fuse: Handle sockets/fifos/devs correctly

Closes #1463

internal/fuse/dir.go

@@ -185,6 +185,8 @@ func (d *dir) Lookup(ctx context.Context, name string) (fs.Node, error) {
 		return newFile(ctx, d.root, fs.GenerateDynamicInode(d.inode, name), node)
 	case "symlink":
 		return newLink(ctx, d.root, fs.GenerateDynamicInode(d.inode, name), node)
+	case "dev", "chardev", "fifo", "socket":
+		return newOther(ctx, d.root, fs.GenerateDynamicInode(d.inode, name), node)
 	default:
 		debug.Log("  node %v has unknown type %v", name, node.Type)
 		return nil, fuse.ENOENT

internal/fuse/other.go

@@ -0,0 +1,41 @@
+// +build !openbsd
+// +build !windows
+
+package fuse
+
+import (
+	"bazil.org/fuse"
+	"github.com/restic/restic/internal/restic"
+	"golang.org/x/net/context"
+)
+
+type other struct {
+	root  *Root
+	node  *restic.Node
+	inode uint64
+}
+
+func newOther(ctx context.Context, root *Root, inode uint64, node *restic.Node) (*other, error) {
+	return &other{root: root, inode: inode, node: node}, nil
+}
+
+func (l *other) Readlink(ctx context.Context, req *fuse.ReadlinkRequest) (string, error) {
+	return l.node.LinkTarget, nil
+}
+
+func (l *other) Attr(ctx context.Context, a *fuse.Attr) error {
+	a.Inode = l.inode
+	a.Mode = l.node.Mode
+
+	if !l.root.cfg.OwnerIsRoot {
+		a.Uid = l.node.UID
+		a.Gid = l.node.GID
+	}
+	a.Atime = l.node.AccessTime
+	a.Ctime = l.node.ChangeTime
+	a.Mtime = l.node.ModTime
+
+	a.Nlink = uint32(l.node.Links)
+
+	return nil
+}