1 /* lsusb.c - list available USB devices
2 *
3 * Copyright 2013 Andre Renaud <andre@bluewatersys.com>
4
5 USE_LSUSB(NEWTOY(lsusb, NULL, TOYFLAG_USR|TOYFLAG_BIN))
6
7 config 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
list_device(struct dirtree * new)18 static 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
lsusb_main(void)46 void lsusb_main(void)
47 {
48 dirtree_read("/sys/bus/usb/devices/", list_device);
49 }
50