use strict;
use warnings;

package MyPackage;

sub open_file {
   my $fh;
   my $ok;

   require 5.006;  # Require Perl 5.6

   # Support both 2 and 3 arg version of open.
   if (@_ == 1) {
      $ok = open($fh, $_[0]);
   } else {
      $ok = open($fh, $_[0], $_[1]);
   }

   die("$!\n") unless $ok;
   return $fh;
}

1;