man/hwdb-usb-device.c

   1 /* SPDX-License-Identifier: MIT-0 */
   2
   3 #include <stdio.h>
   4 #include <stdint.h>
   5 #include <systemd/sd-hwdb.h>
   6
   7 int print_usb_properties(uint16_t vid, uint16_t pid) {
   8   char match[128];
   9   sd_hwdb *hwdb;
  10   const char *key, *value;
  11   int r;
  12
  13   /* Match this USB vendor and product ID combination */
  14   snprintf(match, sizeof match, "usb:v%04Xp%04X", vid, pid);
  15
  16   r = sd_hwdb_new(&hwdb);
  17   if (r < 0)
  18     return r;
  19
  20   SD_HWDB_FOREACH_PROPERTY(hwdb, match, key, value)
  21     printf("%s: \"%s\" → \"%s\"\n", match, key, value);
  22
  23   sd_hwdb_unref(hwdb);
  24   return 0;
  25 }
  26
  27 int main(int argc, char **argv) {
  28   print_usb_properties(0x046D, 0xC534);
  29   return 0;
  30 }