diff --git a/common/progress_bar.sh b/common/progress_bar.sh
index ec264e5..838f573 100755
--- a/common/progress_bar.sh
+++ b/common/progress_bar.sh
@@ -4,10 +4,12 @@
 
 set -e
 
+[[ -z $1 ]] && exit
+[[ -z $2 ]] && exit
+
 if [ ! -f $1 ] ; then
-  echo -n "."
-  sleep 1
-  if [ -d /proc/$2 ] ; then
-    ./$0 $1 $2
-  fi
+  while [ -d /proc/$2 ] ; do
+    echo -n "$2 "
+    sleep 1
+  done
 fi