Re: [Feature Request] do comsub with builtins/functions in current env

[Chet Ramey]

On 10/9/22 12:46 PM, Akbarkhon Variskhanov wrote:
> I'd really like to see Bash not create a subshell for command
> substitutions involving built-ins and functions.

This has come up before, and the consensus to this point is that the
ksh93 syntax is worth adopting. I haven't looked closely at implementing
it yet.

> Consider this situation:
> > maxfd=$(ulimit -n)
> or this:
> > default_umask=$(umask)
> Bash forks a new process just for those two. That doesn't really make
> sense to me. Create another process, exec() another instance of bash

That's not how it works. The fork, yes, but the forked child just runs the
command.

--
``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/