#!/bin/sh
. /usr/share/os-prober/common.sh
set -e

partition="$1"
bootpart="$2"
mpoint="$3"
type="$4"

found_item=0

title=""
rootdev=""
kernel=""
parameters=""
initrd=""
read_only=""
added_parameters=0
default_rootdev=""
default_kernel=""
default_parameters=""
default_initrd=""
default_read_only=""

dequote () {
item="${1%\"}"
echo "${item#\"}"
}

addparams () {
# Any parameters we find replace the default parameters, but
# otherwise append.
if [ "$added_parameters" = 0 ]; then
parameters="$1"
added_parameters=1
else
parameters="${parameters:+$parameters }$1"
fi
}

recordstanza () {
if [ -n "$kernel" ] && [ -n "$title" ]; then
if [ -e "$mpoint/$kernel" ] && [ -e "$mpoint/$initrd" ]; then
if [ "$read_only" ]; then
parameters="ro $parameters"
fi
if [ "$rootdev" ]; then
parameters="root=$rootdev $parameters"
fi
parameters="${parameters% }"
result "$rootpart:$bootpart:$title:$kernel:$initrd:$parameters"
found_item=1
else
debug "cannot find $kernel or $initrd, not recording"
fi
title=""
rootdev="$default_rootdev"
kernel="$default_kernel"
parameters="$default_parameters"
initrd="$default_initrd"
read_only="$default_read_only"
added_parameters=0
else
# Everything before set default values.
default_rootdev="$rootdev"
default_kernel="$kernel"
default_parameters="$parameters"
default_initrd="$initrd"
default_read_only="$read_only"
fi
}

parse_lilo_conf () {
mpoint="$1"
rootpart="$2"
bootpart="$3"
IFS=" ="
while read line; do
debug "parsing: $line"
set -f
set -- $line
set +f
case "$1" in
root)
rootdev=$(dequote "$2")
;;
image)
recordstanza
# Dereference if symbolic link
kernel="$(readlink -f "$(dequote "$2")")"
;;
append)
addparams "$(dequote "${line#append=}")"
;;
initrd)
# Dereference if symbolic link
initrd="$(readlink -f "$(dequote "$2")")"
;;
label)
shift 1
title="$(dequote "$*" | sed -e 's/:/ /g')"
;;
other)
recordstanza
;;
read-only)
read_only=1
;;
vga)
addparams "$line"
;;
esac
done
recordstanza
}

if [ -e "$mpoint/etc/lilo.conf" ]; then
debug "parsing lilo.conf"
parse_lilo_conf "$mpoint" "$partition" "$bootpart" < "$mpoint/etc/lilo.conf"
fi

if [ "$found_item" = 0 ]; then
exit 1
else
exit 0
fi