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1 /* | |
2 * libusb example program to list devices on the bus | |
3 * Copyright (C) 2007 Daniel Drake <dsd@gentoo.org> | |
4 * | |
5 * This library is free software; you can redistribute it and/or | |
6 * modify it under the terms of the GNU Lesser General Public | |
7 * License as published by the Free Software Foundation; either | |
8 * version 2.1 of the License, or (at your option) any later version. | |
9 * | |
10 * This library is distributed in the hope that it will be useful, | |
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 * Lesser General Public License for more details. | |
14 * | |
15 * You should have received a copy of the GNU Lesser General Public | |
16 * License along with this library; if not, write to the Free Software | |
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
18 */ | |
19 | |
20 #include <stdio.h> | |
21 #include <sys/types.h> | |
22 | |
23 #include <libusb.h> | |
24 | |
25 static void print_devs(libusb_device **devs) | |
26 { | |
27 libusb_device *dev; | |
28 int i = 0; | |
29 | |
30 while ((dev = devs[i++]) != NULL) { | |
31 struct libusb_device_descriptor desc; | |
32 int r = libusb_get_device_descriptor(dev, &desc); | |
33 if (r < 0) { | |
34 fprintf(stderr, "failed to get device descriptor"); | |
35 return; | |
36 } | |
37 | |
38 printf("%04x:%04x (bus %d, device %d)\n", | |
39 desc.idVendor, desc.idProduct, | |
40 libusb_get_bus_number(dev), libusb_get_device_address(de
v)); | |
41 } | |
42 } | |
43 | |
44 int main(void) | |
45 { | |
46 libusb_device **devs; | |
47 int r; | |
48 ssize_t cnt; | |
49 | |
50 r = libusb_init(NULL); | |
51 if (r < 0) | |
52 return r; | |
53 | |
54 cnt = libusb_get_device_list(NULL, &devs); | |
55 if (cnt < 0) | |
56 return (int) cnt; | |
57 | |
58 print_devs(devs); | |
59 libusb_free_device_list(devs, 1); | |
60 | |
61 libusb_exit(NULL); | |
62 return 0; | |
63 } | |
64 | |
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