This code prepends a path to an NT enviromental %PATH%.

Having this code: 
#!/usr/bin/perl -w
use strict;

my $Registry;
my $newpath='C:\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";
#Prepend to path

if ($path->[0] =~ /$newpath/ )
{

    print "$newpath is already in your PATH\n";
}
else
{
print "Here\n";    
    $path->[0]= $newpath . "$path->[0]";
    print "Path is now $path->[0]\n";
    $env->{"/PATH"}= $path or die "Can't set PATH: $^E\n"
}

[download]
I know my bug is in the if ($path->[0] =~ /$newpath/ ) statement, but I'm not sure how to fix the bug. How can I search for $newpath without searching for the regular expression $newpath?

Thanks in advance.

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

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.