[rancid] Ignore differences in certain lines?

Aaron Wasserott aaron.wasserott at viawest.com
Thu Jul 24 18:38:07 UTC 2014

I got it to work, at least capturing additional input. The main thing I did to fix it was -not- put my new command at the bottom of the list. I kept getting this error:

Completed device.company.com: End of run not found

Then after moving my new command up in the commandtable array it worked fine.

Any thoughts/ideas on how to not email out based on changes to certain output?



-----Original Message-----
From: Rancid-discuss [mailto:rancid-discuss-bounces at shrubbery.net] On Behalf Of Aaron Wasserott
Sent: Thursday, July 24, 2014 9:49 AM
To: rancid-discuss at shrubbery.net
Subject: Re: [rancid] Ignore differences in certain lines?

>> Trying to capture 'show interface status' output from Cisco IOS 
>> switches, but ignore the output for diff purposes. Is that possible? 
>> I guess it would have to be part of the mailer function to not send 
>> output for certain lines.
>> I copied the ShowVLAN sub-routine because it already appends ! in 
>> front of the lines, so they are not considered config lines. But 
>> right now I can't even get the output captured.
>> This is the new sub I am using:
>> # This routine parses "show interface status"
>> sub ShowIntStat {
>>     print STDERR "    In ShowIntStat: $_" if ($debug);
>>     #($_ = <INPUT>, return(1)) if (!$DO_SHOW_INT_STAT);
>>     while (<INPUT>) {
>>         tr/\015//d;
>>         last if (/^$prompt/);
>>         next if (/^(\s*|\s*$cmd\s*)$/);
>>         return(1) if /^\s*\^\s*$/;
>>         return(1) if /Line has invalid autocommand /;
>>         return(1) if /(Invalid input detected|Type help or )/;
>>         return(1) if /Ambiguous command/i;
>>         # newer releases (~12.1(9)) place the vlan config in the normal
>>         # configuration (write term).
>>         #return(1) if ($type =~ /^(3550|4500)$/);
>>         #return(1) if ($type !~ /^(2900XL|3500XL|6000)$/);
>>         return(-1) if (/command authorization failed/i);
>>         # the pager can not be disabled per-session on the PIX
>>         if (/^(<-+ More -+>)/) {
>>             my($len) = length($1);
>>             s/^$1\s{$len}//;
>>         }
>>         ProcessHistory("COMMENTS","keysort","IO","!INT: $_");
>>     }
>>     ProcessHistory("COMMENTS","keysort","IO","!\n");
>>     return(0);
>> }

> Did you add corresponding entries to @command in the rancid script to match your new sub? Just follow the existing pattern, it's obvious how it must work.

Yep I added this line to the commandtable in the rancid file.

{'show interface status'        => 'ShowIntStat'},

It is picking it up, because if I rename the my sub-routine I see an error in the logs. So something inside the sub-routine is not parsing output right.

I'll play around with it some more.



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