GDrive: GIO Reference Manual

GDrive

GDrive — Drive management

Functions

char *	g_drive_get_name ()
GIcon *	g_drive_get_icon ()
GIcon *	g_drive_get_symbolic_icon ()
gboolean	g_drive_has_volumes ()
GList *	g_drive_get_volumes ()
gboolean	g_drive_can_eject ()
GDriveStartStopType	g_drive_get_start_stop_type ()
gboolean	g_drive_can_start ()
gboolean	g_drive_can_start_degraded ()
gboolean	g_drive_can_stop ()
gboolean	g_drive_can_poll_for_media ()
void	g_drive_poll_for_media ()
gboolean	g_drive_poll_for_media_finish ()
gboolean	g_drive_has_media ()
gboolean	g_drive_is_media_check_automatic ()
gboolean	g_drive_is_media_removable ()
void	g_drive_eject ()
gboolean	g_drive_eject_finish ()
void	g_drive_eject_with_operation ()
gboolean	g_drive_eject_with_operation_finish ()
void	g_drive_start ()
gboolean	g_drive_start_finish ()
void	g_drive_stop ()
gboolean	g_drive_stop_finish ()
char **	g_drive_enumerate_identifiers ()
char *	g_drive_get_identifier ()
const gchar *	g_drive_get_sort_key ()

Signals

void	changed	Run Last
void	disconnected	Run Last
void	eject-button	Run Last
void	stop-button	Run Last

Types and Values

	GDrive
struct	GDriveIface
enum	GDriveStartFlags
enum	GDriveStartStopType

Object Hierarchy

    GInterface
    ╰── GDrive

Prerequisites

GDrive requires GObject.

Includes

#include <gio/gio.h>

Description

GDrive - this represent a piece of hardware connected to the machine. It's generally only created for removable hardware or hardware with removable media.

GDrive is a container class for GVolume objects that stem from the same piece of media. As such, GDrive abstracts a drive with (or without) removable media and provides operations for querying whether media is available, determining whether media change is automatically detected and ejecting the media.

If the GDrive reports that media isn't automatically detected, one can poll for media; typically one should not do this periodically as a poll for media operation is potententially expensive and may spin up the drive creating noise.

GDrive supports starting and stopping drives with authentication support for the former. This can be used to support a diverse set of use cases including connecting/disconnecting iSCSI devices, powering down external disk enclosures and starting/stopping multi-disk devices such as RAID devices. Note that the actual semantics and side-effects of starting/stopping a GDrive may vary according to implementation. To choose the correct verbs in e.g. a file manager, use g_drive_get_start_stop_type().

For porting from GnomeVFS note that there is no equivalent of GDrive in that API.

Functions

g_drive_get_name ()

char *
g_drive_get_name (GDrive *drive);

Gets the name of drive .

Parameters

drive

a GDrive.

Returns

a string containing drive 's name. The returned string should be freed when no longer needed.

g_drive_get_icon ()

GIcon *
g_drive_get_icon (GDrive *drive);

Gets the icon for drive .

Parameters

drive

a GDrive.

Returns

GIcon for the drive . Free the returned object with g_object_unref().

[transfer full]

g_drive_get_symbolic_icon ()

GIcon *
g_drive_get_symbolic_icon (GDrive *drive);

Gets the icon for drive .

Parameters

drive

a GDrive.

Returns

symbolic GIcon for the drive . Free the returned object with g_object_unref().

[transfer full]

Since 2.34

g_drive_has_volumes ()

gboolean
g_drive_has_volumes (GDrive *drive);

Check if drive has any mountable volumes.

Parameters

drive

a GDrive.

Returns

TRUE if the drive contains volumes, FALSE otherwise.

g_drive_get_volumes ()

GList *
g_drive_get_volumes (GDrive *drive);

Get a list of mountable volumes for drive .

The returned list should be freed with g_list_free(), after its elements have been unreffed with g_object_unref().

Parameters

drive

a GDrive.

Returns

GList containing any GVolume objects on the given drive .

[element-type GVolume][transfer full]

g_drive_can_eject ()

gboolean
g_drive_can_eject (GDrive *drive);

Checks if a drive can be ejected.

Parameters

drive

a GDrive.

Returns

TRUE if the drive can be ejected, FALSE otherwise.

g_drive_get_start_stop_type ()

GDriveStartStopType
g_drive_get_start_stop_type (GDrive *drive);

Gets a hint about how a drive can be started/stopped.

Parameters

drive

a GDrive.

Returns

A value from the GDriveStartStopType enumeration.

Since 2.22

g_drive_can_start ()

gboolean
g_drive_can_start (GDrive *drive);

Checks if a drive can be started.

Parameters

drive

a GDrive.

Returns

TRUE if the drive can be started, FALSE otherwise.

Since 2.22

g_drive_can_start_degraded ()

gboolean
g_drive_can_start_degraded (GDrive *drive);

Checks if a drive can be started degraded.

Parameters

drive

a GDrive.

Returns

TRUE if the drive can be started degraded, FALSE otherwise.

Since 2.22

g_drive_can_stop ()

gboolean
g_drive_can_stop (GDrive *drive);

Checks if a drive can be stopped.

Parameters

drive

a GDrive.

Returns

TRUE if the drive can be stopped, FALSE otherwise.

Since 2.22

g_drive_can_poll_for_media ()

gboolean
g_drive_can_poll_for_media (GDrive *drive);

Checks if a drive can be polled for media changes.

Parameters

drive

a GDrive.

Returns

TRUE if the drive can be polled for media changes, FALSE otherwise.

g_drive_poll_for_media ()

void
g_drive_poll_for_media (GDrive *drive,
                        GCancellable *cancellable,
                        GAsyncReadyCallback callback,
                        gpointer user_data);

Asynchronously polls drive to see if media has been inserted or removed.

When the operation is finished, callback will be called. You can then call g_drive_poll_for_media_finish() to obtain the result of the operation.

Parameters

drive	a GDrive.
cancellable	optional GCancellable object, `NULL` to ignore.	[allow-none]
callback	a GAsyncReadyCallback, or `NULL`.	[allow-none]
user_data	user data to pass to `callback`

g_drive_poll_for_media_finish ()

gboolean
g_drive_poll_for_media_finish (GDrive *drive,
                               GAsyncResult *result,
                               GError **error);

Finishes an operation started with g_drive_poll_for_media() on a drive.

Parameters

drive	a GDrive.
result	a GAsyncResult.
error	a GError, or `NULL`

Returns

TRUE if the drive has been poll_for_mediaed successfully, FALSE otherwise.

g_drive_has_media ()

gboolean
g_drive_has_media (GDrive *drive);

Checks if the drive has media. Note that the OS may not be polling the drive for media changes; see g_drive_is_media_check_automatic() for more details.

Parameters

drive

a GDrive.

Returns

TRUE if drive has media, FALSE otherwise.

g_drive_is_media_check_automatic ()

gboolean
g_drive_is_media_check_automatic (GDrive *drive);

Checks if drive is capabable of automatically detecting media changes.

Parameters

drive

a GDrive.

Returns

TRUE if the drive is capabable of automatically detecting media changes, FALSE otherwise.

g_drive_is_media_removable ()

gboolean
g_drive_is_media_removable (GDrive *drive);

Checks if the drive supports removable media.

Parameters

drive

a GDrive.

Returns

TRUE if drive supports removable media, FALSE otherwise.

g_drive_eject ()

void
g_drive_eject (GDrive *drive,
               GMountUnmountFlags flags,
               GCancellable *cancellable,
               GAsyncReadyCallback callback,
               gpointer user_data);

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

Use g_drive_eject_with_operation() instead.

Asynchronously ejects a drive.

When the operation is finished, callback will be called. You can then call g_drive_eject_finish() to obtain the result of the operation.

Parameters

drive	a GDrive.
flags	flags affecting the unmount if required for eject
cancellable	optional GCancellable object, `NULL` to ignore.	[allow-none]
callback	a GAsyncReadyCallback, or `NULL`.	[allow-none]
user_data	user data to pass to `callback`

g_drive_eject_finish ()

gboolean
g_drive_eject_finish (GDrive *drive,
                      GAsyncResult *result,
                      GError **error);

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

Use g_drive_eject_with_operation_finish() instead.

Finishes ejecting a drive.

Parameters

drive	a GDrive.
result	a GAsyncResult.
error	a GError, or `NULL`

Returns

TRUE if the drive has been ejected successfully, FALSE otherwise.

g_drive_eject_with_operation ()

void
g_drive_eject_with_operation (GDrive *drive,
                              GMountUnmountFlags flags,
                              GMountOperation *mount_operation,
                              GCancellable *cancellable,
                              GAsyncReadyCallback callback,
                              gpointer user_data);

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

Parameters

drive	a GDrive.
flags	flags affecting the unmount if required for eject
mount_operation	a GMountOperation or `NULL` to avoid user interaction.	[allow-none]
cancellable	optional GCancellable object, `NULL` to ignore.	[allow-none]
callback	a GAsyncReadyCallback, or `NULL`.	[allow-none]
user_data	user data passed to `callback` .

Since 2.22

g_drive_eject_with_operation_finish ()

gboolean
g_drive_eject_with_operation_finish (GDrive *drive,
                                     GAsyncResult *result,
                                     GError **error);

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

Parameters

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

Returns

TRUE if the drive was successfully ejected. FALSE otherwise.

Since 2.22

g_drive_start ()

void
g_drive_start (GDrive *drive,
               GDriveStartFlags flags,
               GMountOperation *mount_operation,
               GCancellable *cancellable,
               GAsyncReadyCallback callback,
               gpointer user_data);

Asynchronously starts a drive.

When the operation is finished, callback will be called. You can then call g_drive_start_finish() to obtain the result of the operation.

Parameters

drive	a GDrive.
flags	flags affecting the start operation.
mount_operation	a GMountOperation or `NULL` to avoid user interaction.	[allow-none]
cancellable	optional GCancellable object, `NULL` to ignore.	[allow-none]
callback	a GAsyncReadyCallback, or `NULL`.	[allow-none]
user_data	user data to pass to `callback`

Since 2.22

g_drive_start_finish ()

gboolean
g_drive_start_finish (GDrive *drive,
                      GAsyncResult *result,
                      GError **error);

Finishes starting a drive.

Parameters

drive	a GDrive.
result	a GAsyncResult.
error	a GError, or `NULL`

Returns

TRUE if the drive has been started successfully, FALSE otherwise.

Since 2.22

g_drive_stop ()

void
g_drive_stop (GDrive *drive,
              GMountUnmountFlags flags,
              GMountOperation *mount_operation,
              GCancellable *cancellable,
              GAsyncReadyCallback callback,
              gpointer user_data);

Asynchronously stops a drive.

When the operation is finished, callback will be called. You can then call g_drive_stop_finish() to obtain the result of the operation.

Parameters

drive	a GDrive.
flags	flags affecting the unmount if required for stopping.
mount_operation	a GMountOperation or `NULL` to avoid user interaction.	[allow-none]
cancellable	optional GCancellable object, `NULL` to ignore.	[allow-none]
callback	a GAsyncReadyCallback, or `NULL`.	[allow-none]
user_data	user data to pass to `callback`

Since 2.22

g_drive_stop_finish ()

gboolean
g_drive_stop_finish (GDrive *drive,
                     GAsyncResult *result,
                     GError **error);

Finishes stopping a drive.

Parameters

drive	a GDrive.
result	a GAsyncResult.
error	a GError, or `NULL`

Returns

TRUE if the drive has been stopped successfully, FALSE otherwise.

Since 2.22

g_drive_enumerate_identifiers ()

char **
g_drive_enumerate_identifiers (GDrive *drive);

Gets the kinds of identifiers that drive has. Use g_drive_get_identifier() to obtain the identifiers themselves.

Parameters

drive

a GDrive

Returns

a NULL-terminated array of strings containing kinds of identifiers. Use g_strfreev() to free.

[transfer full][array zero-terminated=1]

g_drive_get_identifier ()

char *
g_drive_get_identifier (GDrive *drive,
                        const char *kind);

Gets the identifier of the given kind for drive .

Parameters

drive	a GDrive
kind	the kind of identifier to return

Returns

a newly allocated string containing the requested identfier, or NULL if the GDrive doesn't have this kind of identifier.

g_drive_get_sort_key ()

const gchar *
g_drive_get_sort_key (GDrive *drive);

Gets the sort key for drive , if any.

Parameters

drive

A GDrive.

Returns

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

Since 2.32

Types and Values

GDrive

typedef struct _GDrive GDrive;

Opaque drive object.

struct GDriveIface

struct GDriveIface {
  GTypeInterface g_iface;

  /* signals */
  void     (* changed)                  (GDrive              *drive);
  void     (* disconnected)             (GDrive              *drive);
  void     (* eject_button)             (GDrive              *drive);

  /* Virtual Table */
  char *   (* get_name)                 (GDrive              *drive);
  GIcon *  (* get_icon)                 (GDrive              *drive);
  gboolean (* has_volumes)              (GDrive              *drive);
  GList *  (* get_volumes)              (GDrive              *drive);
  gboolean (* is_media_removable)       (GDrive              *drive);
  gboolean (* has_media)                (GDrive              *drive);
  gboolean (* is_media_check_automatic) (GDrive              *drive);
  gboolean (* can_eject)                (GDrive              *drive);
  gboolean (* can_poll_for_media)       (GDrive              *drive);
  void     (* eject)                    (GDrive              *drive,
                                         GMountUnmountFlags   flags,
                                         GCancellable        *cancellable,
                                         GAsyncReadyCallback  callback,
                                         gpointer             user_data);
  gboolean (* eject_finish)             (GDrive              *drive,
                                         GAsyncResult        *result,
                                         GError             **error);
  void     (* poll_for_media)           (GDrive              *drive,
                                         GCancellable        *cancellable,
                                         GAsyncReadyCallback  callback,
                                         gpointer             user_data);
  gboolean (* poll_for_media_finish)    (GDrive              *drive,
                                         GAsyncResult        *result,
                                         GError             **error);

  char *   (* get_identifier)           (GDrive              *drive,
                                         const char          *kind);
  char **  (* enumerate_identifiers)    (GDrive              *drive);

  GDriveStartStopType (* get_start_stop_type) (GDrive        *drive);

  gboolean (* can_start)                (GDrive              *drive);
  gboolean (* can_start_degraded)       (GDrive              *drive);
  void     (* start)                    (GDrive              *drive,
                                         GDriveStartFlags     flags,
                                         GMountOperation     *mount_operation,
                                         GCancellable        *cancellable,
                                         GAsyncReadyCallback  callback,
                                         gpointer             user_data);
  gboolean (* start_finish)             (GDrive              *drive,
                                         GAsyncResult        *result,
                                         GError             **error);

  gboolean (* can_stop)                 (GDrive              *drive);
  void     (* stop)                     (GDrive              *drive,
                                         GMountUnmountFlags   flags,
                                         GMountOperation     *mount_operation,
                                         GCancellable        *cancellable,
                                         GAsyncReadyCallback  callback,
                                         gpointer             user_data);
  gboolean (* stop_finish)              (GDrive              *drive,
                                         GAsyncResult        *result,
                                         GError             **error);
  /* signal, not VFunc */
  void     (* stop_button)              (GDrive              *drive);

  void        (* eject_with_operation)      (GDrive              *drive,
                                             GMountUnmountFlags   flags,
                                             GMountOperation     *mount_operation,
                                             GCancellable        *cancellable,
                                             GAsyncReadyCallback  callback,
                                             gpointer             user_data);
  gboolean    (* eject_with_operation_finish) (GDrive            *drive,
                                             GAsyncResult        *result,
                                             GError             **error);

  const gchar * (* get_sort_key)        (GDrive              *drive);
  GIcon *       (* get_symbolic_icon)   (GDrive              *drive);
};

Interface for creating GDrive implementations.

Members

GTypeInterface `g_iface`;	The parent interface.
`changed` ()	Signal emitted when the drive is changed.
`disconnected` ()	The removed signal that is emitted when the GDrive have been disconnected. If the recipient is holding references to the object they should release them so the object can be finalized.
`eject_button` ()	Signal emitted when the physical eject button (if any) of a drive have been pressed.
`get_name` ()	Returns the name for the given GDrive.
`get_icon` ()	Returns a GIcon for the given GDrive.
`has_volumes` ()	Returns `TRUE` if the GDrive has mountable volumes.
`get_volumes` ()	Returns a list GList of GVolume for the GDrive.
`is_media_removable` ()	Returns `TRUE` if the GDrive supports removal and insertion of media.
`has_media` ()	Returns `TRUE` if the GDrive has media inserted.
`is_media_check_automatic` ()	Returns `TRUE` if the GDrive is capabable of automatically detecting media changes.
`can_eject` ()	Returns `TRUE` if the GDrive can eject media.
`can_poll_for_media` ()	Returns `TRUE` if the GDrive is capable of manually polling for media change.
`eject` ()	Ejects a GDrive.
`eject_finish` ()	Finishes an eject operation.
`poll_for_media` ()	Poll for media insertion/removal on a GDrive.
`poll_for_media_finish` ()	Finishes a media poll operation.
`get_identifier` ()	Returns the identifier of the given kind, or `NULL` if the GDrive doesn't have one.
`enumerate_identifiers` ()	Returns an array strings listing the kinds of identifiers which the GDrive has.
`get_start_stop_type` ()	Gets a GDriveStartStopType with details about starting/stopping the drive. Since 2.22.
`can_start` ()	Returns `TRUE` if a GDrive can be started. Since 2.22.
`can_start_degraded` ()	Returns `TRUE` if a GDrive can be started degraded. Since 2.22.
`start` ()	Starts a GDrive. Since 2.22.
`start_finish` ()	Finishes a start operation. Since 2.22.
`can_stop` ()	Returns `TRUE` if a GDrive can be stopped. Since 2.22.
`stop` ()	Stops a GDrive. Since 2.22.
`stop_finish` ()	Finishes a stop operation. Since 2.22.
`stop_button` ()	Signal emitted when the physical stop button (if any) of a drive have been pressed. Since 2.22.
`eject_with_operation` ()	Starts ejecting a GDrive using a GMountOperation. Since 2.22.
`eject_with_operation_finish` ()	Finishes an eject operation using a GMountOperation. Since 2.22.
`get_sort_key` ()	Gets a key used for sorting GDrive instances or `NULL` if no such key exists. Since 2.32.
`get_symbolic_icon` ()	Returns a symbolic GIcon for the given GDrive. Since 2.34.

enum GDriveStartFlags

Flags used when starting a drive.

Members

G_DRIVE_START_NONE

No flags set.

Since 2.22

enum GDriveStartStopType

Enumeration describing how a drive can be started/stopped.

Members

G_DRIVE_START_STOP_TYPE_UNKNOWN	Unknown or drive doesn't support start/stop.
G_DRIVE_START_STOP_TYPE_SHUTDOWN	The stop method will physically shut down the drive and e.g. power down the port the drive is attached to.
G_DRIVE_START_STOP_TYPE_NETWORK	The start/stop methods are used for connecting/disconnect to the drive over the network.
G_DRIVE_START_STOP_TYPE_MULTIDISK	The start/stop methods will assemble/disassemble a virtual drive from several physical drives.
G_DRIVE_START_STOP_TYPE_PASSWORD	The start/stop methods will unlock/lock the disk (for example using the ATA <quote>SECURITY UNLOCK DEVICE</quote> command)

Since 2.22

Signal Details

The `“changed”` signal

void
user_function (GDrive  *drive,
               gpointer user_data)

Emitted when the drive's state has changed.

Parameters

drive	a GDrive.
user_data	user data set when the signal handler was connected.

Flags: Run Last

The `“disconnected”` signal

void
user_function (GDrive  *drive,
               gpointer user_data)

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

Parameters

drive	a GDrive.
user_data	user data set when the signal handler was connected.

Flags: Run Last

The `“eject-button”` signal

void
user_function (GDrive  *drive,
               gpointer user_data)

Emitted when the physical eject button (if any) of a drive has been pressed.

Parameters

drive	a GDrive.
user_data	user data set when the signal handler was connected.

Flags: Run Last

The `“stop-button”` signal

void
user_function (GDrive  *drive,
               gpointer user_data)

Emitted when the physical stop button (if any) of a drive has been pressed.

Parameters

drive	a GDrive.
user_data	user data set when the signal handler was connected.

Flags: Run Last

Since 2.22