Parse "masters" ip from named.conf - Shell Programming and Scripting

Citricut · #1 (**permalink**) 04-15-2008

Hi there, Im' trying to make a script to parse the BIND configuration file from my slave DNS server and obtain a certain parameter. The named.conf file has this format:

Code:

zone "0.170.20.10.in-addr.arpa" {
       type slave;
       file "0/./db.0.170.20.10.in-addr.arpa.bak";
       allow-notify { 172.16.1.208; };
       masters {
               172.16.1.208;
       };
};

zone "180.20.10.in-addr.arpa" {
       type slave;
       file "1/8/db.180.20.10.in-addr.arpa.bak";
       allow-notify { 172.16.1.208; };
       masters {
               172.16.1.208;
       };
};

zone "0.180.20.10.in-addr.arpa" {
       type slave;
       file "0/./db.0.180.20.10.in-addr.arpa.bak";
       allow-notify { 172.16.1.208; };
       masters {
               172.16.1.208;
       };
};

I want to parse, given a zone name, the IP addres in "masters { }" for that zone.
The closest I've got is

Code:

nawk '/zone "180.20.10.in-addr.arpa"/,/[000-999].[000-999].*;/' /opt/bind/etc/named.conf

but it stops in the "allow-notify" line. I can't use "};" regexp neigther because is also stops in the allow-notify.
Any idea will be welcome

era · #2 (**permalink**) 04-15-2008

Quote:

Originally Posted by Citricut

I want to parse, given a zone name, the IP addres in "masters { }" for that zone.
The closest I've got is

Code:

nawk '/zone "180.20.10.in-addr.arpa"/,/[000-999].[000-999].*;/' /opt/bind/etc/named.conf

but it stops in the "allow-notify" line. I can't use "};" regexp neigther because is also stops in the allow-notify.
Any idea will be welcome

If the file always has the final "};" at start of line, you can match that.

Code:

nawk '/zone "180.20.10.in-addr.arpa"/,/^};/{ if ($0 !~ /[^ .0-9;]/) print }' /opt/bind/etc/named.conf

Trimming the trailing semicolon still left as an exercise.

Citricut · #3 (**permalink**) 04-15-2008

And thanks to era's help, here is the code!

Code:

 nawk '/zone "180.20.10.in-addr.arpa"/,/^};/{ if ($0 !~ /[^ .0-9;]/) print }' /opt/bind/etc/named.conf |sed 's/^[ \t]*//;s/\;//'

I wanted to parse this so I can have a record of wich was the masters IP in the moment I remove the zone from the named.conf file.

Thank you very much!

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