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Re: Process group id of first command in command substitution (bash4 vs


From: Chet Ramey
Subject: Re: Process group id of first command in command substitution (bash4 vs bash3)
Date: Mon, 20 Feb 2012 16:57:03 -0500

> I'm not sure if it's a bug or not, but there is change between old bash 
> 3.2 and bash 4.2.
> When you run a script:
> set -m
> $(sleep 1; sleep 2)
> 
> in bash 4.2 the first sleep has same group id as parent shell. However 
> in bash 3.2 it has different group id.
> 
> Is it bug or not? I'm not able to find documentation for this change. 
> And seems that POSIX says nothing about it.

How could this possibly matter?

-- 
``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/



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