/*

 * libusb example program to list devices on the bus

 * Copyright (C) 2007 Daniel Drake <dsd@gentoo.org></dsd@gentoo.org>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include <stdio.h></stdio.h>

#include <sys types.h=""></sys>

#include <libusb.h></libusb.h>

static void print_devs(libusb_device **devs)

{

	libusb_device *dev;

	int i = 0;

	while ((dev = devs[i++]) != NULL) {

		struct libusb_device_descriptor desc;

		int r = libusb_get_device_descriptor(dev, &desc);

		if (r < 0) {

			fprintf(stderr, "failed to get device descriptor");

			return;

		}

		printf("%04x:%04x (bus %d, device %d)\n",

			desc.idVendor, desc.idProduct,

			libusb_get_bus_number(dev), libusb_get_device_address(dev));

	}

}

int main(void)

{

	libusb_device **devs;

	int r;

	ssize_t cnt;

	r = libusb_init(NULL);

	if (r < 0)

		return r;

	cnt = libusb_get_device_list(NULL, &devs);

	if (cnt < 0)

		return (int) cnt;

	print_devs(devs);

	libusb_free_device_list(devs, 1);

	libusb_exit(NULL);

	return 0;

}