def METHOD_NAME(args):
    import argparse
    parser = argparse.ArgumentParser(description='Fix-up all C sources and headers - add/update copyright header, include guards, etc.', prog=args[0])
    add_common_args(parser)
    pargs = parser.parse_args(args[1:])
    j = Janitor(pargs.rootdir / 'src')
    with ThreadPoolExecutor() as ex:
        tuple(ex.map(j.do_maintenance, j.iter_files()))