1 /* GDBus - GLib D-Bus Library
3 * Copyright (C) 2008-2010 Red Hat, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
18 * Boston, MA 02111-1307, USA.
20 * Author: David Zeuthen <davidz@redhat.com>
23 /* Uncomment to debug serializer code */
24 /* #define DEBUG_SERIALIZER */
30 #include <sys/types.h>
36 #include "gdbusutils.h"
37 #include "gdbusmessage.h"
38 #include "gdbuserror.h"
39 #include "gioenumtypes.h"
40 #include "ginputstream.h"
41 #include "gdatainputstream.h"
42 #include "gmemoryinputstream.h"
43 #include "goutputstream.h"
44 #include "gdataoutputstream.h"
45 #include "gmemoryoutputstream.h"
46 #include "gseekable.h"
48 #include "gdbusprivate.h"
51 #include "gunixfdlist.h"
57 * SECTION:gdbusmessage
58 * @short_description: D-Bus Message
61 * A type for representing D-Bus messages that can be sent or received
62 * on a #GDBusConnection.
65 typedef struct _GDBusMessageClass GDBusMessageClass;
70 * Class structure for #GDBusMessage.
74 struct _GDBusMessageClass
77 GObjectClass parent_class;
83 * The #GDBusMessage structure contains only private data and should
84 * only be accessed using the provided API.
91 GObject parent_instance;
93 GDBusMessageType type;
94 GDBusMessageFlags flags;
95 guchar major_protocol_version;
100 GUnixFDList *fd_list;
104 G_DEFINE_TYPE (GDBusMessage, g_dbus_message, G_TYPE_OBJECT);
107 g_dbus_message_finalize (GObject *object)
109 GDBusMessage *message = G_DBUS_MESSAGE (object);
111 if (message->headers != NULL)
112 g_hash_table_unref (message->headers);
113 if (message->body != NULL)
114 g_variant_unref (message->body);
116 if (message->fd_list != NULL)
117 g_object_unref (message->fd_list);
120 if (G_OBJECT_CLASS (g_dbus_message_parent_class)->finalize != NULL)
121 G_OBJECT_CLASS (g_dbus_message_parent_class)->finalize (object);
125 g_dbus_message_class_init (GDBusMessageClass *klass)
127 GObjectClass *gobject_class;
129 gobject_class = G_OBJECT_CLASS (klass);
131 gobject_class->finalize = g_dbus_message_finalize;
135 g_dbus_message_init (GDBusMessage *message)
137 message->headers = g_hash_table_new_full (g_direct_hash,
140 (GDestroyNotify) g_variant_unref);
144 * g_dbus_message_new:
146 * Creates a new empty #GDBusMessage.
148 * Returns: A #GDBusMessage. Free with g_object_unref().
153 g_dbus_message_new (void)
155 return g_object_new (G_TYPE_DBUS_MESSAGE, NULL);
159 * g_dbus_message_new_method_call:
160 * @name: A valid D-Bus name or %NULL.
161 * @path: A valid object path.
162 * @interface_: A valid D-Bus interface name or %NULL.
163 * @method: A valid method name.
165 * Creates a new #GDBusMessage for a method call.
167 * Returns: A #GDBusMessage. Free with g_object_unref().
172 g_dbus_message_new_method_call (const gchar *name,
174 const gchar *interface_,
177 GDBusMessage *message;
179 g_return_val_if_fail (name == NULL || g_dbus_is_name (name), NULL);
180 g_return_val_if_fail (g_variant_is_object_path (path), NULL);
181 g_return_val_if_fail (g_dbus_is_member_name (method), NULL);
182 g_return_val_if_fail (interface_ == NULL || g_dbus_is_interface_name (interface_), NULL);
184 message = g_dbus_message_new ();
185 message->type = G_DBUS_MESSAGE_TYPE_METHOD_CALL;
188 g_dbus_message_set_destination (message, name);
189 g_dbus_message_set_path (message, path);
190 g_dbus_message_set_member (message, method);
191 if (interface_ != NULL)
192 g_dbus_message_set_interface (message, interface_);
198 * g_dbus_message_new_signal:
199 * @path: A valid object path.
200 * @interface_: A valid D-Bus interface name or %NULL.
201 * @signal: A valid signal name.
203 * Creates a new #GDBusMessage for a signal emission.
205 * Returns: A #GDBusMessage. Free with g_object_unref().
210 g_dbus_message_new_signal (const gchar *path,
211 const gchar *interface_,
214 GDBusMessage *message;
216 g_return_val_if_fail (g_variant_is_object_path (path), NULL);
217 g_return_val_if_fail (g_dbus_is_member_name (signal), NULL);
218 g_return_val_if_fail (interface_ == NULL || g_dbus_is_interface_name (interface_), NULL);
220 message = g_dbus_message_new ();
221 message->type = G_DBUS_MESSAGE_TYPE_SIGNAL;
222 message->flags = G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED;
224 g_dbus_message_set_path (message, path);
225 g_dbus_message_set_member (message, signal);
227 if (interface_ != NULL)
228 g_dbus_message_set_interface (message, interface_);
235 * g_dbus_message_new_method_reply:
236 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
237 * create a reply message to.
239 * Creates a new #GDBusMessage that is a reply to @method_call_message.
241 * Returns: A #GDBusMessage. Free with g_object_unref().
246 g_dbus_message_new_method_reply (GDBusMessage *method_call_message)
248 GDBusMessage *message;
251 g_return_val_if_fail (G_IS_DBUS_MESSAGE (method_call_message), NULL);
252 g_return_val_if_fail (g_dbus_message_get_message_type (method_call_message) == G_DBUS_MESSAGE_TYPE_METHOD_CALL, NULL);
253 g_return_val_if_fail (g_dbus_message_get_serial (method_call_message) != 0, NULL);
255 message = g_dbus_message_new ();
256 message->type = G_DBUS_MESSAGE_TYPE_METHOD_RETURN;
257 message->flags = G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED;
259 g_dbus_message_set_reply_serial (message, g_dbus_message_get_serial (method_call_message));
260 sender = g_dbus_message_get_sender (method_call_message);
262 g_dbus_message_set_destination (message, sender);
268 * g_dbus_message_new_method_error:
269 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
270 * create a reply message to.
271 * @error_name: A valid D-Bus error name.
272 * @error_message_format: The D-Bus error message in a printf() format.
273 * @...: Arguments for @error_message_format.
275 * Creates a new #GDBusMessage that is an error reply to @method_call_message.
277 * Returns: A #GDBusMessage. Free with g_object_unref().
282 g_dbus_message_new_method_error (GDBusMessage *method_call_message,
283 const gchar *error_name,
284 const gchar *error_message_format,
290 va_start (var_args, error_message_format);
291 ret = g_dbus_message_new_method_error_valist (method_call_message,
293 error_message_format,
301 * g_dbus_message_new_method_error_literal:
302 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
303 * create a reply message to.
304 * @error_name: A valid D-Bus error name.
305 * @error_message: The D-Bus error message.
307 * Creates a new #GDBusMessage that is an error reply to @method_call_message.
309 * Returns: A #GDBusMessage. Free with g_object_unref().
314 g_dbus_message_new_method_error_literal (GDBusMessage *method_call_message,
315 const gchar *error_name,
316 const gchar *error_message)
318 GDBusMessage *message;
321 g_return_val_if_fail (G_IS_DBUS_MESSAGE (method_call_message), NULL);
322 g_return_val_if_fail (g_dbus_message_get_message_type (method_call_message) == G_DBUS_MESSAGE_TYPE_METHOD_CALL, NULL);
323 g_return_val_if_fail (g_dbus_message_get_serial (method_call_message) != 0, NULL);
324 g_return_val_if_fail (g_dbus_is_name (error_name), NULL);
325 g_return_val_if_fail (error_message != NULL, NULL);
327 message = g_dbus_message_new ();
328 message->type = G_DBUS_MESSAGE_TYPE_ERROR;
329 message->flags = G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED;
331 g_dbus_message_set_reply_serial (message, g_dbus_message_get_serial (method_call_message));
332 g_dbus_message_set_error_name (message, error_name);
333 g_dbus_message_set_body (message, g_variant_new ("(s)", error_message));
335 sender = g_dbus_message_get_sender (method_call_message);
337 g_dbus_message_set_destination (message, sender);
343 * g_dbus_message_new_method_error_valist:
344 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
345 * create a reply message to.
346 * @error_name: A valid D-Bus error name.
347 * @error_message_format: The D-Bus error message in a printf() format.
348 * @var_args: Arguments for @error_message_format.
350 * Like g_dbus_message_new_method_error() but intended for language bindings.
352 * Returns: A #GDBusMessage. Free with g_object_unref().
357 g_dbus_message_new_method_error_valist (GDBusMessage *method_call_message,
358 const gchar *error_name,
359 const gchar *error_message_format,
363 gchar *error_message;
364 error_message = g_strdup_vprintf (error_message_format, var_args);
365 ret = g_dbus_message_new_method_error_literal (method_call_message,
368 g_free (error_message);
372 /* ---------------------------------------------------------------------------------------------------- */
374 /* TODO: need GI annotations to specify that any guchar value goes for the type */
377 * g_dbus_message_get_message_type:
378 * @message: A #GDBusMessage.
380 * Gets the type of @message.
382 * Returns: A 8-bit unsigned integer (typically a value from the #GDBusMessageType enumeration).
387 g_dbus_message_get_message_type (GDBusMessage *message)
389 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), G_DBUS_MESSAGE_TYPE_INVALID);
390 return message->type;
394 * g_dbus_message_set_message_type:
395 * @message: A #GDBusMessage.
396 * @type: A 8-bit unsigned integer (typically a value from the #GDBusMessageType enumeration).
398 * Sets @message to be of @type.
403 g_dbus_message_set_message_type (GDBusMessage *message,
404 GDBusMessageType type)
406 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
407 g_return_if_fail (type >=0 && type < 256);
408 message->type = type;
411 /* ---------------------------------------------------------------------------------------------------- */
413 /* TODO: need GI annotations to specify that any guchar value goes for flags */
416 * g_dbus_message_get_flags:
417 * @message: A #GDBusMessage.
419 * Gets the flags for @message.
421 * Returns: Flags that are set (typically values from the #GDBusMessageFlags enumeration bitwise ORed together).
426 g_dbus_message_get_flags (GDBusMessage *message)
428 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), G_DBUS_MESSAGE_FLAGS_NONE);
429 return message->flags;
433 * g_dbus_message_set_flags:
434 * @message: A #GDBusMessage.
435 * @flags: Flags for @message that are set (typically values from the #GDBusMessageFlags
436 * enumeration bitwise ORed together).
438 * Sets the flags to set on @message.
443 g_dbus_message_set_flags (GDBusMessage *message,
444 GDBusMessageFlags flags)
446 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
447 g_return_if_fail (flags >=0 && flags < 256);
448 message->flags = flags;
451 /* ---------------------------------------------------------------------------------------------------- */
454 * g_dbus_message_get_serial:
455 * @message: A #GDBusMessage.
457 * Gets the serial for @message.
459 * Returns: A #guint32.
464 g_dbus_message_get_serial (GDBusMessage *message)
466 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), 0);
467 return message->serial;
471 * g_dbus_message_set_serial:
472 * @message: A #GDBusMessage.
473 * @serial: A #guint32.
475 * Sets the serial for @message.
480 g_dbus_message_set_serial (GDBusMessage *message,
483 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
484 message->serial = serial;
487 /* ---------------------------------------------------------------------------------------------------- */
489 /* TODO: need GI annotations to specify that any guchar value goes for header_field */
492 * g_dbus_message_get_header:
493 * @message: A #GDBusMessage.
494 * @header_field: A 8-bit unsigned integer (typically a value from the #GDBusMessageHeaderField enumeration)
496 * Gets a header field on @message.
498 * Returns: A #GVariant with the value if the header was found, %NULL
499 * otherwise. Do not free, it is owned by @message.
504 g_dbus_message_get_header (GDBusMessage *message,
505 GDBusMessageHeaderField header_field)
507 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
508 g_return_val_if_fail (header_field >=0 && header_field < 256, NULL);
509 return g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
513 * g_dbus_message_set_header:
514 * @message: A #GDBusMessage.
515 * @header_field: A 8-bit unsigned integer (typically a value from the #GDBusMessageHeaderField enumeration)
516 * @value: A #GVariant to set the header field or %NULL to clear the header field.
518 * Sets a header field on @message.
520 * If @value is floating, @message assumes ownership of @value.
525 g_dbus_message_set_header (GDBusMessage *message,
526 GDBusMessageHeaderField header_field,
529 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
530 g_return_if_fail (header_field >=0 && header_field < 256);
533 g_hash_table_remove (message->headers, GUINT_TO_POINTER (header_field));
537 g_hash_table_insert (message->headers, GUINT_TO_POINTER (header_field), g_variant_ref_sink (value));
542 * g_dbus_message_get_header_fields:
543 * @message: A #GDBusMessage.
545 * Gets an array of all header fields on @message that are set.
547 * Returns: An array of header fields terminated by
548 * %G_DBUS_MESSAGE_HEADER_FIELD_INVALID. Each element is a
549 * #guchar. Free with g_free().
554 g_dbus_message_get_header_fields (GDBusMessage *message)
562 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
564 keys = g_hash_table_get_keys (message->headers);
565 num_keys = g_list_length (keys);
566 ret = g_new (guchar, num_keys + 1);
567 for (l = keys, n = 0; l != NULL; l = l->next, n++)
568 ret[n] = GPOINTER_TO_UINT (l->data);
569 g_assert (n == num_keys);
570 ret[n] = G_DBUS_MESSAGE_HEADER_FIELD_INVALID;
576 /* ---------------------------------------------------------------------------------------------------- */
579 * g_dbus_message_get_body:
580 * @message: A #GDBusMessage.
582 * Gets the body of a message.
584 * Returns: A #GVariant or %NULL if the body is empty. Do not free, it is owned by @message.
589 g_dbus_message_get_body (GDBusMessage *message)
591 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
592 return message->body;
596 * g_dbus_message_set_body:
597 * @message: A #GDBusMessage.
598 * @body: Either %NULL or a #GVariant that is a tuple.
600 * Sets the body @message. As a side-effect the
601 * %G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE header field is set to the
602 * type string of @body (or cleared if @body is %NULL).
604 * If @body is floating, @message assumes ownership of @body.
609 g_dbus_message_set_body (GDBusMessage *message,
612 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
613 g_return_if_fail ((body == NULL) || g_variant_is_of_type (body, G_VARIANT_TYPE_TUPLE));
615 if (message->body != NULL)
616 g_variant_unref (message->body);
619 message->body = NULL;
620 g_dbus_message_set_signature (message, NULL);
624 const gchar *type_string;
625 gsize type_string_len;
628 message->body = g_variant_ref_sink (body);
630 type_string = g_variant_get_type_string (body);
631 type_string_len = strlen (type_string);
632 g_assert (type_string_len >= 2);
633 signature = g_strndup (type_string + 1, type_string_len - 2);
634 g_dbus_message_set_signature (message, signature);
639 /* ---------------------------------------------------------------------------------------------------- */
643 * g_dbus_message_get_unix_fd_list:
644 * @message: A #GDBusMessage.
646 * Gets the UNIX file descriptors associated with @message, if any.
648 * This method is only available on UNIX.
650 * Returns: A #GUnixFDList or %NULL if no file descriptors are
651 * associated. Do not free, this object is owned by @message.
656 g_dbus_message_get_unix_fd_list (GDBusMessage *message)
658 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
659 return message->fd_list;
663 * g_dbus_message_set_unix_fd_list:
664 * @message: A #GDBusMessage.
665 * @fd_list: A #GUnixFDList or %NULL.
667 * Sets the UNIX file descriptors associated with @message. As a
668 * side-effect the %G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS header
669 * field is set to the number of fds in @fd_list (or cleared if
670 * @fd_list is %NULL).
672 * This method is only available on UNIX.
677 g_dbus_message_set_unix_fd_list (GDBusMessage *message,
678 GUnixFDList *fd_list)
680 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
681 g_return_if_fail (fd_list == NULL || G_IS_UNIX_FD_LIST (fd_list));
682 if (message->fd_list != NULL)
683 g_object_unref (message->fd_list);
686 message->fd_list = g_object_ref (fd_list);
687 g_dbus_message_set_num_unix_fds (message, g_unix_fd_list_get_length (fd_list));
691 message->fd_list = NULL;
692 g_dbus_message_set_num_unix_fds (message, 0);
697 /* ---------------------------------------------------------------------------------------------------- */
700 ensure_input_padding (GMemoryInputStream *mis,
707 offset = g_seekable_tell (G_SEEKABLE (mis));
708 wanted_offset = ((offset + padding_size - 1) / padding_size) * padding_size;
710 if (offset != wanted_offset)
712 return g_seekable_seek (G_SEEKABLE (mis), wanted_offset, G_SEEK_SET, NULL, error);
721 read_string (GMemoryInputStream *mis,
722 GDataInputStream *dis,
731 const gchar *end_valid;
733 s = g_string_new (NULL);
736 while (remaining > 0)
741 to_read = MIN (remaining, sizeof (buf));
742 num_read = g_input_stream_read (G_INPUT_STREAM (mis),
751 /* G_GSIZE_FORMAT doesn't work with gettext, so we use %lu */
754 G_IO_ERROR_INVALID_ARGUMENT,
755 _("Wanted to read %lu bytes but got EOF"),
760 remaining -= num_read;
761 g_string_append_len (s, buf, num_read);
765 nul = g_data_input_stream_read_byte (dis, NULL, &local_error);
766 if (local_error != NULL)
768 g_propagate_error (error, local_error);
771 if (!g_utf8_validate (s->str, -1, &end_valid))
775 offset = (gint) (end_valid - s->str);
776 valid_str = g_strndup (s->str, offset);
779 G_IO_ERROR_INVALID_ARGUMENT,
780 _("Expected valid UTF-8 string but found invalid bytes at byte offset %d (length of string is %d). "
781 "The valid UTF-8 string up until that that point was `%s'"),
792 G_IO_ERROR_INVALID_ARGUMENT,
793 _("Expected NUL byte after the string `%s' but found byte %d"),
798 return g_string_free (s, FALSE);
801 g_string_free (s, TRUE);
805 /* if just_align==TRUE, don't read a value, just align the input stream wrt padding */
807 /* returns a non-floating GVariant! */
809 parse_value_from_blob (GMemoryInputStream *mis,
810 GDataInputStream *dis,
811 const GVariantType *type,
820 #ifdef DEBUG_SERIALIZER
824 s = g_variant_type_dup_string (type);
825 g_print ("%*sReading type %s from offset 0x%04x",
828 (gint) g_seekable_tell (G_SEEKABLE (mis)));
831 #endif /* DEBUG_SERIALIZER */
837 if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
839 if (!ensure_input_padding (mis, 4, &local_error))
844 v = g_data_input_stream_read_uint32 (dis, NULL, &local_error);
845 if (local_error != NULL)
847 ret = g_variant_new_boolean (v);
850 else if (g_variant_type_equal (type, G_VARIANT_TYPE_BYTE))
855 v = g_data_input_stream_read_byte (dis, NULL, &local_error);
856 if (local_error != NULL)
858 ret = g_variant_new_byte (v);
861 else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT16))
863 if (!ensure_input_padding (mis, 2, &local_error))
868 v = g_data_input_stream_read_int16 (dis, NULL, &local_error);
869 if (local_error != NULL)
871 ret = g_variant_new_int16 (v);
874 else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT16))
876 if (!ensure_input_padding (mis, 2, &local_error))
881 v = g_data_input_stream_read_uint16 (dis, NULL, &local_error);
882 if (local_error != NULL)
884 ret = g_variant_new_uint16 (v);
887 else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT32))
889 if (!ensure_input_padding (mis, 4, &local_error))
894 v = g_data_input_stream_read_int32 (dis, NULL, &local_error);
895 if (local_error != NULL)
897 ret = g_variant_new_int32 (v);
900 else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT32))
902 if (!ensure_input_padding (mis, 4, &local_error))
907 v = g_data_input_stream_read_uint32 (dis, NULL, &local_error);
908 if (local_error != NULL)
910 ret = g_variant_new_uint32 (v);
913 else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT64))
915 if (!ensure_input_padding (mis, 8, &local_error))
920 v = g_data_input_stream_read_int64 (dis, NULL, &local_error);
921 if (local_error != NULL)
923 ret = g_variant_new_int64 (v);
926 else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT64))
928 if (!ensure_input_padding (mis, 8, &local_error))
933 v = g_data_input_stream_read_uint64 (dis, NULL, &local_error);
934 if (local_error != NULL)
936 ret = g_variant_new_uint64 (v);
939 else if (g_variant_type_equal (type, G_VARIANT_TYPE_DOUBLE))
941 if (!ensure_input_padding (mis, 8, &local_error))
947 v = g_data_input_stream_read_uint64 (dis, NULL, &local_error);
948 if (local_error != NULL)
950 G_STATIC_ASSERT (sizeof (gdouble) == sizeof (guint64));
951 encoded = (gdouble *) &v;
952 ret = g_variant_new_double (*encoded);
955 else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
957 if (!ensure_input_padding (mis, 4, &local_error))
963 len = g_data_input_stream_read_uint32 (dis, NULL, &local_error);
964 if (local_error != NULL)
966 v = read_string (mis, dis, (gsize) len, &local_error);
969 ret = g_variant_new_string (v);
973 else if (g_variant_type_equal (type, G_VARIANT_TYPE_OBJECT_PATH))
975 if (!ensure_input_padding (mis, 4, &local_error))
981 len = g_data_input_stream_read_uint32 (dis, NULL, &local_error);
982 if (local_error != NULL)
984 v = read_string (mis, dis, (gsize) len, &local_error);
987 if (!g_variant_is_object_path (v))
989 g_set_error (&local_error,
991 G_IO_ERROR_INVALID_ARGUMENT,
992 _("Parsed value `%s' is not a valid D-Bus object path"),
997 ret = g_variant_new_object_path (v);
1001 else if (g_variant_type_equal (type, G_VARIANT_TYPE_SIGNATURE))
1007 len = g_data_input_stream_read_byte (dis, NULL, &local_error);
1008 if (local_error != NULL)
1010 v = read_string (mis, dis, (gsize) len, &local_error);
1013 if (!g_variant_is_signature (v))
1015 g_set_error (&local_error,
1017 G_IO_ERROR_INVALID_ARGUMENT,
1018 _("Parsed value `%s' is not a valid D-Bus signature"),
1023 ret = g_variant_new_signature (v);
1027 else if (g_variant_type_equal (type, G_VARIANT_TYPE_HANDLE))
1029 if (!ensure_input_padding (mis, 4, &local_error))
1034 v = g_data_input_stream_read_int32 (dis, NULL, &local_error);
1035 if (local_error != NULL)
1037 ret = g_variant_new_handle (v);
1040 else if (g_variant_type_is_array (type))
1045 const GVariantType *element_type;
1046 GVariantBuilder builder;
1048 if (!ensure_input_padding (mis, 4, &local_error))
1057 array_len = g_data_input_stream_read_uint32 (dis, NULL, &local_error);
1058 if (local_error != NULL)
1062 #ifdef DEBUG_SERIALIZER
1063 g_print (": array spans 0x%04x bytes\n", array_len);
1064 #endif /* DEBUG_SERIALIZER */
1066 if (array_len > (2<<26))
1068 /* G_GUINT32_FORMAT doesn't work with gettext, so use u */
1069 g_set_error (&local_error,
1071 G_IO_ERROR_INVALID_ARGUMENT,
1072 _("Encountered array of length %u bytes. Maximum length is 2<<26 bytes (64 MiB)."),
1078 g_variant_builder_init (&builder, type);
1079 element_type = g_variant_type_element (type);
1084 item = parse_value_from_blob (mis,
1090 g_assert (item == NULL);
1094 /* TODO: optimize array of primitive types */
1095 offset = g_seekable_tell (G_SEEKABLE (mis));
1096 target = offset + array_len;
1097 while (offset < target)
1100 item = parse_value_from_blob (mis,
1108 g_variant_builder_clear (&builder);
1111 g_variant_builder_add_value (&builder, item);
1112 g_variant_unref (item);
1113 offset = g_seekable_tell (G_SEEKABLE (mis));
1119 ret = g_variant_builder_end (&builder);
1123 g_variant_builder_clear (&builder);
1126 else if (g_variant_type_is_dict_entry (type))
1128 const GVariantType *key_type;
1129 const GVariantType *value_type;
1133 if (!ensure_input_padding (mis, 8, &local_error))
1137 #ifdef DEBUG_SERIALIZER
1139 #endif /* DEBUG_SERIALIZER */
1143 key_type = g_variant_type_key (type);
1144 key = parse_value_from_blob (mis,
1152 value_type = g_variant_type_value (type);
1153 value = parse_value_from_blob (mis,
1161 g_variant_unref (key);
1164 ret = g_variant_new_dict_entry (key, value);
1165 g_variant_unref (key);
1166 g_variant_unref (value);
1169 else if (g_variant_type_is_tuple (type))
1171 if (!ensure_input_padding (mis, 8, &local_error))
1175 #ifdef DEBUG_SERIALIZER
1177 #endif /* DEBUG_SERIALIZER */
1181 const GVariantType *element_type;
1182 GVariantBuilder builder;
1184 g_variant_builder_init (&builder, type);
1185 element_type = g_variant_type_first (type);
1186 while (element_type != NULL)
1189 item = parse_value_from_blob (mis,
1197 g_variant_builder_clear (&builder);
1200 g_variant_builder_add_value (&builder, item);
1201 g_variant_unref (item);
1203 element_type = g_variant_type_next (element_type);
1205 ret = g_variant_builder_end (&builder);
1208 else if (g_variant_type_is_variant (type))
1211 #ifdef DEBUG_SERIALIZER
1213 #endif /* DEBUG_SERIALIZER */
1219 GVariantType *variant_type;
1222 siglen = g_data_input_stream_read_byte (dis, NULL, &local_error);
1223 if (local_error != NULL)
1225 sig = read_string (mis, dis, (gsize) siglen, &local_error);
1228 if (!g_variant_is_signature (sig))
1230 g_set_error (&local_error,
1232 G_IO_ERROR_INVALID_ARGUMENT,
1233 _("Parsed value `%s' for variant is not a valid D-Bus signature"),
1238 variant_type = g_variant_type_new (sig);
1240 value = parse_value_from_blob (mis,
1246 g_variant_type_free (variant_type);
1249 ret = g_variant_new_variant (value);
1250 g_variant_unref (value);
1256 s = g_variant_type_dup_string (type);
1257 g_set_error (&local_error,
1259 G_IO_ERROR_INVALID_ARGUMENT,
1260 _("Error deserializing GVariant with type-string `%s' from the D-Bus wire format"),
1266 g_assert ((just_align && ret == NULL) || (!just_align && ret != NULL));
1268 #ifdef DEBUG_SERIALIZER
1274 if (g_variant_type_equal (type, G_VARIANT_TYPE_BYTE))
1276 s = g_strdup_printf ("0x%02x '%c'", g_variant_get_byte (ret), g_variant_get_byte (ret));
1280 s = g_variant_print (ret, FALSE);
1282 g_print (": %s\n", s);
1286 #endif /* DEBUG_SERIALIZER */
1288 /* sink the reference */
1291 g_assert (g_variant_is_floating (ret));
1292 g_variant_ref_sink (ret);
1297 #ifdef DEBUG_SERIALIZER
1299 "%*sFAILURE: %s (%s, %d)\n",
1301 local_error->message,
1302 g_quark_to_string (local_error->domain),
1304 #endif /* DEBUG_SERIALIZER */
1305 g_propagate_error (error, local_error);
1309 /* ---------------------------------------------------------------------------------------------------- */
1311 /* message_header must be at least 16 bytes */
1314 * g_dbus_message_bytes_needed:
1315 * @blob: A blob represent a binary D-Bus message.
1316 * @blob_len: The length of @blob (must be at least 16).
1317 * @error: Return location for error or %NULL.
1319 * Utility function to calculate how many bytes are needed to
1320 * completely deserialize the D-Bus message stored at @blob.
1322 * Returns: Number of bytes needed or -1 if @error is set (e.g. if
1323 * @blob contains invalid data or not enough data is available to
1324 * determine the size).
1329 g_dbus_message_bytes_needed (guchar *blob,
1337 g_return_val_if_fail (blob != NULL, -1);
1338 g_return_val_if_fail (error == NULL || *error == NULL, -1);
1339 g_return_val_if_fail (blob_len >= 16, -1);
1343 /* core header (12 bytes) + ARRAY of STRUCT of (BYTE,VARIANT) */
1344 ret = 12 + 4 + GUINT32_FROM_LE (((guint32 *) blob)[3]);
1345 /* round up so it's a multiple of 8 */
1346 ret = 8 * ((ret + 7)/8);
1347 /* finally add the body size */
1348 ret += GUINT32_FROM_LE (((guint32 *) blob)[1]);
1350 else if (blob[0] == 'B')
1352 /* core header (12 bytes) + ARRAY of STRUCT of (BYTE,VARIANT) */
1353 ret = 12 + 4 + GUINT32_FROM_BE (((guint32 *) blob)[3]);
1354 /* round up so it's a multiple of 8 */
1355 ret = 8 * ((ret + 7)/8);
1356 /* finally add the body size */
1357 ret += GUINT32_FROM_BE (((guint32 *) blob)[1]);
1363 G_IO_ERROR_INVALID_ARGUMENT,
1364 "Unable to determine message blob length - given blob is malformed");
1371 G_IO_ERROR_INVALID_ARGUMENT,
1372 "Blob indicates that message exceeds maximum message length (128MiB)");
1379 /* ---------------------------------------------------------------------------------------------------- */
1382 * g_dbus_message_new_from_blob:
1383 * @blob: A blob represent a binary D-Bus message.
1384 * @blob_len: The length of @blob.
1385 * @capabilities: A #GDBusCapabilityFlags describing what protocol features are supported.
1386 * @error: Return location for error or %NULL.
1388 * Creates a new #GDBusMessage from the data stored at @blob.
1390 * Returns: A new #GDBusMessage or %NULL if @error is set. Free with
1396 g_dbus_message_new_from_blob (guchar *blob,
1398 GDBusCapabilityFlags capabilities,
1402 GMemoryInputStream *mis;
1403 GDataInputStream *dis;
1404 GDBusMessage *message;
1406 guchar major_protocol_version;
1407 GDataStreamByteOrder byte_order;
1408 guint32 message_body_len;
1412 GVariant *signature;
1414 /* TODO: check against @capabilities */
1418 g_return_val_if_fail (blob != NULL, NULL);
1419 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
1420 g_return_val_if_fail (blob_len >= 12, NULL);
1422 message = g_dbus_message_new ();
1424 mis = G_MEMORY_INPUT_STREAM (g_memory_input_stream_new_from_data (blob, blob_len, NULL));
1425 dis = g_data_input_stream_new (G_INPUT_STREAM (mis));
1427 endianness = g_data_input_stream_read_byte (dis, NULL, NULL);
1431 byte_order = G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN;
1434 byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
1439 G_IO_ERROR_INVALID_ARGUMENT,
1440 _("Invalid endianness value. Expected 'l' or 'B' but found '%c' (%d)"),
1441 endianness, endianness);
1444 g_data_input_stream_set_byte_order (dis, byte_order);
1446 message->type = g_data_input_stream_read_byte (dis, NULL, NULL);
1447 message->flags = g_data_input_stream_read_byte (dis, NULL, NULL);
1448 major_protocol_version = g_data_input_stream_read_byte (dis, NULL, NULL);
1449 if (major_protocol_version != 1)
1453 G_IO_ERROR_INVALID_ARGUMENT,
1454 _("Invalid major protocol version. Expected 1 but found %d"),
1455 major_protocol_version);
1458 message_body_len = g_data_input_stream_read_uint32 (dis, NULL, NULL);
1459 message->serial = g_data_input_stream_read_uint32 (dis, NULL, NULL);
1461 #ifdef DEBUG_SERIALIZER
1462 g_print ("Parsing blob (blob_len = 0x%04x bytes)\n", (gint) blob_len);
1465 s = _g_dbus_hexdump ((const gchar *) blob, blob_len, 2);
1466 g_print ("%s\n", s);
1469 #endif /* DEBUG_SERIALIZER */
1471 #ifdef DEBUG_SERIALIZER
1472 g_print ("Parsing headers (blob_len = 0x%04x bytes)\n", (gint) blob_len);
1473 #endif /* DEBUG_SERIALIZER */
1474 headers = parse_value_from_blob (mis,
1476 G_VARIANT_TYPE ("a{yv}"),
1480 if (headers == NULL)
1482 g_variant_iter_init (&iter, headers);
1483 while ((item = g_variant_iter_next_value (&iter)) != NULL)
1485 guchar header_field;
1487 g_variant_get (item,
1491 g_dbus_message_set_header (message, header_field, value);
1492 g_variant_unref (value);
1493 g_variant_unref (item);
1495 g_variant_unref (headers);
1497 signature = g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE);
1498 if (signature != NULL)
1500 const gchar *signature_str;
1501 gsize signature_str_len;
1503 signature_str = g_variant_get_string (signature, &signature_str_len);
1505 /* signature but no body */
1506 if (message_body_len == 0 && signature_str_len > 0)
1510 G_IO_ERROR_INVALID_ARGUMENT,
1511 _("Signature header with signature `%s' found but message body is empty"),
1515 else if (signature_str_len > 0)
1517 GVariantType *variant_type;
1518 gchar *tupled_signature_str;
1520 if (!g_variant_is_signature (signature_str))
1524 G_IO_ERROR_INVALID_ARGUMENT,
1525 _("Parsed value `%s' is not a valid D-Bus signature (for body)"),
1529 tupled_signature_str = g_strdup_printf ("(%s)", signature_str);
1530 variant_type = g_variant_type_new (tupled_signature_str);
1531 g_free (tupled_signature_str);
1532 #ifdef DEBUG_SERIALIZER
1533 g_print ("Parsing body (blob_len = 0x%04x bytes)\n", (gint) blob_len);
1534 #endif /* DEBUG_SERIALIZER */
1535 message->body = parse_value_from_blob (mis,
1541 g_variant_type_free (variant_type);
1542 if (message->body == NULL)
1548 /* no signature, this is only OK if the body is empty */
1549 if (message_body_len != 0)
1551 /* G_GUINT32_FORMAT doesn't work with gettext, just use %u */
1554 G_IO_ERROR_INVALID_ARGUMENT,
1555 _("No signature header in message but the message body is %u bytes"),
1565 g_object_unref (dis);
1566 g_object_unref (mis);
1574 if (message != NULL)
1575 g_object_unref (message);
1580 /* ---------------------------------------------------------------------------------------------------- */
1583 ensure_output_padding (GMemoryOutputStream *mos,
1584 GDataOutputStream *dos,
1588 gsize wanted_offset;
1589 gsize padding_needed;
1592 offset = g_memory_output_stream_get_data_size (mos);
1593 wanted_offset = ((offset + padding_size - 1) / padding_size) * padding_size;
1594 padding_needed = wanted_offset - offset;
1596 for (n = 0; n < padding_needed; n++)
1597 g_data_output_stream_put_byte (dos, '\0', NULL, NULL);
1599 return padding_needed;
1602 /* note that value can be NULL for e.g. empty arrays - type is never NULL */
1604 append_value_to_blob (GVariant *value,
1605 const GVariantType *type,
1606 GMemoryOutputStream *mos,
1607 GDataOutputStream *dos,
1608 gsize *out_padding_added,
1611 gsize padding_added;
1615 if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
1617 padding_added = ensure_output_padding (mos, dos, 4);
1620 gboolean v = g_variant_get_boolean (value);
1621 g_data_output_stream_put_uint32 (dos, v, NULL, NULL);
1624 else if (g_variant_type_equal (type, G_VARIANT_TYPE_BYTE))
1628 guint8 v = g_variant_get_byte (value);
1629 g_data_output_stream_put_byte (dos, v, NULL, NULL);
1632 else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT16))
1634 padding_added = ensure_output_padding (mos, dos, 2);
1637 gint16 v = g_variant_get_int16 (value);
1638 g_data_output_stream_put_int16 (dos, v, NULL, NULL);
1641 else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT16))
1643 padding_added = ensure_output_padding (mos, dos, 2);
1646 guint16 v = g_variant_get_uint16 (value);
1647 g_data_output_stream_put_uint16 (dos, v, NULL, NULL);
1650 else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT32))
1652 padding_added = ensure_output_padding (mos, dos, 4);
1655 gint32 v = g_variant_get_int32 (value);
1656 g_data_output_stream_put_int32 (dos, v, NULL, NULL);
1659 else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT32))
1661 padding_added = ensure_output_padding (mos, dos, 4);
1664 guint32 v = g_variant_get_uint32 (value);
1665 g_data_output_stream_put_uint32 (dos, v, NULL, NULL);
1668 else if (g_variant_type_equal (type, G_VARIANT_TYPE_INT64))
1670 padding_added = ensure_output_padding (mos, dos, 8);
1673 gint64 v = g_variant_get_int64 (value);
1674 g_data_output_stream_put_int64 (dos, v, NULL, NULL);
1677 else if (g_variant_type_equal (type, G_VARIANT_TYPE_UINT64))
1679 padding_added = ensure_output_padding (mos, dos, 8);
1682 guint64 v = g_variant_get_uint64 (value);
1683 g_data_output_stream_put_uint64 (dos, v, NULL, NULL);
1686 else if (g_variant_type_equal (type, G_VARIANT_TYPE_DOUBLE))
1688 padding_added = ensure_output_padding (mos, dos, 8);
1692 gdouble v = g_variant_get_double (value);
1693 G_STATIC_ASSERT (sizeof (gdouble) == sizeof (guint64));
1694 encoded = (guint64 *) &v;
1695 g_data_output_stream_put_uint64 (dos, *encoded, NULL, NULL);
1698 else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
1700 padding_added = ensure_output_padding (mos, dos, 4);
1706 v = g_variant_get_string (value, &len);
1707 g_assert (g_utf8_validate (v, -1, &end) && (end == v + len));
1708 g_data_output_stream_put_uint32 (dos, len, NULL, NULL);
1709 g_data_output_stream_put_string (dos, v, NULL, NULL);
1710 g_data_output_stream_put_byte (dos, '\0', NULL, NULL);
1713 else if (g_variant_type_equal (type, G_VARIANT_TYPE_OBJECT_PATH))
1715 padding_added = ensure_output_padding (mos, dos, 4);
1719 const gchar *v = g_variant_get_string (value, &len);
1720 g_assert (g_variant_is_object_path (v));
1721 g_data_output_stream_put_uint32 (dos, len, NULL, NULL);
1722 g_data_output_stream_put_string (dos, v, NULL, NULL);
1723 g_data_output_stream_put_byte (dos, '\0', NULL, NULL);
1726 else if (g_variant_type_equal (type, G_VARIANT_TYPE_SIGNATURE))
1731 const gchar *v = g_variant_get_string (value, &len);
1732 g_assert (g_variant_is_signature (v));
1733 g_data_output_stream_put_byte (dos, len, NULL, NULL);
1734 g_data_output_stream_put_string (dos, v, NULL, NULL);
1735 g_data_output_stream_put_byte (dos, '\0', NULL, NULL);
1738 else if (g_variant_type_equal (type, G_VARIANT_TYPE_HANDLE))
1740 padding_added = ensure_output_padding (mos, dos, 4);
1743 gint32 v = g_variant_get_handle (value);
1744 g_data_output_stream_put_int32 (dos, v, NULL, NULL);
1747 else if (g_variant_type_is_array (type))
1751 goffset array_len_offset;
1752 goffset array_payload_begin_offset;
1756 padding_added = ensure_output_padding (mos, dos, 4);
1759 /* array length - will be filled in later */
1760 array_len_offset = g_memory_output_stream_get_data_size (mos);
1761 g_data_output_stream_put_uint32 (dos, 0xF00DFACE, NULL, NULL);
1763 /* From the D-Bus spec:
1765 * "A UINT32 giving the length of the array data in bytes,
1766 * followed by alignment padding to the alignment boundary of
1767 * the array element type, followed by each array element. The
1768 * array length is from the end of the alignment padding to
1769 * the end of the last element, i.e. it does not include the
1770 * padding after the length, or any padding after the last
1773 * Thus, we need to count how much padding the first element
1774 * contributes and subtract that from the array length.
1776 array_payload_begin_offset = g_memory_output_stream_get_data_size (mos);
1778 if (g_variant_n_children (value) == 0)
1780 gsize padding_added_for_item;
1781 if (!append_value_to_blob (NULL,
1782 g_variant_type_element (type),
1785 &padding_added_for_item,
1788 array_payload_begin_offset += padding_added_for_item;
1794 g_variant_iter_init (&iter, value);
1795 while ((item = g_variant_iter_next_value (&iter)) != NULL)
1797 gsize padding_added_for_item;
1798 if (!append_value_to_blob (item,
1799 g_variant_get_type (item),
1802 &padding_added_for_item,
1805 g_variant_unref (item);
1808 g_variant_unref (item);
1811 array_payload_begin_offset += padding_added_for_item;
1817 cur_offset = g_memory_output_stream_get_data_size (mos);
1819 array_len = cur_offset - array_payload_begin_offset;
1821 if (!g_seekable_seek (G_SEEKABLE (mos), array_len_offset, G_SEEK_SET, NULL, error))
1824 g_data_output_stream_put_uint32 (dos, array_len, NULL, NULL);
1826 if (!g_seekable_seek (G_SEEKABLE (mos), cur_offset, G_SEEK_SET, NULL, error))
1830 else if (g_variant_type_is_dict_entry (type) || g_variant_type_is_tuple (type))
1832 padding_added = ensure_output_padding (mos, dos, 8);
1837 g_variant_iter_init (&iter, value);
1838 while ((item = g_variant_iter_next_value (&iter)) != NULL)
1840 if (!append_value_to_blob (item,
1841 g_variant_get_type (item),
1847 g_variant_unref (item);
1850 g_variant_unref (item);
1854 else if (g_variant_type_is_variant (type))
1859 const gchar *signature;
1860 child = g_variant_get_child_value (value, 0);
1861 signature = g_variant_get_type_string (child);
1862 g_data_output_stream_put_byte (dos, strlen (signature), NULL, NULL);
1863 g_data_output_stream_put_string (dos, signature, NULL, NULL);
1864 g_data_output_stream_put_byte (dos, '\0', NULL, NULL);
1865 if (!append_value_to_blob (child,
1866 g_variant_get_type (child),
1872 g_variant_unref (child);
1875 g_variant_unref (child);
1882 G_IO_ERROR_INVALID_ARGUMENT,
1883 _("Error serializing GVariant with type-string `%s' to the D-Bus wire format"),
1884 g_variant_get_type_string (value));
1888 if (out_padding_added != NULL)
1889 *out_padding_added = padding_added;
1898 append_body_to_blob (GVariant *value,
1899 GMemoryOutputStream *mos,
1900 GDataOutputStream *dos,
1909 if (!g_variant_is_of_type (value, G_VARIANT_TYPE_TUPLE))
1913 G_IO_ERROR_INVALID_ARGUMENT,
1914 "Expected a tuple for the body of the GDBusMessage.");
1918 g_variant_iter_init (&iter, value);
1919 while ((item = g_variant_iter_next_value (&iter)) != NULL)
1921 if (!append_value_to_blob (item,
1922 g_variant_get_type (item),
1928 g_variant_unref (item);
1931 g_variant_unref (item);
1939 /* ---------------------------------------------------------------------------------------------------- */
1942 * g_dbus_message_to_blob:
1943 * @message: A #GDBusMessage.
1944 * @out_size: Return location for size of generated blob.
1945 * @capabilities: A #GDBusCapabilityFlags describing what protocol features are supported.
1946 * @error: Return location for error.
1948 * Serializes @message to a blob.
1950 * Returns: A pointer to a valid binary D-Bus message of @out_size bytes
1951 * generated by @message or %NULL if @error is set. Free with g_free().
1956 g_dbus_message_to_blob (GDBusMessage *message,
1958 GDBusCapabilityFlags capabilities,
1961 GMemoryOutputStream *mos;
1962 GDataOutputStream *dos;
1965 GDataStreamByteOrder byte_order;
1966 goffset body_len_offset;
1967 goffset body_start_offset;
1969 GVariant *header_fields;
1970 GVariantBuilder builder;
1971 GHashTableIter hash_iter;
1973 GVariant *header_value;
1974 GVariant *signature;
1975 const gchar *signature_str;
1976 gint num_fds_in_message;
1977 gint num_fds_according_to_header;
1979 /* TODO: check against @capabilities */
1983 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
1984 g_return_val_if_fail (out_size != NULL, NULL);
1985 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
1987 mos = G_MEMORY_OUTPUT_STREAM (g_memory_output_stream_new (NULL, 0, g_realloc, g_free));
1988 dos = g_data_output_stream_new (G_OUTPUT_STREAM (mos));
1990 /* Any D-Bus implementation is supposed to handle both Big and
1991 * Little Endian encodings and the Endianness is part of the D-Bus
1992 * message - we prefer to use Big Endian (since it's Network Byte
1993 * Order and just easier to read for humans) but if the machine is
1994 * Little Endian we use that for performance reasons.
1996 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
1997 byte_order = G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN;
1999 /* this could also be G_PDP_ENDIAN */
2000 byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
2002 g_data_output_stream_set_byte_order (dos, byte_order);
2005 g_data_output_stream_put_byte (dos, byte_order == G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN ? 'l' : 'B', NULL, NULL);
2006 g_data_output_stream_put_byte (dos, message->type, NULL, NULL);
2007 g_data_output_stream_put_byte (dos, message->flags, NULL, NULL);
2008 g_data_output_stream_put_byte (dos, 1, NULL, NULL); /* major protocol version */
2009 body_len_offset = g_memory_output_stream_get_data_size (mos);
2010 /* body length - will be filled in later */
2011 g_data_output_stream_put_uint32 (dos, 0xF00DFACE, NULL, NULL);
2012 g_data_output_stream_put_uint32 (dos, message->serial, NULL, NULL);
2014 num_fds_in_message = 0;
2016 if (message->fd_list != NULL)
2017 num_fds_in_message = g_unix_fd_list_get_length (message->fd_list);
2019 num_fds_according_to_header = g_dbus_message_get_num_unix_fds (message);
2020 /* TODO: check we have all the right header fields and that they are the correct value etc etc */
2021 if (num_fds_in_message != num_fds_according_to_header)
2025 G_IO_ERROR_INVALID_ARGUMENT,
2026 _("Message has %d fds but the header field indicates %d fds"),
2028 num_fds_according_to_header);
2032 g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{yv}"));
2033 g_hash_table_iter_init (&hash_iter, message->headers);
2034 while (g_hash_table_iter_next (&hash_iter, &key, (gpointer) &header_value))
2036 g_variant_builder_add (&builder,
2038 (guchar) GPOINTER_TO_UINT (key),
2041 header_fields = g_variant_builder_end (&builder);
2043 if (!append_value_to_blob (header_fields,
2044 g_variant_get_type (header_fields),
2049 g_variant_unref (header_fields);
2052 g_variant_unref (header_fields);
2054 /* header size must be a multiple of 8 */
2055 ensure_output_padding (mos, dos, 8);
2057 body_start_offset = g_memory_output_stream_get_data_size (mos);
2059 signature = g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE);
2060 signature_str = NULL;
2061 if (signature != NULL)
2062 signature_str = g_variant_get_string (signature, NULL);
2063 if (message->body != NULL)
2065 gchar *tupled_signature_str;
2066 tupled_signature_str = g_strdup_printf ("(%s)", signature_str);
2067 if (signature == NULL)
2071 G_IO_ERROR_INVALID_ARGUMENT,
2072 _("Message body has signature `%s' but there is no signature header"),
2074 g_free (tupled_signature_str);
2077 else if (g_strcmp0 (tupled_signature_str, g_variant_get_type_string (message->body)) != 0)
2081 G_IO_ERROR_INVALID_ARGUMENT,
2082 _("Message body has type signature `%s' but signature in the header field is `%s'"),
2083 tupled_signature_str, g_variant_get_type_string (message->body));
2084 g_free (tupled_signature_str);
2087 g_free (tupled_signature_str);
2088 if (!append_body_to_blob (message->body, mos, dos, error))
2093 if (signature != NULL && strlen (signature_str) > 0)
2097 G_IO_ERROR_INVALID_ARGUMENT,
2098 _("Message body is empty but signature in the header field is `(%s)'"),
2104 /* OK, we're done writing the message - set the body length */
2105 size = g_memory_output_stream_get_data_size (mos);
2106 body_size = size - body_start_offset;
2108 if (!g_seekable_seek (G_SEEKABLE (mos), body_len_offset, G_SEEK_SET, NULL, error))
2111 g_data_output_stream_put_uint32 (dos, body_size, NULL, NULL);
2114 ret = g_memdup (g_memory_output_stream_get_data (mos), size);
2117 g_object_unref (dos);
2118 g_object_unref (mos);
2123 /* ---------------------------------------------------------------------------------------------------- */
2126 get_uint32_header (GDBusMessage *message,
2127 GDBusMessageHeaderField header_field)
2133 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2134 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_UINT32))
2135 ret = g_variant_get_uint32 (value);
2140 static const gchar *
2141 get_string_header (GDBusMessage *message,
2142 GDBusMessageHeaderField header_field)
2148 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2149 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_STRING))
2150 ret = g_variant_get_string (value, NULL);
2155 static const gchar *
2156 get_object_path_header (GDBusMessage *message,
2157 GDBusMessageHeaderField header_field)
2163 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2164 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_OBJECT_PATH))
2165 ret = g_variant_get_string (value, NULL);
2170 static const gchar *
2171 get_signature_header (GDBusMessage *message,
2172 GDBusMessageHeaderField header_field)
2178 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2179 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_SIGNATURE))
2180 ret = g_variant_get_string (value, NULL);
2185 /* ---------------------------------------------------------------------------------------------------- */
2188 set_uint32_header (GDBusMessage *message,
2189 GDBusMessageHeaderField header_field,
2192 g_dbus_message_set_header (message,
2194 g_variant_new_uint32 (value));
2198 set_string_header (GDBusMessage *message,
2199 GDBusMessageHeaderField header_field,
2202 g_dbus_message_set_header (message,
2204 value == NULL ? NULL : g_variant_new_string (value));
2208 set_object_path_header (GDBusMessage *message,
2209 GDBusMessageHeaderField header_field,
2212 g_dbus_message_set_header (message,
2214 value == NULL ? NULL : g_variant_new_object_path (value));
2218 set_signature_header (GDBusMessage *message,
2219 GDBusMessageHeaderField header_field,
2222 g_dbus_message_set_header (message,
2224 value == NULL ? NULL : g_variant_new_signature (value));
2227 /* ---------------------------------------------------------------------------------------------------- */
2230 * g_dbus_message_get_reply_serial:
2231 * @message: A #GDBusMessage.
2233 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL header field.
2235 * Returns: The value.
2240 g_dbus_message_get_reply_serial (GDBusMessage *message)
2242 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), 0);
2243 return get_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL);
2247 * g_dbus_message_set_reply_serial:
2248 * @message: A #GDBusMessage.
2249 * @value: The value to set.
2251 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL header field.
2256 g_dbus_message_set_reply_serial (GDBusMessage *message,
2259 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2260 set_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL, value);
2263 /* ---------------------------------------------------------------------------------------------------- */
2266 * g_dbus_message_get_interface:
2267 * @message: A #GDBusMessage.
2269 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE header field.
2271 * Returns: The value.
2276 g_dbus_message_get_interface (GDBusMessage *message)
2278 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2279 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE);
2283 * g_dbus_message_set_interface:
2284 * @message: A #GDBusMessage.
2285 * @value: The value to set.
2287 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE header field.
2292 g_dbus_message_set_interface (GDBusMessage *message,
2295 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2296 g_return_if_fail (value == NULL || g_dbus_is_interface_name (value));
2297 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE, value);
2300 /* ---------------------------------------------------------------------------------------------------- */
2303 * g_dbus_message_get_member:
2304 * @message: A #GDBusMessage.
2306 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_MEMBER header field.
2308 * Returns: The value.
2313 g_dbus_message_get_member (GDBusMessage *message)
2315 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2316 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_MEMBER);
2320 * g_dbus_message_set_member:
2321 * @message: A #GDBusMessage.
2322 * @value: The value to set.
2324 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_MEMBER header field.
2329 g_dbus_message_set_member (GDBusMessage *message,
2332 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2333 g_return_if_fail (value == NULL || g_dbus_is_member_name (value));
2334 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_MEMBER, value);
2337 /* ---------------------------------------------------------------------------------------------------- */
2340 * g_dbus_message_get_path:
2341 * @message: A #GDBusMessage.
2343 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_PATH header field.
2345 * Returns: The value.
2350 g_dbus_message_get_path (GDBusMessage *message)
2352 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2353 return get_object_path_header (message, G_DBUS_MESSAGE_HEADER_FIELD_PATH);
2357 * g_dbus_message_set_path:
2358 * @message: A #GDBusMessage.
2359 * @value: The value to set.
2361 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_PATH header field.
2366 g_dbus_message_set_path (GDBusMessage *message,
2369 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2370 g_return_if_fail (value == NULL || g_variant_is_object_path (value));
2371 set_object_path_header (message, G_DBUS_MESSAGE_HEADER_FIELD_PATH, value);
2374 /* ---------------------------------------------------------------------------------------------------- */
2377 * g_dbus_message_get_sender:
2378 * @message: A #GDBusMessage.
2380 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_SENDER header field.
2382 * Returns: The value.
2387 g_dbus_message_get_sender (GDBusMessage *message)
2389 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2390 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SENDER);
2394 * g_dbus_message_set_sender:
2395 * @message: A #GDBusMessage.
2396 * @value: The value to set.
2398 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_SENDER header field.
2403 g_dbus_message_set_sender (GDBusMessage *message,
2406 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2407 g_return_if_fail (value == NULL || g_dbus_is_name (value));
2408 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SENDER, value);
2411 /* ---------------------------------------------------------------------------------------------------- */
2414 * g_dbus_message_get_destination:
2415 * @message: A #GDBusMessage.
2417 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION header field.
2419 * Returns: The value.
2424 g_dbus_message_get_destination (GDBusMessage *message)
2426 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2427 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION);
2431 * g_dbus_message_set_destination:
2432 * @message: A #GDBusMessage.
2433 * @value: The value to set.
2435 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION header field.
2440 g_dbus_message_set_destination (GDBusMessage *message,
2443 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2444 g_return_if_fail (value == NULL || g_dbus_is_name (value));
2445 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION, value);
2448 /* ---------------------------------------------------------------------------------------------------- */
2451 * g_dbus_message_get_error_name:
2452 * @message: A #GDBusMessage.
2454 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME header field.
2456 * Returns: The value.
2461 g_dbus_message_get_error_name (GDBusMessage *message)
2463 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2464 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME);
2468 * g_dbus_message_set_error_name:
2469 * @message: A #GDBusMessage.
2470 * @value: The value to set.
2472 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME header field.
2477 g_dbus_message_set_error_name (GDBusMessage *message,
2480 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2481 g_return_if_fail (value == NULL || g_dbus_is_interface_name (value));
2482 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME, value);
2485 /* ---------------------------------------------------------------------------------------------------- */
2488 * g_dbus_message_get_signature:
2489 * @message: A #GDBusMessage.
2491 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE header field.
2493 * Returns: The value.
2498 g_dbus_message_get_signature (GDBusMessage *message)
2501 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2502 ret = get_signature_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE);
2509 * g_dbus_message_set_signature:
2510 * @message: A #GDBusMessage.
2511 * @value: The value to set.
2513 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE header field.
2518 g_dbus_message_set_signature (GDBusMessage *message,
2521 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2522 g_return_if_fail (value == NULL || g_variant_is_signature (value));
2523 set_signature_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE, value);
2526 /* ---------------------------------------------------------------------------------------------------- */
2529 * g_dbus_message_get_arg0:
2530 * @message: A #GDBusMessage.
2532 * Convenience to get the first item in the body of @message.
2534 * Returns: The string item or %NULL if the first item in the body of
2535 * @message is not a string.
2540 g_dbus_message_get_arg0 (GDBusMessage *message)
2544 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2548 if (message->body != NULL && g_variant_is_of_type (message->body, G_VARIANT_TYPE_TUPLE))
2551 item = g_variant_get_child_value (message->body, 0);
2552 if (g_variant_is_of_type (item, G_VARIANT_TYPE_STRING))
2553 ret = g_variant_get_string (item, NULL);
2554 g_variant_unref (item);
2560 /* ---------------------------------------------------------------------------------------------------- */
2563 * g_dbus_message_get_num_unix_fds:
2564 * @message: A #GDBusMessage.
2566 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS header field.
2568 * Returns: The value.
2573 g_dbus_message_get_num_unix_fds (GDBusMessage *message)
2575 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), 0);
2576 return get_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS);
2580 * g_dbus_message_set_num_unix_fds:
2581 * @message: A #GDBusMessage.
2582 * @value: The value to set.
2584 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS header field.
2589 g_dbus_message_set_num_unix_fds (GDBusMessage *message,
2592 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2593 set_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS, value);
2596 /* ---------------------------------------------------------------------------------------------------- */
2599 * g_dbus_message_to_gerror:
2600 * @message: A #GDBusMessage.
2601 * @error: The #GError to set.
2603 * If @message is not of type %G_DBUS_MESSAGE_TYPE_ERROR does
2604 * nothing and returns %FALSE.
2606 * Otherwise this method encodes the error in @message as a #GError
2607 * using g_dbus_error_set_dbus_error() using the information in the
2608 * %G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME header field of @message as
2609 * well as the first string item in @message's body.
2611 * Returns: %TRUE if @error was set, %FALSE otherwise.
2616 g_dbus_message_to_gerror (GDBusMessage *message,
2620 const gchar *error_name;
2622 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
2625 if (message->type != G_DBUS_MESSAGE_TYPE_ERROR)
2628 error_name = g_dbus_message_get_error_name (message);
2629 if (error_name != NULL)
2633 body = g_dbus_message_get_body (message);
2635 if (body != NULL && g_variant_is_of_type (body, G_VARIANT_TYPE ("(s)")))
2637 const gchar *error_message;
2638 g_variant_get (body, "(&s)", &error_message);
2639 g_dbus_error_set_dbus_error (error,
2646 /* these two situations are valid, yet pretty rare */
2649 g_dbus_error_set_dbus_error (error,
2652 _("Error return with body of type `%s'"),
2653 g_variant_get_type_string (body));
2657 g_dbus_error_set_dbus_error (error,
2660 _("Error return with empty body"));
2666 /* TOOD: this shouldn't happen - should check this at message serialization
2667 * time and disconnect the peer.
2672 "Error return without error-name header!");
2681 /* ---------------------------------------------------------------------------------------------------- */
2684 flags_to_string (GType flags_type, guint value)
2690 klass = g_type_class_ref (flags_type);
2691 s = g_string_new (NULL);
2692 for (n = 0; n < 32; n++)
2694 if ((value & (1<<n)) != 0)
2696 GFlagsValue *flags_value;
2697 flags_value = g_flags_get_first_value (klass, (1<<n));
2699 g_string_append_c (s, ',');
2700 if (flags_value != NULL)
2701 g_string_append (s, flags_value->value_nick);
2703 g_string_append_printf (s, "unknown (bit %d)", n);
2707 g_string_append (s, "none");
2708 g_type_class_unref (klass);
2709 return g_string_free (s, FALSE);
2713 _sort_keys_func (gconstpointer a,
2719 ia = GPOINTER_TO_INT (a);
2720 ib = GPOINTER_TO_INT (b);
2726 * g_dbus_message_print:
2727 * @message: A #GDBusMessage.
2728 * @indent: Indentation level.
2730 * Produces a human-readable multi-line description of @message.
2732 * The contents of the description has no ABI guarantees, the contents
2733 * and formatting is subject to change at any time. Typical output
2734 * looks something like this:
2741 * path -> objectpath '/org/gtk/GDBus/TestObject'
2742 * interface -> 'org.gtk.GDBus.TestInterface'
2743 * member -> 'GimmeStdout'
2744 * destination -> ':1.146'
2746 * UNIX File Descriptors:
2751 * Type: method-return
2752 * Flags: no-reply-expected
2756 * reply-serial -> uint32 4
2757 * destination -> ':1.159'
2758 * sender -> ':1.146'
2759 * num-unix-fds -> uint32 1
2761 * UNIX File Descriptors:
2762 * fd 12: dev=0:10,mode=020620,ino=5,uid=500,gid=5,rdev=136:2,size=0,atime=1273085037,mtime=1273085851,ctime=1272982635
2765 * Returns: A string that should be freed with g_free().
2770 g_dbus_message_print (GDBusMessage *message,
2778 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2780 str = g_string_new (NULL);
2782 s = _g_dbus_enum_to_string (G_TYPE_DBUS_MESSAGE_TYPE, message->type);
2783 g_string_append_printf (str, "%*sType: %s\n", indent, "", s);
2785 s = flags_to_string (G_TYPE_DBUS_MESSAGE_FLAGS, message->flags);
2786 g_string_append_printf (str, "%*sFlags: %s\n", indent, "", s);
2788 g_string_append_printf (str, "%*sVersion: %d\n", indent, "", message->major_protocol_version);
2789 g_string_append_printf (str, "%*sSerial: %d\n", indent, "", message->serial);
2791 g_string_append_printf (str, "%*sHeaders:\n", indent, "");
2792 keys = g_hash_table_get_keys (message->headers);
2793 keys = g_list_sort (keys, _sort_keys_func);
2796 for (l = keys; l != NULL; l = l->next)
2798 gint key = GPOINTER_TO_INT (l->data);
2802 value = g_hash_table_lookup (message->headers, l->data);
2803 g_assert (value != NULL);
2805 s = _g_dbus_enum_to_string (G_TYPE_DBUS_MESSAGE_HEADER_FIELD, key);
2806 value_str = g_variant_print (value, TRUE);
2807 g_string_append_printf (str, "%*s %s -> %s\n", indent, "", s, value_str);
2814 g_string_append_printf (str, "%*s (none)\n", indent, "");
2816 g_string_append_printf (str, "%*sBody: ", indent, "");
2817 if (message->body != NULL)
2819 g_variant_print_string (message->body,
2825 g_string_append (str, "()");
2827 g_string_append (str, "\n");
2829 g_string_append_printf (str, "%*sUNIX File Descriptors:\n", indent, "");
2830 if (message->fd_list != NULL)
2836 fds = g_unix_fd_list_peek_fds (message->fd_list, &num_fds);
2839 for (n = 0; n < num_fds; n++)
2842 struct stat statbuf;
2843 fs = g_string_new (NULL);
2844 if (fstat (fds[n], &statbuf) == 0)
2846 g_string_append_printf (fs, "%s" "dev=%d:%d", fs->len > 0 ? "," : "",
2847 major (statbuf.st_dev), minor (statbuf.st_dev));
2848 g_string_append_printf (fs, "%s" "mode=0%o", fs->len > 0 ? "," : "",
2850 g_string_append_printf (fs, "%s" "ino=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
2851 (guint64) statbuf.st_ino);
2852 g_string_append_printf (fs, "%s" "uid=%d", fs->len > 0 ? "," : "",
2854 g_string_append_printf (fs, "%s" "gid=%d", fs->len > 0 ? "," : "",
2856 g_string_append_printf (fs, "%s" "rdev=%d:%d", fs->len > 0 ? "," : "",
2857 major (statbuf.st_rdev), minor (statbuf.st_rdev));
2858 g_string_append_printf (fs, "%s" "size=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
2859 (guint64) statbuf.st_size);
2860 g_string_append_printf (fs, "%s" "atime=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
2861 (guint64) statbuf.st_atime);
2862 g_string_append_printf (fs, "%s" "mtime=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
2863 (guint64) statbuf.st_mtime);
2864 g_string_append_printf (fs, "%s" "ctime=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
2865 (guint64) statbuf.st_ctime);
2869 g_string_append_printf (fs, "(fstat failed: %s)", strerror (errno));
2871 g_string_append_printf (str, "%*s fd %d: %s\n", indent, "", fds[n], fs->str);
2872 g_string_free (fs, TRUE);
2877 g_string_append_printf (str, "%*s (empty)\n", indent, "");
2882 g_string_append_printf (str, "%*s (none)\n", indent, "");
2886 return g_string_free (str, FALSE);