docs: def file_rights(filepath, mode=None, uid=None, gid=None):
      '''
          Change file rights
      '''
      file_handle = os.open(filepath, os.O_RDONLY)
      if mode:
          os.fchmod(file_handle, mode)
      if uid:
          if not gid:
              gid = 0
          os.fchown(file_handle, uid, gid)
      os.close(file_handle)