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document exec_template() RainerScript function

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Rainer Gerhards 2013-12-22 15:25:15 +01:00
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@ -142,6 +142,11 @@ equivalent single-character [field($msg, 44 ,3)] extraction.
<li>prifilt(constant) - mimics a traditional PRI-based filter (like "*.*" or
"mail.info"). The traditional filter string must be given as a <b>constant string</b>.
Dynamic string evaluation is not permitted (for performance reasons).
<li>exec_template(templateName) -- executes a template and returns the string generated
by it. Note that templateName must be a constant string. This is primarily for performance
reasons. If there is a valid use case for dynamic template names, please let us know
and we will re-consider the decision. TemplateName can be any template name, including the
predefined ones.
</ul>
<p>The following example can be used to build a dynamic filter based on some environment
variable: