def mlsd(conn, path="", facts=None):
    """
    
    """
    facts = facts or []
    if facts:
        conn.sendcmd("OPTS MLST " + ";".join(facts) + ";")
    if path:
        cmd = "MLSD %s" % path
    else:
        cmd = "MLSD"
    lines = []
    conn.retrlines(cmd, lines.append)
    for line in lines:
        facts_found, _, name = line.rstrip(ftplib.CRLF).partition(' ')
        entry = {}
        for fact in facts_found[:-1].split(";"):
            key, _, value = fact.partition("=")
            entry[key.lower()] = value
        yield (name, entry)