available, so please always make
1194 * sure these directories are created early on and unconditionally. */
1195 (void) mkdir_label("/run/systemd/seats", 0755);
1196 (void) mkdir_label("/run/systemd/users", 0755);
1197 (void) mkdir_label("/run/systemd/sessions", 0755);
1199 assert_se(sigprocmask_many(SIG_BLOCK
, NULL
, SIGHUP
, SIGTERM
, SIGINT
, -1) >= 0);
1201 r
= manager_new(&m
);
1203 log_error_errno(r
, "Failed to allocate manager object: %m");
1207 (void) manager_parse_config_file(m
);
1209 r
= manager_startup(m
);
1211 log_error_errno(r
, "Failed to fully start up daemon: %m");
1215 log_debug("systemd-logind running as pid "PID_FMT
, getpid_cached());
1217 (void) sd_notify(false,
1219 "STATUS=Processing requests...");
1223 log_debug("systemd-logind stopped as pid "PID_FMT
, getpid_cached());
1225 (void) sd_notify(false,
1227 "STATUS=Shutting down...");
1230 return r
< 0 ? EXIT_FAILURE
: EXIT_SUCCESS
;