1 #!/bin/sh

2

3 # mkdiskimg - prepare a disk image for the kernel

4 # usage: mkdiskimg [size in mb, default: 40]

5

6 imgfile=disk.img

7 if [ -e $imgfile ]; then

8 echo "file '$imgfile' exists, will not overwrite, delete it first" >&2

9 exit 1

10 fi

11

12 if [ -n "$1" ]; then

13 sizemb=$1

14 else

15 sizemb=40

16 fi

17

18 # create the image file

19 echo 'creating image file ...'

20 dd if=/dev/zero of=$imgfile bs=1M count=$sizemb || exit 1

21

22 # create partition table

23 if ! sfdisk --version | grep linux; then

24 echo "failed to find the linux sfdisk program."

25 echo "please install it, or create a partition on the disk image ($imgfile) manually."

26 exit 0

27 fi

28

29 echo 'creating partition table with a single partition ...'

30 sfdisk -q $imgfile <<EOF

31 ,,cc

32 EOF

33 if [ $? != 0 ]; then

34 echo 'failed to create partition' >&2

35 exit 1

36 fi

37

38 echo

39 echo 'done. happy hacking!'