#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <linux/input.h>
#include <sys/types.h>
#include <sys/stat.h>

int main(int argc, char *argv[])
{
	int fd;
	struct input_event ev;

	fd = open("/dev/input/event4", O_RDONLY);
	if (fd < 0)
	{
		perror("Cannot open file");
		return 1;
	}

	while(1)
	{
		if (read(fd, &ev, sizeof(struct input_event)) < 0)
		{
			perror("Cannot read");
			return 1;
		}
		if(ev.type== EV_KEY) {
			printf("Eventtype: %d\n"
			"\tcode: %d\n"
			"\tValue: %d\n" , ev.type, ev.code, ev.value);
		fflush(stdout);
		}
	}
}