Initial commit

1 files changed, 56 insertions, 0 deletions

diff --git a/pkg/go-runsc/utils.go b/pkg/go-runsc/utils.go
new file mode 100644
index 000000000..c78d0c162
--- /dev/null
+++ b/pkg/go-runsc/utils.go
@@ -0,0 +1,56 @@
+/*
+Copyright The containerd Authors.
+Copyright 2018 Google LLC
+
+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.
+// * For debug-log, it fills in the id in place;
+// * For user-log, it fills in the id, returns the user log path, and deletes
+// the `user-log` entry from the config, because it will only be added to runsc
+// calls that create a new sandbox.
+func FormatLogPath(id string, config map[string]string) string {
+	if path, ok := config["debug-log"]; ok {
+		config["debug-log"] = strings.Replace(path, "%ID%", id, -1)
+	}
+	var userLog string
+	if path, ok := config["user-log"]; ok {
+		userLog = strings.Replace(path, "%ID%", id, -1)
+		delete(config, "user-log")
+	}
+	return userLog
+}