From owner-freebsd-questions@FreeBSD.ORG  Tue Dec  4 08:27:24 2012
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
 by hub.freebsd.org (Postfix) with ESMTP id 71957597
 for <freebsd-questions@freebsd.org>; Tue,  4 Dec 2012 08:27:24 +0000 (UTC)
 (envelope-from freebsd-questions@m.gmane.org)
Received: from plane.gmane.org (plane.gmane.org [80.91.229.3])
 by mx1.freebsd.org (Postfix) with ESMTP id 1ECA68FC0C
 for <freebsd-questions@freebsd.org>; Tue,  4 Dec 2012 08:27:23 +0000 (UTC)
Received: from list by plane.gmane.org with local (Exim 4.69)
 (envelope-from <freebsd-questions@m.gmane.org>) id 1Tfnqk-0001X6-S3
 for freebsd-questions@freebsd.org; Tue, 04 Dec 2012 09:27:33 +0100
Received: from 79-139-19-75.prenet.pl ([79.139.19.75])
 by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
 id 1AlnuQ-0007hv-00
 for <freebsd-questions@freebsd.org>; Tue, 04 Dec 2012 09:27:30 +0100
Received: from jb.1234abcd by 79-139-19-75.prenet.pl with local (Gmexim 0.1
 (Debian)) id 1AlnuQ-0007hv-00
 for <freebsd-questions@freebsd.org>; Tue, 04 Dec 2012 09:27:30 +0100
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-questions@freebsd.org
From: jb <jb.1234abcd@gmail.com>
Subject: Re: bash pipe redirection gets stuck
Date: Tue, 4 Dec 2012 08:27:00 +0000 (UTC)
Lines: 20
Message-ID: <loom.20121204T092200-174@post.gmane.org>
References: <23353.144.36.114.84.1354545315.squirrel@mail.rule.lv>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Complaints-To: usenet@ger.gmane.org
X-Gmane-NNTP-Posting-Host: sea.gmane.org
User-Agent: Loom/3.14 (http://gmane.org/)
X-Loom-IP: 79.139.19.75 (Mozilla/5.0 (X11; FreeBSD i386;
 rv:9.0.1) Gecko/20100101 Firefox/9.0.1)
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
 <mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 04 Dec 2012 08:27:24 -0000

 <long <at> rule.lv> writes:

> 
> Dear all,
> I stumbled upon a problem where multiple pipe redirection occasionally get
> stuck when trying to get sha256 sum of a stream.
> 
> You can try to reproduce the problem if you have /usr/ports/shells/bash
> installed (output redirection used in this command is possible only in
> bash).
> Create temporary test file with command: "dd if=/dev/urandom of=/tmp/file1
> bs=1k count=10"
> And the command I'm using is:
> /usr/local/bin/bash -c 'cat /tmp/file1 | tee >(/sbin/sha256 >
> /tmp/file1.sha256) > /tmp/file1.copy' ; echo $status

I could reproduce it on FreeBSD 9.0-RELEASE-p3 on 3rd try, but after upgrade
of bash-4.1.11 to bash-4.2.37 it works (tested 30 times).
jb