1 """Utilities to get a password and/or the current user name.
3 getpass(prompt) - prompt for a password, with echo turned off
4 getuser() - get the user name from the environment or password database
6 On Windows, the msvcrt module will be used.
7 On the Mac EasyDialogs.AskPassword is used, if available.
11 # Authors: Piers Lauder (original)
12 # Guido van Rossum (Windows support and cleanup)
16 __all__ = ["getpass","getuser"]
18 def unix_getpass(prompt='Password: ', stream=None):
19 """Prompt for a password, with echo turned off.
20 The prompt is written on stream, by default stdout.
22 Restore terminal settings at end.
28 fd = sys.stdin.fileno()
30 return default_getpass(prompt)
32 old = termios.tcgetattr(fd) # a copy to save
35 new[3] = new[3] & ~termios.ECHO # 3 == 'lflags'
37 termios.tcsetattr(fd, termios.TCSADRAIN, new)
38 passwd = _raw_input(prompt, stream)
40 termios.tcsetattr(fd, termios.TCSADRAIN, old)
46 def win_getpass(prompt='Password: ', stream=None):
47 """Prompt for password with echo off, using Windows getch()."""
48 if sys.stdin is not sys.__stdin__:
49 return default_getpass(prompt, stream)
56 if c == '\r' or c == '\n':
59 raise KeyboardInterrupt
68 def default_getpass(prompt='Password: ', stream=None):
70 ctl = open("/dev/consctl", "w")
73 buf = _raw_input(prompt, stream)
79 buf = _raw_input(prompt, stream)
82 def _raw_input(prompt="", stream=None):
83 # A raw_input() replacement that doesn't save the string in the
84 # GNU readline history.
91 line = sys.stdin.readline()
100 """Get the username from the environment or password database.
102 First try various environment variables, then the password
103 database. This works on Windows as long as USERNAME is set.
109 for name in ('LOGNAME', 'USER', 'LNAME', 'USERNAME'):
110 user = os.environ.get(name)
114 # If this fails, the exception will "explain" why
116 return pwd.getpwuid(os.getuid())[0]
118 # Bind the name getpass to the appropriate function
121 # it's possible there is an incompatible termios from the
122 # McMillan Installer, make sure we have a UNIX-compatible termios
123 termios.tcgetattr, termios.tcsetattr
124 except (ImportError, AttributeError):
125 getpass = default_getpass
127 getpass = unix_getpass