docs: def _blkid(fs_type=None):
      '''
      Return available media devices.
  
      :param fs_type: Filter only devices that are formatted by that file system.
      '''
      flt = lambda data: [el for el in data if el.strip()]
      data = dict()
      for dev_meta in flt(os.popen("blkid -o full").read().split(os.linesep)):  # No __salt__ around at this point.
          dev_meta = dev_meta.strip()
          if not dev_meta:
              continue
          device = dev_meta.split(" ")
          dev_name = device.pop(0)[:-1]
          data[dev_name] = dict()
          for k_set in device:
              ks_key, ks_value = [elm.replace('"', '') for elm in k_set.split("=")]
              data[dev_name][ks_key.lower()] = ks_value
  
      if fs_type:
          mounts = _get_mounts(fs_type)
          for device in six.iterkeys(mounts):
              if data.get(device):
                  data[device]['mounts'] = mounts[device]
  
      return data