dbus-bus.c
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* dbus-bus.c Convenience functions for communicating with the bus.
*
* Copyright (C) 2003 CodeFactory AB
* Copyright (C) 2003 Red Hat, Inc.
*
* Licensed under the Academic Free License version 2.1
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <config.h>
#include "dbus-bus.h"
#include "dbus-protocol.h"
#include "dbus-internals.h"
#include "dbus-message.h"
#include "dbus-marshal-validate.h"
#include "dbus-threads-internal.h"
#include "dbus-connection-internal.h"
#include "dbus-string.h"
typedef struct
{
DBusConnection *connection;
char *unique_name;
unsigned int is_well_known : 1;
} BusData;
static dbus_int32_t bus_data_slot = -1;
#define N_BUS_TYPES 3
static DBusConnection *bus_connections[N_BUS_TYPES];
static char *bus_connection_addresses[N_BUS_TYPES] = { NULL, NULL, NULL };
static DBusBusType activation_bus_type = DBUS_BUS_STARTER;
static dbus_bool_t initialized = FALSE;
_DBUS_DEFINE_GLOBAL_LOCK (bus);
_DBUS_DEFINE_GLOBAL_LOCK (bus_datas);
static void
addresses_shutdown_func (void *data)
{
int i;
i = 0;
while (i < N_BUS_TYPES)
{
if (bus_connections[i] != NULL)
_dbus_warn_check_failed ("dbus_shutdown() called but connections were still live. This probably means the application did not drop all its references to bus connections.\n");
dbus_free (bus_connection_addresses[i]);
bus_connection_addresses[i] = NULL;
++i;
}
activation_bus_type = DBUS_BUS_STARTER;
initialized = FALSE;
}
static dbus_bool_t
get_from_env (char **connection_p,
const char *env_var)
{
const char *s;
_dbus_assert (*connection_p == NULL);
s = _dbus_getenv (env_var);
if (s == NULL || *s == '\0')
return TRUE; /* successfully didn't use the env var */
else
{
*connection_p = _dbus_strdup (s);
return *connection_p != NULL;
}
}
static dbus_bool_t
init_session_address (void)
{
dbus_bool_t retval;
retval = FALSE;
/* First, look in the environment. This is the normal case on
* freedesktop.org/Unix systems. */
get_from_env (&bus_connection_addresses[DBUS_BUS_SESSION],
"DBUS_SESSION_BUS_ADDRESS");
if (bus_connection_addresses[DBUS_BUS_SESSION] == NULL)
{
dbus_bool_t supported;
DBusString addr;
DBusError error = DBUS_ERROR_INIT;
if (!_dbus_string_init (&addr))
return FALSE;
supported = FALSE;
/* So it's not in the environment - let's try a platform-specific method.
* On MacOS, this involves asking launchd. On Windows (not specified yet)
* we might do a COM lookup.
* Ignore errors - if we failed, fall back to autolaunch. */
retval = _dbus_lookup_session_address (&supported, &addr, &error);
if (supported && retval)
{
retval =_dbus_string_steal_data (&addr, &bus_connection_addresses[DBUS_BUS_SESSION]);
}
else if (supported && !retval)
{
if (dbus_error_is_set(&error))
_dbus_warn ("Dynamic session lookup supported but failed: %s\n", error.message);
else
_dbus_warn ("Dynamic session lookup supported but failed silently\n");
}
_dbus_string_free (&addr);
}
else
retval = TRUE;
if (!retval)
return FALSE;
/* The DBUS_SESSION_BUS_DEFAULT_ADDRESS should have really been named
* DBUS_SESSION_BUS_FALLBACK_ADDRESS.
*/
if (bus_connection_addresses[DBUS_BUS_SESSION] == NULL)
bus_connection_addresses[DBUS_BUS_SESSION] =
_dbus_strdup (DBUS_SESSION_BUS_DEFAULT_ADDRESS);
if (bus_connection_addresses[DBUS_BUS_SESSION] == NULL)
return FALSE;
return TRUE;
}
static dbus_bool_t
init_connections_unlocked (void)
{
if (!initialized)
{
const char *s;
int i;
i = 0;
while (i < N_BUS_TYPES)
{
bus_connections[i] = NULL;
++i;
}
/* Don't init these twice, we may run this code twice if
* init_connections_unlocked() fails midway through.
* In practice, each block below should contain only one
* "return FALSE" or running through twice may not
* work right.
*/
if (bus_connection_addresses[DBUS_BUS_SYSTEM] == NULL)
{
_dbus_verbose ("Filling in system bus address...\n");
if (!get_from_env (&bus_connection_addresses[DBUS_BUS_SYSTEM],
"DBUS_SYSTEM_BUS_ADDRESS"))
return FALSE;
}
if (bus_connection_addresses[DBUS_BUS_SYSTEM] == NULL)
{
/* Use default system bus address if none set in environment */
bus_connection_addresses[DBUS_BUS_SYSTEM] =
_dbus_strdup (DBUS_SYSTEM_BUS_DEFAULT_ADDRESS);
if (bus_connection_addresses[DBUS_BUS_SYSTEM] == NULL)
return FALSE;
_dbus_verbose (" used default system bus \"%s\"\n",
bus_connection_addresses[DBUS_BUS_SYSTEM]);
}
else
_dbus_verbose (" used env var system bus \"%s\"\n",
bus_connection_addresses[DBUS_BUS_SYSTEM]);
if (bus_connection_addresses[DBUS_BUS_SESSION] == NULL)
{
_dbus_verbose ("Filling in session bus address...\n");
if (!init_session_address ())
return FALSE;
_dbus_verbose (" \"%s\"\n", bus_connection_addresses[DBUS_BUS_SESSION] ?
bus_connection_addresses[DBUS_BUS_SESSION] : "none set");
}
if (bus_connection_addresses[DBUS_BUS_STARTER] == NULL)
{
_dbus_verbose ("Filling in activation bus address...\n");
if (!get_from_env (&bus_connection_addresses[DBUS_BUS_STARTER],
"DBUS_STARTER_ADDRESS"))
return FALSE;
_dbus_verbose (" \"%s\"\n", bus_connection_addresses[DBUS_BUS_STARTER] ?
bus_connection_addresses[DBUS_BUS_STARTER] : "none set");
}
if (bus_connection_addresses[DBUS_BUS_STARTER] != NULL)
{
s = _dbus_getenv ("DBUS_STARTER_BUS_TYPE");
if (s != NULL)
{
_dbus_verbose ("Bus activation type was set to \"%s\"\n", s);
if (strcmp (s, "system") == 0)
activation_bus_type = DBUS_BUS_SYSTEM;
else if (strcmp (s, "session") == 0)
activation_bus_type = DBUS_BUS_SESSION;
}
}
else
{
/* Default to the session bus instead if available */
if (bus_connection_addresses[DBUS_BUS_SESSION] != NULL)
{
bus_connection_addresses[DBUS_BUS_STARTER] =
_dbus_strdup (bus_connection_addresses[DBUS_BUS_SESSION]);
if (bus_connection_addresses[DBUS_BUS_STARTER] == NULL)
return FALSE;
}
}
/* If we return FALSE we have to be sure that restarting
* the above code will work right
*/
if (!_dbus_setenv ("DBUS_ACTIVATION_ADDRESS", NULL))
return FALSE;
if (!_dbus_setenv ("DBUS_ACTIVATION_BUS_TYPE", NULL))
return FALSE;
if (!_dbus_register_shutdown_func (addresses_shutdown_func,
NULL))
return FALSE;
initialized = TRUE;
}
return initialized;
}
static void
bus_data_free (void *data)
{
BusData *bd = data;
if (bd->is_well_known)
{
int i;
_DBUS_LOCK (bus);
/* We may be stored in more than one slot */
/* This should now be impossible - these slots are supposed to
* be cleared on disconnect, so should not need to be cleared on
* finalize
*/
i = 0;
while (i < N_BUS_TYPES)
{
if (bus_connections[i] == bd->connection)
bus_connections[i] = NULL;
++i;
}
_DBUS_UNLOCK (bus);
}
dbus_free (bd->unique_name);
dbus_free (bd);
dbus_connection_free_data_slot (&bus_data_slot);
}
static BusData*
ensure_bus_data (DBusConnection *connection)
{
BusData *bd;
if (!dbus_connection_allocate_data_slot (&bus_data_slot))
return NULL;
bd = dbus_connection_get_data (connection, bus_data_slot);
if (bd == NULL)
{
bd = dbus_new0 (BusData, 1);
if (bd == NULL)
{
dbus_connection_free_data_slot (&bus_data_slot);
return NULL;
}
bd->connection = connection;
if (!dbus_connection_set_data (connection, bus_data_slot, bd,
bus_data_free))
{
dbus_free (bd);
dbus_connection_free_data_slot (&bus_data_slot);
return NULL;
}
/* Data slot refcount now held by the BusData */
}
else
{
dbus_connection_free_data_slot (&bus_data_slot);
}
return bd;
}
void
_dbus_bus_notify_shared_connection_disconnected_unlocked (DBusConnection *connection)
{
int i;
_DBUS_LOCK (bus);
/* We are expecting to have the connection saved in only one of these
* slots, but someone could in a pathological case set system and session
* bus to the same bus or something. Or set one of them to the starter
* bus without setting the starter bus type in the env variable.
* So we don't break the loop as soon as we find a match.
*/
for (i = 0; i < N_BUS_TYPES; ++i)
{
if (bus_connections[i] == connection)
{
bus_connections[i] = NULL;
}
}
_DBUS_UNLOCK (bus);
}
static DBusConnection *
internal_bus_get (DBusBusType type,
dbus_bool_t private,
DBusError *error)
{
const char *address;
DBusConnection *connection;
BusData *bd;
DBusBusType address_type;
_dbus_return_val_if_fail (type >= 0 && type < N_BUS_TYPES, NULL);
_dbus_return_val_if_error_is_set (error, NULL);
connection = NULL;
_DBUS_LOCK (bus);
if (!init_connections_unlocked ())
{
_DBUS_SET_OOM (error);
goto out;
}
/* We want to use the activation address even if the
* activating bus is the session or system bus,
* per the spec.
*/
address_type = type;
/* Use the real type of the activation bus for getting its
* connection, but only if the real type's address is available. (If
* the activating bus isn't a well-known bus then
* activation_bus_type == DBUS_BUS_STARTER)
*/
if (type == DBUS_BUS_STARTER &&
bus_connection_addresses[activation_bus_type] != NULL)
type = activation_bus_type;
if (!private && bus_connections[type] != NULL)
{
connection = bus_connections[type];
dbus_connection_ref (connection);
goto out;
}
address = bus_connection_addresses[address_type];
if (address == NULL)
{
dbus_set_error (error, DBUS_ERROR_FAILED,
"Unable to determine the address of the message bus (try 'man dbus-launch' and 'man dbus-daemon' for help)");
goto out;
}
if (private)
connection = dbus_connection_open_private (address, error);
else
connection = dbus_connection_open (address, error);
if (!connection)
{
goto out;
}
if (!dbus_bus_register (connection, error))
{
_dbus_connection_close_possibly_shared (connection);
dbus_connection_unref (connection);
connection = NULL;
goto out;
}
if (!private)
{
/* store a weak ref to the connection (dbus-connection.c is
* supposed to have a strong ref that it drops on disconnect,
* since this is a shared connection)
*/
bus_connections[type] = connection;
}
/* By default we're bound to the lifecycle of
* the message bus.
*/
dbus_connection_set_exit_on_disconnect (connection,
TRUE);
_DBUS_LOCK (bus_datas);
bd = ensure_bus_data (connection);
_dbus_assert (bd != NULL); /* it should have been created on
register, so OOM not possible */
bd->is_well_known = TRUE;
_DBUS_UNLOCK (bus_datas);
out:
/* Return a reference to the caller, or NULL with error set. */
if (connection == NULL)
_DBUS_ASSERT_ERROR_IS_SET (error);
_DBUS_UNLOCK (bus);
return connection;
}
/* end of implementation details docs */
DBusConnection *
dbus_bus_get (DBusBusType type,
DBusError *error)
{
return internal_bus_get (type, FALSE, error);
}
DBusConnection *
dbus_bus_get_private (DBusBusType type,
DBusError *error)
{
return internal_bus_get (type, TRUE, error);
}
dbus_bool_t
dbus_bus_register (DBusConnection *connection,
DBusError *error)
{
DBusMessage *message, *reply;
char *name;
BusData *bd;
dbus_bool_t retval;
_dbus_return_val_if_fail (connection != NULL, FALSE);
_dbus_return_val_if_error_is_set (error, FALSE);
retval = FALSE;
message = NULL;
reply = NULL;
_DBUS_LOCK (bus_datas);
bd = ensure_bus_data (connection);
if (bd == NULL)
{
_DBUS_SET_OOM (error);
goto out;
}
if (bd->unique_name != NULL)
{
_dbus_verbose ("Ignoring attempt to register the same DBusConnection %s with the message bus a second time.\n",
bd->unique_name);
/* Success! */
retval = TRUE;
goto out;
}
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"Hello");
if (!message)
{
_DBUS_SET_OOM (error);
goto out;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1, error);
if (reply == NULL)
goto out;
else if (dbus_set_error_from_message (error, reply))
goto out;
else if (!dbus_message_get_args (reply, error,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
goto out;
bd->unique_name = _dbus_strdup (name);
if (bd->unique_name == NULL)
{
_DBUS_SET_OOM (error);
goto out;
}
retval = TRUE;
out:
_DBUS_UNLOCK (bus_datas);
if (message)
dbus_message_unref (message);
if (reply)
dbus_message_unref (reply);
if (!retval)
_DBUS_ASSERT_ERROR_IS_SET (error);
return retval;
}
dbus_bool_t
dbus_bus_set_unique_name (DBusConnection *connection,
const char *unique_name)
{
BusData *bd;
dbus_bool_t success = FALSE;
_dbus_return_val_if_fail (connection != NULL, FALSE);
_dbus_return_val_if_fail (unique_name != NULL, FALSE);
_DBUS_LOCK (bus_datas);
bd = ensure_bus_data (connection);
if (bd == NULL)
goto out;
_dbus_assert (bd->unique_name == NULL);
bd->unique_name = _dbus_strdup (unique_name);
success = bd->unique_name != NULL;
out:
_DBUS_UNLOCK (bus_datas);
return success;
}
const char*
dbus_bus_get_unique_name (DBusConnection *connection)
{
BusData *bd;
const char *unique_name = NULL;
_dbus_return_val_if_fail (connection != NULL, NULL);
_DBUS_LOCK (bus_datas);
bd = ensure_bus_data (connection);
if (bd == NULL)
goto out;
unique_name = bd->unique_name;
out:
_DBUS_UNLOCK (bus_datas);
return unique_name;
}
unsigned long
dbus_bus_get_unix_user (DBusConnection *connection,
const char *name,
DBusError *error)
{
DBusMessage *message, *reply;
dbus_uint32_t uid;
_dbus_return_val_if_fail (connection != NULL, DBUS_UID_UNSET);
_dbus_return_val_if_fail (name != NULL, DBUS_UID_UNSET);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), DBUS_UID_UNSET);
_dbus_return_val_if_error_is_set (error, DBUS_UID_UNSET);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"GetConnectionUnixUser");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return DBUS_UID_UNSET;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
{
dbus_message_unref (message);
_DBUS_SET_OOM (error);
return DBUS_UID_UNSET;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return DBUS_UID_UNSET;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return DBUS_UID_UNSET;
}
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_UINT32, &uid,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return DBUS_UID_UNSET;
}
dbus_message_unref (reply);
return (unsigned long) uid;
}
char*
dbus_bus_get_id (DBusConnection *connection,
DBusError *error)
{
DBusMessage *message, *reply;
char *id;
const char *v_STRING;
_dbus_return_val_if_fail (connection != NULL, NULL);
_dbus_return_val_if_error_is_set (error, NULL);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"GetId");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return NULL;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return NULL;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return NULL;
}
v_STRING = NULL;
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_STRING, &v_STRING,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return NULL;
}
id = _dbus_strdup (v_STRING); /* may be NULL */
dbus_message_unref (reply);
if (id == NULL)
_DBUS_SET_OOM (error);
/* FIXME it might be nice to cache the ID locally */
return id;
}
int
dbus_bus_request_name (DBusConnection *connection,
const char *name,
unsigned int flags,
DBusError *error)
{
DBusMessage *message, *reply;
dbus_uint32_t result;
_dbus_return_val_if_fail (connection != NULL, 0);
_dbus_return_val_if_fail (name != NULL, 0);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 0);
_dbus_return_val_if_error_is_set (error, 0);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"RequestName");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return -1;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_UINT32, &flags,
DBUS_TYPE_INVALID))
{
dbus_message_unref (message);
_DBUS_SET_OOM (error);
return -1;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return -1;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return -1;
}
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_UINT32, &result,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return -1;
}
dbus_message_unref (reply);
return result;
}
int
dbus_bus_release_name (DBusConnection *connection,
const char *name,
DBusError *error)
{
DBusMessage *message, *reply;
dbus_uint32_t result;
_dbus_return_val_if_fail (connection != NULL, 0);
_dbus_return_val_if_fail (name != NULL, 0);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), 0);
_dbus_return_val_if_error_is_set (error, 0);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"ReleaseName");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return -1;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
{
dbus_message_unref (message);
_DBUS_SET_OOM (error);
return -1;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1,
error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return -1;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return -1;
}
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_UINT32, &result,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return -1;
}
dbus_message_unref (reply);
return result;
}
dbus_bool_t
dbus_bus_name_has_owner (DBusConnection *connection,
const char *name,
DBusError *error)
{
DBusMessage *message, *reply;
dbus_bool_t exists;
_dbus_return_val_if_fail (connection != NULL, FALSE);
_dbus_return_val_if_fail (name != NULL, FALSE);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), FALSE);
_dbus_return_val_if_error_is_set (error, FALSE);
message = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"NameHasOwner");
if (message == NULL)
{
_DBUS_SET_OOM (error);
return FALSE;
}
if (!dbus_message_append_args (message,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_INVALID))
{
dbus_message_unref (message);
_DBUS_SET_OOM (error);
return FALSE;
}
reply = dbus_connection_send_with_reply_and_block (connection, message, -1, error);
dbus_message_unref (message);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return FALSE;
}
if (!dbus_message_get_args (reply, error,
DBUS_TYPE_BOOLEAN, &exists,
DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return FALSE;
}
dbus_message_unref (reply);
return exists;
}
dbus_bool_t
dbus_bus_start_service_by_name (DBusConnection *connection,
const char *name,
dbus_uint32_t flags,
dbus_uint32_t *result,
DBusError *error)
{
DBusMessage *msg;
DBusMessage *reply;
_dbus_return_val_if_fail (connection != NULL, FALSE);
_dbus_return_val_if_fail (_dbus_check_is_valid_bus_name (name), FALSE);
msg = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"StartServiceByName");
if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, &name,
DBUS_TYPE_UINT32, &flags, DBUS_TYPE_INVALID))
{
dbus_message_unref (msg);
_DBUS_SET_OOM (error);
return FALSE;
}
reply = dbus_connection_send_with_reply_and_block (connection, msg,
-1, error);
dbus_message_unref (msg);
if (reply == NULL)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
return FALSE;
}
if (dbus_set_error_from_message (error, reply))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return FALSE;
}
if (result != NULL &&
!dbus_message_get_args (reply, error, DBUS_TYPE_UINT32,
result, DBUS_TYPE_INVALID))
{
_DBUS_ASSERT_ERROR_IS_SET (error);
dbus_message_unref (reply);
return FALSE;
}
dbus_message_unref (reply);
return TRUE;
}
static void
send_no_return_values (DBusConnection *connection,
DBusMessage *msg,
DBusError *error)
{
if (error)
{
/* Block to check success codepath */
DBusMessage *reply;
reply = dbus_connection_send_with_reply_and_block (connection, msg,
-1, error);
if (reply == NULL)
_DBUS_ASSERT_ERROR_IS_SET (error);
else
dbus_message_unref (reply);
}
else
{
/* Silently-fail nonblocking codepath */
dbus_message_set_no_reply (msg, TRUE);
dbus_connection_send (connection, msg, NULL);
}
}
void
dbus_bus_add_match (DBusConnection *connection,
const char *rule,
DBusError *error)
{
DBusMessage *msg;
_dbus_return_if_fail (rule != NULL);
msg = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"AddMatch");
if (msg == NULL)
{
_DBUS_SET_OOM (error);
return;
}
if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, &rule,
DBUS_TYPE_INVALID))
{
dbus_message_unref (msg);
_DBUS_SET_OOM (error);
return;
}
send_no_return_values (connection, msg, error);
dbus_message_unref (msg);
}
void
dbus_bus_remove_match (DBusConnection *connection,
const char *rule,
DBusError *error)
{
DBusMessage *msg;
_dbus_return_if_fail (rule != NULL);
msg = dbus_message_new_method_call (DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"RemoveMatch");
if (!dbus_message_append_args (msg, DBUS_TYPE_STRING, &rule,
DBUS_TYPE_INVALID))
{
dbus_message_unref (msg);
_DBUS_SET_OOM (error);
return;
}
send_no_return_values (connection, msg, error);
dbus_message_unref (msg);
}