diff --git a/backup.sh b/backup.sh
index c08b48d..b3e1334 100644
--- a/backup.sh
+++ b/backup.sh
@@ -1,17 +1,38 @@
 #! /bin/bash
 
-source /home/usera/functions.sh
+source functions.sh
+
+function listBackups {
+   ls -lrt $1
+   exit 0
+}
+
+function usage {
+   echo "$0 [-l] dir1 dir2"
+   echo "make or list backups"
+   exit 0
+}
 
 if [ $UID -ne 0 ] ; then
   echo "need root"
   exit 1
 fi
 
+while getopts l OPTION ; do
+   case $OPTION in
+   (l) listBackups ${backupdir}/.. ; ;;
+   (h) usage ; ;;
+   (*) usage ; ;;
+   esac
+done
+
+shift $((OPTIND -1))
+
 backupdir=/var/backups/$(date -I)
 mkdir -p $backupdir || myerror 2 "impossible de créer $backupdir"
 
 for dir in "$@" ; do
   test -d $dir || { echo $dir dont exist ; continue ; } 
-  echo cp -a $dir bkpdir/
+  echo cp -a $dir $backupdir
 done