#!/bin/sh

# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2009-2014 Stephan Raue (stephan@openelec.tv)
# Copyright (C) 2022-present Team LibreELEC (https://libreelec.tv)

. /etc/swap.conf
. /etc/profile

if [ -f /storage/.config/swap.conf ]; then
  . /storage/.config/swap.conf
fi

if [ -e /dev/.storage_netboot ] ; then
  logger -t Boot "### netbooting... swap disabled ###"
  exit 0
fi

if [ ! "${SWAP_ENABLED}" = "yes" ] ; then
  logger -t Boot "### swap disabled via configfile ###"
  exit 0
fi

SWAP=$(blkid -t TYPE="swap" -o device)

case $1 in
  create)
    if [ -z "${SWAP}" ] && [ ! -f "${SWAPFILE}" ]; then
      mkdir -p "$(dirname ${SWAPFILE})"
      dd if=/dev/zero of="${SWAPFILE}" bs=1M count="${SWAPFILESIZE}"
      chmod 0600 "${SWAPFILE}"
      mkswap "${SWAPFILE}"
    fi
    ;;
  mount)
    { [ -z "${SWAP}" ] && [ -f "${SWAPFILE}" ]; } && SWAP="${SWAPFILE}"
    for i in ${SWAP}; do
      swapon -p 10000 "${i}"
    done
    ;;
  unmount)
    swapoff -a
    ;;
esac