[Help-bash] How to `wait` for all the background processes but capture their non zero exit status?

[Peng Yu]

Hi,

`help wait` says "If ID is not given, waits for all currently active
child processes, and the return status is zero."

Sometimes, it would be convenient to know whether any of these
processes have a non zero exit status. What is the best way to capture
such information? Thanks.

-- 
Regards,
Peng