#!/bin/bash
#
# priority: 100
#
# Manage network related configuration files
#
# Mark Huang <mlhuang@cs.princeton.edu>
# Copyright (C) 2006 The Trustees of Princeton University
#
# $Id$
#

# Source function library and configuration
. /etc/plc.d/functions
. /etc/planetlab/plc_config

# Be verbose
set -x

case "$1" in
    start)
	MESSAGE=$"Generating network files"
	dialog "$MESSAGE"

	hfile=$(mktemp)
	# Minimal /etc/hosts
	(
	    for server in DB API BOOT WWW ; do
		hostname=PLC_${server}_HOST
		ip=PLC_${server}_IP
		if [ -n "${!ip}" ] ; then
		    echo "${!ip}	${!hostname}"
		else
		    ip=$(gethostbyname ${!hostname})
		    if [ -n "$ip" ] ; then
			echo "$ip	${!hostname}"
		    fi
		fi
	    done
	) > $hfile
	if [ $PLC_DNS_ENABLED -eq 1 ] ; then
	    target=/etc/plc_hosts
	    sort -u $hfile > $target
	else
	    target=/etc/hosts
	    cat /etc/hosts >> $hfile
	    echo "#generated by /etc/plc.d/network" >/etc/hosts
	    echo "127.0.0.1	localhost.localdomain localhost" >>/etc/hosts
	    sort -u $hfile >> /etc/hosts
	fi
	chmod +r $target
	rm -f $hfile

	rfile=$(mktemp)
	# Set up nameservers
	(
	    [ -n "$PLC_NET_DNS1" ] && echo "nameserver $PLC_NET_DNS1"
	    [ -n "$PLC_NET_DNS2" ] && echo "nameserver $PLC_NET_DNS2"
	) > $rfile

	if [ $PLC_DNS_ENABLED -eq 1 ] ; then
	    target=/etc/plc_resolv.conf
	else
	    target=/etc/resolv.conf
	fi
	cp $rfile $target
	chmod +r $target

	result "$MESSAGE"
	;;
esac

exit $ERRORS