From 07d9978fb94b50345dfe0d52f48b1fe962417cfd Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Thu, 5 May 2016 17:40:38 +0200
Subject: implementing #4449

---
 src/exchange-tools/taler-exchange-wire.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'src/exchange-tools')

diff --git a/src/exchange-tools/taler-exchange-wire.c b/src/exchange-tools/taler-exchange-wire.c
index 81f292a1d..c84c0b693 100644
--- a/src/exchange-tools/taler-exchange-wire.c
+++ b/src/exchange-tools/taler-exchange-wire.c
@@ -177,9 +177,18 @@ run (void *cls,
 
   if (NULL != output_filename)
   {
-    fclose (stdout);
+    if (NULL != stdout)
+      fclose (stdout);
     stdout = fopen (output_filename,
 		    "w+");
+    if (NULL == stdout)
+    {
+      fprintf (stderr,
+               "Failed to open `%s': %s\n",
+               output_filename,
+               STRERROR (errno));
+      return;
+    }
   }
   fprintf (stdout,
 	   "%s",
-- 
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