#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

int main (int argc, char** argv)
{
	char buffer [1000];
	struct termios options;
	int tty = NULL;
	int len;
	FILE* input = stdin;

	if (argc > 1)
	{
		input = fopen (argv [1], "r");
	}

	tty = open ("/dev/ttyS1", O_RDWR | O_NOCTTY);
	if (tty < 0)
	{
		printf ("Cannot open tty.\n");
		return 1;
	}

	// assuming we have root
	tcgetattr (tty, &options);
	// setting BAUD to 50
	cfsetispeed (&options, B50);
	cfsetospeed (&options, B50);
	// turning off echo
	options.c_lflag &= ~ECHO;
	tcsetattr (tty, TCSANOW, &options);

	while (read (tty, buffer, 1))
	{
		read (tty, buffer, len);
		if (buffer [0] != '\0')
			printf ("%c", buffer [0]);
	}

	close (tty);

	return 0;
}