Re: Emacs 23.1 flushes stdin on startup

[Kevin Rodgers]

Johan Bockgård wrote:
> "David F. Skoll" <dfs@roaringpenguin.com> writes:
>
> > I've noticed a behavior change in 23.1 that doesn't seem to be documented:
> > If I start Emacs in text mode (eg: "emacs -nw") and type stuff before
> > Emacs has started up, the stuff I type is lost.  Version 22 would not
> > flush the input, and my pre-startup stuff would appear in the buffer.
>
> It's caused by the xterm init code (info "(elisp) Terminal-Specific")
> for finding out if the terminal is modern enough to support the
> `modifyOtherKeys' feature; see term/xterm.el.
>
>       [...]
>       ;; Pending input can be mistakenly returned by the calls to
>       ;; read-event below.  Discard it.
>       (discard-input)
>       ;; Try to find out the type of terminal by sending a "Secondary
>       ;; Device Attributes (DA)" query.
>       (send-string-to-terminal "\e[>0c")
>
> > I really miss the old behavior.  Is there any way to convince Emacs 23.1
> > not to flush stdin on startup?
>
> There's no simple knob, unfortunately, but there's always some way.

Too bad discard-input doesn't return the discarded events, so that they
could be re-read via unread-command-events.

--
Kevin Rodgers
Denver, Colorado, USA