1 files changed, 38 insertions, 0 deletions
diff --git a/src/internal/testpty/pty.go b/src/internal/testpty/pty.go
new file mode 100644
index 0000000..f0b2a33
--- /dev/null
+++ b/src/internal/testpty/pty.go
@@ -0,0 +1,38 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package testpty is a simple pseudo-terminal package for Unix systems,
+// implemented by calling C functions via cgo.
+package testpty
+
+import (
+	"errors"
+	"fmt"
+	"os"
+)
+
+type PtyError struct {
+	FuncName    string
+	ErrorString string
+	Errno       error
+}
+
+func ptyError(name string, err error) *PtyError {
+	return &PtyError{name, err.Error(), err}
+}
+
+func (e *PtyError) Error() string {
+	return fmt.Sprintf("%s: %s", e.FuncName, e.ErrorString)
+}
+
+func (e *PtyError) Unwrap() error { return e.Errno }
+
+var ErrNotSupported = errors.New("testpty.Open not implemented on this platform")
+
+// Open returns a control pty and the name of the linked process tty.
+//
+// If Open is not implemented on this platform, it returns ErrNotSupported.
+func Open() (pty *os.File, processTTY string, err error) {
+	return open()
+}