kern
annotate mkdiskimg @ 94:b3351d018ac6
read/write superblock, get/put inode
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 11 Dec 2011 11:12:30 +0200 |
| parents | 4dd35ccceba1 |
| children |
| rev | line source |
|---|---|
| nuclear@83 | 1 #!/bin/sh |
| nuclear@83 | 2 |
| nuclear@85 | 3 SUDO=${SUDO:-sudo} |
| nuclear@85 | 4 if [ `id -u` = 0 ]; then |
| nuclear@85 | 5 unset SUDO |
| nuclear@85 | 6 fi |
| nuclear@85 | 7 |
| nuclear@83 | 8 # mkdiskimg - prepare a disk image for the kernel |
| nuclear@83 | 9 # usage: mkdiskimg [size in mb, default: 40] |
| nuclear@83 | 10 |
| nuclear@83 | 11 imgfile=disk.img |
| nuclear@83 | 12 if [ -e $imgfile ]; then |
| nuclear@83 | 13 echo "file '$imgfile' exists, will not overwrite, delete it first" >&2 |
| nuclear@83 | 14 exit 1 |
| nuclear@83 | 15 fi |
| nuclear@83 | 16 |
| nuclear@83 | 17 if [ -n "$1" ]; then |
| nuclear@83 | 18 sizemb=$1 |
| nuclear@83 | 19 else |
| nuclear@83 | 20 sizemb=40 |
| nuclear@83 | 21 fi |
| nuclear@83 | 22 |
| nuclear@83 | 23 # create the image file |
| nuclear@83 | 24 echo 'creating image file ...' |
| nuclear@83 | 25 dd if=/dev/zero of=$imgfile bs=1M count=$sizemb || exit 1 |
| nuclear@83 | 26 |
| nuclear@84 | 27 mkpart_linux() |
| nuclear@84 | 28 { |
| nuclear@84 | 29 sfdisk -q $imgfile <<EOF |
| nuclear@84 | 30 ,,cc |
| nuclear@84 | 31 EOF |
| nuclear@84 | 32 } |
| nuclear@84 | 33 |
| nuclear@84 | 34 mkpart_fbsd() |
| nuclear@84 | 35 { |
| nuclear@85 | 36 devfile=`$SUDO mdconfig -a -t vnode -f $imgfile` |
| nuclear@85 | 37 if [ $? != 0 ]; then |
| nuclear@85 | 38 echo "failed to map $imgfile as a memory device, need root" >&2 |
| nuclear@85 | 39 exit 1 |
| nuclear@85 | 40 fi |
| nuclear@85 | 41 |
| nuclear@85 | 42 $SUDO fdisk -q -f - /dev/$devfile <<EOF |
| nuclear@84 | 43 p 1 204 * * |
| nuclear@84 | 44 EOF |
| nuclear@85 | 45 $SUDO mdconfig -d -u $devfile |
| nuclear@84 | 46 } |
| nuclear@84 | 47 |
| nuclear@83 | 48 # create partition table |
| nuclear@84 | 49 echo 'creating partition table with a single partition ...' |
| nuclear@85 | 50 sys=`uname -s` |
| nuclear@84 | 51 if [ $sys = Linux ]; then |
| nuclear@84 | 52 mkpart_linux |
| nuclear@85 | 53 elif [ $sys = FreeBSD ]; then |
| nuclear@85 | 54 mkpart_fbsd |
| nuclear@84 | 55 else |
| nuclear@84 | 56 echo "don't know how to partition the image on your system." |
| nuclear@84 | 57 echo "please create a partition in the disk image ($imgfile) manually." |
| nuclear@83 | 58 exit 0 |
| nuclear@83 | 59 fi |
| nuclear@84 | 60 |
| nuclear@83 | 61 if [ $? != 0 ]; then |
| nuclear@83 | 62 echo 'failed to create partition' >&2 |
| nuclear@83 | 63 exit 1 |
| nuclear@83 | 64 fi |
| nuclear@83 | 65 |
| nuclear@83 | 66 echo |
| nuclear@83 | 67 echo 'done. happy hacking!' |