Support rewinddir. Untested.

README

@@ -105,8 +105,6 @@ Grep source code for TODO.  Major topics:
 
 * Use splice for transporting data, use io.Reader in API.
 
-* Opendir/Readdir does not support seeking
-
 * Missing support for network FS file locking: FUSE_GETLK, FUSE_SETLK,
   FUSE_SETLKW
 

fuse/direntry.go

@@ -79,16 +79,26 @@ type rawDir interface {
 }
 
 type connectorDir struct {
+	node       FsNode 
 	stream     []DirEntry
+	lastOffset uint64
 }
 
-func (d *connectorDir) ReadDir(input *ReadIn) (*DirEntryList, Status) {
+func (d *connectorDir) ReadDir(input *ReadIn) (list *DirEntryList, code Status) {
 	if d.stream == nil {
 		return nil, OK
 	}
+	// rewinddir() should be as if reopening directory.
+	// TODO - test this.
+	if d.lastOffset > 0 && input.Offset == 0 {
+		d.stream, code = d.node.OpenDir(nil)
+		if !code.Ok() {
+			return nil, code
+		}
+	}
 
 	off := input.Offset
-	list := NewDirEntryList(int(input.Size), off)
+	list = NewDirEntryList(int(input.Size), off)
 
 	todo := d.stream[off:]
 	for _, e := range todo {
@@ -96,6 +106,7 @@ func (d *connectorDir) ReadDir(input *ReadIn) (*DirEntryList, Status) {
 			break
 		}
 	}
+	d.lastOffset = list.offset
 	return list, OK
 }
 

fuse/fsops.go

@@ -114,6 +114,7 @@ func (c *FileSystemConnector) OpenDir(header *raw.InHeader, input *raw.OpenIn) (
 	}
 	stream = append(stream, node.getMountDirEntries()...)
 	de := &connectorDir{
+		node: node.FsNode(),
 		stream: append(stream, DirEntry{S_IFDIR, "."}, DirEntry{S_IFDIR, ".."}),
 	}
 	h, opened := node.mount.registerFileHandle(node, de, nil, input.Flags)