From 979b4b34957bf49470079917704ac7b6b4252598 Mon Sep 17 00:00:00 2001
From: Kyle Evans <kevans@FreeBSD.org>
Date: Wed, 22 Jan 2020 20:53:25 +0000
Subject: [PATCH] Mark rfork(2) as __returns_twice

rfork is not generally a built-in that would be recognized as behaving like
vfork/fork; provide the hint.
---
 include/unistd.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/unistd.h b/include/unistd.h
index 1f1f8a7cebd..5a4991ef9fe 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -552,7 +552,7 @@ char	*re_comp(const char *);
 int	 re_exec(const char *);
 int	 reboot(int);
 int	 revoke(const char *);
-pid_t	 rfork(int);
+pid_t	 rfork(int) __returns_twice;
 pid_t	 rfork_thread(int, void *, int (*)(void *), void *);
 int	 rresvport(int *);
 int	 rresvport_af(int *, int);