#!/usr/bin/env bash

# exit if a command fails
set -o errexit

# display last non-zero exit code in a failed pipeline
set -o pipefail

# make sure the correct number of arguments are passed; if not, output syntax and exit
if [ "$#" -eq 1 ]; then
  ping -O "$1" 2>&1 | while read -r PONG; do echo "$(date): ${PONG}"; done
elif [ "$#" -eq 2 ]; then
  ping -O "$1" 2>&1 | while read -r PONG; do echo "$(date): ${PONG}" | tee -a "$2".log; done
else
  echo "Usage: pinglog <address> [logfile name]"
  exit 1
fi