module Process

def create(args)
  unless args.is_a?(Hash)
    raise TypeError, "hash keyword arguments expected"
  end
  valid_keys = %w{
    app_name command_line inherit creation_flags cwd environment
    startup_info thread_inherit process_inherit close_handles with_logon
    domain password
  }
  valid_si_keys = %w{
    startf_flags desktop title x y x_size y_size x_count_chars
    y_count_chars fill_attribute sw_flags stdin stdout stderr
  }
  # Set default values
  hash = {
    "app_name"       => nil,
    "creation_flags" => 0,
    "close_handles"  => true,
  }
  # Validate the keys, and convert symbols and case to lowercase strings.
  args.each { |key, val|
    key = key.to_s.downcase
    unless valid_keys.include?(key)
      raise ArgumentError, "invalid key '#{key}'"
    end
    hash[key] = val
  }
  si_hash = {}
  # If the startup_info key is present, validate its subkeys
  if hash["startup_info"]
    hash["startup_info"].each { |key, val|
      key = key.to_s.downcase
      unless valid_si_keys.include?(key)
        raise ArgumentError, "invalid startup_info key '#{key}'"
      end
      si_hash[key] = val
    }
  end
  # The +command_line+ key is mandatory unless the +app_name+ key
  # is specified.
  unless hash["command_line"]
    if hash["app_name"]
      hash["command_line"] = hash["app_name"]
      hash["app_name"] = nil
    else
      raise ArgumentError, "command_line or app_name must be specified"
    end
  end
  env = nil
  # The env string should be passed as a string of ';' separated paths.
  if hash["environment"]
    env = hash["environment"]
    unless env.respond_to?(:join)
      env = hash["environment"].split(File::PATH_SEPARATOR)
    end
    env = env.map { |e| e + 0.chr }.join("") + 0.chr
    env.to_wide_string! if hash["with_logon"]
  end
  # Process SECURITY_ATTRIBUTE structure
  process_security = nil
  if hash["process_inherit"]
    process_security = SECURITY_ATTRIBUTES.new
    process_security[:nLength] = 12
    process_security[:bInheritHandle] = 1
  end
  # Thread SECURITY_ATTRIBUTE structure
  thread_security = nil
  if hash["thread_inherit"]
    thread_security = SECURITY_ATTRIBUTES.new
    thread_security[:nLength] = 12
    thread_security[:bInheritHandle] = 1
  end
  # Automatically handle stdin, stdout and stderr as either IO objects
  # or file descriptors. This won't work for StringIO, however. It also
  # will not work on JRuby because of the way it handles internal file
  # descriptors.
  #
  %w{stdin stdout stderr}.each { |io|
    if si_hash[io]
      if si_hash[io].respond_to?(:fileno)
        handle = get_osfhandle(si_hash[io].fileno)
      else
        handle = get_osfhandle(si_hash[io])
      end
      if handle == INVALID_HANDLE_VALUE
        ptr = FFI::MemoryPointer.new(:int)
        if windows_version >= 6 && get_errno(ptr) == 0
          errno = ptr.read_int
        else
          errno = FFI.errno
        end
        raise SystemCallError.new("get_osfhandle", errno)
      end
      # Most implementations of Ruby on Windows create inheritable
      # handles by default, but some do not. RF bug #26988.
      bool = SetHandleInformation(
        handle,
        HANDLE_FLAG_INHERIT,
        HANDLE_FLAG_INHERIT
      )
      raise SystemCallError.new("SetHandleInformation", FFI.errno) unless bool
      si_hash[io] = handle
      si_hash["startf_flags"] ||= 0
      si_hash["startf_flags"] |= STARTF_USESTDHANDLES
      hash["inherit"] = true
    end
  }
  procinfo  = PROCESS_INFORMATION.new
  startinfo = STARTUPINFO.new
  unless si_hash.empty?
    startinfo[:cb]              = startinfo.size
    startinfo[:lpDesktop]       = si_hash["desktop"] if si_hash["desktop"]
    startinfo[:lpTitle]         = si_hash["title"] if si_hash["title"]
    startinfo[:dwX]             = si_hash["x"] if si_hash["x"]
    startinfo[:dwY]             = si_hash["y"] if si_hash["y"]
    startinfo[:dwXSize]         = si_hash["x_size"] if si_hash["x_size"]
    startinfo[:dwYSize]         = si_hash["y_size"] if si_hash["y_size"]
    startinfo[:dwXCountChars]   = si_hash["x_count_chars"] if si_hash["x_count_chars"]
    startinfo[:dwYCountChars]   = si_hash["y_count_chars"] if si_hash["y_count_chars"]
    startinfo[:dwFillAttribute] = si_hash["fill_attribute"] if si_hash["fill_attribute"]
    startinfo[:dwFlags]         = si_hash["startf_flags"] if si_hash["startf_flags"]
    startinfo[:wShowWindow]     = si_hash["sw_flags"] if si_hash["sw_flags"]
    startinfo[:cbReserved2]     = 0
    startinfo[:hStdInput]       = si_hash["stdin"] if si_hash["stdin"]
    startinfo[:hStdOutput]      = si_hash["stdout"] if si_hash["stdout"]
    startinfo[:hStdError]       = si_hash["stderr"] if si_hash["stderr"]
  end
  app = nil
  cmd = nil
  # Convert strings to wide character strings if present
  if hash["app_name"]
    app = hash["app_name"].to_wide_string
  end
  if hash["command_line"]
    cmd = hash["command_line"].to_wide_string
  end
  if hash["cwd"]
    cwd = hash["cwd"].to_wide_string
  end
  if hash["with_logon"]
    logon = hash["with_logon"].to_wide_string
    if hash["password"]
      passwd = hash["password"].to_wide_string
    else
      raise ArgumentError, "password must be specified if with_logon is used"
    end
    if hash["domain"]
      domain = hash["domain"].to_wide_string
    end
    hash["creation_flags"] |= CREATE_UNICODE_ENVIRONMENT
    bool = CreateProcessWithLogonW(
      logon,                  # User
      domain,                 # Domain
      passwd,                 # Password
      LOGON_WITH_PROFILE,     # Logon flags
      app,                    # App name
      cmd,                    # Command line
      hash["creation_flags"], # Creation flags
      env,                    # Environment
      cwd,                    # Working directory
      startinfo,              # Startup Info
      procinfo                # Process Info
    )
    unless bool
      raise SystemCallError.new("CreateProcessWithLogonW", FFI.errno)
    end
  else
    inherit = hash["inherit"] ? 1 : 0
    bool = CreateProcessW(
      app,                    # App name
      cmd,                    # Command line
      process_security,       # Process attributes
      thread_security,        # Thread attributes
      inherit,                # Inherit handles?
      hash["creation_flags"], # Creation flags
      env,                    # Environment
      cwd,                    # Working directory
      startinfo,              # Startup Info
      procinfo                # Process Info
    )
    unless bool
      raise SystemCallError.new("CreateProcess", FFI.errno)
    end
  end
  # Automatically close the process and thread handles in the
  # PROCESS_INFORMATION struct unless explicitly told not to.
  if hash["close_handles"]
    CloseHandle(procinfo[:hProcess])
    CloseHandle(procinfo[:hThread])
  end
  ProcessInfo.new(
    procinfo[:hProcess],
    procinfo[:hThread],
    procinfo[:dwProcessId],
    procinfo[:dwThreadId]
  )
end

def get_affinity(int = Process.pid)
  pmask = FFI::MemoryPointer.new(:ulong)
  smask = FFI::MemoryPointer.new(:ulong)
  if int == Process.pid
    unless GetProcessAffinityMask(GetCurrentProcess(), pmask, smask)
      raise SystemCallError, FFI.errno, "GetProcessAffinityMask"
    end
  else
    begin
      handle = OpenProcess(PROCESS_QUERY_INFORMATION, 0 , int)
      if handle == 0
        raise SystemCallError, FFI.errno, "OpenProcess"
      end
      unless GetProcessAffinityMask(handle, pmask, smask)
        raise SystemCallError, FFI.errno, "GetProcessAffinityMask"
      end
    ensure
      CloseHandle(handle)
    end
  end
  [pmask.read_ulong, smask.read_ulong]
end

def get_exitcode(pid)
  handle = OpenProcess(PROCESS_QUERY_INFORMATION, 0, pid)
  if handle == INVALID_HANDLE_VALUE
    raise SystemCallError.new("OpenProcess", FFI.errno)
  end
  begin
    buf = FFI::MemoryPointer.new(:ulong, 1)
    unless GetExitCodeProcess(handle, buf)
      raise SystemCallError.new("GetExitCodeProcess", FFI.errno)
    end
  ensure
    CloseHandle(handle)
  end
  exitcode = buf.read_int
  if exitcode == STILL_ACTIVE
    nil
  else
    exitcode
  end
end

def get_heap_info(handle)
  hash = Hash.new { |h, k| h[k] = [] }
  hl = HEAPLIST32.new
  hl[:dwSize] = hl.size
  if Heap32ListFirst(handle, hl)
    while Heap32ListNext(handle, hl)
      he = HEAPENTRY32.new
      he[:dwSize] = he.size
      if Heap32First(he, Process.pid, hl[:th32HeapID])
        hash[he[:th32ProcessID]] << HeapSnapInfo.new(he[:dwAddress], he[:dwBlockSize], he[:dwFlags], he[:th32ProcessID], he[:th32HeapID])
      else
        if FFI.errno == ERROR_NO_MORE_FILES
          break
        else
          raise SystemCallError.new("Heap32First", FFI.errno)
        end
      end
      hash[he[:th32ProcessID]] << HeapSnapInfo.new(he[:dwAddress], he[:dwBlockSize], he[:dwFlags], he[:th32ProcessID], he[:th32HeapID]) while Heap32Next(he)
    end
  end
  hash
end

def get_module_info(handle)
  hash = Hash.new { |h, k| h[k] = [] }
  me = MODULEENTRY32.new
  me[:dwSize] = me.size
  if Module32First(handle, me)
    hash[me[:th32ProcessID]] << ModuleSnapInfo.new(
      me[:th32ProcessID],
      me[:modBaseAddr].to_i,
      me[:modBaseSize],
      me[:hModule],
      me[:szModule].to_s,
      me[:szExePath].to_s
    )
  else
    if FFI.errno == ERROR_NO_MORE_FILES
      return hash
    else
      raise SystemCallError.new("Module32First", FFI.errno)
    end
  end
  while Module32Next(handle, me)
    hash[me[:th32ProcessID]] << ModuleSnapInfo.new(
      me[:th32ProcessID],
      me[:modBaseAddr].to_i,
      me[:modBaseSize],
      me[:hModule],
      me[:szModule].to_s,
      me[:szExePath].to_s
    )
  end
  hash
end

def get_process_info(handle)
  hash = Hash.new { |h, k| h[k] = [] }
  pe = PROCESSENTRY32.new
  pe[:dwSize] = pe.size
  if Process32First(handle, pe)
    hash[pe[:th32ProcessID]] = ProcessSnapInfo.new(
      pe[:th32ProcessID],
      pe[:cntThreads],
      pe[:th32ParentProcessID],
      pe[:pcPriClassBase],
      pe[:dwFlags],
      pe[:szExeFile].to_s
    )
  else
    if FFI.errno == ERROR_NO_MORE_FILES
      return hash
    else
      raise SystemCallError.new("Process32First", FFI.errno)
    end
  end
  while Process32Next(handle, pe)
    hash[pe[:th32ProcessID]] = ProcessSnapInfo.new(
      pe[:th32ProcessID],
      pe[:cntThreads],
      pe[:th32ParentProcessID],
      pe[:pcPriClassBase],
      pe[:dwFlags],
      pe[:szExeFile].to_s
    )
  end
  hash
end

def get_thread_info(handle, pid = nil)
  lpte = THREADENTRY32.new
  lpte[:dwSize] = lpte.size
  hash = Hash.new { |h, k| h[k] = [] }
  if Thread32First(handle, lpte)
    hash[lpte[:th32OwnerProcessID]] << ThreadSnapInfo.new(lpte[:th32ThreadID], lpte[:th32OwnerProcessID], lpte[:tpBasePri])
  else
    if FFI.errno == ERROR_NO_MORE_FILES
      return hash
    else
      raise SystemCallError.new("Thread32First", FFI.errno)
    end
  end
  hash[lpte[:th32OwnerProcessID]] << ThreadSnapInfo.new(lpte[:th32ThreadID], lpte[:th32OwnerProcessID], lpte[:tpBasePri]) while Thread32Next(handle, lpte)
  hash
end

def getpriority(kind, int)
  raise TypeError, kind unless kind.is_a?(Integer) # Match spec
  raise TypeError, int unless int.is_a?(Integer)   # Match spec
  int = Process.pid if int == 0 # Match spec
  handle = OpenProcess(PROCESS_QUERY_INFORMATION, 0, int)
  if handle == 0
    raise SystemCallError, FFI.errno, "OpenProcess"
  end
  begin
    priority = GetPriorityClass(handle)
    if priority == 0
      raise SystemCallError, FFI.errno, "GetPriorityClass"
    end
  ensure
    CloseHandle(handle)
  end
  priority
end

def getrlimit(resource)
  if resource == RLIMIT_FSIZE
    if volume_type == "NTFS"
      return ((1024**4) * 4) - (1024 * 64) # ~ 4TB
    else
      return (1024**3) * 4 # 4 GB
    end
  end
  handle = nil
  in_job = Process.job?
  # Put the current process in a job if it's not already in one
  if in_job && defined?(@win32_process_job_name)
    handle = OpenJobObjectA(JOB_OBJECT_QUERY, 1, @win32_process_job_name)
    raise SystemCallError, FFI.errno, "OpenJobObject" if handle == 0
  else
    @win32_process_job_name = "ruby_" + Process.pid.to_s
    handle = CreateJobObjectA(nil, @win32_process_job_name)
    raise SystemCallError, FFI.errno, "CreateJobObject" if handle == 0
  end
  begin
    unless in_job
      unless AssignProcessToJobObject(handle, GetCurrentProcess())
        raise Error, get_last_error
      end
    end
    ptr = JOBJECT_EXTENDED_LIMIT_INFORMATION.new
    val = nil
    # Set the LimitFlags member of the struct
    case resource
      when RLIMIT_CPU
        ptr[:BasicLimitInformation][:LimitFlags] = JOB_OBJECT_LIMIT_PROCESS_TIME
      when RLIMIT_AS, RLIMIT_VMEM, RLIMIT_RSS
        ptr[:BasicLimitInformation][:LimitFlags] = JOB_OBJECT_LIMIT_PROCESS_MEMORY
      else
        raise ArgumentError, "unsupported resource type: '#{resource}'"
    end
    bool = QueryInformationJobObject(
      handle,
      JobObjectExtendedLimitInformation,
      ptr,
      ptr.size,
      nil
    )
    unless bool
      raise SystemCallError, FFI.errno, "QueryInformationJobObject"
    end
    case resource
      when Process::RLIMIT_CPU
        val = ptr[:BasicLimitInformation][:PerProcessUserTimeLimit][:QuadPart]
      when RLIMIT_AS, RLIMIT_VMEM, RLIMIT_RSS
        val = ptr[:ProcessMemoryLimit]
    end
  ensure
    at_exit { CloseHandle(handle) if handle }
  end
  [val, val]
end

def job?
  pbool = FFI::MemoryPointer.new(:int)
  IsProcessInJob(GetCurrentProcess(), nil, pbool)
  pbool.read_int == 1 ? true : false
end

def kill(signal, *pids)
  # Match the spec, require at least 2 arguments
  if pids.length == 0
    raise ArgumentError, "wrong number of arguments (1 for at least 2)"
  end
  # Match the spec, signal may not be less than zero if numeric
  if signal.is_a?(Numeric) && signal < 0 # EINVAL
    raise SystemCallError.new(22)
  end
  # Match the spec, signal must be a numeric, string or symbol
  unless signal.is_a?(String) || signal.is_a?(Numeric) || signal.is_a?(Symbol)
    raise ArgumentError, "bad signal type #{signal.class}"
  end
  # Match the spec, making an exception for BRK/SIGBRK, if the signal name is invalid.
  # Older versions of JRuby did not include KILL, so we've made an explicit exception
  # for that here, too.
  if signal.is_a?(String) || signal.is_a?(Symbol)
    signal = signal.to_s.sub("SIG", "")
    unless Signal.list.keys.include?(signal) || %w{KILL BRK}.include?(signal)
      raise ArgumentError, "unsupported name '#{signal}'"
    end
  end
  # If the last argument is a hash, pop it and assume it's a hash of options
  if pids.last.is_a?(Hash)
    hash = pids.pop
    opts = {}
    valid = %w{exit_proc dll_module wait_time}
    hash.each { |k, v|
      k = k.to_s.downcase
      unless valid.include?(k)
        raise ArgumentError, "invalid option '#{k}'"
      end
      opts[k] = v
    }
    exit_proc  = opts["exit_proc"]  || "ExitProcess"
    dll_module = opts["dll_module"] || "kernel32"
    wait_time  = opts["wait_time"]  || 5
  else
    wait_time  = 5
    exit_proc  = "ExitProcess"
    dll_module = "kernel32"
  end
  count = 0
  pids.each { |pid|
    raise TypeError unless pid.is_a?(Numeric) # Match spec, pid must be a number
    raise SystemCallError.new(22) if pid < 0  # Match spec, EINVAL if pid less than zero
    sigint = [Signal.list["INT"], "INT", "SIGINT", :INT, :SIGINT, 2]
    # Match the spec
    if pid == 0 && !sigint.include?(signal)
      raise SystemCallError.new(22)
    end
    if signal == 0
      access = PROCESS_QUERY_INFORMATION | PROCESS_VM_READ
    elsif signal == 9
      access = PROCESS_TERMINATE
    else
      access = PROCESS_ALL_ACCESS
    end
    begin
      handle = OpenProcess(access, 0, pid)
      if signal != 0 && handle == 0
        raise SystemCallError, FFI.errno, "OpenProcess"
      end
      case signal
        when 0
          if handle != 0
            count += 1
          else
            if FFI.errno == ERROR_ACCESS_DENIED
              count += 1
            else
              raise SystemCallError.new(3) # ESRCH
            end
          end
        when Signal.list["INT"], "INT", "SIGINT", :INT, :SIGINT, 2
          if GenerateConsoleCtrlEvent(CTRL_C_EVENT, pid)
            count += 1
          else
            raise SystemCallError.new("GenerateConsoleCtrlEvent", FFI.errno)
          end
        when Signal.list["BRK"], "BRK", "SIGBRK", :BRK, :SIGBRK, 3
          if GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, pid)
            count += 1
          else
            raise SystemCallError.new("GenerateConsoleCtrlEvent", FFI.errno)
          end
        when Signal.list["KILL"], "KILL", "SIGKILL", :KILL, :SIGKILL, 9
          if TerminateProcess(handle, pid)
            count += 1
          else
            raise SystemCallError.new("TerminateProcess", FFI.errno)
          end
        else
          thread_id = FFI::MemoryPointer.new(:ulong)
          mod = GetModuleHandle(dll_module)
          if mod == 0
            raise SystemCallError.new("GetModuleHandle: '#{dll_module}'", FFI.errno)
          end
          proc_addr = GetProcAddress(mod, exit_proc)
          if proc_addr == 0
            raise SystemCallError.new("GetProcAddress: '#{exit_proc}'", FFI.errno)
          end
          thread = CreateRemoteThread(handle, nil, 0, proc_addr, nil, 0, thread_id)
          if thread > 0
            WaitForSingleObject(thread, wait_time)
            count += 1
          else
            raise SystemCallError.new("CreateRemoteThread", FFI.errno)
          end
      end
    ensure
      CloseHandle(handle) if handle
    end
  }
  count
end

def setpriority(kind, int, int_priority)
  raise TypeError unless kind.is_a?(Integer)          # Match spec
  raise TypeError unless int.is_a?(Integer)           # Match spec
  raise TypeError unless int_priority.is_a?(Integer)  # Match spec
  int = Process.pid if int == 0                       # Match spec
  handle = OpenProcess(PROCESS_SET_INFORMATION, 0 , int)
  if handle == 0
    raise SystemCallError, FFI.errno, "OpenProcess"
  end
  begin
    unless SetPriorityClass(handle, int_priority)
      raise SystemCallError, FFI.errno, "SetPriorityClass"
    end
  ensure
    CloseHandle(handle)
  end
  0 # Match the spec
end

def setrlimit(resource, current_limit, max_limit = nil)
  max_limit = current_limit
  handle = nil
  in_job = Process.job?
  unless [RLIMIT_AS, RLIMIT_VMEM, RLIMIT_RSS, RLIMIT_CPU].include?(resource)
    raise ArgumentError, "unsupported resource type: '#{resource}'"
  end
  # Put the current process in a job if it's not already in one
  if in_job && defined? @win32_process_job_name
    handle = OpenJobObjectA(JOB_OBJECT_SET_ATTRIBUTES, 1, @win32_process_job_name)
    raise SystemCallError, FFI.errno, "OpenJobObject" if handle == 0
  else
    @win32_process_job_name = "ruby_" + Process.pid.to_s
    handle = CreateJobObjectA(nil, @win32_process_job_name)
    raise SystemCallError, FFI.errno, "CreateJobObject" if handle == 0
  end
  begin
    unless in_job
      unless AssignProcessToJobObject(handle, GetCurrentProcess())
        raise SystemCallError, FFI.errno, "AssignProcessToJobObject"
      end
    end
    ptr = JOBJECT_EXTENDED_LIMIT_INFORMATION.new
    # Set the LimitFlags and relevant members of the struct
    if resource == RLIMIT_CPU
      ptr[:BasicLimitInformation][:LimitFlags] = JOB_OBJECT_LIMIT_PROCESS_TIME
      ptr[:BasicLimitInformation][:PerProcessUserTimeLimit][:QuadPart] = max_limit
    else
      ptr[:BasicLimitInformation][:LimitFlags] = JOB_OBJECT_LIMIT_PROCESS_MEMORY
      ptr[:ProcessMemoryLimit] = max_limit
    end
    bool = SetInformationJobObject(
      handle,
      JobObjectExtendedLimitInformation,
      ptr,
      ptr.size
    )
    unless bool
      raise SystemCallError, FFI.errno, "SetInformationJobObject"
    end
  ensure
    at_exit { CloseHandle(handle) if handle }
  end
end

def snapshot(info_type = "thread")
  case info_type.to_s.downcase
    when "thread"
      flag = TH32CS_SNAPTHREAD
    when "heap"
      flag = TH32CS_SNAPHEAPLIST
    when "module"
      flag = TH32CS_SNAPMODULE
    when "process"
      flag = TH32CS_SNAPPROCESS
    else
      raise ArgumentError, "info_type '#{info_type}' unsupported"
  end
  begin
    handle = CreateToolhelp32Snapshot(flag, Process.pid)
    if handle == INVALID_HANDLE_VALUE
      raise SystemCallError.new("CreateToolhelp32Snapshot", FFI.errno)
    end
    case info_type.to_s.downcase
      when "thread"
        array = get_thread_info(handle)
      when "heap"
        array = get_heap_info(handle)
      when "module"
        array = get_module_info(handle)
      when "process"
        array = get_process_info(handle)
    end
    array
  ensure
    CloseHandle(handle) if handle
  end
end

def uid(sid = false)
  token = FFI::MemoryPointer.new(:ulong)
  raise TypeError unless sid.is_a?(TrueClass) || sid.is_a?(FalseClass)
  unless OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, token)
    raise SystemCallError, FFI.errno, "OpenProcessToken"
  end
  token   = token.read_ulong
  rlength = FFI::MemoryPointer.new(:ulong)
  tuser   = 0.chr * 512
  bool = GetTokenInformation(
    token,
    TokenUser,
    tuser,
    tuser.size,
    rlength
  )
  unless bool
    raise SystemCallError, FFI.errno, "GetTokenInformation"
  end
  string_sid = tuser[FFI.type_size(:pointer) * 2, (rlength.read_ulong - FFI.type_size(:pointer) * 2)]
  if sid
    string_sid
  else
    psid = FFI::MemoryPointer.new(:uintptr_t)
    unless ConvertSidToStringSidA(string_sid, psid)
      raise SystemCallError, FFI.errno, "ConvertSidToStringSid"
    end
    psid.read_pointer.read_string.split("-").last.to_i
  end
end

def volume_type
  buf = FFI::MemoryPointer.new(:char, 32)
  bool = GetVolumeInformationA(nil, nil, 0, nil, nil, nil, buf, buf.size)
  bool ? buf.read_string : nil
end

def windows_version
  ver = OSVERSIONINFO.new
  ver[:dwOSVersionInfoSize] = ver.size
  unless GetVersionExA(ver)
    raise SystemCallError.new("GetVersionEx", FFI.errno)
  end
  ver[:dwMajorVersion]
end