text: """Utilities to get a password and/or the current user name.
  
  getpass(prompt[, stream]) - Prompt for a password, with echo turned off.
  getuser() - Get the user name from the environment or password database.
  
  GetPassWarning - This UserWarning is issued when getpass() cannot prevent
                   echoing of the password contents while reading.
  
  On Windows, the msvcrt module will be used.
  On the Mac EasyDialogs.AskPassword is used, if available.
  
  """
  
  # Authors: Piers Lauder (original)
  #          Guido van Rossum (Windows support and cleanup)
  #          Gregory P. Smith (tty support & GetPassWarning)
  
  import os, sys, warnings
  
  __all__ = ["getpass","getuser","GetPassWarning"]
  
  
  class GetPassWarning(UserWarning): pass
  
  
  def unix_getpass(prompt='Password: ', stream=None):
      """Prompt for a password, with echo turned off.
  
      Args:
        prompt: Written on stream to ask for the input.  Default: 'Password: '
        stream: A writable file object to display the prompt.  Defaults to
                the tty.  If no tty is available defaults to sys.stderr.
      Returns:
        The seKr3t input.
      Raises:
        EOFError: If our input tty or stdin was closed.
        GetPassWarning: When we were unable to turn echo off on the input.
  
      Always restores terminal settings before returning.
      """
      fd = None
      tty = None
      try:
          # Always try reading and writing directly on the tty first.
          fd = os.open('/dev/tty', os.O_RDWR|os.O_NOCTTY)
          tty = os.fdopen(fd, 'w+', 1)
          input = tty
          if not stream:
              stream = tty
      except EnvironmentError as e:
          # If that fails, see if stdin can be controlled.
          try:
              fd = sys.stdin.fileno()
          except (AttributeError, ValueError):
              passwd = fallback_getpass(prompt, stream)
          input = sys.stdin
          if not stream:
              stream = sys.stderr
  
      if fd is not None:
          passwd = None
          try:
              old = termios.tcgetattr(fd)     # a copy to save
              new = old[:]
              new[3] &= ~(termios.ECHO|termios.ISIG)  # 3 == 'lflags'
              tcsetattr_flags = termios.TCSAFLUSH
              if hasattr(termios, 'TCSASOFT'):
                  tcsetattr_flags |= termios.TCSASOFT
              try:
                  termios.tcsetattr(fd, tcsetattr_flags, new)
                  passwd = _raw_input(prompt, stream, input=input)
              finally:
                  termios.tcsetattr(fd, tcsetattr_flags, old)
                  stream.flush()  # issue7208
          except termios.error as e:
              if passwd is not None:
                  # _raw_input succeeded.  The final tcsetattr failed.  Reraise
                  # instead of leaving the terminal in an unknown state.
                  raise
              # We can't control the tty or stdin.  Give up and use normal IO.
              # fallback_getpass() raises an appropriate warning.
              del input, tty  # clean up unused file objects before blocking
              passwd = fallback_getpass(prompt, stream)
  
      stream.write('\n')
      return passwd
  
  
  def win_getpass(prompt='Password: ', stream=None):
      """Prompt for password with echo off, using Windows getch()."""
      if sys.stdin is not sys.__stdin__:
          return fallback_getpass(prompt, stream)
      import msvcrt
      for c in prompt:
          msvcrt.putwch(c)
      pw = ""
      while 1:
          c = msvcrt.getwch()
          if c == '\r' or c == '\n':
              break
          if c == '\003':
              raise KeyboardInterrupt
          if c == '\b':
              pw = pw[:-1]
          else:
              pw = pw + c
      msvcrt.putwch('\r')
      msvcrt.putwch('\n')
      return pw
  
  
  def fallback_getpass(prompt='Password: ', stream=None):
      warnings.warn("Can not control echo on the terminal.", GetPassWarning,
                    stacklevel=2)
      if not stream:
          stream = sys.stderr
      print("Warning: Password input may be echoed.", file=stream)
      return _raw_input(prompt, stream)
  
  
  def _raw_input(prompt="", stream=None, input=None):
      # This doesn't save the string in the GNU readline history.
      if not stream:
          stream = sys.stderr
      if not input:
          input = sys.stdin
      prompt = str(prompt)
      if prompt:
          stream.write(prompt)
          stream.flush()
      # NOTE: The Python C API calls flockfile() (and unlock) during readline.
      line = input.readline()
      if not line:
          raise EOFError
      if line[-1] == '\n':
          line = line[:-1]
      return line
  
  
  def getuser():
      """Get the username from the environment or password database.
  
      First try various environment variables, then the password
      database.  This works on Windows as long as USERNAME is set.
  
      """
  
      import os
  
      for name in ('LOGNAME', 'USER', 'LNAME', 'USERNAME'):
          user = os.environ.get(name)
          if user:
              return user
  
      # If this fails, the exception will "explain" why
      import pwd
      return pwd.getpwuid(os.getuid())[0]
  
  # Bind the name getpass to the appropriate function
  try:
      import termios
      # it's possible there is an incompatible termios from the
      # McMillan Installer, make sure we have a UNIX-compatible termios
      termios.tcgetattr, termios.tcsetattr
  except (ImportError, AttributeError):
      try:
          import msvcrt
      except ImportError:
          try:
              from EasyDialogs import AskPassword
          except ImportError:
              getpass = fallback_getpass
          else:
              getpass = AskPassword
      else:
          getpass = win_getpass
  else:
      getpass = unix_getpass
  