1// Copyright 2019 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// +build freebsd hurd linux netbsd openbsd solaris
6
7package runtime
8
9func nonblockingPipe() (r, w int32, errno int32) {
10	r, w, errno = pipe2(_O_NONBLOCK | _O_CLOEXEC)
11	if errno == -_ENOSYS {
12		r, w, errno = pipe()
13		if errno != 0 {
14			return -1, -1, errno
15		}
16		closeonexec(r)
17		setNonblock(r)
18		closeonexec(w)
19		setNonblock(w)
20	}
21	return r, w, errno
22}
23