ttyin
process_rings(int netin, int netout, int netex, int ttyin, int ttyout, int poll)
if (ttyin) {
int netin, netout, netex, ttyin, ttyout;
ttyin = (ring_empty_count(&ttyiring) && !eof_pending);
ttyin = ttyout = 0;
returnValue = process_rings(netin, netout, netex, ttyin, ttyout,
ttyin (cmdbuf, 78, '/');
ttyin (cmdbuf, 78, '!');
static void ttyin(char buf[], register int nmax, char pchar);
static int ttyin();
if (ttyin())