// Creation mode is read write

	fm := FileMode(0456)
	if runtime.GOOS == "windows" {
		fm = FileMode(0444) // read-only file
	}
	if err := Chmod(f.Name(), fm); err != nil {
		t.Fatalf("chmod %s %#o: %s", f.Name(), fm, err)
	}
	checkMode(t, f.Name(), fm)

	fm = FileMode(0123)
	if runtime.GOOS == "windows" {
		fm = FileMode(0666) // read-write file
	}

	dirMod := time.Unix(123, 0).UTC()
	fileMod := time.Unix(1000000000, 0).UTC()
	fs := fakeFS{
		"/": &fakeFileInfo{
			dir:     true,
			modtime: dirMod,
			ents: []*fakeFileInfo{
				{
					basename: "b",
					modtime:  fileMod,
					contents: contents,
				},
				{
					basename: "a",
					modtime:  fileMod,
					contents: contents,
				},
			},
		},
	}

func (t *tester) makeGOROOTUnwritable() (undo func()) {
	dir := os.Getenv("GOROOT")
	if dir == "" {
		panic("GOROOT not set")
	}

	type pathMode struct {
		path string
		mode os.FileMode
	}
	var dirs []pathMode // in lexical order

	undo = func() {
		for i := range dirs {
			os.Chmod(dirs[i].path, dirs[i].mode) // best effort
		}
	}

	}
	var xl xlMetaV2
	err = xl.LoadOrConvert(buf)
	if err != nil {
		return err
	}
	foundDirs := make(map[string]struct{}, len(xl.versions))
	err = readDirFn(baseDir, func(name string, typ os.FileMode) error {
		if !typ.IsDir() {
			return nil
		}
		// See if directory has a UUID name.
		base := filepath.Base(name)
		_, err := uuid.Parse(base)
		if err == nil {
			foundDirs[base] = struct{}{}

	_ = a.Data() + b.Data()
}
`)
	tg.setenv("GOPATH", tg.path("go"))
	exe := tg.path("p.exe")
	tg.creatingTemp(exe)
	tg.run("build", "-o", exe, "p")
}

func copyFile(src, dst string, perm fs.FileMode) error {
	sf, err := os.Open(src)
	if err != nil {
		return err
	}
	defer sf.Close()

	df, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
	if err != nil {
		return err

        DefaultModelProblemCollector problems = new DefaultModelProblemCollector(result);

        // read and validate raw model
        Model fileModel = readFileModel(request, problems);
        result.setFileModel(fileModel);

        Model activatedFileModel = activateFileModel(fileModel, request, result, problems);
        result.setActivatedFileModel(activatedFileModel);

        if (!request.isTwoPhaseBuilding()) {

        DefaultModelProblemCollector problems = new DefaultModelProblemCollector(result);

        // read and validate raw model
        Model fileModel = readFileModel(request, problems);

        request.setFileModel(fileModel);
        result.setFileModel(fileModel.clone());

        activateFileModel(request, result, problems);

        if (!request.isTwoPhaseBuilding()) {

//sys	CreateNamedPipe(name *uint16, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *SecurityAttributes) (handle Handle, err error)  [failretval==InvalidHandle] = CreateNamedPipeW