def start_daemon(pidfile, process, stdout=None, stderr=None, **kwargs):
if pidfile:
pidfile = PIDLockFile(pidfile)
try:
pidfile.acquire(timeout=1.0)
pidfile.release()
except LockFailed:
raise
else:
pidfile = None
stdout = stdout or sys.stdout
stderr = stderr or sys.stderr
with DaemonContext(pidfile=pidfile, stdout=stdout, stderr=stderr, **kwargs):
process.start()
