Hello, on the livecd, in the previous releases, some files and directories were moved to /etc (i.e. a writable location) and symlinks were made in their original places. However in fact one never truly knows the full list of configuration files outside /etc that someone may want to edit. Therefore I propose to take an alternative approach: use unionfs (available as a kernel patch) to pretend that the CD can be written to. Shell pseudocode for initramfs:
make /dev/cdrom mount -t isofs -o ro /dev/cdrom /.cdrom mount -t squashfs -o loop /.cdrom/squashed-rootfs.img /.squashfs mount -t tmpfs -o mode=755 tmpfs /.tmpfs mount -t unionfs -o dirs=/.tmpfs=rw:/.cdrom=ro:/.squashfs=ro unionfs /.unionfs cd /.unionfs mount --move . / exec chroot . sbin/init "$@" <dev/console >dev/console 2>dev/console No need to unpack /etc and /root anymore, they can be made just a part of the cdrom itself or of the squashed root image. This also allows to keep source tarballs on the CD outside the squashed image. Thus, the CD will also be usable e.g. from Slackware as just a container for LFS sources. -- Alexander E. Patrakov -- http://linuxfromscratch.org/mailman/listinfo/livecd FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page
