blob: b93b6008e56446422e0a9859ffda6a9eaf3874f8 [file] [log] [blame]
#!/usr/bin/env python
# Copyright (c) 2013 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.
"""Common functionality used by multiple scripts in the perf dashboard.
import os, sys
dirname = os.path.dirname(sys.modules[__name__].__file__)
autotest_dir = os.path.abspath(os.path.join(dirname, '..', '..'))
client_dir = os.path.join(autotest_dir, 'client')
sys.path.insert(0, client_dir)
import setup_modules
setup_modules.setup(base_path=autotest_dir, root_module_name='autotest_lib')
def die_if_already_running(pid_file, logging):
"""Dies if another instance of a given script's pid is already running.
@param pid_file: A string name for a file containing the pid of a running
(or possibly not running) script.
@param logging: A logging.Logger object.
If the specified file contains a pid that is no longer running, or if the
specified file doesn't exist, then writes the currently-running pid to that
if os.path.isfile(pid_file):
existing_pid = None
with open(pid_file, 'r') as fp:
existing_pid = or 'None' # Force 'None' if empty file.
if os.path.isdir('/proc/' + existing_pid):
logging.error('Script already running with pid %s.', existing_pid)
with open(pid_file, 'w') as fp: