#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>

#include <linux/input.h>
#include <linux/serial.h>
#include <errno.h>
#include <unistd.h>
#include <termios.h>

#include <string.h>
#include <linux/input.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>

int main (int argc, char *argv[]) {
    int i, fd, ret;
    struct input_event ev[64];

    if ((fd = open(argv[1], O_RDWR)) < 0) {
        perror("Couldn't open input device");
        return 1;
    }

	int version;

	if (ioctl(fd, EVIOCGVERSION, &version)) {
		perror("evdev ioctl");
	}

	/* the EVIOCGVERSION ioctl() returns an int */
	/* so we unpack it and display it */
	printf("evdev driver version is %d.%d.%d\n",
		   version >> 16, (version >> 8) & 0xff,
		   version & 0xff);

	int codes[2];
	for (i=0; i<130; i++) {
		codes[0] = i;
		if(ioctl(fd, EVIOCSKEYCODE, codes)) {
			perror("evdev ioctl");
		}
		printf("[0]= %d, [1] = %d\n",
			   codes[0], codes[1]);
	}

	codes[0] = 58; /* M keycap */
	codes[1] = 49; /* assign to N */

	if(ioctl(fd, EVIOCSKEYCODE, codes)) {
		perror("evdev ioctl");
	}
	
	printf("Testing changes\n");
	
	for (i=49; i<60; i++) {
		codes[0] = i;
		if(ioctl(fd, EVIOCSKEYCODE, codes)) {
			perror("evdev ioctl");
		}
		printf("[0]= %d, [1] = %d\n",
			   codes[0], codes[1]);
	}

	return 0;
}