init

#!/bin/busybox sh

echo -n -e "For initramfs shell press [enter] within 3 seconds..."
read -t 1 && exec /bin/sh
echo -n -e "\e[0K\rFor initramfs shell press [enter] within 2 seconds..."
read -t 1 && exec /bin/sh
echo -n -e "\e[0K\rFor initramfs shell press [enter] within 1 second..."
read -t 1 && exec /bin/sh || echo

echo "Proceeding with normal bootup"

/bin/mount --make-private / # move mount won't work for shared or slave mounts

# Mount the kindle's fat32 partition so we can access the fread.ext4 file
echo "Mounting fat32 partition"
/sbin/losetup -o 8192 /dev/loop/0 /dev/mmcblk0p4 # for some reason we need a 8192 byte offset
/bin/mkdir -p /mnt/us # ensure mountpoint exists
/bin/mount -t vfat -o defaults,noatime,utf8,noexec,shortname=mixed /dev/loop/0 /mnt/us

echo "Mounting fread userland"
/sbin/losetup /dev/loop/1 /mnt/us/fread/fread.ext4
/bin/mkdir -p /mnt/fread # ensure mountpoint exists
/bin/mount -t ext4 -o defaults,noatime /dev/loop/1 /mnt/fread
/bin/mkdir -p /mnt/fread/mnt/us # ensure nested fat32 mountpoint exists

echo "Moving fat32 mount point into fread userland"
/bin/mount --move /mnt/us /mnt/fread/mnt/us # move mount point

echo "Mounting /proc and /sys"
/bin/mount -t proc proc  /mnt/fread/proc
/bin/mount -t sysfs sysfs /mnt/fread/sys

echo "Switching to fread userland"
exec /usr/sbin/chroot /mnt/fread /sbin/init 5