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65 lines
1.6 KiB
65 lines
1.6 KiB
11 years ago
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/*
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* libusb example program to list devices on the bus
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* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <libusb.h>
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static void print_devs(libusb_device **devs)
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{
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libusb_device *dev;
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int i = 0;
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while ((dev = devs[i++]) != NULL) {
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struct libusb_device_descriptor desc;
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int r = libusb_get_device_descriptor(dev, &desc);
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if (r < 0) {
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fprintf(stderr, "failed to get device descriptor");
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return;
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}
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printf("%04x:%04x (bus %d, device %d)\n",
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desc.idVendor, desc.idProduct,
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libusb_get_bus_number(dev), libusb_get_device_address(dev));
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}
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}
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int main(void)
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{
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libusb_device **devs;
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int r;
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ssize_t cnt;
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r = libusb_init(NULL);
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if (r < 0)
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return r;
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cnt = libusb_get_device_list(NULL, &devs);
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if (cnt < 0)
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return (int) cnt;
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print_devs(devs);
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libusb_free_device_list(devs, 1);
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libusb_exit(NULL);
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return 0;
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}
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