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Some PCRE assistance

list Charles Goyard
Tue, 16 Jan 2007 12:05:00 +0100
Message-Id: <user-152f12816a8e@xymon.invalid>

Hi,

Rich Smrcina wrote :
I've checked the PCRE tutorial and several other sites and I can not find a good match to what I'm trying to do.  I've also run several iterations through pcretest with no joy.

I have a list of users (actually virtual machine names) with the heading 'UserID'.  I would like to set up a regex to match any of them, except for the heading.  Basically, to count the machines, but ignore the heading line.

I've tried variations of "(!Userid|.*)" with no luck.
I guess you want to do it something like the procs column.

If the format is :

Userid
john
jane

you might want to try that :

^(?!Userid)(.+)

(Search the string "look-ahead assertion" in perlre(1) for some
explanation of this. Don't forget to add the preceding % in your
configfile.

It basically permits one to make pattern match only if they are not
preceded or followed by certain expressions. (Very useful when
piggy-parsing HTML :).


-- 
Charles Goyard - user-98f9625a7a59@xymon.invalid - (+33) 1 45 38 01 31