Transmitting BREAK

[gwyn%brl-vld at sri-unix.UUCP]

From:      Doug Gwyn (VLD/VMB) <gwyn at brl-vld>

/*	sendbreak -- send BREAK to terminal	*/

#include	<fcntl.h>
#include	<sys/ioctl.h>

extern void	exit(), perror();
extern int	ioctl(), open();

main( argc, argv )
	int	argc;
	char	*argv[];
	{
	register char	*tty;		/* terminal file name */
	register int	fd;		/* terminal file descriptor */

	if ( argc < 2 )
		tty = "/dev/tty";
	else
		tty = argv[1];

	if ( (fd = open( tty, O_RDONLY )) < 0
	  || ioctl( fd, TCSBRK, 0 ) < 0
	   )	{
		perror( tty );
		exit( 1 );
		}

	exit( 0 );
	}