#!/bin/sh
set -x
set -e
timestamp() {
	date +%m.%d.%y_%H.%M.%S
}

rootfs="glibc"
snap="${rootfs}-snap"

cd /ROOT

if [ -e "$snap" ] ; then
	btrfs sub del "$snap"
fi

if ! [ -e "bak" ] ; then
	btrfs sub create "bak"
fi

btrfs sub snap -r "$rootfs" "bak/${rootfs}-$(timestamp)"
btrfs sub snap "$rootfs" "$snap"
sed -i.bak -e"s/subvol=${rootfs}/subvol=${snap}/g" "${snap}/etc/fstab"