gistfile1.rb

  def check_ldap_user(name)
    filter = Net::LDAP::Filter.eq("cn", name)
    treebase = "dc=foo, dc=bar"

    ldap.search(:base => treebase, :filter => filter, :attributes => attrs,
        :return_result => false) do |entry|
      entry.each do |attribute, values|
        values.each do |value|
        end
      end
    end
  end