/*

* 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 "config.h"

#ifdef WITH_DBUS

#include <ev.h>

#include <dbus/dbus.h>

#include <unistd.h>

#include <fcntl.h>

#include "dbus.h"

#include "widget.h"

#include "client.h"

extern awesome_t globalconf;

static DBusError err;

static DBusConnection *dbus_connection = NULL;

ev_io dbusio = { .fd = -1 };

/** Check a dbus object path format and its number of element.

* \param path The path.

* \param nelem The number of element it should have.

* \return true if the path is ok, false otherwise.

*/

static bool

a_dbus_path_check(char **path, int nelem)

{

int i;

for(i = 0; path[i]; i++);

if(i != nelem)

return false;

return (!a_strcmp(path[0], "org") && !a_strcmp(path[1], "awesome"));

}

static void

a_dbus_process_request_do(DBusMessage *msg)

{

int i;

DBusMessageIter iter;

char **path, *cmd;

if(!dbus_message_get_path_decomposed(msg, &path))

return;

/* path is:

* /org/awesome */

if(!a_dbus_path_check(path, 2))

goto bailout;

if(!dbus_message_iter_init(msg, &iter))

{

dbus_error_free(&err);

goto bailout;

}

else if(DBUS_TYPE_STRING != dbus_message_iter_get_arg_type(&iter))

{

dbus_error_free(&err);

goto bailout;

}

else

dbus_message_iter_get_basic(&iter, &cmd);

luaA_dostring(globalconf.L, cmd);

bailout:

for(i = 0; path[i]; i++)

p_delete(&path[i]);

p_delete(&path);

}

static void

a_dbus_process_requests(EV_P_ ev_io *w, int revents)

{

DBusMessage *msg;

int nmsg = 0;

if(!dbus_connection && !a_dbus_init())

return;

while(true)

{

dbus_connection_read_write(dbus_connection, 0);

if(!(msg = dbus_connection_pop_message(dbus_connection)))

break;

if(dbus_message_is_signal(msg, DBUS_INTERFACE_LOCAL, "Disconnected"))

{

a_dbus_cleanup();

dbus_message_unref(msg);

return;

}

else if(dbus_message_is_method_call(msg, "org.awesome", "do"))

a_dbus_process_request_do(msg);

dbus_message_unref(msg);

nmsg++;

}

if(nmsg)

dbus_connection_flush(dbus_connection);

}

bool

a_dbus_init(void)

{

bool ret;

int fd;

dbus_error_init(&err);

dbus_connection = dbus_bus_get(DBUS_BUS_SESSION, &err);

if(dbus_error_is_set(&err))

{

warn("D-Bus system bus connection failed: %s", err.message);

dbus_connection = NULL;

dbus_error_free(&err);

return false;

}

dbus_connection_set_exit_on_disconnect(dbus_connection, FALSE);

ret = dbus_bus_request_name(dbus_connection, "org.awesome", 0, &err);

if(dbus_error_is_set(&err))

{

warn("failed to request D-Bus name: %s", err.message);

a_dbus_cleanup();

return false;

}

if(ret != DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER)

{

warn("not primary D-Bus name owner");

a_dbus_cleanup();

return false;

}

if(!dbus_connection_get_unix_fd(dbus_connection, &fd))

{

warn("cannot get D-Bus connection file descriptor");

a_dbus_cleanup();

return false;

}

fcntl(fd, F_SETFD, FD_CLOEXEC);

ev_io_init(&dbusio, a_dbus_process_requests, fd, EV_READ);

ev_io_start(EV_DEFAULT_UC_ &dbusio);

ev_unref(EV_DEFAULT_UC);

return true;

}

void

a_dbus_cleanup(void)

{

if(!dbus_connection)

return;

dbus_error_free(&err);

if (dbusio.fd >= 0) {

ev_ref(EV_DEFAULT_UC);

ev_io_stop(EV_DEFAULT_UC_ &dbusio);

dbusio.fd = -1;

}

/* This is a shared connection owned by libdbus

* Do not close it, only unref

*/

dbus_connection_unref(dbus_connection);

dbus_connection = NULL;

}

#else /* HAVE_DBUS */

#include "dbus.h"

bool

a_dbus_init(void)

{

return false;

}

void

a_dbus_cleanup(void)

{

/* empty */

}

#endif

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