regular expression problem in macros - Need help

[Charles Jones]

Resending this to the list in hopes that Henrik sees it.

-Charles

Charles Jones wrote:
> Has anyone been able to confirm or reproduce this?
>
> -Charles
>
> Charles Jones wrote:
>> I am again being bitten by regex problems.  I am able to reproduce it 
>> with the following entries in hobbit-alerts.cfg:
>>
>> $IGNORE_HOSTS=%prod-web-(1|2|3|4|9|10|11)$
>> HOST=$IGNORE_HOSTS service=*
>> IGNORE
>>
>> If I then check the "info" column of a host that is *not* supposed to 
>> be ignored, such as prod-web-12. It shows that it is indeed ignored. 
>> This is a serious problem as I have already missed alerts for some 
>> production hosts because of this problem.
>>
>> According to pcretest (Henriks recommended method of testing a Hobbit 
>> regex), there is nothing wrong with the regular expression that I am 
>> using:
>> $ pcretest
>> PCRE version 6.6 06-Feb-2006
>> re> /prod-web-(1|2|3|4|9|10|11)$/
>> data> prod-web-12    (*correctly not matching*)
>> No match
>> data> prod-web-19  (*correctly not matching*)
>> No match
>> data> prod-web-10 (*correctly matching*)
>>  0: prod-web-10
>>  1: 10
>>
>> From the above tests you can see that prod-web-12 does not match the 
>> regex when using pcretest, yet Hobbit is matching it for some reason. 
>> A possible work-around could be to not use a regex at all, such as 
>> $IGNORE_HOSTS=prod-web-1,prod-web-2,prod-web-3... but that is not 
>> really a solution if you have hundreds of hosts, and my main point is 
>> that regular expressions are not working as they are documented.
>>
>> I've also tried other undocumented ways of using the regex, including:
>>
>> No hosts matched at all
>> $IGNORE_HOSTS=%prod-web-(1|2|3|4|9|10|11)$
>> HOST="IGNORE_HOSTS"
>>
>> No hosts matched at all
>> $IGNORE_HOSTS="%prod-web-(1|2|3|4|9|10|11)$"
>> HOST=$IGNORE_HOSTS
>>
>> All hosts match (both web-12 and web-11)
>> $IGNORE_HOSTS=prod-web-(1|2|3|4|9|10|11)$
>> HOST=%$IGNORE_HOSTS
>>
>> If anyone else can verify or reproduce this, it would be helpful in 
>> at least convincing Henrik to add it to the list of things to fix in 
>> the next version. I honestly hope that it's not a problem with Hobbit 
>> and instead something I am doing wrong - if so please enlighten me.
>>
>> -Charles
>

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