ring_init
if (ring_init(&netoring, netobuf, sizeof (netobuf)) != 1) {
if (ring_init(&netiring, netibuf, sizeof (netibuf)) != 1) {
extern int 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) {
ring_init:
goto ring_init;