From 5913503be2725e43b888fdaea5c081196ff36e09 Mon Sep 17 00:00:00 2001
From: Dave Kennedy <dave-kennedy@outlook.com>
Date: Wed, 10 Feb 2016 23:45:57 -0700
Subject: [PATCH] Don't run without a target

---
 mkstage4.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/mkstage4.sh b/mkstage4.sh
index 14330d9..e107edc 100755
--- a/mkstage4.sh
+++ b/mkstage4.sh
@@ -41,6 +41,19 @@ while getopts ':t:sqcb' flag; do
   esac
 done
 
+if [ "$TARGET" == "" ]
+then
+  echo "`basename $0`: no target specified."
+  echo "syntax:"
+  echo "\$ `basename $0` [-q -c -b] [-s || -t <target-mountpoint>] <archive-filename> [custom-tar-options]"
+  echo "-q: activates quiet mode (no confirmation)."
+  echo "-c: excludes connman network lists."
+  echo "-b: excludes boot directory."
+  echo "-s: makes tarball of current system."
+  echo "-t: makes tarball of system located at the <target-mountpoint>."
+  exit 1
+fi
+
 # shifts pointer to read mandatory output file specification
 shift $(($OPTIND - 1))
 ARCHIVE=$1