#!/bin/sh

# Copyright (c) 2018, The ULBSD Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# $Id: ulbsd-rollback 32 2020-07-26 20:21:22Z sv $

DIR="/usr/local/share/ulbsd/rollbacks/"

if [ "${1}" == "create" ]
then

    DATE="`date +'%Y%m%d-%H%M%S'`"
    VERSION="`uname -r`"
    RBPOINT="${VERSION}-${DATE}"
    RBPOINTDIR="${DIR}${RBPOINT}"

    mkdir -p ${RBPOINTDIR}
    pkg create -a -o ${RBPOINTDIR}

    echo ""
    echo "Rollback point ${RBPOINT} created in directory ${DIR}."
    echo ""

else

    RBPOINT=$1
    RBPOINTDIR="${DIR}${RBPOINT}"

    if [ ! "${RBPOINT}" ]
    then
        echo ""
        echo "No Rollback point set!"
        echo ""
        exit
    fi

    if [ ! -d "${RBPOINTDIR}" ]
    then
        echo ""
        echo "Rollback point ${RBPOINT} not exists!"
        echo ""
        exit
    fi

    pkg lock -y pkg
    pkg delete -afy
    pkg unlock -y pkg

    /bin/csh -c rehash

    i=0
    for p in `ls ${RBPOINTDIR}/*`
    do
        i="`expr -e ${i} + 1`"
        echo "Installing package ${i}:"
        pkg add ${p}
        /bin/csh -c rehash
    done

    echo ""
    echo "Return to the Rollback point ${RBPOINT} made."
    echo ""

fi
