#!/bin/bash
#
#   Copyright (C) 2013 Intel Corporation; author Matt Fleming
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
#   Boston MA 02111-1307, USA; either version 2 of the License, or
#   (at your option) any later version; incorporated herein by reference.
#

usage()
{
    echo "Usage: " $0 "[start|stop] <objdir> <outputfile> <config>" > /dev/stderr
}

if [ $# -lt 4 ]; then
    usage
    exit 1
fi

if [ `id -u` -ne 0 ]; then
    echo $0 "must be invoked as root" > /dev/stderr
    exit 1
fi

start_func()
{
    dd if=/dev/zero of=$2 bs=512 count=$(((32 * 1024 * 1024)/512)) > /dev/null 2>&1

    tmpdir=`mktemp -d || exit 1`

    next=`losetup -f`
    losetup $next $2

    mkfs.vfat $next > /dev/null 2>&1

    mount $next $tmpdir

    mkdir -p $tmpdir/boot/syslinux
    cp $3 $tmpdir/boot/syslinux/syslinux.cfg

    for f in `find $1 -name "*.c32"`; do
	cp $f $tmpdir/boot/syslinux
    done

    $1/linux/syslinux --directory /boot/syslinux --install $next > /dev/stderr
    sync

    echo $tmpdir $next
}

stop_func()
{
    umount $1
    rm -fr $1

    losetup -d $2
}

case "$1" in
    start)
	shift
	start_func $*
	;;
    stop)
	shift
	stop_func $*
	;;
esac