#!/bin/bash

# Source the mail configuration.
source /etc/mail.conf "mail-queue" 2>/dev/null || {
  printf "%s: %s\\n" "${0##*/}" "Failed to source /etc/mail.conf" >&2
  exit 1
}

# Don't do anything unless 'mailq' is installed.
hash mailq 2>/dev/null && {
  # Prevent a race with other cron jobs that produce emails.
  sleep $(( RANDOM % 180 ))

  # Get the queue
  TMP_OUTPUT="$(mailq)"

  [[ -z "$TMP_OUTPUT" ]] && exit 0

  # Send the message.
  if [[ -n "${EMAIL_TO[*]}" ]]; then
    mailx "${MAILX_ARGS[@]}" -S "from=$EMAIL_FROM" -s "Mail queue" "${EMAIL_TO[@]}" <<<"$TMP_OUTPUT" 2>/dev/null || {
      printf "%s: %s\\n" "${0##*/}" "mailx command failed" >&2
      exit 1
    }
  else
    printf "%s: %s\\n" "${0##*/}" "no recipient configured for mail delivery" >&2
    exit 1
  fi
}

exit 0