// 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

	case flowcontrol.SubjectKindGroup:
		if subject.Group == nil {
			return false
		}
		seek := subject.Group.Name
		if seek == "*" {
			return true
		}
		for _, userGroup := range user.GetGroups() {
			if userGroup == seek {
				return true
			}
		}
		return false
	case flowcontrol.SubjectKindServiceAccount:
		if subject.ServiceAccount == nil {
			return false

    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();

// what gccgo does; gccgo concatenates together all the export data
// for all the objects in the file.  In practice that case does not arise.
func arExportData(archive io.ReadSeeker) (io.ReadSeeker, error) {
	if _, err := archive.Seek(0, io.SeekStart); err != nil {
		return nil, err
	}

	var buf [len(armag)]byte
	if _, err := archive.Read(buf[:]); err != nil {
		return nil, err
	}

	switch string(buf[:]) {
	case armag:

				}
			}
		}
	}
}

func TestSeekFailure(t *testing.T) {
	_, err := syscall.Seek(-1, 0, io.SeekStart)
	if err == nil {
		t.Fatalf("Seek(-1, 0, 0) did not fail")
	}
	str := err.Error() // used to crash on Linux
	t.Logf("Seek: %v", str)
	if str == "" {
		t.Fatalf("Seek(-1, 0, 0) return error with empty message")
	}
}

func TestSetsockoptString(t *testing.T) {

//go:build linux && gc && 386

package unix

import "syscall"

// Underlying system call writes to newoffset via pointer.
// Implemented in assembly to avoid allocation.
func seek(fd int, offset int64, whence int) (newoffset int64, err syscall.Errno)

func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err syscall.Errno)

        dataOutput.flush();

        lockFileAccess.seek(REGION_START);
        lockFileAccess.write(outstr.toByteArray());
        assert lockFileAccess.getFilePointer() == stateRegionSize;
    }

    public LockState readState(RandomAccessFile lockFileAccess) throws IOException {
        try {
            byte[] buffer = new byte[stateRegionSize];
            lockFileAccess.seek(REGION_START);

            int readPos = 0;

}

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 {