#!/usr/bin/prefork-interp -U,perl
# -*- perl -*-

use strict;
use Proc::Prefork::Interp;

sub prwhen ($) {
  my ($when) = @_;
  my @env = sort keys %ENV;
  print STDERR "$when - STDERR - @ARGV - $ENV{PREFORK_INTERP} - @env\n"
    and flush STDERR or die $!;
  print STDOUT "$when - STDOUT\n"
    and flush STDOUT or die $!;
}

prwhen('BEGIN');

prefork_initialisation_complete();

prwhen('AFTER');

while (<STDIN>) {
  last unless m{\S};
  $_ = uc $_;
  print or die $!;
  flush STDOUT or die $!;
  print STDERR length, "\n";
}