int list_devices()
{
  int idx;
  int i;
  int num_devices;
  
  
  
  XInputClassInfo *ip;
  
  Display *display = XOpenDisplay(NULL);
   
  
  if(display == NULL) {
   fprintf(stderr, "Could not connect to X server\n");
   return RESULT_FAILURE_OPEN_DISPLAY;
  }

  XDeviceInfo *devices = XListInputDevices(display, &num_devices);
  
  Atom xi_keyboard = XInternAtom(display, XI_KEYBOARD, 0);

  Atom *props;
  Atom prop;
  int ndevs = 0;
  int nprops = 0;
  
  XDeviceInfo *info = XListInputDevices(display, &ndevs);
  XDevice *device;
  for(idx=0;idx<num_devices;++idx) {
    
    if (xi_keyboard  != devices[idx].type) {
      continue;
    }
      
    printf("%02d\t%s\n", (int)devices[idx].id, (char *)devices[idx].name);
                
    device = XOpenDevice(display,  devices[idx].id);     
    if(!device) {
      XFreeDeviceList(info);
      printf("syntog: cannot open device '%s'\n",  devices[idx].name);
      continue;
    }
 
    props = XListDeviceProperties(display, device, &nprops);
    if(!props || !nprops) {
      XCloseDevice(display, device);
      XFree(props);
      XFreeDeviceList(info);
      printf("syntog: no properties on device '%s'\n", info[ndevs].name);
    }
    
    while(nprops--) {
      if(props[nprops] == prop){
        break;
      }
    }
    
    if(!nprops) {
      XCloseDevice(display, device);
      XFree(props);
      XFreeDeviceList(info);
      printf("syntog: no synaptics properties on device '%s'\n", info[ndevs].name);
    }
          
  }
  
  return 0     ;
}