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      1 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 import glob, logging, os
      6 
      7 from autotest_lib.client.bin import test, utils
      8 from autotest_lib.client.common_lib import error
      9 
     10 class hardware_MultiReader(test.test):
     11     version = 1
     12 
     13     def run_once(self):
     14         blockdev_paths = glob.glob("/sys/block/*/removable")
     15         for path in blockdev_paths:
     16             removable = utils.read_one_line(path)
     17             if removable == "1":
     18                 logging.info("Found removable block device %s",
     19                              os.path.dirname(path))
     20                 return True
     21 
     22         raise error.TestFail("No removable block devices are seen.")
     23