I think you would need to set a variable to the result of exec_template() to use the template language to extract the fields. then compare the two variables.

David Lang

On Fri, 22 Sep 2017, Maupertuis Philippe wrote:

Date: Fri, 22 Sep 2017 17:00:19 +0200
From: Maupertuis Philippe <[email protected]>
Reply-To: rsyslog-users <[email protected]>
To: "[email protected]" <[email protected]>
Subject: [rsyslog] comparing two parts of a message

Hi,
One firewall is logging with incorrect message format.
The datetime at the beginning of each message is written twice :
Sep 22 13:00:00 Sep 22 13:00:00+02:00 10.92.136.101 Action="accept" UUid="{ ....
In such a case rewriting the message with property(name="rawmsg" 
position.from="17") give me a correct result.
What I would like is to test  is if  property(name="rawmsg" position.from="1" position.to="15") and 
property(name="rawmsg" position.from="17" position.to="31") are the same to alter the message only when 
needed.
It doesn't seem that complicated but I can't figure out how to write this test.
Any help would be welcome.
Philippe


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