| // Copyright 2018 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| //go:build aix || darwin || solaris | |
| package unix | |
| import ( | |
| "syscall" | |
| _ "unsafe" // for go:linkname | |
| ) | |
| func IsNonblock(fd int) (nonblocking bool, err error) { | |
| flag, e1 := fcntl(fd, syscall.F_GETFL, 0) | |
| if e1 != nil { | |
| return false, e1 | |
| } | |
| return flag&syscall.O_NONBLOCK != 0, nil | |
| } | |
| // Implemented in the syscall package. | |
| // | |
| //go:linkname fcntl syscall.fcntl | |
| func fcntl(fd int, cmd int, arg int) (int, error) |