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RE: defining classes based on returning results of (shell) commands?


From: Guolin Cheng
Subject: RE: defining classes based on returning results of (shell) commands?
Date: Wed, 23 Aug 2006 17:47:16 -0700

David, 

 Good idea.

 I tried the following but it fails.

checkCommand = ReturnsZero(/usr/bin/test "`sysctl -e -n net.ipv4.tcp_abc
2>/dev/null` " = '1')

 Error messages are:
...
 cf:cfengine::/var/lib/cfengine/inputs/cf.groups:102: syntax error
...

 The #102 line is the checkCommand class definition line.

 Any ideas?

Thanks.

--Guolin



-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
David E. Nelson
Sent: Wednesday, August 23, 2006 5:40 PM
To: Robinson Tiemuqinke
Cc: address@hidden
Subject: Re: defining classes based on returning results of (shell)
commands?


Hi Robinson,

How about leveraging 'egrep'?  For example, I use something like the
following 
in my 'groups:' section:

WrongOptLocal = ( ReturnsZero(/bin/sh -c
"PATH=/bin:/usr/bin:/sbin:/usr/sbin ; 
mount | egrep 'filer:/vol/vol0/opt/local' > /dev/null 2>&1") )

Use regex w/ egrep to get as specific as you want.

And then in 'alerts:' I have:

alerts:

   WrongOptLocal::

     "WARNING: System is mounting /opt/local from the wrong filer"

Regards,
         /\/elson


On Wed, 23 Aug 2006, Robinson Tiemuqinke wrote:

> Hi,
>
> If there are any ways to define groups/classes with
> the return results of (shell) commands? Currently
> there is a function called ReturnZero can be used to
> define classes based on exit code, like explained in
> the online reference:
>
> ReturnsZero(command)
> True if the named shell command returns with exit code
> zero (success).
>
> But what I'd like to have is something like the
> following:
>
> strCmpReturn(identificationString, command)
>
>       True if the named shell command returns with
> (exactly) the identificationString(or number).
>
> If there is already a function like the above? If
> not, anyone can suggest another way to workaround it?
>
> Thanks a lot.
>
>
>
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