nbpipe_pipe2.go

     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  //go:build dragonfly || freebsd || linux || netbsd || openbsd || solaris
     6  
     7  package runtime
     8  
     9  func 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
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