| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| |
| #include "alloc-util.h" |
| #include "bus-common-errors.h" |
| #include "bus-get-properties.h" |
| #include "bus-label.h" |
| #include "bus-polkit.h" |
| #include "bus-util.h" |
| #include "logind-dbus.h" |
| #include "logind-polkit.h" |
| #include "logind-seat-dbus.h" |
| #include "logind-seat.h" |
| #include "logind-session-dbus.h" |
| #include "logind.h" |
| #include "missing_capability.h" |
| #include "strv.h" |
| #include "user-util.h" |
| |
| static BUS_DEFINE_PROPERTY_GET_GLOBAL(property_get_const_true, "b", true); |
| static BUS_DEFINE_PROPERTY_GET(property_get_can_tty, "b", Seat, seat_can_tty); |
| static BUS_DEFINE_PROPERTY_GET(property_get_can_graphical, "b", Seat, seat_can_graphical); |
| |
| static int property_get_active_session( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| _cleanup_free_ char *p = NULL; |
| Seat *s = ASSERT_PTR(userdata); |
| |
| assert(bus); |
| assert(reply); |
| |
| p = s->active ? session_bus_path(s->active) : strdup("/"); |
| if (!p) |
| return -ENOMEM; |
| |
| return sd_bus_message_append(reply, "(so)", s->active ? s->active->id : "", p); |
| } |
| |
| static int property_get_sessions( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Seat *s = ASSERT_PTR(userdata); |
| int r; |
| |
| assert(bus); |
| assert(reply); |
| |
| r = sd_bus_message_open_container(reply, 'a', "(so)"); |
| if (r < 0) |
| return r; |
| |
| LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
| _cleanup_free_ char *p = NULL; |
| |
| p = session_bus_path(session); |
| if (!p) |
| return -ENOMEM; |
| |
| r = sd_bus_message_append(reply, "(so)", session->id, p); |
| if (r < 0) |
| return r; |
| |
| } |
| |
| r = sd_bus_message_close_container(reply); |
| if (r < 0) |
| return r; |
| |
| return 1; |
| } |
| |
| static int property_get_idle_hint( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Seat *s = ASSERT_PTR(userdata); |
| |
| assert(bus); |
| assert(reply); |
| |
| return sd_bus_message_append(reply, "b", seat_get_idle_hint(s, NULL) > 0); |
| } |
| |
| static int property_get_idle_since_hint( |
| sd_bus *bus, |
| const char *path, |
| const char *interface, |
| const char *property, |
| sd_bus_message *reply, |
| void *userdata, |
| sd_bus_error *error) { |
| |
| Seat *s = ASSERT_PTR(userdata); |
| dual_timestamp t; |
| uint64_t u; |
| int r; |
| |
| assert(bus); |
| assert(reply); |
| |
| r = seat_get_idle_hint(s, &t); |
| if (r < 0) |
| return r; |
| |
| u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; |
| |
| return sd_bus_message_append(reply, "t", u); |
| } |
| |
| int bus_seat_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Seat *s = ASSERT_PTR(userdata); |
| int r; |
| |
| assert(message); |
| |
| r = bus_verify_polkit_async( |
| message, |
| CAP_KILL, |
| "org.freedesktop.login1.manage", |
| NULL, |
| false, |
| UID_INVALID, |
| &s->manager->polkit_registry, |
| error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = seat_stop_sessions(s, /* force = */ true); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int method_activate_session(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Seat *s = ASSERT_PTR(userdata); |
| const char *name; |
| Session *session; |
| int r; |
| |
| assert(message); |
| |
| r = sd_bus_message_read(message, "s", &name); |
| if (r < 0) |
| return r; |
| |
| session = hashmap_get(s->manager->sessions, name); |
| if (!session) |
| return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SESSION, "No session '%s' known", name); |
| |
| if (session->seat != s) |
| return sd_bus_error_setf(error, BUS_ERROR_SESSION_NOT_ON_SEAT, "Session %s not on seat %s", name, s->id); |
| |
| r = check_polkit_chvt(message, s->manager, error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = session_activate(session); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int method_switch_to(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Seat *s = ASSERT_PTR(userdata); |
| unsigned to; |
| int r; |
| |
| assert(message); |
| |
| r = sd_bus_message_read(message, "u", &to); |
| if (r < 0) |
| return r; |
| |
| if (to <= 0) |
| return sd_bus_error_set(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid virtual terminal"); |
| |
| r = check_polkit_chvt(message, s->manager, error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = seat_switch_to(s, to); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int method_switch_to_next(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Seat *s = ASSERT_PTR(userdata); |
| int r; |
| |
| assert(message); |
| |
| r = check_polkit_chvt(message, s->manager, error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = seat_switch_to_next(s); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int method_switch_to_previous(sd_bus_message *message, void *userdata, sd_bus_error *error) { |
| Seat *s = ASSERT_PTR(userdata); |
| int r; |
| |
| assert(message); |
| |
| r = check_polkit_chvt(message, s->manager, error); |
| if (r < 0) |
| return r; |
| if (r == 0) |
| return 1; /* Will call us back */ |
| |
| r = seat_switch_to_previous(s); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_reply_method_return(message, NULL); |
| } |
| |
| static int seat_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { |
| _cleanup_free_ char *e = NULL; |
| sd_bus_message *message; |
| Manager *m = ASSERT_PTR(userdata); |
| const char *p; |
| Seat *seat; |
| int r; |
| |
| assert(bus); |
| assert(path); |
| assert(interface); |
| assert(found); |
| |
| p = startswith(path, "/org/freedesktop/login1/seat/"); |
| if (!p) |
| return 0; |
| |
| e = bus_label_unescape(p); |
| if (!e) |
| return -ENOMEM; |
| |
| message = sd_bus_get_current_message(bus); |
| |
| r = manager_get_seat_from_creds(m, message, e, error, &seat); |
| if (r == -ENXIO) { |
| sd_bus_error_free(error); |
| return 0; |
| } |
| if (r < 0) |
| return r; |
| |
| *found = seat; |
| return 1; |
| } |
| |
| char *seat_bus_path(Seat *s) { |
| _cleanup_free_ char *t = NULL; |
| |
| assert(s); |
| |
| t = bus_label_escape(s->id); |
| if (!t) |
| return NULL; |
| |
| return strjoin("/org/freedesktop/login1/seat/", t); |
| } |
| |
| static int seat_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { |
| _cleanup_strv_free_ char **l = NULL; |
| sd_bus_message *message; |
| Manager *m = userdata; |
| Seat *seat; |
| int r; |
| |
| assert(bus); |
| assert(path); |
| assert(nodes); |
| |
| HASHMAP_FOREACH(seat, m->seats) { |
| char *p; |
| |
| p = seat_bus_path(seat); |
| if (!p) |
| return -ENOMEM; |
| |
| r = strv_consume(&l, p); |
| if (r < 0) |
| return r; |
| } |
| |
| message = sd_bus_get_current_message(bus); |
| if (message) { |
| _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; |
| |
| r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID|SD_BUS_CREDS_AUGMENT, &creds); |
| if (r >= 0) { |
| bool may_auto = false; |
| const char *name; |
| |
| r = sd_bus_creds_get_session(creds, &name); |
| if (r >= 0) { |
| Session *session; |
| |
| session = hashmap_get(m->sessions, name); |
| if (session && session->seat) { |
| r = strv_extend(&l, "/org/freedesktop/login1/seat/self"); |
| if (r < 0) |
| return r; |
| |
| may_auto = true; |
| } |
| } |
| |
| if (!may_auto) { |
| uid_t uid; |
| |
| r = sd_bus_creds_get_owner_uid(creds, &uid); |
| if (r >= 0) { |
| User *user; |
| |
| user = hashmap_get(m->users, UID_TO_PTR(uid)); |
| may_auto = user && user->display && user->display->seat; |
| } |
| } |
| |
| if (may_auto) { |
| r = strv_extend(&l, "/org/freedesktop/login1/seat/auto"); |
| if (r < 0) |
| return r; |
| } |
| } |
| } |
| |
| *nodes = TAKE_PTR(l); |
| return 1; |
| } |
| |
| int seat_send_signal(Seat *s, bool new_seat) { |
| _cleanup_free_ char *p = NULL; |
| |
| assert(s); |
| |
| p = seat_bus_path(s); |
| if (!p) |
| return -ENOMEM; |
| |
| return sd_bus_emit_signal( |
| s->manager->bus, |
| "/org/freedesktop/login1", |
| "org.freedesktop.login1.Manager", |
| new_seat ? "SeatNew" : "SeatRemoved", |
| "so", s->id, p); |
| } |
| |
| int seat_send_changed(Seat *s, const char *properties, ...) { |
| _cleanup_free_ char *p = NULL; |
| char **l; |
| |
| assert(s); |
| |
| if (!s->started) |
| return 0; |
| |
| p = seat_bus_path(s); |
| if (!p) |
| return -ENOMEM; |
| |
| l = strv_from_stdarg_alloca(properties); |
| |
| return sd_bus_emit_properties_changed_strv(s->manager->bus, p, "org.freedesktop.login1.Seat", l); |
| } |
| |
| static const sd_bus_vtable seat_vtable[] = { |
| SD_BUS_VTABLE_START(0), |
| |
| SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Seat, id), SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("ActiveSession", "(so)", property_get_active_session, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| SD_BUS_PROPERTY("CanMultiSession", "b", property_get_const_true, 0, SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_HIDDEN), |
| SD_BUS_PROPERTY("CanTTY", "b", property_get_can_tty, 0, SD_BUS_VTABLE_PROPERTY_CONST), |
| SD_BUS_PROPERTY("CanGraphical", "b", property_get_can_graphical, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| SD_BUS_PROPERTY("Sessions", "a(so)", property_get_sessions, 0, 0), |
| SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), |
| |
| SD_BUS_METHOD("Terminate", NULL, NULL, bus_seat_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), |
| |
| SD_BUS_METHOD_WITH_ARGS("ActivateSession", |
| SD_BUS_ARGS("s", session_id), |
| SD_BUS_NO_RESULT, |
| method_activate_session, |
| SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD_WITH_ARGS("SwitchTo", |
| SD_BUS_ARGS("u", vtnr), |
| SD_BUS_NO_RESULT, |
| method_switch_to, |
| SD_BUS_VTABLE_UNPRIVILEGED), |
| |
| SD_BUS_METHOD("SwitchToNext", NULL, NULL, method_switch_to_next, SD_BUS_VTABLE_UNPRIVILEGED), |
| SD_BUS_METHOD("SwitchToPrevious", NULL, NULL, method_switch_to_previous, SD_BUS_VTABLE_UNPRIVILEGED), |
| |
| SD_BUS_VTABLE_END |
| }; |
| |
| const BusObjectImplementation seat_object = { |
| "/org/freedesktop/login1/seat", |
| "org.freedesktop.login1.Seat", |
| .fallback_vtables = BUS_FALLBACK_VTABLES({seat_vtable, seat_object_find}), |
| .node_enumerator = seat_node_enumerator, |
| }; |
