Wrap cluefs part I

frontend/dir.go

@@ -1,10 +1,108 @@
 package frontend
 
 import (
-	//"github.com/rfjakob/gocryptfs/cryptfs"
+	"fmt"
+	"github.com/rfjakob/gocryptfs/cryptfs"
 	"github.com/rfjakob/cluefs/lib/cluefs"
+	"bazil.org/fuse"
+	fusefs "bazil.org/fuse/fs"
+	"golang.org/x/net/context"
 )
 
 type Dir struct {
 	*cluefs.Dir
+	crfs *cryptfs.CryptFS
+}
+
+func NewDir(parent string, name string, fs *FS) *Dir {
+	fmt.Printf("NewDir parent=%s name=%s\n", parent, name)
+	return &Dir {
+		Dir: cluefs.NewDir(parent, name, fs.ClueFS),
+		crfs: fs.CryptFS,
+	}
+}
+
+func (d *Dir) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fusefs.Handle, error) {
+	fmt.Printf("Open\n")
+	h, err := d.Dir.Open(ctx, req, resp)
+	if err != nil {
+		return nil, err
+	}
+	clueDir := h.(*cluefs.Dir)
+
+	return Dir {
+		Dir: clueDir,
+		crfs: d.crfs,
+	}, nil
+}
+
+func (d *Dir) Lookup(ctx context.Context, req *fuse.LookupRequest, resp *fuse.LookupResponse) (fusefs.Node, error) {
+	fmt.Printf("Lookup %s\n", req.Name)
+	req.Name = d.crfs.EncryptPath(req.Name)
+	n, err := d.Dir.Lookup(ctx, req, resp)
+	if err != nil {
+		return nil, err
+	}
+	clueDir, ok := n.(*cluefs.Dir)
+	if ok {
+		return &Dir { Dir: clueDir }, nil
+	} else {
+		clueFile := n.(*cluefs.File)
+		return &File { File: clueFile }, nil
+	}
+}
+
+func (d *Dir) ReadDirAll(ctx context.Context) ([]fuse.Dirent, error) {
+	fmt.Printf("ReadDirAll\n")
+	entries, err := d.Dir.ReadDirAll(ctx)
+	if err != nil {
+		return nil, err
+	}
+	var decrypted []fuse.Dirent
+	for _, e := range entries {
+		if e.Name == "." || e.Name == ".." {
+			decrypted = append(decrypted, e)
+			continue
+		}
+		newName, err := d.crfs.DecryptPath(e.Name)
+		if err != nil {
+			fmt.Printf("ReadDirAll: Error decoding \"%s\": %s\n", e.Name, err.Error())
+			continue
+		}
+		e.Name = newName
+		decrypted = append(decrypted, e)
+	}
+	return decrypted, nil
+}
+
+func (d *Dir) Mkdir(ctx context.Context, req *fuse.MkdirRequest) (fusefs.Node, error) {
+	fmt.Printf("Mkdir %s\n", req.Name)
+	req.Name = d.crfs.EncryptPath(req.Name)
+	n, err := d.Dir.Mkdir(ctx, req)
+	if err != nil {
+		return nil, err
+	}
+	clueDir := n.(*cluefs.Dir)
+	return &Dir {
+		Dir: clueDir,
+		crfs: d.crfs,
+	}, nil
+}
+
+func (d *Dir) Remove(ctx context.Context, req *fuse.RemoveRequest) error {
+	fmt.Printf("Remove\n")
+	req.Name = d.crfs.EncryptPath(req.Name)
+	return d.Dir.Remove(ctx, req)
+}
+
+func (d *Dir) Create(ctx context.Context, req *fuse.CreateRequest, resp *fuse.CreateResponse) (fusefs.Node, fusefs.Handle, error) {
+	fmt.Printf("Create\n")
+	req.Name = d.crfs.EncryptPath(req.Name)
+	n, _, err := d.Dir.Create(ctx, req, resp)
+	if err != nil {
+		return nil, nil, err
+	}
+	clueFile := n.(*cluefs.File)
+	cryptFile := &File {File: clueFile}
+	return cryptFile, cryptFile, nil
 }

frontend/fs.go

@@ -1,13 +1,16 @@
 package frontend
 
 import (
+	"fmt"
 	"github.com/rfjakob/gocryptfs/cryptfs"
 	"github.com/rfjakob/cluefs/lib/cluefs"
+	fusefs "bazil.org/fuse/fs"
 )
 
 type FS struct {
 	*cryptfs.CryptFS
 	*cluefs.ClueFS
+	backing string
 }
 
 type nullTracer struct {}
@@ -23,5 +26,11 @@ func NewFS(key [16]byte, backing string) *FS {
 	return &FS {
 		CryptFS: cryptfs.NewCryptFS(key),
 		ClueFS: clfs,
+		backing: backing,
 	}
 }
+
+func (fs *FS) Root() (fusefs.Node, error) {
+	fmt.Printf("Root\n")
+	return NewDir("", fs.backing, fs), nil
+}

frontend/node.go

@@ -1,9 +1,17 @@
 package frontend
 
 import (
+	"fmt"
 	"github.com/rfjakob/cluefs/lib/cluefs"
 )
 
 type Node struct {
 	*cluefs.Node
 }
+
+func NewNode(parent string, name string, fs *FS) *Node {
+	fmt.Printf("NewNode\n")
+	return &Node{
+		Node: cluefs.NewNode(parent, name, fs.ClueFS),
+	}
+}

main.go

@@ -1,11 +1,18 @@
 package main
 
 import (
+	"bazil.org/fuse"
+	fusefs "bazil.org/fuse/fs"
+	"fmt"
 	"github.com/rfjakob/cluefs/lib/cluefs"
 	"github.com/rfjakob/gocryptfs/frontend"
 	"os"
 )
 
+const (
+	PROGRAM_NAME = "gocryptfs"
+)
+
 func main() {
 	// Parse command line arguments
 	conf, err := cluefs.ParseArguments()
@@ -17,10 +24,31 @@ func main() {
 	var key [16]byte
 	cfs := frontend.NewFS(key, conf.GetShadowDir())
 
-	// Mount and serve file system requests
-	if err = cfs.MountAndServe(conf.GetMountPoint(), conf.GetReadOnly()); err != nil {
-		cluefs.ErrlogMain.Printf("could not mount file system [%s]", err)
-		os.Exit(3)
+	// Mount the file system
+	mountOpts := []fuse.MountOption{
+		fuse.FSName(PROGRAM_NAME),
+		fuse.Subtype(PROGRAM_NAME),
+		fuse.VolumeName(PROGRAM_NAME),
+		fuse.LocalVolume(),
+	}
+	conn, err := fuse.Mount(conf.GetMountPoint(), mountOpts...)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	defer conn.Close()
+
+	// Start serving requests
+	if err = fusefs.Serve(conn, cfs); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	// Check for errors when mounting the file system
+	<-conn.Ready
+	if err = conn.MountError; err != nil {
+		fmt.Println(err)
+		os.Exit(1)
 	}
 
 	// We are done