#! /bin/bash
cd /var/named/chroot/etc/

#store number of lines in conf file
lines=`cat named.conf | wc -l`

# bc calculates how many lines to tail - header
modifylines=`echo "$lines-27" | bc`

#write the header to a file (first 27 lines)
head -27 named.conf > named.conf.head

# just modify the zone file lines, the first 27 lines do not need to be changed
tail -$modifylines named.conf > named.conf.tail

sed -e "s/type master/type slave/g" named.conf.tail > named.conf.slave
sed -e "s/file \"pri\/rev\//file \"sec\/rev\//g" named.conf.slave > named.conf.rev
sed -e "s/file \"pri\/fwd\//file \"sec\/fwd\//g" named.conf.rev > named.conf.fwd

awk '{print $0} /\";/ {found=1} /\";/ && found {print "\tmasters { SLAVE1_IP; };"}' named.conf.fwd > named.conf.tailnew
awk '{print $0} /\";/ {found=1} /\";/ && found {print "\tmasters { SLAVE2_IP; };"}' named.conf.fwd > named.conf.tailnew2

cat named.conf.head named.conf.tailnew > /var/named/chroot/etc/named_slave/named.conf
cat named.conf.head named.conf.tailnew2 > /var/named/chroot/etc/named_slave/named.conf2

rm named.conf.tail named.conf.head named.conf.fwd named.conf.slave named.conf.tailnew named.conf.rev

# rsync it over to secondary
rsync -e ssh -avzlP /var/named/chroot/etc/named_slave/named.conf root@ns2.server:/var/named/chroot/etc/.
ssh ns2.server "service named reload"

rsync -e ssh -avzlP /var/named/chroot/etc/named_slave/named.conf2 root@ns3.server:/var/named/chroot/etc/named.conf
ssh ns3.server "service named reload"

service named reload