| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2011 Lennart Poettering |
| |
| systemd is free software; you can redistribute it and/or modify it |
| under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2.1 of the License, or |
| (at your option) any later version. |
| |
| systemd is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with systemd; If not, see <http://www.gnu.org/licenses/>. |
| ***/ |
| |
| #include <errno.h> |
| #include <string.h> |
| |
| #include "logind.h" |
| #include "logind-seat.h" |
| #include "dbus-common.h" |
| #include "util.h" |
| |
| #define BUS_SEAT_INTERFACE \ |
| " <interface name=\"org.freedesktop.login1.Seat\">\n" \ |
| " <method name=\"Terminate\"/>\n" \ |
| " <method name=\"ActivateSession\">\n" \ |
| " <arg name=\"id\" type=\"s\"/>\n" \ |
| " </method>\n" \ |
| " <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \ |
| " <property name=\"ActiveSession\" type=\"so\" access=\"read\"/>\n" \ |
| " <property name=\"CanMultiSession\" type=\"b\" access=\"read\"/>\n" \ |
| " <property name=\"Sessions\" type=\"a(so)\" access=\"read\"/>\n" \ |
| " <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n" \ |
| " <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \ |
| " <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \ |
| " </interface>\n" \ |
| |
| #define INTROSPECTION \ |
| DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \ |
| "<node>\n" \ |
| BUS_SEAT_INTERFACE \ |
| BUS_PROPERTIES_INTERFACE \ |
| BUS_PEER_INTERFACE \ |
| BUS_INTROSPECTABLE_INTERFACE \ |
| "</node>\n" |
| |
| #define INTERFACES_LIST \ |
| BUS_GENERIC_INTERFACES_LIST \ |
| "org.freedesktop.login1.Seat\0" |
| |
| static int bus_seat_append_active(DBusMessageIter *i, const char *property, void *data) { |
| DBusMessageIter sub; |
| Seat *s = data; |
| const char *id, *path; |
| char *p = NULL; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub)) |
| return -ENOMEM; |
| |
| if (s->active) { |
| id = s->active->id; |
| path = p = session_bus_path(s->active); |
| |
| if (!p) |
| return -ENOMEM; |
| } else { |
| id = ""; |
| path = "/"; |
| } |
| |
| if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) || |
| !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &path)) { |
| free(p); |
| return -ENOMEM; |
| } |
| |
| free(p); |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_seat_append_sessions(DBusMessageIter *i, const char *property, void *data) { |
| DBusMessageIter sub, sub2; |
| Seat *s = data; |
| Session *session; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "(so)", &sub)) |
| return -ENOMEM; |
| |
| LIST_FOREACH(sessions_by_seat, session, s->sessions) { |
| char *p; |
| |
| if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2)) |
| return -ENOMEM; |
| |
| p = session_bus_path(session); |
| if (!p) |
| return -ENOMEM; |
| |
| if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) || |
| !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) { |
| free(p); |
| return -ENOMEM; |
| } |
| |
| free(p); |
| |
| if (!dbus_message_iter_close_container(&sub, &sub2)) |
| return -ENOMEM; |
| } |
| |
| if (!dbus_message_iter_close_container(i, &sub)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_seat_append_multi_session(DBusMessageIter *i, const char *property, void *data) { |
| Seat *s = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| b = seat_can_multi_session(s); |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_seat_append_idle_hint(DBusMessageIter *i, const char *property, void *data) { |
| Seat *s = data; |
| dbus_bool_t b; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| b = seat_get_idle_hint(s, NULL) > 0; |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int bus_seat_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) { |
| Seat *s = data; |
| dual_timestamp t; |
| uint64_t k; |
| |
| assert(i); |
| assert(property); |
| assert(s); |
| |
| seat_get_idle_hint(s, &t); |
| k = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic; |
| |
| if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &k)) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| static int get_seat_for_path(Manager *m, const char *path, Seat **_s) { |
| Seat *s; |
| char *id; |
| |
| assert(m); |
| assert(path); |
| assert(_s); |
| |
| if (!startswith(path, "/org/freedesktop/login1/seat/")) |
| return -EINVAL; |
| |
| id = bus_path_unescape(path + 29); |
| if (!id) |
| return -ENOMEM; |
| |
| s = hashmap_get(m->seats, id); |
| free(id); |
| |
| if (!s) |
| return -ENOENT; |
| |
| *_s = s; |
| return 0; |
| } |
| |
| static const BusProperty bus_login_seat_properties[] = { |
| { "Id", bus_property_append_string, "s", offsetof(Seat, id), true }, |
| { "ActiveSession", bus_seat_append_active, "(so)", 0 }, |
| { "CanMultiSession", bus_seat_append_multi_session, "b", 0 }, |
| { "Sessions", bus_seat_append_sessions, "a(so)", 0 }, |
| { "IdleHint", bus_seat_append_idle_hint, "b", 0 }, |
| { "IdleSinceHint", bus_seat_append_idle_hint_since, "t", 0 }, |
| { "IdleSinceHintMonotonic", bus_seat_append_idle_hint_since, "t", 0 }, |
| { NULL, } |
| }; |
| |
| static DBusHandlerResult seat_message_dispatch( |
| Seat *s, |
| DBusConnection *connection, |
| DBusMessage *message) { |
| |
| DBusError error; |
| DBusMessage *reply = NULL; |
| int r; |
| |
| assert(s); |
| assert(connection); |
| assert(message); |
| |
| dbus_error_init(&error); |
| |
| if (dbus_message_is_method_call(message, "org.freedesktop.login1.Seat", "Terminate")) { |
| |
| r = seat_stop_sessions(s); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, NULL, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| |
| } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Seat", "ActivateSession")) { |
| const char *name; |
| Session *session; |
| |
| if (!dbus_message_get_args( |
| message, |
| &error, |
| DBUS_TYPE_STRING, &name, |
| DBUS_TYPE_INVALID)) |
| return bus_send_error_reply(connection, message, &error, -EINVAL); |
| |
| session = hashmap_get(s->manager->sessions, name); |
| if (!session || session->seat != s) |
| return bus_send_error_reply(connection, message, &error, -ENOENT); |
| |
| r = session_activate(session); |
| if (r < 0) |
| return bus_send_error_reply(connection, message, NULL, r); |
| |
| reply = dbus_message_new_method_return(message); |
| if (!reply) |
| goto oom; |
| } else { |
| const BusBoundProperties bps[] = { |
| { "org.freedesktop.login1.Seat", bus_login_seat_properties, s }, |
| { NULL, } |
| }; |
| return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, bps); |
| } |
| |
| if (reply) { |
| if (!dbus_connection_send(connection, reply, NULL)) |
| goto oom; |
| |
| dbus_message_unref(reply); |
| } |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| |
| oom: |
| if (reply) |
| dbus_message_unref(reply); |
| |
| dbus_error_free(&error); |
| |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| } |
| |
| static DBusHandlerResult seat_message_handler( |
| DBusConnection *connection, |
| DBusMessage *message, |
| void *userdata) { |
| |
| Manager *m = userdata; |
| Seat *s; |
| int r; |
| |
| r = get_seat_for_path(m, dbus_message_get_path(message), &s); |
| if (r < 0) { |
| |
| if (r == -ENOMEM) |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| |
| if (r == -ENOENT) { |
| DBusError e; |
| |
| dbus_error_init(&e); |
| dbus_set_error_const(&e, DBUS_ERROR_UNKNOWN_OBJECT, "Unknown seat"); |
| return bus_send_error_reply(connection, message, &e, r); |
| } |
| |
| return bus_send_error_reply(connection, message, NULL, r); |
| } |
| |
| return seat_message_dispatch(s, connection, message); |
| } |
| |
| const DBusObjectPathVTable bus_seat_vtable = { |
| .message_function = seat_message_handler |
| }; |
| |
| char *seat_bus_path(Seat *s) { |
| char *t, *r; |
| |
| assert(s); |
| |
| t = bus_path_escape(s->id); |
| if (!t) |
| return NULL; |
| |
| r = strappend("/org/freedesktop/login1/seat/", t); |
| free(t); |
| |
| return r; |
| } |
| |
| int seat_send_signal(Seat *s, bool new_seat) { |
| DBusMessage *m; |
| int r = -ENOMEM; |
| char *p = NULL; |
| |
| assert(s); |
| |
| m = dbus_message_new_signal("/org/freedesktop/login1", |
| "org.freedesktop.login1.Manager", |
| new_seat ? "SeatNew" : "SeatRemoved"); |
| |
| if (!m) |
| return -ENOMEM; |
| |
| p = seat_bus_path(s); |
| if (!p) |
| goto finish; |
| |
| if (!dbus_message_append_args( |
| m, |
| DBUS_TYPE_STRING, &s->id, |
| DBUS_TYPE_OBJECT_PATH, &p, |
| DBUS_TYPE_INVALID)) |
| goto finish; |
| |
| if (!dbus_connection_send(s->manager->bus, m, NULL)) |
| goto finish; |
| |
| r = 0; |
| |
| finish: |
| dbus_message_unref(m); |
| free(p); |
| |
| return r; |
| } |
| |
| int seat_send_changed(Seat *s, const char *properties) { |
| DBusMessage *m; |
| int r = -ENOMEM; |
| char *p = NULL; |
| |
| assert(s); |
| |
| if (!s->started) |
| return 0; |
| |
| p = seat_bus_path(s); |
| if (!p) |
| return -ENOMEM; |
| |
| m = bus_properties_changed_new(p, "org.freedesktop.login1.Seat", properties); |
| if (!m) |
| goto finish; |
| |
| if (!dbus_connection_send(s->manager->bus, m, NULL)) |
| goto finish; |
| |
| r = 0; |
| |
| finish: |
| if (m) |
| dbus_message_unref(m); |
| free(p); |
| |
| return r; |
| } |