Question

I have a bash code like this.

while <some_condition>
do
    some_script &
done

My purpose is that to get all outputs of some_script code and assign a variable. I tried to write

out=`some_script &`

but this time some_script codes did not run at same time. What can I do?

Answer 1

You can redirect the background commands to temp files, then wait for them to finish and gather the ouput back to the variable:

while <some_condition>
do
    temp=$(mktemp)
    temps=$temps" $temp"
    some_script > $temp &
done
wait
output=$(cat $temps)
rm $temps