/* Program to add hardware flow control to the modem */

#include <stdio.h>
#include <fcntl.h>
#include <termios.h>
#include <sys/tty.h>

main (argc,argv)
{
	int argc;
	char *argv[];
	int fd;
	if ( (fd = open(argv[1], O_NDELAY|O_RDWR)) <0 )
	{
		printf("%s: could not open %sn",argv[0],argv[1]);
		exit (22);
	}
	ioctl(fd, TXADDCD, "rts");
	/* adds rts to the tty in the argument */
	close(fd);
}