OPIOCGETOPTNODE
if (cmd == OPIOCGETOPTNODE) {
if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0) {
if (ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode) < 0)
rv = ioctl(fd, OPIOCGETOPTNODE, (char *)&optnode);