1852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake/* 21eff220474f63d7ea7f8f99bef2a3da9da5324ebhjelmn@cs.unm.edu * libusb example program to list devices on the bus 3a544e5972bf2b0ac9e006439576f681a8439d311Pete Batard * Copyright © 2007 Daniel Drake <dsd@gentoo.org> 4852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * 5852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * This library is free software; you can redistribute it and/or 6852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * modify it under the terms of the GNU Lesser General Public 7852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * License as published by the Free Software Foundation; either 8852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * version 2.1 of the License, or (at your option) any later version. 9852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * 10852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * This library is distributed in the hope that it will be useful, 11852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * but WITHOUT ANY WARRANTY; without even the implied warranty of 12852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * Lesser General Public License for more details. 14852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * 15852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * You should have received a copy of the GNU Lesser General Public 16852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * License along with this library; if not, write to the Free Software 17852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake */ 19852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake 20852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake#include <stdio.h> 21852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake 2238e6eb86b2ceb301d67fd4754c5a1493f7911eceLudovic Rousseau#include "libusb.h" 23852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake 248392ff22136fccaf1e15d186157609b8dd127bc5Ludovic Rousseaustatic void print_devs(libusb_device **devs) 25852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake{ 269cfdb494fccac53a4277da7c8b6d15f1a72a4959Daniel Drake libusb_device *dev; 27ebac6ac1b30aea6e9190cce336eb75dc0f1c5ce7Hans de Goede int i = 0, j = 0; 28ebac6ac1b30aea6e9190cce336eb75dc0f1c5ce7Hans de Goede uint8_t path[8]; 29852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake 309cfdb494fccac53a4277da7c8b6d15f1a72a4959Daniel Drake while ((dev = devs[i++]) != NULL) { 31fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake struct libusb_device_descriptor desc; 32fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake int r = libusb_get_device_descriptor(dev, &desc); 33fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake if (r < 0) { 34fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake fprintf(stderr, "failed to get device descriptor"); 35fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake return; 36fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake } 37fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake 38ebac6ac1b30aea6e9190cce336eb75dc0f1c5ce7Hans de Goede printf("%04x:%04x (bus %d, device %d)", 39fe4adcc99e30115204ab832ad3e0170c9aca7629Daniel Drake desc.idVendor, desc.idProduct, 403675e978fb7a1042f8601931255658bcd14a2298Daniel Drake libusb_get_bus_number(dev), libusb_get_device_address(dev)); 41ebac6ac1b30aea6e9190cce336eb75dc0f1c5ce7Hans de Goede 42f3fcf8402609d946d16eb2d9686bf76d7b0b8ae0Hans de Goede r = libusb_get_port_numbers(dev, path, sizeof(path)); 43f3fcf8402609d946d16eb2d9686bf76d7b0b8ae0Hans de Goede if (r > 0) { 44f3fcf8402609d946d16eb2d9686bf76d7b0b8ae0Hans de Goede printf(" path: %d", path[0]); 45f3fcf8402609d946d16eb2d9686bf76d7b0b8ae0Hans de Goede for (j = 1; j < r; j++) 46f3fcf8402609d946d16eb2d9686bf76d7b0b8ae0Hans de Goede printf(".%d", path[j]); 47ebac6ac1b30aea6e9190cce336eb75dc0f1c5ce7Hans de Goede } 48ebac6ac1b30aea6e9190cce336eb75dc0f1c5ce7Hans de Goede printf("\n"); 49852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake } 50852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake} 51852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake 52852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drakeint main(void) 53852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake{ 549cfdb494fccac53a4277da7c8b6d15f1a72a4959Daniel Drake libusb_device **devs; 55637a8d7ff8a11a23588925d9d3003a609bda8075Daniel Drake int r; 565741bfe01a2481b8c3830c80edc3637bf62a7e16Daniel Drake ssize_t cnt; 57637a8d7ff8a11a23588925d9d3003a609bda8075Daniel Drake 581df713d622ab4f0b03aad72d903ac7beb8fb3b90Daniel Drake r = libusb_init(NULL); 59637a8d7ff8a11a23588925d9d3003a609bda8075Daniel Drake if (r < 0) 60637a8d7ff8a11a23588925d9d3003a609bda8075Daniel Drake return r; 61637a8d7ff8a11a23588925d9d3003a609bda8075Daniel Drake 621df713d622ab4f0b03aad72d903ac7beb8fb3b90Daniel Drake cnt = libusb_get_device_list(NULL, &devs); 635878daa85e3364bb3885190425d4f9deaa2d8c36Daniel Drake if (cnt < 0) 645878daa85e3364bb3885190425d4f9deaa2d8c36Daniel Drake return (int) cnt; 65852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake 66852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake print_devs(devs); 679cfdb494fccac53a4277da7c8b6d15f1a72a4959Daniel Drake libusb_free_device_list(devs, 1); 68852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake 691df713d622ab4f0b03aad72d903ac7beb8fb3b90Daniel Drake libusb_exit(NULL); 70852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake return 0; 71852bba4754ec57679c823f33e8feba6e4a564cbDaniel Drake} 72