Add PrefixFileSystem.

fuse/Makefile

@@ -25,6 +25,7 @@ MANUAL_GOFILES=api.go \
 	mount.go \
 	mountstate.go \
 	opcode.go \
+	prefixfs.go \
 	pathfs.go \
 	fsops.go \
 	readonlyfs.go \

fuse/prefixfs.go

+package fuse
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// PrefixFileSystem adds a path prefix to incoming calls. 
+type PrefixFileSystem struct {
+	FileSystem
+	Prefix string
+}
+
+func (me *PrefixFileSystem) prefixed(n string) string {
+	return filepath.Join(me.Prefix, n)
+} 
+
+func (me *PrefixFileSystem) GetAttr(name string, context *Context) (*os.FileInfo, Status) {
+	return me.FileSystem.GetAttr(me.prefixed(name), context)
+}
+
+func (me *PrefixFileSystem) Readlink(name string, context *Context) (string, Status) {
+	return me.FileSystem.Readlink(me.prefixed(name), context)
+}
+
+func (me *PrefixFileSystem) Mknod(name string, mode uint32, dev uint32, context *Context) Status {
+	return me.FileSystem.Mknod(me.prefixed(name), mode, dev, context)
+}
+
+func (me *PrefixFileSystem) Mkdir(name string, mode uint32, context *Context) Status {
+	return me.FileSystem.Mkdir(me.prefixed(name), mode, context)
+}
+
+func (me *PrefixFileSystem) Unlink(name string, context *Context) (code Status) {
+	return me.FileSystem.Unlink(me.prefixed(name), context)
+}
+
+func (me *PrefixFileSystem) Rmdir(name string, context *Context) (code Status) {
+	return me.FileSystem.Rmdir(me.prefixed(name), context)
+}
+
+func (me *PrefixFileSystem) Symlink(value string, linkName string, context *Context) (code Status) {
+	return me.FileSystem.Symlink(value, me.prefixed(linkName), context)
+}
+
+func (me *PrefixFileSystem) Rename(oldName string, newName string, context *Context) (code Status) {
+	return me.FileSystem.Rename(me.prefixed(oldName), me.prefixed(newName), context)
+}
+
+func (me *PrefixFileSystem) Link(oldName string, newName string, context *Context) (code Status) {
+	return me.FileSystem.Link(me.prefixed(oldName), me.prefixed(newName), context)
+}
+
+func (me *PrefixFileSystem) Chmod(name string, mode uint32, context *Context) (code Status) {
+	return me.FileSystem.Chmod(me.prefixed(name), mode, context)
+}
+
+func (me *PrefixFileSystem) Chown(name string, uid uint32, gid uint32, context *Context) (code Status) {
+	return me.FileSystem.Chown(me.prefixed(name), uid, gid, context)
+}
+
+func (me *PrefixFileSystem) Truncate(name string, offset uint64, context *Context) (code Status) {
+	return me.FileSystem.Truncate(me.prefixed(name), offset, context)
+}
+
+func (me *PrefixFileSystem) Open(name string, flags uint32, context *Context) (file File, code Status) {
+	return me.FileSystem.Open(me.prefixed(name), flags, context)
+}
+
+func (me *PrefixFileSystem) OpenDir(name string, context *Context) (stream chan DirEntry, status Status) {
+	return me.FileSystem.OpenDir(me.prefixed(name), context)
+}
+
+func (me *PrefixFileSystem) OnMount(nodeFs *PathNodeFs) {
+	me.FileSystem.OnMount(nodeFs)
+}
+
+func (me *PrefixFileSystem) OnUnmount() {
+	me.FileSystem.OnUnmount()
+}
+
+func (me *PrefixFileSystem) Access(name string, mode uint32, context *Context) (code Status) {
+	return me.FileSystem.Access(me.prefixed(name), mode, context)
+}
+
+func (me *PrefixFileSystem) Create(name string, flags uint32, mode uint32, context *Context) (file File, code Status) {
+	return me.FileSystem.Create(me.prefixed(name), flags, mode, context)
+}
+
+func (me *PrefixFileSystem) Utimens(name string, AtimeNs uint64, CtimeNs uint64, context *Context) (code Status) {
+	return me.FileSystem.Utimens(me.prefixed(name), AtimeNs, CtimeNs, context)
+}
+
+func (me *PrefixFileSystem) GetXAttr(name string, attr string, context *Context) ([]byte, Status) {
+	return me.FileSystem.GetXAttr(me.prefixed(name), attr, context)
+}
+
+func (me *PrefixFileSystem) SetXAttr(name string, attr string, data []byte, flags int, context *Context) Status {
+	return me.FileSystem.SetXAttr(me.prefixed(name), attr, data, flags, context)
+}
+
+func (me *PrefixFileSystem) ListXAttr(name string, context *Context) ([]string, Status) {
+	return me.FileSystem.ListXAttr(me.prefixed(name), context)
+}
+
+func (me *PrefixFileSystem) RemoveXAttr(name string, attr string, context *Context) Status {
+	return me.FileSystem.RemoveXAttr(me.prefixed(name), attr, context)
+}
+
+func (me *PrefixFileSystem) String() string {
+	return fmt.Sprintf("PrefixFileSystem(%s,%s)", me.FileSystem.String(), me.Prefix)
+}