DMARC-Filter:	OpenDMARC Filter v1.4.2 delorie.com 5AQAWl7T2904304
Authentication-Results:	delorie.com; dmarc=pass (p=none dis=none) header.from=cygwin.com
Authentication-Results:	delorie.com; spf=pass smtp.mailfrom=cygwin.com
DKIM-Filter:	OpenDKIM Filter v2.11.0 delorie.com 5AQAWl7T2904304
Authentication-Results:	delorie.com;
	dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=kXacm3L2
X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 9639D3858D38
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1764153165;
	bh=M+kuarZHzm6zUGytnzHEPG85Zf1RoKC0vKvQDGHjEXk=;
	h=Date:To:Subject:In-Reply-To:References:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=kXacm3L2Zx/eDAJhFhMqbTWQpmHG3qXWB1rhQ2/ZiTxUs5xJR0kKidMWv/Uh/sC//
	lOPh+HyMfeSfCKvyHJLd0T4XPSDvKso8kha/uf4cNITSZbkBH+Ru/+nC+Q7Si+Bfa8
	r99vR7MhodAftKiusCJN3Yz/ZrlwqKGRuvwtzmSo=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.4.2 sourceware.org 366413858D32
ARC-Filter:	OpenARC Filter v1.0.0 sourceware.org 366413858D32
ARC-Seal:	i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1764153142; cv=none;
	b=fzvspJlrnowW2/xknyX3sCJxFxQJGhAU29xI0nlgzTPH5Vt7EcjvuwRgOO/5uEs07L1SmrIMr3q30Iz9hoeUJ2APTpdfkADuwv6uJMgxrq0ri03NHEHbrpPndypz7QG3FmL0XfTN7RKBFgDeJLUU5za4XydeFDitaMUFOL5aS8c=
ARC-Message-Signature:	i=1; a=rsa-sha256; d=sourceware.org; s=key;
	t=1764153142; c=relaxed/simple;
	bh=wt+T3LTJazXJOFYghPYi1l1YSGzPKrDecyZLgLdip3g=;
	h=Date:From:To:Subject:Message-Id:Mime-Version:DKIM-Signature;
	b=BW6hXaJMLX1q8YFFRdA+f02Kqjs+99iME2X0fA/8EqsiQ6jlWGc9AB7Qq1Lz/mNtOXcGC7w08mfOM2GEfQu4+v72E/XQ550JxSy+d6J5KgZcKiHn7/qYmtnd+Ajy6GfQZeVRJWsvPGl7m8XdI8U1G+4ogL5ruUUdkAAyoWwHgVE=
ARC-Authentication-Results:	i=1; server2.sourceware.org
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 366413858D32
Date:	Wed, 26 Nov 2025 19:32:20 +0900
To:	cygwin AT cygwin DOT com
Subject:	Re: dynamic conpty loading
Message-Id:	<20251126193220.1b890f58a121add2f0d05fa5@nifty.ne.jp>
In-Reply-To:	<cc6b613b-1c02-41e3-b045-5b1723b706ab@towo.net>
References:	<f52d9663-b210-497a-867b-5193b420ea0b AT towo DOT net>
	<30deef29-ba20-49d9-9b38-28020941b0ef AT towo DOT net>
	<707f4d4c-a20d-4f1d-bdbd-65a2392dea15 AT towo DOT net>
	<20251121190433 DOT 4a37dc959848a0aea89a8922 AT nifty DOT ne DOT jp>
	<62f3c1ae-1fd9-477d-a837-d865094dab06 AT towo DOT net>
	<aSCXcoeDbrGOrUTu AT calimero DOT vinschen DOT de>
	<cc6b613b-1c02-41e3-b045-5b1723b706ab AT towo DOT net>
X-Mailer:	Sylpheed 3.7.0 (GTK+ 2.24.30; i686-pc-mingw32)
Mime-Version:	1.0
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.30
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe:	<https://cygwin.com/mailman/options/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<https://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From:	Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
Errors-To:	cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

On Fri, 21 Nov 2025 17:58:01 +0100
Thomas Wolff wrote:

> Am 21.11.2025 um 17:46 schrieb Corinna Vinschen via Cygwin:
> > Hi Thomas,
> >
> > On Nov 21 16:46, Thomas Wolff via Cygwin wrote:
> >> Am 21.11.2025 um 11:04 schrieb Takashi Yano via Cygwin:
> >>> On Sun, 5 Oct 2025 10:15:55 +0200
> >>> Thomas Wolff wrote:
> >>>>>> The procedure seems to be:
> >>>>>> try LoadLibrary("conpty.dll"), (if not successful, fallback to
> >>>>>> GetModuleHandle("kernel32") instead) to retrieve GetProcAddress for
> >>>>>> CreatePseudoConsole, ResizePseudoConsole, ClosePseudoConsole, and
> >>>>>> then somehow (?) use those while calling CreateProcess.
> >>>>>> The latter is woven into the cygwin library and I don't think it's a
> >>>>>> good idea to clone that out of cygwin for a patched process creation
> >>>>>> in mintty.
> >>>>>>
> >>>>>> My question/suggestion:
> >>>>>> Can a cygwin mode switch to a selected conpty library instead of the
> >>>>>> default one please?
> > Where do you expect this conpty.dll to reside?
> >
> > If we do something like that, I would suggest to make sure that this
> > conpty.dll is in a well-defined place. /bin or /lib might be a good
> > idea. And if it exists in this defined place, it will be used by Cygwin.
> >
> > We can tweak the autoload mechanism to allow a primary DLL and a fallback
> > DLL, that drops the need to set the CYWIN env var.
> >
> > The mintty package could contain a post-install script, or some other
> > script in /bin to allow a user with admin rights downloading the latest
> > (or the most sensible) conpty.dll from MSFT.
> >
> > Would that make sense?
> >
> >
> > Corinna
> >
> That makes much sense, yes, thank you. /bin/conpty.dll would probably be 
> a good place.

I checked the source of conpty.dll
https://github.com/microsoft/terminal/blob/main/src/winconpty/winconpty.cpp

conpty.dll seems to launch OpenConsole.exe in the directory where
WindowsTerminal is installed.
However, BUILTIN\Users does not have permission to execute OpenConsole.exe.

Do you have some idea how to solve this problem?
WindowsTerminal itself can launch OpenConsole.exe, so there should be
some solutions, I think.

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

- Raw text -