Run several commands in bash, in parallel. Let all complete regardless of return code. Return 1 if any fail.

parallel-execution.sh

#!/bin/bash

set -o errexit
set -o pipefail

pids=""
RESULT=0

(sleep 1; echo 'a'; exit 1) &
pids="$pids $!"

(sleep 2; echo 'b'; exit 0) &
pids="$pids $!"

(sleep 3; echo 'c'; exit 0) &
pids="$pids $!"


for pid in $pids; do
    wait $pid || let "RESULT=1"
done

echo "done"

if [ "$RESULT" == "1" ];
    then
       exit 1
fi

exit 0

Goals...

• be able to run with errexit option
• be able to run a set of commands where some may fail
• run them all in parallel
• run them all to completion even if one fails first
• exit the entire script with a non-zero exit code if any fail