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Subject: Re: bash pipe race condition
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Date: Tue, 03 Oct 2017 20:39:46 -0700
From: Kaz Kylheku <920-082-4242 AT kylheku DOT com>
In-Reply-To: <33e9d184-03b1-5fa5-4c1a-0cca19571a3a@gmail.com>
References: <B05F4669-BE32-4C5C-B366-555CE37A6761 AT mcgillis DOT org> <33e9d184-03b1-5fa5-4c1a-0cca19571a3a AT gmail DOT com>
Message-ID: <3b4549f8494b5b4062e90eecc1dfc356@mail.kylheku.com>
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On 03.10.2017 05:56, cyg Simple wrote:
> On 10/2/2017 9:06 PM, Matthew McGIllis wrote:
>> If I use the same code from bash I get:
>> 
>> $ ./input.exe | ./simple.exe
>> line1
>> <—— Hangs indefinitely until you kill it or ctrl-c
>> 
>> Some how if input has a delay between its line output then things will 
>> get hung, if you remove the sleep from the input things work, add the 
>> sleep in it fails.
>> 
>> 
>> input.exe is generate from input.vb using: vbc input.vb
[ ... ]
> 
> It is a known issue of the PTY emulation between a Cygwin runtime and a
> Windows runtime enabled app.  It just cannot be fixed.  You're even
> lucky that it works in the Windows command shell.

Lucky? Are VB console apps known to have unreliable piping when
used from the Windows command processor?

> Either convert
> simple.vb to simple.c and use Cygwin's gcc to build it or create a
> Windows runtime version of input.exe.

Isn't that what "input.exe is generate[d] from input.vb using: vbc 
input.vb"
is referring to?


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