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Re: [Help-bash] Why BASH_SUBSHELL behaves differently in () and <()?

From: Chet Ramey
Subject: Re: [Help-bash] Why BASH_SUBSHELL behaves differently in () and <()?
Date: Fri, 18 Sep 2015 09:32:15 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.2.0

On 9/17/15 5:20 AM, ziyunfei wrote:
> Chet Ramey <address@hidden> writes:
>> 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.
> Chet, `echo $BASH_SUBSHELL &' and `: | echo $BASH_SUBSHELL' still print 0 
> in bash-4.4 alpha, is this a problem?

I'll look at the first and make sure it's handled consistently.  The
pipeline, even though it's run in a subshell environment, has never
modified the value of BASH_SUBSHELL in a visible way.  Maybe it should.

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden

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