How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess ends with code !=0?

Question

How to wait in a bash script for several subprocesses spawned from that script to finish and return exit code !=0 when any of the subprocesses ends with code !=0 ?

S

Answer 1

trap is your friend. You can trap on ERR in a lot of systems. You can trap EXIT, or on DEBUG to perform a piece of code after every command.

This in addition to all the standard signals.