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From:	Biswapriyo Nath <nathbappai AT gmail DOT com>
Date:	Sat, 31 Aug 2019 02:51:34 +0530
Message-ID:	<CALK-3mKnHy5tGzi4kkf7CZ4m-6x1fGwBsk=bc8Jv1KFoU_reHA@mail.gmail.com>
Subject:	Re: [ANNOUNCEMENT] TEST: Cygwin 3.1.0-0.3
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
X-IsSubscribed:	yes

On Friday, August 30, 2019, Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp> wrote:

> If ioctl(TIOCSWINSZ, ...)
is called from other process, it fails.

The HPCON isn't a handle. It's a pointer of a struct of three handles. In
my opinion, I think it's consistent with pty functions in libc. Like in
forkpty(2) the pid is returned in master side, here HPCON is same.

Q: From which process do you want to access it?

To know more about the ConPTY internals here are two of my sample program:

* XConPty: https://github.com/Biswa96/XConPty
* wslbridge2: https://github.com/Biswa96/wslbridge2/tree/master/rawpty

** Do not use that code in cygwin. It's undocumented. **

Thank you <3

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