/* GDBus - GLib D-Bus Library * * Copyright (C) 2008-2010 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General * Public License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307, USA. * * Author: David Zeuthen */ #include "config.h" #include #include #include #include #include "gioerror.h" #include "gdbusutils.h" #include "gdbusaddress.h" #include "gdbuserror.h" #include "gioenumtypes.h" #include "gnetworkaddress.h" #include "gsocketclient.h" #include "giostream.h" #include "gasyncresult.h" #include "gsimpleasyncresult.h" #include "gdbusprivate.h" #ifdef G_OS_UNIX #include #include #endif #include "glibintl.h" /** * SECTION:gdbusaddress * @title: D-Bus Addresses * @short_description: D-Bus connection endpoints * @include: gio/gio.h * * Routines for working with D-Bus addresses. A D-Bus address is a string * like "unix:tmpdir=/tmp/my-app-name". The exact format of addresses * is explained in detail in the D-Bus specification. */ static gchar *get_session_address_platform_specific (GError **error); /* ---------------------------------------------------------------------------------------------------- */ /** * g_dbus_is_address: * @string: A string. * * Checks if @string is a D-Bus address. * * This doesn't check if @string is actually supported by #GDBusServer * or #GDBusConnection - use g_dbus_is_supported_address() to do more * checks. * * Returns: %TRUE if @string is a valid D-Bus address, %FALSE otherwise. * * Since: 2.26 */ gboolean g_dbus_is_address (const gchar *string) { guint n; gchar **a; gboolean ret; ret = FALSE; g_return_val_if_fail (string != NULL, FALSE); a = g_strsplit (string, ";", 0); if (a[0] == NULL) goto out; for (n = 0; a[n] != NULL; n++) { if (!_g_dbus_address_parse_entry (a[n], NULL, NULL, NULL)) goto out; } ret = TRUE; out: g_strfreev (a); return ret; } static gboolean is_valid_unix (const gchar *address_entry, GHashTable *key_value_pairs, GError **error) { gboolean ret; GList *keys; GList *l; const gchar *path; const gchar *tmpdir; const gchar *abstract; ret = FALSE; keys = NULL; path = NULL; tmpdir = NULL; abstract = NULL; keys = g_hash_table_get_keys (key_value_pairs); for (l = keys; l != NULL; l = l->next) { const gchar *key = l->data; if (g_strcmp0 (key, "path") == 0) path = g_hash_table_lookup (key_value_pairs, key); else if (g_strcmp0 (key, "tmpdir") == 0) tmpdir = g_hash_table_lookup (key_value_pairs, key); else if (g_strcmp0 (key, "abstract") == 0) abstract = g_hash_table_lookup (key_value_pairs, key); else { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Unsupported key `%s' in address entry `%s'"), key, address_entry); goto out; } } if (path != NULL) { if (tmpdir != NULL || abstract != NULL) goto meaningless; } else if (tmpdir != NULL) { if (path != NULL || abstract != NULL) goto meaningless; } else if (abstract != NULL) { if (path != NULL || tmpdir != NULL) goto meaningless; } else { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Address `%s' is invalid (need exactly one of path, tmpdir or abstract keys)"), address_entry); goto out; } ret= TRUE; goto out; meaningless: g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Meaningless key/value pair combination in address entry `%s'"), address_entry); out: g_list_free (keys); return ret; } static gboolean is_valid_nonce_tcp (const gchar *address_entry, GHashTable *key_value_pairs, GError **error) { gboolean ret; GList *keys; GList *l; const gchar *host; const gchar *port; const gchar *family; const gchar *nonce_file; gint port_num; gchar *endp; ret = FALSE; keys = NULL; host = NULL; port = NULL; family = NULL; nonce_file = NULL; keys = g_hash_table_get_keys (key_value_pairs); for (l = keys; l != NULL; l = l->next) { const gchar *key = l->data; if (g_strcmp0 (key, "host") == 0) host = g_hash_table_lookup (key_value_pairs, key); else if (g_strcmp0 (key, "port") == 0) port = g_hash_table_lookup (key_value_pairs, key); else if (g_strcmp0 (key, "family") == 0) family = g_hash_table_lookup (key_value_pairs, key); else if (g_strcmp0 (key, "noncefile") == 0) nonce_file = g_hash_table_lookup (key_value_pairs, key); else { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Unsupported key `%s' in address entry `%s'"), key, address_entry); goto out; } } if (port != NULL) { port_num = strtol (port, &endp, 10); if ((*port == '\0' || *endp != '\0') || port_num < 0 || port_num >= 65536) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the port attribute is malformed"), address_entry); goto out; } } if (family != NULL && !(g_strcmp0 (family, "ipv4") == 0 || g_strcmp0 (family, "ipv6") == 0)) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the family attribute is malformed"), address_entry); goto out; } if (host != NULL) { /* TODO: validate host */ } nonce_file = nonce_file; /* To avoid -Wunused-but-set-variable */ ret= TRUE; out: g_list_free (keys); return ret; } static gboolean is_valid_tcp (const gchar *address_entry, GHashTable *key_value_pairs, GError **error) { gboolean ret; GList *keys; GList *l; const gchar *host; const gchar *port; const gchar *family; gint port_num; gchar *endp; ret = FALSE; keys = NULL; host = NULL; port = NULL; family = NULL; keys = g_hash_table_get_keys (key_value_pairs); for (l = keys; l != NULL; l = l->next) { const gchar *key = l->data; if (g_strcmp0 (key, "host") == 0) host = g_hash_table_lookup (key_value_pairs, key); else if (g_strcmp0 (key, "port") == 0) port = g_hash_table_lookup (key_value_pairs, key); else if (g_strcmp0 (key, "family") == 0) family = g_hash_table_lookup (key_value_pairs, key); else { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Unsupported key `%s' in address entry `%s'"), key, address_entry); goto out; } } if (port != NULL) { port_num = strtol (port, &endp, 10); if ((*port == '\0' || *endp != '\0') || port_num < 0 || port_num >= 65536) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the port attribute is malformed"), address_entry); goto out; } } if (family != NULL && !(g_strcmp0 (family, "ipv4") == 0 || g_strcmp0 (family, "ipv6") == 0)) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the family attribute is malformed"), address_entry); goto out; } if (host != NULL) { /* TODO: validate host */ } ret= TRUE; out: g_list_free (keys); return ret; } /** * g_dbus_is_supported_address: * @string: A string. * @error: Return location for error or %NULL. * * Like g_dbus_is_address() but also checks if the library suppors the * transports in @string and that key/value pairs for each transport * are valid. * * Returns: %TRUE if @string is a valid D-Bus address that is * supported by this library, %FALSE if @error is set. * * Since: 2.26 */ gboolean g_dbus_is_supported_address (const gchar *string, GError **error) { guint n; gchar **a; gboolean ret; ret = FALSE; g_return_val_if_fail (string != NULL, FALSE); g_return_val_if_fail (error == NULL || *error == NULL, FALSE); a = g_strsplit (string, ";", 0); for (n = 0; a[n] != NULL; n++) { gchar *transport_name; GHashTable *key_value_pairs; gboolean supported; if (!_g_dbus_address_parse_entry (a[n], &transport_name, &key_value_pairs, error)) goto out; supported = FALSE; if (g_strcmp0 (transport_name, "unix") == 0) supported = is_valid_unix (a[n], key_value_pairs, error); else if (g_strcmp0 (transport_name, "tcp") == 0) supported = is_valid_tcp (a[n], key_value_pairs, error); else if (g_strcmp0 (transport_name, "nonce-tcp") == 0) supported = is_valid_nonce_tcp (a[n], key_value_pairs, error); else if (g_strcmp0 (a[n], "autolaunch:") == 0) supported = TRUE; g_free (transport_name); g_hash_table_unref (key_value_pairs); if (!supported) goto out; } ret = TRUE; out: g_strfreev (a); g_assert (ret || (!ret && (error == NULL || *error != NULL))); return ret; } gboolean _g_dbus_address_parse_entry (const gchar *address_entry, gchar **out_transport_name, GHashTable **out_key_value_pairs, GError **error) { gboolean ret; GHashTable *key_value_pairs; gchar *transport_name; gchar **kv_pairs; const gchar *s; guint n; ret = FALSE; kv_pairs = NULL; transport_name = NULL; key_value_pairs = NULL; s = strchr (address_entry, ':'); if (s == NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Address element `%s', does not contain a colon (:)"), address_entry); goto out; } transport_name = g_strndup (address_entry, s - address_entry); key_value_pairs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); kv_pairs = g_strsplit (s + 1, ",", 0); for (n = 0; kv_pairs != NULL && kv_pairs[n] != NULL; n++) { const gchar *kv_pair = kv_pairs[n]; gchar *key; gchar *value; s = strchr (kv_pair, '='); if (s == NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Key/Value pair %d, `%s', in address element `%s', does not contain an equal sign"), n, kv_pair, address_entry); goto out; } key = g_uri_unescape_segment (kv_pair, s, NULL); value = g_uri_unescape_segment (s + 1, kv_pair + strlen (kv_pair), NULL); if (key == NULL || value == NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error unescaping key or value in Key/Value pair %d, `%s', in address element `%s'"), n, kv_pair, address_entry); g_free (key); g_free (value); goto out; } g_hash_table_insert (key_value_pairs, key, value); } ret = TRUE; out: g_strfreev (kv_pairs); if (ret) { if (out_transport_name != NULL) *out_transport_name = transport_name; else g_free (transport_name); if (out_key_value_pairs != NULL) *out_key_value_pairs = key_value_pairs; else if (key_value_pairs != NULL) g_hash_table_unref (key_value_pairs); } else { g_free (transport_name); if (key_value_pairs != NULL) g_hash_table_unref (key_value_pairs); } return ret; } /* ---------------------------------------------------------------------------------------------------- */ static GIOStream * g_dbus_address_try_connect_one (const gchar *address_entry, gchar **out_guid, GCancellable *cancellable, GError **error); /* TODO: Declare an extension point called GDBusTransport (or similar) * and move code below to extensions implementing said extension * point. That way we can implement a D-Bus transport over X11 without * making libgio link to libX11... */ static GIOStream * g_dbus_address_connect (const gchar *address_entry, const gchar *transport_name, GHashTable *key_value_pairs, GCancellable *cancellable, GError **error) { GIOStream *ret; GSocketConnectable *connectable; const gchar *nonce_file; connectable = NULL; ret = NULL; nonce_file = NULL; if (FALSE) { } #ifdef G_OS_UNIX else if (g_strcmp0 (transport_name, "unix") == 0) { const gchar *path; const gchar *abstract; path = g_hash_table_lookup (key_value_pairs, "path"); abstract = g_hash_table_lookup (key_value_pairs, "abstract"); if ((path == NULL && abstract == NULL) || (path != NULL && abstract != NULL)) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the unix transport requires exactly one of the " "keys `path' or `abstract' to be set"), address_entry); } else if (path != NULL) { connectable = G_SOCKET_CONNECTABLE (g_unix_socket_address_new (path)); } else if (abstract != NULL) { connectable = G_SOCKET_CONNECTABLE (g_unix_socket_address_new_with_type (abstract, -1, G_UNIX_SOCKET_ADDRESS_ABSTRACT)); } else { g_assert_not_reached (); } } #endif else if (g_strcmp0 (transport_name, "tcp") == 0 || g_strcmp0 (transport_name, "nonce-tcp") == 0) { const gchar *s; const gchar *host; glong port; gchar *endp; gboolean is_nonce; is_nonce = (g_strcmp0 (transport_name, "nonce-tcp") == 0); host = g_hash_table_lookup (key_value_pairs, "host"); if (host == NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the host attribute is missing or malformed"), address_entry); goto out; } s = g_hash_table_lookup (key_value_pairs, "port"); if (s == NULL) s = "0"; port = strtol (s, &endp, 10); if ((*s == '\0' || *endp != '\0') || port < 0 || port >= 65536) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the port attribute is missing or malformed"), address_entry); goto out; } if (is_nonce) { nonce_file = g_hash_table_lookup (key_value_pairs, "noncefile"); if (nonce_file == NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error in address `%s' - the noncefile attribute is missing or malformed"), address_entry); goto out; } } /* TODO: deal with family key/value-pair */ connectable = g_network_address_new (host, port); } else if (g_strcmp0 (address_entry, "autolaunch:") == 0) { gchar *autolaunch_address; autolaunch_address = get_session_address_platform_specific (error); if (autolaunch_address != NULL) { ret = g_dbus_address_try_connect_one (autolaunch_address, NULL, cancellable, error); g_free (autolaunch_address); goto out; } else { g_prefix_error (error, _("Error auto-launching: ")); } } else { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Unknown or unsupported transport `%s' for address `%s'"), transport_name, address_entry); } if (connectable != NULL) { GSocketClient *client; GSocketConnection *connection; g_assert (ret == NULL); client = g_socket_client_new (); connection = g_socket_client_connect (client, connectable, cancellable, error); g_object_unref (connectable); g_object_unref (client); if (connection == NULL) goto out; ret = G_IO_STREAM (connection); if (nonce_file != NULL) { gchar nonce_contents[16 + 1]; size_t num_bytes_read; FILE *f; /* be careful to read only 16 bytes - we also check that the file is only 16 bytes long */ f = fopen (nonce_file, "rb"); if (f == NULL) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error opening nonce file `%s': %s"), nonce_file, g_strerror (errno)); g_object_unref (ret); ret = NULL; goto out; } num_bytes_read = fread (nonce_contents, sizeof (gchar), 16 + 1, f); if (num_bytes_read != 16) { if (num_bytes_read == 0) { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error reading from nonce file `%s': %s"), nonce_file, g_strerror (errno)); } else { g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("Error reading from nonce file `%s', expected 16 bytes, got %d"), nonce_file, (gint) num_bytes_read); } g_object_unref (ret); ret = NULL; fclose (f); goto out; } fclose (f); if (!g_output_stream_write_all (g_io_stream_get_output_stream (ret), nonce_contents, 16, NULL, cancellable, error)) { g_prefix_error (error, _("Error writing contents of nonce file `%s' to stream:"), nonce_file); g_object_unref (ret); ret = NULL; goto out; } } } out: return ret; } static GIOStream * g_dbus_address_try_connect_one (const gchar *address_entry, gchar **out_guid, GCancellable *cancellable, GError **error) { GIOStream *ret; GHashTable *key_value_pairs; gchar *transport_name; const gchar *guid; ret = NULL; transport_name = NULL; key_value_pairs = NULL; if (!_g_dbus_address_parse_entry (address_entry, &transport_name, &key_value_pairs, error)) goto out; ret = g_dbus_address_connect (address_entry, transport_name, key_value_pairs, cancellable, error); if (ret == NULL) goto out; guid = g_hash_table_lookup (key_value_pairs, "guid"); if (guid != NULL && out_guid != NULL) *out_guid = g_strdup (guid); out: g_free (transport_name); if (key_value_pairs != NULL) g_hash_table_unref (key_value_pairs); return ret; } /* ---------------------------------------------------------------------------------------------------- */ typedef struct { gchar *address; GIOStream *stream; gchar *guid; } GetStreamData; static void get_stream_data_free (GetStreamData *data) { g_free (data->address); if (data->stream != NULL) g_object_unref (data->stream); g_free (data->guid); g_free (data); } static void get_stream_thread_func (GSimpleAsyncResult *res, GObject *object, GCancellable *cancellable) { GetStreamData *data; GError *error; data = g_simple_async_result_get_op_res_gpointer (res); error = NULL; data->stream = g_dbus_address_get_stream_sync (data->address, &data->guid, cancellable, &error); if (data->stream == NULL) g_simple_async_result_take_error (res, error); } /** * g_dbus_address_get_stream: * @address: A valid D-Bus address. * @cancellable: A #GCancellable or %NULL. * @callback: A #GAsyncReadyCallback to call when the request is satisfied. * @user_data: Data to pass to @callback. * * Asynchronously connects to an endpoint specified by @address and * sets up the connection so it is in a state to run the client-side * of the D-Bus authentication conversation. * * When the operation is finished, @callback will be invoked. You can * then call g_dbus_address_get_stream_finish() to get the result of * the operation. * * This is an asynchronous failable function. See * g_dbus_address_get_stream_sync() for the synchronous version. * * Since: 2.26 */ void g_dbus_address_get_stream (const gchar *address, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data) { GSimpleAsyncResult *res; GetStreamData *data; g_return_if_fail (address != NULL); res = g_simple_async_result_new (NULL, callback, user_data, g_dbus_address_get_stream); g_simple_async_result_set_check_cancellable (res, cancellable); data = g_new0 (GetStreamData, 1); data->address = g_strdup (address); g_simple_async_result_set_op_res_gpointer (res, data, (GDestroyNotify) get_stream_data_free); g_simple_async_result_run_in_thread (res, get_stream_thread_func, G_PRIORITY_DEFAULT, cancellable); g_object_unref (res); } /** * g_dbus_address_get_stream_finish: * @res: A #GAsyncResult obtained from the GAsyncReadyCallback passed to g_dbus_address_get_stream(). * @out_guid: %NULL or return location to store the GUID extracted from @address, if any. * @error: Return location for error or %NULL. * * Finishes an operation started with g_dbus_address_get_stream(). * * Returns: (transfer full): A #GIOStream or %NULL if @error is set. * * Since: 2.26 */ GIOStream * g_dbus_address_get_stream_finish (GAsyncResult *res, gchar **out_guid, GError **error) { GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res); GetStreamData *data; GIOStream *ret; g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_address_get_stream); ret = NULL; data = g_simple_async_result_get_op_res_gpointer (simple); if (g_simple_async_result_propagate_error (simple, error)) goto out; ret = g_object_ref (data->stream); if (out_guid != NULL) *out_guid = g_strdup (data->guid); out: return ret; } /** * g_dbus_address_get_stream_sync: * @address: A valid D-Bus address. * @out_guid: %NULL or return location to store the GUID extracted from @address, if any. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously connects to an endpoint specified by @address and * sets up the connection so it is in a state to run the client-side * of the D-Bus authentication conversation. * * This is a synchronous failable function. See * g_dbus_address_get_stream() for the asynchronous version. * * Returns: (transfer full): A #GIOStream or %NULL if @error is set. * * Since: 2.26 */ GIOStream * g_dbus_address_get_stream_sync (const gchar *address, gchar **out_guid, GCancellable *cancellable, GError **error) { GIOStream *ret; gchar **addr_array; guint n; GError *last_error; g_return_val_if_fail (address != NULL, NULL); g_return_val_if_fail (error == NULL || *error == NULL, NULL); ret = NULL; last_error = NULL; addr_array = g_strsplit (address, ";", 0); if (addr_array != NULL && addr_array[0] == NULL) { last_error = g_error_new_literal (G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT, _("The given address is empty")); goto out; } for (n = 0; addr_array != NULL && addr_array[n] != NULL; n++) { const gchar *addr = addr_array[n]; GError *this_error; this_error = NULL; ret = g_dbus_address_try_connect_one (addr, out_guid, cancellable, &this_error); if (ret != NULL) { goto out; } else { g_assert (this_error != NULL); if (last_error != NULL) g_error_free (last_error); last_error = this_error; } } out: if (ret != NULL) { if (last_error != NULL) g_error_free (last_error); } else { g_assert (last_error != NULL); g_propagate_error (error, last_error); } g_strfreev (addr_array); return ret; } /* ---------------------------------------------------------------------------------------------------- */ #ifdef G_OS_UNIX static gchar * get_session_address_dbus_launch (GError **error) { gchar *ret; gchar *machine_id; gchar *command_line; gchar *launch_stdout; gchar *launch_stderr; gint exit_status; gchar *old_dbus_verbose; gboolean restore_dbus_verbose; ret = NULL; machine_id = NULL; command_line = NULL; launch_stdout = NULL; launch_stderr = NULL; restore_dbus_verbose = FALSE; old_dbus_verbose = NULL; machine_id = _g_dbus_get_machine_id (error); if (machine_id == NULL) { g_prefix_error (error, _("Cannot spawn a message bus without a machine-id: ")); goto out; } /* We're using private libdbus facilities here. When everything * (X11, Mac OS X, Windows) is spec'ed out correctly (not even the * X11 property is correctly documented right now) we should * consider using the spec instead of dbus-launch. * * --autolaunch=MACHINEID * This option implies that dbus-launch should scan for a previ‐ * ously-started session and reuse the values found there. If no * session is found, it will start a new session. The --exit-with- * session option is implied if --autolaunch is given. This option * is for the exclusive use of libdbus, you do not want to use it * manually. It may change in the future. */ /* TODO: maybe provide a variable for where to look for the dbus-launch binary? */ command_line = g_strdup_printf ("dbus-launch --autolaunch=%s --binary-syntax --close-stderr", machine_id); if (G_UNLIKELY (_g_dbus_debug_address ())) { _g_dbus_debug_print_lock (); g_print ("GDBus-debug:Address: Running `%s' to get bus address (possibly autolaunching)\n", command_line); old_dbus_verbose = g_strdup (g_getenv ("DBUS_VERBOSE")); restore_dbus_verbose = TRUE; g_setenv ("DBUS_VERBOSE", "1", TRUE); _g_dbus_debug_print_unlock (); } if (!g_spawn_command_line_sync (command_line, &launch_stdout, &launch_stderr, &exit_status, error)) { g_prefix_error (error, _("Error spawning command line `%s': "), command_line); goto out; } if (!WIFEXITED (exit_status)) { gchar *escaped_stderr; escaped_stderr = g_strescape (launch_stderr, ""); g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, _("Abnormal program termination spawning command line `%s': %s"), command_line, escaped_stderr); g_free (escaped_stderr); goto out; } if (WEXITSTATUS (exit_status) != 0) { gchar *escaped_stderr; escaped_stderr = g_strescape (launch_stderr, ""); g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, _("Command line `%s' exited with non-zero exit status %d: %s"), command_line, WEXITSTATUS (exit_status), escaped_stderr); g_free (escaped_stderr); goto out; } /* From the dbus-launch(1) man page: * * --binary-syntax Write to stdout a nul-terminated bus address, * then the bus PID as a binary integer of size sizeof(pid_t), * then the bus X window ID as a binary integer of size * sizeof(long). Integers are in the machine's byte order, not * network byte order or any other canonical byte order. */ ret = g_strdup (launch_stdout); out: if (G_UNLIKELY (_g_dbus_debug_address ())) { gchar *s; _g_dbus_debug_print_lock (); g_print ("GDBus-debug:Address: dbus-launch output:"); if (launch_stdout != NULL) { s = _g_dbus_hexdump (launch_stdout, strlen (launch_stdout) + 1 + sizeof (pid_t) + sizeof (long), 2); g_print ("\n%s", s); g_free (s); } else { g_print (" (none)\n"); } g_print ("GDBus-debug:Address: dbus-launch stderr output:"); if (launch_stderr != NULL) g_print ("\n%s", launch_stderr); else g_print (" (none)\n"); _g_dbus_debug_print_unlock (); } g_free (machine_id); g_free (command_line); g_free (launch_stdout); g_free (launch_stderr); if (G_UNLIKELY (restore_dbus_verbose)) { if (old_dbus_verbose != NULL) g_setenv ("DBUS_VERBOSE", old_dbus_verbose, TRUE); else g_unsetenv ("DBUS_VERBOSE"); } g_free (old_dbus_verbose); return ret; } #endif /* ---------------------------------------------------------------------------------------------------- */ static gchar * get_session_address_platform_specific (GError **error) { gchar *ret; #ifdef G_OS_UNIX /* need to handle OS X in a different way since `dbus-launch --autolaunch' probably won't work there */ ret = get_session_address_dbus_launch (error); #else /* TODO: implement for UNIX, Win32 and OS X */ ret = NULL; g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED, _("Cannot determine session bus address (not implemented for this OS)")); #endif return ret; } /* ---------------------------------------------------------------------------------------------------- */ /** * g_dbus_address_get_for_bus_sync: * @bus_type: A #GBusType. * @cancellable: A #GCancellable or %NULL. * @error: Return location for error or %NULL. * * Synchronously looks up the D-Bus address for the well-known message * bus instance specified by @bus_type. This may involve using various * platform specific mechanisms. * * Returns: A valid D-Bus address string for @bus_type or %NULL if @error is set. * * Since: 2.26 */ gchar * g_dbus_address_get_for_bus_sync (GBusType bus_type, GCancellable *cancellable, GError **error) { gchar *ret; const gchar *starter_bus; GError *local_error; g_return_val_if_fail (error == NULL || *error == NULL, NULL); ret = NULL; local_error = NULL; if (G_UNLIKELY (_g_dbus_debug_address ())) { guint n; _g_dbus_debug_print_lock (); g_print ("GDBus-debug:Address: In g_dbus_address_get_for_bus_sync() for bus type `%s'\n", _g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type)); for (n = 0; n < 3; n++) { const gchar *k; const gchar *v; switch (n) { case 0: k = "DBUS_SESSION_BUS_ADDRESS"; break; case 1: k = "DBUS_SYSTEM_BUS_ADDRESS"; break; case 2: k = "DBUS_STARTER_BUS_TYPE"; break; default: g_assert_not_reached (); } v = g_getenv (k); g_print ("GDBus-debug:Address: env var %s", k); if (v != NULL) g_print ("=`%s'\n", v); else g_print (" is not set\n"); } _g_dbus_debug_print_unlock (); } switch (bus_type) { case G_BUS_TYPE_SYSTEM: ret = g_strdup (g_getenv ("DBUS_SYSTEM_BUS_ADDRESS")); if (ret == NULL) { ret = g_strdup ("unix:path=/var/run/dbus/system_bus_socket"); } break; case G_BUS_TYPE_SESSION: ret = g_strdup (g_getenv ("DBUS_SESSION_BUS_ADDRESS")); if (ret == NULL) { ret = get_session_address_platform_specific (&local_error); } break; case G_BUS_TYPE_STARTER: starter_bus = g_getenv ("DBUS_STARTER_BUS_TYPE"); if (g_strcmp0 (starter_bus, "session") == 0) { ret = g_dbus_address_get_for_bus_sync (G_BUS_TYPE_SESSION, cancellable, &local_error); goto out; } else if (g_strcmp0 (starter_bus, "system") == 0) { ret = g_dbus_address_get_for_bus_sync (G_BUS_TYPE_SYSTEM, cancellable, &local_error); goto out; } else { if (starter_bus != NULL) { g_set_error (&local_error, G_IO_ERROR, G_IO_ERROR_FAILED, _("Cannot determine bus address from DBUS_STARTER_BUS_TYPE environment variable" " - unknown value `%s'"), starter_bus); } else { g_set_error_literal (&local_error, G_IO_ERROR, G_IO_ERROR_FAILED, _("Cannot determine bus address because the DBUS_STARTER_BUS_TYPE environment " "variable is not set")); } } break; default: g_set_error (&local_error, G_IO_ERROR, G_IO_ERROR_FAILED, _("Unknown bus type %d"), bus_type); break; } out: if (G_UNLIKELY (_g_dbus_debug_address ())) { _g_dbus_debug_print_lock (); if (ret != NULL) { g_print ("GDBus-debug:Address: Returning address `%s' for bus type `%s'\n", ret, _g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type)); } else { g_print ("GDBus-debug:Address: Cannot look-up address bus type `%s': %s\n", _g_dbus_enum_to_string (G_TYPE_BUS_TYPE, bus_type), local_error ? local_error->message : ""); } _g_dbus_debug_print_unlock (); } if (local_error != NULL) g_propagate_error (error, local_error); return ret; }