I figured that it had to be a simple mistake---Ah!

   $keyword,
      $decoder->keyword($keywords)
   );
[download]

solved the problem:

#!/usr/local/bin/perl

use strict;
use warnings;
use Parse::DMIDecode;

my $decoder = Parse::DMIDecode->new(
              dmidecode  => "/usr/sbin/dmidecode",
              nowarnings => 1,
            );
$decoder->probe;

my @keywords = $decoder->keywords;

for my $keyword (@keywords) {
    printf("%s => %s\n",
            $keyword,
            $decoder->keyword($keyword)
        );
}
[download]

Update: It's been awhile since I used Parse::DMIDecode. I remembered that the "mistake" is not a mistake. In other words, what you are seeing is exactly what Parse::DMIDecode should be doing. You are entering "slot", but "slot" is not a keyword but a "type". A "keyword" is a "string". If you enter a type, dmidecode will return a list of all valid keywords, which is what is happening. For example, a keyword would be something like system-version, processor-manufacturer, etc. Dmidecode has a good man page. Be sure to check it out.

Update: Just a little script to look at the "slot" type:

#!/usr/bin/perl

use strict;
use warnings;
use Parse::DMIDecode;

my $decoder = Parse::DMIDecode->new(
                    dmidecode  => '/usr/sbin/dmidecode',
                    nowarnings => 1,
               );
$decoder->probe;

printf("System: %s =>  %s %s %s %s\n",
       $decoder->keyword("slot-current-usage"),
       $decoder->keyword("slot-designation"),
       $decoder->keyword("slot-id"),
       $decoder->keyword("slot-length"),
       $decoder->keyword("slot-type"),
      );

my $total_structures = $decoder->structures;
printf("Structures: %s\n",
        $decoder->structures($total_structures),
        );
[download]

I added $decoder->structures($total_structures). It'll tell how many "types" there are. I got 40---numbered starting at 0 thru 39.

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