From afe8464033406a91a976f85fa06cf06fea26f179 Mon Sep 17 00:00:00 2001
From: Marc Fiuczynski <mef@cs.princeton.edu>
Date: Fri, 25 Jan 2008 19:26:43 +0000
Subject: [PATCH] configure resolv.conf and hosts files for dnsmasq

---
 plc.d/network | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/plc.d/network b/plc.d/network
index 67ebc07..141bc50 100755
--- a/plc.d/network
+++ b/plc.d/network
@@ -55,15 +55,29 @@ case "$1" in
 	# Set up nameservers
 	(
 	    [ -n "$PLC_NET_DNS1" ] && echo "nameserver $PLC_NET_DNS1"
-	    [ -n "$PLC_NET_DNS2" ] && echo "nameserver $PLC_NET_DNS2"
+	    [ -n "$PLC_NET_DNS2" -a "$PLC_NET_DNS1" != "$PLC_NET_DNS2" ] && echo "nameserver $PLC_NET_DNS2"
 	) > $rfile
 
 	if [ $PLC_DNS_ENABLED -eq 1 ] ; then
 	    target=/etc/plc_resolv.conf
+
+	    r2file=$(mktemp)
+	    echo "; generated by /etc/plc.d/network" >$r2file
+	    if [ -n "${!PLC_BOOT_IP}" ] ; then
+		echo "nameserver ${!PLC_BOOT_IP}" >>$r2file
+	    else
+		    ip=$(gethostbyname ${!PLC_BOOT_HOST})
+		    if [ -n "$ip" ] ; then
+			echo "nameserver $ip" >>$r2file
+		    fi
+	    fi
+	    changed=$(diff $r2file /etc/resolv.conf)
+	    [ $changed -ne 0 ] && cp /etc/resolv.conf /etc/resolv.conf.bak
+	    mv $r2file /etc/resolv.conf
 	else
 	    target=/etc/resolv.conf
 	fi
-	cp $rfile $target
+	mv $rfile $target
 	chmod +r $target
 
 	result "$MESSAGE"
-- 
2.45.2