static final int O_RDWR = 0x03;
    static final int O_APPEND = 0x04;

    // Open Function Encoding
    // create if the file does not exist
    static final int O_CREAT = 0x0010;
    // fail if the file exists
    static final int O_EXCL = 0x0020;
    // truncate if the file exists
    static final int O_TRUNC = 0x0040;

    // share access
    /**

                try (SmbFileHandleImpl f = openUnshared(O_RDONLY, FILE_WRITE_ATTRIBUTES, FILE_SHARE_READ | FILE_SHARE_WRITE, dir,
                        dir != 0 ? 0x0001 : 0x0040)) {
                    th.send(new Trans2SetFileInformation(th.getConfig(), f.getFid(), attrs | dir, ctime, mtime, atime),
                            new Trans2SetFileInformationResponse(th.getConfig()), RequestParam.NO_RETRY);