1// Copyright 2009 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 aix || darwin
6
7package os
8
9import "syscall"
10
11// Pipe returns a connected pair of Files; reads from r return bytes written to w.
12// It returns the files and an error, if any.
13func Pipe() (r *File, w *File, err error) {
14	var p [2]int
15
16	// See ../syscall/exec.go for description of lock.
17	syscall.ForkLock.RLock()
18	e := syscall.Pipe(p[0:])
19	if e != nil {
20		syscall.ForkLock.RUnlock()
21		return nil, nil, NewSyscallError("pipe", e)
22	}
23	syscall.CloseOnExec(p[0])
24	syscall.CloseOnExec(p[1])
25	syscall.ForkLock.RUnlock()
26
27	return newFile(p[0], "|0", kindPipe, false), newFile(p[1], "|1", kindPipe, false), nil
28}
29