I am not calling use, I am just going straight in with dbmopen. The code is:

$FILENAME = "/blah/blah/test"

dbmopen %HASH, $FILENAME, 0666
  or die;

foreach $key (sort keys %HASH) {
  print $key, ' = ', $HASH{$key}, "\n";
}

dbmclose %HASH;
[download]

When I step through the above dbmopen with perl -d it goes into:

  /usr/lib/perl5/AnyDBM_File

and that appears to go into:

  /usr/lib/perl5/i386-linux/DB_File.pm

Am I to understand that this means that it is using the Berkeley DB implementation?

Update: I'm pretty sure I have figured out that the answer to the above question is yes. Thanks all.