#!/bin/sh
## @file
# Obsolete?
#

#
# Copyright (C) 2006-2023 Oracle and/or its affiliates.
#
# This file is part of VirtualBox base platform packages, as
# available from https://www.virtualbox.org.
#
# 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, in version 3 of the
# License.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <https://www.gnu.org/licenses>.
#
# SPDX-License-Identifier: GPL-3.0-only
#

if [ "x$3" == "x" ]; then

    echo "syntax error"
    echo "syntax: $0 imagename <size-in-KBs> <init prog> [tar files]"
    echo ""
    echo "Simples qemu boot image is archived by only specifying an statically"
    echo "linked init program and using the dev.tar.gz file to create devices."
    echo "The boot linux in qemu specifying the image as -hda. Use the -kernel"
    echo "option to specify a bzImage kernel image to use, and specify"
    echo "-append root=/dev/hda so the kernel will mount /dev/hda and look"
    echo "for /sbin/init there."
    echo ""
    echo "Example:"
    echo "  sh ./mkdsk.sh foo.img 2048 ~/VBox/Tree/out/linux/debug/bin/tstProg1 dev.tar.gz"
    echo "  qemu -hda foo.img -m 32  -kernel ~/qemutest/linux-test/bzImage-2.4.21 -append root=/dev/hda"
    exit 1
fi

image=$1
size=$2
init=$3

sizebytes=`expr $size '*' 1024`
cyls=`expr 8225280 / $sizebytes`
echo $cyls

echo "* Creating $image of $size kb...."
rm -f $image
dd if=/dev/zero of=$image count=$size bs=1024 || exit 1

echo "* Formatting with ext2..."
/sbin/mkfs.ext2 $image || exit 1

echo "* Mounting temporarily at ./tmpmnt..."
mkdir -p tmpmnt
sudo mount $image ./tmpmnt -t ext2 -o loop=/dev/loop7 || exit 1

# init
echo "* Copying $init to sbin/init..."
mkdir tmpmnt/sbin
sudo cp $init tmpmnt/sbin/init
sudo chmod 755 tmpmnt/sbin/init

shift
shift
shift
while [ "x$1" != "x" ];
do
    echo "* Untarring $1 to disk..."
    sudo tar -xzv -C tmpmnt -f $1
    shift
done

echo "* Unmounting    tmpmnt..."
sudo umount tmpmnt
rmdir tmpmnt
echo "* Done! (Perhaps even successfully so...)"
echo "  'root=/dev/hda' remember :-)"
exit 0