loop.sh [--expected EXIT_CODE] COMMANDS...

loop.sh

expected=0
command=$@
re='^[0-9]+$'
if [[ $1 == '--expected' ]] ; then
    if ! [[ $2 =~ $re ]] ; then
        echo "Error: expected exit code '$2' is invalid."
        exit 1
    else
        expected=$2
        command=${@:3}
    fi
fi
$command
ret=$?
echo "Got exit code: $ret"
while [ $ret -ne $expected ]; do
    echo "Not good! Try again!"
    sleep 1
    $command
    ret=$?
    echo "Got exit code: $ret"
done
echo "Exiting ..."