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

#ifndef N_TTY
#define N_TTY 0
#endif
#ifndef N_TIHTC
#define N_TIHTC 17
#endif

/* stolen from HCIUART set/get protocol ioctls */
#define TIHTCSETCHAN _IOW('U', 200, int)
#define TIHTCGETCHAN _IOR('U', 201, int)

int main(int argc, char *argv[])
{
	int fd, ldisc, channel = 0;

	if (argc < 2) {
		printf("Usage: %s <dev>\n", argv[0]);
		return -1;
	}
	fd = open(argv[1], O_RDONLY);
	if (fd < 0) {
		printf("Can't open %s\n", argv[1]);
		return -1;
	}

	/* Set TTY to N_TIHTC line discipline */
	ldisc = N_TIHTC;
	if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
		perror("Can't set line discipline");
		return -1;
	}

	/* Set DEBUG channel */
	channel = 0x12;
	if (ioctl(fd, TIHTCSETCHAN, channel) < 0) {
		perror("Can't set channel");
		return -1;
	}

	while (1) {
		char buf[1024];
		int n;
		n = read(fd, buf, 2048);
		if (n < 0) {
			perror("Read error\n");
			break;
		}
		buf[n] = '\0';
		if (n>0) {
			while (--n)
				if (buf[n] == '\r')
					buf[n] = '\n';
			printf("%s", buf);
			fflush(stdout);
		}
	}

	close(fd);
	return 0;
}