NetBSD-1.2/minstall

#! /bin/sh -e
# $Id$
# install ip-filter & patches to kernel sources
#
# Heavily hacked by vax@linkdead.paranoia.com (VaX-n8)
# NOTE: There is an "-e" option on the first line; bomb out quickly if errors
# WARNING:  This script should be run exactly once on a virgin system.
# NOTE: Once you have configured a kernel with this device, it will default
# to being enabled.  Use "ipf -D" in /etc/netstart (before configuring
# interfaces) to disable it.
#
PATH=/sbin:/usr/sbin:/bin:/usr/bin; export PATH

# there's some brain damage in ash that won't handle non-argument flags,
# so I have a -m which should really be a boolean here
export optstring="d:c:a:m:"
export supparches="i386"
export argv0=$(basename "$0")
export destdir=""	# assume $destdir/sys is a symlink to the src tree
export architecture=$(uname -m)		# take a good guess at architecture
# do some rather tedious guesswork at the kernel config location
kconfull="$(IFS=:; set -- $(uname -v); eval echo \"\$$#\")"
export kconfull
if [ -n "$kconfull" ]; then
	kconfdir=$(dirname $(dirname "$kconfull"))/conf
	export newconfig="$(basename "$kconfull")"
else
	kconfdir="/sys/arch/${architecture}/conf"
fi
export kconfdir
while getopts "$optstring" name; do
	# ash is broken; case statements don't work right, calls * every time
	# seems ash requires quotes on the patterns -- strange
	case "$name" in
		#( root of the source tree, a la DESTDIR in NetBSD Makefiles
		'd') destdir="$OPTARG";;
		#( name of new config file
		'c') newconfig="$OPTARG";;
		#( name of architecture
		'a') architecture="$OPTARG";;
		#( if we want it as a loadable kernel module or not
		'm') modload="_LKM";;
		#( default... bad arg, missing option, etc
		*)
		export OLDIFS="$IFS"		# save IFS
		echo -n "Usage: $argv0 [-"
		# I would use IFS="."; echo "$@" except ash screws it up
		# I have submitted a send-pr to fix it.  Until then...
		IFS=":"
		set -- $optstring
		while [ "$#" -gt 0 ]; do echo -n "$1"; shift; done; echo "]"
		IFS="$OLDIFS"
		expln="\
OPT:ARG:DEFAULT:MEANING:\
-d:destdir:\"$destdir\":parent dir of \"sys\", no slash:\
-c:configfile:\"$newconfig\":kernel config filename, no dir:\
-k:kconfdir:\"$kconfdir\":kernel config directory:\
-a:arch:\"$architecture\":architecture, e.g. $supparches:\
-m:boolean:\"$modload\":install as loadable module:\
-?:::this help screen"
		IFS=$(printf ":\012\015"); set -- $expln; IFS="$OLDIFS"
		for i in 1 2 3; do eval "maxsz$i=0"; done
		while [ "$#" -ge 4 ]; do for i in 1 2 3; do
			eval j=\"\$$i\ \" \; len=\${#j} \; \
				if test \"\$maxsz$i\" -lt \"\$len\" \; then \
				maxsz$i=\"\$len\" \; fi
			done; shift 4; done
		IFS=$(printf ":\012\015"); set -- $expln; IFS="$OLDIFS"
		while [ "$#" -ge 4 ]; do for i in 1 2 3; do
			eval j=\"\$$i\ \" \; printf \"%-\${maxsz$i}s\" \"\$j\"
			done; echo "$4"; shift 4; done
		exit 127 ;;
	esac
done

archdir="$destdir/sys/arch/$architecture"

case "$architecture" in
i386)
	echo "Patching $archdir/$architecture/conf.c"
	(cd "$archdir/$architecture" && patch) < conf.c-PATCH
	;;
*)
	echo "$argv0: target architecture not supported: $architecture" 1>&2
	exit 2
	;;
esac

(cd ..
files="ip_nat.[ch] ip_fil.[ch] ip_frag.[ch] ip_state.[ch] fil.c ip_compat.h"
echo "Installing $files"
install -c -m 644 $files "$destdir/sys/netinet"
)

set -- i*.c-PATCH
echo "Patching $(echo "$@" | sed -n 's/\([a-zA-Z]*\)-PATCH/\1/gp')"
while [ -n "$1" ]; do
	(cd "$destdir/sys/netinet" && patch) < "$1"
	shift
done

set -- files*-PATCH
echo "Patching $(echo "$@" | sed -n 's/\([a-zA-Z]*\)-PATCH/\1/gp')"
while [ -n "$1" ]; do
	(cd "$destdir/" && patch) < "$1"
	shift
done

# get this kernel's name from uname version string as a good guess for kconfig
set -- $(uname -v | sed -n '/.*(\([^ ][^ ]*\)).*/s//\1/p; 1q') "GENERIC"
while [ ! -f "$kconfdir/$newconfig" ]; do
	eval ${newconfig:+"echo $kconfdir/$newconfig not found 1>&2"}
	read -p "Kernel configuration to update [$1] " newconfig junk
	: ${newconfig:=$1} # set to default if not set
done

if tmp=`grep IPFILTER "$kconfdir/$newconfig"`; then
	echo "$newconfig already contains \"$tmp\"..."
	echo 'You will now need to build a new kernel.'
else
	echo "Saving $newconfig as $newconfig.bak"
	mv -i "$kconfdir/$newconfig" "$kconfdir/$newconfig.bak"
	compdir="$archdir/compile"
	if [ -d "$compdir/$newconfig" ]; then
		echo "Saving $compdir/$newconfig as $compdir/$newconfig.bak"
		mv -i "$compdir/$newconfig" "$compdir/$newconfig.bak"
	fi
	modload="options	IPFILTER${modload}"
	echo "Modifying $newconfig, adding $modload"
	awk "{print \$0} \$2==\"INET\"{print \"$modload\"}" \
		 "$kconfdir/$newconfig.bak" > "$kconfdir/$newconfig"
	echo 'You will now need to run "config" and build a new kernel.'
fi

exit 0