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Date: Fri, 5 Dec 2025 21:09:19 +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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On Fri, 5 Dec 2025 12:11:47 +0100
Corinna Vinschen wrote:
> On Dec  5 18:52, Takashi Yano via Cygwin wrote:
> > On Thu, 4 Dec 2025 12:01:58 +0100
> > Corinna Vinschen wrote:
> > > Aren't from here on two patches folded into one?  All but one hunk (the
> > > one calling CreatePseudoConsole_new) seem to be entirely independent of
> > > OpenConsole.
> > 
> > This part is necessary to work with OpenConsle.exe. OpenConsole.exe uses
> > also ESC[c during startup while conhost.exe uses only ESC[6n.
> 
> Ok, but ESC[c is a stock vt100 sequence.  Admittedly, I have no idea if
> there are other terminals out there which use this sequence at startup,
> too...
> 
> > > > -      static const int wpbuf_len = strlen ("\033[32768;32868R");
> > > > +      static const int wpbuf_len = 64; /* for response to CSI6n nad CSIc */
> > > 
> > > Is there some macro for the count of 64 in this context, by any chance?
> > 
> > I'm not sure for now that 64 is really enough for the responce to ESC[c.
> > mintty returns about 30 byte responce. But some other terminal may return
> > longer responce.
> 
> Per the vt100 documentation, the response is supposed to be
> 
>   ESC [ ? 1 ; Ps c
> 
> with Ps being a character in the range 0 - 7.
> 
> Just being curious, what are mintty and OpenConsole returning?

mintty: ESC[?64;1;2;4;6;9;11;15;21;22;28;29c
xterm:  ESC[?64;1;2;3;4;6;9;15;16;17;18;21;22;28;29c
WindowsTerminal: ESC[?61;4;6;7;14;21;22;23;24;28;32;42;52c
conhost.exe:     ESC[?61;1;6;7;21;22;23;24;28;32;42;52c
urxvt:  ESC[?1;2c
putty:  ESC[?6c
TeraTerm: ESC[?1;2c

> > > > [...]
> > > > if [ $(uname -m) = "x86_64" ]
> > > > then
> > > > 	POSTFIX="x64"
> > > > else
> > > > 	POSTFIX="x86"
> > > 
> > > Do we really want a 32 bit version?  Isn't there an aarch64 version?
> > 
> > No.
> 
> Weird.  But Windows on AArch64 supports a x86_64 emulation, iiuc.

Ah, sorry. I meant "No, we do not want 32 bit version."

> > What should we assume result of "uname -m" in aarch64 machine?
> 
> "aarch64" :)

Thanks.

> > > For a start, this may be ok, but we should really try to build our own
> > > OpenConsole package build by our own gcc or clang, IMHO.
> > 
> > OpenConsole.exe also uses WIL, so it looks not easy to build it in cygwin
> > environment.
> > 
> > Maybe just getting it from https://github.com/microsoft/wil/ is enough,
> > but I have not tried it yet.
> 
> Oh, wow!  Looks like fixes to build WIL on MingW have been merged just a
> couple of hours ago.

Thanks!
I'll try to build OpenConsole + WIL under cygwin environment
when I have time.

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

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