pipe_unix.go

     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  
     7  package os
     8  
     9  import "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.
    13  func 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
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