/**
     * Get file details using the MLST command
     *
     * @param pathname the file or directory to list, may be {@code null}
     * @return the file details, may be {@code null}
     * @throws IOException on error
     * @since 3.0
     */
    public FTPFile mlistFile(String pathname) throws IOException
    {
        boolean success = FTPReply.isPositiveCompletion(sendCommand(FTPCmd.MLST, pathname));
        if (success){
            String reply = getReplyStrings()[1]; //5:check
            /* check the response makes sense.
             * Must have space before fact(s) and between fact(s) and filename
             * Fact(s) can be absent, so at least 3 chars are needed.
             */
            if (reply.length() < 3 || reply.charAt(0) != ‘ ‘) {
                throw new MalformedServerReplyException("Invalid server reply (MLST): ‘" + reply + "‘");
            }
            String entry = reply.substring(1); // skip leading space for parser
            return MLSxEntryParser.parseEntry(entry);
        } else {
            return null;
        }
    }