util-linux/lsusb.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * lsusb implementation for busybox
   4  *
   5  * Copyright (C) 2009  Malek Degachi <malek-degachi@laposte.net>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   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[4];
  19         char *busnum = NULL, *devnum = NULL;
  20         int product_vid = 0, product_did = 0;
  21         char *uevent_filename = concat_path_file(fileName, "/uevent");
  22
  23         parser = config_open2(uevent_filename, fopen_for_read);
  24         free(uevent_filename);
  25
  26         while (config_read(parser, tokens, 4, 2, "\\/=", PARSE_NORMAL)) {
  27                 if ((parser->lineno == 1) && strcmp(tokens[0], "DEVTYPE") == 0) {
  28                         break;
  29                 }
  30
  31                 if (strcmp(tokens[0], "PRODUCT") == 0) {
  32                         product_vid = xstrtou(tokens[1], 16);
  33                         product_did = xstrtou(tokens[2], 16);
  34                         continue;
  35                 }
  36
  37                 if (strcmp(tokens[0], "BUSNUM") == 0) {
  38                         busnum = xstrdup(tokens[1]);
  39                         continue;
  40                 }
  41
  42                 if (strcmp(tokens[0], "DEVNUM") == 0) {
  43                         devnum = xstrdup(tokens[1]);
  44                         continue;
  45                 }
  46         }
  47         config_close(parser);
  48
  49         if (busnum) {
  50                 printf("Bus %s Device %s: ID %04x:%04x\n", busnum, devnum, product_vid, product_did);
  51                 free(busnum);
  52                 free(devnum);
  53         }
  54
  55         return TRUE;
  56 }
  57
  58 int lsusb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  59 int lsusb_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  60 {
  61         /* no options, no getopt */
  62
  63         recursive_action("/sys/bus/usb/devices",
  64                         ACTION_RECURSE,
  65                         fileAction,
  66                         NULL, /* dirAction */
  67                         NULL, /* userData */
  68                         0 /* depth */);
  69
  70         return EXIT_SUCCESS;
  71 }