#!/bin/bash
unalias -a
set +xv

VERBOSE=0

ARCHP=xxARCHPxx
ARCHM=xxARCHMxx
LOCALVERSION=xxLOCALVERSIONxx
LOCVER=xxLOCVERxx
KERNELRELEASE=xxKERNELRELEASExx
FIMAGE=xxFIMAGExx
FCONFIG=xxFCONFIGxx
FSYSTEMMAP=xxFSYSTEMMAPxx
FVMLINUX=xxFVMLINUXxx

x=${KERNELRELEASE#*elbrus.}
x=${LOCVER}
LABEL=k${x}

OSLBASE=base
OSLUP=$LABEL
OSLFLASH=oslflash

[[ -z $ROOT ]] && ROOT=/
ROOTDIR=$ROOT

BOOTCONF=${ROOTDIR}/boot/boot.conf
if [[ $ARCHM == e2k ]]; then
	BOOTIMAGE=boot/$FIMAGE
else
	BOOTIMAGE=$FIMAGE
fi

tmpf=/tmp/__prerm_linux_$$_
################################################################################
cleanup()
{
	rm -f ${tmpf}*
}
DoEcho()
{
	echo "=== linux prerm: $LOCVER: $*"
}
DoEchoV()
{
	[[ $VERBOSE == 0 ]] && return 0
	DoEcho "$*"
}
################################################################################
# check boot.conf: label=base - image=/FIMAGE
################################################################################
CheckLabel_base()
{
O_IFS="$IFS"
export IFS=
	isbase=0
	while read -r line; do
		line1=$(echo $line | sed -e 's/[\t ]*//g')
		if [[ $line1 == "label=${OSLBASE}" || $line1 == "label=${OSLBASE}#"* ]]; then
			isbase=1
			continue
		fi
		if [[ $isbase == 1 ]]; then
			if [[ $line1 == "image="* ]]; then
				fimage=${line1#image=/}
				fimage=${fimage%%\#*}
				if [[ $fimage == $FIMAGE ]]; then
					return 1
				else
					return 0
				fi
			fi
		fi
	done <${BOOTCONF}
IFS="$O_IFS"
}
################################################################################
trap "cleanup" 1 2 3 6 15 EXIT

DoEchoV "KERNELRELEASE=$KERNELRELEASE"
DoEchoV "FIMAGE=$FIMAGE"
DoEchoV "LABEL=$LABEL"

krelease=`uname -r`
if [[ "$krelease" == "$KERNELRELEASE" ]]; then
	DoEcho "WARNING: kernel release: uname -r: $krelease"
	DoEcho "WARNING: cannot remove package"
	exit 1
fi

if [[ -f $BOOTCONF ]]; then
	CheckLabel_base
	if [[ $? == 1 ]]; then
		DoEcho "WARNING: label=${OSLBASE}: image=/$FIMAGE"
		DoEcho "WARNING: cannot remove package"
		exit 1
	fi
fi
exit 0