1 files changed, 43 insertions, 0 deletions
diff --git a/pkg/sentry/fs/seek.go b/pkg/sentry/fs/seek.go
new file mode 100644
index 000000000..0f43918ad
--- /dev/null
+++ b/pkg/sentry/fs/seek.go
@@ -0,0 +1,43 @@
+// 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
+//
+//     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
+
+// SeekWhence determines seek direction.
+type SeekWhence int
+
+const (
+	// SeekSet sets the absolute offset.
+	SeekSet SeekWhence = iota
+
+	// SeekCurrent sets relative to the current position.
+	SeekCurrent
+
+	// SeekEnd sets relative to the end of the file.
+	SeekEnd
+)
+
+// String returns a human readable string for whence.
+func (s SeekWhence) String() string {
+	switch s {
+	case SeekSet:
+		return "Set"
+	case SeekCurrent:
+		return "Current"
+	case SeekEnd:
+		return "End"
+	default:
+		return "Unknown"
+	}
+}