mirror of https://go.googlesource.com/go
48 lines
1.4 KiB
Go
48 lines
1.4 KiB
Go
// Copyright 2024 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 for platforms that provide a fast path for
|
|
// setting SetNonblock and CloseOnExec, but don't necessarily support it.
|
|
// Support for SOCK_* flags as part of the type parameter was added to Oracle
|
|
// Solaris in the 11.4 release. Thus, on releases prior to 11.4, we fall back
|
|
// to the combination of socket(3c) and fcntl(2).
|
|
|
|
package net
|
|
|
|
import (
|
|
"internal/poll"
|
|
"internal/syscall/unix"
|
|
"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) {
|
|
// Perform a cheap test and try the fast path first.
|
|
if unix.SupportSockNonblockCloexec() {
|
|
s, err := socketFunc(family, sotype|syscall.SOCK_NONBLOCK|syscall.SOCK_CLOEXEC, proto)
|
|
if err != nil {
|
|
return -1, os.NewSyscallError("socket", err)
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
// 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 {
|
|
poll.CloseFunc(s)
|
|
return -1, os.NewSyscallError("setnonblock", err)
|
|
}
|
|
return s, nil
|
|
}
|