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#!/bin/busybox sh
ROOT=/dev/disk/by-label/rootfs
HOME=/dev/disk/by-uuid/092fdc4a-4356-47d9-9272-9a5f58e33bbf
prep_dev()
{
for opt in `cat /proc/cmdline`; do
name=$(echo $opt | cut -d'=' -f 1)
if [ $name == "root" ] || [ $name == "resume" ] || [ $name == "crypt_part" ]; then
type=$(echo $opt | cut -d'=' -f 2)
id=$(echo $opt | cut -d'=' -f 3)
if [ $type == LABEL ]; then
prefix="/dev/disk/by-label";
elif [ $type == UUID ]; then
prefix="/dev/disk/by-uuid"
fi
mkdir -p $prefix
full="$prefix/$id"
if [ ! -e $full ]; then
ln -s $(findfs "$type=$id") $full
fi
fi
done
}
rescue_shell()
{
echo "Something went wrong. Dropping you to a shell."
busybox --install -s
exec /bin/sh
}
cryptsetup_do()
{
echo "cryptsetup $1 $2"
cryptsetup -T 3 luksOpen $1 $2
}
mount_root()
{
echo "mount root $1"
mount $1 /newroot
}
# setup directories
mkdir -p /dev /proc /sys /newroot
# Mount the /dev, /proc and /sys filesystems.
mount -t devtmpfs none /dev
mount -t proc none /proc
mount -t sysfs none /sys
# Do your stuff here.
prep_dev
cryptsetup_do $HOME home
mount_root $ROOT || rescue_shell
# Clean up.
umount /dev
umount /proc
umount /sys
# Boot the real thing.
exec switch_root /newroot /sbin/init
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