rn_writefd
if (rn->rn_writefd != -1)
RUMPUSER_OPEN_WRONLY, &rn->rn_writefd);
if ((error = rumpuser_iovwrite(rn->rn_writefd, &iov, 1,
if (rn->rn_writefd != -1) {
rumpuser_close(rn->rn_writefd);
rn->rn_writefd = -1;
rn->rn_writefd = -1;