#!/bin/sh
#
#
# http://www.sdc.org/~leila/usb-dongle/usb-filesystem/linuxrc
#
#
# devfs is not yet mounted, so don't use things like this:
#
#ROOT_DEV=/dev/loop/5
#DISK_DEV=/dev/ide/host0/bus0/target0/lun0/part4

ROOT_DEV=/dev/loop5
DISK_DEV=/dev/hda4

SECRET_START_MSG="Executing linuxrc on the USB thingy..."
SECRET_PW_PROMPT="WHEE-DOGGIE-PASSWORD: "

GPG_HOMEDIR=/root/.gnupg
DISK_ENCRYPT_IV=/root/hard-disk-keyfile.gpg
DISK_ENCRYPT_METHOD=aes-cbc-128

###################################################################

echo $SECRET_START_MSG

	# /proc/filesystems now needed by BB's mount.
	echo "Mounting proc (mount -n -t proc none /proc)..."
	mount -n -t proc none /proc

	echo "(unmounting the grub-initrd ramdisk...)"
	umount /initrd

	# echo "Remounting the USB thingy read-write..."

	########

	echo -n $SILLY_PROMPT

	/usr/bin/gpg --homedir $GPG_HOMEDIR \
	   --batch   --no-tty --passphrase-fd 0 -q \
	    -d $DISK_ENCRYPT_IV | \
	    /sbin/losetup -e $DISK_ENCRYPT_METHOD -p 0 \
	 	$ROOT_DEV $DISK_DEV

	echo "Mounting real root dev (mount $ROOT_DEV /new_root)..."
	mount -n $ROOT_DEV /new_root

	umount /proc

	cd /new_root
	echo "Running pivot_root (/sbin/pivot_root . initrd)..."
	/sbin/pivot_root . initrd
	hash -r # Use, for example /usr/bin/[ instead of /bin/[ now.

	# Kernel automatically mounted devfs the first time, but now we must.
	#if [ -c initrd/dev/.devfsd ]; then
	#	echo "Mounting devfs (mount -n -t devfs none dev)..."
	#	mount -n -t devfs none dev
	#	# Old /dev (/initrd/dev) needs to be umounted after init 
	#	# is executed.  Rc.sysinit can do this.
	#else
	#	echo Devfs support does not seem to exist.
	#fi

	echo "Running init (exec /usr/sbin/chroot . sbin/init < dev/console 2>&1)..."
	exec /bin/chroot . sbin/init < dev/console 2>&1

exit 0