|
152
|
1 // Copyright 2018 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 aix darwin solaris
|
|
|
6
|
|
|
7 package unix
|
|
|
8
|
|
|
9 import "syscall"
|
|
|
10
|
|
|
11 //extern __go_fcntl_uintptr
|
|
|
12 func fcntl(uintptr, uintptr, uintptr) (uintptr, uintptr)
|
|
|
13
|
|
|
14 func IsNonblock(fd int) (nonblocking bool, err error) {
|
|
|
15 flag, e1 := fcntl(uintptr(fd), syscall.F_GETFL, 0)
|
|
|
16 if e1 != 0 {
|
|
|
17 return false, syscall.Errno(e1)
|
|
|
18 }
|
|
|
19 return flag&syscall.O_NONBLOCK != 0, nil
|
|
|
20 }
|
