1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2011 Lennart Poettering
11 #include "alloc-util.h"
12 #include "bus-common-errors.h"
13 #include "bus-label.h"
16 #include "logind-session-device.h"
17 #include "logind-session.h"
19 #include "signal-util.h"
23 static int property_get_user(
26 const char *interface,
28 sd_bus_message *reply,
30 sd_bus_error *error) {
32 _cleanup_free_ char *p = NULL;
33 Session *s = userdata;
39 p = user_bus_path(s->user);
43 return sd_bus_message_append(reply, "(uo)", (uint32_t) s->user->uid, p);
46 static int property_get_name(
49 const char *interface,
51 sd_bus_message *reply,
53 sd_bus_error *error) {
55 Session *s = userdata;
61 return sd_bus_message_append(reply, "s", s->user->name);
64 static int property_get_seat(
67 const char *interface,
69 sd_bus_message *reply,
71 sd_bus_error *error) {
73 _cleanup_free_ char *p = NULL;
74 Session *s = userdata;
80 p = s->seat ? seat_bus_path(s->seat) : strdup("/");
84 return sd_bus_message_append(reply, "(so)", s->seat ? s->seat->id : "", p);
87 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, session_type, SessionType);
88 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_class, session_class, SessionClass);
89 static BUS_DEFINE_PROPERTY_GET(property_get_active, "b", Session, session_is_active);
90 static BUS_DEFINE_PROPERTY_GET2(property_get_state, "s", Session, session_get_state, session_state_to_string);
92 static int property_get_idle_hint(
95 const char *interface,
97 sd_bus_message *reply,
99 sd_bus_error *error) {
101 Session *s = userdata;
107 return sd_bus_message_append(reply, "b", session_get_idle_hint(s, NULL) > 0);
110 static int property_get_idle_since_hint(
113 const char *interface,
114 const char *property,
115 sd_bus_message *reply,
117 sd_bus_error *error) {
119 Session *s = userdata;
120 dual_timestamp t = DUAL_TIMESTAMP_NULL;
128 r = session_get_idle_hint(s, &t);
132 u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
134 return sd_bus_message_append(reply, "t", u);
137 static int property_get_locked_hint(
140 const char *interface,
141 const char *property,
142 sd_bus_message *reply,
144 sd_bus_error *error) {
146 Session *s = userdata;
152 return sd_bus_message_append(reply, "b", session_get_locked_hint(s) > 0);
155 int bus_session_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
156 Session *s = userdata;
162 r = bus_verify_polkit_async(
165 "org.freedesktop.login1.manage",
169 &s->manager->polkit_registry,
174 return 1; /* Will call us back */
176 r = session_stop(s, true);
180 return sd_bus_reply_method_return(message, NULL);
183 int bus_session_method_activate(sd_bus_message *message, void *userdata, sd_bus_error *error) {
184 Session *s = userdata;
190 r = session_activate(s);
194 return sd_bus_reply_method_return(message, NULL);
197 int bus_session_method_lock(sd_bus_message *message, void *userdata, sd_bus_error *error) {
198 Session *s = userdata;
204 r = bus_verify_polkit_async(
207 "org.freedesktop.login1.lock-sessions",
211 &s->manager->polkit_registry,
216 return 1; /* Will call us back */
218 r = session_send_lock(s, strstr(sd_bus_message_get_member(message), "Lock"));
222 return sd_bus_reply_method_return(message, NULL);
225 static int method_set_idle_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) {
226 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
227 Session *s = userdata;
234 r = sd_bus_message_read(message, "b", &b);
238 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
242 r = sd_bus_creds_get_euid(creds, &uid);
246 if (uid != 0 && uid != s->user->uid)
247 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set idle hint");
249 session_set_idle_hint(s, b);
251 return sd_bus_reply_method_return(message, NULL);
254 static int method_set_locked_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) {
255 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
256 Session *s = userdata;
263 r = sd_bus_message_read(message, "b", &b);
267 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
271 r = sd_bus_creds_get_euid(creds, &uid);
275 if (uid != 0 && uid != s->user->uid)
276 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set locked hint");
278 session_set_locked_hint(s, b);
280 return sd_bus_reply_method_return(message, NULL);
283 int bus_session_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) {
284 Session *s = userdata;
293 r = sd_bus_message_read(message, "si", &swho, &signo);
300 who = kill_who_from_string(swho);
302 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho);
305 if (!SIGNAL_VALID(signo))
306 return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo);
308 r = bus_verify_polkit_async(
311 "org.freedesktop.login1.manage",
315 &s->manager->polkit_registry,
320 return 1; /* Will call us back */
322 r = session_kill(s, who, signo);
326 return sd_bus_reply_method_return(message, NULL);
329 static int method_take_control(sd_bus_message *message, void *userdata, sd_bus_error *error) {
330 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
331 Session *s = userdata;
338 r = sd_bus_message_read(message, "b", &force);
342 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds);
346 r = sd_bus_creds_get_euid(creds, &uid);
350 if (uid != 0 && (force || uid != s->user->uid))
351 return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may take control");
353 r = session_set_controller(s, sd_bus_message_get_sender(message), force, true);
357 return sd_bus_reply_method_return(message, NULL);
360 static int method_release_control(sd_bus_message *message, void *userdata, sd_bus_error *error) {
361 Session *s = userdata;
366 if (!session_is_controller(s, sd_bus_message_get_sender(message)))
367 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
369 session_drop_controller(s);
371 return sd_bus_reply_method_return(message, NULL);
374 static int method_take_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
375 Session *s = userdata;
376 uint32_t major, minor;
384 r = sd_bus_message_read(message, "uu", &major, &minor);
388 if (!session_is_controller(s, sd_bus_message_get_sender(message)))
389 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
391 dev = makedev(major, minor);
392 sd = hashmap_get(s->devices, &dev);
394 /* We don't allow retrieving a device multiple times.
395 * The related ReleaseDevice call is not ref-counted.
396 * The caller should use dup() if it requires more
397 * than one fd (it would be functionally
399 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_IS_TAKEN, "Device already taken");
401 r = session_device_new(s, dev, true, &sd);
405 r = session_device_save(sd);
409 r = sd_bus_reply_method_return(message, "hb", sd->fd, !sd->active);
417 session_device_free(sd);
421 static int method_release_device(sd_bus_message *message, void *userdata, sd_bus_error *error) {
422 Session *s = userdata;
423 uint32_t major, minor;
431 r = sd_bus_message_read(message, "uu", &major, &minor);
435 if (!session_is_controller(s, sd_bus_message_get_sender(message)))
436 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
438 dev = makedev(major, minor);
439 sd = hashmap_get(s->devices, &dev);
441 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
443 session_device_free(sd);
446 return sd_bus_reply_method_return(message, NULL);
449 static int method_pause_device_complete(sd_bus_message *message, void *userdata, sd_bus_error *error) {
450 Session *s = userdata;
451 uint32_t major, minor;
459 r = sd_bus_message_read(message, "uu", &major, &minor);
463 if (!session_is_controller(s, sd_bus_message_get_sender(message)))
464 return sd_bus_error_setf(error, BUS_ERROR_NOT_IN_CONTROL, "You are not in control of this session");
466 dev = makedev(major, minor);
467 sd = hashmap_get(s->devices, &dev);
469 return sd_bus_error_setf(error, BUS_ERROR_DEVICE_NOT_TAKEN, "Device not taken");
471 session_device_complete_pause(sd);
473 return sd_bus_reply_method_return(message, NULL);
476 const sd_bus_vtable session_vtable[] = {
477 SD_BUS_VTABLE_START(0),
479 SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Session, id), SD_BUS_VTABLE_PROPERTY_CONST),
480 SD_BUS_PROPERTY("User", "(uo)", property_get_user, 0, SD_BUS_VTABLE_PROPERTY_CONST),
481 SD_BUS_PROPERTY("Name", "s", property_get_name, 0, SD_BUS_VTABLE_PROPERTY_CONST),
482 BUS_PROPERTY_DUAL_TIMESTAMP("Timestamp", offsetof(Session, timestamp), SD_BUS_VTABLE_PROPERTY_CONST),
483 SD_BUS_PROPERTY("VTNr", "u", NULL, offsetof(Session, vtnr), SD_BUS_VTABLE_PROPERTY_CONST),
484 SD_BUS_PROPERTY("Seat", "(so)", property_get_seat, 0, SD_BUS_VTABLE_PROPERTY_CONST),
485 SD_BUS_PROPERTY("TTY", "s", NULL, offsetof(Session, tty), SD_BUS_VTABLE_PROPERTY_CONST),
486 SD_BUS_PROPERTY("Display", "s", NULL, offsetof(Session, display), SD_BUS_VTABLE_PROPERTY_CONST),
487 SD_BUS_PROPERTY("Remote", "b", bus_property_get_bool, offsetof(Session, remote), SD_BUS_VTABLE_PROPERTY_CONST),
488 SD_BUS_PROPERTY("RemoteHost", "s", NULL, offsetof(Session, remote_host), SD_BUS_VTABLE_PROPERTY_CONST),
489 SD_BUS_PROPERTY("RemoteUser", "s", NULL, offsetof(Session, remote_user), SD_BUS_VTABLE_PROPERTY_CONST),
490 SD_BUS_PROPERTY("Service", "s", NULL, offsetof(Session, service), SD_BUS_VTABLE_PROPERTY_CONST),
491 SD_BUS_PROPERTY("Desktop", "s", NULL, offsetof(Session, desktop), SD_BUS_VTABLE_PROPERTY_CONST),
492 SD_BUS_PROPERTY("Scope", "s", NULL, offsetof(Session, scope), SD_BUS_VTABLE_PROPERTY_CONST),
493 SD_BUS_PROPERTY("Leader", "u", bus_property_get_pid, offsetof(Session, leader), SD_BUS_VTABLE_PROPERTY_CONST),
494 SD_BUS_PROPERTY("Audit", "u", NULL, offsetof(Session, audit_id), SD_BUS_VTABLE_PROPERTY_CONST),
495 SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Session, type), SD_BUS_VTABLE_PROPERTY_CONST),
496 SD_BUS_PROPERTY("Class", "s", property_get_class, offsetof(Session, class), SD_BUS_VTABLE_PROPERTY_CONST),
497 SD_BUS_PROPERTY("Active", "b", property_get_active, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
498 SD_BUS_PROPERTY("State", "s", property_get_state, 0, 0),
499 SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
500 SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
501 SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
502 SD_BUS_PROPERTY("LockedHint", "b", property_get_locked_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
504 SD_BUS_METHOD("Terminate", NULL, NULL, bus_session_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED),
505 SD_BUS_METHOD("Activate", NULL, NULL, bus_session_method_activate, SD_BUS_VTABLE_UNPRIVILEGED),
506 SD_BUS_METHOD("Lock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED),
507 SD_BUS_METHOD("Unlock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED),
508 SD_BUS_METHOD("SetIdleHint", "b", NULL, method_set_idle_hint, SD_BUS_VTABLE_UNPRIVILEGED),
509 SD_BUS_METHOD("SetLockedHint", "b", NULL, method_set_locked_hint, SD_BUS_VTABLE_UNPRIVILEGED),
510 SD_BUS_METHOD("Kill", "si", NULL, bus_session_method_kill, SD_BUS_VTABLE_UNPRIVILEGED),
511 SD_BUS_METHOD("TakeControl", "b", NULL, method_take_control, SD_BUS_VTABLE_UNPRIVILEGED),
512 SD_BUS_METHOD("ReleaseControl", NULL, NULL, method_release_control, SD_BUS_VTABLE_UNPRIVILEGED),
513 SD_BUS_METHOD("TakeDevice", "uu", "hb", method_take_device, SD_BUS_VTABLE_UNPRIVILEGED),
514 SD_BUS_METHOD("ReleaseDevice", "uu", NULL, method_release_device, SD_BUS_VTABLE_UNPRIVILEGED),
515 SD_BUS_METHOD("PauseDeviceComplete", "uu", NULL, method_pause_device_complete, SD_BUS_VTABLE_UNPRIVILEGED),
517 SD_BUS_SIGNAL("PauseDevice", "uus", 0),
518 SD_BUS_SIGNAL("ResumeDevice", "uuh", 0),
519 SD_BUS_SIGNAL("Lock", NULL, 0),
520 SD_BUS_SIGNAL("Unlock", NULL, 0),
525 int session_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
526 Manager *m = userdata;
536 if (streq(path, "/org/freedesktop/login1/session/self")) {
537 sd_bus_message *message;
539 message = sd_bus_get_current_message(bus);
543 r = manager_get_session_from_creds(m, message, NULL, error, &session);
547 _cleanup_free_ char *e = NULL;
550 p = startswith(path, "/org/freedesktop/login1/session/");
554 e = bus_label_unescape(p);
558 session = hashmap_get(m->sessions, e);
567 char *session_bus_path(Session *s) {
568 _cleanup_free_ char *t = NULL;
572 t = bus_label_escape(s->id);
576 return strappend("/org/freedesktop/login1/session/", t);
579 int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
580 _cleanup_strv_free_ char **l = NULL;
581 sd_bus_message *message;
582 Manager *m = userdata;
591 HASHMAP_FOREACH(session, m->sessions, i) {
594 p = session_bus_path(session);
598 r = strv_consume(&l, p);
603 message = sd_bus_get_current_message(bus);
605 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
608 r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds);
610 r = sd_bus_creds_get_session(creds, &name);
612 session = hashmap_get(m->sessions, name);
614 r = strv_extend(&l, "/org/freedesktop/login1/session/self");
622 *nodes = TAKE_PTR(l);
627 int session_send_signal(Session *s, bool new_session) {
628 _cleanup_free_ char *p = NULL;
632 p = session_bus_path(s);
636 return sd_bus_emit_signal(
638 "/org/freedesktop/login1",
639 "org.freedesktop.login1.Manager",
640 new_session ? "SessionNew" : "SessionRemoved",
644 int session_send_changed(Session *s, const char *properties, ...) {
645 _cleanup_free_ char *p = NULL;
653 p = session_bus_path(s);
657 l = strv_from_stdarg_alloca(properties);
659 return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Session", l);
662 int session_send_lock(Session *s, bool lock) {
663 _cleanup_free_ char *p = NULL;
667 p = session_bus_path(s);
671 return sd_bus_emit_signal(
674 "org.freedesktop.login1.Session",
675 lock ? "Lock" : "Unlock",
679 int session_send_lock_all(Manager *m, bool lock) {
686 HASHMAP_FOREACH(session, m->sessions, i) {
689 k = session_send_lock(session, lock);
697 int session_send_create_reply(Session *s, sd_bus_error *error) {
698 _cleanup_(sd_bus_message_unrefp) sd_bus_message *c = NULL;
699 _cleanup_close_ int fifo_fd = -1;
700 _cleanup_free_ char *p = NULL;
704 /* This is called after the session scope and the user service
705 * were successfully created, and finishes where
706 * bus_manager_create_session() left off. */
708 if (!s->create_message)
711 #if 0 /// elogind does not support scope and service jobs
712 if (!sd_bus_error_is_set(error) && (s->scope_job || s->user->service_job))
716 c = s->create_message;
717 s->create_message = NULL;
720 return sd_bus_reply_method_error(c, error);
722 fifo_fd = session_create_fifo(s);
726 /* Update the session state file before we notify the client
727 * about the result. */
730 #if 1 /// Additionally elogind saves the user state file
733 p = session_bus_path(s);
737 log_debug("Sending reply about created session: "
738 "id=%s object_path=%s uid=%u runtime_path=%s "
739 "session_fd=%d seat=%s vtnr=%u",
742 (uint32_t) s->user->uid,
743 s->user->runtime_path,
745 s->seat ? s->seat->id : "",
748 return sd_bus_reply_method_return(
752 s->user->runtime_path,
754 (uint32_t) s->user->uid,
755 s->seat ? s->seat->id : "",