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#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Sets environment variables needed to run a chromium unit test."""
import os
import stat
import subprocess
import sys
# This is hardcoded to be src/ relative to this script.
ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
CHROME_SANDBOX_ENV = 'CHROME_DEVEL_SANDBOX'
CHROME_SANDBOX_PATH = '/opt/chromium/chrome_sandbox'
def should_enable_sandbox(sandbox_path):
"""Return a boolean indicating that the current slave is capable of using the
sandbox and should enable it. This should return True iff the slave is a
Linux host with the sandbox file present and configured correctly."""
if not (sys.platform.startswith('linux') and
os.path.exists(sandbox_path)):
return False
sandbox_stat = os.stat(sandbox_path)
if ((sandbox_stat.st_mode & stat.S_ISUID) and
(sandbox_stat.st_mode & stat.S_IRUSR) and
(sandbox_stat.st_mode & stat.S_IXUSR) and
(sandbox_stat.st_uid == 0)):
return True
return False
def enable_sandbox_if_required(env, verbose=False):
"""Checks enables the sandbox if it is required, otherwise it disables it."""
chrome_sandbox_path = env.get(CHROME_SANDBOX_ENV, CHROME_SANDBOX_PATH)
if should_enable_sandbox(chrome_sandbox_path):
if verbose:
print 'Enabling sandbox. Setting environment variable:'
print ' %s="%s"' % (CHROME_SANDBOX_ENV, chrome_sandbox_path)
env[CHROME_SANDBOX_ENV] = chrome_sandbox_path
else:
if verbose:
print 'Sandbox not properly installed. Unsetting:'
print ' %s' % CHROME_SANDBOX_ENV
# The variable should be removed from the environment, making
# the variable empty silently disables the sandbox.
if env.get(CHROME_SANDBOX_ENV):
env.pop(CHROME_SANDBOX_ENV)
def fix_python_path(cmd):
"""Returns the fixed command line to call the right python executable."""
out = cmd[:]
if out[0] == 'python':
out[0] = sys.executable
elif out[0].endswith('.py'):
out.insert(0, sys.executable)
return out
def run_executable(cmd, env):
"""Runs an executable with:
- environment variable CR_SOURCE_ROOT set to the root directory.
- environment variable LANGUAGE to en_US.UTF-8.
- environment variable CHROME_DEVEL_SANDBOX set if need
- Reuses sys.executable automatically.
"""
# Many tests assume a English interface...
env['LANG'] = 'en_US.UTF-8'
# Used by base/base_paths_linux.cc as an override. Just make sure the default
# logic is used.
env.pop('CR_SOURCE_ROOT', None)
enable_sandbox_if_required(env)
# Ensure paths are correctly separated on windows.
cmd[0] = cmd[0].replace('/', os.path.sep)
cmd = fix_python_path(cmd)
try:
return subprocess.call(cmd, env=env)
except OSError:
print >> sys.stderr, 'Failed to start %s' % cmd
raise
def main():
return run_executable(sys.argv[1:], os.environ.copy())
if __name__ == '__main__':
sys.exit(main())
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