#!/bin/sh
#
# Script to back uninstall Shoreline Firewall
#
#     (c) 2000-2014 - Tom Eastep (teastep@shorewall.net)
#
#       Shorewall documentation is available at http://shorewall.sourceforge.net
#
#       This program is part of Shorewall.
#
#	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.
#
#	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/>.
#
#    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
PRODUCT=shorewall-init
Product="Shorewall Init"

usage() # $1 = exit status
{
    ME=$(basename $0)
    echo "usage: $ME [ <shorewallrc file> ]"
    exit $1
}

fatal_error()
{
    echo "   ERROR: $@" >&2
    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
}

#
# Change to the directory containing this script
#
cd "$(dirname $0)"

finished=0
configure=1

while [ $finished -eq 0 ]; do
    option=$1

    case "$option" in
	-*)
	    option=${option#-}

	    while [ -n "$option" ]; do
		case $option in
		    h)
			usage 0
			;;
		    v)
			echo "$Product Firewall Installer Version $VERSION"
			exit 0
			;;
		    n*)
			configure=0
			option=${option#n}
			;;
		    *)
			usage 1
			;;
		esac
	    done

	    shift
	    ;;
	*)
	    finished=1
	    ;;
    esac
done
#
# Read the RC file
#
if [ $# -eq 0 ]; then
    if [ -f ./shorewallrc ]; then
	. ./shorewallrc
    elif [ -f ~/.shorewallrc ]; then
	. ~/.shorewallrc || exit 1
	file=./.shorewallrc
    elif [ -f /usr/share/shorewall/shorewallrc ]; then
	. /usr/share/shorewall/shorewallrc
    else
	fatal_error "No configuration file specified and /usr/share/shorewall/shorewallrc not found"
    fi
elif [ $# -eq 1 ]; then
    file=$1
    case $file in
	/*|.*)
	    ;;
	*)
	    file=./$file
	    ;;
    esac

    . $file || exit 1
else
    usage 1
fi

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

[ -n "${LIBEXEC:=${SHAREDIR}}" ]

echo "Uninstalling Shorewall Init $VERSION"

[ -n "$SANDBOX" ] && configure=0

INITSCRIPT=${CONFDIR}/init.d/shorewall-init

if [ -f "$INITSCRIPT" ]; then
    if [ $configure -eq 1 ]; then
	if [ $HOST = openwrt ]; then
	    if /etc/init.d/shorewall-init enabled; then
		/etc/init.d/shorewall-init disable
	    fi
	elif mywhich updaterc.d ; then
	    updaterc.d shorewall-init remove
	elif mywhich insserv ; then
            insserv -r $INITSCRIPT
	elif mywhich chkconfig ; then
	    chkconfig --del $(basename $INITSCRIPT)
	fi
    fi

    remove_file $INITSCRIPT
fi

if [ -z "${SERVICEDIR}" ]; then
    SERVICEDIR="$SYSTEMD"
fi

if [ -n "$SERVICEDIR" ]; then
    [ $configure -eq 1 ] && systemctl disable shorewall-init.service
    rm -f $SERVICEDIR/shorewall-init.service
fi

if [ $HOST = openwrt ]; then
    [ "$(readlink -q ${SBINDIR}/ifup-local)"   = ${SHAREDIR}/shorewall-init ] && remove_file ${SBINDIR}/ifup-local
    [ "$(readlink -q ${SBINDIR}/ifdown-local)" = ${SHAREDIR}/shorewall-init ] && remove_file ${SBINDIR}/ifdown-local
else
    [ "$(readlink -m -q ${SBINDIR}/ifup-local)"   = ${SHAREDIR}/shorewall-init ] && remove_file ${SBINDIR}/ifup-local
    [ "$(readlink -m -q ${SBINDIR}/ifdown-local)" = ${SHAREDIR}/shorewall-init ] && remove_file ${SBINDIR}/ifdown-local
fi

remove_file ${CONFDIR}/default/shorewall-init
remove_file ${CONFDIR}/sysconfig/shorewall-init

remove_file ${CONFDIR}/NetworkManager/dispatcher.d/01-shorewall

remove_file ${CONFDIR}/network/if-up.d/shorewall
remove_file ${CONFDIR}/network/if-down.d/shorewall
remove_file ${CONFDIR}/network/if-post-down.d/shorewall

remove_file ${CONFDIR}/sysconfig/network/if-up.d/shorewall
remove_file ${CONFDIR}/sysconfig/network/if-down.d/shorewall

if [ -d ${CONFDIR}/ppp ]; then
    for directory in ip-up.d ip-down.d ipv6-up.d ipv6-down.d; do
	remove_file ${CONFDIR}/ppp/$directory/shorewall
    done

    for file in if-up.local if-down.local; do
	if [ -f ${CONFDIR}/ppp/$file ]; then
	    if grep -qF Shorewall-based ${CONFDIR}/ppp/$FILE; then
		remove_file ${CONFDIR}/ppp/$FILE
	    fi
	fi
    done
fi

rm -f  ${SBINDIR}/shorewall-init
rm -rf ${SHAREDIR}/shorewall-init
rm -rf ${LIBEXECDIR}/shorewall-init

echo "Shorewall Init Uninstalled"