#!/bin/bash
 
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
  
base_path=$1
hours=$2

last_date=$(find $base_path -mindepth 1 -maxdepth 1 -printf "%T@\n" 2>/dev/null | sort | tail -n 1)

if [ -z "$last_date" ]; then
  echo "UNKNOWN: Could not read folder"
  exit $STATE_UNKNOWN
else
  LC_ALL=C last_date=$(printf "%.*f" 0 $last_date)
  LC_ALL=C age=$(( $(date "+%s") - $last_date))
  max_age=$(( $hours * 60 * 60 ))
  min_date=$(date -d "$hours hours ago" "+%s")
  if [ "$min_date" -lt "$last_date" ]; then
    echo "OK: Last file $(date -d @$last_date) | age=${age}s;;$max_age;;"
    exit $STATE_OK
  else
    echo "CRITICAL: Last file $(date -d @$last_date) | age=${age}s;;$max_age;;"
    exit $STATE_CRITICAL
  fi
fi