1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 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: Alexander Larsson <alexl@redhat.com>
21 * David Zeuthen <davidz@redhat.com>
27 #include "gasyncresult.h"
28 #include "gsimpleasyncresult.h"
35 * @short_description: Volume management
38 * The #GVolume interface represents user-visible objects that can be
39 * mounted. Note, when porting from GnomeVFS, #GVolume is the moral
40 * equivalent of #GnomeVFSDrive.
42 * Mounting a #GVolume instance is an asynchronous operation. For more
43 * information about asynchronous operations, see #GAsyncResult and
44 * #GSimpleAsyncResult. To mount a #GVolume, first call
45 * g_volume_mount() with (at least) the #GVolume instance, optionally
46 * a #GMountOperation object and a #GAsyncReadyCallback.
48 * Typically, one will only want to pass %NULL for the
49 * #GMountOperation if automounting all volumes when a desktop session
50 * starts since it's not desirable to put up a lot of dialogs asking
53 * The callback will be fired when the operation has resolved (either
54 * with success or failure), and a #GAsyncReady structure will be
55 * passed to the callback. That callback should then call
56 * g_volume_mount_finish() with the #GVolume instance and the
57 * #GAsyncReady data to see if the operation was completed
58 * successfully. If an @error is present when g_volume_mount_finish()
59 * is called, then it will be filled with any error information.
61 * <para id="volume-identifier">
62 * It is sometimes necessary to directly access the underlying
63 * operating system object behind a volume (e.g. for passing a volume
64 * to an application via the commandline). For this purpose, GIO
65 * allows to obtain an 'identifier' for the volume. There can be
66 * different kinds of identifiers, such as Hal UDIs, filesystem labels,
67 * traditional Unix devices (e.g. <filename>/dev/sda2</filename>),
68 * uuids. GIO uses predefind strings as names for the different kinds
69 * of identifiers: #G_VOLUME_IDENTIFIER_KIND_HAL_UDI,
70 * #G_VOLUME_IDENTIFIER_KIND_LABEL, etc. Use g_volume_get_identifier()
71 * to obtain an identifier for a volume.
74 * Note that #G_VOLUME_IDENTIFIER_KIND_HAL_UDI will only be available
75 * when the gvfs hal volume monitor is in use. Other volume monitors
76 * will generally be able to provide the #G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE
77 * identifier, which can be used to obtain a hal device by means of
78 * libhal_manager_find_device_string_match().
81 typedef GVolumeIface GVolumeInterface;
82 G_DEFINE_INTERFACE(GVolume, g_volume, G_TYPE_OBJECT)
85 g_volume_default_init (GVolumeInterface *iface)
90 * Emitted when the volume has been changed.
92 g_signal_new (I_("changed"),
95 G_STRUCT_OFFSET (GVolumeIface, changed),
97 g_cclosure_marshal_VOID__VOID,
103 * This signal is emitted when the #GVolume have been removed. If
104 * the recipient is holding references to the object they should
105 * release them so the object can be finalized.
107 g_signal_new (I_("removed"),
110 G_STRUCT_OFFSET (GVolumeIface, removed),
112 g_cclosure_marshal_VOID__VOID,
118 * @volume: a #GVolume.
120 * Gets the name of @volume.
122 * Returns: the name for the given @volume. The returned string should
123 * be freed with g_free() when no longer needed.
126 g_volume_get_name (GVolume *volume)
130 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
132 iface = G_VOLUME_GET_IFACE (volume);
134 return (* iface->get_name) (volume);
139 * @volume: a #GVolume.
141 * Gets the icon for @volume.
143 * Returns: (transfer full): a #GIcon.
144 * The returned object should be unreffed with g_object_unref()
145 * when no longer needed.
148 g_volume_get_icon (GVolume *volume)
152 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
154 iface = G_VOLUME_GET_IFACE (volume);
156 return (* iface->get_icon) (volume);
161 * @volume: a #GVolume.
163 * Gets the UUID for the @volume. The reference is typically based on
164 * the file system UUID for the volume in question and should be
165 * considered an opaque string. Returns %NULL if there is no UUID
168 * Returns: the UUID for @volume or %NULL if no UUID can be computed.
169 * The returned string should be freed with g_free()
170 * when no longer needed.
173 g_volume_get_uuid (GVolume *volume)
177 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
179 iface = G_VOLUME_GET_IFACE (volume);
181 return (* iface->get_uuid) (volume);
185 * g_volume_get_drive:
186 * @volume: a #GVolume.
188 * Gets the drive for the @volume.
190 * Returns: (transfer full): a #GDrive or %NULL if @volume is not associated with a drive.
191 * The returned object should be unreffed with g_object_unref()
192 * when no longer needed.
195 g_volume_get_drive (GVolume *volume)
199 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
201 iface = G_VOLUME_GET_IFACE (volume);
203 return (* iface->get_drive) (volume);
207 * g_volume_get_mount:
208 * @volume: a #GVolume.
210 * Gets the mount for the @volume.
212 * Returns: (transfer full): a #GMount or %NULL if @volume isn't mounted.
213 * The returned object should be unreffed with g_object_unref()
214 * when no longer needed.
217 g_volume_get_mount (GVolume *volume)
221 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
223 iface = G_VOLUME_GET_IFACE (volume);
225 return (* iface->get_mount) (volume);
230 * g_volume_can_mount:
231 * @volume: a #GVolume.
233 * Checks if a volume can be mounted.
235 * Returns: %TRUE if the @volume can be mounted. %FALSE otherwise.
238 g_volume_can_mount (GVolume *volume)
242 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
244 iface = G_VOLUME_GET_IFACE (volume);
246 if (iface->can_mount == NULL)
249 return (* iface->can_mount) (volume);
253 * g_volume_can_eject:
254 * @volume: a #GVolume.
256 * Checks if a volume can be ejected.
258 * Returns: %TRUE if the @volume can be ejected. %FALSE otherwise.
261 g_volume_can_eject (GVolume *volume)
265 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
267 iface = G_VOLUME_GET_IFACE (volume);
269 if (iface->can_eject == NULL)
272 return (* iface->can_eject) (volume);
276 * g_volume_should_automount:
277 * @volume: a #GVolume
279 * Returns whether the volume should be automatically mounted.
281 * Returns: %TRUE if the volume should be automatically mounted.
284 g_volume_should_automount (GVolume *volume)
288 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
290 iface = G_VOLUME_GET_IFACE (volume);
292 if (iface->should_automount == NULL)
295 return (* iface->should_automount) (volume);
301 * @volume: a #GVolume.
302 * @flags: flags affecting the operation
303 * @mount_operation: (allow-none): a #GMountOperation or %NULL to avoid user interaction.
304 * @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
305 * @callback: (allow-none): a #GAsyncReadyCallback, or %NULL.
306 * @user_data: user data that gets passed to @callback
308 * Mounts a volume. This is an asynchronous operation, and is
309 * finished by calling g_volume_mount_finish() with the @volume
310 * and #GAsyncResult returned in the @callback.
315 g_volume_mount (GVolume *volume,
316 GMountMountFlags flags,
317 GMountOperation *mount_operation,
318 GCancellable *cancellable,
319 GAsyncReadyCallback callback,
324 g_return_if_fail (G_IS_VOLUME (volume));
326 iface = G_VOLUME_GET_IFACE (volume);
328 if (iface->mount_fn == NULL)
330 g_simple_async_report_error_in_idle (G_OBJECT (volume), callback, user_data,
331 G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
332 _("volume doesn't implement mount"));
337 (* iface->mount_fn) (volume, flags, mount_operation, cancellable, callback, user_data);
341 * g_volume_mount_finish:
342 * @volume: a #GVolume
343 * @result: a #GAsyncResult
344 * @error: a #GError location to store an error, or %NULL to ignore
346 * Finishes mounting a volume. If any errors occurred during the operation,
347 * @error will be set to contain the errors and %FALSE will be returned.
349 * If the mount operation succeeded, g_volume_get_mount() on @volume
350 * is guaranteed to return the mount right after calling this
351 * function; there's no need to listen for the 'mount-added' signal on
354 * Returns: %TRUE, %FALSE if operation failed.
357 g_volume_mount_finish (GVolume *volume,
358 GAsyncResult *result,
363 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
364 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
366 if (g_async_result_legacy_propagate_error (result, error))
369 iface = G_VOLUME_GET_IFACE (volume);
370 return (* iface->mount_finish) (volume, result, error);
375 * @volume: a #GVolume.
376 * @flags: flags affecting the unmount if required for eject
377 * @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
378 * @callback: (allow-none): a #GAsyncReadyCallback, or %NULL.
379 * @user_data: user data that gets passed to @callback
381 * Ejects a volume. This is an asynchronous operation, and is
382 * finished by calling g_volume_eject_finish() with the @volume
383 * and #GAsyncResult returned in the @callback.
385 * Deprecated: 2.22: Use g_volume_eject_with_operation() instead.
388 g_volume_eject (GVolume *volume,
389 GMountUnmountFlags flags,
390 GCancellable *cancellable,
391 GAsyncReadyCallback callback,
396 g_return_if_fail (G_IS_VOLUME (volume));
398 iface = G_VOLUME_GET_IFACE (volume);
400 if (iface->eject == NULL)
402 g_simple_async_report_error_in_idle (G_OBJECT (volume), callback, user_data,
403 G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
404 _("volume doesn't implement eject"));
409 (* iface->eject) (volume, flags, cancellable, callback, user_data);
413 * g_volume_eject_finish:
414 * @volume: pointer to a #GVolume.
415 * @result: a #GAsyncResult.
416 * @error: a #GError location to store an error, or %NULL to ignore
418 * Finishes ejecting a volume. If any errors occurred during the operation,
419 * @error will be set to contain the errors and %FALSE will be returned.
421 * Returns: %TRUE, %FALSE if operation failed.
423 * Deprecated: 2.22: Use g_volume_eject_with_operation_finish() instead.
426 g_volume_eject_finish (GVolume *volume,
427 GAsyncResult *result,
432 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
433 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
435 if (g_async_result_legacy_propagate_error (result, error))
438 iface = G_VOLUME_GET_IFACE (volume);
439 return (* iface->eject_finish) (volume, result, error);
443 * g_volume_eject_with_operation:
444 * @volume: a #GVolume.
445 * @flags: flags affecting the unmount if required for eject
446 * @mount_operation: (allow-none): a #GMountOperation or %NULL to
447 * avoid user interaction.
448 * @cancellable: (allow-none): optional #GCancellable object, %NULL to ignore.
449 * @callback: (allow-none): a #GAsyncReadyCallback, or %NULL.
450 * @user_data: user data passed to @callback.
452 * Ejects a volume. This is an asynchronous operation, and is
453 * finished by calling g_volume_eject_with_operation_finish() with the @volume
454 * and #GAsyncResult data returned in the @callback.
459 g_volume_eject_with_operation (GVolume *volume,
460 GMountUnmountFlags flags,
461 GMountOperation *mount_operation,
462 GCancellable *cancellable,
463 GAsyncReadyCallback callback,
468 g_return_if_fail (G_IS_VOLUME (volume));
470 iface = G_VOLUME_GET_IFACE (volume);
472 if (iface->eject == NULL && iface->eject_with_operation == NULL)
474 g_simple_async_report_error_in_idle (G_OBJECT (volume),
476 G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
477 /* Translators: This is an error
478 * message for volume objects that
479 * don't implement any of eject or eject_with_operation. */
480 _("volume doesn't implement eject or eject_with_operation"));
484 if (iface->eject_with_operation != NULL)
485 (* iface->eject_with_operation) (volume, flags, mount_operation, cancellable, callback, user_data);
487 (* iface->eject) (volume, flags, cancellable, callback, user_data);
491 * g_volume_eject_with_operation_finish:
492 * @volume: a #GVolume.
493 * @result: a #GAsyncResult.
494 * @error: a #GError location to store the error occurring, or %NULL to
497 * Finishes ejecting a volume. If any errors occurred during the operation,
498 * @error will be set to contain the errors and %FALSE will be returned.
500 * Returns: %TRUE if the volume was successfully ejected. %FALSE otherwise.
505 g_volume_eject_with_operation_finish (GVolume *volume,
506 GAsyncResult *result,
511 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
512 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
514 if (g_async_result_legacy_propagate_error (result, error))
517 iface = G_VOLUME_GET_IFACE (volume);
518 if (iface->eject_with_operation_finish != NULL)
519 return (* iface->eject_with_operation_finish) (volume, result, error);
521 return (* iface->eject_finish) (volume, result, error);
525 * g_volume_get_identifier:
526 * @volume: a #GVolume
527 * @kind: the kind of identifier to return
529 * Gets the identifier of the given kind for @volume.
530 * See the <link linkend="volume-identifier">introduction</link>
531 * for more information about volume identifiers.
533 * Returns: a newly allocated string containing the
534 * requested identfier, or %NULL if the #GVolume
535 * doesn't have this kind of identifier
538 g_volume_get_identifier (GVolume *volume,
543 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
544 g_return_val_if_fail (kind != NULL, NULL);
546 iface = G_VOLUME_GET_IFACE (volume);
548 if (iface->get_identifier == NULL)
551 return (* iface->get_identifier) (volume, kind);
555 * g_volume_enumerate_identifiers:
556 * @volume: a #GVolume
558 * Gets the kinds of <link linkend="volume-identifier">identifiers</link>
559 * that @volume has. Use g_volume_get_identifier() to obtain
560 * the identifiers themselves.
562 * Returns: (array zero-terminated=1) (transfer full): a %NULL-terminated array
563 * of strings containing kinds of identifiers. Use g_strfreev() to free.
566 g_volume_enumerate_identifiers (GVolume *volume)
570 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
571 iface = G_VOLUME_GET_IFACE (volume);
573 if (iface->enumerate_identifiers == NULL)
576 return (* iface->enumerate_identifiers) (volume);
580 * g_volume_get_activation_root:
581 * @volume: a #GVolume
583 * Gets the activation root for a #GVolume if it is known ahead of
584 * mount time. Returns %NULL otherwise. If not %NULL and if @volume
585 * is mounted, then the result of g_mount_get_root() on the
586 * #GMount object obtained from g_volume_get_mount() will always
587 * either be equal or a prefix of what this function returns. In
588 * other words, in code
593 * GFile *volume_activation_root;
595 * mount = g_volume_get_mount (volume); /* mounted, so never NULL */
596 * mount_root = g_mount_get_root (mount);
597 * volume_activation_root = g_volume_get_activation_root(volume); /* assume not NULL */
600 * then the expression
603 * (g_file_has_prefix (volume_activation_root, mount_root) ||
604 g_file_equal (volume_activation_root, mount_root))
607 * will always be %TRUE.
609 * Activation roots are typically used in #GVolumeMonitor
610 * implementations to find the underlying mount to shadow, see
611 * g_mount_is_shadowed() for more details.
613 * Returns: (transfer full): the activation root of @volume or %NULL. Use
614 * g_object_unref() to free.
619 g_volume_get_activation_root (GVolume *volume)
623 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
624 iface = G_VOLUME_GET_IFACE (volume);
626 if (iface->get_activation_root == NULL)
629 return (* iface->get_activation_root) (volume);
633 * g_volume_get_sort_key:
634 * @volume: A #GVolume.
636 * Gets the sort key for @volume, if any.
638 * Returns: Sorting key for @volume or %NULL if no such key is available.
643 g_volume_get_sort_key (GVolume *volume)
645 const gchar *ret = NULL;
648 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
650 iface = G_VOLUME_GET_IFACE (volume);
651 if (iface->get_sort_key != NULL)
652 ret = iface->get_sort_key (volume);