undocumented feature: NRPE/check_nrpe version query command

[Thomas Guyot-Sionnest]

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Matthias Eble wrote:
> Marcus Fleige schrieb:
>> Hi,
>>
>> Matthias Eble schrieb am 21.02.2008 16:57 Uhr:
>>> Hi Ethan, hi list,
>>>
>>> I found the internal _NRPE_CHECK command in the nrpe sources some months 
>>> ago and found it very useful.
>>> It can be used to remotely query nrpe's version:
>>>
>>> # check_nrpe -H somehost -c _NRPE_CHECK
>>> NRPE v2.8.1
>>>
>> Doesn't "check_nrpe -H somehost" do exactly the same? :-)
> 
> well, yes because
> 
> #define DEFAULT_NRPE_COMMAND    "_NRPE_CHECK"  /* check version of NRPE 
> daemon */
> ...
> (command_name==NULL)?DEFAULT_NRPE_COMMAND:command_name);
> 
> However, I couldn't find any documentation about it.
> check_nrpe --help only defines -c to be optional.

While it's true it's not explicitly documented, that was my
understanding last time I checked at the --help screen and saw -c as
optional. This is how I set it up - normal check_nrpe on all Linux hosts
and all remote NRPE checks dependent of it.

I agree it would be good to document this in --help; maybe even use that
as a dependency example in the sample config...

Thomas

- --
Thomas
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