Aleksey,
Don't misguide newcomers ) The ifvarclass attribute does NOT create a
class from variable, it allows to build out a class name from a
variable content and check whether such class has been defined already
or not. To create (i.e. to define) a class from a variable, one must
use classes: section.
2011/9/14 Aleksey Tsalolikhin <atsaloli.t...@gmail.com>:
> Hi, Jerome. I suggest using cf-promises to check the syntax on your policy:
>
> [cfengine00 ~]# cf-promises -f ./test.cf
> Arguments to function readfile(.) do not tally. Expect 2 not 1
> Promise (version not specified) belongs to bundle 'g' in file
> './test.cf' near line 5
> [cfengine00 ~]#
>
> You have to tell readfile max number of bytes to read from the file.
>
>
> If you want to explicitly make a class (rather than just use
> ifvarclass to create
> the class), you can do it with a classes type promise as Seva suggested.
>
> {{{
>
> bundle common g
> {
> vars:
>
> "temp" string => readfile( "/tmp/test.txt", "99" );
>
> classes:
> "$(temp)" expression => "any";
> }
>
> bundle agent animal
> {
> commands:
> "/bin/echo $(g.temp)"
> ifvarclass => canonify("$(g.temp)");
> reports:
> DOG::
> "I have a pet dog.";
> }
>
> }}}
>
> How's that?
>
> Aleksey
>
>
> On Tue, Sep 13, 2011 at 11:36 AM, Jerome Yanga <jya...@esri.com> wrote:
>> Aleksey,
>>
>> I came up with the following but I seem to be misinterpreting the reference
>> manual. I have also used canonify to no avail. Help.
>>
>> $ cat /tmp/test.txt
>> DOG
>>
>> bundle common g
>> {
>> vars:
>>
>> "temp" string => readfile( "/tmp/test.txt" );
>> }
>>
>> bundle agent animal
>> {
>> commands:
>> "/bin/echo $(g.temp)"
>> ifvarclass => "$(g.temp)";
>> reports:
>> DOG::
>> "I have a pet dog.";
>> }
>>
>> Regards,
>> j
>>
>> -----Original Message-----
>> From: Aleksey Tsalolikhin [mailto:atsaloli.t...@gmail.com]
>> Sent: Tuesday, September 13, 2011 11:20 AM
>> To: Jerome Yanga
>> Cc: help-cfengine@cfengine.org
>> Subject: Re: CFEngine Help: how to convert vars to a class
>>
>> Yes, you can do it using the ifvarclass, which converts a variable to
>> a class. Could you please read the ifvarclass section of the
>> reference manual, and let me know if you have any questions.
>>
>> Best,
>> Aleksey
>>
>>
>> On Tue, Sep 13, 2011 at 11:13 AM, Jerome Yanga <jya...@esri.com> wrote:
>>> Is it possible to do what I am attempting to?
>>>
>>> Regards,
>>> j
>>>
>>> -----Original Message-----
>>> From: Jerome Yanga
>>> Sent: Monday, September 12, 2011 4:27 PM
>>> To: 'Aleksey Tsalolikhin'
>>> Cc: 'help-cfengine@cfengine.org'
>>> Subject: RE: CFEngine Help: how to convert vars to a class
>>>
>>> Aleksey,
>>>
>>> Thank you for the quick response.
>>>
>>> My main objective is to make the contents of /tmp/test.txt into a class.
>>> Hence, I would like to do the reporting.
>>>
>>> bundle agent animal
>>> {
>>> reports:
>>> DOG::
>>> "I have a pet dog.";
>>> }
>>>
>>> Regards,
>>> j
>>>
>>> -----Original Message-----
>>> From: Aleksey Tsalolikhin [mailto:atsaloli.t...@gmail.com]
>>> Sent: Monday, September 12, 2011 4:15 PM
>>> To: Jerome Yanga
>>> Cc: help-cfengine@cfengine.org
>>> Subject: Re: CFEngine Help: how to convert vars to a class
>>>
>>> On Mon, Sep 12, 2011 at 3:58 PM, Jerome Yanga <jya...@esri.com> wrote:
>>>> I saw another post on how to do this but it does not seem to work for me.
>>>> Please correct my syntax
>>>
>>> How's this?
>>>
>>> [cfengine00 ~]# cat /tmp/test.txt
>>> DOG
>>> [cfengine00 ~]# cat test.cf
>>> body common control {
>>> bundlesequence => { "animal" };
>>> }
>>>
>>> bundle common g
>>> {
>>> vars:
>>>
>>> "temp" string => readfile("/tmp/test.txt", "4" );
>>> }
>>>
>>> bundle agent animal
>>> {
>>> commands: "/bin/echo $(g.temp)";
>>> commands:
>>> "/bin/echo I have a pet dog."
>>> ifvarclass => "$(g.temp)";
>>> }
>>> [cfengine00 ~]# cf-agent -f ./test.cf
>>> Q: ".../bin/echo DOG": DOG
>>> I: Last 1 quoted lines were generated by promiser "/bin/echo DOG"
>>> [cfengine00 ~]#
>>>
>>> Note the use of ifvarclass attribute to use a variable as a class; and
>>> the full name of the variable (including the bundle name) in g.temp.
>>> CFEngine bundles have scope, so you have to use the full name to call
>>> a variable from another bundle (even a global variable).
>>>
>>> Yours,
>>> -at
>>>
>>>
>>
>>
> _______________________________________________
> Help-cfengine mailing list
> Help-cfengine@cfengine.org
> https://cfengine.org/mailman/listinfo/help-cfengine
>
--
SY, Seva Gluschenko.
_______________________________________________
Help-cfengine mailing list
Help-cfengine@cfengine.org
https://cfengine.org/mailman/listinfo/help-cfengine
