Re: Number of files in a directory?

[nathan r. hruby]

On Tue, 15 Mar 2005, Mark Burgess wrote:

> > control:
> >         MailQueueCount = ( ExecResult(find /var/spool/mqueue -type f -name 'q*' 
> > | wc -l )
> >
> > classes:
> >         MailqueOverLimit = ( ReturnsZero(/usr/bin/test $(MailQueueCount) -ge 
> > 12) )
> >
> >         Warning; completely untested, but it hopefully indicates the way I
> > was thinking.  Mark, does this mean that boolean operations would be a
> > good idea in cfengine?
>
> I don't know what you mean by a boolean operation.

Well, at least a few additional "operators" like "less than" or "greater
than" which return true/false to set a class to prevent this kind of
senseless abuse of fork() :)

control:
        x = ( ExecResult( something-big ) )
        y = ( ExecResult( something-small ) )

classes:
        XisBiggerThanY = ( GreaterThan( $(x) $(y) ) )

Yeah, this looks perl-esque, but I think a few extra operators would be
handy (We already have a substr() ).. I see there are already tests like
this in the cmp= operator for packages: and bymatches= for processes: so
it might make sense to refactor that code into something for more general
use?

Of course, I could be totally wrong and possibly drain bamaged.  YMMV.

--- BEGIN PIE IN THE SKY WISHES ---
Even better would be a hook to directories that allows one to generate an
action or set a class based on both high a low watermarks:

directories:
        SomeHost::
                /path/to/dir
                        maxfiles=1000
                        minfiles=2
                        define=DespoolSomeAppQueue

Hitting maxfiles would define the classes in define=, hitting minfiles
would act similarly to the way SensibleCount does currently. 
Maybe this would be better suited as its own action "filecount:"

Maybe for cfengine-3...

--- END PIE ---

Thanks!

-n
--
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nathan hruby <nhruby@uga.edu>
uga enterprise information technology services
production systems support
metaphysically wrinkle-free
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