#!/bin/sh
file=/mnt/mmcblk0p1/settings.tar

if cat /proc/mounts | grep -q mmcblk0p1 && [ -e /mnt/mmcblk0p1 ]; then
	[ -e $file ] && time=$(expr $(date +%s) - $(date +%s -r $file));
	if [ -z $time ] || [ $time -lt 0 ] || [ $time -ge 5 ]; then
		tar -cf $file -C /overlay root
	fi
fi