.

wcfs/__init__.py

@@ -120,7 +120,7 @@ def join(zurl, autostart=_default_autostart()):
         raise RuntimeError("wcfs: join %s: server not started" % zurl)
 
     # start wcfs with telling it to automatically exit when there is no client activity.
-    return _start(zurl, "-autoexit")
+    return _start(zurl, "-autoexit", '-d')
 
 
 # _start starts wcfs server for ZODB @ zurl.

wcfs/misc.go

@@ -38,31 +38,42 @@ func asctx(fctx *fuse.Context) context.Context {
 	return context.Background()
 }
 
-// StaticFile is a Node for file with static data.
-type StaticFile struct {
+
+// NewStaticFile creates nodefs.Node for file with static data.
+func NewStaticFile(data []byte) *SmallFile {
+	return NewSmallFile(func() []byte {
+		return data
+	})
+}
+
+// SmallFile is a nodefs.Node for file with dynamic, but always small, data.
+type SmallFile struct {
 	nodefs.Node
 
-	data []byte
+	// readData gives whole file data
+	readData func() []byte
 }
 
-func NewStaticFile(data []byte) *StaticFile {
-	return &StaticFile{Node: nodefs.NewDefaultNode(), data: data}
+func NewSmallFile(readData func() []byte) *SmallFile {
+	return &SmallFile{Node: nodefs.NewDefaultNode(), readData: readData}
 }
 
-func (f *StaticFile) GetAttr(out *fuse.Attr, _ nodefs.File, _ *fuse.Context) fuse.Status {
-	out.Size = uint64(len(f.data))
+func (f *SmallFile) GetAttr(out *fuse.Attr, _ nodefs.File, _ *fuse.Context) fuse.Status {
+	data := f.readData()
+	out.Size = uint64(len(data))
 	out.Mode = fuse.S_IFREG | 0644
 	return fuse.OK
 }
 
-func (f *StaticFile) Read(_ nodefs.File, dest []byte, off int64, _ *fuse.Context) (fuse.ReadResult, fuse.Status) {
-	l := int64(len(f.data))
+func (f *SmallFile) Read(_ nodefs.File, dest []byte, off int64, _ *fuse.Context) (fuse.ReadResult, fuse.Status) {
+	data := f.readData()
+	l := int64(len(data))
 	end := off + l
 	if end > l {
 		end = l
 	}
 
-	return fuse.ReadResultData(f.data[off:end]), fuse.OK
+	return fuse.ReadResultData(data[off:end]), fuse.OK
 }