Viewing file: getpass.py (3.05 KB) -rw-r--r-- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
"""Utilities to get a password and/or the current user name.
getpass(prompt) - prompt for a password, with echo turned off getuser() - get the user name from the environment or password database
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)
import sys
__all__ = ["getpass","getuser"]
def unix_getpass(prompt='Password: '): """Prompt for a password, with echo turned off.
Restore terminal settings at end. """
try: fd = sys.stdin.fileno() except: return default_getpass(prompt)
old = termios.tcgetattr(fd) # a copy to save new = old[:]
new[3] = new[3] & ~termios.ECHO # 3 == 'lflags' try: termios.tcsetattr(fd, termios.TCSADRAIN, new) passwd = _raw_input(prompt) finally: termios.tcsetattr(fd, termios.TCSADRAIN, old)
sys.stdout.write('\n') return passwd
def win_getpass(prompt='Password: '): """Prompt for password with echo off, using Windows getch().""" if sys.stdin is not sys.__stdin__: return default_getpass(prompt) import msvcrt for c in prompt: msvcrt.putch(c) pw = "" while 1: c = msvcrt.getch() if c == '\r' or c == '\n': break if c == '\003': raise KeyboardInterrupt if c == '\b': pw = pw[:-1] else: pw = pw + c msvcrt.putch('\r') msvcrt.putch('\n') return pw
def default_getpass(prompt='Password: '): print "Warning: Problem with getpass. Passwords may be echoed." return _raw_input(prompt)
def _raw_input(prompt=""): # A raw_input() replacement that doesn't save the string in the # GNU readline history. prompt = str(prompt) if prompt: sys.stdout.write(prompt) line = sys.stdin.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 = default_getpass else: getpass = AskPassword else: getpass = win_getpass else: getpass = unix_getpass
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