#!/bin/sh
# Copyright (C) 2013,2015  Codethink Limited
#
# 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; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program.  If not, see <http://www.gnu.org/licenses/>.


# Change the "/" mount point to /dev/vda to use virtio disks.

set -e

if [ "$OPENSTACK_USER" ]
then
    # Modifying fstab 
    if [ -f "$1/etc/fstab" ]
    then
        mv "$1/etc/fstab" "$1/etc/fstab.old"
        awk 'BEGIN {print "/dev/vda / btrfs defaults,rw,noatime 0 1"};
             $2 != "/" {print $0 };' "$1/etc/fstab.old" > "$1/etc/fstab"
        rm "$1/etc/fstab.old"
    else
        echo "/dev/vda / btrfs defaults,rw,noatime 0 1"> "$1/etc/fstab"
    fi
fi