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Date: Tue, 02 Apr 2002 07:56:30 -0800
To: Stuart Brady <sbrady AT ntlworld DOT com>, Cygwin <cygwin AT cygwin DOT com>
From: Randall R Schulz <rrschulz AT cris DOT com>
Subject: Re: Bash bug? - piped loops using builtin echo and stdout
In-Reply-To: <Pine.LNX.4.44.0204021320320.1603-100000@calypso.arrow>
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Stuart,

I have the same installation you report (Win2K) and cannot reproduce your 
problem. Hundreds of iterations work just fine.

I do notice that on my two-CPU system this loop will consume almost 90% of 
the available CPU cycles and about 3/4 of that is kernel mode (as displayed 
by the "Performance" tab of the "Windows Task Manager").

You don't say much about what is "going wrong," though, so it's hard to 
hypothesize a problem.

Someone (but not me) might get something from the cygcheck output you 
mention. Personally, I prefer it in an attachment since it makes searching 
my local mail archive less likely to pick up a posting with in-line 
cygcheck output. Cygcheck output is not spam.

Randall Schulz
Mountain View, CA USA


At 06:54 2002-04-02, Stuart Brady wrote:
>With bash, is the behaviour of "while( true ); do echo foo; /bin/echo bar; 
>done | cat" defined? Is it reasonable for me to expect to see "foo", 
>"bar", "foo", "bar", and so on? With an interactive bash, this isn't what 
>happens when I actually type the command in (i.e. sourcing or executing a 
>script works fine). It only starts going wrong at around the 12th 
>iteration. I can't see anything in the archives, and STFW didn't help 
>either. Can anyone else reproduce this?
>
>I'm using Win2k with Cygwin 1.3.10-1 and bash 2.05a-3. This also occurs on 
>Win98 with the same versions of Cygwin and bash, but does not occur on Red 
>Hat 7.2 with bash 2.05-8, nor does it occur on Red Hat 7.0 with bash 
>2.04-11. Should I post the output of cygcheck -s -r -v here, since I'm not 
>sure that this is even a bug, and am reluctant to spam people?
>--
>Stuart Brady


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