best ldap search package

Hi

Since there are so many ldap packages there any idea which is the best
one currently ?

I just need to do simple thing. I need to find out common name (cn) by
using ldapsearch
for the ENV variable REMOTE_USER ie. user's login name.

Any ideas and possible way to do this ?

Thanks

and I dont need to authenticate just anonymous search will do

ok i found simple answer by using ruby net-ldap module

http://rubyforge.org/projects/net-ldap/

require 'rubygems'
require 'net/ldap'

ldap = Net::LDAP.new :host => 'your-host-name-here',
      :port => 389,
      :auth => {
            :method => :anonymous
      }

login = request.env['REMOTE_USER']

filter = Net::LDAP::Filter.eq( "uid", login )
treebase = "ou=company,ou=people,o=us"

ldap.search( :base => treebase, :filter => filter ) do |entry|
@fullname = entry[:cn]