X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/18c8fa2337a2db04ee6060184885731f4b5c7d7b..f416c6e0370c78a9aa18c2e461e0861b404a669a:/sdk/go/arvados/fs_filehandle.go

diff --git a/sdk/go/arvados/fs_filehandle.go b/sdk/go/arvados/fs_filehandle.go
index d5865317fb..f50dd4612b 100644
--- a/sdk/go/arvados/fs_filehandle.go
+++ b/sdk/go/arvados/fs_filehandle.go
@@ -1,7 +1,12 @@
+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+
 package arvados
 
 import (
 	"io"
+	"io/fs"
 	"os"
 )
 
@@ -69,15 +74,44 @@ func (f *filehandle) Write(p []byte) (n int, err error) {
 	return
 }
 
+// dirEntry implements fs.DirEntry, see (*filehandle)ReadDir().
+type dirEntry struct {
+	os.FileInfo
+}
+
+func (ent dirEntry) Type() fs.FileMode {
+	return ent.Mode().Type()
+}
+func (ent dirEntry) Info() (fs.FileInfo, error) {
+	return ent, nil
+}
+
+// ReadDir implements fs.ReadDirFile.
+func (f *filehandle) ReadDir(count int) ([]fs.DirEntry, error) {
+	fis, err := f.Readdir(count)
+	if len(fis) == 0 {
+		return nil, err
+	}
+	ents := make([]fs.DirEntry, len(fis))
+	for i, fi := range fis {
+		ents[i] = dirEntry{fi}
+	}
+	return ents, err
+}
+
 func (f *filehandle) Readdir(count int) ([]os.FileInfo, error) {
 	if !f.inode.IsDir() {
 		return nil, ErrInvalidOperation
 	}
 	if count <= 0 {
-		return f.inode.Readdir(), nil
+		return f.inode.Readdir()
 	}
 	if f.unreaddirs == nil {
-		f.unreaddirs = f.inode.Readdir()
+		var err error
+		f.unreaddirs, err = f.inode.Readdir()
+		if err != nil {
+			return nil, err
+		}
 	}
 	if len(f.unreaddirs) == 0 {
 		return nil, io.EOF
@@ -102,3 +136,18 @@ func (f *filehandle) Sync() error {
 	// Sync the containing filesystem.
 	return f.FS().Sync()
 }
+
+func (f *filehandle) Snapshot() (*Subtree, error) {
+	if !f.readable {
+		return nil, ErrInvalidOperation
+	}
+	node, err := f.inode.Snapshot()
+	return &Subtree{inode: node}, err
+}
+
+func (f *filehandle) Splice(r *Subtree) error {
+	if !f.writable {
+		return ErrReadOnlyFile
+	}
+	return f.inode.Splice(r.inode)
+}