fixed test to use htpdate

client/site_tests/platform_AccurateTime/platform_AccurateTime.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import logging, math, re, utils
 from autotest_lib.client.bin import site_log_reader, test
 from autotest_lib.client.common_lib import error
 
 class platform_AccurateTime(test.test):
     version = 1
 
 
     def __get_offset(self, string):
-        offset = re.search(r'(-?[\d+\.]+)s', string)
-        if offset is None:
-            # If string is empty, check the sys logs dumped later.
-            raise error.TestError('Unable to find offset in %s' % string)
-        return float(offset.group(1))
-
+        if (string.find('No time correction needed') > -1) :
+            return float(0.0)
+        else :
+            offset = re.search(r'Setting (-?[\d+\.]+) seconds', string)
+            if offset is None:
+                # If string is empty, check the sys logs dumped later.
+                raise error.TestError('Unable to find offset in %s' % string)
+            return float(offset.group(1))
 
     def run_once(self):
         reader = site_log_reader.LogReader()
         reader.set_start_by_current()
         # Check ntpd is currently running
         if utils.system('pgrep ntpd', ignore_status=True) != 0:
             raise error.TestError('NTP server was not already running')
         # Stop it since we cannot force ntp requests unless its not running
         utils.system('initctl stop ntp')
         try:
             # Now grab the current time and get its offset
-            output = utils.system_output('ntpd -g -u ntp:ntp -q',
-                                         retain_output=True)
+            cmd = '/usr/sbin/htpdate -u ntp:ntp -s -t -w www.google.com';
+            output = utils.system_output(cmd,retain_output=True)
             server_offset = self.__get_offset(output)
             logging.info("server time offset: %f" % server_offset)
 
             self.write_perf_keyval({'seconds_offset': abs(server_offset)})
         finally:
             utils.system('initctl start ntp')
             logging.debug('sys logs emitted: %s' % reader.get_logs())