#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>

/*
#include <linux/hidraw.h>
*/
#include "/home/ao2/Proj/linux/linux-2.6/include/linux/hidraw.h"

void dump_hex_string(unsigned char *buf, unsigned int len)
{
	unsigned int i;

	for (i = 0; i < len; i++)
		printf("%02x%c", buf[i], i < len - 1 ? ' ' : 0);
}

void dump_feature_report(int fd, uint8_t report_number, unsigned int len)
{
	unsigned char *buf;
	int ret;

	buf = calloc(len, sizeof(*buf));

	buf[0] = report_number;

	ret = ioctl(fd, HIDIOCGFEATURE(len), buf);
	if (ret < 0) {
		fprintf(stderr, "report: 0x%02x ret: %d\n", report_number, ret);
		/* XXX: if I put exit(1) here the bug is masked */
		return;
	}

	dump_hex_string(buf, len);
	printf("\r");
	fflush(stdout);

	free(buf);
}

int main(int argc, char *argv[])
{
	int fd = -1;

	if (argc != 2) {
		fprintf(stderr, "usage: %s </dev/hidrawX>\n", argv[0]);
		exit(1);
	}

	fd = open(argv[1], O_RDWR);
	if (fd < 0) {
		perror("hidraw open");
		exit(1);
	}

	while (1)
		dump_feature_report(fd, 0x01, 45);
	printf("\n");

	close(fd);
	exit(0);
}