1// Copyright 2017 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build cgo && (aix || dragonfly || freebsd || (linux && !android) || netbsd || openbsd)
6
7package testpty
8
9/*
10#define _XOPEN_SOURCE 600
11#include <fcntl.h>
12#include <stdlib.h>
13#include <unistd.h>
14*/
15import "C"
16
17import "os"
18
19func open() (pty *os.File, processTTY string, err error) {
20	m, err := C.posix_openpt(C.O_RDWR)
21	if m < 0 {
22		return nil, "", ptyError("posix_openpt", err)
23	}
24	if res, err := C.grantpt(m); res < 0 {
25		C.close(m)
26		return nil, "", ptyError("grantpt", err)
27	}
28	if res, err := C.unlockpt(m); res < 0 {
29		C.close(m)
30		return nil, "", ptyError("unlockpt", err)
31	}
32	processTTY = C.GoString(C.ptsname(m))
33	return os.NewFile(uintptr(m), "pty"), processTTY, nil
34}
35