FreeBSDAdmin/DNS/update.sh

#!/usr/local/bin/bash
# Update
#
# Douglas Thrift
#
# $Id$

read -e hostname interface name secret < ~/.update || exit $?

old=`host $hostname | sed -Ee "s/^$hostname has address ([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$/\1/p;d"`
address=`ifconfig $interface | sed -Ee 's/^     inet ([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}) netmask 0x[0-9a-f]{8} broadcast [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/\1/p;d'`

if [[ $old != $address ]]; then
        nsupdate <<-EOF
        key $name $secret
        update delete $hostname A
        update add $hostname 3600 A $address
        send
        EOF
fi
Revision:	847
Committed:	2006-08-03T18:06:23-07:00 (18 years, 10 months ago) by douglas
Content type:	text/x-sh
File size:	573 byte(s)
Log Message:	Update!
#	Content
1	#!/usr/local/bin/bash
2	# Update
3	#
4	# Douglas Thrift
5	#
6	# $Id$
7
8	read -e hostname interface name secret < ~/.update \|\| exit $?
9
10	old=`host $hostname \| sed -Ee "s/^$hostname has address ([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})$/\1/p;d"`
11	address=`ifconfig $interface \| sed -Ee 's/^ inet ([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}) netmask 0x[0-9a-f]{8} broadcast [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/\1/p;d'`
12
13	if [[ $old != $address ]]; then
14	nsupdate <<-EOF
15	key $name $secret
16	update delete $hostname A
17	update add $hostname 3600 A $address
18	send
19	EOF
20	fi