FD_PREAD

;;; Read from a file descriptor, without using and updating the file descriptor's offset.
  ;;; Note: This is similar to `preadv` in Linux (and other Unix-es).
  (@interface func (export "fd_pread")
    (param $fd $fd)
    ;;; List of scatter/gather vectors in which to store data.
    (param $iovs $iovec_array)
    ;;; The offset within the file at which to read.
    (param $offset $filesize)
    ;;; The number of bytes read.
    (result $error (expected $size (error $errno)))
  )