source: MondoRescue/trunk/mondo/mondo/restore-scripts/mondo/hack-lilo@ 1

#!/bin/sh


LogIt() {
    echo "$1" >> /tmp/mondo-restore.log
}



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


GetOldFstabMountpoint() {
    local res
    res=`cat $old_fstab | tr -s '\t' ' ' | grep "$1" | cut -d' ' -f2`
#    echo "old_fstab = $old_fstab" >> /dev/stderr
    if [ "$res" = "" ] ; then
#   echo "OK, resB" >> /dev/stderr
    res=`cat $old_mountlist | tr -s '\t' ' ' | 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=`cat $new_mountlist | tr -s '\t' ' ' | grep " $old_mountpoint" | cut -d' ' -f1`
    if [ "$new_mountpoint" = "" ] ; then
    mtpt=`cat $new_mountlist | tr -s '\t' ' ' | grep " $old_mountpoint " | cut -d' ' -f2`
    dev=`cat $new_mountlist | tr -s '\t' ' ' | 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=`cat $old_mountlist | grep "$dev " | cut -d' ' -f2`
    col1_new=`cat $new_mountlist | grep " $col2 " | cut -d' ' -f1`
    newdev="$col1_new"
    if [ ! "$newdev" ] ; then
        newdev=$dev
    fi
    fi
#    old_fstab_line=`cat $new_fstab | grep "$dev"`
    [ "$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
cat $bootlistfile | sort | uniq > $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