From 8f08e4634f0e2cb61d288ecc061d75e78c27fd30 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Fri, 6 Oct 2017 21:23:29 +0200
Subject: do not potentially pass -1 to fcntl()

---
 src/exchange/taler-exchange-httpd.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/exchange/taler-exchange-httpd.c b/src/exchange/taler-exchange-httpd.c
index 0f8740879..0dd3f9685 100644
--- a/src/exchange/taler-exchange-httpd.c
+++ b/src/exchange/taler-exchange-httpd.c
@@ -1060,9 +1060,10 @@ main (int argc,
         fh_admin = -1;
       }
       flags |= FD_CLOEXEC;
-      if (0 != fcntl (fh_admin,
-                      F_SETFD,
-                      flags))
+      if ( (-1 != fh_admin) &&
+           (0 != fcntl (fh_admin,
+                        F_SETFD,
+                        flags)) )
         GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
                              "fcntl");
     }
-- 
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