#!/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

is_running() {
  pgrep -xo "pihole-FTL" > /dev/null
}


# Start the service
start() {
  if is_running; then
    echo "pihole-FTL is already running"
  else
    # Touch files to ensure they exist (create if non-existing, preserve if existing)
    mkdir -pm 0755 /run/pihole
    [ ! -f /run/pihole-FTL.pid ] && install -m 644 -o pihole -g pihole dev/null /run/pihole-FTL.pid
    [ ! -f /run/pihole-FTL.port ] && install -m 644 -o pihole -g pihole dev/null /run/pihole-FTL.port
    [ ! -f /var/log/pihole-FTL.log ] && install -m 644 -o pihole -g pihole dev/null /var/log/pihole.log
    [ ! -f /var/log/pihole.log ] && install -m 644 -o pihole -g pihole dev/null /var/log/pihole.log
    [ ! -f /etc/pihole/dhcp.leases ] && install -m 644 -o pihole -g pihole dev/null /etc/pihole/dhcp.leases
    # Ensure that permissions are set so that pihole-FTL can edit all necessary files
    chown pihole:pihole /run/pihole /etc/pihole /var/log/pihole.log /var/log/pihole.log /etc/pihole/dhcp.leases
    # Ensure that permissions are set so that pihole-FTL can edit the files. We ignore errors as the file may not (yet) exist
    chmod -f 0644 /etc/pihole/macvendor.db /etc/pihole/dhcp.leases /var/log/pihole-FTL.log /var/log/pihole.log
    # Chown database files to the user FTL runs as. We ignore errors as the files may not (yet) exist
    chown -f pihole:pihole /etc/pihole/pihole-FTL.db /etc/pihole/gravity.db /etc/pihole/macvendor.db
    # Chown database file permissions so that the pihole group (web interface) can edit the file. We ignore errors as the files may not (yet) exist
    chmod -f 0664 /etc/pihole/pihole-FTL.db
    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
    else
      echo "Warning: Starting pihole-FTL as root because setting capabilities is not supported on this system"
      /usr/bin/pihole-FTL
    fi
    echo
  fi
}

# Stop the service
stop() {
  if is_running; then
    pkill -xo "pihole-FTL"
    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"
      pkill -xo -9 "pihole-FTL"
      exit 1
    else
      echo "Stopped"
    fi
  else
    echo "Not running"
  fi
  # Cleanup
  rm -f /run/pihole/FTL.sock /dev/shm/FTL-*
  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 ###
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