#!/usr/bin/perl
use strict;
use warnings;
use Term::ReadKey;

# Is data comming?
usage() unless ( ( ! -t STDIN ) || ((defined($ARGV[0])) && ( -f $ARGV[0] )) );
open(TTY,"+</dev/tty") or die "Couldn't open tty: $!\n";

# input record separator is \x1d
$/ = "\x1D";

while ( my $rec = <>) {
  next unless defined $rec;
  show_formatted_record();

  print TTY "\n\nOne more? y/n ";

  ReadMode('cbreak', *TTY);
  my $answer = ReadKey(0, *TTY);
  ReadMode('normal', *TTY);

  last if $answer !~ /^[yY]$/;
}
print "\n";

#---- functions: 
sub usage { print "usage: ...\n"; exit 1; }

sub show_formatted_record { print "..."; }