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-rw-r--r--src/internal/poll/sys_cloexec.go36
1 files changed, 36 insertions, 0 deletions
diff --git a/src/internal/poll/sys_cloexec.go b/src/internal/poll/sys_cloexec.go
new file mode 100644
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+++ b/src/internal/poll/sys_cloexec.go
@@ -0,0 +1,36 @@
+// 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 accept for platforms that do not provide a fast path for
+// setting SetNonblock and CloseOnExec.
+
+//go:build aix || darwin || (js && wasm)
+
+package poll
+
+import (
+ "syscall"
+)
+
+// 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, string, 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, "accept", err
+ }
+ if err = syscall.SetNonblock(ns, true); err != nil {
+ CloseFunc(ns)
+ return -1, nil, "setnonblock", err
+ }
+ return ns, sa, "", nil
+}