/* dbus-server-launchd.c Server methods for interacting with launchd. * Copyright (C) 2007, Tanner Lovelace * Copyright (C) 2008, Colin Walters * Copyright (C) 2008-2009, Benjamin Reed * Copyright (C) 2009, Jonas Bähr * * 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 #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 #include #include "dbus-misc.h" #include "dbus-server-socket.h" #include "dbus-sysdeps-unix.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 } /** @} */