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      1 /* lsusb.c - list available USB devices
      2  *
      3  * Copyright 2013 Andre Renaud <andre (at) 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 
     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 
     46 void lsusb_main(void)
     47 {
     48   dirtree_read("/sys/bus/usb/devices/", list_device);
     49 }
     50