ch10.010_best

Perl Best Practices the source code

##############################################################################
##   Code fragment (Recommended) from Chapter 10 of "Perl Best Practices"   ##
##     Copyright (c) O'Reilly & Associates, 2005. All Rights Reserved.      ##
##  See: http://www.oreilly.com/pub/a/oreilly/ask_tim/2001/codepolicy.html  ##
##############################################################################


# Standard modules...
use strict;
use warnings;
use IO::Prompt;
use Carp;
use English qw( -no_match_vars );
use Data::Alias;
use Readonly;


# Wrap the Bozo::get_data() subroutine cleanly.
# (Apparently this subroutine is hard-wired to only read from a filehandle
#  named DATA::SRC. And it's used in hundreds of places throughout our
#  buffoon-monitoring system, so we can't change it. At least we fired the 
#  clown that wrote this, didn't we???)...
sub get_fool_stats {
    my ($filename) = @_;
 
    # Create a temporary version of the hardwired filehandle...
    local *DATA::SRC;
 
    # Open it to the specified file...
    open *DATA::SRC, '<', $filename
        or croak "Can't open $filename: $OS_ERROR";
 
    # Call the legacy subroutine...
    return Bozo::get_data();
}