]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/login/logind-session.c
cbf035f706e206931aaeffa1edb74c69606be1bd
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/>.
26 #include <sys/ioctl.h>
29 #include "sd-messages.h"
31 #include "alloc-util.h"
32 #include "audit-util.h"
33 #include "bus-error.h"
38 #include "formats-util.h"
40 #include "logind-session.h"
42 #include "parse-util.h"
43 #include "path-util.h"
44 #include "string-table.h"
45 #include "terminal-util.h"
46 #include "user-util.h"
49 #define RELEASE_USEC (20*USEC_PER_SEC)
51 static void session_remove_fifo(Session
*s
);
53 Session
* session_new(Manager
*m
, const char *id
) {
58 assert(session_id_valid(id
));
64 s
->state_file
= strappend("/run/systemd/sessions/", id
);
68 s
->devices
= hashmap_new(&devt_hash_ops
);
74 s
->id
= basename(s
->state_file
);
76 if (hashmap_put(m
->sessions
, s
->id
, s
) < 0) {
77 hashmap_free(s
->devices
);
89 void session_free(Session
*s
) {
95 LIST_REMOVE(gc_queue
, s
->manager
->session_gc_queue
, s
);
97 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
99 session_remove_fifo(s
);
101 session_drop_controller(s
);
103 while ((sd
= hashmap_first(s
->devices
)))
104 session_device_free(sd
);
106 hashmap_free(s
->devices
);
109 LIST_REMOVE(sessions_by_user
, s
->user
->sessions
, s
);
111 if (s
->user
->display
== s
)
112 s
->user
->display
= NULL
;
116 if (s
->seat
->active
== s
)
117 s
->seat
->active
= NULL
;
118 if (s
->seat
->pending_switch
== s
)
119 s
->seat
->pending_switch
= NULL
;
121 seat_evict_position(s
->seat
, s
);
122 LIST_REMOVE(sessions_by_seat
, s
->seat
->sessions
, s
);
126 hashmap_remove(s
->manager
->session_units
, s
->scope
);
132 sd_bus_message_unref(s
->create_message
);
136 free(s
->remote_host
);
137 free(s
->remote_user
);
141 hashmap_remove(s
->manager
->sessions
, s
->id
);
147 void session_set_user(Session
*s
, User
*u
) {
152 LIST_PREPEND(sessions_by_user
, u
->sessions
, s
);
155 int session_save(Session
*s
) {
156 _cleanup_free_
char *temp_path
= NULL
;
157 _cleanup_fclose_
FILE *f
= NULL
;
168 r
= mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0);
172 r
= fopen_temporary(s
->state_file
, &f
, &temp_path
);
178 fchmod(fileno(f
), 0644);
181 "# This is private data. Do not parse.\n"
189 session_is_active(s
),
190 session_state_to_string(session_get_state(s
)),
194 fprintf(f
, "TYPE=%s\n", session_type_to_string(s
->type
));
197 fprintf(f
, "CLASS=%s\n", session_class_to_string(s
->class));
200 fprintf(f
, "SCOPE=%s\n", s
->scope
);
202 fprintf(f
, "SCOPE_JOB=%s\n", s
->scope_job
);
205 fprintf(f
, "FIFO=%s\n", s
->fifo_path
);
208 fprintf(f
, "SEAT=%s\n", s
->seat
->id
);
211 fprintf(f
, "TTY=%s\n", s
->tty
);
214 fprintf(f
, "DISPLAY=%s\n", s
->display
);
216 if (s
->remote_host
) {
217 _cleanup_free_
char *escaped
;
219 escaped
= cescape(s
->remote_host
);
225 fprintf(f
, "REMOTE_HOST=%s\n", escaped
);
228 if (s
->remote_user
) {
229 _cleanup_free_
char *escaped
;
231 escaped
= cescape(s
->remote_user
);
237 fprintf(f
, "REMOTE_USER=%s\n", escaped
);
241 _cleanup_free_
char *escaped
;
243 escaped
= cescape(s
->service
);
249 fprintf(f
, "SERVICE=%s\n", escaped
);
253 _cleanup_free_
char *escaped
;
256 escaped
= cescape(s
->desktop
);
262 fprintf(f
, "DESKTOP=%s\n", escaped
);
265 if (s
->seat
&& seat_has_vts(s
->seat
))
266 fprintf(f
, "VTNR=%u\n", s
->vtnr
);
269 fprintf(f
, "POSITION=%u\n", s
->position
);
272 fprintf(f
, "LEADER="PID_FMT
"\n", s
->leader
);
275 fprintf(f
, "AUDIT=%"PRIu32
"\n", s
->audit_id
);
277 if (dual_timestamp_is_set(&s
->timestamp
))
279 "REALTIME="USEC_FMT
"\n"
280 "MONOTONIC="USEC_FMT
"\n",
281 s
->timestamp
.realtime
,
282 s
->timestamp
.monotonic
);
285 fprintf(f
, "CONTROLLER=%s\n", s
->controller
);
287 r
= fflush_and_check(f
);
291 if (rename(temp_path
, s
->state_file
) < 0) {
299 (void) unlink(s
->state_file
);
302 (void) unlink(temp_path
);
304 return log_error_errno(r
, "Failed to save session data %s: %m", s
->state_file
);
308 int session_load(Session
*s
) {
309 _cleanup_free_
char *remote
= NULL
,
326 r
= parse_env_file(s
->state_file
, NEWLINE
,
329 "SCOPE_JOB", &s
->scope_job
,
330 "FIFO", &s
->fifo_path
,
333 "DISPLAY", &s
->display
,
334 "REMOTE_HOST", &s
->remote_host
,
335 "REMOTE_USER", &s
->remote_user
,
336 "SERVICE", &s
->service
,
337 "DESKTOP", &s
->desktop
,
340 "POSITION", &position
,
345 "REALTIME", &realtime
,
346 "MONOTONIC", &monotonic
,
347 "CONTROLLER", &controller
,
351 return log_error_errno(r
, "Failed to read %s: %m", s
->state_file
);
358 log_error("UID not specified for session %s", s
->id
);
362 r
= parse_uid(uid
, &u
);
364 log_error("Failed to parse UID value %s for session %s.", uid
, s
->id
);
368 user
= hashmap_get(s
->manager
->users
, UID_TO_PTR(u
));
370 log_error("User of session %s not known.", s
->id
);
374 session_set_user(s
, user
);
378 k
= parse_boolean(remote
);
384 safe_atou(vtnr
, &s
->vtnr
);
386 if (seat
&& !s
->seat
) {
389 o
= hashmap_get(s
->manager
->seats
, seat
);
391 r
= seat_attach_session(o
, s
);
393 log_error("Cannot attach session %s to seat %s", s
->id
, seat
);
396 if (!s
->seat
|| !seat_has_vts(s
->seat
))
399 if (position
&& s
->seat
) {
402 safe_atou(position
, &npos
);
403 seat_claim_position(s
->seat
, s
, npos
);
407 k
= parse_pid(leader
, &s
->leader
);
409 audit_session_from_pid(s
->leader
, &s
->audit_id
);
415 t
= session_type_from_string(type
);
423 c
= session_class_from_string(class);
428 if (state
&& streq(state
, "closing"))
434 /* If we open an unopened pipe for reading we will not
435 get an EOF. to trigger an EOF we hence open it for
436 writing, but close it right away which then will
437 trigger the EOF. This will happen immediately if no
438 other process has the FIFO open for writing, i. e.
439 when the session died before logind (re)started. */
441 fd
= session_create_fifo(s
);
446 timestamp_deserialize(realtime
, &s
->timestamp
.realtime
);
448 timestamp_deserialize(monotonic
, &s
->timestamp
.monotonic
);
451 if (bus_name_has_owner(s
->manager
->bus
, controller
, NULL
) > 0)
452 session_set_controller(s
, controller
, false);
454 session_restore_vt(s
);
460 int session_activate(Session
*s
) {
461 unsigned int num_pending
;
469 if (s
->seat
->active
== s
)
472 /* on seats with VTs, we let VTs manage session-switching */
473 if (seat_has_vts(s
->seat
)) {
477 return chvt(s
->vtnr
);
480 /* On seats without VTs, we implement session-switching in logind. We
481 * try to pause all session-devices and wait until the session
482 * controller acknowledged them. Once all devices are asleep, we simply
483 * switch the active session and be done.
484 * We save the session we want to switch to in seat->pending_switch and
485 * seat_complete_switch() will perform the final switch. */
487 s
->seat
->pending_switch
= s
;
489 /* if no devices are running, immediately perform the session switch */
490 num_pending
= session_device_try_pause_all(s
);
492 seat_complete_switch(s
->seat
);
497 static int session_start_scope(Session
*s
) {
504 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
505 char *scope
, *job
= NULL
;
506 const char *description
;
508 scope
= strjoin("session-", s
->id
, ".scope", NULL
);
512 description
= strjoina("Session ", s
->id
, " of user ", s
->user
->name
);
514 r
= manager_start_scope(
520 "systemd-logind.service",
521 "systemd-user-sessions.service",
522 (uint64_t) -1, /* disable TasksMax= for the scope, rely on the slice setting for it */
526 log_error_errno(r
, "Failed to start session scope %s: %s", scope
, bus_error_message(&error
, r
));
538 (void) hashmap_put(s
->manager
->session_units
, s
->scope
, s
);
543 int session_start(Session
*s
) {
554 r
= user_start(s
->user
);
559 r
= session_start_scope(s
);
563 log_struct(s
->class == SESSION_BACKGROUND
? LOG_DEBUG
: LOG_INFO
,
564 LOG_MESSAGE_ID(SD_MESSAGE_SESSION_START
),
565 "SESSION_ID=%s", s
->id
,
566 "USER_ID=%s", s
->user
->name
,
567 "LEADER="PID_FMT
, s
->leader
,
568 LOG_MESSAGE("New session %s of user %s.", s
->id
, s
->user
->name
),
571 if (!dual_timestamp_is_set(&s
->timestamp
))
572 dual_timestamp_get(&s
->timestamp
);
575 seat_read_active_vt(s
->seat
);
579 user_elect_display(s
->user
);
588 session_send_signal(s
, true);
589 user_send_changed(s
->user
, "Sessions", "Display", NULL
);
591 if (s
->seat
->active
== s
)
592 seat_send_changed(s
->seat
, "Sessions", "ActiveSession", NULL
);
594 seat_send_changed(s
->seat
, "Sessions", NULL
);
600 static int session_stop_scope(Session
*s
, bool force
) {
601 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
609 /* Let's always abandon the scope first. This tells systemd that we are not interested anymore, and everything
610 * that is left in the scope is "left-over". Informing systemd about this has the benefit that it will log
611 * when killing any processes left after this point. */
612 r
= manager_abandon_scope(s
->manager
, s
->scope
, &error
);
614 log_warning_errno(r
, "Failed to abandon session scope, ignoring: %s", bus_error_message(&error
, r
));
616 /* Optionally, let's kill everything that's left now. */
617 if (force
|| manager_shall_kill(s
->manager
, s
->user
->name
)) {
620 r
= manager_stop_unit(s
->manager
, s
->scope
, &error
, &job
);
622 return log_error_errno(r
, "Failed to stop session scope: %s", bus_error_message(&error
, r
));
627 s
->scope_job
= mfree(s
->scope_job
);
632 int session_stop(Session
*s
, bool force
) {
640 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
643 seat_evict_position(s
->seat
, s
);
645 /* We are going down, don't care about FIFOs anymore */
646 session_remove_fifo(s
);
649 r
= session_stop_scope(s
, force
);
653 user_elect_display(s
->user
);
661 int session_finalize(Session
*s
) {
670 log_struct(s
->class == SESSION_BACKGROUND
? LOG_DEBUG
: LOG_INFO
,
671 LOG_MESSAGE_ID(SD_MESSAGE_SESSION_STOP
),
672 "SESSION_ID=%s", s
->id
,
673 "USER_ID=%s", s
->user
->name
,
674 "LEADER="PID_FMT
, s
->leader
,
675 LOG_MESSAGE("Removed session %s.", s
->id
),
678 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
681 seat_evict_position(s
->seat
, s
);
683 /* Kill session devices */
684 while ((sd
= hashmap_first(s
->devices
)))
685 session_device_free(sd
);
687 (void) unlink(s
->state_file
);
688 session_add_to_gc_queue(s
);
689 user_add_to_gc_queue(s
->user
);
692 session_send_signal(s
, false);
697 if (s
->seat
->active
== s
)
698 seat_set_active(s
->seat
, NULL
);
701 seat_send_changed(s
->seat
, "Sessions", NULL
);
705 user_send_changed(s
->user
, "Sessions", "Display", NULL
);
710 static int release_timeout_callback(sd_event_source
*es
, uint64_t usec
, void *userdata
) {
711 Session
*s
= userdata
;
716 session_stop(s
, false);
720 int session_release(Session
*s
) {
723 if (!s
->started
|| s
->stopping
)
726 if (s
->timer_event_source
)
729 return sd_event_add_time(s
->manager
->event
,
730 &s
->timer_event_source
,
732 now(CLOCK_MONOTONIC
) + RELEASE_USEC
, 0,
733 release_timeout_callback
, s
);
736 bool session_is_active(Session
*s
) {
742 return s
->seat
->active
== s
;
745 static int get_tty_atime(const char *tty
, usec_t
*atime
) {
746 _cleanup_free_
char *p
= NULL
;
752 if (!path_is_absolute(tty
)) {
753 p
= strappend("/dev/", tty
);
758 } else if (!path_startswith(tty
, "/dev/"))
761 if (lstat(tty
, &st
) < 0)
764 *atime
= timespec_load(&st
.st_atim
);
768 static int get_process_ctty_atime(pid_t pid
, usec_t
*atime
) {
769 _cleanup_free_
char *p
= NULL
;
775 r
= get_ctty(pid
, NULL
, &p
);
779 return get_tty_atime(p
, atime
);
782 int session_get_idle_hint(Session
*s
, dual_timestamp
*t
) {
788 /* Explicit idle hint is set */
791 *t
= s
->idle_hint_timestamp
;
796 /* Graphical sessions should really implement a real
798 if (SESSION_TYPE_IS_GRAPHICAL(s
->type
))
801 /* For sessions with an explicitly configured tty, let's check
804 r
= get_tty_atime(s
->tty
, &atime
);
809 /* For sessions with a leader but no explicitly configured
810 * tty, let's check the controlling tty of the leader */
812 r
= get_process_ctty_atime(s
->leader
, &atime
);
819 *t
= s
->idle_hint_timestamp
;
825 dual_timestamp_from_realtime(t
, atime
);
827 n
= now(CLOCK_REALTIME
);
829 if (s
->manager
->idle_action_usec
<= 0)
832 return atime
+ s
->manager
->idle_action_usec
<= n
;
835 void session_set_idle_hint(Session
*s
, bool b
) {
838 if (s
->idle_hint
== b
)
842 dual_timestamp_get(&s
->idle_hint_timestamp
);
844 session_send_changed(s
, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL
);
847 seat_send_changed(s
->seat
, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL
);
849 user_send_changed(s
->user
, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL
);
850 manager_send_changed(s
->manager
, "IdleHint", "IdleSinceHint", "IdleSinceHintMonotonic", NULL
);
853 int session_get_locked_hint(Session
*s
) {
856 return s
->locked_hint
;
859 void session_set_locked_hint(Session
*s
, bool b
) {
862 if (s
->locked_hint
== b
)
867 session_send_changed(s
, "LockedHint", NULL
);
870 static int session_dispatch_fifo(sd_event_source
*es
, int fd
, uint32_t revents
, void *userdata
) {
871 Session
*s
= userdata
;
874 assert(s
->fifo_fd
== fd
);
876 /* EOF on the FIFO means the session died abnormally. */
878 session_remove_fifo(s
);
879 session_stop(s
, false);
884 int session_create_fifo(Session
*s
) {
891 r
= mkdir_safe_label("/run/systemd/sessions", 0755, 0, 0);
895 if (asprintf(&s
->fifo_path
, "/run/systemd/sessions/%s.ref", s
->id
) < 0)
898 if (mkfifo(s
->fifo_path
, 0600) < 0 && errno
!= EEXIST
)
902 /* Open reading side */
903 if (s
->fifo_fd
< 0) {
904 s
->fifo_fd
= open(s
->fifo_path
, O_RDONLY
|O_CLOEXEC
|O_NDELAY
);
910 if (!s
->fifo_event_source
) {
911 r
= sd_event_add_io(s
->manager
->event
, &s
->fifo_event_source
, s
->fifo_fd
, 0, session_dispatch_fifo
, s
);
915 /* Let's make sure we noticed dead sessions before we process new bus requests (which might create new
917 r
= sd_event_source_set_priority(s
->fifo_event_source
, SD_EVENT_PRIORITY_NORMAL
-10);
922 /* Open writing side */
923 r
= open(s
->fifo_path
, O_WRONLY
|O_CLOEXEC
|O_NDELAY
);
930 static void session_remove_fifo(Session
*s
) {
933 s
->fifo_event_source
= sd_event_source_unref(s
->fifo_event_source
);
934 s
->fifo_fd
= safe_close(s
->fifo_fd
);
937 unlink(s
->fifo_path
);
938 s
->fifo_path
= mfree(s
->fifo_path
);
942 bool session_check_gc(Session
*s
, bool drop_not_started
) {
945 if (drop_not_started
&& !s
->started
)
951 if (s
->fifo_fd
>= 0) {
952 if (pipe_eof(s
->fifo_fd
) <= 0)
956 if (s
->scope_job
&& manager_job_is_active(s
->manager
, s
->scope_job
))
959 if (s
->scope
&& manager_unit_is_active(s
->manager
, s
->scope
))
965 void session_add_to_gc_queue(Session
*s
) {
971 LIST_PREPEND(gc_queue
, s
->manager
->session_gc_queue
, s
);
972 s
->in_gc_queue
= true;
975 SessionState
session_get_state(Session
*s
) {
978 /* always check closing first */
979 if (s
->stopping
|| s
->timer_event_source
)
980 return SESSION_CLOSING
;
982 if (s
->scope_job
|| s
->fifo_fd
< 0)
983 return SESSION_OPENING
;
985 if (session_is_active(s
))
986 return SESSION_ACTIVE
;
988 return SESSION_ONLINE
;
991 int session_kill(Session
*s
, KillWho who
, int signo
) {
997 return manager_kill_unit(s
->manager
, s
->scope
, who
, signo
, NULL
);
1000 static int session_open_vt(Session
*s
) {
1001 char path
[sizeof("/dev/tty") + DECIMAL_STR_MAX(s
->vtnr
)];
1009 sprintf(path
, "/dev/tty%u", s
->vtnr
);
1010 s
->vtfd
= open_terminal(path
, O_RDWR
| O_CLOEXEC
| O_NONBLOCK
| O_NOCTTY
);
1012 return log_error_errno(s
->vtfd
, "cannot open VT %s of session %s: %m", path
, s
->id
);
1017 int session_prepare_vt(Session
*s
) {
1019 struct vt_mode mode
= { 0 };
1024 vt
= session_open_vt(s
);
1028 r
= fchown(vt
, s
->user
->uid
, -1);
1030 r
= log_error_errno(errno
,
1031 "Cannot change owner of /dev/tty%u: %m",
1036 r
= ioctl(vt
, KDSKBMODE
, K_OFF
);
1038 r
= log_error_errno(errno
,
1039 "Cannot set K_OFF on /dev/tty%u: %m",
1044 r
= ioctl(vt
, KDSETMODE
, KD_GRAPHICS
);
1046 r
= log_error_errno(errno
,
1047 "Cannot set KD_GRAPHICS on /dev/tty%u: %m",
1052 /* Oh, thanks to the VT layer, VT_AUTO does not work with KD_GRAPHICS.
1053 * So we need a dummy handler here which just acknowledges *all* VT
1054 * switch requests. */
1055 mode
.mode
= VT_PROCESS
;
1056 mode
.relsig
= SIGRTMIN
;
1057 mode
.acqsig
= SIGRTMIN
+ 1;
1058 r
= ioctl(vt
, VT_SETMODE
, &mode
);
1060 r
= log_error_errno(errno
,
1061 "Cannot set VT_PROCESS on /dev/tty%u: %m",
1069 session_restore_vt(s
);
1073 void session_restore_vt(Session
*s
) {
1075 static const struct vt_mode mode
= {
1079 _cleanup_free_
char *utf8
= NULL
;
1082 /* We need to get a fresh handle to the virtual terminal,
1083 * since the old file-descriptor is potentially in a hung-up
1084 * state after the controlling process exited; we do a
1085 * little dance to avoid having the terminal be available
1086 * for reuse before we've cleaned it up.
1091 vt
= session_open_vt(s
);
1097 (void) ioctl(vt
, KDSETMODE
, KD_TEXT
);
1099 if (read_one_line_file("/sys/module/vt/parameters/default_utf8", &utf8
) >= 0 && *utf8
== '1')
1104 (void) ioctl(vt
, KDSKBMODE
, kb
);
1106 (void) ioctl(vt
, VT_SETMODE
, &mode
);
1107 (void) fchown(vt
, 0, (gid_t
) -1);
1109 s
->vtfd
= safe_close(s
->vtfd
);
1112 void session_leave_vt(Session
*s
) {
1117 /* This is called whenever we get a VT-switch signal from the kernel.
1118 * We acknowledge all of them unconditionally. Note that session are
1119 * free to overwrite those handlers and we only register them for
1120 * sessions with controllers. Legacy sessions are not affected.
1121 * However, if we switch from a non-legacy to a legacy session, we must
1122 * make sure to pause all device before acknowledging the switch. We
1123 * process the real switch only after we are notified via sysfs, so the
1124 * legacy session might have already started using the devices. If we
1125 * don't pause the devices before the switch, we might confuse the
1126 * session we switch to. */
1131 session_device_pause_all(s
);
1132 r
= ioctl(s
->vtfd
, VT_RELDISP
, 1);
1134 log_debug_errno(errno
, "Cannot release VT of session %s: %m", s
->id
);
1137 bool session_is_controller(Session
*s
, const char *sender
) {
1140 return streq_ptr(s
->controller
, sender
);
1143 static void session_release_controller(Session
*s
, bool notify
) {
1144 _cleanup_free_
char *name
= NULL
;
1150 name
= s
->controller
;
1152 /* By resetting the controller before releasing the devices, we won't
1153 * send notification signals. This avoids sending useless notifications
1154 * if the controller is released on disconnects. */
1156 s
->controller
= NULL
;
1158 while ((sd
= hashmap_first(s
->devices
)))
1159 session_device_free(sd
);
1161 s
->controller
= NULL
;
1162 s
->track
= sd_bus_track_unref(s
->track
);
1165 static int on_bus_track(sd_bus_track
*track
, void *userdata
) {
1166 Session
*s
= userdata
;
1171 session_drop_controller(s
);
1176 int session_set_controller(Session
*s
, const char *sender
, bool force
) {
1177 _cleanup_free_
char *name
= NULL
;
1183 if (session_is_controller(s
, sender
))
1185 if (s
->controller
&& !force
)
1188 name
= strdup(sender
);
1192 s
->track
= sd_bus_track_unref(s
->track
);
1193 r
= sd_bus_track_new(s
->manager
->bus
, &s
->track
, on_bus_track
, s
);
1197 r
= sd_bus_track_add_name(s
->track
, name
);
1201 /* When setting a session controller, we forcibly mute the VT and set
1202 * it into graphics-mode. Applications can override that by changing
1203 * VT state after calling TakeControl(). However, this serves as a good
1204 * default and well-behaving controllers can now ignore VTs entirely.
1205 * Note that we reset the VT on ReleaseControl() and if the controller
1207 * If logind crashes/restarts, we restore the controller during restart
1208 * or reset the VT in case it crashed/exited, too. */
1209 r
= session_prepare_vt(s
);
1211 s
->track
= sd_bus_track_unref(s
->track
);
1215 session_release_controller(s
, true);
1216 s
->controller
= name
;
1223 void session_drop_controller(Session
*s
) {
1229 s
->track
= sd_bus_track_unref(s
->track
);
1230 session_release_controller(s
, false);
1232 session_restore_vt(s
);
1235 static const char* const session_state_table
[_SESSION_STATE_MAX
] = {
1236 [SESSION_OPENING
] = "opening",
1237 [SESSION_ONLINE
] = "online",
1238 [SESSION_ACTIVE
] = "active",
1239 [SESSION_CLOSING
] = "closing"
1242 DEFINE_STRING_TABLE_LOOKUP(session_state
, SessionState
);
1244 static const char* const session_type_table
[_SESSION_TYPE_MAX
] = {
1245 [SESSION_UNSPECIFIED
] = "unspecified",
1246 [SESSION_TTY
] = "tty",
1247 [SESSION_X11
] = "x11",
1248 [SESSION_WAYLAND
] = "wayland",
1249 [SESSION_MIR
] = "mir",
1250 [SESSION_WEB
] = "web",
1253 DEFINE_STRING_TABLE_LOOKUP(session_type
, SessionType
);
1255 static const char* const session_class_table
[_SESSION_CLASS_MAX
] = {
1256 [SESSION_USER
] = "user",
1257 [SESSION_GREETER
] = "greeter",
1258 [SESSION_LOCK_SCREEN
] = "lock-screen",
1259 [SESSION_BACKGROUND
] = "background"
1262 DEFINE_STRING_TABLE_LOOKUP(session_class
, SessionClass
);
1264 static const char* const kill_who_table
[_KILL_WHO_MAX
] = {
1265 [KILL_LEADER
] = "leader",
1269 DEFINE_STRING_TABLE_LOOKUP(kill_who
, KillWho
);