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bug#17839: 24.4.50; read-passwd echoes password input in non-interactive


From: Michael Albinus
Subject: bug#17839: 24.4.50; read-passwd echoes password input in non-interactive sessions
Date: Thu, 10 Jul 2014 16:36:43 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux)

Stefan Monnier <address@hidden> writes:

> If someone is motivated, I would even accept a patch that turns echo off
> temporarily.

Well, I've tried this 'cos I believe it is important. The idea is to
give the prompt in read-passwd the text property 'hide-chars. In
noninteractive mode, emacs writes "." instead of echoing the password
while typing. You can test it with

# emacs -batch -eval '(progn (message (read-string "Prompt1: ")) (message 
(read-passwd "Prompt2: ")) (message (read-string "Prompt3: ")))'

The patch is not perfect (it doesn't handled multi-byte chars, and I
have tested it only under Gnu/Linux), but it is a first step.

Comments?

>         Stefan

Best regards, Michael.

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