Golang pathfs.NewDefaultFileSystem函數代碼示例

func TestNonseekable(t *testing.T) {
	fs := &nonseekFs{FileSystem: pathfs.NewDefaultFileSystem()}
	fs.Length = 200 * 1024

	dir, err := ioutil.TempDir("", "go-fuse-cache_test")
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	defer os.RemoveAll(dir)
	nfs := pathfs.NewPathNodeFs(fs, nil)
	state, _, err := nodefs.MountRoot(dir, nfs.Root(), nil)
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	state.SetDebug(VerboseTest())
	defer state.Unmount()

	go state.Serve()

	f, err := os.Open(dir + "/file")
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	defer f.Close()

	b := make([]byte, 200)
	n, err := f.ReadAt(b, 20)
	if err == nil || n > 0 {
		t.Errorf("file was opened nonseekable, but seek successful")
	}
}

func NewStatFS() *StatFS {
	return &StatFS{
		FileSystem: pathfs.NewDefaultFileSystem(),
		entries:    make(map[string]*fuse.Attr),
		dirs:       make(map[string][]fuse.DirEntry),
	}
}

// New initializes a new TagsFs that uses the given AWS client
func New(client *ec2.EC2, instanceID string) *TagsFs {
	return &TagsFs{
		FileSystem: pathfs.NewReadonlyFileSystem(pathfs.NewDefaultFileSystem()),
		Client:     client,
		InstanceID: instanceID,
	}
}

func main() {
	if len(os.Args) != 2 {
		fmt.Println("Usage: %s <mountpath>")
		os.Exit(1)
	}
	root := os.Args[1]

	hfs := &HelloFs{FileSystem: pathfs.NewDefaultFileSystem()}

	nfs := pathfs.NewPathNodeFs(hfs, nil)
	fuseSrv, _, err := nodefs.MountRoot(root, nfs.Root(), nil)
	if err != nil {
		log.Fatal(err)
	}
	go fuseSrv.Serve()
	l, err := net.Listen("tcp", "127.0.0.1:50000")
	if err != nil {
		log.Fatal(err)
	}
	s := grpc.NewServer()
	pb.RegisterPathFSServer(s, server.New(hfs))
	go s.Serve(l)
	log.Printf("Listen on %s for dir %s", l.Addr(), root)
	sigCh := make(chan os.Signal)
	signal.Notify(sigCh, os.Interrupt)
	for range sigCh {
		fuseSrv.Unmount()
		s.Stop()
		os.Exit(0)
	}
}

func defaultReadTest(t *testing.T) (root string, cleanup func()) {
	fs := &DefaultReadFS{
		FileSystem: pathfs.NewDefaultFileSystem(),
		size:       22,
	}

	var err error
	dir, err := ioutil.TempDir("", "go-fuse")
	if err != nil {
		t.Fatalf("TempDir failed: %v", err)
	}
	pathfs := pathfs.NewPathNodeFs(fs, nil)
	opts := nodefs.NewOptions()
	opts.Debug = VerboseTest()

	state, _, err := nodefs.MountRoot(dir, pathfs.Root(), opts)
	if err != nil {
		t.Fatalf("MountNodeFileSystem failed: %v", err)
	}
	go state.Serve()
	if err := state.WaitMount(); err != nil {
		t.Fatal("WaitMount", err)
	}
	return dir, func() {
		state.Unmount()
		os.Remove(dir)
	}
}

func newNotifyFs() *NotifyFs {
	return &NotifyFs{
		FileSystem: pathfs.NewDefaultFileSystem(),
		sizeChan:   make(chan uint64, 1),
		existChan:  make(chan bool, 1),
	}
}

func NewUnionFs(fileSystems []pathfs.FileSystem, options UnionFsOptions) (pathfs.FileSystem, error) {
	g := &unionFS{
		options:     &options,
		fileSystems: fileSystems,
		FileSystem:  pathfs.NewDefaultFileSystem(),
	}

	writable := g.fileSystems[0]
	code := g.createDeletionStore()
	if !code.Ok() {
		return nil, fmt.Errorf("could not create deletion path %v: %v", options.DeletionDirName, code)
	}

	g.deletionCache = newDirCache(writable, options.DeletionDirName, options.DeletionCacheTTL)
	g.branchCache = NewTimedCache(
		func(n string) (interface{}, bool) { return g.getBranchAttrNoCache(n), true },
		options.BranchCacheTTL)

	g.hiddenFiles = make(map[string]bool)
	for _, name := range options.HiddenFiles {
		g.hiddenFiles[name] = true
	}

	return g, nil
}

func New(config *conf.Fuse, logger log_driver.Logger) (*GitFs, error) {
	gitfsDir, err := gitfsDir(logger)
	if err != nil {
		return nil, err
	}

	defaultfs := pathfs.NewDefaultFileSystem()
	gitfs := &GitFs{FileSystem: pathfs.NewReadonlyFileSystem(defaultfs), GitRepoDir: config.GitRepoDir, GitFsDir: gitfsDir, logger: logger}
	fs := pathfs.NewPathNodeFs(gitfs, nil)
	server, _, err := nodefs.MountRoot(gitfsDir, fs.Root(), nil)
	if err != nil {
		logger.Errorf("Failed to mount GitFS on %s due to %s", gitfsDir, err)
		return nil, err
	}
	logger.Debugf("Mount GitFs on %s", gitfsDir)
	gitfs.server = server
	server.SetDebug(config.Debug)

	gitfs.cache, err = cache.New(1024)
	if err != nil {
		logger.Errorf("Failed to initialize object cache due to %s\n", err)
		return nil, err
	}

	return gitfs, nil
}

// New initializes a new MetadataFs that uses the given endpoint as the
// target of metadata requests
func New(endpoint string) *MetadataFs {
	return &MetadataFs{
		FileSystem: pathfs.NewReadonlyFileSystem(pathfs.NewDefaultFileSystem()),
		Client:     &http.Client{},
		Endpoint:   endpoint,
	}
}

func start(dataset string, mount mount) {
	ds, err := spec.GetDataset(dataset)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Could not create dataset: %s\n", err)
		return
	}

	hv, ok := ds.MaybeHeadValue()
	if ok {
		if !types.IsSubtype(fsType, hv.Type()) {
			fmt.Fprintf(os.Stderr, "Invalid dataset head: expected type '%s' but found type '%s'\n", fsType.Desc.(types.StructDesc).Name, hv.Type().Desc.(types.StructDesc).Name)
			return
		}
	} else {
		rootAttr := makeAttr(0777) // create the root directory with maximally permissive permissions
		rootDir := types.NewStructWithType(directoryType, types.ValueSlice{types.NewMap()})
		rootInode := types.NewStructWithType(inodeType, types.ValueSlice{rootAttr, rootDir})
		hv = types.NewStructWithType(fsType, types.ValueSlice{rootInode})
	}

	mount(&nomsFS{
		FileSystem: pathfs.NewDefaultFileSystem(),
		ds:         ds,
		head:       hv.(types.Struct),
		mdLock:     &sync.Mutex{},
		nodes:      make(map[hash.Hash]*nNode),
	})
}

func TestNonseekable(t *testing.T) {
	fs := &nonseekFs{FileSystem: pathfs.NewDefaultFileSystem()}
	fs.Length = 200 * 1024

	dir := testutil.TempDir()
	defer os.RemoveAll(dir)
	nfs := pathfs.NewPathNodeFs(fs, nil)
	opts := nodefs.NewOptions()
	opts.Debug = testutil.VerboseTest()
	state, _, err := nodefs.MountRoot(dir, nfs.Root(), opts)
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	defer state.Unmount()

	go state.Serve()
	if err := state.WaitMount(); err != nil {
		t.Fatal("WaitMount", err)
	}

	f, err := os.Open(dir + "/file")
	if err != nil {
		t.Fatalf("failed: %v", err)
	}
	defer f.Close()

	b := make([]byte, 200)
	n, err := f.ReadAt(b, 20)
	if err == nil || n > 0 {
		t.Errorf("file was opened nonseekable, but seek successful")
	}
}

func NewMultiZipFs() *MultiZipFs {
	m := &MultiZipFs{
		zips:          make(map[string]nodefs.Node),
		dirZipFileMap: make(map[string]string),
		FileSystem:    pathfs.NewDefaultFileSystem(),
	}
	return m
}

func NewDriver(basepath, etcdendpoint string) dkvolume.Driver {
	e := etcDriver{
		etcdbackend: etcdfs.EtcdFs{FileSystem: pathfs.NewDefaultFileSystem(), EtcdEndpoint: etcdendpoint},
		mountpoints: make(map[string]*etcdFuseServer),
		basePath:    basepath,
	}
	return &e
}

// NewKeywhizFs readies a KeywhizFs struct and its parent filesystem objects.
func NewFs(client *api.Client, owner keywhizfs.Ownership) (*fs, nodefs.Node) {
	defaultfs := pathfs.NewDefaultFileSystem()            // Returns ENOSYS by default
	readonlyfs := pathfs.NewReadonlyFileSystem(defaultfs) // R/W calls return EPERM

	kwfs := &fs{readonlyfs, client, owner}
	nfs := pathfs.NewPathNodeFs(kwfs, nil)
	nfs.SetDebug(true)
	return kwfs, nfs.Root()
}

func MountFs(path string) {
	LoadSession()
	CacheInit()
	nfs := pathfs.NewPathNodeFs(&DropboxFs{FileSystem: pathfs.NewDefaultFileSystem()}, nil)
	server, _, err := nodefs.MountRoot(path, nfs.Root(), nil)
	if err != nil {
		log.Fatalf("Mount fail: %v\n", err)
	}
	server.Serve()
}