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#!/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"
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