Here's the final code. I implemented Zaxo's suggestion.

Thanks to all who helped. Hope you find this code useful! 

#!/usr/bin/perl -w
=pod
This script adds paths into the system path.

Simply change @newpaths to reflect the directories you'd like to add.

Author:
P. Rivera

Portions inspired by:
Marza/Perlmonks, node 156805; Zaxo and various monks, node 190779
=cut

use strict;

my $Registry;
my $newpath;
my @newpaths=('P:\Scripts\Admin','P:\Scripts\Anly','P:\Perl\bin');

use Win32::TieRegistry ( TiedRef=>\$Registry, Delimiter=>"/", ArrayVal
+ues=>1 );

my $env= $Registry->{"LMachine/System/CurrentControlSet/Control/".
                     "Session Manager/Environment/"}
    or  die "Can't open CCS/SM/Env: $^E\n";
my $path= $env->{"/PATH"}  or die "Can't get PATH: $^E\n";

print "Path currently is $path->[0]\n\n";

print "-" x 65 . "\n";

for $newpath (@newpaths)
{
        
        print "Attempting to prepend $newpath to path.\n\n";

        #See if new path is the system PATH
        if ($path->[0] =~ /\Q$newpath\E/ )
        {
                
                print "$newpath is already in your system PATH. Not ad
+ded again.\n";
        }
        else
        {
                $path->[0]= $newpath . ";$path->[0]";
                print "Path is now $path->[0]\n\n";
                $env->{"/PATH"}= $path or print "Can't set PATH!!: $^E
+\n";
        }

        print "-" x 65 . "\n";
}

[download]

In reply to Re: Trying to determine if path exists in environmental variable by slojuggler
in thread Trying to determine if path exists in environmental variable by slojuggler

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