79 lines
1.9 KiB
Bash
Executable File
79 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
|
|
#
|
|
# mkusbimg - creates a bootable disk image
|
|
# Copyright (C) 2008 Simo Leone <simo@archlinux.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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
|
|
|
|
# usage(exitvalue)
|
|
# outputs a usage message and exits with value
|
|
APPNAME=$(basename "${0}")
|
|
usage()
|
|
{
|
|
echo "usage: ${APPNAME} <imageroot> <imagefile>"
|
|
exit $1
|
|
}
|
|
|
|
##################################################
|
|
|
|
if [ $# -ne 2 ]; then
|
|
usage 1
|
|
fi
|
|
|
|
DISKIMG="${2}"
|
|
IMGROOT="${1}"
|
|
TMPDIR=$(mktemp -d)
|
|
FSIMG=$(mktemp)
|
|
|
|
# ext2 overhead's upper bound is 6%
|
|
# empirically tested up to 1GB
|
|
rootsize=$(du -bs ${IMGROOT}|cut -f1)
|
|
IMGSZ=$(( (${rootsize}*106)/100/512 + 1)) # image size in sectors
|
|
|
|
# create the filesystem image file
|
|
dd if=/dev/zero of="$FSIMG" bs=512 count="$IMGSZ"
|
|
|
|
# create a filesystem on the image
|
|
mke2fs -m 0 -F "$FSIMG"
|
|
|
|
# mount the filesystem and copy data
|
|
mount -o loop "$FSIMG" "$TMPDIR"
|
|
cp -a "$IMGROOT"/* "$TMPDIR"
|
|
|
|
# unmount filesystem
|
|
umount "$TMPDIR"
|
|
|
|
# add sectors 0-62, then glue together
|
|
dd if=/dev/zero of="$DISKIMG" bs=512 count=63
|
|
cat "$FSIMG" >> "$DISKIMG"
|
|
|
|
# create a partition table
|
|
# if this looks like voodoo, it's because it is
|
|
sfdisk -uS -f "$DISKIMG" << EOF
|
|
63,$IMGSZ,83,*
|
|
0,0,00
|
|
0,0,00
|
|
0,0,00
|
|
EOF
|
|
|
|
# install grub on the image
|
|
grub --no-floppy --batch << EOF
|
|
device (hd0) $DISKIMG
|
|
root (hd0,0)
|
|
setup (hd0)
|
|
EOF
|
|
|
|
# all done :)
|
|
rm -fr "$TMPDIR" "$FSIMG"
|