On Mon, 23 Apr 2007, Dave Shield wrote:
> On 20/04/07, Charles Sprickman <[EMAIL PROTECTED]> wrote:
>> If I really want to have certain lines in a script that returns multiple
>> lines be reported as integers, is there *anything* I can do to force that?
>>
>> Is there something beyond exec and extend that would make more sense?
>
> Let's take a step back.
> Fundamentally, there are two possible approaches to reporting information
> via SNMP. Either the data must be munged into a form that matches the
> MIB, or a MIB must be written that matches the format of the data.
Got it.
> The "simple script" extension mechanisms ("exec" and "extend") use the
> first approach. We've defined a MIB structure that is flexible enough to
> handle arbitrary script output. Which means that it can't make assumptions
> about the format of this output, hence treating everything as text strings.
> (That doesn't handle binary output very well, but never mind).
Also understood.
> If you're needing to report multiple integer values, then you probably need
> to take the second approach, and define and implement a suitable MIB for
> your data. The simplest way to implement this would probably be using
> the "pass" directive, which also invokes a shell-script - though this would
> need to be tailored suitably.
This sounds very interesting, as I'm sure this won't be the last thing
where I need to cook up something special. I had a look at the manpage
and the brief wiki entry, but I'm wondering if anyone has a nice, simple
example of implementing "pass" that I could stare at, hack up and
hopefully learn something.
> The other possibility it to hack the code of the 'extend' module, and
> have it report integer values rather than strings. That's not something
> we can do globally, since it wouldn't be appropriate for many
> situations. But if this is a private setup, then you can tweak things
> to your heart's content. (That's the beauty of Open Source, after all!)
While tempting, I'd rather stick with a standard, unhacked install so that
anyone following me won't get lost. :)
Thanks again,
Charles
> Dave
>
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