#! /opt/third-party/bin/perl

use strict;

my @contents;
my @files_arr;

my $DIR1 = "/source/directory/";
my $big = "thebigfile.txt";

opendir(DIR, $DIR1) || die "Unable to open files in Dir : $DIR1 <$!> \n";
  @files_arr = readdir(DIR);
closedir(DIR);

open(BIG, ">", $big) or die "Unable to open file $big <$!> \n";

foreach (@files_arr) {
  if( ! /^\./ && ! /^\.\./ ) {
    print "$_\n";
    $_ = $DIR1 . $_;
    open(FILE, "<", $_) or die "Unable to open file $_ <$!> \n";
      @contents = <FILE>;
    close(FILE);
    print BIG "@contents";
  }
}

close(BIG);

exit 0