TSA_PTC_READ
error = tsleep(TSA_PTC_READ(tp), PCATCH, "nmdout", 0);
wakeup(TSA_PTC_READ((&otherpart->nm_tty)));
wakeup(TSA_PTC_READ(tp));
error = tsleep(TSA_PTC_READ(tp), PCATCH, "ptcin", 0);