#if !defined ISO && !defined ISO99 && !defined ISO11 && !defined POSIX && !defined XPG4 && !defined POSIX2008
type {struct iovec}

element {struct iovec} {void*} iov_base
element {struct iovec} size_t iov_len

function ssize_t readv (int, const struct iovec*, int)
function ssize_t writev (int, const struct iovec*, int)

allow iov_*
allow IOV_*
allow *_t
allow UIO_MAXIOV
#endif