code: func DeviceFromPath(path, permissions string) (*configs.Device, error) {
  	fileInfo, err := osLstat(path)
  	if err != nil {
  		return nil, err
  	}
  	var (
  		devType                rune
  		mode                   = fileInfo.Mode()
  		fileModePermissionBits = os.FileMode.Perm(mode)
  	)
  	switch {
  	case mode&os.ModeDevice == 0:
  		return nil, ErrNotADevice
  	case mode&os.ModeCharDevice != 0:
  		fileModePermissionBits |= syscall.S_IFCHR
  		devType = 'c'
  	default:
  		fileModePermissionBits |= syscall.S_IFBLK
  		devType = 'b'
  	}
  	stat_t, ok := fileInfo.Sys().(*syscall.Stat_t)
  	if !ok {
  		return nil, fmt.Errorf("cannot determine the device number for device %s", path)
  	}
  	devNumber := int(stat_t.Rdev)
  	return &configs.Device{
  		Type:        devType,
  		Path:        path,
  		Major:       Major(devNumber),
  		Minor:       Minor(devNumber),
  		Permissions: permissions,
  		FileMode:    fileModePermissionBits,
  		Uid:         stat_t.Uid,
  		Gid:         stat_t.Gid,
  	}, nil
  }
docs: // Given the path to a device and it's cgroup_permissions(which cannot be easily queried) look up the information about a linux device and return that information as a Device struct.