Re: dynamic conpty loading

On 2025-12-05 02:52, Takashi Yano via Cygwin wrote:
> Hi Corinna,
> Thanks for the comment.
> On Thu, 4 Dec 2025 12:01:58 +0100
> Corinna Vinschen wrote:
>> On Dec  3 17:56, Takashi Yano via Cygwin wrote:
>>> Subject: [PATCH v2] Cygwin: pty: Experimental OpenConsole.exe support
>> Some commit message here?  Yeah, I know, it's just experimental for now :)
>>
>>> Signed-off-by: Takashi Yano <[email protected]>
>>> +  size_t towrite = len;
>>> +
>>>     ssize_t ret;
>>>     char *p = (char *) ptr;
>>>     termios &ti = tc ()->ti;
>>> @@ -2152,7 +2284,7 @@ fhandler_pty_master::write (const void *ptr, size_t len)
>>>   	 If the reply for "CSI6n" is divided into multiple writes,
>>>   	 pseudo console sometimes does not recognize it.  Therefore,
>>>   	 put them together into wpbuf and write all at once. */
>>> -      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.

https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h4-Functions-using-CSI-_-ordered-by-the-final-character-lparen-s-rparen:CSI-Ps-c.1CA3

Responses include \e [ ? # # c 6 for base ctl seq plus term type e.g. 64 from 
mintty; plus ";" separated attributes up to 7 (round to 8) each single digit and 
8 double digit => 6 + 16 + 24 <= 46
e.g. for mintty \e[?64;1;2;4;6;9;11;15;21;22;28;29c => 6 + 10 + 18 = 34

Could default to column width if longer to allow room for prompts and titles; 
max parameter value lengths are 5 digits; text strings may be longer; querying 
8/16/88/256 colour palettes or similar could require more space.

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

WSL should work on ARM and reports of uname say aarch64.
-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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