55 lines
1.6 KiB
Go
55 lines
1.6 KiB
Go
// Copyright 2013 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.
|
|
|
|
// This file implements sysSocket and accept for platforms that do not
|
|
// provide a fast path for setting SetNonblock and CloseOnExec.
|
|
|
|
// +build darwin freebsd netbsd openbsd
|
|
|
|
package net
|
|
|
|
import "syscall"
|
|
|
|
// Wrapper around the socket system call that marks the returned file
|
|
// descriptor as nonblocking and close-on-exec.
|
|
func sysSocket(f, t, p int) (int, error) {
|
|
// See ../syscall/exec_unix.go for description of ForkLock.
|
|
syscall.ForkLock.RLock()
|
|
s, err := syscall.Socket(f, t, p)
|
|
if err == nil {
|
|
syscall.CloseOnExec(s)
|
|
}
|
|
syscall.ForkLock.RUnlock()
|
|
if err != nil {
|
|
return -1, err
|
|
}
|
|
if err = syscall.SetNonblock(s, true); err != nil {
|
|
syscall.Close(s)
|
|
return -1, err
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
// Wrapper around the accept system call that marks the returned file
|
|
// descriptor as nonblocking and close-on-exec.
|
|
func accept(fd int) (int, syscall.Sockaddr, error) {
|
|
// See ../syscall/exec_unix.go for description of ForkLock.
|
|
// It is probably okay to hold the lock across syscall.Accept
|
|
// because we have put fd.sysfd into non-blocking mode.
|
|
// However, a call to the File method will put it back into
|
|
// blocking mode. We can't take that risk, so no use of ForkLock here.
|
|
nfd, sa, err := syscall.Accept(fd)
|
|
if err == nil {
|
|
syscall.CloseOnExec(nfd)
|
|
}
|
|
if err != nil {
|
|
return -1, nil, err
|
|
}
|
|
if err = syscall.SetNonblock(nfd, true); err != nil {
|
|
syscall.Close(nfd)
|
|
return -1, nil, err
|
|
}
|
|
return nfd, sa, nil
|
|
}
|