Bash script that will block until internet access is available and return appropriate exit value

blocking_ping.sh

#!/bin/bash
# Blocks until there is internet access
# Accepts optional parameters: host and retry limit
# Return non-zero if we try to exceed the retry limit
# Return zero if we have internet within the retry limit
# Usage: /pingblock.sh google.com 30

host=${1:-8.8.8.8}
max_tries=${2:-15}
num=0

until ping -i2 -c1 $host > /dev/null; do
  sleep 1
  echo "Checking for internet access... ($(($num + 1))/$max_tries)"
  num=$(($num + 1))
  if [[ $num -eq $max_tries ]]; then
    echo "There is no internet access!"
    exit 1
  fi
done

echo "There is internet access!"
exit 0