#! /bin/sh
#
#	kinstall/minstall - install patches to kernel sources
#
# WARNING:  This script should be run exactly once on a virgin system
#
PATH=/sbin:/usr/sbin:/bin:/usr/bin; export PATH

argv0=`basename $0`
dir=`pwd`
karch=`uname -m`
archdir="/sys/arch/$karch"
confdir="$archdir/conf"

case "$dir" in
*/OpenBSD )
	 cd ..
	 ;;
esac

echo -n "Backing up existing kernel sources ..."
backup=""
for i in fil.c ip_fil.[ch] ip_frag.[ch] ip_nat.[ch] ip_state.[ch] ip_fil_compat.h; do
	if [ -e /sys/netinet/$i ] ; then
		backup="${backup} ${i}"
	fi
done
if [ -n "$backup" ] ; then
	( cd /sys/netinet ; tar cf ipfbackup.tar $backup )
fi
echo

echo -n "Installing "
for i in ip_fil.[ch] fil.c ip_nat.[ch] ip_frag.[ch] ip_state.[ch] ip_proxy.[ch] ip_auth.[ch] ip_log.c ip_compat.h ipl.h ip_ftp_pxy.c ip_rcmd_pxy.c ip_raudio_pxy.c; do
	echo -n "$i "
	cp $i /sys/netinet/
	chmod 644 /sys/netinet/$i
done
echo

if [ -f /sys/conf/files ] ; then
	echo "Patching /sys/conf/files ..."
	cat OpenBSD/files.diffs | (cd /sys/conf; patch)
	ip_files=`egrep '^file.*ipfilter' /sys/conf/files | wc -l`
	if [ $ip_files -lt 8 ] ; then
		echo "Patching /sys/conf/files ..."
		cat OpenBSD/files.diffs | (cd /sys/conf; patch)
	fi
fi
if [ -f /sys/netinet/ip_fil_compat.h ] ; then
	echo "Linking /sys/netinet/ip_compat.h to /sys/netinet/ip_fil_compat.h"
	rm /sys/netinet/ip_fil_compat.h
	ln -s /sys/netinet/ip_compat.h /sys/netinet/ip_fil_compat.h
fi

echo -n "Kernel configuration to update [GENERIC] "
read newconfig junk

if [ -n "$newconfig" ] ; then
	config="$confdir/$newconfig"
else
	newconfig="$confdir/GENERIC"
fi

if egrep 'option.*IPFILTER' $confdir/$newconfig > /dev/null 2>&1 ; then
	echo "$newconfig already contains proper options statement..."
	echo 'You will now need to build a new kernel.'
else
	echo "Backing up $newconfig to .bak and adding IPFILTER options..."
	if [ -f $confdir/$newconfig ]; then
		mv $confdir/$newconfig $confdir/$newconfig.bak
	fi
	if [ -d $archdir/compile/$newconfig ]; then
		mv $archdir/compile/$newconfig $archdir/compile/$newconfig.bak
	fi
	awk '{print $0} $2=="INET"{print "options IPFILTER"}' \
	 $confdir/$newconfig.bak > $confdir/$newconfig

	echo 'You will now need to run "config" and build a new kernel.'
fi

exit 0