package IO::Redirect ;

sub TIEHANDLE {
  my $class = shift ;
  my ($stdout , $globpath) = @_ ;
  my $prevstdout = \*{$globpath} ;
  my $this = { STDOUT => $stdout , PREVIO => $prevstdout , PREVIOPATH => $globpath } ;
  return bless($this , $class) ;
}

sub print { &PRINT ;}

sub print_stdout {
  my $this = shift ; return 1 if $_[0] eq '' ;
  
  my $stdout = $this->{STDOUT} ;

  if ( ref($stdout) eq 'SCALAR' ) { $$stdout .= $_[0] ;}
  elsif ( ref($stdout) eq 'CODE' ) { &$stdout($this , $_[0]) ;}
  else { print $stdout $_[0] ;}

  return 1 ;
}

sub PRINT {
  my $this = shift ;
  $this->print_stdout( join("", (@_[0..$#_])) ) ;
  return 1 ;
}

sub PRINTF { &PRINT($_[0],sprintf($_[1],@_[2..$#_])) ;}

sub CLOSE {
  my $this = shift ;
  untie *{ $this->{PREVIOPATH} } ;
}

sub UNTIE {
  my $this = shift ;
  *{ $this->{PREVIOPATH} } = $this->{PREVIO} ;
}

sub DESTROY { &CLOSE }

#######
# END #
#######

package main ;
  
  my $catcher ;

  tie(*{"main::STDOUT"} => 'IO::Redirect' , \$catcher , 'main::STDOUT') ;
  
    print "Hello World!\n" ;
  
  close( *main::STDOUT ) ;
  
  print "<<$catcher>>\n" ;

exit;