cpr_rdwr
err = cpr_rdwr(UIO_READ, vp, cf, sizeof (*cf));
if (rc = cpr_rdwr(UIO_WRITE, vp, cdef, sizeof (*cdef)))
(void) cpr_rdwr(UIO_WRITE, vp, &mini, sizeof (mini));
rc = cpr_rdwr(UIO_READ, vp, &mini, sizeof (mini));
rc = cpr_rdwr(UIO_READ, vp, cdef, sizeof (*cdef));
if (rc = cpr_rdwr(UIO_WRITE, vp,
rc = cpr_rdwr(UIO_READ, vp, &mini, sizeof (mini));