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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def disable(name, stop=False, **kwargs):
    '''
    Don't start service ``name`` at boot
    Returns ``True`` if operation is successful

    name
        the service's name

    stop
        if True, also stops the service

    CLI Example:

    .. code-block:: bash

        salt '*' service.disable <name> [stop=True]
    '''

    # non-existent as registrered service
    if not enabled(name):
        return False

    # down_file: file that prevent sv autostart
    svc_realpath = _get_svc_path(name)[0]
    down_file = os.path.join(svc_realpath, 'down')

    if stop:
        stop(name)

    if not os.path.exists(down_file):
        try:
            salt.utils.files.fopen(down_file, "w").close()  # pylint: disable=resource-leakage
        except IOError:
            log.error('Unable to create file %s', down_file)
            return False

    return True