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Re: [h-e-w] issue with emacs and msvcrt getch(?)

From: Eli Zaretskii
Subject: Re: [h-e-w] issue with emacs and msvcrt getch(?)
Date: Wed, 04 May 2011 06:02:43 -0400

> Date: Tue, 3 May 2011 19:54:06 -0400
> From: "E. S." <address@hidden>
> A few months ago I tried running the db2 CLP from within emacs but it kept
> hanging at the password prompt. I noticed similar behavior if, in python, I
> used getpass.getpass(). That function works fine until I get to
> msvcrt.getch(), which hangs in the python comint buffer (using
> python-mode.el if anybody's interested). The getpass function loops like
> this:
> while 1:
>     c = msvcrt.getch()
>     if c == '\r' or c == '\n':
>         break
>     ...
>     else:
>         pw = pw + c
> If I modify slightly and check just msvcrt.kbhit() in a loop to see if any
> keystroke ever gets noticed, that function never returns true; I thought
> that maybe it was just a getch thing. I can only guess that the db2 CLP is
> also trying to make a low-level call to the windows api, but it's not
> working correctly from within emacs (outside of emacs everything works
> fine).

Could this have something to do with the fact that Emacs has a
separate input thread that wants to get keyboard inputs from the same
console?  Could it be that Emacs and getch fight for the same inputs,
and Emacs wins?

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