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Re: set -e works incorrectly in subshells
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From: |
Eric Blake |
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Subject: |
Re: set -e works incorrectly in subshells |
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Date: |
Wed, 23 Nov 2011 05:45:57 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110930 Thunderbird/7.0.1 |
On 11/23/2011 03:26 AM, Марк Коренберг wrote:
> Repeat-By:
> mmarkk@mmarkk-work:~$ ( set -e; echo aaa; false; echo bbb )
> aaa
> mmarkk@mmarkk-work:~$ ( set -e; echo aaa; false; echo bbb ) || true
> aaa
> bbb
> mmarkk@mmarkk-work:~$
ksh has the same behavior, and POSIX requires it (basically, running the
subshell on the left of || has a higher precedence than the explicit
'set -e' within the subshell).
http://austingroupbugs.net/view.php?id=52
Expected behavior. And one of the arguments I give why using the crutch
of 'set -e' is almost always the wrong thing in a complex script.
--
Eric Blake eblake@redhat.com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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