Re: Coproc within coproc supported?

[Chet Ramey]

On 11/18/22 5:33 AM, Tadeus Prastowo wrote:

> > A (subshell) is an exact copy of the parent shell, so it inherits the
> > coproc. It just won't be able to write or read to the coproc, and can't
> > wait for a coproc it inherits, since the subshell is not the coproc
> > process's parent.
>
> Given that coprocs are process-based and a subshell is a new process
> despite being an exact copy of the parent process, I think logically
> it follows that it is not a bug if the subshell creates a coproc.
> Therefore, Bash back in the version 4.3.48 should have not issued the
> coproc-exists warning.

Sure, it was a spurious warning that didn't prevent the subshell from
instantiating another coproc.

--
``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/