github.com/sandwichdev/go-internals@v0.0.0-20210605002614-12311ac6b2c5/poll/fcntl_syscall.go (about)

     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  // +build dragonfly freebsd linux netbsd openbsd
     6  
     7  package poll
     8  
     9  import (
    10  	"syscall"
    11  
    12  	"github.com/SandwichDev/go-internals/syscall/unix"
    13  )
    14  
    15  func fcntl(fd int, cmd int, arg int) (int, error) {
    16  	r, _, e := syscall.Syscall(unix.FcntlSyscall, uintptr(fd), uintptr(cmd), uintptr(arg))
    17  	if e != 0 {
    18  		return int(r), syscall.Errno(e)
    19  	}
    20  	return int(r), nil
    21  }