#!/bin/sh

PREREQ=""

prereqs()
{
	echo "$PREREQ"
}

case $1 in
# get pre-requisites
prereqs)
	prereqs
	exit 0
	;;
esac

if [ -z "${resume}" ] || [ ! -e /sys/power/resume ]; then
	exit 0
fi

. /scripts/functions
. /scripts/local

PAGE_SIZE=4096
if [ -x /bin/getconf ]; then
	PAGE_SIZE=$(getconf PAGESIZE)
fi
export PAGE_SIZE

if ! local_device_setup ${resume} "suspend/resume device" false; then
	log_failure_msg "Suspend/resume device setup failed"
	exit 0
fi

DEV=$(readlink ${resume})
log_success_msg "Resume device: '$resume' ($DEV)"
DEV=/sys/class/block/${DEV##*/}/dev
if [ -r "$DEV" ]; then
        read MAJMIN < "$DEV"
fi
if [ -z "$MAJMIN" ]; then
	log_failure_msg "Failed to get ${DEV} major/minor"
        exit 1
fi

if [ "${resume_offset}" -ge 0 ] 2>/dev/null; then
	offset_option=$((${resume_offset} * ${PAGE_SIZE}))
	SWAPTYPE=$(blkid -p -O ${offset_option} "${resume}" -s TYPE -o value)
	MAJMIN="${MAJMIN}:${resume_offset}"
else
	SWAPTYPE=$(blkid -p -o value -s TYPE "${resume}")
fi

case "${SWAPTYPE}" in
    swsuspend|s1suspend|s2suspend|ulsuspend|tuxonice)
	if [ -x /bin/plymouth ] && plymouth --ping; then
		plymouth message --text="Resuming from $resume"
	fi

	log_success_msg "Resuming from $resume (${MAJMIN})"
	echo "${MAJMIN}" > /sys/power/resume
	;;
esac