Source File
	pty.go

Belonging Package
	internal/testpty

// 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()
}

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