X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=plc.d%2Fdns;h=afdf55ffd4ad5fcfa26d512cad2eef0a6db16a90;hb=039b8b04f1e3e9f584abf83797ae3f1a8c421e23;hp=446c21f25716962da1cda860d0d4c6bb5db490e9;hpb=2fdcbfd7f3cf30b5bb9e5641294d3c02a3e24db7;p=myplc.git

diff --git a/plc.d/dns b/plc.d/dns
index 446c21f..afdf55f 100755
--- a/plc.d/dns
+++ b/plc.d/dns
@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# priority: 850
+# priority: 950
 #
 # Start local DNS server to provide minimal DNS forward resolution for
 # ourselves and our nodes.
@@ -8,52 +8,91 @@
 # Mark Huang <mlhuang@cs.princeton.edu>
 # Copyright (C) 2006 The Trustees of Princeton University
 #
-# $Id: mail,v 1.2 2006/04/25 21:18:19 mlhuang Exp $
-#
 
 # Source function library and configuration
 . /etc/plc.d/functions
 . /etc/planetlab/plc_config
 
+SIGNATURE="; generated by /etc/plc.d/dns --- DO NOT REMOVE THIS TEXT"
+
+# Be verbose
+set -x
+
 case "$1" in
     start)
-	if [ "$PLC_DNS_ENABLED" != "1" ] ; then
-	    exit 0
+	if [ $PLC_DNS_ENABLED -eq 1 ] ; then
+	    MESSAGE="Starting DNS server"
+	    dialog "$MESSAGE"
+
+	    dns-config
+	    check
+	fi
+
+	# Set up nameservers
+	if [ -n "$PLC_NET_DNS1" -o -n "$PLC_NET_DNS2" ] ; then
+	    MESSAGE="Configuring resolv.conf"
+	    dialog "$MESSAGE"
+
+	    rfile=$(mktemp)
+	    (
+		echo $SIGNATURE
+		[ -n "$PLC_NET_DNS1" ] && echo "nameserver $PLC_NET_DNS1"
+		[ -n "$PLC_NET_DNS2" -a "$PLC_NET_DNS1" != "$PLC_NET_DNS2" ] && echo "nameserver $PLC_NET_DNS2"
+	    ) > $rfile
+	    
+	    if [ $PLC_DNS_ENABLED -eq 1 ] ; then
+		ourfile=$(grep "$SIGNATURE" /etc/resolv.conf| wc -l)
+		if [ $ourfile -eq 0 ] ; then
+		    cp /etc/resolv.conf /etc/plc_resolv.conf
+		fi
+	    else
+		cp /etc/resolv.conf /etc/resolv_plc.backup
+	    fi
+	    mv -f $rfile /etc/resolv.conf
+	    chmod 444 /etc/resolv.conf
 	fi
 
-	MESSAGE=$"Starting DNS server"
-	dialog "$MESSAGE"
-
-	# From the default dnsmasq.conf configuration file:
-	#
-	# The [domain-needed and bogus-priv] options make you a better
-	# netizen, since they tell dnsmasq to filter out queries which
-	# the public DNS cannot answer, and which load the servers
-	# (especially the root servers) uneccessarily.
-	#
-	# The api-config bootstrap script writes node hostnames to
-	# /etc/plc_hosts.
-	#
-	cat >/etc/dnsmasq.conf <<EOF
-domain-needed
-bogus-priv
-addn-hosts=/etc/plc_hosts
-EOF
-
-	plc_daemon dnsmasq
-	check
+	if [ $PLC_DNS_ENABLED -eq 1 ] ; then
+	    plc_daemon dnsmasq
+	    check
+	fi
 
 	result "$MESSAGE"
 	;;
 
     stop)
-	MESSAGE=$"Stopping DNS server"
-	dialog "$MESSAGE"
+	if [ $PLC_DNS_ENABLED -eq 1 ] ; then
+	    MESSAGE=$"Reverting /etc/resolv.conf"
+	    dialog "$MESSAGE"
+	    if [ -f "/etc/plc_resolv.conf" ] ; then
+		ourfile=$(grep "$SIGNATURE" /etc/plc_resolv.conf| wc -l)
+		if [ $ourfile -ne 0 ] ; then 
+		    dialog "WARNING: original /etc/resolv.conf was generated by etc/plc.d/dns"		
+		fi
+		mv -f /etc/plc_resolv.conf /etc/resolv.conf
+	    fi
+	    check
+	    result ""
+	    MESSAGE=$"Removing /etc/plc_hosts"
+	    dialog "$MESSAGE"
+	    [ -f "/etc/plc_hosts" ] && rm -f /etc/plc_hosts
+	    result ""
+	fi
+	if [ $PLC_DNS_ENABLED -eq 0 -a -f "/etc/resolv_plc.backup" ] ; then
+	    MESSAGE="Restoring /etc/resolv.conf"
+	    dialog "$MESSAGE"
+	    mv -f /etc/resolv_plc.backup /etc/resolv.conf
+	    result ""
+	fi
 
-	killproc plc_dnsmasq
-	check
+	if [ $PLC_DNS_ENABLED -eq 1 ] ; then
+	    MESSAGE="Stopping DNS server"
+	    dialog "$MESSAGE"
+	    killproc plc_dnsmasq
+	    check
+	    result ""
+	fi
 
-	result "$MESSAGE"
 	;;
 esac