ch05.011_best

Perl Best Practices the source code

##############################################################################
##   Code fragment (Recommended) from Chapter 5 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;

my @external_results;

use English qw( -no_match_vars );
 
local $OUTPUT_AUTOFLUSH         = 1;

local $SUBSCRIPT_SEPARATOR      = qq{\0};
local $LIST_SEPARATOR           =  q{, };
local $OUTPUT_FIELD_SEPARATOR   =  q{, };
local $OUTPUT_RECORD_SEPARATOR  = qq{\n}; 
 
eval {
    open my $pipe, '/cdrom/install |'
        or croak "open failed: $OS_ERROR";
 
    @external_results = <$pipe>;
 
    close $pipe 
        or croak "close failed: CHILD_ERROR, $OS_ERROR";
};
 
warn "Internal error: $EVAL_ERROR" 
    if $EVAL_ERROR;