solution

backup.sh

@@ -0,0 +1,38 @@
+#! /bin/bash
+
+
+
+set -eu
+IFS=$'\n\t'
+
+[ $UID -eq 0 ] || { echo "need to be root" ; exit 1 ; }
+
+if [ $# -lt 1 ] ; then
+  echo "missing dir list"
+  exit 1
+fi
+
+while getopts h OPTION ; do
+  case $OPTION in
+    (h)
+      echo "Usage: $0 dir1 [dir2] [dir3] [...]"
+      exit 0
+      ;;
+    (*)
+      echo "Mauvaise option"
+      exit 1
+      ;;
+    esac
+done  
+
+
+bdir=/var/run/backup_$(date -I)
+
+mkdir -p $bdir || exit 2
+
+for dir in "$@" ; do
+  test -d $dir || { echo $dir dont exists ; continue ; }
+  dirname=$(basename $dir)
+  tar -cpzf ${bdir}/${dirname}.tgz $dir
+  echo $? > /run/${dirname}.status
+done