GMount: GIO Reference Manual

GMount

GMount — Mount management

Functions

char *	g_mount_get_name ()
char *	g_mount_get_uuid ()
GIcon *	g_mount_get_icon ()
GIcon *	g_mount_get_symbolic_icon ()
GDrive *	g_mount_get_drive ()
GFile *	g_mount_get_root ()
GVolume *	g_mount_get_volume ()
GFile *	g_mount_get_default_location ()
gboolean	g_mount_can_unmount ()
void	g_mount_unmount ()
gboolean	g_mount_unmount_finish ()
void	g_mount_unmount_with_operation ()
gboolean	g_mount_unmount_with_operation_finish ()
void	g_mount_remount ()
gboolean	g_mount_remount_finish ()
gboolean	g_mount_can_eject ()
void	g_mount_eject ()
gboolean	g_mount_eject_finish ()
void	g_mount_eject_with_operation ()
gboolean	g_mount_eject_with_operation_finish ()
void	g_mount_guess_content_type ()
gchar **	g_mount_guess_content_type_finish ()
gchar **	g_mount_guess_content_type_sync ()
gboolean	g_mount_is_shadowed ()
void	g_mount_shadow ()
void	g_mount_unshadow ()
const gchar *	g_mount_get_sort_key ()

Signals

void	changed	Run Last
void	pre-unmount	Run Last
void	unmounted	Run Last

Types and Values

	GMount
struct	GMountIface
enum	GMountMountFlags
enum	GMountUnmountFlags

Object Hierarchy

    GInterface
    ╰── GMount

Prerequisites

GMount requires GObject.

Includes

#include <gio/gio.h>

Description

The GMount interface represents user-visible mounts. Note, when porting from GnomeVFS, GMount is the moral equivalent of GnomeVFSVolume.

GMount is a "mounted" filesystem that you can access. Mounted is in quotes because it's not the same as a unix mount, it might be a gvfs mount, but you can still access the files on it if you use GIO. Might or might not be related to a volume object.

Unmounting a GMount instance is an asynchronous operation. For more information about asynchronous operations, see GAsyncResult and GTask. To unmount a GMount instance, first call g_mount_unmount_with_operation() with (at least) the GMount instance and a GAsyncReadyCallback. The callback will be fired when the operation has resolved (either with success or failure), and a GAsyncResult structure will be passed to the callback. That callback should then call g_mount_unmount_with_operation_finish() with the GMount and the GAsyncResult data to see if the operation was completed successfully. If an error is present when g_mount_unmount_with_operation_finish() is called, then it will be filled with any error information.

Functions

g_mount_get_name ()

char *
g_mount_get_name (GMount *mount);

Gets the name of mount .

Parameters

mount

a GMount.

Returns

the name for the given mount . The returned string should be freed with g_free() when no longer needed.

g_mount_get_uuid ()

char *
g_mount_get_uuid (GMount *mount);

Gets the UUID for the mount . The reference is typically based on the file system UUID for the mount in question and should be considered an opaque string. Returns NULL if there is no UUID available.

Parameters

mount

a GMount.

Returns

the UUID for mount or NULL if no UUID can be computed. The returned string should be freed with g_free() when no longer needed.

g_mount_get_icon ()

GIcon *
g_mount_get_icon (GMount *mount);

Gets the icon for mount .

Parameters

mount

a GMount.

Returns

a GIcon. The returned object should be unreffed with g_object_unref() when no longer needed.

[transfer full]

g_mount_get_symbolic_icon ()

GIcon *
g_mount_get_symbolic_icon (GMount *mount);

Gets the symbolic icon for mount .

Parameters

mount

a GMount.

Returns

a GIcon. The returned object should be unreffed with g_object_unref() when no longer needed.

[transfer full]

Since: 2.34

g_mount_get_drive ()

GDrive *
g_mount_get_drive (GMount *mount);

Gets the drive for the mount .

This is a convenience method for getting the GVolume and then using that object to get the GDrive.

Parameters

mount

a GMount.

Returns

a GDrive or NULL if mount is not associated with a volume or a drive. The returned object should be unreffed with g_object_unref() when no longer needed.

[transfer full]

g_mount_get_root ()

GFile *
g_mount_get_root (GMount *mount);

Gets the root directory on mount .

Parameters

mount

a GMount.

Returns

a GFile. The returned object should be unreffed with g_object_unref() when no longer needed.

[transfer full]

g_mount_get_volume ()

GVolume *
g_mount_get_volume (GMount *mount);

Gets the volume for the mount .

Parameters

mount

a GMount.

Returns

a GVolume or NULL if mount is not associated with a volume. The returned object should be unreffed with g_object_unref() when no longer needed.

[transfer full]

g_mount_get_default_location ()

GFile *
g_mount_get_default_location (GMount *mount);

Gets the default location of mount . The default location of the given mount is a path that reflects the main entry point for the user (e.g. the home directory, or the root of the volume).

Parameters

mount

a GMount.

Returns

a GFile. The returned object should be unreffed with g_object_unref() when no longer needed.

[transfer full]

g_mount_can_unmount ()

gboolean
g_mount_can_unmount (GMount *mount);

Checks if mount can be unmounted.

Parameters

mount

a GMount.

Returns

TRUE if the mount can be unmounted.

g_mount_unmount ()

void
g_mount_unmount (GMount *mount,
                 GMountUnmountFlags flags,
                 GCancellable *cancellable,
                 GAsyncReadyCallback callback,
                 gpointer user_data);

g_mount_unmount has been deprecated since version 2.22 and should not be used in newly-written code.

Use g_mount_unmount_with_operation() instead.

Unmounts a mount. This is an asynchronous operation, and is finished by calling g_mount_unmount_finish() with the mount and GAsyncResult data returned in the callback .

Parameters

mount	a GMount.
flags	flags affecting the operation
cancellable	optional GCancellable object, `NULL` to ignore.	[nullable]
callback	a GAsyncReadyCallback, or `NULL`.	[nullable]
user_data	user data passed to `callback` .

g_mount_unmount_finish ()

gboolean
g_mount_unmount_finish (GMount *mount,
                        GAsyncResult *result,
                        GError **error);

g_mount_unmount_finish has been deprecated since version 2.22 and should not be used in newly-written code.

Use g_mount_unmount_with_operation_finish() instead.

Finishes unmounting a mount. If any errors occurred during the operation, error will be set to contain the errors and FALSE will be returned.

Parameters

mount	a GMount.
result	a GAsyncResult.
error	a GError location to store the error occurring, or `NULL` to ignore.

Returns

TRUE if the mount was successfully unmounted. FALSE otherwise.

g_mount_unmount_with_operation ()

void
g_mount_unmount_with_operation (GMount *mount,
                                GMountUnmountFlags flags,
                                GMountOperation *mount_operation,
                                GCancellable *cancellable,
                                GAsyncReadyCallback callback,
                                gpointer user_data);

Unmounts a mount. This is an asynchronous operation, and is finished by calling g_mount_unmount_with_operation_finish() with the mount and GAsyncResult data returned in the callback .

Parameters

mount	a GMount.
flags	flags affecting the operation
mount_operation	a GMountOperation or `NULL` to avoid user interaction.	[nullable]
cancellable	optional GCancellable object, `NULL` to ignore.	[nullable]
callback	a GAsyncReadyCallback, or `NULL`.	[nullable]
user_data	user data passed to `callback` .

Since: 2.22

g_mount_unmount_with_operation_finish ()

gboolean
g_mount_unmount_with_operation_finish (GMount *mount,
                                       GAsyncResult *result,
                                       GError **error);

Finishes unmounting a mount. If any errors occurred during the operation, error will be set to contain the errors and FALSE will be returned.

Parameters

mount	a GMount.
result	a GAsyncResult.
error	a GError location to store the error occurring, or `NULL` to ignore.

Returns

TRUE if the mount was successfully unmounted. FALSE otherwise.

Since: 2.22

g_mount_remount ()

void
g_mount_remount (GMount *mount,
                 GMountMountFlags flags,
                 GMountOperation *mount_operation,
                 GCancellable *cancellable,
                 GAsyncReadyCallback callback,
                 gpointer user_data);

Remounts a mount. This is an asynchronous operation, and is finished by calling g_mount_remount_finish() with the mount and GAsyncResults data returned in the callback .

Remounting is useful when some setting affecting the operation of the volume has been changed, as these may need a remount to take affect. While this is semantically equivalent with unmounting and then remounting not all backends might need to actually be unmounted.

Parameters

mount	a GMount.
flags	flags affecting the operation
mount_operation	a GMountOperation or `NULL` to avoid user interaction.	[nullable]
cancellable	optional GCancellable object, `NULL` to ignore.	[nullable]
callback	a GAsyncReadyCallback, or `NULL`.	[nullable]
user_data	user data passed to `callback` .

g_mount_remount_finish ()

gboolean
g_mount_remount_finish (GMount *mount,
                        GAsyncResult *result,
                        GError **error);

Finishes remounting a mount. If any errors occurred during the operation, error will be set to contain the errors and FALSE will be returned.

Parameters

mount	a GMount.
result	a GAsyncResult.
error	a GError location to store the error occurring, or `NULL` to ignore.

Returns

TRUE if the mount was successfully remounted. FALSE otherwise.

g_mount_can_eject ()

gboolean
g_mount_can_eject (GMount *mount);

Checks if mount can be ejected.

Parameters

mount

a GMount.

Returns

TRUE if the mount can be ejected.

g_mount_eject ()

void
g_mount_eject (GMount *mount,
               GMountUnmountFlags flags,
               GCancellable *cancellable,
               GAsyncReadyCallback callback,
               gpointer user_data);

g_mount_eject has been deprecated since version 2.22 and should not be used in newly-written code.

Use g_mount_eject_with_operation() instead.

Ejects a mount. This is an asynchronous operation, and is finished by calling g_mount_eject_finish() with the mount and GAsyncResult data returned in the callback .

Parameters

mount	a GMount.
flags	flags affecting the unmount if required for eject
cancellable	optional GCancellable object, `NULL` to ignore.	[nullable]
callback	a GAsyncReadyCallback, or `NULL`.	[nullable]
user_data	user data passed to `callback` .

g_mount_eject_finish ()

gboolean
g_mount_eject_finish (GMount *mount,
                      GAsyncResult *result,
                      GError **error);

g_mount_eject_finish has been deprecated since version 2.22 and should not be used in newly-written code.

Use g_mount_eject_with_operation_finish() instead.

Finishes ejecting a mount. If any errors occurred during the operation, error will be set to contain the errors and FALSE will be returned.

Parameters

mount	a GMount.
result	a GAsyncResult.
error	a GError location to store the error occurring, or `NULL` to ignore.

Returns

TRUE if the mount was successfully ejected. FALSE otherwise.

g_mount_eject_with_operation ()

void
g_mount_eject_with_operation (GMount *mount,
                              GMountUnmountFlags flags,
                              GMountOperation *mount_operation,
                              GCancellable *cancellable,
                              GAsyncReadyCallback callback,
                              gpointer user_data);

Ejects a mount. This is an asynchronous operation, and is finished by calling g_mount_eject_with_operation_finish() with the mount and GAsyncResult data returned in the callback .

Parameters

mount	a GMount.
flags	flags affecting the unmount if required for eject
mount_operation	a GMountOperation or `NULL` to avoid user interaction.	[nullable]
cancellable	optional GCancellable object, `NULL` to ignore.	[nullable]
callback	a GAsyncReadyCallback, or `NULL`.	[nullable]
user_data	user data passed to `callback` .

Since: 2.22

g_mount_eject_with_operation_finish ()

gboolean
g_mount_eject_with_operation_finish (GMount *mount,
                                     GAsyncResult *result,
                                     GError **error);

Finishes ejecting a mount. If any errors occurred during the operation, error will be set to contain the errors and FALSE will be returned.

Parameters

mount	a GMount.
result	a GAsyncResult.
error	a GError location to store the error occurring, or `NULL` to ignore.

Returns

TRUE if the mount was successfully ejected. FALSE otherwise.

Since: 2.22

g_mount_guess_content_type ()

void
g_mount_guess_content_type (GMount *mount,
                            gboolean force_rescan,
                            GCancellable *cancellable,
                            GAsyncReadyCallback callback,
                            gpointer user_data);

Tries to guess the type of content stored on mount . Returns one or more textual identifiers of well-known content types (typically prefixed with "x-content/"), e.g. x-content/image-dcf for camera memory cards. See the shared-mime-info specification for more on x-content types.

This is an asynchronous operation (see g_mount_guess_content_type_sync() for the synchronous version), and is finished by calling g_mount_guess_content_type_finish() with the mount and GAsyncResult data returned in the callback .

Parameters

mount	a GMount
force_rescan	Whether to force a rescan of the content. Otherwise a cached result will be used if available
cancellable	optional GCancellable object, `NULL` to ignore.	[nullable]
callback	a GAsyncReadyCallback
user_data	user data passed to `callback`

Since: 2.18

g_mount_guess_content_type_finish ()

gchar **
g_mount_guess_content_type_finish (GMount *mount,
                                   GAsyncResult *result,
                                   GError **error);

Finishes guessing content types of mount . If any errors occurred during the operation, error will be set to contain the errors and FALSE will be returned. In particular, you may get an G_IO_ERROR_NOT_SUPPORTED if the mount does not support content guessing.

Parameters

mount	a GMount
result	a GAsyncResult
error	a GError location to store the error occurring, or `NULL` to ignore

Returns

a NULL-terminated array of content types or NULL on error. Caller should free this array with g_strfreev() when done with it.

[transfer full][element-type utf8]

Since: 2.18

g_mount_guess_content_type_sync ()

gchar **
g_mount_guess_content_type_sync (GMount *mount,
                                 gboolean force_rescan,
                                 GCancellable *cancellable,
                                 GError **error);

This is an synchronous operation and as such may block doing IO; see g_mount_guess_content_type() for the asynchronous version.

Parameters

mount	a GMount
force_rescan	Whether to force a rescan of the content. Otherwise a cached result will be used if available
cancellable	optional GCancellable object, `NULL` to ignore.	[nullable]
error	a GError location to store the error occurring, or `NULL` to ignore

Returns

a NULL-terminated array of content types or NULL on error. Caller should free this array with g_strfreev() when done with it.

[transfer full][element-type utf8]

Since: 2.18

g_mount_is_shadowed ()

gboolean
g_mount_is_shadowed (GMount *mount);

Determines if mount is shadowed. Applications or libraries should avoid displaying mount in the user interface if it is shadowed.

A mount is said to be shadowed if there exists one or more user visible objects (currently GMount objects) with a root that is inside the root of mount .

One application of shadow mounts is when exposing a single file system that is used to address several logical volumes. In this situation, a GVolumeMonitor implementation would create two GVolume objects (for example, one for the camera functionality of the device and one for a SD card reader on the device) with activation URIs gphoto2://[usb:001,002]/store1/ and gphoto2://[usb:001,002]/store2/. When the underlying mount (with root gphoto2://[usb:001,002]/) is mounted, said GVolumeMonitor implementation would create two GMount objects (each with their root matching the corresponding volume activation root) that would shadow the original mount.

The proxy monitor in GVfs 2.26 and later, automatically creates and manage shadow mounts (and shadows the underlying mount) if the activation root on a GVolume is set.

Parameters

mount

A GMount.

Returns

TRUE if mount is shadowed.

Since: 2.20

g_mount_shadow ()

void
g_mount_shadow (GMount *mount);

Increments the shadow count on mount . Usually used by GVolumeMonitor implementations when creating a shadow mount for mount , see g_mount_is_shadowed() for more information. The caller will need to emit the “changed” signal on mount manually.

Parameters

mount

A GMount.

Since: 2.20

g_mount_unshadow ()

void
g_mount_unshadow (GMount *mount);

Decrements the shadow count on mount . Usually used by GVolumeMonitor implementations when destroying a shadow mount for mount , see g_mount_is_shadowed() for more information. The caller will need to emit the “changed” signal on mount manually.

Parameters

mount

A GMount.

Since: 2.20

g_mount_get_sort_key ()

const gchar *
g_mount_get_sort_key (GMount *mount);

Gets the sort key for mount , if any.

Parameters

mount

A GMount.

Returns

Sorting key for mount or NULL if no such key is available.

Since: 2.32

Types and Values

GMount

typedef struct _GMount GMount;

A handle to an object implementing the GMountIface interface.

struct GMountIface

struct GMountIface {
  GTypeInterface g_iface;

  /* signals */

  void        (* changed)                   (GMount              *mount);
  void        (* unmounted)                 (GMount              *mount);

  /* Virtual Table */

  GFile     * (* get_root)                  (GMount              *mount);
  char      * (* get_name)                  (GMount              *mount);
  GIcon     * (* get_icon)                  (GMount              *mount);
  char      * (* get_uuid)                  (GMount              *mount);
  GVolume   * (* get_volume)                (GMount              *mount);
  GDrive    * (* get_drive)                 (GMount              *mount);
  gboolean    (* can_unmount)               (GMount              *mount);
  gboolean    (* can_eject)                 (GMount              *mount);

  void        (* unmount)                   (GMount              *mount,
                                             GMountUnmountFlags   flags,
                                             GCancellable        *cancellable,
                                             GAsyncReadyCallback  callback,
                                             gpointer             user_data);
  gboolean    (* unmount_finish)            (GMount              *mount,
                                             GAsyncResult        *result,
                                             GError             **error);

  void        (* eject)                     (GMount              *mount,
                                             GMountUnmountFlags   flags,
                                             GCancellable        *cancellable,
                                             GAsyncReadyCallback  callback,
                                             gpointer             user_data);
  gboolean    (* eject_finish)              (GMount              *mount,
                                             GAsyncResult        *result,
                                             GError             **error);

  void        (* remount)                   (GMount              *mount,
                                             GMountMountFlags     flags,
                                             GMountOperation     *mount_operation,
                                             GCancellable        *cancellable,
                                             GAsyncReadyCallback  callback,
                                             gpointer             user_data);
  gboolean    (* remount_finish)            (GMount              *mount,
                                             GAsyncResult        *result,
                                             GError             **error);

  void        (* guess_content_type)        (GMount              *mount,
                                             gboolean             force_rescan,
                                             GCancellable        *cancellable,
                                             GAsyncReadyCallback  callback,
                                             gpointer             user_data);
  gchar    ** (* guess_content_type_finish) (GMount              *mount,
                                             GAsyncResult        *result,
                                             GError             **error);
  gchar    ** (* guess_content_type_sync)   (GMount              *mount,
                                             gboolean             force_rescan,
                                             GCancellable        *cancellable,
                                             GError             **error);

  /* Signal, not VFunc */
  void        (* pre_unmount)               (GMount              *mount);

  void        (* unmount_with_operation)    (GMount              *mount,
                                             GMountUnmountFlags   flags,
                                             GMountOperation     *mount_operation,
                                             GCancellable        *cancellable,
                                             GAsyncReadyCallback  callback,
                                             gpointer             user_data);
  gboolean    (* unmount_with_operation_finish) (GMount          *mount,
                                             GAsyncResult        *result,
                                             GError             **error);

  void        (* eject_with_operation)      (GMount              *mount,
                                             GMountUnmountFlags   flags,
                                             GMountOperation     *mount_operation,
                                             GCancellable        *cancellable,
                                             GAsyncReadyCallback  callback,
                                             gpointer             user_data);
  gboolean    (* eject_with_operation_finish) (GMount            *mount,
                                             GAsyncResult        *result,
                                             GError             **error);
  GFile     * (* get_default_location)      (GMount              *mount);

  const gchar * (* get_sort_key)            (GMount              *mount);
  GIcon       * (* get_symbolic_icon)       (GMount              *mount);
};

Interface for implementing operations for mounts.

Members

`changed` ()	Changed signal that is emitted when the mount's state has changed.
`unmounted` ()	The unmounted signal that is emitted when the GMount have been unmounted. If the recipient is holding references to the object they should release them so the object can be finalized.
`get_root` ()	Gets a GFile to the root directory of the GMount.
`get_name` ()	Gets a string containing the name of the GMount.
`get_icon` ()	Gets a GIcon for the GMount.
`get_uuid` ()	Gets the UUID for the GMount. The reference is typically based on the file system UUID for the mount in question and should be considered an opaque string. Returns `NULL` if there is no UUID available.
`get_volume` ()	Gets a GVolume the mount is located on. Returns `NULL` if the GMount is not associated with a GVolume.
`get_drive` ()	Gets a GDrive the volume of the mount is located on. Returns `NULL` if the GMount is not associated with a GDrive or a GVolume. This is convenience method for getting the GVolume and using that to get the GDrive.
`can_unmount` ()	Checks if a GMount can be unmounted.
`can_eject` ()	Checks if a GMount can be ejected.
`unmount` ()	Starts unmounting a GMount.
`unmount_finish` ()	Finishes an unmounting operation.
`eject` ()	Starts ejecting a GMount.
`eject_finish` ()	Finishes an eject operation.
`remount` ()	Starts remounting a GMount.
`remount_finish` ()	Finishes a remounting operation.
`guess_content_type` ()	Starts guessing the type of the content of a GMount. See `g_mount_guess_content_type()` for more information on content type guessing. This operation was added in 2.18.
`guess_content_type_finish` ()	Finishes a content type guessing operation. Added in 2.18.
`guess_content_type_sync` ()	Synchronous variant of `guess_content_type` . Added in 2.18
`pre_unmount` ()	The ::pre-unmount signal that is emitted when the GMount will soon be emitted. If the recipient is somehow holding the mount open by keeping an open file on it it should close the file.
`unmount_with_operation` ()	Starts unmounting a GMount using a GMountOperation. Since 2.22.
`unmount_with_operation_finish` ()	Finishes an unmounting operation using a GMountOperation. Since 2.22.
`eject_with_operation` ()	Starts ejecting a GMount using a GMountOperation. Since 2.22.
`eject_with_operation_finish` ()	Finishes an eject operation using a GMountOperation. Since 2.22.
`get_default_location` ()	Gets a GFile indication a start location that can be use as the entry point for this mount. Since 2.24.
`get_sort_key` ()	Gets a key used for sorting GMount instance or `NULL` if no such key exists. Since 2.32.
`get_symbolic_icon` ()	Gets a symbolic GIcon for the GMount. Since 2.34.

enum GMountMountFlags

Flags used when mounting a mount.

Members

G_MOUNT_MOUNT_NONE

No flags set.

enum GMountUnmountFlags

Flags used when an unmounting a mount.

Members

G_MOUNT_UNMOUNT_NONE	No flags set.
G_MOUNT_UNMOUNT_FORCE	Unmount even if there are outstanding file operations on the mount.

Signal Details

The `“changed”` signal

void
user_function (GMount  *mount,
               gpointer user_data)

Emitted when the mount has been changed.

Parameters

mount	the object on which the signal is emitted
user_data	user data set when the signal handler was connected.

Flags: Run Last

The `“pre-unmount”` signal

void
user_function (GMount  *mount,
               gpointer user_data)

This signal may be emitted when the GMount is about to be unmounted.

This signal depends on the backend and is only emitted if GIO was used to unmount.

Parameters

mount	the object on which the signal is emitted
user_data	user data set when the signal handler was connected.

Flags: Run Last

Since: 2.22

The `“unmounted”` signal

void
user_function (GMount  *mount,
               gpointer user_data)

This signal is emitted when the GMount have been unmounted. If the recipient is holding references to the object they should release them so the object can be finalized.

Parameters

mount	the object on which the signal is emitted
user_data	user data set when the signal handler was connected.

Flags: Run Last