FD_PWRITE

;;; Write to a file descriptor, without using and updating the file descriptor's offset.
  ;;; Note: This is similar to `pwritev` in Linux (and other Unix-es).
  ;;;
  ;;; Like Linux (and other Unix-es), any calls of `pwrite` (and other
  ;;; functions to read or write) for a regular file by other threads in the
  ;;; WASI process should not be interleaved while `pwrite` is executed.
  (@interface func (export "fd_pwrite")
    (param $fd $fd)
    ;;; List of scatter/gather vectors from which to retrieve data.
    (param $iovs $ciovec_array)
    ;;; The offset within the file at which to write.
    (param $offset $filesize)
    ;;; The number of bytes written.
    (result $error (expected $size (error $errno)))
  )