LXR busybox/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//config:config LSUSB
  10//config:       bool "lsusb (4.2 kb)"
  11//config:       default y
  12//config:       #select PLATFORM_LINUX
  13//config:       help
  14//config:       lsusb is a utility for displaying information about USB buses in the
  15//config:       system and devices connected to them.
  16//config:
  17//config:       This version uses sysfs (/sys/bus/usb/devices) only.
  18
  19//applet:IF_LSUSB(APPLET_NOEXEC(lsusb, lsusb, BB_DIR_USR_BIN, BB_SUID_DROP, lsusb))
  20
  21//kbuild:lib-$(CONFIG_LSUSB) += lsusb.o
  22
  23//usage:#define lsusb_trivial_usage NOUSAGE_STR
  24//usage:#define lsusb_full_usage ""
  25
  26#include "libbb.h"
  27
  28static int FAST_FUNC fileAction(
  29                const char *fileName,
  30                struct stat *statbuf UNUSED_PARAM,
  31                void *userData UNUSED_PARAM,
  32                int depth UNUSED_PARAM)
  33{
  34        parser_t *parser;
  35        char *tokens[4];
  36        char *busnum = NULL, *devnum = NULL;
  37        int product_vid = 0, product_did = 0;
  38        char *uevent_filename = concat_path_file(fileName, "/uevent");
  39
  40        parser = config_open2(uevent_filename, fopen_for_read);
  41        free(uevent_filename);
  42
  43        while (config_read(parser, tokens, 4, 2, "\\/=", PARSE_NORMAL)) {
  44                if ((parser->lineno == 1) && strcmp(tokens[0], "DEVTYPE") == 0) {
  45                        break;
  46                }
  47
  48                if (strcmp(tokens[0], "PRODUCT") == 0) {
  49                        product_vid = xstrtou(tokens[1], 16);
  50                        product_did = xstrtou(tokens[2], 16);
  51                        continue;
  52                }
  53
  54                if (strcmp(tokens[0], "BUSNUM") == 0) {
  55                        busnum = xstrdup(tokens[1]);
  56                        continue;
  57                }
  58
  59                if (strcmp(tokens[0], "DEVNUM") == 0) {
  60                        devnum = xstrdup(tokens[1]);
  61                        continue;
  62                }
  63        }
  64        config_close(parser);
  65
  66        if (busnum) {
  67                printf("Bus %s Device %s: ID %04x:%04x\n", busnum, devnum, product_vid, product_did);
  68                free(busnum);
  69                free(devnum);
  70        }
  71
  72        return TRUE;
  73}
  74
  75int lsusb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  76int lsusb_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  77{
  78        /* no options, no getopt */
  79
  80        recursive_action("/sys/bus/usb/devices",
  81                        ACTION_RECURSE,
  82                        fileAction,
  83                        NULL, /* dirAction */
  84                        NULL, /* userData */
  85                        0 /* depth */);
  86
  87        return EXIT_SUCCESS;
  88}
  89