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/*-*- 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 "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" \
" <property name=\"Id\" type=\"s\" access=\"read\"/>\n" \
" <property name=\"Active\" type=\"so\" access=\"read\"/>\n" \
" <property name=\"Sessions\" type=\"a(so)\" 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 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", "Active", bus_seat_append_active, "(so)", s },
{ "org.freedesktop.login1.Seat", "Sessions", bus_seat_append_sessions, "a(so)", s },
{ NULL, NULL, NULL, NULL, NULL }
};
assert(s);
assert(connection);
assert(message);
return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties);
}
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;
}
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