#!/bin/sh
#
# $Id: hack-lilo 1315 2007-04-16 14:13:59Z bruno $
#


GetDevFromLine() {
    echo "$1" | cut -d'=' -f2 | sed s/' '//
}


GetOldFstabMountpoint() {
    local res
    res=`tr -s '\t' ' ' < $old_fstab | grep "$1" | cut -d' ' -f2`
#    echo "old_fstab = $old_fstab" >> /dev/stderr
    if [ "$res" = "" ] ; then
#	echo "OK, resB" >> /dev/stderr
	res=`tr -s '\t' ' ' < $old_mountlist | grep " $1 " | cut -d' ' -f1`
    fi
    echo "$res"
}


GetNewFstabMountpoint() {
    for i in fd0 fd0u1722 fd0h1440 fd0H1440 cdrom cdrw cdrom2 ; do
	if [ "$1" = "/dev/$i" ] ; then
	    echo "/dev/$i"
	    return
	fi
    done
    old_mountpoint=`GetOldFstabMountpoint $1`
#    echo "old_mountpoint = $old_mountpoint" >> /dev/stderr
    new_mountpoint=`tr -s '\t' ' ' < $new_mountlist | grep " $old_mountpoint" | cut -d' ' -f1`
    if [ "$new_mountpoint" = "" ] ; then
	mtpt=`tr -s '\t' ' ' < $new_mountlist | grep " $old_mountpoint " | cut -d' ' -f2`
	dev=`tr -s '\t' ' ' < $new_mountlist | grep " $mtpt " | cut -d' ' -f1`
#	echo "NEW_MP (A) = $dev" >> /dev/stderr
#    else
#	echo "NEW_MP (B) = $new_mountpoint" >> /dev/stderr
    fi
}



ProcessBigHack() {
    local incoming dev newdev col2 col1_new
    incoming="$1"
#    echo "incoming = $1" >> /dev/stderr
    dev=`GetDevFromLine "$incoming"`
#    GetOldFstabMountpoint $dev
    newdev=`GetNewFstabMountpoint $dev`
    if [ ! "$newdev" ] ; then
	col2=`grep "$dev " $old_mountlist | cut -d' ' -f2`
	col1_new=`grep " $col2 " $new_mountlist | cut -d' ' -f1`
	newdev="$col1_new"
	if [ ! "$newdev" ] ; then
	    newdev=$dev
	fi
    fi
#    old_fstab_line=`grep "$dev" $new_fstab`
    [ "$2" = "other" ] || echo -e -n "\t"
    echo -e "$2=$newdev"
    echo "$newdev" >> $bootlistfile
}

ProcessOther() {
    ProcessBigHack "$1" "other"
}


ProcessRoot() {
    ProcessBigHack "$1" "root"
}



ProcessLilo() {
    local incoming bonks blanklines
    read incoming
    bonks=0
    blanklines=0
    while [ "$blanklines" -lt "5" ] ; do
	if [ "$incoming" = "" ] ; then
	    blanklines=$(($blanklines+1))
            read incoming
            continue
        fi
        blanklines=0
        if [ "`echo "$incoming" | grep "#"`" != "" ] ; then
            echo "$incoming"
	elif [ "`echo "$incoming" | grep "other.*="`" != "" ] ; then
	    ProcessOther "$incoming"
	    bonks=$(($bonks+1))
	elif [ "`echo "$incoming" | grep "root.*="`" != "" ] ; then
	    ProcessRoot "$incoming"
	    bonks=$(($bonks+1))
	elif [ "`echo "$incoming" | grep "image.*="`" != "" ] ; then
	    bonks=$(($bonks+1))
	    echo "$incoming"
	else
	    if [ "$bonks" -gt "0" ] && [ "`echo "$incoming" | grep "image"`" = "" ]  ; then
		echo -e -n "\t"
	    fi
	    echo "$incoming"
	fi
	read incoming
    done
}


# ------------------ main ------------------

LogIt "hack-lilo --- starting"

bootlistfile=/tmp/partitions-to-make-bootable.txt
> $bootlistfile

if [ "$#" -ne "6" ] ; then
    LogIt "hack-lilo <old mountlist> <old fstab> <old lilo> <new mountlist> <new fstab> <new lilo>" 1
    LogIt "NB: the new lilo file is outgoing; all others are incoming." 1
    exit 1
fi

old_mountlist=$1
old_fstab=$2
old_lilo=$3
new_mountlist=$4
new_fstab=$5
outfile=$6

> $outfile
ProcessLilo < $old_lilo >> $outfile
chmod 600 $outfile
sort -u $bootlistfile -o $bootlistfile

#------ disabled 12/10/01 (doesn't do anything anyway *g*)
#make-me-bootable $bootlistfile > /tmp/make-me-bootable.log 2> /tmp/make-me-bootable.log

LogIt "hack-lilo --- leaving"
exit 0