tag	line	file	source code
ECHOCTL	1778	drivers/char/tty_io.c	ECHOCTL | ECHOKE | IEXTEN;
ECHOCTL	1784	drivers/char/tty_io.c	ECHOCTL | ECHOKE | IEXTEN;
ECHOCTL	221	include/linux/tty.h	#define L_ECHOCTL(tty)  _L_FLAG((tty),ECHOCTL)