nuclear@83: #!/bin/sh
nuclear@83: 
nuclear@83: # mkdiskimg - prepare a disk image for the kernel
nuclear@83: # usage: mkdiskimg [size in mb, default: 40]
nuclear@83: 
nuclear@83: imgfile=disk.img
nuclear@83: if [ -e $imgfile ]; then
nuclear@83: 	echo "file '$imgfile' exists, will not overwrite, delete it first" >&2
nuclear@83: 	exit 1
nuclear@83: fi
nuclear@83: 
nuclear@83: if [ -n "$1" ]; then
nuclear@83: 	sizemb=$1
nuclear@83: else
nuclear@83: 	sizemb=40
nuclear@83: fi
nuclear@83: 
nuclear@83: # create the image file
nuclear@83: echo 'creating image file ...'
nuclear@83: dd if=/dev/zero of=$imgfile bs=1M count=$sizemb || exit 1
nuclear@83: 
nuclear@83: # create partition table
nuclear@83: if ! sfdisk --version | grep linux; then
nuclear@83: 	echo "failed to find the linux sfdisk program."
nuclear@83: 	echo "please install it, or create a partition on the disk image ($imgfile) manually."
nuclear@83: 	exit 0
nuclear@83: fi
nuclear@83: 
nuclear@83: echo 'creating partition table with a single partition ...'
nuclear@83: sfdisk -q $imgfile <<EOF
nuclear@83: ,,cc
nuclear@83: EOF
nuclear@83: if [ $? != 0 ]; then
nuclear@83: 	echo 'failed to create partition' >&2
nuclear@83: 	exit 1
nuclear@83: fi
nuclear@83: 
nuclear@83: echo
nuclear@83: echo 'done. happy hacking!'