You might find the following skeleton useful. This assumes you're already in the searchdbs folder.

foreach my $file (<*.txt>) {
   open(FILE,"< $file") or die "Cannot open $file - $!\n";
   # Read in from FILE and do stuff with it...
}
[download]

Of course, There's More Than One Way To Do It. You might find it easier dropping all the filenames in @ARGV and then using Perl's magic diamond operator:

@ARGV = <*.txt>;
while (<>) {
    # Files will now be opened and read automagically, and
    # each line placed in $_.  You can see which file
    # you're currently reading from by looking at $ARGV.
}
[download]

Understanding how the above works is left as an exercise for the reader. ;)

All the best,
Paul Fenwick
Perl Training Australia