Add poweroff script 'poweroff.sh'.

poweroff.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+usage() {
+   if [ -n "$1" ];then
+      echo -e "\n   [ Error ]: $1"
+   fi
+
+cat<<EOF
+
+   Usage: $(basename $0) YYY-MM-DD
+
+   $(basename $0) - Scripts shuts down this machine if the given date is the actual date.
+
+                 The most common practice is, to use this script as cronjob.
+
+EOF
+
+exit 1
+}
+
+[ $# -ne "1" ] && usage "wrong number of arguments"
+
+_date=$1
+
+IFS='-' read -a _val_arr <<< "$_date"
+
+declare -i _year="${_val_arr[0]}"
+declare -i _month="${_val_arr[1]}"
+declare -i _day="${_val_arr[2]}"
+
+if [[ $_month -lt 1 ]] || [[ $_month -gt 12 ]]; then
+   usage "Wrong date format."
+fi
+
+if [[ $_day -lt 1 ]] || [[ $_day -gt 31 ]]; then
+   usage "Wrong date format."
+fi
+
+if [[ $_year -lt $(date +%Y) ]] ; then
+   usage "Wrong date format."
+fi
+
+[[ "$(/bin/date +%Y-%m-%d)" == "$_date" ]] && /sbin/poweroff
+#[[ "$(/bin/date +%Y-%m-%d)" == "$_date" ]] && echo "ok: $_date " || echo "failed: $_date"
+
+exit 0