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Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures
From: |
Eric Blake |
Subject: |
Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures |
Date: |
Thu, 28 Oct 2010 08:05:27 -0600 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100921 Fedora/3.1.4-1.fc13 Mnenhy/0.8.3 Thunderbird/3.1.4 |
On 10/27/2010 09:30 PM, Paul Eggert wrote:
> OpenBSD /bin/sh, and some other sh variants, squirrel away file
> descriptors before closing them.
ALL shells squirrel away file descriptors before closing them for the
duration of a builtin command, if there is a chance that a later shell
command will be executed that no longer needs the temporary closure.
It's just that ksh is a bit smarter about recognizing the last command
in a script, and doesn't squirrel away when there are no subsequent
commands that could possible need the fd. But as was pointed out on the
dash list, this means that ksh is buggy when there is an exit trap
installed such that there really ARE commands after the last command of
the script:
$ ksh93 -c ':; trap "echo hi" EXIT >/dev/null'
$
All other shells output hi, because the redirection to /dev/null should
only have lasted for the duration of installing the trap, and not for
the actual execution of the trap.
--
Eric Blake address@hidden +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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- [Bug-tar] tar 1.24: OpenBSD testsuite failures, Christian Weisgerber, 2010/10/26
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Paul Eggert, 2010/10/26
- Message not available
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Christian Weisgerber, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Eric Blake, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Eric Blake, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Paul Eggert, 2010/10/27
- Message not available
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Paul Eggert, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures,
Eric Blake <=
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Christian Weisgerber, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Paul Eggert, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Eric Blake, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Eric Blake, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Eric Blake, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Paul Eggert, 2010/10/27
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Eric Blake, 2010/10/28
- Message not available
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Eric Blake, 2010/10/28
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Joerg Schilling, 2010/10/28
- Re: [Bug-tar] tar 1.24: OpenBSD testsuite failures, Christian Weisgerber, 2010/10/27