diff --git a/makebk b/makebk
index 84b0c32..168ae35 100644
--- a/makebk
+++ b/makebk
@@ -10,8 +10,9 @@ fi
 if [ $# -ge 1 ]; then
     for f in $@
     do
-        [ -n "$f" ] &&cp "$f"{,.bak}
+        [ -f "$f" ] &&cp "$f"{,.bak}
     done
 else
     echo "No filenames passed."
+    exit 1
 fi
\ No newline at end of file
diff --git a/touch2 b/touch2
index d311c30..44a342d 100644
--- a/touch2
+++ b/touch2
@@ -10,4 +10,5 @@ if [ $# -ge 1 ]; then
     done
 else
     echo "No filenames passed."
+    exit 1
 fi