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/* dbus-server-launchd.c Server methods for interacting with launchd.
* Copyright (C) 2007, Tanner Lovelace <lovelace@wayfarer.org>
* Copyright (C) 2008, Colin Walters <walters@verbum.org>
* Copyright (C) 2008-2009, Benjamin Reed <rangerrick@befunk.com>
* Copyright (C) 2009, Jonas Bähr <jonas.baehr@web.de>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <config.h>
#include "dbus-server-launchd.h"
/**
* @defgroup DBusServerLaunchd DBusServer implementations for Launchd
* @ingroup DBusInternals
* @brief Implementation details of DBusServer with Launchd support
*
* @{
*/
#ifdef DBUS_ENABLE_LAUNCHD
#include <launch.h>
#include <errno.h>
#include "dbus-misc.h"
#include "dbus-server-socket.h"
/* put other private launchd functions here */
#endif /* DBUS_ENABLE_LAUNCHD */
/**
* @brief Creates a new server from launchd.
*
* launchd has allocaed a socket for us. We now query launchd for the
* file descriptor of this socket and create a server on it.
* In addition we inherit launchd's environment which holds a variable
* containing the path to the socket. This is used to init the server's
* address which is passed to autolaunched services.
*
* @param launchd_env_var the environment variable which holds the unix path to the socket
* @param error location to store reason for failure.
* @returns the new server, or #NULL on failure.
*/
DBusServer *
_dbus_server_new_for_launchd (const char *launchd_env_var, DBusError * error)
{
#ifdef DBUS_ENABLE_LAUNCHD
DBusServer *server;
DBusString address;
int launchd_fd;
launch_data_t sockets_dict, checkin_response;
launch_data_t checkin_request;
launch_data_t listening_fd_array, listening_fd;
launch_data_t environment_dict, environment_param;
const char *launchd_socket_path, *display;
launchd_socket_path = _dbus_getenv (launchd_env_var);
display = _dbus_getenv ("DISPLAY");
_DBUS_ASSERT_ERROR_IS_CLEAR (error);
if (launchd_socket_path == NULL || *launchd_socket_path == '\0')
{
dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
"launchd's environment variable %s is empty, but should contain a socket path.\n", launchd_env_var);
return NULL;
}
if (!_dbus_string_init (&address))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
return NULL;
}
if (!_dbus_string_append (&address, "unix:path="))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto l_failed_0;
}
if (!_dbus_string_append (&address, launchd_socket_path))
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
goto l_failed_0;
}
if ((checkin_request = launch_data_new_string (LAUNCH_KEY_CHECKIN)) == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_MEMORY,
"launch_data_new_string(\"%s\") Unable to create string.\n",
LAUNCH_KEY_CHECKIN);
goto l_failed_0;
}
if ((checkin_response = launch_msg (checkin_request)) == NULL)
{
dbus_set_error (error, DBUS_ERROR_IO_ERROR,
"launch_msg(\"%s\") IPC failure: %s\n",
LAUNCH_KEY_CHECKIN, strerror (errno));
goto l_failed_0;
}
if (LAUNCH_DATA_ERRNO == launch_data_get_type (checkin_response))
{
dbus_set_error (error, DBUS_ERROR_FAILED, "Check-in failed: %s\n",
strerror (launch_data_get_errno (checkin_response)));
goto l_failed_0;
}
sockets_dict =
launch_data_dict_lookup (checkin_response, LAUNCH_JOBKEY_SOCKETS);
if (NULL == sockets_dict)
{
dbus_set_error (error, DBUS_ERROR_IO_ERROR,
"No sockets found to answer requests on!\n");
goto l_failed_0;
}
listening_fd_array =
launch_data_dict_lookup (sockets_dict, "unix_domain_listener");
if (NULL == listening_fd_array)
{
dbus_set_error (error, DBUS_ERROR_IO_ERROR,
"No known sockets found to answer requests on!\n");
goto l_failed_0;
}
if (launch_data_array_get_count (listening_fd_array) != 1)
{
dbus_set_error (error, DBUS_ERROR_LIMITS_EXCEEDED,
"Expected 1 socket from launchd, got %d.\n",
launch_data_array_get_count (listening_fd_array));
goto l_failed_0;
}
listening_fd = launch_data_array_get_index (listening_fd_array, 0);
launchd_fd = launch_data_get_fd (listening_fd);
_dbus_fd_set_close_on_exec (launchd_fd);
if (launchd_fd < 0)
{
_DBUS_ASSERT_ERROR_IS_SET (error);
goto l_failed_0;
if (display == NULL || *display == '\0')
{
environment_dict = launch_data_dict_lookup (checkin_response, LAUNCH_JOBKEY_USERENVIRONMENTVARIABLES);
if (NULL == environment_dict)
{
_dbus_warn ("Unable to retrieve user environment from launchd.");
}
else
{
environment_param = launch_data_dict_lookup (environment_dict, "DISPLAY");
if (NULL == environment_param)
{
_dbus_warn ("Unable to retrieve DISPLAY from launchd.");
}
else
{
display = launch_data_get_string(environment_param);
dbus_setenv ("DISPLAY", display);
}
}
}
}
server = _dbus_server_new_for_socket (&launchd_fd, 1, &address, 0);
if (server == NULL)
{
dbus_set_error (error, DBUS_ERROR_NO_SERVER,
"Unable to listen on launchd fd %d.", launchd_fd);
goto l_failed_0;
}
_dbus_string_free (&address);
return server;
l_failed_0:
_dbus_string_free (&address);
return NULL;
#else /* DBUS_ENABLE_LAUNCHD */
dbus_set_error (error, DBUS_ERROR_BAD_ADDRESS,
"address type 'launchd' requested, but launchd support not compiled in");
return NULL;
#endif
}
/** @} */
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