On 17 dec 2014, 01:01, Risto Vaarandi wrote :
> ...as John already mentioned in his post, you will need to set up the
> 'context2' field. The 'context' field will be evaluated together with
> 'pattern' only, and it will not restrict matches by 'pattern2' field.
Absolutly, I should have read it in the man.
With context2 added, the ruleset just works fine.
> > Interesting fact : $+{_inputsrc} displays "log/RECEPTION.log" even if
> > pattern2 is matched against "log/OUTPUT.log".
> >
>
> You are seeing this because ptype2 is set to 'substr' -- which means fast
> substring search without any regular expression matching. However, for the
> reasons of efficiency, SubStr patterns do not set match any variables, and
> thus $+{_inputsrc} is will keep holding the value from the previous pattern
> match (produced by 'pattern'). If you would change 'ptype2' field from
> substr to regexp, $+{_inputsrc} would refer to "log/OUTPUT.log", since this
> time 'pattern2' is a regular expression which sets $+{_inputsrc}.
That just makes sense, thak you for highlighting this.
> A side note -- if you set ptype2=regexp and have a regular expression
> for pattern2, but want to refer to past match variables previously set
> by 'pattern', you have to use the % prefix instead of $ in the 'desc2'
> field. For example, the following fields
>
> ptype2=regexp
> pattern2=receiving file list \.\.\. done
> desc2=Alarm end on $+{_inputsrc}
> action2=logonly
>
> would log "Alarm end on log/OUTPUT.log".
>
> On the other hand, both
>
> ptype2=regexp
> pattern2=receiving file list \.\.\. done
> desc2=Alarm end on %+{_inputsrc}
> action2=logonly
>
> and
>
> ptype2=substr
> pattern2=receiving file list ... done
> desc2=Alarm end on $+{_inputsrc}
> action2=logonly
>
> would log "Alarm end on log/RECEPTION.log". In short, in Pair* rules
> $-prefix always refers to the most recent set of match variables, while
> with %-prefix you can refer to previous set of match variables. Also, the
> existence of $-prefixed and %-prefixed match variables depends on pattern
> type(s) -- for example, if ptype=substr and ptype2=substr, neither $ nor %
> match variables exist, since substr-patterns never set any match variables.
Valuable information ! Thank you.
> hope this helps,
It really does. Thanks again.
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