accounting.nightly.example.sh

#!/bin/bash
me="$0"

#This function will alert PagerDuty that our script failed
alertonfail() {
  if [ "$1" -ne "0" ]; then
    echo "Error $1 on $me"

    curl -H "Content-type: application/json" -X POST \
        -d '{    
          "service_key": "b38b2d9753ba4b6a804e2c1cf8636b91",
          "incident_key": "Fatal error in the accounting script",
          "event_type": "trigger",
          "description": "Check the logs",
          "details": {
            "would be": "nice to have"
          }
        }' \
        "https://events.pagerduty.com/generic/2010-04-15/create_event.json"
      
      #Now that we're alerting someone, let's stop running the rest of the script
      exit $1
  fi
}

#This command succeeds and PD is not alerted:
ls > /dev/null
alertonfail $?

#This command doesn't exist, so it fails. (Hopefully your program exists)
run-the-accounting-system for important files
alertonfail $?