regex for dns update

Tom Schmitt TomSchmitt at
Wed May 2 11:58:41 UTC 2012


my dhcpd is sending DNS-updates to the DNS server when a lease is given to a dhcp client with the name the dhcp client is providing.

Now I want this only if the name is following a given pattern, something like:

if($clientname=~/^[A-Za-z]{4}\d{4}$/) {
else {

Can anyone tell me, what the syntax is to configure this on a global scope in dhcpd.conf?

Or a link where the syntax is explained?

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