[j-nsp] commit scripts / slax

[Jonathan Looney]

This will select all units and check each unit to see if it has a
description equal to "blah":

for-each(interfaces/interface) {
    for-each(unit) {
        if (description=="blah") {
            var $int-unit = ../name _ "." _ name;
            /* Check to see if the int-unit is configured in OSPF, LDP, etc.
*/
        }
    }
}

I believe the above is equivalent to:

for-each(interfaces/interface/unit) {
    if (description=="blah") {
        var $int_unit = ../name _ "." _ name;
        /* Check to see if the int-unit is configured in OSPF, LDP, etc. */
    }
}

Which is also equivalent to:

for-each(interfaces/interface/unit[description=="blah"]) {
    var $int_unit = ../name _ "." _ name;
    /* Check to see if the int-unit is configured in OSPF, LDP, etc. */
}

(Note that the square brackets perform a comparison at that level and only
select items matching that comparison.  In this case, it performs a
comparison at the unit level and only selects units with a description equal
to "blah".)

If you wanted to allow the special description to be at either the interface
or unit level, and perform the check on all units that had the description
or were units of an interface with the description, I believe this would
work:

for-each(interfaces/interface/unit[../description == "blah" ||
description=="blah"]) {
    var $int_unit = ../name _ "." _ name;
    /* Check to see if the int-unit is configured in OSPF, LDP, etc. */
}

(That will select all units where the parent node - in this case, the
interface - has a description equal to "blah", or where the unit node itself
has a description equal to "blah".)


Alternatively, you could also use starts-with(field,pattern) to make a more
flexible match.  This will select all units where the parent node - in this
case, the interface - has a description that starts with "blah", or where
the node itself has a description that starts with "blah":

for-each(interfaces/interface/unit[starts-with(../description, "blah") ||
starts-with(description, "blah")]) {
    var $int_unit = ../name _ "." _ name;
    /* Check to see if the int-unit is configured in OSPF, LDP, etc. */
}

As you can see, you have lots of choices. :-)

DISCLAIMER: This was all freehand, so there may be typos. :-)

-Jon


2009/2/26 Cheikh-Moussa Ahmad <acm at axians.de>

> Hi Guys,
>
> I have a question regarding slax scripting. I have a script, which searches
> for a special
> description in the main interface and then check, whether unit 0 from this
> particular interface
> is configured under ospf and ldp.  Now this works fine, but the drawback of
> the script is that it
> only checks the unit 0. My first idea was to concat the for-each statement,
> but unfortunately
> this doesn't work. I'am not really familiar with slax and it is new stuff
> for me.
>
> Anyone has an idea, how to concat for-each statements in slax, or does
> anyone has a better idea/hint
> to solve this ? It should be something like this :
>
>  for-each (statemet) {
>   if(description == '****') {
>     for-each (statement) {
>       check if interface is configured in protocolls
>     }
>   }
>  }
>
>
> Regards,
>  Ahmad
>
>
>
>
>
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