[PATCH] Strange behavior of cmd.exe when hammered with clear screen operations from Cygwin program.
Corinna Vinschen
corinna-cygwin@cygwin.com
Mon Aug 1 08:51:00 GMT 2016
On Jul 29 08:59, Kaz Kylheku wrote:
> On 29.07.2016 03:39, Corinna Vinschen wrote:
> > I applied a patch to perform this action. It's in the latest
> > 2.6.0-0.5 test release I just announced.
> [...]
> I've done some interactive testing with this using
> the interpreter for a Lisp dialect. I would evaluate
> this expression to generate a 5 second delay and then
> a clear screen VT100 sequence:
>
> (progn (usleep 5000000) (put-string "\e[2J"))
>
> during this time, I would scroll the buffer somewhere.
>
> I also tested with a cursor position somewhere in the
> middle of the window, having issued:
>
> (put-string "\e[12H")
>
> The programming language details don't matter; we
> could do this with bash echo $'\e...' and sleep 5.
> [...]
> With the third patch, I've run into behavior in which the
> display isn't cleared at all if the clear is issued
> in a scrolled-back state.
I can't reproduce this. If I don't click wildly on the scroll bat at
the time the clear screen action takes place (so I move the window right
after clear screen), the cursor is positioned at the top of the screen,
at the end of the buffer. So, how would I reproduce your observation so
that all window positioning is guaranteed to take place *before* the
clear screen action and still see the broken output?
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: not available
URL: <http://cygwin.com/pipermail/cygwin/attachments/20160801/7e2e033d/attachment.sig>
More information about the Cygwin
mailing list