/* -*- mode: C; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
/* vim:set et sts=4: */
/* bus - The Input Bus
* Copyright (C) 2008-2010 Peng Huang <shawn.p.huang@gmail.com>
* Copyright (C) 2011-2019 Takao Fujiwara <takao.fujiwara1@gmail.com>
* Copyright (C) 2008-2019 Red Hat, Inc.
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*/
#include "server.h"
#include <gio/gio.h>
#include <stdlib.h>
#include <string.h>
#include "dbusimpl.h"
#include "ibusimpl.h"
#include "global.h"
static GDBusServer *server = NULL;
static GMainLoop *mainloop = NULL;
static BusDBusImpl *dbus = NULL;
static BusIBusImpl *ibus = NULL;
static gchar *address = NULL;
static gboolean _restart = FALSE;
static void
_restart_server (void)
{
gchar *exe;
gint fd;
exe = g_strdup_printf ("/proc/%d/exe", getpid ());
exe = g_file_read_link (exe, NULL);
if (exe == NULL)
exe = BINDIR "/ibus-daemon";
/* close all fds except stdin, stdout, stderr */
for (fd = 3; fd <= sysconf (_SC_OPEN_MAX); fd ++) {
close (fd);
}
_restart = FALSE;
execv (exe, g_argv);
/* If the server binary is replaced while the server is running,
* "readlink /proc/[pid]/exe" might return a path with " (deleted)"
* suffix. */
const gchar suffix[] = " (deleted)";
if (g_str_has_suffix (exe, suffix)) {
exe [strlen (exe) - sizeof (suffix) + 1] = '\0';
execv (exe, g_argv);
}
g_warning ("execv %s failed!", g_argv[0]);
exit (-1);
}
/**
* bus_allow_mechanism_cb:
* @observer: A #GDBusAuthObserver.
* @mechanism: The name of the mechanism.
* @user_data: always %NULL.
*
* Check if @mechanism can be used to authenticate the other peer.
* Returns: %TRUE if the peer's mechanism is allowed.
*/
static gboolean
bus_allow_mechanism_cb (GDBusAuthObserver *observer,
const gchar *mechanism,
G_GNUC_UNUSED gpointer user_data)
{
if (g_strcmp0 (mechanism, "EXTERNAL") == 0)
return TRUE;
return FALSE;
}
/**
* bus_authorize_authenticated_peer_cb:
* @observer: A #GDBusAuthObserver.
* @stream: A #GIOStream.
* @credentials: A #GCredentials.
* @user_data: always %NULL.
*
* Check if a peer who has already authenticated should be authorized.
* Returns: %TRUE if the peer's credential is authorized.
*/
static gboolean
bus_authorize_authenticated_peer_cb (GDBusAuthObserver *observer,
GIOStream *stream,
GCredentials *credentials,
G_GNUC_UNUSED gpointer user_data)
{
gboolean authorized = FALSE;
if (credentials) {
GCredentials *own_credentials = g_credentials_new ();
if (g_credentials_is_same_user (credentials, own_credentials, NULL))
authorized = TRUE;
g_object_unref (own_credentials);
}
return authorized;
}
/**
* bus_new_connection_cb:
* @observer: A #GDBusAuthObserver.
* @dbus_connection: A #GDBusconnection.
* @user_data: always %NULL.
*
* Handle incoming connections.
* Returns: %TRUE when the function can handle the connection.
*/
static gboolean
bus_new_connection_cb (GDBusServer *server,
GDBusConnection *dbus_connection,
G_GNUC_UNUSED gpointer user_data)
{
BusConnection *connection = bus_connection_new (dbus_connection);
bus_dbus_impl_new_connection (dbus, connection);
if (g_object_is_floating (connection)) {
/* bus_dbus_impl_new_connection couldn't handle the connection. just delete the connection and return TRUE
* (so that other connection handler will not handle the deleted connection.) */
ibus_object_destroy ((IBusObject *)connection);
g_object_unref (connection);
}
return TRUE;
}
static void
_server_connect_start_portal_cb (GObject *source_object,
GAsyncResult *res,
G_GNUC_UNUSED gpointer user_data)
{
GVariant *result;
GError *error = NULL;
result = g_dbus_connection_call_finish (G_DBUS_CONNECTION (source_object),
res,
&error);
if (result != NULL) {
g_variant_unref (result);
} else {
g_print ("portal is not running: %s\n", error->message);
g_error_free (error);
}
}
static void
bus_acquired_handler (GDBusConnection *connection,
const gchar *name,
G_GNUC_UNUSED gpointer user_data)
{
g_dbus_connection_call (connection,
IBUS_SERVICE_PORTAL,
IBUS_PATH_IBUS,
"org.freedesktop.DBus.Peer",
"Ping",
g_variant_new ("()"),
G_VARIANT_TYPE ("()"),
G_DBUS_CALL_FLAGS_NONE,
-1,
NULL /* cancellable */,
(GAsyncReadyCallback)
_server_connect_start_portal_cb,
NULL);
}
void
bus_server_init (void)
{
GError *error = NULL;
GDBusServerFlags flags = G_DBUS_SERVER_FLAGS_NONE;
gchar *guid;
GDBusAuthObserver *observer;
dbus = bus_dbus_impl_get_default ();
ibus = bus_ibus_impl_get_default ();
bus_dbus_impl_register_object (dbus, (IBusService *)ibus);
/* init server */
guid = g_dbus_generate_guid ();
observer = g_dbus_auth_observer_new ();
if (!g_str_has_prefix (g_address, "unix:tmpdir=") &&
!g_str_has_prefix (g_address, "unix:path=")) {
g_error ("Your socket address does not have the format unix:tmpdir=$DIR "
"or unix:path=$FILE; %s", g_address);
}
server = g_dbus_server_new_sync (
g_address, /* the place where the socket file lives, e.g. /tmp, abstract namespace, etc. */
flags, guid,
observer,
NULL /* cancellable */,
&error);
if (server == NULL) {
g_error ("g_dbus_server_new_sync() is failed with address %s "
"and guid %s: %s",
g_address, guid, error->message);
}
g_free (guid);
g_signal_connect (observer, "allow-mechanism",
G_CALLBACK (bus_allow_mechanism_cb), NULL);
g_signal_connect (observer, "authorize-authenticated-peer",
G_CALLBACK (bus_authorize_authenticated_peer_cb), NULL);
g_object_unref (observer);
g_signal_connect (server, "new-connection",
G_CALLBACK (bus_new_connection_cb), NULL);
g_dbus_server_start (server);
address = g_strdup_printf ("%s,guid=%s",
g_dbus_server_get_client_address (server),
g_dbus_server_get_guid (server));
/* write address to file */
ibus_write_address (address);
/* own a session bus name so that third parties can easily track our life-cycle */
g_bus_own_name (G_BUS_TYPE_SESSION, IBUS_SERVICE_IBUS,
G_BUS_NAME_OWNER_FLAGS_NONE,
bus_acquired_handler,
NULL, NULL, NULL, NULL);
}
const gchar *
bus_server_get_address (void)
{
return address;
}
void
bus_server_run (void)
{
g_return_if_fail (server);
/* create and run main loop */
mainloop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (mainloop);
/* bus_server_quit is called. stop server */
g_dbus_server_stop (server);
ibus_object_destroy ((IBusObject *)dbus);
ibus_object_destroy ((IBusObject *)ibus);
/* release resources */
g_object_unref (server);
g_main_loop_unref (mainloop);
mainloop = NULL;
g_free (address);
address = NULL;
/* When _ibus_exit() is called, bus_ibus_impl_destroy() needs
* to be called so that waitpid() prevents the processes from
* becoming the daemons. So we run execv() after
* ibus_object_destroy(ibus) is called here. */
if (_restart) {
_restart_server ();
/* should not reach here */
g_assert_not_reached ();
}
}
void
bus_server_quit (gboolean restart)
{
_restart = restart;
if (mainloop)
g_main_loop_quit (mainloop);
}