text: // Copyright (c) 2014-2020, The KomputerKult Project
  // 
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  // 
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    conditions and the following disclaimer.
  // 
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  // 
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #include <libusb.h>
  
  #define UNUSED(expr) (void)(expr)
  
  int main(int argc, char *argv[]) {
    libusb_device **devs;
    libusb_context *ctx = NULL;
  
    int r = libusb_init(&ctx); UNUSED(r);
    ssize_t cnt = libusb_get_device_list(ctx, &devs); UNUSED(cnt);
  
    struct libusb_device_descriptor desc;
    r = libusb_get_device_descriptor(devs[0], &desc); UNUSED(r);
    uint8_t bus_id = libusb_get_bus_number(devs[0]); UNUSED(bus_id);
    uint8_t addr = libusb_get_device_address(devs[0]); UNUSED(addr);
  
    uint8_t tmp_path[16];
    r = libusb_get_port_numbers(devs[0], tmp_path, sizeof(tmp_path));
    UNUSED(r);
    UNUSED(tmp_path);
  
    libusb_free_device_list(devs, 1);
    libusb_exit(ctx);
  }
  