/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see .
*
* Author: Alexander Larsson
* David Zeuthen
*/
#include "config.h"
#include "gmount.h"
#include "gvolume.h"
#include "gthemedicon.h"
#include "gasyncresult.h"
#include "gtask.h"
#include "gioerror.h"
#include "glibintl.h"
/**
* GVolume:
*
* The `GVolume` interface represents user-visible objects that can be
* mounted. For example, a file system partition on a USB flash drive, or an
* optical disc inserted into a disc drive.
*
* If a `GVolume` is currently mounted, the corresponding [iface@Gio.Mount] can
* be retrieved using [method@Gio.Volume.get_mount].
*
* Mounting a `GVolume` instance is an asynchronous operation. For more
* information about asynchronous operations, see [iface@Gio.AsyncResult] and
* [class@Gio.Task]. To mount a `GVolume`, first call [method@Gio.Volume.mount]
* with (at least) the `GVolume` instance, optionally a
* [class@Gio.MountOperation] object and a [type@Gio.AsyncReadyCallback].
*
* Typically, one will only want to pass `NULL` for the
* [class@Gio.MountOperation] if automounting all volumes when a desktop session
* starts since it’s not desirable to put up a lot of dialogs asking
* for credentials.
*
* The callback will be fired when the operation has resolved (either
* with success or failure), and a [iface@Gio.AsyncResult] instance will be
* passed to the callback. That callback should then call
* [method@Gio.Volume.mount_finish] with the `GVolume` instance and the
* [iface@Gio.AsyncResult] data to see if the operation was completed
* successfully. If a [type@GLib.Error] is present when
* [method@Gio.Volume.mount_finish] is called, then it will be filled with any
* error information.
*
* Note, when [porting from GnomeVFS](migrating-gnome-vfs.html),
* `GVolume` is the moral equivalent of `GnomeVFSDrive`.
*
* ## Volume Identifiers
*
* It is sometimes necessary to directly access the underlying
* operating system object behind a volume (e.g. for passing a volume
* to an application via the command line). For this purpose, GIO
* allows to obtain an ‘identifier’ for the volume. There can be
* different kinds of identifiers, such as Hal UDIs, filesystem labels,
* traditional Unix devices (e.g. `/dev/sda2`), UUIDs. GIO uses predefined
* strings as names for the different kinds of identifiers:
* `G_VOLUME_IDENTIFIER_KIND_UUID`, `G_VOLUME_IDENTIFIER_KIND_LABEL`, etc.
* Use [method@Gio.Volume.get_identifier] to obtain an identifier for a volume.
*
* Note that `G_VOLUME_IDENTIFIER_KIND_HAL_UDI` will only be available
* when the GVFS hal volume monitor is in use. Other volume monitors
* will generally be able to provide the `G_VOLUME_IDENTIFIER_KIND_UNIX_DEVICE`
* identifier, which can be used to obtain a hal device by means of
* `libhal_manager_find_device_string_match()`.
*/
typedef GVolumeIface GVolumeInterface;
G_DEFINE_INTERFACE(GVolume, g_volume, G_TYPE_OBJECT)
static void
g_volume_default_init (GVolumeInterface *iface)
{
/**
* GVolume::changed:
*
* Emitted when the volume has been changed.
*/
g_signal_new (I_("changed"),
G_TYPE_VOLUME,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GVolumeIface, changed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GVolume::removed:
*
* This signal is emitted when the #GVolume have been removed. If
* the recipient is holding references to the object they should
* release them so the object can be finalized.
*/
g_signal_new (I_("removed"),
G_TYPE_VOLUME,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GVolumeIface, removed),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
}
/**
* g_volume_get_name:
* @volume: a #GVolume
*
* Gets the name of @volume.
*
* Returns: the name for the given @volume. The returned string should
* be freed with g_free() when no longer needed.
*/
char *
g_volume_get_name (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
return (* iface->get_name) (volume);
}
/**
* g_volume_get_icon:
* @volume: a #GVolume
*
* Gets the icon for @volume.
*
* Returns: (transfer full): a #GIcon.
* The returned object should be unreffed with g_object_unref()
* when no longer needed.
*/
GIcon *
g_volume_get_icon (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
return (* iface->get_icon) (volume);
}
/**
* g_volume_get_symbolic_icon:
* @volume: a #GVolume
*
* Gets the symbolic icon for @volume.
*
* Returns: (transfer full): a #GIcon.
* The returned object should be unreffed with g_object_unref()
* when no longer needed.
*
* Since: 2.34
*/
GIcon *
g_volume_get_symbolic_icon (GVolume *volume)
{
GVolumeIface *iface;
GIcon *ret;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->get_symbolic_icon != NULL)
ret = iface->get_symbolic_icon (volume);
else
ret = g_themed_icon_new_with_default_fallbacks ("folder-remote-symbolic");
return ret;
}
/**
* g_volume_get_uuid:
* @volume: a #GVolume
*
* Gets the UUID for the @volume. The reference is typically based on
* the file system UUID for the volume in question and should be
* considered an opaque string. Returns %NULL if there is no UUID
* available.
*
* Returns: (nullable) (transfer full): the UUID for @volume or %NULL if no UUID
* can be computed.
* The returned string should be freed with g_free()
* when no longer needed.
*/
char *
g_volume_get_uuid (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
return (* iface->get_uuid) (volume);
}
/**
* g_volume_get_drive:
* @volume: a #GVolume
*
* Gets the drive for the @volume.
*
* Returns: (transfer full) (nullable): a #GDrive or %NULL if @volume is not
* associated with a drive. The returned object should be unreffed
* with g_object_unref() when no longer needed.
*/
GDrive *
g_volume_get_drive (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
return (* iface->get_drive) (volume);
}
/**
* g_volume_get_mount:
* @volume: a #GVolume
*
* Gets the mount for the @volume.
*
* Returns: (transfer full) (nullable): a #GMount or %NULL if @volume isn't mounted.
* The returned object should be unreffed with g_object_unref()
* when no longer needed.
*/
GMount *
g_volume_get_mount (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
return (* iface->get_mount) (volume);
}
/**
* g_volume_can_mount:
* @volume: a #GVolume
*
* Checks if a volume can be mounted.
*
* Returns: %TRUE if the @volume can be mounted. %FALSE otherwise
*/
gboolean
g_volume_can_mount (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->can_mount == NULL)
return FALSE;
return (* iface->can_mount) (volume);
}
/**
* g_volume_can_eject:
* @volume: a #GVolume
*
* Checks if a volume can be ejected.
*
* Returns: %TRUE if the @volume can be ejected. %FALSE otherwise
*/
gboolean
g_volume_can_eject (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->can_eject == NULL)
return FALSE;
return (* iface->can_eject) (volume);
}
/**
* g_volume_should_automount:
* @volume: a #GVolume
*
* Returns whether the volume should be automatically mounted.
*
* Returns: %TRUE if the volume should be automatically mounted
*/
gboolean
g_volume_should_automount (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->should_automount == NULL)
return FALSE;
return (* iface->should_automount) (volume);
}
/**
* g_volume_mount: (virtual mount_fn)
* @volume: a #GVolume
* @flags: flags affecting the operation
* @mount_operation: (nullable): a #GMountOperation or %NULL to avoid user interaction
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback, or %NULL
* @user_data: user data that gets passed to @callback
*
* Mounts a volume. This is an asynchronous operation, and is
* finished by calling g_volume_mount_finish() with the @volume
* and #GAsyncResult returned in the @callback.
*/
void
g_volume_mount (GVolume *volume,
GMountMountFlags flags,
GMountOperation *mount_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GVolumeIface *iface;
g_return_if_fail (G_IS_VOLUME (volume));
iface = G_VOLUME_GET_IFACE (volume);
if (iface->mount_fn == NULL)
{
g_task_report_new_error (volume, callback, user_data,
g_volume_mount,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("volume doesn’t implement mount"));
return;
}
(* iface->mount_fn) (volume, flags, mount_operation, cancellable, callback, user_data);
}
/**
* g_volume_mount_finish:
* @volume: a #GVolume
* @result: a #GAsyncResult
* @error: a #GError location to store an error, or %NULL to ignore
*
* Finishes mounting a volume. If any errors occurred during the operation,
* @error will be set to contain the errors and %FALSE will be returned.
*
* If the mount operation succeeded, g_volume_get_mount() on @volume
* is guaranteed to return the mount right after calling this
* function; there's no need to listen for the 'mount-added' signal on
* #GVolumeMonitor.
*
* Returns: %TRUE, %FALSE if operation failed
*/
gboolean
g_volume_mount_finish (GVolume *volume,
GAsyncResult *result,
GError **error)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_volume_mount))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_VOLUME_GET_IFACE (volume);
return (* iface->mount_finish) (volume, result, error);
}
/**
* g_volume_eject:
* @volume: a #GVolume
* @flags: flags affecting the unmount if required for eject
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback, or %NULL
* @user_data: user data that gets passed to @callback
*
* Ejects a volume. This is an asynchronous operation, and is
* finished by calling g_volume_eject_finish() with the @volume
* and #GAsyncResult returned in the @callback.
*
* Deprecated: 2.22: Use g_volume_eject_with_operation() instead.
*/
void
g_volume_eject (GVolume *volume,
GMountUnmountFlags flags,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GVolumeIface *iface;
g_return_if_fail (G_IS_VOLUME (volume));
iface = G_VOLUME_GET_IFACE (volume);
if (iface->eject == NULL)
{
g_task_report_new_error (volume, callback, user_data,
g_volume_eject_with_operation,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
_("volume doesn’t implement eject"));
return;
}
(* iface->eject) (volume, flags, cancellable, callback, user_data);
}
/**
* g_volume_eject_finish:
* @volume: pointer to a #GVolume
* @result: a #GAsyncResult
* @error: a #GError location to store an error, or %NULL to ignore
*
* Finishes ejecting a volume. If any errors occurred during the operation,
* @error will be set to contain the errors and %FALSE will be returned.
*
* Returns: %TRUE, %FALSE if operation failed
*
* Deprecated: 2.22: Use g_volume_eject_with_operation_finish() instead.
**/
gboolean
g_volume_eject_finish (GVolume *volume,
GAsyncResult *result,
GError **error)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
if (g_async_result_is_tagged (result, g_volume_eject_with_operation))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_VOLUME_GET_IFACE (volume);
return (* iface->eject_finish) (volume, result, error);
}
/**
* g_volume_eject_with_operation:
* @volume: a #GVolume
* @flags: flags affecting the unmount if required for eject
* @mount_operation: (nullable): a #GMountOperation or %NULL to
* avoid user interaction
* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore
* @callback: (nullable): a #GAsyncReadyCallback, or %NULL
* @user_data: user data passed to @callback
*
* Ejects a volume. This is an asynchronous operation, and is
* finished by calling g_volume_eject_with_operation_finish() with the @volume
* and #GAsyncResult data returned in the @callback.
*
* Since: 2.22
**/
void
g_volume_eject_with_operation (GVolume *volume,
GMountUnmountFlags flags,
GMountOperation *mount_operation,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GVolumeIface *iface;
g_return_if_fail (G_IS_VOLUME (volume));
iface = G_VOLUME_GET_IFACE (volume);
if (iface->eject == NULL && iface->eject_with_operation == NULL)
{
g_task_report_new_error (volume, callback, user_data,
g_volume_eject_with_operation,
G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
/* Translators: This is an error
* message for volume objects that
* don't implement any of eject or eject_with_operation. */
_("volume doesn’t implement eject or eject_with_operation"));
return;
}
if (iface->eject_with_operation != NULL)
(* iface->eject_with_operation) (volume, flags, mount_operation, cancellable, callback, user_data);
else
(* iface->eject) (volume, flags, cancellable, callback, user_data);
}
/**
* g_volume_eject_with_operation_finish:
* @volume: a #GVolume
* @result: a #GAsyncResult
* @error: a #GError location to store the error occurring, or %NULL
*
* Finishes ejecting a volume. If any errors occurred during the operation,
* @error will be set to contain the errors and %FALSE will be returned.
*
* Returns: %TRUE if the volume was successfully ejected. %FALSE otherwise
*
* Since: 2.22
**/
gboolean
g_volume_eject_with_operation_finish (GVolume *volume,
GAsyncResult *result,
GError **error)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), FALSE);
g_return_val_if_fail (G_IS_ASYNC_RESULT (result), FALSE);
if (g_async_result_legacy_propagate_error (result, error))
return FALSE;
else if (g_async_result_is_tagged (result, g_volume_eject_with_operation))
return g_task_propagate_boolean (G_TASK (result), error);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->eject_with_operation_finish != NULL)
return (* iface->eject_with_operation_finish) (volume, result, error);
else
return (* iface->eject_finish) (volume, result, error);
}
/**
* g_volume_get_identifier:
* @volume: a #GVolume
* @kind: the kind of identifier to return
*
* Gets the identifier of the given kind for @volume.
* See the [introduction](#volume-identifiers) for more
* information about volume identifiers.
*
* Returns: (nullable) (transfer full): a newly allocated string containing the
* requested identifier, or %NULL if the #GVolume
* doesn't have this kind of identifier
*/
char *
g_volume_get_identifier (GVolume *volume,
const char *kind)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
g_return_val_if_fail (kind != NULL, NULL);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->get_identifier == NULL)
return NULL;
return (* iface->get_identifier) (volume, kind);
}
/**
* g_volume_enumerate_identifiers:
* @volume: a #GVolume
*
* Gets the kinds of [identifiers](#volume-identifiers) that @volume has.
* Use g_volume_get_identifier() to obtain the identifiers themselves.
*
* Returns: (array zero-terminated=1) (transfer full): a %NULL-terminated array
* of strings containing kinds of identifiers. Use g_strfreev() to free.
*/
char **
g_volume_enumerate_identifiers (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->enumerate_identifiers == NULL)
return NULL;
return (* iface->enumerate_identifiers) (volume);
}
/**
* g_volume_get_activation_root:
* @volume: a #GVolume
*
* Gets the activation root for a #GVolume if it is known ahead of
* mount time. Returns %NULL otherwise. If not %NULL and if @volume
* is mounted, then the result of g_mount_get_root() on the
* #GMount object obtained from g_volume_get_mount() will always
* either be equal or a prefix of what this function returns. In
* other words, in code
*
* |[
* GMount *mount;
* GFile *mount_root
* GFile *volume_activation_root;
*
* mount = g_volume_get_mount (volume); // mounted, so never NULL
* mount_root = g_mount_get_root (mount);
* volume_activation_root = g_volume_get_activation_root (volume); // assume not NULL
* ]|
* then the expression
* |[
* (g_file_has_prefix (volume_activation_root, mount_root) ||
* g_file_equal (volume_activation_root, mount_root))
* ]|
* will always be %TRUE.
*
* Activation roots are typically used in #GVolumeMonitor
* implementations to find the underlying mount to shadow, see
* g_mount_is_shadowed() for more details.
*
* Returns: (nullable) (transfer full): the activation root of @volume
* or %NULL. Use g_object_unref() to free.
*
* Since: 2.18
*/
GFile *
g_volume_get_activation_root (GVolume *volume)
{
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->get_activation_root == NULL)
return NULL;
return (* iface->get_activation_root) (volume);
}
/**
* g_volume_get_sort_key:
* @volume: a #GVolume
*
* Gets the sort key for @volume, if any.
*
* Returns: (nullable): Sorting key for @volume or %NULL if no such key is available
*
* Since: 2.32
*/
const gchar *
g_volume_get_sort_key (GVolume *volume)
{
const gchar *ret = NULL;
GVolumeIface *iface;
g_return_val_if_fail (G_IS_VOLUME (volume), NULL);
iface = G_VOLUME_GET_IFACE (volume);
if (iface->get_sort_key != NULL)
ret = iface->get_sort_key (volume);
return ret;
}