fcntl_syscall_test.go

     1  // Copyright 2021 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
     6  
     7  package net
     8  
     9  import (
    10  	"internal/syscall/unix"
    11  	"syscall"
    12  )
    13  
    14  func fcntl(fd int, cmd int, arg int) (int, error) {
    15  	r, _, e := syscall.Syscall(unix.FcntlSyscall, uintptr(fd), uintptr(cmd), uintptr(arg))
    16  	if e != 0 {
    17  		return int(r), syscall.Errno(e)
    18  	}
    19  	return int(r), nil
    20  }
    21
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