IO::File::Cycle

gistfile1.pl

package IO::File::Cycle;
use base 'IO::File';

sub open {
    my $io = shift;
    *{$io} = \ { 
        cycle_count => 1, 
        cycle_file => $_[0],
        cycle_called_with => [@_],
    };
    $io->SUPER::open(@_);
}

sub cycle {
    my $io = shift;
    $io->close;
    my ($base_filename, @mode_and_perms) = @{$$$io->{cycle_called_with}};
    $$$io->{cycle_file} = join '.', $base_filename, ++$$$io->{cycle_count};
    $io->SUPER::open($$$io->{cycle_file}, @mode_and_perms);
}

sub filename {
    my $io = shift;
    return $$$io->{cycle_file};
}