How to "unset" a class in cfengine 3.6.0

[Peter Wood]

I have file1 and file3 in my directory and when cfengine creates file2 I'd like it to report that.

My test script below reports creating file2 and file3 most likely because report_file class is set when file2 is created and it stays that way.

How do I get it to report only the file it creates?

#== Start

body common control {

    bundlesequence => { "mybundle" };

    inputs => {

        "/var/cfengine/inputs/def.cf",

        "/var/cfengine/inputs/lib/3.6/stdlib.cf",

    };

}

bundle agent mybundle {

  vars:

        "myList" slist => { "file1", "file2", "file3" };

  methods:

        "List Loop" usebundle => list_loop(${myList});

}

bundle agent list_loop(fileName) {

  classes:

        "hasfile" expression =>

                returnszero("/bin/ls ${fileName}", "noshell");

  commands:

        !hasfile::

                "/bin/touch ${fileName}"

                        classes => if_repaired(report_file);

  reports:

        report_file::

                "New file ${fileName}";

}

#== End

[root/ tmp]# cf-agent -KI -f ./setclass.cf

file1

/bin/ls: cannot access file2: No such file or directory

2014-07-14T15:16:30-0700     info: /default/mybundle/methods/'List Loop'/default/list_loop/commands/'/bin/touch file2'[0]: Executing 'no timeout' ... '/bin/touch file2'

2014-07-14T15:16:30-0700     info: /default/mybundle/methods/'List Loop'/default/list_loop/commands/'/bin/touch file2'[0]: Completed execution of '/bin/touch file2'

R: New file file2

file3

R: New file file3

[root/ tmp]#

Thanks,

-- Peter

[Neil Watson]

Try this:

>   commands:
>         !hasfile::
>                 "/bin/touch ${fileName}"

>                         classes => if_repaired(report_${fileName});
>   reports:
>         "New file ${fileName}"
ifvarclass => canonify( "report_${fileName}" );

--
Neil H Watson
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[Peter Wood]

Thanks Neil.

I did the change but it returned an error:

[root/ tmp]# cf-agent -KI -f ./setclass.cf

./setclass.cf:26:44: error: syntax error

                        classes => if_repaired(report_${fileName});

                                           ^

./setclass.cf:26:44: error: Expected ',', wrong input '${fileName}'

                        classes => if_repaired(report_${fileName});

                                           ^

2014-07-14T15:36:56-0700    error: There are syntax errors in policy files

2014-07-14T15:36:56-0700    error: Policy failed validation with command '"/var/cfengine/bin/cf-promises" -c "./setclass.cf"'

[root/ tmp]#

Here is the edited bundle agent:

bundle agent list_loop(fileName) {

  classes:

        "hasfile" expression =>

                returnszero("/bin/ls ${fileName}", "noshell");

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[Neil Watson]

On Mon, Jul 14, 2014 at 03:42:45PM -0700, Peter Wood wrote:
> I did the change but it returned an error:

> [root/ tmp]# cf-agent -KI -f ./[1]setclass.cf

> ./setclass.cf:26:44: error: syntax error
> classes => if_repaired(report_${fileName});

Quotes.
classes => if_repaired( "report_${fileName}" );

[Peter Wood]

Nailed it. Thanks.