#!/bin/sh -e
#
# btrfs-mksnapshot-rootfs -- Make snapshots of root filesystems ("/")
# Copyright (c)2014-2020 Alexander Barton (alex@barton.de)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#

NAME=$(basename "$0")

Usage()
{
	echo "Usage: $NAME"; echo
	exit 1
}

[ $# -eq 0 ] || Usage

if [ "$(findmnt -fnr -o fstype /)" = "btrfs" ]; then
	if [ -x /usr/local/sbin/btrfs-mksnapshot ]; then
		/usr/local/sbin/btrfs-mksnapshot -1 / || exit 1
	else
		echo "\"/usr/local/sbin/btrfs-mksnapshot\" not executable, snapshot creation skipped."
	fi
else
	echo "Root filesystem is not of type \"btrfs\", snapshot creation skipped."
fi
exit 0