Drop the util package.

pkg/fs/realfile.go

@@ -0,0 +1,49 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package fs
+
+import (
+	"errors"
+	"os"
+)
+
+var _ File = &realFile{}
+
+// realFile implements File using the local filesystem.
+type realFile struct {
+	file *os.File
+}
+
+// MakeRealFile makes an instance of realFile.
+func MakeRealFile(f *os.File) (File, error) {
+	if f == nil {
+		return nil, errors.New("file argument may not be nil")
+	}
+	return &realFile{file: f}, nil
+}
+
+// Close closes a file.
+func (f *realFile) Close() error { return f.file.Close() }
+
+// Read reads a file's content.
+func (f *realFile) Read(p []byte) (n int, err error) { return f.file.Read(p) }
+
+// Write writes bytes to a file
+func (f *realFile) Write(p []byte) (n int, err error) { return f.file.Write(p) }
+
+// Stat returns an interface which has all the information regarding the file.
+func (f *realFile) Stat() (os.FileInfo, error) { return f.file.Stat() }