ring_init
if (ring_init(&netoring, netobuf, sizeof netobuf) != 1) {
if (ring_init(&netiring, netibuf, sizeof netibuf) != 1) {
ring_init(Ring *ring, unsigned char *buffer, int count);
if (ring_init(&ttyoring, ttyobuf, sizeof ttyobuf) != 1) {
if (ring_init(&ttyiring, ttyibuf, sizeof ttyibuf) != 1) {