Eeepc "fastinit" reimplementations
----------------------------------

finit.c is a reimplementation of the Asus Eeepc fastinit program based
on its library calls. It tries to be an accurate re-creation and keeps
the original bugs and lack of optimization.

finit-mod.c is a fixed/improved version of finit.c.

finit-alt.c is a fixed/improved version of finit.c for alternative Linux
distributions running on the Eeepc (previously ffinit.c). Currently able
to boot unmodified Mandriva Linux.

See Makefile for configurable parameters to better suit your system.


* Eeepc boot process

The essential steps in the boot process carried out in initramfs are:

 ROOT=`sed 's!.*root=\([^ ]*\).*!\1!' < /proc/cmdline`
 mount -t proc proc /proc
 mount -t ext2 -o ro $ROOT /mnt-system
 mount -t ext3 -o rw /dev/sda2 /mnt-user
 mount -t unionfs -o dirs=/mnt-user=rw:/mnt-system=ro unionfs /mnt
 mount --move /mnt-system /mnt/mnt
 umount -l /mnt-user
 umount /proc
 exec switch_root /mnt /sbin/fastinit "$@" </mnt/dev/console >/mnt/dev/console

If mounting the root filesystem fails, execute a maintenance shell. If
mounting the user filesystem fails, fsck and reboot.


* Utilities available in the Eeepc initramfs busybox:

[		cat		cp		cut		dd
dmesg		echo		env		expr		false
grep		insmod		ln		losetup		ls
mdev		mkdir		mknod		mount		mv
pivot_root	realpath	rm		rmmod		sed
sh		sleep		switch_root	test		true
umount		vi


* Devices in the Eeepc initramfs /dev:

console  fb  null  ram0  sda1  sda2  sda3  sr0  tty0


Reboot and poweroff
-------------------

Stock reboot and poweroff utilities of a modern Linux distribution may not
work correctly with finit. You can replace them with simple scripts that
send SIGUSR1 to finit for reboot, SIGUSR2 for poweroff.