#!/bin/sh
# MaKe a Bootable IMAGE --- 1.44, 2.88 and El Torito no-emulation mode
# C) 2001,2002,2003 Thierry Laronde <tlaronde@polynum.org>
# C) 2001,2002,2003 Robert Millan <robertmh@gnu.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; either version 2, or (at your option)
# any later version.
#
# 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, you can either send email to this
# program's maintainer or write to: The Free Software Foundation,
# Inc.; 59 Temple Place, Suite 330; Boston, MA 02111-1307, USA.
# $Id: mkbimage,v 1.19 2004/07/21 14:43:04 robertmh Exp $
# Global variables
tarfile=
dir=
fs= #file system type
decompress=
image_type=
uname=`uname -s`
PATH=/sbin:$PATH
# You can set GRUB_PATH if you need to use a specially located GRUB.
# This MUST end by a '/'!
#----------------------------DON'T CHANGE: INTERNALS
block_size=512
cylinders=
heads=
sectors=
cyl_size=
type_option=
geo_option=
image=
bk_120=$((2 * 15 * 80))
bk_144=$((2 * 18 * 80))
bk_288=$((2 * 36 * 80))
bk_160=$((2 * 20 * 80))
bk_168=$((2 * 21 * 80))
bk_174=$((2 * 21 * 83))
lo_options=
device_map=
mkfs_options=
debug=
stage2_os_name=
# Name by which this script was invoked.
program=`echo "$0" | sed -e 's/[^\/]*\///g'`
version_number='$Revision: 1.19 $'
usage="
Usage: $program [-hVF] [-t TYPE] [-d DIRECTORY] [-s FS_TYPE] -f TAR_FILE
Make a Bootable IMAGE using GRUB as a bootloader
Options:
Actions:
-d DIRECTORY [default CWD]
Directory where the boot.image and the partition subdirectories
are/will be created
-f TAR_FILE
Name of the tar file containing the filesystem to install. Can
be a pure tar file [.tar] or a compressed tar file
[.tar.gz|.tar.bz2]
-s FS_TYPE
Type of the file system to create on the virtual disk. Choices
are:
ext2 on GNU [default is ext2]
ext2, minix or msdos on GNU/Linux [default is ext2]
-t TYPE
Type of the image to create. Choices are '1.20', '1.44', '1.60',
'1.68', '1.74', '2.88' or 'hd' [default is hd]
-F
Force to set the set_dpt flag (unnecessary 99% of the time! Be
careful!
Informations:
-D
turn Debugging on [xtrace]
-h|--help
display this Help and exit
-V|--version
display Version information and exit
Copyright (c) 2001,2002,2003 Thierry Laronde <tlaronde@polynum.org>.
Copyright (c) 2001,2002 Robert Millan <zeratul2@wanadoo.es>.
GPLed."
version="mkbimage $version_number
Written by Thierry Laronde and Robert Millan.
Copyright (c) 2001,2002,2003 Thierry Laronde <tlaronde@polynum.org>.
Copyright (c) 2001,2002,2003 Robert Millan <zeratul2@wanadoo.es>.
This is free software under the GPL version 2 or later; see the source for
copying conditions. There is NO warranty, not even for MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE."
# Functions
error ()
{
case $1 in
bug) echo "This is a bug!";
echo "$usage";;
option) echo "Unknow option"; echo "$usage";;
missing_argument) echo "You must give an argument to the option!";
echo "$usage";;
missing_option) echo "You must indicate at least one option!";
echo "$usage";;
must_be_root) echo "You must be root! (or install e2tools/mtools)";;
unknown_fs) if [ $uname = Linux ];
then echo "The GNU/Linux supported fs are: ext2, minix or msdos!";
elif [ $uname = GNU ];
then echo "The GNU supported fs is ext2!";
fi;;
unknown_format) echo "The tar file must be .tar|.tar.gz|.tar.bz2!";;
wont_fit) echo "The files won't fit on the selected type of media!";;
wrong_directory) echo "Directory inexistant or not given!";
echo "$usage";;
wrong_file) echo "File inexistant or empty!";
echo "$usage";;
wrong_type) echo "The type specified is not a valid one!";
echo "$usage";;
esac
exit 1
}
# create a filesystem of type $fs in $image with offset $offset
mkbimage_mkfs ()
{
case $offset in
0) lo_options="";;
*) lo_options="-o $offset";;
esac
if [ "$offset" = "0" ] ; then
mkfs.$fs -F $image
elif [ `id -u` = "0" ] ; then
losetup $lo_options /dev/loop1 $image
mkfs.$fs /dev/loop1
losetup -d /dev/loop1
else
error must_be_root
fi
}
# copy ${image}1/* to ${image}:/, assuming ${image} contains a filesystem
# of type $fs in offset $offset
mkbimage_cp ()
{
case $offset in
0) lo_options="";;
*) lo_options="-o $offset";;
esac
case $fs in
ext2)
cp="e2cp";
mkdir="e2mkdir";;
vfat)
cp="mcopy";
mkdir="mmd";;
*)
cp="";
mkdir="";;
esac
if [ "$offset" = 0 ] && which $cp > /dev/null ; then
for dir in $(cd ${image}1 && find -type d) ; do
$mkdir ${image}:$dir
done
for file in $(cd ${image}1 && find -type f) ; do
$cp ${image}1/$file ${image}:$file
done
elif [ "`id -u`" = "0" ] ; then
losetup $lo_options /dev/loop1 $image
mkdir ${image}.mnt
mount -t $fs /dev/loop1 ${image}.mnt
cp -a ${image}1/* ${image}.mnt/ && sync
umount ${image}.mnt
rmdir ${image}.mnt
losetup -d /dev/loop1
else
error must_be_root
fi
}
#**********************************************************************
# MAIN PROGRAM *
#**********************************************************************
#---------------------- Getting the options
[ $# -eq 0 ] && error missing_option;
while [ $# -gt 0 ]; do
case "$1" in
-d) shift;
dir="$1";
[ ! -d "$1" ] && error wrong_directory;;
-f) shift;
tarfile="$1";
[ -z "$tarfile" ] && error missing_argument;;
-s) shift;
fs="$1";;
-t) shift;
image_type="$1";;
-F) geo_option="-F";;
-D) debug="-v";
set -x;;
-h|--help) echo "$usage"; exit 0;;
-V|--version) echo "$version"; exit 0;;
*) error option ;;
esac
shift
done
#---------------------- Sanity checks
[ ! "$tarfile" ] && error missing_argument;
[ ! -s "$tarfile" ] && error wrong_file;
if [ ! "$image_type" ]; then
image_type=hd;
elif [ "$image_type" != "1.20" ] && [ "$image_type" != "1.44" ] \
&& [ "$image_type" != "1.60" ] && [ "$image_type" != "1.68" ] \
&& [ "$image_type" != "2.88" ] && [ "$image_type" != "1.74" ] \
&& [ "$image_type" != "hd" ] && [ "$image_type" != "1.60" ] ; then
error wrong_type ;
fi
[ ! "$fs" ] && fs=ext2
# Carlo Contavalli reported that I [TL] have forgotten to specify the
# partition ID for sfdisk to correctly fill the partition table (ext2 is the
# default on Linux, so this worked in this case...). This is fixed below.
case "$fs" in
ext2) mkfs_options="-m 0";
part_id="83";; # This is the default
# ufs) if [ $uname = Linux ];
# then error unknown_fs;
# fi;;
minix) if [ $uname = GNU ];
then error unknown_fs;
else
mkfs_options="-v"; # Minix version 2
part_id="81";
fi;;
msdos) if [ $uname = GNU ];
then error unknown_fs;
else
mkfs_options="-f 1 -F 12"; # the smallest...
part_id="1";
fi;;
*) error unknown_fs;;
esac
# What type of tar file has been given ?
suffix=`echo "$tarfile" | sed -n 's/^.*\.\([targbz2]\{2,3\}\)$/\1/p'`
case "$suffix" in
tar) decompress="cat";;
gz) decompress="gunzip -c";;
bz2) decompress="bunzip2 -c";;
*) error unknown_format;;
esac
#---------------------- Initializations
[ ! "$dir" ] && dir=`pwd`
image=$dir/$image_type.image
device_map=$dir/device.map
# First, find the size of the tar file in block_size.
file_size=`$decompress $tarfile | wc -c | tr -d ' '`
file_size=$(($file_size / $block_size + 1))
# Increase in order to be sure that with a fs there will be enough
# room (trying 110%)
file_size=$(($file_size + $file_size / 10))
case "$image_type" in
hd) heads=16;
sectors=63;
cyl_size=$((16 * 63));
# Create the minimum number of cylinders. At the moment, we leave
# some space by rounding everything up by adding 1 cylinder, plus
# another one for MBR + reserved track.
cylinders=$(($file_size / $cyl_size + 2));;
1.20) [ $file_size -ge $bk_120 ] && error wont_fit;
heads=2;
sectors=15;
cyl_size=$((2 * 15));
cylinders=80;;
1.44) [ $file_size -ge $bk_144 ] && error wont_fit;
heads=2;
sectors=18;
cyl_size=$((2 * 18));
cylinders=80;;
1.60) [ $file_size -ge $bk_160 ] && error wont_fit;
heads=2;
sectors=20;
cyl_size=$((2 * 20));
cylinders=80;
geo_option="-F";;
1.68) [ $file_size -ge $bk_168 ] && error wont_fit;
heads=2;
sectors=21;
cyl_size=$((2 * 21));
cylinders=80;;
1.74) [ $file_size -ge $bk_174 ] && error wont_fit;
heads=2;
sectors=21;
cyl_size=$((2 * 21));
cylinders=83;;
2.88) [ $file_size -ge $bk_288 ] && error wont_fit;
heads=2;
sectors=36;
cyl_size=$((2 * 36));
cylinders=80;;
*) error bug;;
esac
type_option="-t $image_type"
# We start by creating a virtual disk which size is the number of
# cylinders of $cyl_size mandatory to put the files stocked in the $tarfile
# Create the empty virtual disk
dd if=/dev/zero of=$image bs=$block_size count=$(($cyl_size * $cylinders))
# We then format the virtual disk
# NOTE: the El Torito specification wants only one partition. So we
# create the first, and the remaining 3 entries are empty.
if [ "$image_type" = "hd" ]; then
sfdisk -C $cylinders -H $heads -S $sectors -D $image<<EOT
,,$part_id,*,0,1,1
EOT
offset="$(($sectors * $block_size))"
type_option=
else
offset="0"
fi
# It's time now to create the filesystem on the first partition.
mkbimage_mkfs
# then untar the files
[ ! -e ${image}1 ] || { echo "${image}1 exists, please remove it first"; exit 1;}
mkdir -p ${image}1
$decompress $tarfile | tar -C ${image}1 $debug -xf -
# copy the untarred files into the filesystem image
mkbimage_cp
#We verify that the stage2 exists and we search the name
stage2_os_name=`find ${image}1 -name stage2 -type f`
[ -r "$stage2_os_name" ] || { echo "I can't find stage2!"; exit 1;}
#------------------------- GRUB stuff
if [ "$image_type" = "hd" ]; then
device='(hd0)'
root='(hd0,0)'
else
device='(fd0)'
root='(fd0)'
fi
cat<<EOT >$device_map
$device ${image}
EOT
${GRUB_PATH}grub --device-map=$device_map --batch<<EOT
geometry $device $cylinders $heads $sectors
root $root
setup $device
geometry $geo_option -w $type_option $device $cylinders $heads $sectors
EOT
echo "-------------------WHAT'S NEXT?-------------------------------------"
echo
cat <<EOF
If you have created an image aimed to a floppy, then something like:
dd if=<type>.image of=/dev/fd0[u<size>] bs=512
will be more than enough... if you have formated the floppy correctly
using \`superformat' to be found in \`fdutils' package.
For El Torito floppy emulation :
mkisofs -b <image> -c boot.catalog -o raw.iso <dir>
And for El Torito Hard Disk emulation:
mkisofs -b <image> -hard-disk-boot -c boot.catalog -o raw.iso <dir>
Enjoy!
EOF
rm -rf ${image}1
exit 0