From: Thomas Wolff <towo@towo.net>
To: Takashi Yano <takashi.yano@nifty.ne.jp>, cygwin-developers@cygwin.com
Subject: Re: New implementation of pseudo console support (experimental)
Date: Wed, 13 May 2020 14:35:00 +0200 [thread overview]
Message-ID: <64bf0288-ff90-69b0-fbd9-fad4dd5903e6@towo.net> (raw)
In-Reply-To: <20200513211609.011d188c3a735b00d55591df@nifty.ne.jp>
Hi Takashi,
Am 13.05.2020 um 14:16 schrieb Takashi Yano via Cygwin-developers:
> Hello everyone.
>
> This time, I have experimentally implemented a new pseudo console
> support. In this implementation, pseudo console is created for each
> native console app.
>
> The advantage and disadvantage of this implementation are as follows.
>
> Advantage:
> 1) No performance degradation in pty output for cygwin process.
> https://sourceware.org/pipermail/cygwin/2020-February/243651.html
> 2) Free from the problem caused by difference of behaviour of control
> sequences between real terminal and pseudo console.
> https://sourceware.org/pipermail/cygwin/2019-December/243074.html
> https://sourceware.org/pipermail/cygwin/2020-February/243648.html
> 3) Free from the problem in cgdb and emacs gud.
> https://sourceware.org/pipermail/cygwin/2020-January/243394.html
> https://sourceware.org/pipermail/cygwin/2020-March/243939.html
> 4) Redrawing screen on executing native console apps is not necessary.
> 5) cygwin-console-helper is not necessary for the pseudo console support.
Sounds great. I'd like to test that soon (if I could...)
> Disadvantage:
> 1) Pseudo console is disabled if one of stdin, stdout or stderr is
> redirected.
> 2) Pseudo console is disabled if the native console app is executed
> in background.
> 3) The cygwin program which call console API directly does not work.
> 4) The apps which use console API cannot be debugged with gdb.
> 5) Type ahead key inputs are discarded while native console app is
> executed.
> 6) cmd.exe hangs up on typing some keys if cmd.exe is executed in
> background. (same as cygwin 3.0.7)
> 7) Code page cannot be changed by chcp.com.
About 1), 2), 7): Can you explain this limitation? I'd assume e.g. a
background process would decide for itself whether to hook in conpty
before starting the native app, so why does it make a difference?
> The patch attached is for the current git head.
>
> Could you please test? Any comments and suggestions will be appreciated.
Thanks
Thomas
next prev parent reply other threads:[~2020-05-13 12:35 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-13 12:16 Takashi Yano
2020-05-13 12:35 ` Thomas Wolff [this message]
2020-05-14 9:28 ` Takashi Yano
2020-05-14 9:34 ` Takashi Yano
2020-05-16 0:29 ` Takashi Yano
2020-05-16 7:47 ` Takashi Yano
2020-05-19 13:40 ` Takashi Yano
2020-05-25 10:53 ` Takashi Yano
2020-05-25 15:22 ` Corinna Vinschen
2020-05-25 19:16 ` Thomas Wolff
2020-05-26 1:00 ` Takashi Yano
2020-05-26 7:14 ` Thomas Wolff
2020-05-26 9:21 ` Takashi Yano
2020-05-26 9:32 ` Thomas Wolff
2020-05-26 8:33 ` Corinna Vinschen
2020-05-26 1:09 ` Takashi Yano
2020-05-28 15:40 ` Takashi Yano
2020-05-29 15:30 ` Corinna Vinschen
2020-05-30 7:36 ` Takashi Yano
2020-05-30 13:14 ` Takashi Yano
2020-05-30 17:43 ` Corinna Vinschen
2020-05-31 5:52 ` Takashi Yano
2020-07-01 11:47 ` Takashi Yano
2020-07-17 11:19 ` Corinna Vinschen
2020-07-17 12:47 ` Thomas Wolff
2020-07-17 14:59 ` Thomas Wolff
2020-07-18 5:05 ` Takashi Yano
2020-07-18 20:57 ` Thomas Wolff
2020-07-23 17:17 ` Takashi Yano
2020-07-27 17:10 ` Thomas Wolff
2020-07-17 12:52 ` Ken Brown
2020-07-18 5:07 ` Takashi Yano
2020-07-18 5:30 ` Takashi Yano
2020-07-20 8:06 ` Corinna Vinschen
2020-07-21 18:17 ` Takashi Yano
2020-07-22 8:45 ` Takashi Yano
2020-07-22 11:49 ` Corinna Vinschen
2020-07-22 12:13 ` Ken Brown
2020-07-23 0:33 ` Takashi Yano
2020-07-24 5:38 ` Takashi Yano
2020-07-24 11:22 ` Takashi Yano
2020-08-02 12:01 ` Corinna Vinschen
2020-08-03 2:05 ` Takashi Yano
2020-08-03 10:50 ` Corinna Vinschen
2020-08-03 2:11 ` Takashi Yano
2020-08-03 12:23 ` Takashi Yano
2020-08-11 11:12 ` Takashi Yano
2020-08-13 9:58 ` Takashi Yano
2020-08-17 11:57 ` Takashi Yano
2020-08-19 11:39 ` Takashi Yano
2020-08-19 13:41 ` Corinna Vinschen
2020-08-19 15:43 ` Thomas Wolff
2020-08-19 20:47 ` Mark Geisert
2020-08-20 8:02 ` Takashi Yano
2020-08-31 12:49 ` Johannes Schindelin
2020-08-31 14:14 ` Takashi Yano
[not found] ` <20200831231253.332c66fdddb33ceed5f61db6@nifty.ne.jp>
2020-08-31 14:22 ` Johannes Schindelin
2020-08-31 14:53 ` Takashi Yano
2020-08-31 15:56 ` Johannes Schindelin
2020-08-31 16:12 ` Thomas Wolff
2020-08-31 17:39 ` Thomas Wolff
2020-08-31 19:17 ` Johannes Schindelin
2020-08-31 19:37 ` Corinna Vinschen
2020-09-01 4:46 ` Johannes Schindelin
2020-09-01 9:23 ` Takashi Yano
2020-09-01 6:32 ` Johannes Schindelin
2020-09-01 22:33 ` Takashi Yano
2020-09-02 6:13 ` Johannes Schindelin
2020-09-01 9:42 ` Takashi Yano
2020-08-31 21:07 ` Thomas Wolff
2020-08-31 23:23 ` Takashi Yano
2020-09-01 5:00 ` Johannes Schindelin
2020-09-01 8:56 ` Thomas Wolff
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