commit fe922b7fd5875497bb2f0ea2b0b5fbbf677c5630
Author: Thomas Constans <thomas@opendoor.fr>
Date:   Thu May 19 18:58:17 2022 +0200

    solution

diff --git a/backup.sh b/backup.sh
new file mode 100644
index 0000000..f249592
--- /dev/null
+++ b/backup.sh
@@ -0,0 +1,23 @@
+#! /bin/bash
+
+
+set -eu
+IFS=$'\n\t'
+
+[ $UID -eq 0 ] || { echo "need to be root" ; exit 1 ; }
+
+if [ $# -lt 1 ] ; then
+  echo "missing dir list"
+  exit 1
+fi
+
+bdir=/var/run/backup_$(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
\ No newline at end of file