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- // Copyright 2013 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.
- // +build hurd linux
- package os
- import "syscall"
- // Pipe returns a connected pair of Files; reads from r return bytes written to w.
- // It returns the files and an error, if any.
- func Pipe() (r *File, w *File, err error) {
- var p [2]int
- e := syscall.Pipe2(p[0:], syscall.O_CLOEXEC)
- // pipe2 was added in 2.6.27 and our minimum requirement is 2.6.23, so it
- // might not be implemented.
- if e == syscall.ENOSYS {
- // See ../syscall/exec.go for description of lock.
- syscall.ForkLock.RLock()
- e = syscall.Pipe(p[0:])
- if e != nil {
- syscall.ForkLock.RUnlock()
- return nil, nil, NewSyscallError("pipe", e)
- }
- syscall.CloseOnExec(p[0])
- syscall.CloseOnExec(p[1])
- syscall.ForkLock.RUnlock()
- } else if e != nil {
- return nil, nil, NewSyscallError("pipe2", e)
- }
- return newFile(uintptr(p[0]), "|0", kindPipe), newFile(uintptr(p[1]), "|1", kindPipe), nil
- }
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