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

fairoot="$1"
myip="`ifconfig eth0 | grep inet\ addr | awk '{ print $3 }' | awk -F: '{ print $2 }'`"
home_dir=$PWD

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

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

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

if [ ! -d ./fai ] ; then
	echo "creating fai directory"
	mkdir ./fai
fi

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

	./scripts/Helper -create_dist_files

	export hdw_target=$hdw_orig_target
	echo "orig target restored to $hdw_target"

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

echo "deleting some packages from list now"
del="linux-libc-headers man-pages binutils gcc m4 autoconf automake"
del="$del man make patch bin86 nasm lilo cvs"
del="$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

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


echo "preparing nfsroot for automated install routine ..."

cd $fairoot

mknod -m 0666 dev/null c 1 3
mknod -m 0600 dev/console c 5 1

grep -v swap etc/fstab > tmp~
mv tmp~ etc/fstab

for i in sysklogd network inetd nscd; do
	rm -f etc/init.d/rc2.d/*${i}
done

cd $home_dir

echo "done"

echo "checking pxe/nfs environment ..."
mkdir -p /tftpboot
cp $fairoot/boot/vmlinuz_hdw /tftpboot
if [ ! -f /tftpboot/pxelinux.0 ] ; then
	if [ ! -f /usr/lib/syslinux/pxelinux.0 ] ; then
		echo "pxelinux (syslinux) not found, fix this manually now :p"
	fi
	cp /usr/lib/syslinux/pxelinux.0 /tftpboot
fi
mkdir -p /tftpboot/pxelinux.cfg
echo -e "LABEL fai" > /tftpboot/pxelinux.cfg/fai
echo -e "\tKERNEL vmlinuz_hdw" >> /tftpboot/pxelinux.cfg/fai
echo -e "\tAPPEND root=/dev/nfs nfsroot=$myip:$fairoot \\" >> \
	/tftpboot/pxelinux.cfg/fai
echo -e "\tip=dhcp" >> /tftpboot/pxelinux.cfg/fai
echo -e "\tPROMPT 1" >> /tftpboot/pxelinux.cfg/fai
echo -e "$fairoot\tfoobar(async,ro,no_root_squash)" >> /etc/exports

echo "mounting configuration dir to nfsroot export ..."
mkdir -p $fairoot/fai-config
mount --bind $PWD/fai $fairoot/fai-config

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
echo "note: tftp must support tsize option (use e.g. tftp-hpa package)
echo

echo "done"