#!/bin/sh
#
# Script to back uninstall Shoreline Firewall
#
#     This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
#
#     (c) 2000-2011 - Tom Eastep (teastep@shorewall.net)
#
#       Shorewall documentation is available at http://www.shorewall.net
#
#       This program is free software; you can redistribute it and/or modify
#       it under the terms of Version 2 of the GNU General Public License
#       as published by the Free Software Foundation.
#
#       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, write to the Free Software
#       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
#    Usage:
#
#       You may only use this script to uninstall the version
#       shown below. Simply run this script to remove Shorewall Firewall

VERSION=xxx #The Build script inserts the actual version

usage() # $1 = exit status
{
    ME=$(basename $0)
    echo "usage: $ME"
    exit $1
}

qt()
{
    "$@" >/dev/null 2>&1
}

split() {
    local ifs
    ifs=$IFS
    IFS=:
    set -- $1
    echo $*
    IFS=$ifs
}

mywhich() {
    local dir

    for dir in $(split $PATH); do
	if [ -x $dir/$1 ]; then
	    return 0
	fi
    done

    return 2
}

remove_file() # $1 = file to restore
{
    if [ -f $1 -o -L $1 ] ; then
	rm -f $1
	echo "$1 Removed"
    fi
}

if [ -f ./.shorewallrc ]; then
    . ./.shorewallrc || exit 1
elif [ -f ~/.shorewallrc ]; then
    . ~/.shorewallrc || exit 1
elif [ -r /root/.shorewallrc ]; then
    . /root/.shorewallrc || exit 1
elif [ -r /.shorewallrc ]; then
    . /root/.shorewallrc || exit 1
elif - -f ${SHOREAWLLRC_HOME}/.shorewallrc; then
    . ${SHOREWALLRC_HOME}/.shorewallrc || exit 1
else
    [ -n "${LIBEXEC:=/usr/share}" ]
    [ -n "${PERLLIB:=/usr/share/shorewall}" ]
    [ -n "${CONFDIR:=/etc}" ]
    
    if [ -z "$SYSCONFDIR" ]; then
	if [ -d /etc/default ]; then
	    SYSCONFDIR=/etc/default
	else
	    SYSCONFDIR=/etc/sysconfig
	fi
    fi

    [ -n "${SBINDIR:=/sbin}" ]
    [ -n "${SHAREDIR:=/usr/share}" ]
    [ -n "${VARDIR:=/var/lib}" ]
    [ -n "${INITFILE:=shorewall}" ]
    [ -n "${INITDIR:=/etc/init.d}" ]
    [ -n "${MANDIR:=/usr/share/man}" ]
fi

if [ -f ${SHAREDIR}/shorewall/version ]; then
    INSTALLED_VERSION="$(cat ${SHAREDIR}/shorewall/version)"
    if [ "$INSTALLED_VERSION" != "$VERSION" ]; then
	echo "WARNING: Shorewall Version $INSTALLED_VERSION is installed"
	echo "         and this is the $VERSION uninstaller."
	VERSION="$INSTALLED_VERSION"
    fi
else
    echo "WARNING: Shorewall Version $VERSION is not installed"
    VERSION=""
fi


echo "Uninstalling shorewall $VERSION"

if qt iptables -L shorewall -n && [ ! -f ${SBINDIR}/shorewall-lite ]; then
   shorewall clear
fi

if [ -L ${SHAREDIR}/shorewall/init ]; then
    FIREWALL=$(readlink -m -q ${SHAREDIR}/shorewall/init)
elif [ -n "$INITFILE" ]; then
    FIREWALL=/${INITDIR}/${INITFILE}
fi

if [ -f "$FIREWALL" ]; then
    if mywhich updaterc.d; then
	updaterc.d shorewall remove
    elif mywhich insserv; then
        insserv -r $FIREWALL
    elif mywhich systemctl; then
	systemctl disable shorewall
    elif mywhich chkconfig; then
	chkconfig --del $(basename $FIREWALL)
    fi

    remove_file $FIREWALL
    [ -f "$AUXINITFILE" ] && remove_file ${INITDIR}/{$AUXINITFILE}
fi

rm -f ${SBINDIR}/shorewall

rm -rf ${SHAREDIR}/shorewall/version
rm -rf ${CONFDIR}/shorewall
rm -rf ${VARDIR}/shorewall
rm -rf ${PERLLIB}/Shorewall/*
rm -rf ${LIBEXEC}/shorewall
rm -rf ${SHAREDIR}/shorewall/configfiles/
rm -rf ${SHAREDIR}/shorewall/Samples/
rm -rf ${SHAREDIR}/shorewall/Shorewall/
rm -f  ${SHAREDIR}/shorewall/lib.cli-std
rm -f  ${SHAREDIR}/shorewall/lib.core
rm -f  ${SHAREDIR}/shorewall/compiler.pl
rm -f  ${SHAREDIR}/shorewall/prog.*
rm -f  ${SHAREDIR}/shorewall/module*
rm -f  ${SHAREDIR}/shorewall/helpers
rm -f  ${SHAREDIR}/shorewall/action*
rm -f  ${SHAREDIR}/shorewall/init

for f in ${MANDIR}/man5/shorewall* ${MANDIR}/man8/shorewall*; do
    case $f in
	shorewall6*|shorewall-lite*)
	    ;;
	*)
	    rm -f $f
	    ;;
    esac
done

rm -f  ${CONFDIR}/logrotate.d/shorewall

if [ -n "$SYSTEMD" ]; THEN
rm -f  ${SYSTEMD}/shorewall.service

echo "Shorewall Uninstalled"