/* showtty.c *	displays some current tty settings */#include	<stdio.h>#include	<termios.h>main(){	struct	termios ttyinfo;	/* this struct holds tty info */							if ( tcgetattr( 0 , &ttyinfo ) == -1 ){   /* get info */		perror( "cannot get params about stdin");		exit(1);	}						/* show info */	showbaud ( cfgetospeed( &ttyinfo ) );	/* get + show baud rate	*/	printf("The erase character is ascii %d, Ctrl-%c\n",			ttyinfo.c_cc[VERASE], ttyinfo.c_cc[VERASE]-1+'A');	printf("The line kill character is ascii %d, Ctrl-%c\n",			ttyinfo.c_cc[VKILL], ttyinfo.c_cc[VKILL]-1+'A');	show_some_flags( &ttyinfo );		/* show misc. flags	*/}showbaud( int thespeed )/* *	prints the speed in english */{	printf("the baud rate is ");	switch ( thespeed ){		case B300:	printf("300\n");	break;		case B600:	printf("600\n"); 	break;		case B1200:	printf("1200\n"); 	break;		case B1800:	printf("1800\n"); 	break;		case B2400:	printf("2400\n"); 	break;		case B4800:	printf("4800\n"); 	break;		case B9600:	printf("9600\n"); 	break;		default:	printf("Fast\n");	break;	}}struct flaginfo { int	fl_value; char	*fl_name; };struct flaginfo input_flags[] = {		IGNBRK	,	"Ignore break condition",		BRKINT	,	"Signal interrupt on break",		IGNPAR	,	"Ignore chars with parity errors",		PARMRK	,	"Mark parity errors",		INPCK	,	"Enable input parity check",		ISTRIP	,	"Strip character",		INLCR	,	"Map NL to CR on input",		IGNCR	,	"Ignore CR",		ICRNL	,	"Map CR to NL on input",		IXON	,	"Enable start/stop output control",		/* _IXANY  ,	"enable any char to restart output",	*/		IXOFF   ,	"Enable start/stop input control",		0	,	NULL };struct flaginfo local_flags[] = {		ISIG	,	"Enable signals",		ICANON	,	"Canonical input (erase and kill)",		/* _XCASE	,	"Canonical upper/lower appearance", */		ECHO	,	"Enable echo",		ECHOE	,	"Echo ERASE as BS-SPACE-BS",		ECHOK	,	"Echo KILL by starting new line",		0	,	NULL };show_some_flags( struct termios *ttyp )/* *	show the values of two of the flag sets_: c_iflag and c_lflag *	adding c_oflag and c_cflag is pretty routine - just add new *	tables above and a bit more code below. */{	show_flagset( ttyp->c_iflag, input_flags );	show_flagset( ttyp->c_lflag, local_flags );}show_flagset( int thevalue, struct flaginfo thebitnames[] )/* * check each bit pattern and display descriptive title */{	int	i;		for ( i=0; thebitnames[i].fl_value ; i++ ) {		printf( "  %s is ", thebitnames[i].fl_name);		if ( thevalue & thebitnames[i].fl_value )			printf("ON\n");		else			printf("OFF\n");	}}