#!/bin/bash
#
# author: hackbard@hackdaworld.dyndns.org
#
# script creating a minimal system nfsroot for automated installation of hdw
#

home_dir=$PWD
fairoot="$1"
iface="eth0"

[ "$2" ] && iface="$2"

myip="`ifconfig $iface | grep inet\ addr | awk '{ print $2 }' | awk -F: '{ print $2 }'`"

if [ -z $myip ] ; then
	echo "unable to figure out your ip addr."
	echo "pls specify the network interface."
	echo
	echo "example: $0 $1 br0"
	echo
	exit
fi

usage()	{
	echo
	echo "usage:"
	echo "$0 <fai-root> [<network interface>]"
	echo
	exit
	}

[ "$#" -lt "1" ] && usage
[ ! -d $fairoot ] && usage

echo "reading config ..."
if [ ! -f ./Config ] ; then
	echo "config file not found, aborting"
	exit
fi
. ./Config

if [ ! -f ./fai/nfsroot-packages ] ; then
	echo "storing $hdw_target as original target"
	hdw_orig_target=$hdw_target

	echo "pretending default target for nfsroot install now"
	export hdw_target=default
	echo "hdw_target=default # FAI_WAS_HERE" >> Config # dirty!

	./scripts/Helper -create_dist_files

	export hdw_target=$hdw_orig_target
	grep -v '# FAI_WAS_HERE' Config > tmp~
	mv tmp~ Config
	echo "orig target restored to $hdw_target"

	cp ./distro/default ./fai/nfsroot-packages

	echo "deleting some packages from list now"
	del="linux-libc-headers man-pages binutils gcc m4 autoconf automake"
	del="$del man make patch bin86 nasm lilo cvs devfsd"
	del="$del bootdisk" # just by now - may contain kernel image later
	for package in $del; do
		grep -v ^$package ./fai/nfsroot-packages > ./fai/tmp~
		mv ./fai/tmp~ ./fai/nfsroot-packages
	done
	echo "adding needed packages to list now"
	echo "portmap" >> ./fai/nfsroot-packages
	echo "tcp_wrappers" >> ./fai/nfsroot-packages
	[ "$hdw_arch" = "ia32" ] && echo "lilo" >> ./fai/nfsroot-packages
fi

if [ ! -f $fairoot/packages_installed ] ; then
	echo "creating nfsroot..."
	chmod 755 ./misc/hdw-tools/hdw-get
	./misc/hdw-tools/hdw-get dist-install $fairoot ./fai/nfsroot-packages
	touch $fairoot/packages_installed
	echo "done"
else
	echo "nfsroot seems to be available already"
	echo "(del $fairoot/packages_installed to recreate it)"
fi

if [ ! -f $fairoot/prepared_nfsroot ] ; then
	echo "preparing nfsroot for automated install routine ..."
	cd $fairoot
	# special files (null & console)
	[ ! -c dev/null ] && mknod -m 0666 dev/null c 1 3
	[ ! -c dev/console ] && mknod -m 0600 dev/console c 5 1
	# fstab
	cp $home_dir/misc/sysfiles/etc/fstab ./etc
	# the target directory
	mkdir -p ./trg
	# dir for mounting fai config
	mkdir -p fai
	# removing some services
	for i in sysklogd network inetd nscd; do
		rm -f etc/init.d/rc2.d/*${i}
	done
	# modified inittab, rc and bootscript
	sed "s%| /sbin/btee .*%%g" $home_dir/packages/base/sysvinit/inittab > \
		etc/inittab
	cp $home_dir/misc/fai/fai_boot ./etc/init.d/boot
	sed "s%^FAI_MOUNT_LINE%mount -tnfs $myip:/$home_dir/fai /fai%" \
		$home_dir/misc/fai/fai_rc > etc/init.d/rc
	chmod 755 etc/init.d/rc
	# modify hdw-get.conf
	sed "s%hdw_arch_opt=.*%hdw_arch_opt=$hdw_arch_opt%" etc/hdw-get.conf > \
		tmp~
	mv tmp~ etc/hdw-get.conf
	# get to home_dir again
	cd $home_dir
	echo "done"
	touch $fairoot/prepared_nfsroot
else
	echo "nfsroot seems to be prepared already"
	echo "(del $fairoot/prepared_nfsroot to recreate it)"
fi

echo "checking pxe/nfs environment ..."
mkdir -p /tftpboot
cp $fairoot/boot/vmlinuz_hdw /tftpboot
if [ ! -f /tftpboot/pxelinux.0 ] ; then
	if [ ! -f /usr/lib/syslinux/pxelinux.0 ] ; then
		echo "pxelinux (syslinux) not found, fix this manually now :p"
	fi
	cp /usr/lib/syslinux/pxelinux.0 /tftpboot
fi
mkdir -p /tftpboot/pxelinux.cfg
cat > /tftpboot/pxelinux.cfg/fai << EOF
PROMPT 1
DEFAULT disk
TIMEOUT 200

LABEL fai
	KERNEL vmlinuz_hdw
	APPEND root=/dev/nfs nfsroot=$myip:$fairoot ip=dhcp

LABEL disk
	LOCALBOOT 0
EOF
echo -e "$fairoot\tfoobar(async,ro,no_root_squash)" >> /etc/exports
echo -e "$home_dir/fai\tfoobar(async,ro,no_root_squash)" >> /etc/exports

echo "everything should work now. now do the following:"
echo "1) edit /etc/exports to allow your clients to mount the nfsroot"
echo "2) link the ipaddr in hex of the client to fai in pxe config dir"
echo "3) tell your dhcpd (see syslinux docs for more help)"
echo "4) make sure inetd/nfs/dhcpd are up running"
echo "5) do the configuration stuff (see doc/FAI)"
echo "6) adapt the hdw-get.conf file in the fai nfsroot tree"
echo
echo "note: tftp must support tsize option (use e.g. tftp-hpa package)"
echo

echo "done"