From fc9f21e1089d8b5fafe743b419979d2f1070debb Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Fri, 10 Mar 2017 18:11:52 +0100
Subject: [PATCH] check return value from dup2

---
 src/transport/gnunet-transport-certificate-creation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/transport/gnunet-transport-certificate-creation.c b/src/transport/gnunet-transport-certificate-creation.c
index 129df7b35..edaf4773a 100644
--- a/src/transport/gnunet-transport-certificate-creation.c
+++ b/src/transport/gnunet-transport-certificate-creation.c
@@ -44,7 +44,7 @@ make_dev_zero (int fd,
   GNUNET_assert (-1 != z);
   if (z == fd)
     return;
-  dup2 (z, fd);
+  GNUNET_break (fd == dup2 (z, fd));
   GNUNET_assert (0 == close (z));
 }
 #endif
-- 
2.25.1