pppclose           68 kern/tty_conf.c int	pppclose(struct tty *tp, int flags);
pppclose          123 kern/tty_conf.c 	{ pppopen, pppclose, pppread, pppwrite, ppptioctl,
pppclose          130 net/ppp_tty.c  int	pppclose(struct tty *tp, int flag);