1 files changed, 96 insertions, 0 deletions
diff --git a/pkg/sentry/strace/open.go b/pkg/sentry/strace/open.go
new file mode 100644
index 000000000..140727b02
--- /dev/null
+++ b/pkg/sentry/strace/open.go
@@ -0,0 +1,96 @@
+// 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 strace
+
+import (
+	"syscall"
+
+	"gvisor.googlesource.com/gvisor/pkg/abi"
+)
+
+// OpenMode represents the mode to open(2) a file.
+var OpenMode = abi.ValueSet{
+	syscall.O_RDWR:   "O_RDWR",
+	syscall.O_WRONLY: "O_WRONLY",
+	syscall.O_RDONLY: "O_RDONLY",
+}
+
+// OpenFlagSet is the set of open(2) flags.
+var OpenFlagSet = abi.FlagSet{
+	{
+		Flag: syscall.O_APPEND,
+		Name: "O_APPEND",
+	},
+	{
+		Flag: syscall.O_ASYNC,
+		Name: "O_ASYNC",
+	},
+	{
+		Flag: syscall.O_CLOEXEC,
+		Name: "O_CLOEXEC",
+	},
+	{
+		Flag: syscall.O_CREAT,
+		Name: "O_CREAT",
+	},
+	{
+		Flag: syscall.O_DIRECT,
+		Name: "O_DIRECT",
+	},
+	{
+		Flag: syscall.O_DIRECTORY,
+		Name: "O_DIRECTORY",
+	},
+	{
+		Flag: syscall.O_EXCL,
+		Name: "O_EXCL",
+	},
+	{
+		Flag: syscall.O_NOATIME,
+		Name: "O_NOATIME",
+	},
+	{
+		Flag: syscall.O_NOCTTY,
+		Name: "O_NOCTTY",
+	},
+	{
+		Flag: syscall.O_NOFOLLOW,
+		Name: "O_NOFOLLOW",
+	},
+	{
+		Flag: syscall.O_NONBLOCK,
+		Name: "O_NONBLOCK",
+	},
+	{
+		Flag: 0x200000, // O_PATH
+		Name: "O_PATH",
+	},
+	{
+		Flag: syscall.O_SYNC,
+		Name: "O_SYNC",
+	},
+	{
+		Flag: syscall.O_TRUNC,
+		Name: "O_TRUNC",
+	},
+}
+
+func open(val uint64) string {
+	s := OpenMode.Parse(val & syscall.O_ACCMODE)
+	if flags := OpenFlagSet.Parse(val &^ syscall.O_ACCMODE); flags != "" {
+		s += "|" + flags
+	}
+	return s
+}