Talk:Emulating the XO

Xen Player

Is anybody doing such an emulation? Nitpicker 21:59, 5 October 2006 (EDT)

Moved from abandoned Talk:OS_images_for_emulation. MitchellNCharity 03:04, 24 May 2007 (EDT)

Temporary summary of current state

currently: quickstart is a "choice of livecd/sound/no-library/read-only or qemu/non-devel.img/no-sound/library/read-write". and devel is "mix of qemu/livecd.iso/sound/ro and qemu/-devel.img/no-sound/rw". MitchellNCharity 13:06, 24 May 2007 (EDT)

Modifying the LiveCD .iso - adding the olpc Library

The LiveCd is intended for development, and thus doesn't include the Library sample content. One wants the library when demo'ing sugar. Here is how to add it.

The next release (June?) of the LiveCd will have google as the default browser page (rather than an error message). Making adding the Library less important. A nice, simple fix. MitchellNCharity 13:03, 5 June 2007 (EDT)

The LiveCD is currently created manually every month or two.

Getting /home/olpc/Libary

Alternatives:

• Snarf a copy from an xo disk image (the ext3.img variety).

mkdir tmp_img
mount -o loop,offset=33174 olpc-redhat-stream-development-ext3.img tmp_img

The Libary is in tmp_img/home/olpc/Library. The offset=NNNNN may need to be adjusted. See Emulating the XO/Help and tips.

• As of 2006-06-01, there is a snapshot:

wget http://dev.laptop.org/pub/content/lib-4-6.tar.gz

Get squashfs

Get squashfs. On fc6,

yum install squashfs-tools

Add the library

wget http://olpc.download.redhat.com/olpc/streams/sdk/latest/livecd/olpc-redhat-stream-sdk-livecd.iso

As root

mkdir tmp_iso
mount -o loop -t iso9660 olpc-redhat-stream-sdk-livecd.iso tmp_iso
/usr/sbin/unsquashfs -dest tmp_squashfs tmp_iso/squashfs.img  # about 4GB

file tmp_squashfs/os.img
## tmp_squashfs/os.img: x86 boot sector; partition 1: ID=0x83, starthead 1, startsector 62, 8388290 sectors, extended partition table (last)\011
## 62 * 512 = 31744
mkdir tmp_os
mount -o loop,offset=31744 -t ext3 tmp_squashfs/os.img tmp_os

mkdir tmp_os/home/olpc/Library
(cd dev.laptop.org/pub/content/library/; tar cf - .)|(cd tmp_os/home/olpc/Library; tar xf -)
chown -R 500:500 tmp_os/home/olpc/Library

umount tmp_os
/sbin/mksquashfs tmp_squashfs squashfs.img.new

mkdir tmp_iso2
(cd tmp_iso; tar cf - .)|(cd tmp_iso2; tar xpf -)
umount tmp_iso
mkisofs -v -r -T -J -V 'Modified LiveCd mumble' -l -R -c boot.catalog -b squashfs.img -o new.iso tmp_iso2  ##XXX - wrong - doesn't work

Notes:

• Unfinished.
• Could be cleaned up. And parts copied out into Help_and_tips.
• http://git.fedoraproject.org/?p=pilgrim/.git;a=summary
• http://git.fedoraproject.org/?p=hosted/livecd