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  snprintf(toybuf, sizeof(toybuf), "%s/%s", name, "/uevent");
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