FQDN Pattern/regex LUA help

["vale.gua" <vale.gua@...>]

Hi all,

I'm new in LUA; It seems that Lua does not use POSIX regular expressions (regexp) for pattern matching. Now, I've little issue and I don’t know what to do.

Let me explain better or at least I try...

On Linux (with Lua 5.1.4) I use this:

s = os.getenv("HOSTNAME") to catch the FQDN, therefore the result is:

vimhost-axzh9a.ch.bwww.com

but for me is useful only this value -> axzh9a (that obviously changes depending on the Linux server)

Is possible, with LUA, to cut from FQDN:

vimhost-

and

.ch.bwww.com

Thanks to anyone who will help me

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