my %CFG = ();
# See if you can guess what this is for
sub getCfg
{
        my $Cfg = shift;
        my $cfg = shift;
        my $cFg = $Cfg;
        my $CFg = $ENV{CFG};
        my $cFG = $ENV{ $Cfg };

        die "CFG is not defined $!" if not defined( $CFg );
        return $cFG if defined( $cFG );
        $cFG = $ENV{ "CFG_" . $Cfg };
        return $cFG if defined( $cFG );
        if( scalar( %CFG ) < 1 ) {
           tie %CFG, 'Tie::Cfg', READ => $CFg;
        }
        foreach $cfg (keys %CFG) {
           my $cfG = "CFG_" . $cfg . "_" . $CFG{$cfg} . "_" . $cFg;
           $cFG = $ENV{ $cfG };
           return $cFG if defined( $cFG );
           foreach my $CfG (keys %CFG) {
              if( $CfG ne $cfg ) {
                 $cfG = "CFG_" . $cfg . "_" . $CFG{$cfg} . "_"
                       . $CfG . "_" . $CFG{$CfG} . "_" . $cFg;
                 $cFG = $ENV{ $cfG };
                 return $cFG if defined( $cFG );
              }      
           }
        }
        $cFG = cfg( $Cfg );
        return $cFG;   
}

sub cfg
{
        my $env = shift;
        my $Env =     0;
        my $eNv = undef;
        my $enV = undef;
        foreach $eNv (keys %ENV) {
          $Env ++ if( $eNv =~ ".*${env}\$" );
          $enV = $eNv if $Env == 1 and not defined( $enV );
          die "\n$env is ambiguous $!\n" if $Env > 1;
        }
        if( $Env == 1 ) {
          return $ENV{ $enV };
        }
        return undef;
}

[download]

Replies are listed 'Best First'.
Re: Cfg
by K_M_McMahon (Hermit) on May 11, 2005 at 05:05 UTC
    I must be missing something. You have 2 subroutines and nothing that calls either one in the main code block? As is, this does nothing.

    On the other hand, I like the obfu concept of using the same variable in different ways by chainging the capitalization.....

    -Kevin 
    my $a='62696c6c77667269656e6440676d61696c2e636f6d';
while ($a=~m/(^.{2})/s)
{print unpack('A',pack('H*',"$1"));$a=~s/^.{2}//s;}

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Re: Cfg
by cristian (Hermit) on May 11, 2005 at 13:55 UTC 
    
???????????????????????????????????????????

perl -e '$nothing_look = sub { print shift} 
and  $nothing_look->("where is result ???") 
unless !show_result_not_look_nothing_obfu;'

???????????????????????????????????????????

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Re: Cfg
by jdalbec (Deacon) on May 12, 2005 at 01:59 UTC
    If $ENV{CFG} points to a config file of the form 
    a=b
c=d

    [download]
    and you call getCfg('e') then it returns (in order of preference): 
    $ENV{e}
$ENV{CFG_e}
$ENV{CFG_a_b_e}
$ENV{CFG_a_b_c_d_e}
$ENV{CFG_c_d_e}
$ENV{CFG_c_d_a_b_e}

    [download]
    and if none of those are defined it looks for a unique environment variable whose name ends in 'e' (if there's more than one, then it's an error).

    I can't imagine how you could end up with all these oddly named environment variables. Google doesn't help much. Maybe some kind of i18n/l10n settings?

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