Wait Until a Condition Is Met in Bash Script
Until [ $(Aws Ssm Get-Automation-Execution --Automation-Execution-Id "$Id" --Query 'Automationexecution. Automationexecutionstatus' --Output Text) =...
until [ $(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text) = *"InProgress"* ];
do
echo "Automation is running......"
sleep 1m
done
status=$(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text)
if [ "$status" == "Success" ]; then
echo "Automation $status"
elif [ "$status" == "Failed" -o "$status" == "Cancelled" -o "$status" == "Timed Out" ]; then
echo "Automation $status"
fi
here the loop is never exiting, it keeps printing "Automation is running......" even after automation has been executed and status is not inprogress what i want to do is wait until status is " inprogress", print "Automation is running......" on screen. once its finished, i want to print the status of automation on screen if it failed or succeeded.
2 Answers
adding an if else until helped me get out of the loop.
until [ $(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text) = *"InProgress"* ];
do
echo "Automation is running......"
sleep 10s
if [ $(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text) != "InProgress" ]; then
echo "Automation Finished"
status=$(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text)
echo "Automation $status"
if [$status != "Success"]; then
exit 3
echo "Automation $status"
fi
break
fi
done
This is a general function which I use:
function wait_for() {
timeout=$1
shift 1
until [ $timeout -le 0 ] || ("$@" &> /dev/null); do
echo waiting for "$@"
sleep 1
timeout=$(( timeout - 1 ))
done
if [ $timeout -le 0 ]; then
return 1
fi
}
You can have another function which checks the condition:
function is_still_running() {
aws_status=$(aws ssm get-automation-execution --automation-execution-id "$id" --query 'AutomationExecution.AutomationExecutionStatus' --output text)
if [ "${aws_status}" = *"InProgress"* ]; then
return 0;
else
return 1;
fi
}
then the usage would be:
wait_for 100 is_still_running
Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.
