Bash - retry command N times

retry.sh

#!/bin/bash
set -euo pipefail

function myFunction() {
	myCommand
	return $?
}

retry=0
maxRetries=5
retryInterval=15
until [ ${retry} -ge ${maxRetries} ]
do
	myFunction && break
	retry=$[${retry}+1]
	echo "Retrying [${retry}/${maxRetries}] in ${retryInterval}(s) "
	sleep ${retryInterval}
done

if [ ${retry} -ge ${maxRetries} ]; then
  echo "Failed after ${maxRetries} attempts!"
  exit 1
fi

thank you ! that's exactly what I need. I wasn't sure how to do it without removing set -e

You're welcome!

Thanks ...
What is the purpose of set -euo pipefail ?

@marcoczen inspired by http://redsymbol.net/articles/unofficial-bash-strict-mode/

this solved my problem too but how do we modify the retry logic to check for specific strings in the command output and then retry instead of just checking the exit code of the command.

Sorry @BD8806 I didnt see this last question - did you sort it out in the end?

for i in {1..5}; do myFunction && break || sleep 15; done

for i in {1..5}; do myFunction && break || sleep 15; done

Perfect, thanks!