pppinput           71 kern/tty_conf.c int	pppinput(int c, struct tty *tp);
pppinput          124 kern/tty_conf.c 	  pppinput, pppstart, ttymodem },		/* 5- PPPDISC */
pppinput          135 net/ppp_tty.c  int	pppinput(int c, struct tty *tp);