This sub returns an array ref. You could also opt not to use the sub to access the array directly, instead.

#!/usr/bin/perl

use strict;
use warnings;

my $somedirectory = "/root/dir/";
my $files = dirlist($someDirectory);

foreach my $fileInDirectory (@$files) {
        dosomething($fileInDirectory);
}


sub dirlist {
        my $dir = shift;
        my @filelist;
        opendir(DIR, $dir) or die "can't opendir $dir: $!";
        while (defined(my $file = readdir(DIR))) {

                # Skip "." and ".."
                next if ($file =~ /^\.\.?$/);
                push(@filelist, $file);

        }
        closedir(DIR);
        return \@filelist;
}
[download]