Re: How to deal with errors in <()?

[Eduardo A . Bustamante López]

> But I am wondering if there is a walkaround to deal with errors in
> <(). The ideal behavior should be that if there is a error in <(),
> then we should not consider commandA is executed correctly even if its
> return status is 0.
Again, address your questions to help-bash.

you can use:

CommandB | CommandA, and consult the PIPESTATUS array.

Or, you can do:

mkfifo Fifo
CommandB > Fifo & Bpid=$!
CommandA < Fifo
if wait "$Bpid"; then
 echo CommandB was successful
else
 echo CommandB failed
fi