util-linux/lsusb.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3 * lspci implementation for busybox
   4 *
   5 * Copyright (C) 2009  Malek Degachi <malek-degachi@laposte.net>
   6 *
   7 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
   8 */
   9 #include <libbb.h>
  10
  11 static int FAST_FUNC fileAction(
  12                 const char *fileName,
  13                 struct stat *statbuf UNUSED_PARAM,
  14                 void *userData UNUSED_PARAM,
  15                 int depth UNUSED_PARAM)
  16 {
  17         parser_t *parser;
  18         char *tokens[6];
  19         char *bus = NULL, *device = NULL;
  20         int product_vid = 0, product_did = 0;
  21
  22         char *uevent_filename = concat_path_file(fileName, "/uevent");
  23         parser = config_open2(uevent_filename, fopen_for_read);
  24         free(uevent_filename);
  25
  26         while (config_read(parser, tokens, 6, 1, "\\/=", PARSE_NORMAL)) {
  27                 if ((parser->lineno == 1) && strcmp(tokens[0], "DEVTYPE") == 0) {
  28                         break;
  29                 }
  30
  31                 if (strcmp(tokens[0], "DEVICE") == 0) {
  32                         bus = xstrdup(tokens[4]);
  33                         device = xstrdup(tokens[5]);
  34                         continue;
  35                 }
  36
  37                 if (strcmp(tokens[0], "PRODUCT") == 0) {
  38                         product_vid = xstrtou(tokens[1], 16);
  39                         product_did = xstrtou(tokens[2], 16);
  40                         continue;
  41                 }
  42         }
  43         config_close(parser);
  44
  45         if (bus) {
  46                 printf("Bus %s Device %s: ID %04x:%04x\n", bus, device, product_vid, product_did);
  47                 free(bus);
  48                 free(device);
  49         }
  50
  51         return TRUE;
  52 }
  53
  54 int lsusb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  55 int lsusb_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  56 {
  57         /* no options, no getopt */
  58
  59         recursive_action("/sys/bus/usb/devices",
  60                         ACTION_RECURSE,
  61                         fileAction,
  62                         NULL, /* dirAction */
  63                         NULL, /* userData */
  64                         0 /* depth */);
  65
  66         return EXIT_SUCCESS;
  67 }