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Date: Sat, 21 Feb 2026 02:06:05 +0900
To: cygwin AT cygwin DOT com
Subject: Re: dynamic conpty loading
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From: Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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Hi Thomas,

On Mon, 16 Feb 2026 16:27:39 +0100
Thomas Wolff <towo AT towo DOT net> wrote:

> Hi Takashi,
> 
> Am 12.12.2025 um 09:23 schrieb Thomas Wolff via Cygwin:
> > Am 11.12.2025 um 23:46 schrieb Takashi Yano via Cygwin:
> >> On Thu, 11 Dec 2025 15:01:14 +0100
> >> Thomas Wolff wrote:
> >>> Hi Takashi,
> >>>
> >>> Am 11.12.2025 um 13:06 schrieb Takashi Yano via Cygwin:
> >>>> Hi Thomas,
> >>>>
> >>>> Thanks for the reply.
> >>>>
> >>>> On Thu, 11 Dec 2025 10:45:52 +0100
> >>>> Thomas Wolff wrote:
> >>>>> Hi Takashi,
> >>>>> sorry, I just saw this mail right now.
> >>>>>
> >>>>> Am 06.12.2025 um 22:40 schrieb Takashi Yano via Cygwin:
> >>>>>> Hi Thomas,
> >>>>>>
> >>>>>> On Sat, 6 Dec 2025 18:48:29 +0100
> >>>>>> Thomas Wolff wrote:
> >>>>>>> Am 03.12.2025 um 13:49 schrieb Takashi Yano via Cygwin:
> >>>>>>>> On Wed, 3 Dec 2025 11:34:01 +0000 (UTC)
> >>>>>>>> matthew patton wrote:
> >>>>>>>>> the libopenconsole.postinstall script ihas some glaring issues.
> >>>>>>>>>
> >>>>>>>>> * define strings once and then use the variable instead of 
> >>>>>>>>> repeating over and over and over the long-ass path names.
> >>>>>>>>>
> >>>>>>>>> * the wget to STDOUT strikes me as pointless. use curl if 
> >>>>>>>>> you're going to resort to that kind of operation. Otherwise 
> >>>>>>>>> just save the .zip to disk already without gratuitous memory 
> >>>>>>>>> buffering
> >>>>>>>>>
> >>>>>>>>> * /tmp should not be assumed. use $TMPDIR
> >>>>>>>>>
> >>>>>>>>> * use trap to clean up after yourself in both the successful 
> >>>>>>>>> and unsuccessful cases
> >>>>>>>>>
> >>>>>>>>> * 'POSTFIX' makes no sense. it's ARCH or PLATFORM
> >>>>>>>>>
> >>>>>>>>> * personally I would have versions.txt be a tab deliminted 
> >>>>>>>>> file with version_num\tsha256 of x64\tsha256 of x86 or 
> >>>>>>>>> something along those lines.
> >>>>>>>> Thanks!
> >>>>>>> Unfortunately, this does not work for me on Windows 10.
> >>>>>>> And I cannot test on Windows 11; my previous report was bogus, I
> >>>>>>> self-compiled the unpatched cygwin1.dll for a cross-test but it 
> >>>>>>> fails.
> >>>>>>> Running bash from a Windows console, then Cygwin console works, 
> >>>>>>> also
> >>>>>>> running wsl from there. Running `mintty -h alw` says
> >>>>>>> The handle is invalid.
> >>>>>>> Error code: Bash/Service/ERROR_INVALID_HANDLE
> >>>>>> Thansk for testing.
> >>>>>> Do you mean `mintty -h alw` works on self-compiled-unpatched
> >>>>>> cygwin1.dll but does not work on self-compiled-patched cygwin1.dll?
> >>>>> No, I mean in my Windows 11 system, it failed even with a 
> >>>>> self-compiled
> >>>>> unpatched cygwin1.dll, right now.
> >>>>> (I was having cygwin build problems before...)
> >>>>> So I took a fresh approach, fresh git clone, then followed the
> >>>>> cumbersome build instructions (which I had put into my own configure
> >>>>> wrapper and used to work before).
> >>>>> Not quite understanding the purpose of that package, or the 
> >>>>> postinstall
> >>>>> script which told me
> >>>>> cat: /etc/libopenconsole/version.txt: No such file or directory
> >>>>> sha256sum:
> >>>>> /etc/libopenconsole/Microsoft.WindowsTerminal__x64.zip.sha256: No 
> >>>>> such
> >>>>> file or directory
> >>>>> , I just copied OpenConsole.exe manually into /bin. And yes, now it
> >>>>> works in Windows 11, even with OpenConsole from WT 1.23 (which is 
> >>>>> a bit
> >>>>> surprising as there was a bug which they fixed later).
> >>>>>
> >>>>> Copied the solution to Windows 10 but unfortunately it does not work
> >>>>> there. Kind regards Thomas
> >>>> What happens in Windows 10 case? Does cygwin itself start and it
> >>>> has a problem when starting non-cygwin app? Or does not start at all?
> >>> No, wsl was running normally, just the fixes of terminal interworking
> >>> (esp. character attributes, test file attached) did not work.
> >>> ...
> >>>
> >>>> In my environment, patched cygwin1.dll works under both Win10 and 11.
> >>> Well, yeah, I gave it a fresh go under Win10 as well and miraculously
> >>> now it works!
> >>> With OpenConsole from either 1.23, 1.24 pre-release, or 1.25 "canary".
> >>> Thanks a lot for making this work.
> >> Thanks for testing and the test file.
> >> With mintty 3.8.1, the test script works with the following settings,
> >> with/without wls in mintty window.
> >>
> >> Show bold: as font
> >> Allow blinking: on
> >> Show dif as fot: on
> >>
> >> Without OpenConsole.exe, "5: text blinking" and "6: text blinking 
> >> rapidly"
> >> are the same result and "CMYK colour" does not work while all attributes
> >> work with OpenConsole.exe.
> > Actually, with the original Windows conhost.exe in $WINDIR/System32 
> > (size 867KB),
> > all attributes in the test file except normal blinking are broken for 
> > me; bold is the only one rendered but enforces white colour.
> > The patch plus OpenConsole.exe fixes this, not only for wsl but also 
> > for Windows console programs, test case
> > cmd /C type xtextattr1
> >
> > Another test case:
> > wsl sh -c '/bin/echo -e "\e[c\e[>c"'
> >
> >> Thanks!
> > Thanks to you. Will the patch be available as a cygwin release or 
> > prerelease soon?
> > Thomas
> >
> I'd like to bundle this solution with mintty for the wsltty standalone 
> package. I could bundle a patched version but I'd prefer an official 
> release or at least test release for publishing.
> I haven't seen this patch yet in the git repository, when will it be 
> ready for cygwin 3.7.0?

I've just submitted a patch series for OpenConsole.exe support
to cygwin-patches AT cygwin DOT com.

Please wait for review.

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

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