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This is the subclass of #GSocketConnection that is created for UNIX domain sockets.

It contains functions to do some of the UNIX socket specific functionality like passing file descriptors.

Since GLib 2.72, #GUnixConnection is available on all platforms. It requires underlying system support (such as Windows 10 with AF_UNIX) at run time.

Before GLib 2.72, <gio/gunixconnection.h> belonged to the UNIX-specific GIO interfaces, thus you had to use the gio-unix-2.0.pc pkg-config file when using it. This is no longer necessary since GLib 2.72.

Hierarchy

Index

Constructors

Properties

closed: boolean
g_type_instance: TypeInstance
input_stream: Gio.InputStream
output_stream: Gio.OutputStream
parent_instance: SocketConnection
socket: Gio.Socket
name: string

Methods

  • Creates a binding between source_property on source and target_property on target.

    Whenever the source_property is changed the target_property is updated using the same value. For instance:

      g_object_bind_property (action, "active", widget, "sensitive", 0);
    

    Will result in the "sensitive" property of the widget #GObject instance to be updated with the same value of the "active" property of the action #GObject instance.

    If flags contains %G_BINDING_BIDIRECTIONAL then the binding will be mutual: if target_property on target changes then the source_property on source will be updated as well.

    The binding will automatically be removed when either the source or the target instances are finalized. To remove the binding without affecting the source and the target you can just call g_object_unref() on the returned #GBinding instance.

    Removing the binding by calling g_object_unref() on it must only be done if the binding, source and target are only used from a single thread and it is clear that both source and target outlive the binding. Especially it is not safe to rely on this if the binding, source or target can be finalized from different threads. Keep another reference to the binding and use g_binding_unbind() instead to be on the safe side.

    A #GObject can have multiple bindings.

    Parameters

    • source_property: string

      the property on source to bind

    • target: GObject.Object

      the target #GObject

    • target_property: string

      the property on target to bind

    • flags: BindingFlags

      flags to pass to #GBinding

    Returns Binding

  • Creates a binding between source_property on source and target_property on target, allowing you to set the transformation functions to be used by the binding.

    This function is the language bindings friendly version of g_object_bind_property_full(), using #GClosures instead of function pointers.

    Parameters

    • source_property: string

      the property on source to bind

    • target: GObject.Object

      the target #GObject

    • target_property: string

      the property on target to bind

    • flags: BindingFlags

      flags to pass to #GBinding

    • transform_to: TClosure<any, any>

      a #GClosure wrapping the transformation function from the source to the target, or %NULL to use the default

    • transform_from: TClosure<any, any>

      a #GClosure wrapping the transformation function from the target to the source, or %NULL to use the default

    Returns Binding

  • clear_pending(): void
  • Closes the stream, releasing resources related to it. This will also close the individual input and output streams, if they are not already closed.

    Once the stream is closed, all other operations will return %G_IO_ERROR_CLOSED. Closing a stream multiple times will not return an error.

    Closing a stream will automatically flush any outstanding buffers in the stream.

    Streams will be automatically closed when the last reference is dropped, but you might want to call this function to make sure resources are released as early as possible.

    Some streams might keep the backing store of the stream (e.g. a file descriptor) open after the stream is closed. See the documentation for the individual stream for details.

    On failure the first error that happened will be reported, but the close operation will finish as much as possible. A stream that failed to close will still return %G_IO_ERROR_CLOSED for all operations. Still, it is important to check and report the error to the user, otherwise there might be a loss of data as all data might not be written.

    If cancellable is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error %G_IO_ERROR_CANCELLED will be returned. Cancelling a close will still leave the stream closed, but some streams can use a faster close that doesn't block to e.g. check errors.

    The default implementation of this method just calls close on the individual input/output streams.

    Parameters

    • cancellable: Gio.Cancellable

      optional #GCancellable object, %NULL to ignore

    Returns boolean

  • Requests an asynchronous close of the stream, releasing resources related to it. When the operation is finished callback will be called. You can then call g_io_stream_close_finish() to get the result of the operation.

    For behaviour details see g_io_stream_close().

    The asynchronous methods have a default fallback that uses threads to implement asynchronicity, so they are optional for inheriting classes. However, if you override one you must override all.

    Parameters

    • io_priority: number

      the io priority of the request

    • cancellable: Gio.Cancellable

      optional cancellable object

    • callback: AsyncReadyCallback

      callback to call when the request is satisfied

    Returns void

  • connect(sigName: "notify::socket", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect(sigName: "notify::closed", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect(sigName: "notify::input-stream", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect(sigName: "notify::output-stream", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect(sigName: string, callback: ((...args: any[]) => void)): number
  • connect_after(sigName: "notify::socket", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect_after(sigName: "notify::closed", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect_after(sigName: "notify::input-stream", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect_after(sigName: "notify::output-stream", callback: (($obj: UnixConnection, pspec: ParamSpec) => void)): number
  • connect_after(sigName: string, callback: ((...args: any[]) => void)): number
  • Asynchronously connect connection to the specified remote address.

    This clears the #GSocket:blocking flag on connection's underlying socket if it is currently set.

    Use g_socket_connection_connect_finish() to retrieve the result.

    Parameters

    Returns void

  • disconnect(id: number): void
  • emit(sigName: "notify::socket", ...args: any[]): void
  • emit(sigName: "notify::closed", ...args: any[]): void
  • emit(sigName: "notify::input-stream", ...args: any[]): void
  • emit(sigName: "notify::output-stream", ...args: any[]): void
  • emit(sigName: string, ...args: any[]): void
  • force_floating(): void
  • This function is intended for #GObject implementations to re-enforce a [floating][floating-ref] object reference. Doing this is seldom required: all #GInitiallyUnowneds are created with a floating reference which usually just needs to be sunken by calling g_object_ref_sink().

    Returns void

  • freeze_notify(): void
  • Increases the freeze count on object. If the freeze count is non-zero, the emission of "notify" signals on object is stopped. The signals are queued until the freeze count is decreased to zero. Duplicate notifications are squashed so that at most one #GObject::notify signal is emitted for each property modified while the object is frozen.

    This is necessary for accessors that modify multiple properties to prevent premature notification while the object is still being modified.

    Returns void

  • get_data(key?: string): object
  • get_property(property_name?: string, value?: any): void
  • Gets a property of an object.

    The value can be:

    • an empty #GValue initialized by %G_VALUE_INIT, which will be automatically initialized with the expected type of the property (since GLib 2.60)
    • a #GValue initialized with the expected type of the property
    • a #GValue initialized with a type to which the expected type of the property can be transformed

    In general, a copy is made of the property contents and the caller is responsible for freeing the memory by calling g_value_unset().

    Note that g_object_get_property() is really intended for language bindings, g_object_get() is much more convenient for C programming.

    Parameters

    • Optional property_name: string

      the name of the property to get

    • Optional value: any

      return location for the property value

    Returns void

  • get_qdata(quark: number): object
  • Try to get the remote address of a socket connection.

    Since GLib 2.40, when used with g_socket_client_connect() or g_socket_client_connect_async(), during emission of %G_SOCKET_CLIENT_CONNECTING, this function will return the remote address that will be used for the connection. This allows applications to print e.g. "Connecting to example.com (10.42.77.3)...".

    Returns SocketAddress

  • getv(names: string[], values: any[]): void
  • Gets n_properties properties for an object. Obtained properties will be set to values. All properties must be valid. Warnings will be emitted and undefined behaviour may result if invalid properties are passed in.

    Parameters

    • names: string[]

      the names of each property to get

    • values: any[]

      the values of each property to get

    Returns void

  • has_pending(): boolean
  • is_closed(): boolean
  • is_connected(): boolean
  • is_floating(): boolean
  • notify(property_name: string): void
  • Emits a "notify" signal for the property property_name on object.

    When possible, eg. when signaling a property change from within the class that registered the property, you should use g_object_notify_by_pspec() instead.

    Note that emission of the notify signal may be blocked with g_object_freeze_notify(). In this case, the signal emissions are queued and will be emitted (in reverse order) when g_object_thaw_notify() is called.

    Parameters

    • property_name: string

      the name of a property installed on the class of object.

    Returns void

  • Emits a "notify" signal for the property specified by pspec on object.

    This function omits the property name lookup, hence it is faster than g_object_notify().

    One way to avoid using g_object_notify() from within the class that registered the properties, and using g_object_notify_by_pspec() instead, is to store the GParamSpec used with g_object_class_install_property() inside a static array, e.g.:

      enum
    {
    PROP_0,
    PROP_FOO,
    PROP_LAST
    };

    static GParamSpec *properties[PROP_LAST];

    static void
    my_object_class_init (MyObjectClass *klass)
    {
    properties[PROP_FOO] = g_param_spec_int ("foo", "Foo", "The foo",
    0, 100,
    50,
    G_PARAM_READWRITE);
    g_object_class_install_property (gobject_class,
    PROP_FOO,
    properties[PROP_FOO]);
    }

    and then notify a change on the "foo" property with:

      g_object_notify_by_pspec (self, properties[PROP_FOO]);
    

    Parameters

    • pspec: ParamSpec

      the #GParamSpec of a property installed on the class of object.

    Returns void

  • Receives credentials from the sending end of the connection. The sending end has to call g_unix_connection_send_credentials() (or similar) for this to work.

    As well as reading the credentials this also reads (and discards) a single byte from the stream, as this is required for credentials passing to work on some implementations.

    This method can be expected to be available on the following platforms:

    • Linux since GLib 2.26
    • FreeBSD since GLib 2.26
    • GNU/kFreeBSD since GLib 2.36
    • Solaris, Illumos and OpenSolaris since GLib 2.40
    • GNU/Hurd since GLib 2.40

    Other ways to exchange credentials with a foreign peer includes the #GUnixCredentialsMessage type and g_socket_get_credentials() function.

    Parameters

    Returns Gio.Credentials

  • Asynchronously receive credentials.

    For more details, see g_unix_connection_receive_credentials() which is the synchronous version of this call.

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

    Parameters

    • cancellable: Gio.Cancellable

      optional #GCancellable object, %NULL to ignore.

    • callback: AsyncReadyCallback

      a #GAsyncReadyCallback to call when the request is satisfied

    Returns void

  • Receives a file descriptor from the sending end of the connection. The sending end has to call g_unix_connection_send_fd() for this to work.

    As well as reading the fd this also reads a single byte from the stream, as this is required for fd passing to work on some implementations.

    Parameters

    • cancellable: Gio.Cancellable

      optional #GCancellable object, %NULL to ignore

    Returns number

  • Increases the reference count of object.

    Since GLib 2.56, if GLIB_VERSION_MAX_ALLOWED is 2.56 or greater, the type of object will be propagated to the return type (using the GCC typeof() extension), so any casting the caller needs to do on the return type must be explicit.

    Returns GObject.Object

  • Increase the reference count of object, and possibly remove the [floating][floating-ref] reference, if object has a floating reference.

    In other words, if the object is floating, then this call "assumes ownership" of the floating reference, converting it to a normal reference by clearing the floating flag while leaving the reference count unchanged. If the object is not floating, then this call adds a new normal reference increasing the reference count by one.

    Since GLib 2.56, the type of object will be propagated to the return type under the same conditions as for g_object_ref().

    Returns GObject.Object

  • run_dispose(): void
  • Passes the credentials of the current user the receiving side of the connection. The receiving end has to call g_unix_connection_receive_credentials() (or similar) to accept the credentials.

    As well as sending the credentials this also writes a single NUL byte to the stream, as this is required for credentials passing to work on some implementations.

    This method can be expected to be available on the following platforms:

    • Linux since GLib 2.26
    • FreeBSD since GLib 2.26
    • GNU/kFreeBSD since GLib 2.36
    • Solaris, Illumos and OpenSolaris since GLib 2.40
    • GNU/Hurd since GLib 2.40

    Other ways to exchange credentials with a foreign peer includes the #GUnixCredentialsMessage type and g_socket_get_credentials() function.

    Parameters

    Returns boolean

  • Asynchronously send credentials.

    For more details, see g_unix_connection_send_credentials() which is the synchronous version of this call.

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

    Parameters

    • cancellable: Gio.Cancellable

      optional #GCancellable object, %NULL to ignore.

    • callback: AsyncReadyCallback

      a #GAsyncReadyCallback to call when the request is satisfied

    Returns void

  • Finishes an asynchronous send credentials operation started with g_unix_connection_send_credentials_async().

    Parameters

    Returns boolean

  • Passes a file descriptor to the receiving side of the connection. The receiving end has to call g_unix_connection_receive_fd() to accept the file descriptor.

    As well as sending the fd this also writes a single byte to the stream, as this is required for fd passing to work on some implementations.

    Parameters

    • fd: number

      a file descriptor

    • cancellable: Gio.Cancellable

      optional #GCancellable object, %NULL to ignore.

    Returns boolean

  • set_data(key: string, data?: object): void
  • Each object carries around a table of associations from strings to pointers. This function lets you set an association.

    If the object already had an association with that name, the old association will be destroyed.

    Internally, the key is converted to a #GQuark using g_quark_from_string(). This means a copy of key is kept permanently (even after object has been finalized) — so it is recommended to only use a small, bounded set of values for key in your program, to avoid the #GQuark storage growing unbounded.

    Parameters

    • key: string

      name of the key

    • Optional data: object

      data to associate with that key

    Returns void

  • set_pending(): boolean
  • set_property(property_name: string, value?: any): void
  • Asynchronously splice the output stream of stream1 to the input stream of stream2, and splice the output stream of stream2 to the input stream of stream1.

    When the operation is finished callback will be called. You can then call g_io_stream_splice_finish() to get the result of the operation.

    Parameters

    Returns void

  • steal_data(key?: string): object
  • steal_qdata(quark: number): object
  • This function gets back user data pointers stored via g_object_set_qdata() and removes the data from object without invoking its destroy() function (if any was set). Usually, calling this function is only required to update user data pointers with a destroy notifier, for example:

    void
    object_add_to_user_list (GObject *object,
    const gchar *new_string)
    {
    // the quark, naming the object data
    GQuark quark_string_list = g_quark_from_static_string ("my-string-list");
    // retrieve the old string list
    GList *list = g_object_steal_qdata (object, quark_string_list);

    // prepend new string
    list = g_list_prepend (list, g_strdup (new_string));
    // this changed 'list', so we need to set it again
    g_object_set_qdata_full (object, quark_string_list, list, free_string_list);
    }
    static void
    free_string_list (gpointer data)
    {
    GList *node, *list = data;

    for (node = list; node; node = node->next)
    g_free (node->data);
    g_list_free (list);
    }

    Using g_object_get_qdata() in the above example, instead of g_object_steal_qdata() would have left the destroy function set, and thus the partial string list would have been freed upon g_object_set_qdata_full().

    Parameters

    • quark: number

      A #GQuark, naming the user data pointer

    Returns object

  • thaw_notify(): void
  • Reverts the effect of a previous call to g_object_freeze_notify(). The freeze count is decreased on object and when it reaches zero, queued "notify" signals are emitted.

    Duplicate notifications for each property are squashed so that at most one #GObject::notify signal is emitted for each property, in the reverse order in which they have been queued.

    It is an error to call this function when the freeze count is zero.

    Returns void

  • unref(): void
  • Decreases the reference count of object. When its reference count drops to 0, the object is finalized (i.e. its memory is freed).

    If the pointer to the #GObject may be reused in future (for example, if it is an instance variable of another object), it is recommended to clear the pointer to %NULL rather than retain a dangling pointer to a potentially invalid #GObject instance. Use g_clear_object() for this.

    Returns void

  • Requests an asynchronous close of the stream, releasing resources related to it. When the operation is finished callback will be called. You can then call g_io_stream_close_finish() to get the result of the operation.

    For behaviour details see g_io_stream_close().

    The asynchronous methods have a default fallback that uses threads to implement asynchronicity, so they are optional for inheriting classes. However, if you override one you must override all.

    virtual

    Parameters

    • io_priority: number

      the io priority of the request

    • cancellable: Gio.Cancellable

      optional cancellable object

    • callback: AsyncReadyCallback

      callback to call when the request is satisfied

    Returns void

  • vfunc_constructed(): void
  • vfunc_dispatch_properties_changed(n_pspecs: number, pspecs: ParamSpec): void
  • vfunc_dispose(): void
  • vfunc_finalize(): void
  • vfunc_get_property(property_id: number, value?: any, pspec?: ParamSpec): void
  • Emits a "notify" signal for the property property_name on object.

    When possible, eg. when signaling a property change from within the class that registered the property, you should use g_object_notify_by_pspec() instead.

    Note that emission of the notify signal may be blocked with g_object_freeze_notify(). In this case, the signal emissions are queued and will be emitted (in reverse order) when g_object_thaw_notify() is called.

    virtual

    Parameters

    Returns void

  • vfunc_set_property(property_id: number, value?: any, pspec?: ParamSpec): void
  • watch_closure(closure: TClosure<any, any>): void
  • This function essentially limits the life time of the closure to the life time of the object. That is, when the object is finalized, the closure is invalidated by calling g_closure_invalidate() on it, in order to prevent invocations of the closure with a finalized (nonexisting) object. Also, g_object_ref() and g_object_unref() are added as marshal guards to the closure, to ensure that an extra reference count is held on object during invocation of the closure. Usually, this function will be called on closures that use this object as closure data.

    Parameters

    • closure: TClosure<any, any>

      #GClosure to watch

    Returns void

  • compat_control(what: number, data: object): number
  • Looks up the #GType to be used when creating socket connections on sockets with the specified family, type and protocol.

    If no type is registered, the #GSocketConnection base type is returned.

    Parameters

    • g_type: GType<unknown>

      a #GType, inheriting from %G_TYPE_SOCKET_CONNECTION

    • family: SocketFamily

      a #GSocketFamily

    • type: SocketType

      a #GSocketType

    • protocol: number

      a protocol id

    Returns void

  • Find the #GParamSpec with the given name for an interface. Generally, the interface vtable passed in as g_iface will be the default vtable from g_type_default_interface_ref(), or, if you know the interface has already been loaded, g_type_default_interface_peek().

    Parameters

    • g_iface: TypeInterface

      any interface vtable for the interface, or the default vtable for the interface

    • property_name: string

      name of a property to look up.

    Returns ParamSpec

  • Add a property to an interface; this is only useful for interfaces that are added to GObject-derived types. Adding a property to an interface forces all objects classes with that interface to have a compatible property. The compatible property could be a newly created #GParamSpec, but normally g_object_class_override_property() will be used so that the object class only needs to provide an implementation and inherits the property description, default value, bounds, and so forth from the interface property.

    This function is meant to be called from the interface's default vtable initialization function (the class_init member of #GTypeInfo.) It must not be called after after class_init has been called for any object types implementing this interface.

    If pspec is a floating reference, it will be consumed.

    Parameters

    • g_iface: TypeInterface

      any interface vtable for the interface, or the default vtable for the interface.

    • pspec: ParamSpec

      the #GParamSpec for the new property

    Returns void

  • Lists the properties of an interface.Generally, the interface vtable passed in as g_iface will be the default vtable from g_type_default_interface_ref(), or, if you know the interface has already been loaded, g_type_default_interface_peek().

    Parameters

    • g_iface: TypeInterface

      any interface vtable for the interface, or the default vtable for the interface

    Returns ParamSpec[]

  • Creates a new instance of a #GObject subtype and sets its properties.

    Construction parameters (see %G_PARAM_CONSTRUCT, %G_PARAM_CONSTRUCT_ONLY) which are not explicitly specified are set to their default values.

    Parameters

    • object_type: GType<unknown>

      the type id of the #GObject subtype to instantiate

    • parameters: GObject.Parameter[]

      an array of #GParameter

    Returns GObject.Object

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