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

[Stefan Monnier]

> 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

I think a more idiomatic way to do that would be to use a global Lisp
var that's let-bound in read-passwd.

> +      else if (hide_chars && (c == 127)) /* DEL */
> +     {
> +       /* Unfortunately, we cannot edit stdout.  */
> +       // fprintf (stdout, "%c", c);
> +       /* Hmm, this doesn't work for multi-byte characters.  */
> +       (len > 0) && len--;
> +     }

I don't think that's worth the trouble.


        Stefan