GMount

GMount — Mount management

Synopsis


#include <gio/gio.h
@see also: GVolume>
#include <GUnixMount>

                    GMount;
                    GMountIface;
char *              g_mount_get_name                    (GMount *mount);
char *              g_mount_get_uuid                    (GMount *mount);
GIcon *             g_mount_get_icon                    (GMount *mount);
GDrive *            g_mount_get_drive                   (GMount *mount);
GFile *             g_mount_get_root                    (GMount *mount);
GVolume *           g_mount_get_volume                  (GMount *mount);
gboolean            g_mount_can_unmount                 (GMount *mount);
enum                GMountMountFlags;
enum                GMountUnmountFlags;
void                g_mount_unmount                     (GMount *mount,
                                                         GMountUnmountFlags flags,
                                                         GCancellable *cancellable,
                                                         GAsyncReadyCallback callback,
                                                         gpointer user_data);
gboolean            g_mount_unmount_finish              (GMount *mount,
                                                         GAsyncResult *result,
                                                         GError **error);
void                g_mount_remount                     (GMount *mount,
                                                         GMountMountFlags flags,
                                                         GMountOperation *mount_operation,
                                                         GCancellable *cancellable,
                                                         GAsyncReadyCallback callback,
                                                         gpointer user_data);
gboolean            g_mount_remount_finish              (GMount *mount,
                                                         GAsyncResult *result,
                                                         GError **error);
gboolean            g_mount_can_eject                   (GMount *mount);
void                g_mount_eject                       (GMount *mount,
                                                         GMountUnmountFlags flags,
                                                         GCancellable *cancellable,
                                                         GAsyncReadyCallback callback,
                                                         gpointer user_data);
gboolean            g_mount_eject_finish                (GMount *mount,
                                                         GAsyncResult *result,
                                                         GError **error);
void                g_mount_guess_content_type          (GMount *mount,
                                                         gboolean force_rescan,
                                                         GCancellable *cancellable,
                                                         GAsyncReadyCallback callback,
                                                         gpointer user_data);
gchar **            g_mount_guess_content_type_finish   (GMount *mount,
                                                         GAsyncResult *result,
                                                         GError **error);
gchar **            g_mount_guess_content_type_sync     (GMount *mount,
                                                         gboolean force_rescan,
                                                         GCancellable *cancellable,
                                                         GError **error);
gboolean            g_mount_is_shadowed                 (GMount *mount);
void                g_mount_shadow                      (GMount *mount);
void                g_mount_unshadow                    (GMount *mount);

Object Hierarchy

  GInterface
   +----GMount

Prerequisites

GMount requires GObject.

Signals

  "changed"                                        : Run Last
  "unmounted"                                      : Run Last

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 GAsyncReady and GSimpleAsyncReady. To unmount a GMount instance, first call g_mount_unmount() 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 GAsyncReady structure will be passed to the callback. That callback should then call g_mount_unmount_finish() with the GMount and the GAsyncReady data to see if the operation was completed successfully. If an error is present when g_mount_unmount_finish() is called, then it will be filled with any error information.

Details

GMount

typedef struct _GMount GMount;

A handle to an object implementing the GMountIface interface.

GMountIface

typedef struct {
  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);
} GMountIface;

Interface for implementing operations for mounts.

GTypeInterface g_iface;

 The parent interface.

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 contenet type guessing operation. Added in 2.18.

guess_content_type_sync ()

 Synchronous variant of guess_content_type. Added in 2.18

g_mount_get_name ()

char *              g_mount_get_name                    (GMount *mount);

Gets the name of mount.

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.

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.

mount :

 a GMount.

Returns :

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

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.

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.

g_mount_get_root ()

GFile *             g_mount_get_root                    (GMount *mount);

Gets the root directory on mount.

mount :

 a GMount.

Returns :

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

g_mount_get_volume ()

GVolume *           g_mount_get_volume                  (GMount *mount);

Gets the volume for the mount.

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.

g_mount_can_unmount ()

gboolean            g_mount_can_unmount                 (GMount *mount);

Checks if mount can be mounted.

mount :

 a GMount.

Returns :

 TRUE if the mount can be unmounted.

enum GMountMountFlags

typedef enum {
  G_MOUNT_MOUNT_NONE = 0
} GMountMountFlags;

Flags used when mounting a mount.

G_MOUNT_MOUNT_NONE

 No flags set.

enum GMountUnmountFlags

typedef enum {
  G_MOUNT_UNMOUNT_NONE  = 0,
  G_MOUNT_UNMOUNT_FORCE = (1 << 0)
} GMountUnmountFlags;

Flags used when an unmounting a mount.

G_MOUNT_UNMOUNT_NONE

 No flags set.

G_MOUNT_UNMOUNT_FORCE

 Unmount even if there are outstanding file operations on the mount.

g_mount_unmount ()

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

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.

mount :

 a GMount.

flags :

 flags affecting the operation

cancellable :

 optional GCancellable object, NULL to ignore.

callback :

 a GAsyncReadyCallback, or NULL.

user_data :

 user data passed to callback.

g_mount_unmount_finish ()

gboolean            g_mount_unmount_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.

mount :

 a GMount.

result :

 a GAsyncResult.

error :

 a GError location to store the error occuring, or NULL to ignore.

Returns :

 TRUE if the mount was successfully unmounted. FALSE otherwise.

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.

mount :

 a GMount.

flags :

 flags affecting the operation

mount_operation :

 a GMountOperation or NULL to avoid user interaction.

cancellable :

 optional GCancellable object, NULL to ignore.

callback :

 a GAsyncReadyCallback, or NULL.

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.

mount :

 a GMount.

result :

 a GAsyncResult.

error :

 a GError location to store the error occuring, 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 eject.

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);

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.

mount :

 a GMount.

flags :

 flags affecting the unmount if required for eject

cancellable :

 optional GCancellable object, NULL to ignore.

callback :

 a GAsyncReadyCallback, or NULL.

user_data :

 user data passed to callback.

g_mount_eject_finish ()

gboolean            g_mount_eject_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.

mount :

 a GMount.

result :

 a GAsyncResult.

error :

 a GError location to store the error occuring, or NULL to ignore.

Returns :

 TRUE if the mount was successfully ejected. FALSE otherwise.

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.

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

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 occured 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.

mount :

 a GMount

result :

 a GAsyncResult

error :

 a GError location to store the error occuring, 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.

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);

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

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

error :

 a GError location to store the error occuring, 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.

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.

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.

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.

mount :

 A GMount.

Since 2.20

Signal Details

The "changed" signal

void                user_function                      (GMount  *mount,
                                                        gpointer user_data)      : Run Last

Emitted when the mount has been changed.

mount :

 the object on which the signal is emitted

user_data :

 user data set when the signal handler was connected.

The "unmounted" signal

void                user_function                      (GMount  *mount,
                                                        gpointer user_data)      : Run Last

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.

mount :

 the object on which the signal is emitted

user_data :

 user data set when the signal handler was connected.
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