pi-hole/advanced/Templates/pihole-FTL.service

#!/usr/bin/env sh
### BEGIN INIT INFO
# Provides:          pihole-FTL
# Required-Start:    $remote_fs $syslog $network
# Required-Stop:     $remote_fs $syslog $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: pihole-FTL daemon
# Description:       Enable service provided by pihole-FTL daemon
### END INIT INFO

# Source utils.sh for getFTLPIDFile(), getFTLPID()
PI_HOLE_SCRIPT_DIR="/opt/pihole"
utilsfile="${PI_HOLE_SCRIPT_DIR}/utils.sh"
# shellcheck disable=SC1090
. "${utilsfile}"


is_running() {
  if [ -d "/proc/${FTL_PID}" ]; then
    return 0
  fi
  return 1
}

cleanup() {
    # Run post-stop script, which does cleanup among runtime files
    sh "${PI_HOLE_SCRIPT_DIR}/pihole-FTL-poststop.sh"
}


# Start the service
start() {
  if is_running; then
    echo "pihole-FTL is already running"
  else
    # Run pre-start script, which pre-creates all expected files with correct permissions
    sh "${PI_HOLE_SCRIPT_DIR}/pihole-FTL-prestart.sh"

    if setcap CAP_NET_BIND_SERVICE,CAP_NET_RAW,CAP_NET_ADMIN,CAP_SYS_NICE,CAP_IPC_LOCK,CAP_CHOWN+eip "/usr/bin/pihole-FTL"; then
      su -s /bin/sh -c "/usr/bin/pihole-FTL" pihole || ec=$?
    else
      echo "Warning: Starting pihole-FTL as root because setting capabilities is not supported on this system"
      /usr/bin/pihole-FTL || ec=$?
    fi
    # Cleanup if startup failed
    if [ -n "${ec}" ] && [ "${ec}" != 0 ]; then
        cleanup
        exit $ec
    fi
    echo
  fi
}

# Stop the service
stop() {
  if is_running; then
    kill "${FTL_PID}"
    for i in 1 2 3 4 5; do
      if ! is_running; then
        break
      fi

      printf "."
      sleep 1
    done
    echo

    if is_running; then
      echo "Not stopped; may still be shutting down or shutdown may have failed, killing now"
      kill -9 "${FTL_PID}"
    else
      echo "Stopped"
    fi
  else
    echo "Not running"
  fi
  cleanup
  echo
}

# Indicate the service status
status() {
  if is_running; then
    echo "[ ok ] pihole-FTL is running"
    exit 0
  else
    echo "[    ] pihole-FTL is not running"
    exit 1
  fi
}


### main logic ###

# catch sudden termination
trap 'cleanup; exit 1' INT HUP TERM ABRT

# Get FTL's PID file path
FTL_PID_FILE="$(getFTLPIDFile)"

# Get FTL's current PID
FTL_PID="$(getFTLPID "${FTL_PID_FILE}")"

case "$1" in
  stop)
        stop
        ;;
  status)
        status
        ;;
  start|restart|reload|condrestart)
        stop
        start
        ;;
  *)
        echo "Usage: $0 {start|stop|restart|reload|status}"
        exit 1
esac

exit 0