Symbol: ttycheckoutq
sys/kern/subr_prf.c
195
if (sess && sess->s_ttyvp && ttycheckoutq(sess->s_ttyp, 0)) {
sys/kern/tty.c
2513
if (ttycheckoutq(tp,0) == 0)
sys/sys/tty.h
266
int ttycheckoutq (struct tty *tp, int wait);