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

if [ -z "$as_user" ]; then
  last_date=$($run_command 2>/dev/null | sort | tail -n 1)
else
  last_date=$(sudo -u "$as_user" $run_command 2>/dev/null | sort | tail -n 1)
fi

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