projects / OpenSPARC-T2-DV / blame
| Commit | Line | Data |
|---|---|---|
| 86530b38 AT |
1 | """Utilities to get a password and/or the current user name. |
| 2 | ||
| 3 | getpass(prompt) - prompt for a password, with echo turned off | |
| 4 | getuser() - get the user name from the environment or password database | |
| 5 | ||
| 6 | On Windows, the msvcrt module will be used. | |
| 7 | On the Mac EasyDialogs.AskPassword is used, if available. | |
| 8 | ||
| 9 | """ | |
| 10 | ||
| 11 | # Authors: Piers Lauder (original) | |
| 12 | # Guido van Rossum (Windows support and cleanup) | |
| 13 | ||
| 14 | import sys | |
| 15 | ||
| 16 | __all__ = ["getpass","getuser"] | |
| 17 | ||
| 18 | def unix_getpass(prompt='Password: '): | |
| 19 | """Prompt for a password, with echo turned off. | |
| 20 | ||
| 21 | Restore terminal settings at end. | |
| 22 | """ | |
| 23 | ||
| 24 | try: | |
| 25 | fd = sys.stdin.fileno() | |
| 26 | except: | |
| 27 | return default_getpass(prompt) | |
| 28 | ||
| 29 | old = termios.tcgetattr(fd) # a copy to save | |
| 30 | new = old[:] | |
| 31 | ||
| 32 | new[3] = new[3] & ~termios.ECHO # 3 == 'lflags' | |
| 33 | try: | |
| 34 | termios.tcsetattr(fd, termios.TCSADRAIN, new) | |
| 35 | passwd = _raw_input(prompt) | |
| 36 | finally: | |
| 37 | termios.tcsetattr(fd, termios.TCSADRAIN, old) | |
| 38 | ||
| 39 | sys.stdout.write('\n') | |
| 40 | return passwd | |
| 41 | ||
| 42 | ||
| 43 | def win_getpass(prompt='Password: '): | |
| 44 | """Prompt for password with echo off, using Windows getch().""" | |
| 45 | if sys.stdin is not sys.__stdin__: | |
| 46 | return default_getpass(prompt) | |
| 47 | import msvcrt | |
| 48 | for c in prompt: | |
| 49 | msvcrt.putch(c) | |
| 50 | pw = "" | |
| 51 | while 1: | |
| 52 | c = msvcrt.getch() | |
| 53 | if c == '\r' or c == '\n': | |
| 54 | break | |
| 55 | if c == '\003': | |
| 56 | raise KeyboardInterrupt | |
| 57 | if c == '\b': | |
| 58 | pw = pw[:-1] | |
| 59 | else: | |
| 60 | pw = pw + c | |
| 61 | msvcrt.putch('\r') | |
| 62 | msvcrt.putch('\n') | |
| 63 | return pw | |
| 64 | ||
| 65 | ||
| 66 | def default_getpass(prompt='Password: '): | |
| 67 | print "Warning: Problem with getpass. Passwords may be echoed." | |
| 68 | return _raw_input(prompt) | |
| 69 | ||
| 70 | ||
| 71 | def _raw_input(prompt=""): | |
| 72 | # A raw_input() replacement that doesn't save the string in the | |
| 73 | # GNU readline history. | |
| 74 | prompt = str(prompt) | |
| 75 | if prompt: | |
| 76 | sys.stdout.write(prompt) | |
| 77 | line = sys.stdin.readline() | |
| 78 | if not line: | |
| 79 | raise EOFError | |
| 80 | if line[-1] == '\n': | |
| 81 | line = line[:-1] | |
| 82 | return line | |
| 83 | ||
| 84 | ||
| 85 | def getuser(): | |
| 86 | """Get the username from the environment or password database. | |
| 87 | ||
| 88 | First try various environment variables, then the password | |
| 89 | database. This works on Windows as long as USERNAME is set. | |
| 90 | ||
| 91 | """ | |
| 92 | ||
| 93 | import os | |
| 94 | ||
| 95 | for name in ('LOGNAME', 'USER', 'LNAME', 'USERNAME'): | |
| 96 | user = os.environ.get(name) | |
| 97 | if user: | |
| 98 | return user | |
| 99 | ||
| 100 | # If this fails, the exception will "explain" why | |
| 101 | import pwd | |
| 102 | return pwd.getpwuid(os.getuid())[0] | |
| 103 | ||
| 104 | # Bind the name getpass to the appropriate function | |
| 105 | try: | |
| 106 | import termios | |
| 107 | # it's possible there is an incompatible termios from the | |
| 108 | # McMillan Installer, make sure we have a UNIX-compatible termios | |
| 109 | termios.tcgetattr, termios.tcsetattr | |
| 110 | except (ImportError, AttributeError): | |
| 111 | try: | |
| 112 | import msvcrt | |
| 113 | except ImportError: | |
| 114 | try: | |
| 115 | from EasyDialogs import AskPassword | |
| 116 | except ImportError: | |
| 117 | getpass = default_getpass | |
| 118 | else: | |
| 119 | getpass = AskPassword | |
| 120 | else: | |
| 121 | getpass = win_getpass | |
| 122 | else: | |
| 123 | getpass = unix_getpass |