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"
36 * @short_description: Volume management
39 * The #GVolume interface represents user-visible objects that can be
40 * mounted. Note, when porting from GnomeVFS, #GVolume is the moral
41 * equivalent of #GnomeVFSDrive.
43 * Mounting a #GVolume instance is an asynchronous operation. For more
44 * information about asynchronous operations, see #GAsyncReady and
45 * #GSimpleAsyncReady. To mount a #GVolume, first call
46 * g_volume_mount() with (at least) the #GVolume instance, optionally
47 * a #GMountOperation object and a #GAsyncReadyCallback.
49 * Typically, one will only want to pass %NULL for the
50 * #GMountOperation if automounting all volumes when a desktop session
51 * starts since it's not desirable to put up a lot of dialogs asking
54 * The callback will be fired when the operation has resolved (either
55 * with success or failure), and a #GAsyncReady structure will be
56 * passed to the callback. That callback should then call
57 * g_volume_mount_finish() with the #GVolume instance and the
58 * #GAsyncReady data to see if the operation was completed
59 * successfully. If an @error is present when g_volume_mount_finish()
60 * is called, then it will be filled with any error information.
62 * <para id="volume-identifier">
63 * It is sometimes necessary to directly access the underlying
64 * operating system object behind a volume (e.g. for passing a volume
65 * to an application via the commandline). For this purpose, GIO
66 * allows to obtain an 'identifier' for the volume. There can be
67 * different kinds of identifiers, such as Hal UDIs, filesystem labels,
68 * traditional Unix devices (e.g. <filename>/dev/sda2</filename>),
69 * uuids. GIO uses predefind strings as names for the different kinds
70 * of identifiers: #G_VOLUME_IDENTIFIER_KIND_HAL_UDI,
71 * #G_VOLUME_IDENTIFIER_KIND_LABEL, etc. Use g_volume_get_identifier()
72 * to obtain an identifier for a volume.
75 * Note that #G_VOLUME_IDENTIFIER_KIND_HAL_UDI will only be available
76 * when the gvfs hal volume monitor is in use. Other volume monitors
77 * will generally be able to provide the #G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE
78 * identifier, which can be used to obtain a hal device by means of
79 * libhal_manger_find_device_string_match().
82 typedef GVolumeIface GVolumeInterface;
83 G_DEFINE_INTERFACE(GVolume, g_volume, G_TYPE_OBJECT)
86 g_volume_default_init (GVolumeInterface *iface)
91 * Emitted when the volume has been changed.
93 g_signal_new (I_("changed"),
96 G_STRUCT_OFFSET (GVolumeIface, changed),
98 g_cclosure_marshal_VOID__VOID,
104 * This signal is emitted when the #GVolume have been removed. If
105 * the recipient is holding references to the object they should
106 * release them so the object can be finalized.
108 g_signal_new (I_("removed"),
111 G_STRUCT_OFFSET (GVolumeIface, removed),
113 g_cclosure_marshal_VOID__VOID,
119 * @volume: a #GVolume.
121 * Gets the name of @volume.
123 * Returns: the name for the given @volume. The returned string should
124 * be freed with g_free() when no longer needed.
127 g_volume_get_name (GVolume *volume)
131 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
133 iface = G_VOLUME_GET_IFACE (volume);
135 return (* iface->get_name) (volume);
140 * @volume: a #GVolume.
142 * Gets the icon for @volume.
145 * The returned object should be unreffed with g_object_unref()
146 * when no longer needed.
149 g_volume_get_icon (GVolume *volume)
153 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
155 iface = G_VOLUME_GET_IFACE (volume);
157 return (* iface->get_icon) (volume);
162 * @volume: a #GVolume.
164 * Gets the UUID for the @volume. The reference is typically based on
165 * the file system UUID for the volume in question and should be
166 * considered an opaque string. Returns %NULL if there is no UUID
169 * Returns: the UUID for @volume or %NULL if no UUID can be computed.
170 * The returned string should be freed with g_free()
171 * when no longer needed.
174 g_volume_get_uuid (GVolume *volume)
178 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
180 iface = G_VOLUME_GET_IFACE (volume);
182 return (* iface->get_uuid) (volume);
186 * g_volume_get_drive:
187 * @volume: a #GVolume.
189 * Gets the drive for the @volume.
191 * Returns: a #GDrive or %NULL if @volume is not associated with a drive.
192 * The returned object should be unreffed with g_object_unref()
193 * when no longer needed.
196 g_volume_get_drive (GVolume *volume)
200 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
202 iface = G_VOLUME_GET_IFACE (volume);
204 return (* iface->get_drive) (volume);
208 * g_volume_get_mount:
209 * @volume: a #GVolume.
211 * Gets the mount for the @volume.
213 * Returns: a #GMount or %NULL if @volume isn't mounted.
214 * The returned object should be unreffed with g_object_unref()
215 * when no longer needed.
218 g_volume_get_mount (GVolume *volume)
222 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
224 iface = G_VOLUME_GET_IFACE (volume);
226 return (* iface->get_mount) (volume);
231 * g_volume_can_mount:
232 * @volume: a #GVolume.
234 * Checks if a volume can be mounted.
236 * Returns: %TRUE if the @volume can be mounted. %FALSE otherwise.
239 g_volume_can_mount (GVolume *volume)
243 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
245 iface = G_VOLUME_GET_IFACE (volume);
247 if (iface->can_mount == NULL)
250 return (* iface->can_mount) (volume);
254 * g_volume_can_eject:
255 * @volume: a #GVolume.
257 * Checks if a volume can be ejected.
259 * Returns: %TRUE if the @volume can be ejected. %FALSE otherwise.
262 g_volume_can_eject (GVolume *volume)
266 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
268 iface = G_VOLUME_GET_IFACE (volume);
270 if (iface->can_eject == NULL)
273 return (* iface->can_eject) (volume);
277 * g_volume_should_automount:
278 * @volume: a #GVolume
280 * Returns whether the volume should be automatically mounted.
282 * Returns: %TRUE if the volume should be automatically mounted.
285 g_volume_should_automount (GVolume *volume)
289 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
291 iface = G_VOLUME_GET_IFACE (volume);
293 if (iface->should_automount == NULL)
296 return (* iface->should_automount) (volume);
302 * @volume: a #GVolume.
303 * @flags: flags affecting the operation
304 * @mount_operation: a #GMountOperation or %NULL to avoid user interaction.
305 * @cancellable: optional #GCancellable object, %NULL to ignore.
306 * @callback: a #GAsyncReadyCallback, or %NULL.
307 * @user_data: user data that gets passed to @callback
309 * Mounts a volume. This is an asynchronous operation, and is
310 * finished by calling g_volume_mount_finish() with the @volume
311 * and #GAsyncResult returned in the @callback.
314 g_volume_mount (GVolume *volume,
315 GMountMountFlags flags,
316 GMountOperation *mount_operation,
317 GCancellable *cancellable,
318 GAsyncReadyCallback callback,
323 g_return_if_fail (G_IS_VOLUME (volume));
325 iface = G_VOLUME_GET_IFACE (volume);
327 if (iface->mount_fn == NULL)
329 g_simple_async_report_error_in_idle (G_OBJECT (volume), callback, user_data,
330 G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
331 _("volume doesn't implement mount"));
336 (* iface->mount_fn) (volume, flags, mount_operation, cancellable, callback, user_data);
340 * g_volume_mount_finish:
341 * @volume: a #GVolume
342 * @result: a #GAsyncResult
343 * @error: a #GError location to store an error, or %NULL to ignore
345 * Finishes mounting a volume. If any errors occured during the operation,
346 * @error will be set to contain the errors and %FALSE will be returned.
348 * If the mount operation succeeded, g_volume_get_mount() on @volume
349 * is guaranteed to return the mount right after calling this
350 * function; there's no need to listen for the 'mount-added' signal on
353 * Returns: %TRUE, %FALSE if operation failed.
356 g_volume_mount_finish (GVolume *volume,
357 GAsyncResult *result,
362 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
363 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
365 if (G_IS_SIMPLE_ASYNC_RESULT (result))
367 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
368 if (g_simple_async_result_propagate_error (simple, error))
372 iface = G_VOLUME_GET_IFACE (volume);
373 return (* iface->mount_finish) (volume, result, error);
378 * @volume: a #GVolume.
379 * @flags: flags affecting the unmount if required for eject
380 * @cancellable: optional #GCancellable object, %NULL to ignore.
381 * @callback: a #GAsyncReadyCallback, or %NULL.
382 * @user_data: user data that gets passed to @callback
384 * Ejects a volume. This is an asynchronous operation, and is
385 * finished by calling g_volume_eject_finish() with the @volume
386 * and #GAsyncResult returned in the @callback.
388 * Deprecated: 2.22: Use g_volume_eject_with_operation() instead.
391 g_volume_eject (GVolume *volume,
392 GMountUnmountFlags flags,
393 GCancellable *cancellable,
394 GAsyncReadyCallback callback,
399 g_return_if_fail (G_IS_VOLUME (volume));
401 iface = G_VOLUME_GET_IFACE (volume);
403 if (iface->eject == NULL)
405 g_simple_async_report_error_in_idle (G_OBJECT (volume), callback, user_data,
406 G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
407 _("volume doesn't implement eject"));
412 (* iface->eject) (volume, flags, cancellable, callback, user_data);
416 * g_volume_eject_finish:
417 * @volume: pointer to a #GVolume.
418 * @result: a #GAsyncResult.
419 * @error: a #GError location to store an error, or %NULL to ignore
421 * Finishes ejecting a volume. If any errors occured during the operation,
422 * @error will be set to contain the errors and %FALSE will be returned.
424 * Returns: %TRUE, %FALSE if operation failed.
426 * Deprecated: 2.22: Use g_volume_eject_with_operation_finish() instead.
429 g_volume_eject_finish (GVolume *volume,
430 GAsyncResult *result,
435 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
436 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
438 if (G_IS_SIMPLE_ASYNC_RESULT (result))
440 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
441 if (g_simple_async_result_propagate_error (simple, error))
445 iface = G_VOLUME_GET_IFACE (volume);
446 return (* iface->eject_finish) (volume, result, error);
450 * g_volume_eject_with_operation:
451 * @volume: a #GVolume.
452 * @flags: flags affecting the unmount if required for eject
453 * @mount_operation: a #GMountOperation or %NULL to avoid user interaction.
454 * @cancellable: optional #GCancellable object, %NULL to ignore.
455 * @callback: a #GAsyncReadyCallback, or %NULL.
456 * @user_data: user data passed to @callback.
458 * Ejects a volume. This is an asynchronous operation, and is
459 * finished by calling g_volume_eject_with_operation_finish() with the @volume
460 * and #GAsyncResult data returned in the @callback.
465 g_volume_eject_with_operation (GVolume *volume,
466 GMountUnmountFlags flags,
467 GMountOperation *mount_operation,
468 GCancellable *cancellable,
469 GAsyncReadyCallback callback,
474 g_return_if_fail (G_IS_VOLUME (volume));
476 iface = G_VOLUME_GET_IFACE (volume);
478 if (iface->eject == NULL && iface->eject_with_operation == NULL)
480 g_simple_async_report_error_in_idle (G_OBJECT (volume),
482 G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
483 /* Translators: This is an error
484 * message for volume objects that
485 * don't implement any of eject or eject_with_operation. */
486 _("volume doesn't implement eject or eject_with_operation"));
490 if (iface->eject_with_operation != NULL)
491 (* iface->eject_with_operation) (volume, flags, mount_operation, cancellable, callback, user_data);
493 (* iface->eject) (volume, flags, cancellable, callback, user_data);
497 * g_volume_eject_with_operation_finish:
498 * @volume: a #GVolume.
499 * @result: a #GAsyncResult.
500 * @error: a #GError location to store the error occuring, or %NULL to
503 * Finishes ejecting a volume. If any errors occurred during the operation,
504 * @error will be set to contain the errors and %FALSE will be returned.
506 * Returns: %TRUE if the volume was successfully ejected. %FALSE otherwise.
511 g_volume_eject_with_operation_finish (GVolume *volume,
512 GAsyncResult *result,
517 g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
518 g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
520 if (G_IS_SIMPLE_ASYNC_RESULT (result))
522 GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
523 if (g_simple_async_result_propagate_error (simple, error))
527 iface = G_VOLUME_GET_IFACE (volume);
528 if (iface->eject_with_operation_finish != NULL)
529 return (* iface->eject_with_operation_finish) (volume, result, error);
531 return (* iface->eject_finish) (volume, result, error);
535 * g_volume_get_identifier:
536 * @volume: a #GVolume
537 * @kind: the kind of identifier to return
539 * Gets the identifier of the given kind for @volume.
540 * See the <link linkend="volume-identifier">introduction</link>
541 * for more information about volume identifiers.
543 * Returns: a newly allocated string containing the
544 * requested identfier, or %NULL if the #GVolume
545 * doesn't have this kind of identifier
548 g_volume_get_identifier (GVolume *volume,
553 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
554 g_return_val_if_fail (kind != NULL, NULL);
556 iface = G_VOLUME_GET_IFACE (volume);
558 if (iface->get_identifier == NULL)
561 return (* iface->get_identifier) (volume, kind);
565 * g_volume_enumerate_identifiers:
566 * @volume: a #GVolume
568 * Gets the kinds of <link linkend="volume-identifier">identifiers</link>
569 * that @volume has. Use g_volume_get_identifer() to obtain
570 * the identifiers themselves.
572 * Returns: a %NULL-terminated array of strings containing
573 * kinds of identifiers. Use g_strfreev() to free.
576 g_volume_enumerate_identifiers (GVolume *volume)
580 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
581 iface = G_VOLUME_GET_IFACE (volume);
583 if (iface->enumerate_identifiers == NULL)
586 return (* iface->enumerate_identifiers) (volume);
590 * g_volume_get_activation_root:
591 * @volume: a #GVolume
593 * Gets the activation root for a #GVolume if it is known ahead of
594 * mount time. Returns %NULL otherwise. If not %NULL and if @volume
595 * is mounted, then the result of g_mount_get_root() on the
596 * #GMount object obtained from g_volume_get_mount() will always
597 * either be equal or a prefix of what this function returns. In
598 * other words, in code
603 * GFile *volume_activation_root;
605 * mount = g_volume_get_mount (volume); /* mounted, so never NULL */
606 * mount_root = g_mount_get_root (mount);
607 * volume_activation_root = g_volume_get_activation_root(volume); /* assume not NULL */
610 * then the expression
613 * (g_file_has_prefix (volume_activation_root, mount_root) ||
614 g_file_equal (volume_activation_root, mount_root))
617 * will always be %TRUE.
619 * Activation roots are typically used in #GVolumeMonitor
620 * implementations to find the underlying mount to shadow, see
621 * g_mount_is_shadowed() for more details.
623 * Returns: the activation root of @volume or %NULL. Use
624 * g_object_unref() to free.
629 g_volume_get_activation_root (GVolume *volume)
633 g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
634 iface = G_VOLUME_GET_IFACE (volume);
636 if (iface->get_activation_root == NULL)
639 return (* iface->get_activation_root) (volume);
644 #define __G_VOLUME_C__
645 #include "gioaliasdef.c"