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

[David E. Nelson]

Hi Guolin,

Looks to be missing a pair of parens:

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

Regards,
         /\/elson

On Wed, 23 Aug 2006, Guolin Cheng wrote:

> David,
>
> Good idea.
>
> I tried the following but it fails.
>
>
> 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: help-cfengine-bounces+guolin=alexa.com@gnu.org
> [mailto:help-cfengine-bounces+guolin=alexa.com@gnu.org] On Behalf Of
> David E. Nelson
> Sent: Wednesday, August 23, 2006 5:40 PM
> To: Robinson Tiemuqinke
> Cc: help-cfengine@gnu.org
> 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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