General :: Parsing Through A Nagios Config File To Extract Info W/ Sed - Awk - Vi

I have a config file called hosts.cfg.

It contains entries like this:

Quote:

There are many more of these entries in the file, over 500, all in this same format: each host has a "define host" followed by 18 directives contained in squiggly brackets.

If I want to know all the hosts that are in the hostgroup called SERVER_GRP, I suppose I would need to read every hostgroups line (8th directive in squiggly brackets) that contains SERVER_GRP and output the corresponding host_name line (1st directive in squiggly brackets) from that entry.