Nagios ignoring Perl Shebang

[Arno Lehmann]

Hello,

On 1/27/2006 5:24 AM, Stanley.Hopcroft at Dest.gov.au wrote:
> Dear Folks,
> 
> 
>>-----Original Message-----
>>From: nagios-users-admin at lists.sourceforge.net 
>>--__--__--
>>
>>Message: 1
>>Date: Thu, 26 Jan 2006 23:12:03 +0100
>>From: Arno Lehmann <al at its-lehmann.de>
>>To: nagios-users at lists.sourceforge.net
>>Subject: Re: [Nagios-users] Nagios ignoring Perl Shebang - 
>>Was: Notification  script problems.. How do I debug
>>
>>You've probably got a Nagios with embedded Perl running. There's a 
>>section in the manual with some hints how to write your Perl 
>>scripts in 
>>that case.
>>
>>Arno
> 
> 
> I don't think so. 
> 
> I haven't been following this thread so I don't have too much helpful to
> say but embedded Perl doesn't care about the shebang.
> 
> If the plugin text contains the string '/bin/perl' - usually in the
> shebang line, 
> then the plugin is assumed to be Perl and is compiled by the Perl
> compiler (called
> by eval { }) once, and thereafter the in core op-codes executed without
> recompilation.

Yes, but I *think* I recall something about special requirements for 
Perl plugins that are interpreted by he embedded Perl engine. The manual 
section docs/embeddedperl.html lists some restrictions and things to 
consider. Anyway, since I never used ePN,I have no hands-on experience 
if any "normal" Perl program needs chenges.

> In any case, all my plugins and all the standard plugins have a standard
> shebang line
> that works fine with embedded Perl.
> 
> The usual way to deal with _any_ misbehaving program that Nagios runs -
> plugins, 
> event handlers, the whole shebang - is to wrap the offender in a
> reliable script that
> captures the argv it was called with, invokes the program with those
> args and then
> logs args and stdout, stderr to somewhere convenient.

(I wish that were more common knowledge)

> I know that this matter of wrappers has been discussed on this list
> before
> (my name and Andreas Ericsson).

Indeed, and those are valuable hints.

Arno

> Yours sincerely.
> 
> 
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-- 
IT-Service Lehmann                    al at its-lehmann.de
Arno Lehmann                  http://www.its-lehmann.de


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