1# Copyright (c) 2011 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# This test isn't really HW specific. It's testing /dev/watchdog API 6# to make sure it works as expected. The most robust implementations is 7# based on real HW but it doesn't have to be. 8 9from __future__ import print_function 10 11import logging 12 13# http://docs.python.org/2/library/errno.html 14import errno 15 16from autotest_lib.client.common_lib import error 17from autotest_lib.server import test 18from autotest_lib.server.cros.watchdog_tester import WatchdogTester 19 20 21class platform_HWwatchdog(test.test): 22 """Test to make sure that /dev/watchdog will reboot the system.""" 23 24 version = 1 25 26 def _stop_watchdog(self, client, wd_dev): 27 # HW watchdog is open and closed "properly". 28 try: 29 client.run('echo "V" > %s' % wd_dev) 30 except error.AutoservRunError as e: 31 raise error.TestError('write to %s failed (%s)' % 32 (wd_dev, errno.errorcode[e.errno])) 33 34 def run_once(self, host=None): 35 tester = WatchdogTester(host) 36 # If watchdog not present, just skip this test 37 if not tester.is_supported(): 38 error.TestNAError('%s or %s not present. Skipping test.' % 39 (tester.WD_DEV, tester.DAISYDOG_PATH)) 40 return 41 42 with tester: 43 self._stop_watchdog(host, tester.WD_DEV) 44 tester.trigger_watchdog() 45