[Xymon] analysis.cfg - LOG - keyword matching

[Becker Christian]

Hi Jeremy,


Thank you for your help – that was a good explanation to me of what the man pages do not really show ;-)


Regards
Christian


Christian Becker
IT-Services
_________________________________
Mittelrhein-Verlag GmbH
August-Horch-Straße 28
D-56070 Koblenz
Verleger und Geschäftsführer: Walterpeter Twer
Reg.-Gericht Koblenz HRB 121
Finanzamt Koblenz Str.Nr. 22 65 10 285 2
www.rhein-zeitung.de<http://www.rhein-zeitung.de/>

Von: Jeremy Laidman [mailto:jlaidman at rebel-it.com.au]
Gesendet: Mittwoch, 10. August 2016 05:47
An: Becker Christian <christian.becker at rhein-zeitung.net>; xymon at xymon.com
Betreff: Re: [Xymon] analysis.cfg - LOG - keyword matching

Christian
On Tue, Aug 9, 2016 at 5:53 PM Becker Christian <christian.becker at rhein-zeitung.net<mailto:christian.becker at rhein-zeitung.net>> wrote:
<snip>
I was thinking, that this directive
        LOG     %/var/(adm|log)/messages ERROR IGNORE=%(fd0|smbd|read_fd_with_timeout|Connection.reset.by.peer|error\.txt|gdm-simple-greeter|GdmDisplay|GdmSession|GDM|packagekitd|parport) COLOR=red
should msgs let go to red, since the message of the affected server contains the keyword “error”, even in lowercase. But the history of the msgs test for the affected server doesn’t show any red status.
I do not have the statement (?-i) in the analysis.cfg as documented in the Xymon man-pages:

Note that Xymon defaults to case-insensitive pattern matching; if that is not what you want, put "(?-i)" between the "%" and the regular expression to turn this off. E.g. "%(?-i)WARNING" will match the word WARNING only when it is upper-case.

Is my thinking wrong?
A little.

The man page mentions using "%(?-i)" in the context of matching regular expressions.  For non-regular-expressions, this doesn't apply.  The code that performs a non-RE match is:

        return (strstr(datatosearch, pattern) != NULL);

"strstr()" is a case-sensitive string match, so "ERROR" will not match "error".

You can either have a second line with the lower-case string, or convert to regular expression, and take advantage of the case-insensitive match:


        LOG     %/var/(adm|log)/messages %ERROR IGNORE=%(fd0|smbd|read_fd_with_timeout|Connection.reset.by.peer|error\.txt|gdm-simple-greeter|GdmDisplay|GdmSession|GDM|packagekitd|parport) COLOR=red

Cheers
Jeremy

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.xymon.com/pipermail/xymon/attachments/20160810/7d7495b3/attachment.html>