On Wed, 26 Aug 2020 19:36:06 +0200 Corinna Vinschen wrote: > On Aug 26 21:00, Takashi Yano via Cygwin-patches wrote: > > Pseudo console generates escape sequences on execution of non-cygwin > > apps. If the terminal does not support escape sequence, output will > > be garbled. This patch prevents garbled output in dumb terminal by > > disabling pseudo console. > > I'm a bit puzzled by this patch. We had code handling emacs and dumb > terminals explicitely in the early forms of the first incarnation of > the pseudo tty code, but fortunately you found a way to handle this > without hardcoding terminal types into Cygwin. Why do you think we > have to do this now?
What previously disccussed was the problem that the clearing screen at pty startup displays garbage (^[[H^[[2J) in emacs. Finally, this was settled by eliminating clear-screen and triggering redraw-screen instead at the first execution of non-cygwin app. However, the problem reported in https://cygwin.com/pipermail/cygwin/2020-August/245983.html still remains. What's worse in the new implementation, pseudo console sends ESC[6n (querying cursor position) internally on startup and waits for a response. This causes hang if pseudo console is started in dumb terminal. This patch is for fixing this issue. -- Takashi Yano <takashi.y...@nifty.ne.jp>
