waits for a successful ping, then notifies over discord

waitforping_notify_discord.sh

#!/bin/bash

DEFAULT_IP="1.1.1.1"

# Assign the first argument to IP, or use DEFAULT_IP if $1 is empty or unset
IP="${1:-$DEFAULT_IP}"

# loops until success, a single ping at a time, one a second
while [ "$RETURNCODE" != "0" ]; do
  ping -c 1 $IP &> /dev/null
  RETURNCODE=$? # ;  echo $?
  sleep 1
done

# notify over discord, with a custom message
# uses https://github.com/NoireNetworks/notify_discord
notify_discord.sh "Host $IP is up"