#!/bin/bash
set -u

STATUS_OUT="$(systemctl status --full "$1" 2>/dev/null | head -n 30)"
if [ -z "$STATUS_OUT" ]; then
  STATUS_OUT="(no matching systemd unit found for: $1)"
fi

/usr/bin/sendmail -t <<ERRMAIL
To: {{ users.administrator.email }}
From: systemd <{{ users['no-reply'].email }}>
Subject: $1
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset=UTF-8

A problem with the service $1 occurred:

$STATUS_OUT

ERRMAIL