awesome/dbus.c

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/*
* dbus.c - awesome dbus support
*
* Copyright © 2008 Julien Danjou <julien@danjou.info>
*
* 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 <dbus/dbus.h>
#include "dbus.h"
#include "common/util.h"
static DBusError err;
static DBusConnection *conn = NULL;
static void
a_dbus_process_widget_tell(DBusMessage *req)
{
char *arg, *path = NULL;
DBusMessageIter iter;
if(!dbus_message_iter_init(req, &iter))
{
warn("message has no argument: %s\n", err.message);
dbus_error_free(&err);
return;
}
else if(DBUS_TYPE_STRING != dbus_message_iter_get_arg_type(&iter))
{
warn("argument must be a string");
dbus_error_free(&err);
return;
}
else
dbus_message_iter_get_basic(&iter, &arg);
p_delete(&path);
}
void
a_dbus_process_requests(void)
{
DBusMessage *msg;
int nmsg = 0;
if(!conn && !a_dbus_init())
return;
while(true)
{
dbus_connection_read_write(conn, 0);
if(!(msg = dbus_connection_pop_message(conn)))
break;
if(dbus_message_is_method_call(msg, "org.awesome.statusbar.widget", "tell"))
a_dbus_process_widget_tell(msg);
else if(dbus_message_is_signal(msg, DBUS_INTERFACE_LOCAL, "Disconnected"))
{
a_dbus_cleanup();
dbus_message_unref(msg);
return;
}
dbus_message_unref(msg);
nmsg++;
}
if(nmsg)
dbus_connection_flush(conn);
}
bool
a_dbus_init(void)
{
bool ret;
dbus_error_init(&err);
conn = dbus_bus_get(DBUS_BUS_SESSION, &err);
if(dbus_error_is_set(&err))
{
warn("DBus system bus connection failed: %s\n", err.message);
conn = NULL;
dbus_error_free(&err);
return false;
}
dbus_connection_set_exit_on_disconnect(conn, FALSE);
ret = dbus_bus_request_name(conn, "org.awesome", 0, &err);
if(dbus_error_is_set(&err))
{
warn("failed to request DBus name: %s\n", err.message);
a_dbus_cleanup();
return false;
}
if(ret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)
{
warn("not primary DBus name owner\n");
a_dbus_cleanup();
return false;
}
return true;
}
void
a_dbus_cleanup(void)
{
if(!conn)
return;
dbus_error_free(&err);
/* This is a shared connection owned by libdbus
* Do not close it, only unref
*/
dbus_connection_unref(conn);
conn = NULL;
}
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