#!/bin/sh

export PATH=/usr/bin:/usr/sbin

export SYSTEMD_IN_INITRD=lenient

[ -e /proc/mounts ] ||

	(mkdir -p /proc && mount -t proc -o nosuid,noexec,nodev proc /proc)

grep -q '^sysfs /sys sysfs' /proc/mounts ||

	(mkdir -p /sys && mount -t sysfs -o nosuid,noexec,nodev sysfs /sys)

grep -q '^none / ' /proc/mounts || grep -q '^rootfs / ' /proc/mounts && ROOTFS_IS_RAMFS=1

if [ -f /proc/device-tree/rtas/ibm,kernel-dump ] || [ -f /proc/device-tree/ibm,opal/dump/mpipl-boot ]; then

	mkdir /newroot

	mount -t ramfs ramfs /newroot

	if [ $ROOTFS_IS_RAMFS ]; then

		for FILE in $(ls -A /fadumproot/); do

			mv /fadumproot/$FILE /newroot/

		done

		exec switch_root /newroot /init

	else

		mkdir /newroot/sys /newroot/proc /newroot/dev /newroot/run /newroot/oldroot

		grep -q '^devtmpfs /dev devtmpfs' /proc/mounts && mount --move /dev /newroot/dev

		grep -q '^tmpfs /run tmpfs' /proc/mounts && mount --move /run /newroot/run

		mount --move /sys /newroot/sys

		mount --move /proc /newroot/proc

		cp --reflink=auto --sparse=auto --preserve=mode,timestamps,links -dfr /fadumproot/. /newroot/

		cd /newroot && pivot_root . oldroot

		loop=1

		while [ $loop ]; do

			unset loop

			while read -r _ mp _; do

				case $mp in

				/oldroot/*) umount -d "$mp" && loop=1 ;;

				esac

			done 

		done

		umount -d -l oldroot

		exec /init

	fi

else

	exec /init.dracut

fi