## UDisksFilesystem UDisksFilesystem — Generated C code for the org.freedesktop.UDisks2.Filesystem D-Bus interface |

## Synopsis

                        UDisksFilesystem;
    struct              UDisksFilesystemIface;
    GDBusInterfaceInfo * udisks_filesystem_interface_info   (void);
    guint               udisks_filesystem_override_properties
                                                            (GObjectClass *klass,
                                                             guint property_id_begin);
    void                udisks_filesystem_call_mount        (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);
    gboolean            udisks_filesystem_call_mount_finish (UDisksFilesystem *proxy,
                                                             gchar **out_mount_path,
                                                             GAsyncResult *res,
                                                             GError **error);
    gboolean            udisks_filesystem_call_mount_sync   (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             gchar **out_mount_path,
                                                             GCancellable *cancellable,
                                                             GError **error);
    void                udisks_filesystem_complete_mount    (UDisksFilesystem *object,
                                                             GDBusMethodInvocation *invocation,
                                                             const gchar *mount_path);
    void                udisks_filesystem_call_unmount      (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);
    gboolean            udisks_filesystem_call_unmount_finish
                                                            (UDisksFilesystem *proxy,
                                                             GAsyncResult *res,
                                                             GError **error);
    gboolean            udisks_filesystem_call_unmount_sync (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GError **error);
    void                udisks_filesystem_complete_unmount  (UDisksFilesystem *object,
                                                             GDBusMethodInvocation *invocation);
    void                udisks_filesystem_call_set_label    (UDisksFilesystem *proxy,
                                                             const gchar *arg_label,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);
    gboolean            udisks_filesystem_call_set_label_finish
                                                            (UDisksFilesystem *proxy,
                                                             GAsyncResult *res,
                                                             GError **error);
    gboolean            udisks_filesystem_call_set_label_sync
                                                            (UDisksFilesystem *proxy,
                                                             const gchar *arg_label,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GError **error);
    void                udisks_filesystem_complete_set_label
                                                            (UDisksFilesystem *object,
                                                             GDBusMethodInvocation *invocation);
    const gchar *const * udisks_filesystem_get_mount_points (UDisksFilesystem *object);
    gchar **            udisks_filesystem_dup_mount_points  (UDisksFilesystem *object);
    void                udisks_filesystem_set_mount_points  (UDisksFilesystem *object,
                                                             const gchar *const *value);
    struct              UDisksFilesystemProxy;
    struct              UDisksFilesystemProxyClass;
    void                udisks_filesystem_proxy_new         (GDBusConnection *connection,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);
    UDisksFilesystem *  udisks_filesystem_proxy_new_finish  (GAsyncResult *res,
                                                             GError **error);
    UDisksFilesystem *  udisks_filesystem_proxy_new_sync    (GDBusConnection *connection,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GError **error);
    void                udisks_filesystem_proxy_new_for_bus (GBusType bus_type,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);
    UDisksFilesystem *  udisks_filesystem_proxy_new_for_bus_finish
                                                            (GAsyncResult *res,
                                                             GError **error);
    UDisksFilesystem *  udisks_filesystem_proxy_new_for_bus_sync
                                                            (GBusType bus_type,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GError **error);
    struct              UDisksFilesystemSkeleton;
    struct              UDisksFilesystemSkeletonClass;
    UDisksFilesystem *  udisks_filesystem_skeleton_new      (void);

## Object Hierarchy

      GInterface
       +----UDisksFilesystem

      GObject
       +----GDBusProxy
             +----UDisksFilesystemProxy

      GObject
       +----GDBusInterfaceSkeleton
             +----UDisksFilesystemSkeleton
                   +----UDisksLinuxFilesystem

## Prerequisites

UDisksFilesystem requires GObject.

## Implemented Interfaces

UDisksFilesystemProxy implements GDBusInterface, GInitable, GAsyncInitable and UDisksFilesystem.

UDisksFilesystemSkeleton implements GDBusInterface and UDisksFilesystem.

## Known Implementations

UDisksFilesystem is implemented by UDisksFilesystemProxy, UDisksFilesystemSkeleton and UDisksLinuxFilesystem.

## Properties

      "mount-points"             GStrv                 : Read / Write

## Signals

      "handle-mount"                                   : Run Last
      "handle-set-label"                               : Run Last
      "handle-unmount"                                 : Run Last

## Description

This section contains code for working with the org.freedesktop.UDisks2.Filesystem D-Bus interface in C.

## Details

### UDisksFilesystem

    typedef struct _UDisksFilesystem UDisksFilesystem;

Abstract interface type for the D-Bus interface org.freedesktop.UDisks2.Filesystem.

### struct UDisksFilesystemIface

    struct UDisksFilesystemIface {
      GTypeInterface parent_iface;

      gboolean (*handle_mount) (
        UDisksFilesystem *object,
        GDBusMethodInvocation *invocation,
        GVariant *arg_options);

      gboolean (*handle_set_label) (
        UDisksFilesystem *object,
        GDBusMethodInvocation *invocation,
        const gchar *arg_label,
        GVariant *arg_options);

      gboolean (*handle_unmount) (
        UDisksFilesystem *object,
        GDBusMethodInvocation *invocation,
        GVariant *arg_options);

      const gchar *const * (*get_mount_points) (UDisksFilesystem *object);
    };

Virtual table for the D-Bus interface org.freedesktop.UDisks2.Filesystem.

GTypeInterface `parent_iface`; | The parent interface.
`handle_mount` () | Handler for the "handle-mount" signal.
`handle_set_label` () | Handler for the "handle-set-label" signal.
`handle_unmount` () | Handler for the "handle-unmount" signal.
`get_mount_points` () | Getter for the "mount-points" property.

### udisks_filesystem_interface_info ()

    GDBusInterfaceInfo * udisks_filesystem_interface_info   (void);

Gets a machine-readable description of the org.freedesktop.UDisks2.Filesystem D-Bus interface.

Returns : | A GDBusInterfaceInfo. Do not free. [transfer none]

### udisks_filesystem_override_properties ()

    guint               udisks_filesystem_override_properties
                                                            (GObjectClass *klass,
                                                             guint property_id_begin);

Overrides all GObject properties in the UDisksFilesystem interface for a concrete class. The properties are overridden in the order they are defined.

`klass` : | The class structure for a GObject-derived class.
`property_id_begin` : | The property id to assign to the first overridden property.
Returns : | The last property id.

### udisks_filesystem_call_mount ()

    void                udisks_filesystem_call_mount        (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);

Asynchronously invokes the `Mount()` D-Bus method on `proxy`. When the operation is finished, `callback` will be invoked in the thread-default main loop of the thread you are calling this method from. You can then call `udisks_filesystem_call_mount_finish()` to get the result of the operation.

See `udisks_filesystem_call_mount_sync()` for the synchronous, blocking version of this method.

`proxy` : | A UDisksFilesystemProxy.
`arg_options` : | Argument to pass with the method invocation.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`callback` : | A GAsyncReadyCallback to call when the request is satisfied or `NULL`.
`user_data` : | User data to pass to `callback`.

### udisks_filesystem_call_mount_finish ()

    gboolean            udisks_filesystem_call_mount_finish (UDisksFilesystem *proxy,
                                                             gchar **out_mount_path,
                                                             GAsyncResult *res,
                                                             GError **error);

Finishes an operation started with `udisks_filesystem_call_mount()`.

`proxy` : | A UDisksFilesystemProxy.
`out_mount_path` : | Return location for return parameter or `NULL` to ignore. [out]
`res` : | The GAsyncResult obtained from the GAsyncReadyCallback passed to `udisks_filesystem_call_mount()`.
`error` : | Return location for error or `NULL`.
Returns : | `TRUE` if the call succeded, `FALSE` if `error` is set. [skip]

### udisks_filesystem_call_mount_sync ()

    gboolean            udisks_filesystem_call_mount_sync   (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             gchar **out_mount_path,
                                                             GCancellable *cancellable,
                                                             GError **error);

Synchronously invokes the `Mount()` D-Bus method on `proxy`. The calling thread is blocked until a reply is received.

See `udisks_filesystem_call_mount()` for the asynchronous version of this method.

`proxy` : | A UDisksFilesystemProxy.
`arg_options` : | Argument to pass with the method invocation.
`out_mount_path` : | Return location for return parameter or `NULL` to ignore. [out]
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`error` : | Return location for error or `NULL`.
Returns : | `TRUE` if the call succeded, `FALSE` if `error` is set. [skip]

### udisks_filesystem_complete_mount ()

    void                udisks_filesystem_complete_mount    (UDisksFilesystem *object,
                                                             GDBusMethodInvocation *invocation,
                                                             const gchar *mount_path);

Helper function used in service implementations to finish handling invocations of the `Mount()` D-Bus method. If you instead want to finish handling an invocation by returning an error, use `g_dbus_method_invocation_return_error()` or similar.

This method will free `invocation`, you cannot use it afterwards.

`object` : | A UDisksFilesystem.
`invocation` : | A GDBusMethodInvocation. [transfer full]
`mount_path` : | Parameter to return.

### udisks_filesystem_call_unmount ()

    void                udisks_filesystem_call_unmount      (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);

Asynchronously invokes the `Unmount()` D-Bus method on `proxy`. When the operation is finished, `callback` will be invoked in the thread-default main loop of the thread you are calling this method from. You can then call `udisks_filesystem_call_unmount_finish()` to get the result of the operation.

See `udisks_filesystem_call_unmount_sync()` for the synchronous, blocking version of this method.

`proxy` : | A UDisksFilesystemProxy.
`arg_options` : | Argument to pass with the method invocation.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`callback` : | A GAsyncReadyCallback to call when the request is satisfied or `NULL`.
`user_data` : | User data to pass to `callback`.

### udisks_filesystem_call_unmount_finish ()

    gboolean            udisks_filesystem_call_unmount_finish
                                                            (UDisksFilesystem *proxy,
                                                             GAsyncResult *res,
                                                             GError **error);

Finishes an operation started with `udisks_filesystem_call_unmount()`.

`proxy` : | A UDisksFilesystemProxy.
`res` : | The GAsyncResult obtained from the GAsyncReadyCallback passed to `udisks_filesystem_call_unmount()`.
`error` : | Return location for error or `NULL`.
Returns : | `TRUE` if the call succeded, `FALSE` if `error` is set. [skip]

### udisks_filesystem_call_unmount_sync ()

    gboolean            udisks_filesystem_call_unmount_sync (UDisksFilesystem *proxy,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GError **error);

Synchronously invokes the `Unmount()` D-Bus method on `proxy`. The calling thread is blocked until a reply is received.

See `udisks_filesystem_call_unmount()` for the asynchronous version of this method.

`proxy` : | A UDisksFilesystemProxy.
`arg_options` : | Argument to pass with the method invocation.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`error` : | Return location for error or `NULL`.
Returns : | `TRUE` if the call succeded, `FALSE` if `error` is set. [skip]

### udisks_filesystem_complete_unmount ()

    void                udisks_filesystem_complete_unmount  (UDisksFilesystem *object,
                                                             GDBusMethodInvocation *invocation);

Helper function used in service implementations to finish handling invocations of the `Unmount()` D-Bus method. If you instead want to finish handling an invocation by returning an error, use `g_dbus_method_invocation_return_error()` or similar.

This method will free `invocation`, you cannot use it afterwards.

`object` : | A UDisksFilesystem.
`invocation` : | A GDBusMethodInvocation. [transfer full]

### udisks_filesystem_call_set_label ()

    void                udisks_filesystem_call_set_label    (UDisksFilesystem *proxy,
                                                             const gchar *arg_label,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);

Asynchronously invokes the `SetLabel()` D-Bus method on `proxy`. When the operation is finished, `callback` will be invoked in the thread-default main loop of the thread you are calling this method from. You can then call `udisks_filesystem_call_set_label_finish()` to get the result of the operation.

See `udisks_filesystem_call_set_label_sync()` for the synchronous, blocking version of this method.

`proxy` : | A UDisksFilesystemProxy.
`arg_label` : | Argument to pass with the method invocation.
`arg_options` : | Argument to pass with the method invocation.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`callback` : | A GAsyncReadyCallback to call when the request is satisfied or `NULL`.
`user_data` : | User data to pass to `callback`.

### udisks_filesystem_call_set_label_finish ()

    gboolean            udisks_filesystem_call_set_label_finish
                                                            (UDisksFilesystem *proxy,
                                                             GAsyncResult *res,
                                                             GError **error);

Finishes an operation started with `udisks_filesystem_call_set_label()`.

`proxy` : | A UDisksFilesystemProxy.
`res` : | The GAsyncResult obtained from the GAsyncReadyCallback passed to `udisks_filesystem_call_set_label()`.
`error` : | Return location for error or `NULL`.
Returns : | `TRUE` if the call succeded, `FALSE` if `error` is set. [skip]

### udisks_filesystem_call_set_label_sync ()

    gboolean            udisks_filesystem_call_set_label_sync
                                                            (UDisksFilesystem *proxy,
                                                             const gchar *arg_label,
                                                             GVariant *arg_options,
                                                             GCancellable *cancellable,
                                                             GError **error);

Synchronously invokes the `SetLabel()` D-Bus method on `proxy`. The calling thread is blocked until a reply is received.

See `udisks_filesystem_call_set_label()` for the asynchronous version of this method.

`proxy` : | A UDisksFilesystemProxy.
`arg_label` : | Argument to pass with the method invocation.
`arg_options` : | Argument to pass with the method invocation.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`error` : | Return location for error or `NULL`.
Returns : | `TRUE` if the call succeded, `FALSE` if `error` is set. [skip]

### udisks_filesystem_complete_set_label ()

    void                udisks_filesystem_complete_set_label
                                                            (UDisksFilesystem *object,
                                                             GDBusMethodInvocation *invocation);

Helper function used in service implementations to finish handling invocations of the `SetLabel()` D-Bus method. If you instead want to finish handling an invocation by returning an error, use `g_dbus_method_invocation_return_error()` or similar.

This method will free `invocation`, you cannot use it afterwards.

`object` : | A UDisksFilesystem.
`invocation` : | A GDBusMethodInvocation. [transfer full]

### udisks_filesystem_get_mount_points ()

    const gchar *const * udisks_filesystem_get_mount_points (UDisksFilesystem *object);

Gets the value of the "MountPoints" D-Bus property.

Since this D-Bus property is readable, it is meaningful to use this function on both the client- and service-side.

### Warning

The returned value is only valid until the property changes so on the client-side it is only safe to use this function on the thread where `object` was constructed. Use `udisks_filesystem_dup_mount_points()` if on another thread.

`object` : | A UDisksFilesystem.
Returns : | The property value or `NULL` if the property is not set. Do not free the returned value, it belongs to `object`. [transfer none]

### udisks_filesystem_dup_mount_points ()

    gchar **            udisks_filesystem_dup_mount_points  (UDisksFilesystem *object);

Gets a copy of the "MountPoints" D-Bus property.

Since this D-Bus property is readable, it is meaningful to use this function on both the client- and service-side.

`object` : | A UDisksFilesystem.
Returns : | The property value or `NULL` if the property is not set. The returned value should be freed with `g_strfreev()`. [transfer full]

### udisks_filesystem_set_mount_points ()

    void                udisks_filesystem_set_mount_points  (UDisksFilesystem *object,
                                                             const gchar *const *value);

Sets the "MountPoints" D-Bus property to `value`.

Since this D-Bus property is not writable, it is only meaningful to use this function on the service-side.

`object` : | A UDisksFilesystem.
`value` : | The value to set.

### struct UDisksFilesystemProxy

    struct UDisksFilesystemProxy;

The UDisksFilesystemProxy structure contains only private data and should only be accessed using the provided API.

### struct UDisksFilesystemProxyClass

    struct UDisksFilesystemProxyClass {
      GDBusProxyClass parent_class;
    };

Class structure for UDisksFilesystemProxy.

GDBusProxyClass `parent_class`; | The parent class.

### udisks_filesystem_proxy_new ()

    void                udisks_filesystem_proxy_new         (GDBusConnection *connection,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);

Asynchronously creates a proxy for the D-Bus interface org.freedesktop.UDisks2.Filesystem. See `g_dbus_proxy_new()` for more details.

When the operation is finished, `callback` will be invoked in the thread-default main loop of the thread you are calling this method from. You can then call `udisks_filesystem_proxy_new_finish()` to get the result of the operation.

See `udisks_filesystem_proxy_new_sync()` for the synchronous, blocking version of this constructor.

`connection` : | A GDBusConnection.
`flags` : | Flags from the GDBusProxyFlags enumeration.
`name` : | A bus name (well-known or unique) or `NULL` if `connection` is not a message bus connection. [allow-none]
`object_path` : | An object path.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`callback` : | A GAsyncReadyCallback to call when the request is satisfied.
`user_data` : | User data to pass to `callback`.

### udisks_filesystem_proxy_new_finish ()

    UDisksFilesystem *  udisks_filesystem_proxy_new_finish  (GAsyncResult *res,
                                                             GError **error);

Finishes an operation started with `udisks_filesystem_proxy_new()`.

`res` : | The GAsyncResult obtained from the GAsyncReadyCallback passed to `udisks_filesystem_proxy_new()`.
`error` : | Return location for error or `NULL`
Returns : | The constructed proxy object or `NULL` if `error` is set. [transfer full][type UDisksFilesystemProxy]

### udisks_filesystem_proxy_new_sync ()

    UDisksFilesystem *  udisks_filesystem_proxy_new_sync    (GDBusConnection *connection,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GError **error);

Synchronously creates a proxy for the D-Bus interface org.freedesktop.UDisks2.Filesystem. See `g_dbus_proxy_new_sync()` for more details.

The calling thread is blocked until a reply is received.

See `udisks_filesystem_proxy_new()` for the asynchronous version of this constructor.

`connection` : | A GDBusConnection.
`flags` : | Flags from the GDBusProxyFlags enumeration.
`name` : | A bus name (well-known or unique) or `NULL` if `connection` is not a message bus connection. [allow-none]
`object_path` : | An object path.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`error` : | Return location for error or `NULL`
Returns : | The constructed proxy object or `NULL` if `error` is set. [transfer full][type UDisksFilesystemProxy]

### udisks_filesystem_proxy_new_for_bus ()

    void                udisks_filesystem_proxy_new_for_bus (GBusType bus_type,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GAsyncReadyCallback callback,
                                                             gpointer user_data);

Like `udisks_filesystem_proxy_new()` but takes a GBusType instead of a GDBusConnection.

When the operation is finished, `callback` will be invoked in the thread-default main loop of the thread you are calling this method from. You can then call `udisks_filesystem_proxy_new_for_bus_finish()` to get the result of the operation.

See `udisks_filesystem_proxy_new_for_bus_sync()` for the synchronous, blocking version of this constructor.

`bus_type` : | A GBusType.
`flags` : | Flags from the GDBusProxyFlags enumeration.
`name` : | A bus name (well-known or unique).
`object_path` : | An object path.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`callback` : | A GAsyncReadyCallback to call when the request is satisfied.
`user_data` : | User data to pass to `callback`.

### udisks_filesystem_proxy_new_for_bus_finish ()

    UDisksFilesystem *  udisks_filesystem_proxy_new_for_bus_finish
                                                            (GAsyncResult *res,
                                                             GError **error);

Finishes an operation started with `udisks_filesystem_proxy_new_for_bus()`.

`res` : | The GAsyncResult obtained from the GAsyncReadyCallback passed to `udisks_filesystem_proxy_new_for_bus()`.
`error` : | Return location for error or `NULL`
Returns : | The constructed proxy object or `NULL` if `error` is set. [transfer full][type UDisksFilesystemProxy]

### udisks_filesystem_proxy_new_for_bus_sync ()

    UDisksFilesystem *  udisks_filesystem_proxy_new_for_bus_sync
                                                            (GBusType bus_type,
                                                             GDBusProxyFlags flags,
                                                             const gchar *name,
                                                             const gchar *object_path,
                                                             GCancellable *cancellable,
                                                             GError **error);

Like `udisks_filesystem_proxy_new_sync()` but takes a GBusType instead of a GDBusConnection.

The calling thread is blocked until a reply is received.

See `udisks_filesystem_proxy_new_for_bus()` for the asynchronous version of this constructor.

`bus_type` : | A GBusType.
`flags` : | Flags from the GDBusProxyFlags enumeration.
`name` : | A bus name (well-known or unique).
`object_path` : | An object path.
`cancellable` : | A GCancellable or `NULL`. [allow-none]
`error` : | Return location for error or `NULL`
Returns : | The constructed proxy object or `NULL` if `error` is set. [transfer full][type UDisksFilesystemProxy]

### struct UDisksFilesystemSkeleton

    struct UDisksFilesystemSkeleton;

The UDisksFilesystemSkeleton structure contains only private data and should only be accessed using the provided API.

### struct UDisksFilesystemSkeletonClass

    struct UDisksFilesystemSkeletonClass {
      GDBusInterfaceSkeletonClass parent_class;
    };

Class structure for UDisksFilesystemSkeleton.

GDBusInterfaceSkeletonClass `parent_class`; | The parent class.

### udisks_filesystem_skeleton_new ()

    UDisksFilesystem *  udisks_filesystem_skeleton_new      (void);

Creates a skeleton object for the D-Bus interface org.freedesktop.UDisks2.Filesystem.

Returns : | The skeleton object. [transfer full][type UDisksFilesystemSkeleton]

## Property Details

### The `"mount-points"` property

      "mount-points"             GStrv                 : Read / Write

Represents the D-Bus property "MountPoints".

Since the D-Bus property for this GObject property is readable but not writable, it is meaningful to read from it on both the client- and service-side. It is only meaningful, however, to write to it on the service-side.

## Signal Details

### The `"handle-mount"` signal

    gboolean            user_function                      (UDisksFilesystem      *object,
                                                            GDBusMethodInvocation *invocation,
                                                            GVariant              *arg_options,
                                                            gpointer               user_data)        : Run Last

Signal emitted when a remote caller is invoking the `Mount()` D-Bus method.

If a signal handler returns `TRUE`, it means the signal handler will handle the invocation (e.g. take a reference to `invocation` and eventually call `udisks_filesystem_complete_mount()` or e.g. `g_dbus_method_invocation_return_error()` on it) and no order signal handlers will run. If no signal handler handles the invocation, the `G_DBUS_ERROR_UNKNOWN_METHOD` error is returned.

`object` : | A UDisksFilesystem.
`invocation` : | A GDBusMethodInvocation.
`arg_options` : | Argument passed by remote caller.
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` if the invocation was handled, `FALSE` to let other signal handlers run.

### The `"handle-set-label"` signal

    gboolean            user_function                      (UDisksFilesystem      *object,
                                                            GDBusMethodInvocation *invocation,
                                                            gchar                 *arg_label,
                                                            GVariant              *arg_options,
                                                            gpointer               user_data)        : Run Last

Signal emitted when a remote caller is invoking the `SetLabel()` D-Bus method.

If a signal handler returns `TRUE`, it means the signal handler will handle the invocation (e.g. take a reference to `invocation` and eventually call `udisks_filesystem_complete_set_label()` or e.g. `g_dbus_method_invocation_return_error()` on it) and no order signal handlers will run. If no signal handler handles the invocation, the `G_DBUS_ERROR_UNKNOWN_METHOD` error is returned.

`object` : | A UDisksFilesystem.
`invocation` : | A GDBusMethodInvocation.
`arg_label` : | Argument passed by remote caller.
`arg_options` : | Argument passed by remote caller.
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` if the invocation was handled, `FALSE` to let other signal handlers run.

### The `"handle-unmount"` signal

    gboolean            user_function                      (UDisksFilesystem      *object,
                                                            GDBusMethodInvocation *invocation,
                                                            GVariant              *arg_options,
                                                            gpointer               user_data)        : Run Last

Signal emitted when a remote caller is invoking the `Unmount()` D-Bus method.

If a signal handler returns `TRUE`, it means the signal handler will handle the invocation (e.g. take a reference to `invocation` and eventually call `udisks_filesystem_complete_unmount()` or e.g. `g_dbus_method_invocation_return_error()` on it) and no order signal handlers will run. If no signal handler handles the invocation, the `G_DBUS_ERROR_UNKNOWN_METHOD` error is returned.

`object` : | A UDisksFilesystem.
`invocation` : | A GDBusMethodInvocation.
`arg_options` : | Argument passed by remote caller.
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` if the invocation was handled, `FALSE` to let other signal handlers run.