Stop a loop process in shell scripting after some time

Question

I have a script that looks like this, this script is checking whether my pods is in Running state or Not by redefining x on every loop.

x=$(/opt/oc get pods --selector app=${bamboo.shortPlanName} -o jsonpath='{range .items[]}{.status.phase}{"\n"}{end}')

until [ "$x" == "Running" ];
do
   sleep 5
   x=$(/opt/oc get pods --selector app=${bamboo.shortPlanName} -o jsonpath='{range .items[]}{.status.phase}{"\n"}{end}')
   echo $x
done

But, I want to modify my current script to also support timeout, I mean after 60 second of looping, then it should be stop, or after 12 times of looping, then it should be stop. Any idea how to do that?

Answer 1

bash provides a special variable SECONDS that can be used as a rough timer.

SECONDS=0
while (( SECONDS < 60)); do
    x=$(/opt/oc get pods --selector app=${bamboo.shortPlanName} -o jsonpath='{range .items[]}{.status.phase}{"\n"}{end}')
    if [[ $x == Running ]]; then
        break
    fi
    sleep 5
done

The expansion of SECONDS gives you not the assigned value, but the difference between the numbers of seconds since the assignment and the assigned value. The effect is like a variable whose value is incremented by 1 each second.