require 'rubygems'
require 'net/ldap' #gem install --no-rdoc --no-ri net-ldap

ldap = Net::LDAP.new :host => "172.16.138.142",
     :port => 389,
     :auth => {
           :method => :simple,
           :username => "cn=admin,o=novell",
           :password => "n0v3ll"
     }

filter = Net::LDAP::Filter.eq("cn", "jj*")
treebase = "o=novell"
attrs = ["mail", "cn", "sn", "objectclass", "loginTime"]

ldap.search(:base => treebase, :filter => filter, :attributes => attrs) do |entry|
  puts "DN: #{entry.dn}"
  entry.each do |attribute, values|
    puts "   #{attribute}:"
    values.each do |value|
      puts "      --->#{value}"
    end
  end
end

p ldap.get_operation_result