FD_WRITE

;;; Write to a file descriptor.
  ;;; Note: This is similar to `writev` in POSIX.
  ;;;
  ;;; Like POSIX, any calls of `write` (and other functions to read or write)
  ;;; for a regular file by other threads in the WASI process should not be
  ;;; interleaved while `write` is executed.
  (@interface func (export "fd_write")
    (param $fd $fd)
    ;;; List of scatter/gather vectors from which to retrieve data.
    (param $iovs $ciovec_array)
    (result $error (expected $size (error $errno)))
  )