SOCK_SEND

;;; Send a message on a socket.
  ;;; Note: This is similar to `send` in POSIX, though it also supports writing
  ;;; the data from multiple buffers in the manner of `writev`.
  (@interface func (export "sock_send")
    (param $fd $fd)
    ;;; List of scatter/gather vectors to which to retrieve data
    (param $si_data $ciovec_array)
    ;;; Message flags.
    (param $si_flags $siflags)
    ;;; Number of bytes transmitted.
    (result $error (expected $size (error $errno)))
  )