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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
commitb750101eb236130cf056c675997decbac904cc49 (patch)
treea5df1a06754bdd014cb975c051c83b01c9a97532 /src/login/logind-seat-dbus.c
parentInitial commit. (diff)
downloadsystemd-b750101eb236130cf056c675997decbac904cc49.tar.xz
systemd-b750101eb236130cf056c675997decbac904cc49.zip
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/login/logind-seat-dbus.c')
-rw-r--r--src/login/logind-seat-dbus.c443
1 files changed, 443 insertions, 0 deletions
diff --git a/src/login/logind-seat-dbus.c b/src/login/logind-seat-dbus.c
new file mode 100644
index 0000000..03a4192
--- /dev/null
+++ b/src/login/logind-seat-dbus.c
@@ -0,0 +1,443 @@
+/* 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"
+#include "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,
+};