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
  10 //usage:#define lsusb_trivial_usage NOUSAGE_STR
  11 //usage:#define lsusb_full_usage ""
  12
  13 #include "libbb.h"
  14
  15 static int FAST_FUNC fileAction(
  16                 const char *fileName,
  17                 struct stat *statbuf UNUSED_PARAM,
  18                 void *userData UNUSED_PARAM,
  19                 int depth UNUSED_PARAM)
  20 {
  21         parser_t *parser;
  22         char *tokens[4];
  23         char *busnum = NULL, *devnum = NULL;
  24         int product_vid = 0, product_did = 0;
  25         char *uevent_filename = concat_path_file(fileName, "/uevent");
  26
  27         parser = config_open2(uevent_filename, fopen_for_read);
  28         free(uevent_filename);
  29
  30         while (config_read(parser, tokens, 4, 2, "\\/=", PARSE_NORMAL)) {
  31                 if ((parser->lineno == 1) && strcmp(tokens[0], "DEVTYPE") == 0) {
  32                         break;
  33                 }
  34
  35                 if (strcmp(tokens[0], "PRODUCT") == 0) {
  36                         product_vid = xstrtou(tokens[1], 16);
  37                         product_did = xstrtou(tokens[2], 16);
  38                         continue;
  39                 }
  40
  41                 if (strcmp(tokens[0], "BUSNUM") == 0) {
  42                         busnum = xstrdup(tokens[1]);
  43                         continue;
  44                 }
  45
  46                 if (strcmp(tokens[0], "DEVNUM") == 0) {
  47                         devnum = xstrdup(tokens[1]);
  48                         continue;
  49                 }
  50         }
  51         config_close(parser);
  52
  53         if (busnum) {
  54                 printf("Bus %s Device %s: ID %04x:%04x\n", busnum, devnum, product_vid, product_did);
  55                 free(busnum);
  56                 free(devnum);
  57         }
  58
  59         return TRUE;
  60 }
  61
  62 int lsusb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  63 int lsusb_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  64 {
  65         /* no options, no getopt */
  66
  67         recursive_action("/sys/bus/usb/devices",
  68                         ACTION_RECURSE,
  69                         fileAction,
  70                         NULL, /* dirAction */
  71                         NULL, /* userData */
  72                         0 /* depth */);
  73
  74         return EXIT_SUCCESS;
  75 }