I've spent the last couple of days trying to work out
how to create a HD image containing a
filesystem(ext2fs, ufs, fat32 not bothered at this
stage) with Grub installed.
I found a script 'mkbimage' which seems to be for
linux. Using what I had figured out at that stage I
managed to hack it around and can now create a floppy
disk image and boot it in bochs IA32 emulator. The
problem is I cant work out how to create a HD image.
Appended to this post is the script. As i've been
hacking it further it currently does not create a
filesystem on the image. Previously though I had it to
the stage where it would create the fs, mount it and
copy in the 'stuff'. The problem then was grub refused
to use the image complaing of a corrupt partition
table. Also I was unsure how the fact that their where
no BSD sub partitions would effect things - but as I
could mount the partition from FreeBsd I figured Grub
would be able to mount it too.
I am new to unix and now feeling a little frustrated.
I would greatly appreciate ANY help.
Thanks in advance
Ryan
my - mkimage -
My Appologies for the duplication in the script but I
dont know how else to get these things out to the
console.
As I mentioned above this version does not even create
a fs now ..... zzz
#!/bin/sh
# MaKe a Bootable IMAGE --- 1.44, 2.88 and El Torito
no-emulation mode
# C) 2001 Thierry Laronde <[EMAIL PROTECTED]>
# 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 1.2 2001/10/14 15:19:55 tlaronde Exp
$
# Global variables
tarfile=
dir=
fs= #file system type
decompress=
image_type=
#----------------------------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=
fdisk_config=
disklabel_config=
sectorspcylinder=
sectorspunit=
# Name by which this script was invoked.
program=`echo "$0" | sed -e 's/[^\/]*\///g'`
mkbimage_version='$Id: mkbimage,v 1.2 2001/10/14
15:19:55 tlaronde Exp $'
usage="
Usage: $program [-h] [-V] [-t TYPE] [-d DIRECTORY] [-s
FS_TYPE] -f TAR_FILE
Make a Bootable IMAGE using GRUB as a bootloader
Options:
Actions:
-d DIRECTORY [default CWD]
Directory where the boot.image and the
partition subdirectories
are/will be created
-f TAR_FILE
Name of the tar file containing the filesystem
to install. Can
be a pure tar file [.tar] or a compressed tar
file
[.tar.gz|.tar.bz2]
-s FS_TYPE
Type of the file system to create on the
virtual disk [default
is ext2]. XXX: At the moment the script has
been designed for ext2.
-t TYPE
Type of the image to create. Choices are
'1.20', '1.44', '1.68', '1.74'
'2.88' or 'hd' [default is hd]
Informations:
-h display this Help and exit
-V display Version information and exit
Copyright (c) 2001 Thierry Laronde
<[EMAIL PROTECTED]>. GPLed."
version="$mkbimage_version
Written by Thierry Laronde.
Copyright (c) 2001 Thierry Laronde
<[EMAIL PROTECTED]>.
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 "$usage";;
must_be_root) echo "You must be root!";;
unknown_format) echo "The tar file must be
.tar|.tar.gz|.tar.bz2 !";;
wont_fit) echo "The files won't fit on the
selected type of media!";;
wrong_directory) echo "Directory inexistant or
not given!";
echo "$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
}
#**********************************************************************
# 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="$1";;
-h) echo "$usage"; exit 0;;
-V) echo "$version"; exit 0;;
*) error option ;;
esac
shift
done
#---------------------- Must be root
[ ! `id -u` -eq 0 ] && error must_be_root;
[ ! "$tarfile" ] && error missing_argument;
[ ! -s "$tarfile" ] && error wrong_file;
if [ ! "$image_type" ]; then
image_type=hd;
elif [ "$image_type" != "1.20" -a "$image_type" !=
"1.44" \
-a "$image_type" != "1.68" \
-a "$image_type" != "2.88" -a "$image_type" !=
"1.74" \
-a "$image_type" != "hd" -a "$image_type" != "1.60"
] ; then
error wrong_type ;
fi
#---------------------- Initializations
[ ! "$dir" ] && dir=`pwd`
[ ! "$fs" ] && fs=ext2
# What type of tar file has been given ?
suffix=`echo "$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
image=$dir/$image_type.image
device_map=$dir/device.map
fdisk_config=$dir/fdiskconfig
disklabel_config=$dir/disklabelconfig
# First, find the size of the tar file in block_size.
file_size=`$decompress $tarfile | wc -c | tr -d ' '`
file_size=$(($file_size / $block_size + 1))
case "$image_type" in
hd) heads=16;
sectors=63;
cyl_size=$((16 * 63));
# One cylinder for MBR and one to round up
cylinders=$(($file_size / $cyl_size + 2));
sectorspcylinder=$(($sectors * $heads));
sectorspunit=$(($sectors * $cylinders * $heads));;
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 $image_type"
[ "$image_type" = "1.60" ] && type_option=
# 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 $tarfile
# We then create the empty virtual disk
dd if=/dev/zero of=$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.
echo vnconfig -s labels -c vn0 $image
vnconfig -s labels -c vn0 $image
echo disklabel -r -w vn0 auto
disklabel -r -w vn0 auto
if [ "$image_type" = "hd" ]; then
cat<<EOT >$disklabel_config
# /dev/vn0c:
type: unknown
disk: amnesiac
label:
flags:
bytes/sector: 512
sectors/track: $sectors
tracks/cylinder: $heads
sectors/cylinder: $sectorspcylinder
cylinders: $cylinders
sectors/unit: $sectorspunit
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize
bps/cpg]
c: $sectorspunit 0 unused 0
0 # (Cyl. 0 - 9*)
EOT
cat<<EOT
# /dev/vn0c:
type: unknown
disk: amnesiac
label:
flags:
bytes/sector: 512
sectors/track: $sectors
tracks/cylinder: $heads
sectors/cylinder: $sectorspcylinder
cylinders: $cylinders
sectors/unit: $sectorspunit
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # milliseconds
track-to-track seek: 0 # milliseconds
drivedata: 0
8 partitions:
# size offset fstype [fsize bsize
bps/cpg]
c: $sectorspunit 0 unused 0
0 # (Cyl. 0 - 9*)
EOT
echo disklabel -R vn0 $disklabel_config
disklabel -R vn0 $disklabel_config
cat<<EOT
g c$cylinders h$heads s$sectors
EOT
cat<<EOT >$fdisk_config
g c$cylinders h$heads s$sectors
EOT
fdisk -f $fdisk_config /dev/vn0
fdisk /dev/vn0
fi
echo newfs /dev/vn0c
newfs /dev/vn0c
mkdir ${image}1 2>/dev/null
mount /dev/vn0 ${image}1
$decompress $tarfile | tar -C ${image}1 -xf -
# Find stage2 name
stage2=
while [ ! "$stage2" ]; do
stage2=`find ${image}1 -type f -name stage2
2>/dev/null`
done
sync
umount ${image}1
#------------------------- GRUB stuff
if [ "$image_type" = "hd" ]; then
device='(hd0)'
root='(hd0,0,a)'
else
device='(fd0)'
root='(fd0)'
fi
cat<<EOT >$device_map
$device /dev/vn0c
EOT
grub --device-map=$device_map --batch<<EOT
geometry $device $cylinders $heads $sectors
root $root
setup $device
quit
EOT
vnconfig -u vn0
echo "-------------------WHAT'S
NEXT--------------------"
echo
echo
cat <<EOF
Enjoy!
EOF
exit 0
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