activation: add FilesWithNames()

Author: MayCXC

activation/files.go

@@ -0,0 +1,36 @@
+// Copyright 2015 CoreOS, Inc.
+//
+// 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 activation
+
+import "os"
+
+// FilesWithNames maps fd names to a set of os.File pointers.
+func FilesWithNames() map[string][]*os.File {
+	files := Files(true)
+	filesWithNames := map[string][]*os.File{}
+
+	for _, f := range files {
+		current, ok := filesWithNames[f.Name()]
+
+		if !ok {
+			current = []*os.File{}
+			filesWithNames[f.Name()] = current
+		}
+
+		filesWithNames[f.Name()] = append(current, f)
+	}
+
+	return filesWithNames
+}