From 1451624bd458ba3152d88b28a103da914510ec20 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 6 Jun 2012 02:21:59 +0200
Subject: [PATCH] Some error handling

---
 mkmap.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mkmap.sh b/mkmap.sh
index e0f00cc..cd64d42 100755
--- a/mkmap.sh
+++ b/mkmap.sh
@@ -1,8 +1,13 @@
 #!/bin/bash
 
+set -e
+
 DEST=$1
 
 
+[ "$DEST" ] || exit 1
+
+
 GWL=`batctl gwl -n`
 
 SELF=`echo "$GWL" | head -n 1 | sed -r -e 's@^.*MainIF/MAC: [^/]+/([0-9a-f:]+).*$@\1@'`