exit if no valid rsync config could be found

diff --git a/live_build.sh b/live_build.sh
index 8c3f6f3e4b001bbc20e1dcd5f7583bf277cc9519..6b6a4112962f31c60b101cd2682c4baf4671b7e8 100755 (executable)
--- a/live_build.sh
+++ b/live_build.sh
@@ -43,6 +43,11 @@ case $LIVE_TYPE in
         RSYNC_FILTER=''
         ;;
 esac
+if [ -z "$RSYNC_SRC" -o -z "$RSYNC_DST" ]
+then
+    echo "Rsync configurations are empty. Check $0-script."
+    exit 2
+fi
 
 #
 # Export variables for upcoming sudo-calls