1 files changed, 44 insertions, 0 deletions
diff --git a/pkg/shim/runsc/utils.go b/pkg/shim/runsc/utils.go
new file mode 100644
index 000000000..2732d5e98
--- /dev/null
+++ b/pkg/shim/runsc/utils.go
@@ -0,0 +1,44 @@
+// Copyright 2018 The containerd Authors.
+// Copyright 2018 The gVisor 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
+//
+//     https://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 runsc
+
+import (
+	"bytes"
+	"strings"
+	"sync"
+)
+
+var bytesBufferPool = sync.Pool{
+	New: func() interface{} {
+		return bytes.NewBuffer(nil)
+	},
+}
+
+func getBuf() *bytes.Buffer {
+	return bytesBufferPool.Get().(*bytes.Buffer)
+}
+
+func putBuf(b *bytes.Buffer) {
+	b.Reset()
+	bytesBufferPool.Put(b)
+}
+
+// FormatLogPath parses runsc config, and fill in %ID% in the log path.
+func FormatLogPath(id string, config map[string]string) {
+	if path, ok := config["debug-log"]; ok {
+		config["debug-log"] = strings.Replace(path, "%ID%", id, -1)
+	}
+}