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In-Reply-To:	<629feb60-a3b2-6368-8eb5-83def841130b@cornell.edu>
From:	David Karr <davidmichaelkarr AT gmail DOT com>
Date:	Sun, 28 Jul 2019 18:29:45 -0700
Message-ID:	<CAA5t8Vq-xVvEgfWt+QYea=x5-rvrLs_jMNdAqUOp6eXC=U+PPA@mail.gmail.com>
Subject:	Re: Piping input from subprocess loses track of temp file
To:	Ken Brown <kbrown AT cornell DOT edu>
Cc:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
X-IsSubscribed:	yes

On Sat, Jul 27, 2019 at 8:40 AM Ken Brown wrote:

> On 7/19/2019 2:27 PM, David Karr wrote:
> > I believe the relevant part of my cygwin version info is
> "3.0.7(0.338/5/3)"
> > (from uname -a output).
> >
> > I'm working on a script where one step executes a process where the input
> > is taking from a subprocess, like this:
> >
> >      someprocess <(cat $outfile | sed -e "s/${property}[
> > ]*=.*$/${property}=${newValue}/")  ...
> >
> > When I run this, I see:
> >
> >      error: error reading /dev/fd/62: The system cannot find the path
> > specified.
>
> I just ran into a possibly similar problem:
>
>    https://cygwin.com/ml/cygwin/2019-07/msg00230.html,
>
> although in my case I could only reproduce it under X11.  Are you running
> under
> X11 when you see your problem?  And can you boil it down to a simple test
> case
> or, barring that, send your script and reproduction instructions?
>
> Ken
>

Well, what's curious is that I thought I was running under X11, but now I
see that I'm not running the server.

What's even stranger is that this isn't happening anymore, or at least it's
not happening today.  I guess that means there's some sort of race
condition in play here, which is really annoying.

I'm even running the exact same command line that I was running before
(that is, passing the same parameters to the script that calls the process
that had this problem).

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