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Re: [Help-bash] Why BASH_SUBSHELL behaves differently in () and <()?
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From: |
Chet Ramey |
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Subject: |
Re: [Help-bash] Why BASH_SUBSHELL behaves differently in () and <()? |
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Date: |
Mon, 06 Apr 2015 09:40:27 -0400 |
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User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 |
On 4/4/15 7:24 PM, Peng Yu wrote:
> Hi,
>
> The following code shows that BASH_SUBSHELL behaves differently in ()
> and <(). But my understanding is that, in both case, the echo commands
> are run in a subshell. Is it so? If so, 1 instead of 0 should be
> printed in the last command?
Yes, it's an oversight in the process substitution code. BASH_SUBSHELL
should be handled the same way it is by asynchronous commands, explicit
subshells, and command substitution. I have made the simple change and
it will be fixed in the next release of bash.
(I am back from my vacation and will be answering bug reports as I am able.)
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU address@hidden http://cnswww.cns.cwru.edu/~chet/