github.com/freddyisaac/sicortex-golang@v0.0.0-20231019035217-e03519e66f60/src/os/pipe_linux.go (about)

     1  // Copyright 2013 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  package os
     6  
     7  import "syscall"
     8  
     9  // Pipe returns a connected pair of Files; reads from r return bytes written to w.
    10  // It returns the files and an error, if any.
    11  func Pipe() (r *File, w *File, err error) {
    12  	var p [2]int
    13  
    14  /*
    15  	e := syscall.Pipe2(p[0:], syscall.O_CLOEXEC)
    16  	// pipe2 was added in 2.6.27 and our minimum requirement is 2.6.23, so it
    17  	// might not be implemented.
    18  	if e == syscall.ENOSYS {
    19  */
    20  		// See ../syscall/exec.go for description of lock.
    21  		syscall.ForkLock.RLock()
    22  		e := syscall.Pipe(p[0:])
    23  		if e != nil {
    24  			syscall.ForkLock.RUnlock()
    25  			return nil, nil, NewSyscallError("pipe", e)
    26  		}
    27  		syscall.CloseOnExec(p[0])
    28  		syscall.CloseOnExec(p[1])
    29  		syscall.ForkLock.RUnlock()
    30  /*
    31  	} else if e != nil {
    32  		return nil, nil, NewSyscallError("pipe2", e)
    33  	}
    34  */
    35  
    36  	f1 := NewFile(uintptr(p[0]), "|0")
    37  	f2 := NewFile(uintptr(p[1]), "|1")
    38  	return f1, f2, nil
    39  
    40  //	return NewFile(uintptr(p[0]), "|0"), NewFile(uintptr(p[1]), "|1"), nil
    41  }