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| 54 | <H2><A NAME="SECTION0010810000000000000000"> |
| 55 | 8.8.1 Example</A> |
| 56 | </H2> |
| 57 | <A NAME="termios_Example"></A> |
| 58 | <P> |
| 59 | Here's a function that prompts for a password with echoing turned |
| 60 | off. Note the technique using a separate <tt class="function">tcgetattr()</tt> call |
| 61 | and a <tt class="keyword">try</tt> ... <tt class="keyword">finally</tt> statement to ensure that the |
| 62 | old tty attributes are restored exactly no matter what happens: |
| 63 | |
| 64 | <P> |
| 65 | <div class="verbatim"><pre> |
| 66 | def getpass(prompt = "Password: "): |
| 67 | import termios, sys |
| 68 | fd = sys.stdin.fileno() |
| 69 | old = termios.tcgetattr(fd) |
| 70 | new = termios.tcgetattr(fd) |
| 71 | new[3] = new[3] & ~termios.ECHO # lflags |
| 72 | try: |
| 73 | termios.tcsetattr(fd, termios.TCSADRAIN, new) |
| 74 | passwd = raw_input(prompt) |
| 75 | finally: |
| 76 | termios.tcsetattr(fd, termios.TCSADRAIN, old) |
| 77 | return passwd |
| 78 | </pre></div> |
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| 114 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> |
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