Gio.UnixConnection.receive_fd

### Method

# Gio UnixConnectionreceive_fd

since: 2.22

#### Declaration [src]

    gint
    g_unix_connection_receive_fd (
      GUnixConnection* connection,
      GCancellable* cancellable,
      GError** error
    )

#### Description [src]

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.

Available since: 2.22

#### Parameters

`cancellable`

  Type: `GCancellable`

  Optional `GCancellable` object, `NULL` to ignore.

  The argument can be `NULL`.
  The data is owned by the caller of the method.

`error`

  Type: `GError **`

  The return location for a recoverable error.

  The argument can be `NULL`.
  If the return location is not `NULL`, then you must initialize it to a `NULL` `GError*`.
  The argument will be left initialized to `NULL` by the method if there are no errors.
  In case of error, the argument will be set to a newly allocated `GError`; the caller will take ownership of the data, and be responsible for freeing it.

#### Return value

Type: `gint`

A file descriptor on success, -1 on error.