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