#!/usr/local/bin/perl -w

    use Getopt::Long;

    my $ret = GetOptions ("f|filename:s");
    my $filename = $opt_f || die "Usage: $0 -f filename\n";

    # Open the file.
    open (INPUT, "$filename") || die "Could not open file $filename : $!\n";

    while (<INPUT>)
    {
       chop;
       print "Line $. = <$_>\n";
    }
    close (INPUT);