LXR toybox/toys/other/lsusb.c

   1/* lsusb.c - list available USB devices
   2 *
   3 * Copyright 2013 Andre Renaud <andre@bluewatersys.com>
   4
   5USE_LSUSB(NEWTOY(lsusb, NULL, TOYFLAG_USR|TOYFLAG_BIN))
   6
   7config LSUSB
   8  bool "lsusb"
   9  default y
  10  help
  11    usage: lsusb
  12
  13    List USB hosts/devices.
  14*/
  15
  16#include "toys.h"
  17
  18static int list_device(struct dirtree *new)
  19{
  20  FILE *file;
  21  char *name;
  22  int busnum = 0, devnum = 0, pid = 0, vid = 0;
  23
  24  if (!new->parent) return DIRTREE_RECURSE;
  25  if (new->name[0] == '.') return 0;
  26  name = dirtree_path(new, 0);
  27  sprintf(toybuf, "%s/uevent", name);
  28  file = fopen(toybuf, "r");
  29  if (file) {
  30    int count = 0;
  31
  32    while (fgets(toybuf, sizeof(toybuf), file))
  33      if (sscanf(toybuf, "BUSNUM=%u\n", &busnum)
  34          || sscanf(toybuf, "DEVNUM=%u\n", &devnum)
  35          || sscanf(toybuf, "PRODUCT=%x/%x/", &pid, &vid)) count++;
  36
  37    if (count == 3)
  38      printf("Bus %03d Device %03d: ID %04x:%04x\n", busnum, devnum, pid, vid);
  39    fclose(file);
  40  }
  41  free(name);
  42
  43  return 0;
  44}
  45
  46void lsusb_main(void)
  47{
  48  dirtree_read("/sys/bus/usb/devices/", list_device);
  49}
  50