/*-*- 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 General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU 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_is_vtconsole(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 DBusHandlerResult seat_message_dispatch( Seat *s, DBusConnection *connection, DBusMessage *message) { const BusProperty properties[] = { { "org.freedesktop.login1.Seat", "Id", bus_property_append_string, "s", s->id }, { "org.freedesktop.login1.Seat", "ActiveSession", bus_seat_append_active, "(so)", s }, { "org.freedesktop.login1.Seat", "CanMultiSession", bus_seat_append_multi_session, "b", s }, { "org.freedesktop.login1.Seat", "Sessions", bus_seat_append_sessions, "a(so)", s }, { "org.freedesktop.login1.Seat", "IdleHint", bus_seat_append_idle_hint, "b", s }, { "org.freedesktop.login1.Seat", "IdleSinceHint", bus_seat_append_idle_hint_since, "t", s }, { "org.freedesktop.login1.Seat", "IdleSinceHintMonotonic", bus_seat_append_idle_hint_since, "t", s }, { NULL, NULL, NULL, NULL, NULL } }; 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 return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties); 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; }