o := &fd.wop
	o.handle = src

	// TODO(brainman): skip calling syscall.Seek if OS allows it
	curpos, err := syscall.Seek(o.handle, 0, io.SeekCurrent)
	if err != nil {
		return 0, err
	}

	if n <= 0 { // We don't know the size of the file so infer it.
		// Find the number of bytes offset from curpos until the end of the file.
		n, err = syscall.Seek(o.handle, -curpos, io.SeekEnd)
		if err != nil {
			return
		}

	// a bit brittle but cannot be addressed without a large change of the
	// algorithm in the os.(*File).readdir method.
	return n - len(b), nil
}

// Seek wraps syscall.Seek.
func (fd *FD) Seek(offset int64, whence int) (int64, error) {
	if err := fd.incref(); err != nil {
		return 0, err
	}
	defer fd.decref()
	// syscall.Filetype is a uint8 but we store it as a uint32 in SysFile in

	// of the file -- if you pass it offset 0, it starts from
	// offset 0. There's no way to tell it "start from current
	// position", so we have to manage that explicitly.
	pos, err := f.Seek(0, io.SeekCurrent)
	if err != nil {
		return 0, err, false
	}

	sc, err := f.SyscallConn()
	if err != nil {
		return 0, nil, false
	}

	var werr error
	err = sc.Read(func(fd uintptr) bool {

    options:
        members:
            - file
            - filename
            - size
            - headers
            - content_type
            - read
            - write
            - seek

    public LockInfo readLockInfo(RandomAccessFile lockFileAccess) throws IOException {
        if (lockFileAccess.length() <= infoRegionPos) {
            return new LockInfo();
        } else {
            lockFileAccess.seek(infoRegionPos);

            DataInputStream inputStream = new DataInputStream(new BufferedInputStream(new RandomAccessFileInputStream(lockFileAccess)));
            byte protocolVersion = inputStream.readByte();

}

func (cfw *CoverageDataWriter) patchSegmentHeader(ws *slicewriter.WriteSeeker) error {
	// record position
	off, err := ws.Seek(0, io.SeekCurrent)
	if err != nil {
		return fmt.Errorf("error seeking in patchSegmentHeader: %v", err)
	}
	// seek back to start so that we can update the segment header
	if _, err := ws.Seek(0, io.SeekStart); err != nil {
		return fmt.Errorf("error seeking in patchSegmentHeader: %v", err)
	}
	if cfw.debug {

    private final RandomAccessFile file;

    public RandomAccessFileInputStream(RandomAccessFile file) {
        this.file = file;
    }

    @Override
    public long skip(long n) throws IOException {
        file.seek(file.getFilePointer() + n);
        return n;
    }

    @Override
    public int read(byte[] bytes) throws IOException {
        return file.read(bytes);
    }

    @Override

	defer f.Close()
	fi, err := f.Stat()
	if err != nil {
		return nil, false, err
	}
	size := fi.Size()
	if size == 0 {
		return nil, false, nil
	}
	if size < max {
		max = size
	}
	offset, err := f.Seek(-max, io.SeekEnd)
	if err != nil {
		return nil, false, err
	}
	data, err := io.ReadAll(f)
	return data, offset > 0, err

//	}
func decode(msg []byte, strict bool) (*Counter, error) {
	counter := &Counter{}
	reader := bytes.NewReader(msg)
	// skip the first 4 bytes (netfilter generic message).
	if _, err := reader.Seek(nl.SizeofNfgenmsg, io.SeekCurrent); err != nil {
		return nil, err
	}

	// attrsProcessed tracks the number of processed attributes.
	var attrsProcessed int

	// length and type of netlink attribute.

    }

    /**
     * Starts reading from the given offset.
     */
    public DataInputStream start(long offset) throws IOException {
        file.seek(offset);
        bufferedInputStream.clear();
        countingInputStream = new CountingInputStream(bufferedInputStream);
        return new DataInputStream(countingInputStream);
    }

    /**