This is the mail archive of the
cygwin
mailing list for the Cygwin project.
Re: [Bug] Named Pipes (FIFO) / Bash
- From: Achim Gratz <Stromeko at nexgo dot de>
- To: cygwin at cygwin dot com
- Date: Thu, 14 May 2015 09:44:46 +0200
- Subject: Re: [Bug] Named Pipes (FIFO) / Bash
- Authentication-results: sourceware.org; auth=none
- References: <87ipxgirl7 dot fsf at Rainer dot invalid>
Achim Gratz writes:
> I'm having problems with some bash scripts that were developed (not be
> me) and working OK in Cygwin 1.6.x versions, but not in 1.7.x (tested on
> 1.7.6, 1.7.7 and the latest snapshot). After some gnashing of teeth and
> pulling of hair I've whittled it down to a problem with named pipe
> handling in bash. Sifting through the archives of the mailing lists
> didn't provide much clues. I realize from earlier discussions that
> named pipes aren't fully supported, but some examples of programs and
> scripts seem to indicate that they should at least work on a basic
> level.
>
> I've tried both the current and the just announced experimental version
> of bash and both Windows7/CoreDuo and WinXP/TurionX2 (I don't think the
> dual cores have something to do with the problem, but if necessary I
> should be able to at least boot the WinXP machine with only a single
> core enabled).
>
> $ mkfifo /tmp/pipe
> $ ( sleep 10; echo -n "blafasel "; date; sleep 10; cat < /tmp/pipe )&
> $ echo -n "dingdong "; date; exec 6> /tmp/pipe; echo -n "blumblum "; date
> $ echo -n "hurrdurr " >&6; date
>
> Running this on Linux outputs as expected:
>
> dingdong Sa 22. Jan 20:41:45 CET 2011
> blafasel Sa 22. Jan 20:41:55 CET 2011
> blumblum Sa 22. Jan 20:42:05 CET 2011
> hurrdurr Sa 22. Jan 20:42:05 CET 2011
>
> On Cygwin, I get this:
>
> dingdong Sa 22. Jan 20:41:45 CET 2011
> blumblum Sa 22. Jan 20:41:45 CET 2011
> blafasel Sa 22. Jan 20:41:55 CET 2011
> cat: -: Communication error on send
Blast from the past! I've just tested this again with Cygwin 2.0 and it
finally works correctly.
Regards,
Achim.
--
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+
SD adaptations for KORG EX-800 and Poly-800MkII V0.9:
http://Synth.Stromeko.net/Downloads.html#KorgSDada
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple