Bash isn't made for parallel processing such as this. To accomplish what you want, I had to write a function library. I'd suggest seeking a language more readily suited to this if possible.
The problem with looping through the pids, such as this...
#!/bin/bash
pids=()
f() {
sleep $1
echo "no good"
false
}
t() {
sleep $1
echo "good"
true
}
t 3 &
pids+=$!
f 1 &
pids+=$!
t 2 &
pids+=$!
for p in ${pids[@]}; do
wait $p || echo failed
done
The problem is that "wait" will wait on the first pid, and if the other pids finish before the first one does, you'll not catch the exit code. The code above shows this problem on bash v4.2.46. The false command should produce output that never gets caught.
