multi process program in bash

multi_process_in_bash_demo.sh

#!/bin/bash

task()
{
    echo "task process in $1"
    sleep 3
    echo "0" >& 6
}

fifo=/tmp/$.fifo
mkfifo $fifo
exec 6<>$fifo
rm $fifo

for i in `seq 0 9`; do
    {
        task $i
    } &
done

for i in `seq 0 9`; do
    read -u 6 result
    if [ $result -ne 0 ]; then
        echo "task $i failed!"
    fi
done

exec 6>&-