Return True if the sysv (or chkconfig) service is enabled for the specified
    runlevel; otherwise return False.  If `runlevel` is None, then use the
    current runlevel.

def _sysv_is_enabled(name, runlevel=None):
    '''
    Return True if the sysv (or chkconfig) service is enabled for the specified
    runlevel; otherwise return False.  If `runlevel` is None, then use the
    current runlevel.
    '''
    # Try chkconfig first.
    result = _chkconfig_is_enabled(name, runlevel)
    if result:
        return True

    if runlevel is None:
        runlevel = _runlevel()
    return (
        len(glob.glob('/etc/rc.d/rc{0}.d/S??{1}'.format(runlevel, name))) > 0)