this.handshake = null
    }

    if (requestLine.isNotEmpty()) {
      val methodEnd = requestLine.indexOf(' ')
      val pathEnd = requestLine.indexOf(' ', methodEnd + 1)
      this.method = requestLine.substring(0, methodEnd)
      var path = requestLine.substring(methodEnd + 1, pathEnd)
      if (!path.startsWith("/")) {
        path = "/"
      }
      this.path = path

    }

    if (requestLine.isNotEmpty()) {
      val methodEnd = requestLine.indexOf(' ')
      val pathEnd = requestLine.indexOf(' ', methodEnd + 1)
      this.method = requestLine.substring(0, methodEnd)
      var path = requestLine.substring(methodEnd + 1, pathEnd)
      if (!path.startsWith("/")) {
        path = "/"
      }
      this.path = path

		pathErr = &os.PathError{Err: syscall.ENOTEMPTY}
		ok = isSysErrNotEmpty(pathErr)
		if !ok {
			t.Fatalf("Unexpected error expecting %s", syscall.ENOTEMPTY)
		}
	} else {
		pathErr = &os.PathError{Err: syscall.Errno(0x91)}
		ok = isSysErrNotEmpty(pathErr)
		if !ok {
			t.Fatal("Unexpected error expecting 0x91")
		}
	}
	if runtime.GOOS == globalWindowsOSName {
		pathErr = &os.PathError{Err: syscall.Errno(0x03)}

func isSysErrPathNotFound(err error) bool {
	if runtime.GOOS != globalWindowsOSName {
		var pathErr *os.PathError
		if errors.As(err, &pathErr) {
			return pathErr.Err == syscall.ENOENT
		}
		return false
	}
	var pathErr *os.PathError
	if errors.As(err, &pathErr) {
		var errno syscall.Errno
		if errors.As(pathErr.Err, &errno) {
			// ERROR_PATH_NOT_FOUND
			return errno == 0x03
		}
	}
	return false
}

    var pos = 0
    val limit = header.length
    var pairEnd: Int
    while (pos < limit) {
      pairEnd = header.delimiterOffset(";,", pos, limit)
      val equalsSign = header.delimiterOffset('=', pos, pairEnd)
      val name = header.trimSubstring(pos, equalsSign)
      if (name.startsWith("$")) {
        pos = pairEnd + 1
        continue
      }

      // We have either name=value or just a name.

		return nil
	}
	if err != nil {
		return err
	}
	defer parent.Close()

	if err := removeAllFrom(parent, base); err != nil {
		if pathErr, ok := err.(*PathError); ok {
			pathErr.Path = parentDir + string(PathSeparator) + pathErr.Path
			err = pathErr
		}
		return err
	}
	return nil
}

func removeAllFrom(parent *File, base string) error {
	parentFd := int(parent.Fd())

func (d *flexVolumeDetacher) UnmountDevice(deviceMountPath string) error {

	pathExists, pathErr := mount.PathExists(deviceMountPath)
	if !pathExists {
		klog.Warningf("Warning: Unmount skipped because path does not exist: %v", deviceMountPath)
		return nil
	}
	if pathErr != nil && !mount.IsCorruptedMnt(pathErr) {
		return fmt.Errorf("error checking path: %w", pathErr)
	}

	path := f.GetPath()
	return f.TearDownAt(path)
}

func (f *flexVolumeUnmounter) TearDownAt(dir string) error {
	pathExists, pathErr := mount.PathExists(dir)
	if pathErr != nil {
		// only log warning here since plugins should anyways have to deal with errors
		klog.Warningf("Error checking path: %v", pathErr)
	} else {
		if !pathExists {
			klog.Warningf("Warning: Unmount skipped because path does not exist: %v", dir)
			return nil
		}

	const dir = "/_go_os_test/dir"
	err := MkdirAll(dir, 0777)
	if err != nil {
		pathErr, ok := err.(*PathError)
		// common for users not to be able to write to /
		if ok && (pathErr.Err == syscall.EACCES || isReadonlyError(pathErr.Err)) {
			t.Skipf("could not create %v: %v", dir, err)
		}
		t.Fatalf(`MkdirAll "/_go_os_test/dir": %v, %s`, err, pathErr.Err)
	}
	RemoveAll("/_go_os_test")

func LookPath(file string) (string, error) {
	return lookPath(file, pathExt())
}

// lookExtensions finds windows executable by its dir and path.
// It uses LookPath to try appropriate extensions.
// lookExtensions does not search PATH, instead it converts `prog` into `.\prog`.
//
// If the path already has an extension found in PATHEXT,
// lookExtensions returns it directly without searching