Repeat iteration of bash for-cycle

bash_loop_v1.sh

#!/bin/bash

DATA=(10 20 30 40 50 60 70 80 90 100)
DATA_LEN=$[  ${#DATA[*]} - 1 ]
TIME_OUT=22

execution=0 # Count total number of cycles
result=1 # initialized as failed
start_time=$(date +%s)

function dummy_task() {
    # Just sleep and return random results
    sleep 1.5
    return $[RANDOM%2] # 0 OK, 1 fail
}

for i in $(seq 0 $DATA_LEN)
do
    while [ $result -ne 0 ] ; do
        # Time out check
        current_time=$(date +%s)
        if [ $TIME_OUT -le $[current_time - start_time] ] ;
        then
            printf "Process took more than %d secs, exiting...\n" $TIME_OUT
            exit 1
        fi

        : $[execution++]

        # Main task
        dummy_task
        result=$?

        printf "Loop $i Item ${DATA[i]} : $result (exec $execution)"
        if [ $result -eq 0 ] ; then
            printf " OK\n"
            result=1
            break
        else
            printf " FAIL, restarting\n"
            continue
        fi
    done
done

printf "It took $execution cycles to finish processing.\n"

bash_loop_v2.sh

#!/bin/bash

DATA=(10 20 30 40 50 60 70 80 90 100)
DATA_LEN=$[  ${#DATA[*]} - 1 ]
TIME_OUT=22

execution=0 # Count total number of cycles
result=1 # initialized as failed

function wait_kill() {
    local ppid=$1
    local time_out=$2

    sleep $time_out
    kill -s TERM $ppid
    printf "Process took more than %d secs, exiting...\n" $TIME_OUT

    exit
}

function dummy_task() {
    # Just sleep and return random results
    sleep 1.0
    return $[RANDOM%2] # 0 OK, 1 fail
}

wait_kill $$ $TIME_OUT &
wait_pid=$!

for i in $(seq 0 $DATA_LEN)
do
    while [ $result -ne 0 ] ; do
        : $[execution++]

        # Main task
        dummy_task
        result=$?

        printf "Loop $i Item ${DATA[i]} : $result (exec $execution)"
        if [ $result -eq 0 ] ; then
            printf " OK\n"
            result=1
            break
        else
            printf " FAIL, restarting\n"
            continue
        fi
    done
done

kill -s TERM $wait_pid
printf "It took $execution cycles to finish processing.\n"