From 7f8b7887912ee1d2e506d6894db4e49835d546e8 Mon Sep 17 00:00:00 2001
From: gutmet <me.git@gutmet.org>
Date: Sun, 16 Dec 2018 17:30:44 +0100
Subject: [PATCH] dobackup: usage info

---
 dobackup | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dobackup b/dobackup
index f479f02..40ae764 100755
--- a/dobackup
+++ b/dobackup
@@ -19,6 +19,12 @@
 ##################################################################
 
 
+if [ -z $1 ]; then
+    echo "usage: dobackup FILE"
+    echo "need file with backup instructions"
+    exit 1
+fi
+
 name=`basename $1`
 source $1