How to do infinite loop using do while and break if something failed? I'm trying to check the status of AWS AMI and execute some commands if the status is `available`. Below is my small script to achieve that. #!/usr/bin/env bash REGION="us-east-1" US_EAST_AMI="ami-0130c3a072f3832ff" while : do AMI_STATE=$(aws ec2 describe-images --region "$REGION" --image-ids $US_EAST_AMI | jq -r .Images[].State) [ "$AMI_STATE" == "available" ] && echo "Now the AMI is available in the $REGION region" && break sleep 10 done The above script works fine if the first call was a success. But I'm expecting something for the below scenarios * If the value of the `$AMI_STATE` is equal to `"available"`(currently working), `"failed"` it should break the loop * If the value of the `$AMI_STATE` is equal to `"pending"`, the loop should continue until it meets the expected value.

You want to run the loop while the value of `AMI_STATE` is equal to `pending`… so write just that.


while
AMI_STATE=$(aws ec2 describe-images --region "$REGION" --image-ids $US_EAST_AMI | jq -r .Images[].State) &&
[ "$AMI_STATE" = "pending" ]
do
sleep 10
done
case $AMI_STATE in
"") echo "Something went wrong: unable to retrieve AMI state";;
available) echo "Now the AMI is available in the $REGION region";;
failed) echo "The AMI has failed";;
*) echo "AMI in weird state: $AMI_STATE";;
esac