github.com/code-reading/golang@v0.0.0-20220303082512-ba5bc0e589a3/go/src/net/main_cloexec_test.go (about) 1 // Copyright 2015 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 || illumos || linux || netbsd || openbsd 6 // +build dragonfly freebsd illumos linux netbsd openbsd 7 8 package net 9 10 import "internal/poll" 11 12 func init() { 13 extraTestHookInstallers = append(extraTestHookInstallers, installAccept4TestHook) 14 extraTestHookUninstallers = append(extraTestHookUninstallers, uninstallAccept4TestHook) 15 } 16 17 var ( 18 // Placeholders for saving original socket system calls. 19 origAccept4 = poll.Accept4Func 20 ) 21 22 func installAccept4TestHook() { 23 poll.Accept4Func = sw.Accept4 24 } 25 26 func uninstallAccept4TestHook() { 27 poll.Accept4Func = origAccept4 28 }