go sys_cloexec 源码
golang sys_cloexec 代码
文件路径：/src/net/internal/socktest/sys_cloexec.go
// Copyright 2015 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 dragonfly || freebsd || linux || netbsd || openbsd || solaris
package socktest
import "syscall"
// Accept4 wraps syscall.Accept4.
func (sw *Switch) Accept4(s, flags int) (ns int, sa syscall.Sockaddr, err error) {
so := sw.sockso(s)
if so == nil {
return syscall.Accept4(s, flags)
}
sw.fmu.RLock()
f := sw.fltab[FilterAccept]
sw.fmu.RUnlock()
af, err := f.apply(so)
if err != nil {
return -1, nil, err
}
ns, sa, so.Err = syscall.Accept4(s, flags)
if err = af.apply(so); err != nil {
if so.Err == nil {
syscall.Close(ns)
}
return -1, nil, err
}
sw.smu.Lock()
defer sw.smu.Unlock()
if so.Err != nil {
sw.stats.getLocked(so.Cookie).AcceptFailed++
return -1, nil, so.Err
}
nso := sw.addLocked(ns, so.Cookie.Family(), so.Cookie.Type(), so.Cookie.Protocol())
sw.stats.getLocked(nso.Cookie).Accepted++
return ns, sa, nil
}
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