Re: ‘command … &’ creates subshell

[Chet Ramey]

On 6/29/20 4:33 PM, Dmitry Alexandrov wrote:
> Dear maintainer,
> 
> I believe, that the current behaviour of GNU Bash:
> 
>       $ command cat &
>       [1] 3831
>       $ ps --pid $! --ppid $!
>         PID TTY          TIME CMD
>        3831 pts/3    00:00:00 bash
>        3832 pts/3    00:00:00 cat
> 
> is problematic.  Namely it is:
> 
> 1) unexpected, as (a) it does not seem to be documented, (b) itʼs 
> counter-intuitive and (c) other bourne-like shells (busybox ash, dash, ksh93, 
> mksh, zsh) does not do that;

It's an opportunity for optimization, not a bug, since the results are
correct.


-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/