1 files changed, 56 insertions, 0 deletions
diff --git a/lib/libc/thread/atfork.c b/lib/libc/thread/atfork.c
new file mode 100644
index 00000000000..e4ae398df5a
--- /dev/null
+++ b/lib/libc/thread/atfork.c
@@ -0,0 +1,56 @@
+/*	$OpenBSD: atfork.c,v 1.1 2015/04/07 01:27:07 guenther Exp $ */
+
+/*
+ * Copyright (c) 2008 Kurt Miller <kurt@openbsd.org>
+ * Copyright (c) 2008 Philip Guenther <guenther@openbsd.org>
+ * Copyright (c) 2003 Daniel Eischen <deischen@freebsd.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD: /repoman/r/ncvs/src/lib/libc_r/uthread/uthread_atfork.c,v 1.1 2004/12/10 03:36:45 grog Exp $
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include "thread_private.h"
+#include "atfork.h"
+
+int
+_thread_atfork(void (*prepare)(void), void (*parent)(void),
+    void (*child)(void), void *dso)
+{
+	struct atfork_fn *af;
+
+	if ((af = malloc(sizeof *af)) == NULL)
+		return (ENOMEM);
+
+	af->fn_prepare = prepare;
+	af->fn_parent = parent;
+	af->fn_child = child;
+	af->fn_dso = dso;
+	_ATFORK_LOCK();
+	TAILQ_INSERT_TAIL(&_atfork_list, af, fn_next);
+	_ATFORK_UNLOCK();
+	return (0);
+}