From ccd992355df7192993c666236047820244914598 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:19:13 +0200 Subject: Adding upstream version 1.21.8. Signed-off-by: Daniel Baumann --- src/net/sock_cloexec.go | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 src/net/sock_cloexec.go (limited to 'src/net/sock_cloexec.go') diff --git a/src/net/sock_cloexec.go b/src/net/sock_cloexec.go new file mode 100644 index 0000000..9eeb897 --- /dev/null +++ b/src/net/sock_cloexec.go @@ -0,0 +1,48 @@ +// 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 for platforms that provide a fast path for +// setting SetNonblock and CloseOnExec. + +//go:build dragonfly || freebsd || linux || netbsd || openbsd || solaris + +package net + +import ( + "internal/poll" + "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) { + s, err := socketFunc(family, sotype|syscall.SOCK_NONBLOCK|syscall.SOCK_CLOEXEC, proto) + // TODO: We can remove the fallback on Linux and *BSD, + // as currently supported versions all support accept4 + // with SOCK_CLOEXEC, but Solaris does not. See issue #59359. + switch err { + case nil: + return s, nil + default: + return -1, os.NewSyscallError("socket", err) + case syscall.EPROTONOSUPPORT, syscall.EINVAL: + } + + // 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 +} -- cgit v1.2.3