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// 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 dragonfly nacl netbsd openbsd solaris
package net
import (
"os"
"syscall"
)
// Wrapper around the socket system call that marks the returned file
// descriptor as nonblocking and close-on-exec.
func sysSocket(family, sotype, proto int) (int, error) {
// See ../syscall/exec_unix.go for description of ForkLock.
syscall.ForkLock.RLock()
s, err := socketFunc(family, sotype, proto)
if err == nil {
syscall.CloseOnExec(s)
}
syscall.ForkLock.RUnlock()
if err != nil {
return -1, os.NewSyscallError("socket", err)
}
if err = syscall.SetNonblock(s, true); err != nil {
closeFunc(s)
return -1, os.NewSyscallError("setnonblock", err)
}
return s, nil
}
// Wrapper around the accept system call that marks the returned file
// descriptor as nonblocking and close-on-exec.
func accept(s 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.
ns, sa, err := acceptFunc(s)
if err == nil {
syscall.CloseOnExec(ns)
}
if err != nil {
return -1, nil, os.NewSyscallError("accept", err)
}
if err = syscall.SetNonblock(ns, true); err != nil {
closeFunc(ns)
return -1, nil, os.NewSyscallError("setnonblock", err)
}
return ns, sa, nil
}
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