From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: Jonathan Nieder <jrnieder@gmail.com>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>
Subject: Re: [PATCH 0/3] mingw: introduce a way to avoid std handle inheritance
Date: Tue, 31 Oct 2017 18:12:46 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.21.1.1710311809570.6482@virtualbox> (raw)
In-Reply-To: <20171030205522.hur26cumwusk7wwa@aiede.mtv.corp.google.com>
Hi Jonathan,
On Mon, 30 Oct 2017, Jonathan Nieder wrote:
> Johannes Schindelin wrote:
>
> > Particularly when calling Git from applications, such as Visual Studio,
> > it is important that stdin/stdout/stderr are closed properly. However,
> > when spawning processes on Windows, those handles must be marked as
> > inheritable if we want to use them, but that flag is a global flag and
> > may very well be used by other spawned processes which then do not know
> > to close those handles.
> >
> > As a workaround, introduce handling for the environment variables
> > GIT_REDIRECT_STD* to read/write from/to named pipes instead
> > (conceptually similar to Unix sockets, for you Linux folks). These do
> > not need to be marked as inheritable, as the process can simply open the
> > named pipe. No global flags. No problems.
> >
> > This feature was introduced as an experimental feature into Git for
> > Windows v2.11.0(2) and has been tested ever since. I feel it is
> > well-tested enough that it can be integrated into core Git.
>
> Can this rationale go in the commit messages?
I thought I had done exactly that in 1/3...
> Actually I wouldn't mind if this were all a single patch, with such a
> rationale in the commit message.
Quite honestly, I'd rather not. There is a logical structure to the three
patches (and I left a Duck in 3/3, to see who bothers to actually read
what I wrote).
The redirection, for example, is a very special thing that I would like to
keep in a separate commit, for clarity.
> The patches' concept seems sane. I haven't looked closely at the
> implementation.
Thanks,
Dscho
next prev parent reply other threads:[~2017-10-31 17:12 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-30 17:10 [PATCH 0/3] mingw: introduce a way to avoid std handle inheritance Johannes Schindelin
2017-10-30 17:10 ` [PATCH 1/3] mingw: add experimental feature to redirect standard handles Johannes Schindelin
2017-10-30 17:10 ` [PATCH 2/3] mingw: special-case GIT_REDIRECT_STDERR=2>&1 Johannes Schindelin
2017-10-30 17:10 ` [PATCH 3/3] mingw: document the experimental standard handle redirection Johannes Schindelin
2017-10-30 18:58 ` Eric Sunshine
2017-10-31 17:08 ` Johannes Schindelin
2017-11-01 4:58 ` Junio C Hamano
2017-11-01 16:37 ` Johannes Schindelin
2017-11-02 1:31 ` Junio C Hamano
2017-11-02 17:20 ` Johannes Schindelin
2017-11-03 1:50 ` Junio C Hamano
2017-11-03 11:51 ` Johannes Schindelin
2017-10-30 20:55 ` [PATCH 0/3] mingw: introduce a way to avoid std handle inheritance Jonathan Nieder
2017-10-31 5:48 ` Junio C Hamano
2017-10-31 17:12 ` Johannes Schindelin [this message]
2017-10-31 18:09 ` Jonathan Nieder
2017-11-01 17:07 ` Johannes Schindelin
2017-11-01 17:17 ` Stefan Beller
2017-11-01 17:10 ` [PATCH v2 " Johannes Schindelin
2017-11-01 17:10 ` [PATCH v2 1/3] mingw: add experimental feature to redirect standard handles Johannes Schindelin
2017-11-01 17:10 ` [PATCH v2 2/3] mingw: optionally redirect stderr/stdout via the same handle Johannes Schindelin
2017-11-01 17:10 ` [PATCH v2 3/3] mingw: document the standard handle redirection Johannes Schindelin
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