path: root/defaults/linuxrc

#!/bin/sh

# shellcheck source=initrd.defaults
. /etc/initrd.defaults
# shellcheck source=initrd.scripts
. /etc/initrd.scripts

# shellcheck source=/dev/null
[ -e /etc/initrd.splash ] && . /etc/initrd.splash

# Basic /dev content, we need it as fast as possible.
[ ! -e /dev/console ]  && mknod /dev/console c 5 1
[ ! -e /dev/null ]     && mknod /dev/null c 1 3
[ ! -e /dev/random ]   && mknod /dev/random c 1 8
[ ! -e /dev/tty ]      && mknod /dev/tty c 5 0
[ ! -e /dev/tty0 ]     && mknod /dev/tty0 c 4 0
[ ! -e /dev/tty1 ]     && mknod /dev/tty1 c 4 1
[ ! -e /dev/ttyS0 ]    && mknod /dev/ttyS0 c 4 64
[ ! -e /dev/ttyS1 ]    && mknod /dev/ttyS1 c 4 65
[ ! -e /dev/urandom ]  && mknod /dev/urandom c 1 9
[ ! -e /dev/zero ]     && mknod /dev/zero c 1 5

# Take control
CONSOLE="/dev/$(get_active_console)"
exec 0<>${CONSOLE} 1<>${CONSOLE} 2<>${CONSOLE}

if [ "$$" != '1' ]
then
	echo '/linuxrc has to be run as the init process as the one'
	echo 'with a PID of 1. Try adding init="/linuxrc" to the'
	echo 'kernel command line or running "exec /linuxrc".'
	exit 1
fi

mount -t proc -o noexec,nosuid,nodev proc /proc >/dev/null 2>&1
mount -o remount,rw / >/dev/null 2>&1
mount -t tmpfs -o rw,nosuid,nodev,relatime,mode=755 none /run 2>&1

if [ ! -d /run/initramfs ]
then
	mkdir -p /run/initramfs
	chmod 0750 /run/initramfs
fi

# Prevent superfluous printks from being printed to the console
echo 1 > /proc/sys/kernel/printk

if [ ! -s /etc/ld.so.cache ]
then
	# Looks like we were unable to run ldconfig during initramfs generation
	hash ldconfig >/dev/null 2>&1 && run ldconfig
fi

# Set up symlinks
run busybox --install -s

gk_ver="$(cat /etc/build_id)"
gk_build_date="$(cat /etc/build_date)"
kernel_ver="$(uname -r)"

CMDLINE=$(cat /proc/cmdline)
# Scan CMDLINE for any specified real_root= or cdroot arguments
FAKE_ROOT=''
FAKE_INIT=''
FAKE_ROOTFLAGS=''
ROOTFSTYPE='auto'
CRYPT_SILENT=0
QUIET=''

run mkdir -p /etc/cmdline /etc/modprobe.d
for x in ${CMDLINE}
do
	case "${x}" in
		real_root=*)
			REAL_ROOT=${x#*=}
		;;
		root=*)
			FAKE_ROOT=${x#*=}
		;;
		subdir=*)
			SUBDIR=${x#*=}
		;;
		real_init=*)
			REAL_INIT=${x#*=}
		;;
		init=*)
			FAKE_INIT=${x#*=}
		;;
		# Livecd options
		cdroot)
			CDROOT=1
		;;
		cdroot=*)
			CDROOT=1
			CDROOT_DEV=${x#*=}
		;;
		cdroot_type=*)
			CDROOT_TYPE=${x#*=}
		;;
		cdroot_marker=*)
			CDROOT_MARKER=${x#*=}
		;;
		# Start livecd loop, looptype options
		loop=*)
			LOOP=${x#*=}
		;;
		looptype=*)
			LOOPTYPE=${x#*=}
		;;
		isoboot=*)
			ISOBOOT=${x#*=}
		;;
		# Start Volume manager options
		dolvm)
			USE_LVM_NORMAL=1
		;;
		domdadm)
			USE_MDADM=1
		;;
		dodmraid)
			USE_DMRAID_NORMAL=1
		;;
		dodmraid=*)
			DMRAID_OPTS=${x#*=}
			USE_DMRAID_NORMAL=1
		;;
		domultipath)
			USE_MULTIPATH_NORMAL=1
		;;
		dozfs*)
			USE_ZFS=1

			case "${x#*=}" in
				*force*)
					ZPOOL_FORCE=-f
				;;
			esac

			case "${x#*=}" in
				*cache*)
					if [ -s "/etc/zfs/zpool.cache" ]
					then
						ZPOOL_CACHE="-c /etc/zfs/zpool.cache"
					else
						bad_msg "zpool.cache not found or empty, zpool import will be slow"
					fi
				;;
			esac
		;;
		quiet|quiet_genkernel)
			QUIET=1
		;;
		# Debug Options
		debug)
			run touch "${GK_DEBUGMODE_STATEFILE}"
		;;
		# Scan delay options
		scandelay=*)
			SDELAY=${x#*=}
		;;
		scandelay)
			SDELAY=3
		;;
		rootdelay=*|rootwait=*)
			ROOTDELAY=${x#*=}
		;;
		rootdelay|rootwait)
			ROOTDELAY=5
		;;
		firstmods=*)
			FIRSTMODS=$(echo ${FIRSTMODS} ${x#*=} | sed -e 's/^\ *//;s/,/ /g')
			;;
		# Module no-loads
		doload=*)
			MDOLIST=$(echo ${MDOLIST} ${x#*=} | sed -e 's/^\ *//;s/,/ /g')
		;;
		noload=*)
			MLIST=$(echo ${MLIST} ${x#*=} | sed -e 's/^\ *//;s/,/ /g')
			export MLIST
		;;
		# /dev/md
		lvmraid=*)
			warn_msg "'${x}' kernel command-line argument is deprecated; Use 'dolvm' instead!"
			USE_LVM_NORMAL=1
		;;
		part=*)
			MDPART=${x#*=}
		;;
		part|partitionable)
			MDPART=1
		;;
		# For network options see start_network() in initrd.scripts
		# NFS
		nfsroot=*)
			NFSROOT=${x#*=}
		;;
		# iSCSI
		iscsi_initiatorname=*)
			ISCSI_INITIATORNAME=${x#*=}
		;;
		iscsi_target=*)
			ISCSI_TARGET=${x#*=}
		;;
		iscsi_tgpt=*)
			ISCSI_TGPT=${x#*=}
		;;
		iscsi_address=*)
			ISCSI_ADDRESS=${x#*=}
		;;
		iscsi_port=*)
			ISCSI_PORT=${x#*=}
		;;
		iscsi_username=*)
			ISCSI_USERNAME=${x#*=}
		;;
		iscsi_password=*)
			ISCSI_PASSWORD=${x#*=}
		;;
		iscsi_username_in=*)
			ISCSI_USERNAME_IN=${x#*=}
		;;
		iscsi_password_in=*)
			ISCSI_PASSWORD_IN=${x#*=}
		;;
		iscsi_debug=*)
			ISCSI_DEBUG=${x#*=}
		;;
		iscsi_noibft)
			ISCSI_NOIBFT=1
		;;
		# Crypto
		crypt_root=*)
			CRYPT_ROOT=${x#*=}
			USE_CRYPTSETUP=1
		;;
		crypt_root_options=*)
			CRYPT_ROOT_OPTIONS=$(echo ${CRYPT_ROOT_OPTIONS} ${x#*=} | sed -e 's/,/ /g')
		;;
		crypt_swap=*)
			CRYPT_SWAP=${x#*=}
			USE_CRYPTSETUP=1
		;;
		crypt_swap_options=*)
			CRYPT_SWAP_OPTIONS=$(echo ${CRYPT_SWAP_OPTIONS} ${x#*=} | sed -e 's/,/ /g')
		;;
		root_key=*)
			CRYPT_ROOT_KEY=${x#*=}
		;;
		root_keydev=*)
			CRYPT_ROOT_KEYDEV=${x#*=}
		;;
		root_keydev_fstype=*)
			CRYPT_ROOT_KEYDEV_FSTYPE=${x#*=}
		;;
		root_trim=*)
			tmp_enabled=${x#*=}
			if is_true "${tmp_enabled}"
			then
				CRYPT_ROOT_OPTIONS="${CRYPT_ROOT_OPTIONS} --allow-discards"
			fi
			unset tmp_enabled
		;;
		swap_key=*)
			CRYPT_SWAP_KEY=${x#*=}
		;;
		swap_keydev=*)
			CRYPT_SWAP_KEYDEV=${x#*=}
		;;
		swap_keydev_fstype=*)
			CRYPT_SWAP_KEYDEV_FSTYPE=${x#*=}
		;;
		real_resume=*|resume=*)
			REAL_RESUME=${x#*=}
		;;
		noresume)
			NORESUME=1
		;;
		crypt_silent)
			CRYPT_SILENT=1
		;;
		dosshd)
			USE_SSH=1
		;;
		gk.bootfont.disabled=*)
			tmp_disabled=${x#*=}
			if is_true "${tmp_disabled}"
			then
				GK_BOOTFONT_DISABLED=1
			fi
			unset tmp_disabled
		;;
		gk.emergency=*)
			tmp_action=${x#*=}
			case "${tmp_action}" in
				reboot)
					GK_EMERGENCY_ACTION="reboot -f"
					;;
				poweroff)
					GK_EMERGENCY_ACTION="poweroff -f"
					;;
				halt)
					GK_EMERGENCY_ACTION="halt -f"
					;;
				*)
					warn_msg "'${x}' is an unsupported emergency action -- ignored!"
					;;
			esac
			unset tmp_action
		;;
		gk.hw.load-all=*)
			tmp_disabled=${x#*=}
			if is_true "${tmp_disabled}"
			then
				GK_HW_LOAD_ALL_MODULES=1
			fi
			unset tmp_disabled
		;;
		gk.hw.use-modules_load=*)
			tmp_disabled=${x#*=}
			if is_true "${tmp_disabled}"
			then
				GK_HW_USE_MODULES_LOAD=1
			fi
			unset tmp_disabled
		;;
		gk.log.disabled=*)
			tmp_disabled=${x#*=}
			if is_true "${tmp_disabled}"
			then
				[ -f "${GK_INIT_LOG}" ] && rm "${GK_INIT_LOG}"
				GK_INIT_LOG=
				touch "${GK_INIT_LOG_DISABLED}"
			fi
			unset tmp_disabled
		;;
		gk.sshd.port=*)
			tmp_port=${x#*=}
			if is_int "${tmp_port}"
			then
				GK_SSHD_PORT=${tmp_port}
			else
				warn_msg "'${x}' does not look like a valid port -- ignored!"
			fi
			unset tmp_port
		;;
		gk.sshd.wait=*)
			tmp_wait=${x#*=}
			if is_int "${tmp_wait}"
			then
				GK_SSHD_WAIT=${tmp_wait}
			else
				warn_msg "'${x}' does not look like a valid time (second) value -- ignored!"
			fi
			unset tmp_wait
		;;
		gk.udev.debug=*)
			tmp_enabled=${x#*=}
			if is_true "${tmp_enabled}"
			then
				GK_UDEV_DEBUG=1
			fi
			unset tmp_enabled
		;;
		gk.udev.timeout=*)
			tmp_timeout=${x#*=}
			if is_int "${tmp_timeout}"
			then
				GK_UDEV_TIMEOUT=${tmp_timeout}
			else
				warn_msg "'${x}' does not look like a valid time (second) value -- ignored!"
			fi
			unset tmp_timeout
		;;
		gk.userinteraction.disabled=*)
			tmp_disabled=${x#*=}
			if is_true "${tmp_disabled}"
			then
				touch "${GK_USERINTERACTION_DISABLED_STATEFILE}"
			fi
			unset tmp_disabled
		;;
		gk.preserverun.disabled=*)
			tmp_disabled=${x#*=}
			if is_true "${tmp_disabled}"
			then
				warn_msg "gk.preserverun.disabled is set; /run will not be moved to newroot!"
				GK_PRESERVE_RUN=0
			fi
			unset tmp_disabled
		;;
		gk.prompt.timeout=*)
			tmp_timeout=${x#*=}
			if is_int "${tmp_timeout}"
			then
				GK_PROMPT_TIMEOUT=${tmp_timeout}
			else
				warn_msg "'${x}' does not look like a valid time (second) value -- ignored!"
			fi
			unset tmp_timeout
		;;
		real_rootflags=*)
			REAL_ROOTFLAGS=${x#*=}
		;;
		rootflags=*)
			FAKE_ROOTFLAGS=${x#*=}
		;;
		rootfstype=*)
			ROOTFSTYPE=${x#*=}
		;;
		keymap=*)
			keymap=${x#*=}
		;;
		locale=*)
			locale=${x#*=}
		;;
		aufs)
			aufs=1
		;;
		aufs\=*)
			aufs=1
			if echo "${x#*=}" | grep , &>/dev/null
			then
				aufs_dev_uid=${x#*,}
				aufs_dev=${x%,*}
			else
				aufs_dev=${x#*=}
			fi
		;;
		# Allow user to specify the modules location
		aufs.modules\=*)
			aufs_modules_dir=${x#*=}
			aufs_modules=1
		;;
		overlayfs)
			overlayfs=1
		;;
		overlayfs\=*)
			overlayfs=1
			if echo "${x#*=}" | grep , &>/dev/null
			then
				overlayfs_dev_uid=${x#*,}
				overlayfs_dev=${x%,*}
			else
				overlayfs_dev=${x#*=}
			fi
		;;
		# Allow user to specify the modules location
		overlayfs.modules\=*)
			overlayfs_modules_dir=${x#*=}
			overlayfs_modules=1
		;;
		unionfs)
			if [ ! -x /sbin/unionfs ]
			then
				USE_UNIONFS_NORMAL=0
				bad_msg 'unionfs binary not found: aborting use of unionfs!'
			else
				USE_UNIONFS_NORMAL=1
			fi
			;;
		nounionfs)
			USE_UNIONFS_NORMAL=0
			;;
		verify)
			VERIFY=1
		;;
	esac
done

good_msg "${gk_ver} (${gk_build_date}). Linux kernel ${kernel_ver}"

if [ "${GK_BOOTFONT_DISABLED}" = '0' -a -e /lib/console/font ]
then
	if echo "$(get_active_console)" | grep -qF ttyS
	then
		warn_msg "Active console is ${console}; Not loading embedded boot font ..."
	elif hash setfont >/dev/null 2>&1
	then
		run setfont /lib/console/font -C ${CONSOLE} 2>&1
	fi
fi

quiet_kmsg

if [ "${CDROOT}" = '0' ]
then
	if [ -z "${REAL_ROOT}" -a "${FAKE_ROOT}" != "/dev/ram0" ]
	then
		REAL_ROOT="${FAKE_ROOT}"
	fi
	if [ -z "${REAL_INIT}" -a "${FAKE_INIT}" != "/linuxrc" ]
	then
		REAL_INIT="${FAKE_INIT}"
	fi
	if [ -z "${REAL_ROOTFLAGS}" ]
	then
		REAL_ROOTFLAGS="${FAKE_ROOTFLAGS}"
	fi
fi

# Set variables based on the value of REAL_ROOT
case "${REAL_ROOT}" in
	ZFS=*)
		ZFS_POOL=${REAL_ROOT#*=}
		ZFS_POOL=${ZFS_POOL%%/*}
		USE_ZFS=1
	;;
	ZFS)
		USE_ZFS=1
	;;
esac

# Verify that it is safe to use ZFS
if [ "${USE_ZFS}" = '1' ]
then
	for i in zfs zpool
	do
		if ! hash ${i} >/dev/null 2>&1
		then
			USE_ZFS=0
			bad_msg "Aborting use of ZFS because '${i}' not found!"
			break
		fi
	done
	unset i

	[ "${USE_ZFS}" = '1' ] && MY_HWOPTS="${MY_HWOPTS} zfs"
fi

if [ "${ROOTFSTYPE}" = "f2fs" ]
then
	# Hack for f2fs, which uses crc32 but does not depend on it (in many kernels at least):
	FIRSTMODS="${FIRSTMODS} crc32_generic"
fi

if [ "${ROOTFSTYPE}" = "btrfs" -o -x /sbin/btrfs ]
then
	# We have no mechanism to trigger btrfs module loading before UDEV's btrfs builtin
	# will run; In addition, loading btrfs via UDEV could cause problems for slow
	# machines, see https://github.com/dracutdevs/dracut/issues/658
	FIRSTMODS="${FIRSTMODS} btrfs"
fi

splash 'init'

cmdline_hwopts

# Mount devfs
mount_devfs

# Mount sysfs
mount_sysfs

if [ -e /proc/sys/kernel/hotplug ]
then
	log_msg "COMMAND: 'echo "" > /proc/sys/kernel/hotplug'"
	echo "" > /proc/sys/kernel/hotplug
fi

# Load modules listed in MY_HWOPTS if /lib/modules exists for the running kernel
if [ -z "${DO_modules}" ]
then
	good_msg 'Skipping module load; disabled via command-line'
elif [ -d "/lib/modules/${KV}" ]
then
	if [ -n "${FIRSTMODS}" ]
	then
		good_msg 'Loading first modules ...'
		# try these modules first -- detected modules for root device:
		modules_load firstmods ${FIRSTMODS}
	fi

	# Load appropriate kernel modules
	if [ "${GK_HW_USE_MODULES_LOAD}" = '1' ]
	then
		good_msg 'Loading modules ...'
		for modules in ${MY_HWOPTS}
		do
			modules_scan ${modules}
		done
	fi

	if [ -n "${MDOLIST}" ]
	then
		good_msg 'Loading modules from command-line ...'
		modules_load extra_load ${MDOLIST}
	fi
else
	good_msg 'Skipping module load; no modules in the ramdisk!'
fi

# Run debug shell if requested
run_debug_shell "before starting udevd"

# Initialize udev
if [ ! -f "/etc/udev/hwdb.bin" ]
then
	good_msg 'Generating /etc/udev/hwdb.bin ...'
	run udevadm hwdb --update \
		|| bad_msg 'Failed to generate /etc/udev/hwdb.bin!'
fi

good_msg 'Activating udev ...'

udevd_cmd="run udevd --resolve-names=never"
if [ "${GK_UDEV_DEBUG}" = '1' ]
then
	udevd_cmd="${udevd_cmd} --debug > ${GK_UDEV_LOG} 2>&1 &"
else
	udevd_cmd="${udevd_cmd} --daemon"
fi
eval "${udevd_cmd}"
if [ $? -eq 0 ]
then
	run udevadm trigger --action=add
	udevsettle
else
	bad_msg "udevd failed to run"
fi

cd /

# Start iSCSI
if hash iscsistart >/dev/null 2>&1
then
	start_iscsi
fi

# Loop file already exists on fs, assume no mount needed,
# This allows for squashfs in initrd, which can be used for (i)PXE booting
if [ -e "${LOOP}" ]
then
	got_good_root=1
	got_loop_wo_mount=1
	CDROOT_PATH=$(dirname "${LOOP}")
fi

# Apply scan delay if specified
sdelay

# Scan volumes
start_volumes

setup_keymap

if [ "${USE_SSH}" = '1' ]
then
	start_network
	start_sshd
fi

# Initialize LUKS root device except for livecd's
if [ "${CDROOT}" != '1' ]
then
	start_LUKS
	if [ "${NORESUME}" != '1' ] && [ -n "${REAL_RESUME}" ]
	then
		case "${REAL_RESUME}" in
			LABEL=*|UUID=*|PARTLABEL=*|PARTUUID=*)
				RESUME_DEV=""
				retval=1

				if [ ${retval} -ne 0 ]
				then
					RESUME_DEV=$(findfs "${REAL_RESUME}" 2>/dev/null)
					retval=$?
				fi

				if [ ${retval} -ne 0 ]
				then
					RESUME_DEV=$(blkid -o device -l -t "${REAL_RESUME}" 2>/dev/null)
					retval=$?
				fi

				if [ ${retval} -eq 0 ] && [ -n "${RESUME_DEV}" ]
				then
					good_msg "Detected real_resume=${RESUME_DEV}"
					REAL_RESUME="${RESUME_DEV}"
				fi
				;;
		esac

		do_resume
	fi
fi

run mkdir -p "${NEW_ROOT}"
CHROOT="${NEW_ROOT}"

# Run debug shell if requested
run_debug_shell "before setting up the root filesystem"

if [ "${CDROOT}" = '1' ]
then
	# Setup the root filesystem
	bootstrapFS

	if [ "${aufs}" = '1' ]
	then
		setup_aufs
		CHROOT=${aufs_union}
	elif [ "${overlayfs}" = '1' ] && [ "${got_good_root}" != '1' ]
	then
		bootstrapCD
		CHROOT=${NEW_ROOT}
	fi

	if [ "${got_good_root}" != '1' ] && [ /dev/nfs != "${REAL_ROOT}" ] && [ sgimips != "${LOOPTYPE}" ] && [ 1 != "${aufs}" ] && [ 1 != "${overlayfs}" ]
	then
		bootstrapCD
	fi

	if [ "${REAL_ROOT}" = '' ] && [ "${got_good_root}" != '1' ]
	then
		warn_msg "No bootable medium found. Waiting for new devices ..."
		COUNTER=0
		while [ ${COUNTER} -lt 3 ]
		do
			sleep 3
			let COUNTER=${COUNTER}+1
		done
		sleep 1
		bootstrapCD
	fi

	if [ "${REAL_ROOT}" = '' ] && [ "${got_good_root}" != '1' ]
	then
		# Undo stuff
		run umount  "${NEW_ROOT}/dev" 2>/dev/null
		run umount  "${NEW_ROOT}/sys" 2>/dev/null
		run umount /sys 2>/dev/null

		run umount  "${NEW_ROOT}"
		run rm -rf  "${NEW_ROOT}/*"

		bad_msg 'Could not find CD to boot, something else needed!'
		CDROOT=0
	fi
fi

# Determine root device
let ROOTDELAY_TIMEOUT=$(date +%s)+1
ROOTDELAY_TIME_WAITED=0
[ -n "${ROOTDELAY}" -a ${ROOTDELAY} -gt 0 ] && let ROOTDELAY_TIMEOUT=${ROOTDELAY_TIMEOUT}+${ROOTDELAY}-1
while true
do
	good_msg_n "Determining root device (trying ${REAL_ROOT}) ..."

	while [ "${got_good_root}" != '1' ]
	do
		# Start of sleep loop waiting on root
		while [ "${got_good_root}" != '1' -a $(date +%s) -le ${ROOTDELAY_TIMEOUT} ]
		do
			case "${REAL_ROOT}" in
				LABEL=*|UUID=*|PARTLABEL=*|PARTUUID=*)
					ROOT_DEV=""
					retval=1

					if [ ${retval} -ne 0 ]
					then
						ROOT_DEV=$(findfs "${REAL_ROOT}" 2>/dev/null)
						retval=$?
					fi

					if [ ${retval} -ne 0 ]
					then
						ROOT_DEV=$(blkid -o device -l -t "${REAL_ROOT}" 2>/dev/null)
						retval=$?
					fi

					if [ ${retval} -eq 0 ] && [ -n "${ROOT_DEV}" ]
					then
						got_good_root=1
						REAL_ROOT="${ROOT_DEV}"
						echo
						good_msg "Root device detected as ${REAL_ROOT}!"
						break
					fi
				;;
				ZFS*)
					if [ "${USE_ZFS}" = '0' ]
					then
						bad_msg "Cannot use ZFS when started without 'dozfs' kernel command-line parameter!"
						break
					fi

					ROOT_DEV="${REAL_ROOT#*=}"
					if [ "${ROOT_DEV}" != 'ZFS' ]
					then
						if [ "$(get_zfs_property "${ROOT_DEV}" type)" = 'filesystem' ]
						then
							got_good_root=1
							REAL_ROOT=${ROOT_DEV}
							ROOTFSTYPE=zfs
							echo
							good_msg "Root device detected as ${REAL_ROOT}!"
							break
						else
							bad_msg "${ROOT_DEV} is not a filesystem"
							continue
						fi
					else
						BOOTFS=$(zpool list -H -o bootfs 2>/dev/null)
						if [ "${BOOTFS}" != '-' ]
						then
							for i in ${BOOTFS}
							do
								zfs get type ${i} > /dev/null 2>&1
								if [ $? -eq 0 ]
								then
									got_good_root=1
									REAL_ROOT=${i}
									ROOTFSTYPE=zfs
									echo
									good_msg "Root device detected as ${REAL_ROOT}!"
									break
								fi
							done
						fi
					fi
				;;
				*)
					ROOT_DEV=$(readlink -f "${REAL_ROOT}")
					if [ -b "${ROOT_DEV}" ]
					then
						got_good_root=1
						REAL_ROOT=${ROOT_DEV}
						echo
						good_msg "Root device detected as ${REAL_ROOT}!"
						break
					fi
				;;
			esac
			unset ROOT_DEV

			if [ "${got_good_root}" != '1' ]
			then
				let ROOTDELAY_TIME_WAITED=${ROOTDELAY_TIME_WAITED}+1
				sleep 0.1s

				let ROOTDELAY_100MSEC_MODULO=${ROOTDELAY_TIME_WAITED}%10
				if [ ${ROOTDELAY_100MSEC_MODULO} = 0 ]
				then
					printf "."
				fi
			fi
		done  # End of sleep loop waiting on root

		if [ $(date +%s) -gt ${ROOTDELAY_TIMEOUT} ]
		then
			echo
		fi

		if [ "${USE_ZFS}" = '1' ]
		then
			write_env_file \
				"${ZFS_ENC_ENV_FILE}" \
				REAL_ROOT \
				ROOTFSTYPE
		fi

		# Check for a block device or /dev/nfs or zfs encryption
		if [ -n "${REAL_ROOT}" ] && [ "${REAL_ROOT}" = "/dev/nfs" ] || [ "${ROOTFSTYPE}" = "zfs" ] || [ -b "${REAL_ROOT}" ]
		then
			if [ "${ROOTFSTYPE}" = "zfs" ]
			then
				# at this point we determined dataset and are ready to mount
				# let's check if this dataset is encrypted and ask for passphrase
				if [ "$(zpool list -H -o feature@encryption "${REAL_ROOT%%/*}" 2>/dev/null)" = 'active' ]
				then
					ZFS_KEYSTATUS="$(get_zfs_property "${REAL_ROOT}" keystatus)"
					ZFS_ENCRYPTIONROOT="$(get_zfs_property "${REAL_ROOT}" encryptionroot)"
					if [ "${ZFS_ENCRYPTIONROOT}" != '-' ] && [ "${ZFS_KEYSTATUS}" = 'unavailable' ]
					then
						good_msg "Detected ZFS encryption, asking for key"
						run zfs load-key "${ZFS_ENCRYPTIONROOT}"

						# Get new key status to check if load-key was successful
						# or dataset has been opened by someone else in the meantime (through SSH for instance)
						ZFS_KEYSTATUS="$(get_zfs_property "${REAL_ROOT}" keystatus)"

						if [ "${ZFS_KEYSTATUS}" != 'available' ]
						then
							bad_msg "${REAL_ROOT} is encrypted and not mountable without key"
							got_good_root=0
							break
						fi

						if [ -f "${ZFS_ENC_OPENED_LOCKFILE}" ]
						then
							good_msg "${REAL_ROOT} device meanwhile was opened by someone else."
						else
							run touch "${ZFS_ENC_OPENED_LOCKFILE}"
						fi
					fi
				fi
			else
				got_good_root=1
			fi
		fi

		break
	done

	if [ "${got_good_root}" = '1' -a "${CDROOT}" = 1 -a "${REAL_ROOT}" != "/dev/nfs" ]
	then
		# CD already mounted; no further checks necessary
		break
	elif [ "${got_good_root}" = '1' -a "${LOOPTYPE}" = 'sgimips' ]
	then
		# sgimips mounts the livecd root partition directly
		# there is no isofs filesystem to worry about
		break
	elif [ "${got_good_root}" = '1' ]
	then
		good_msg "Mounting ${REAL_ROOT} as root ..."

		if [ "${ROOTFSTYPE}" = 'zfs' ]
		then
			if [ "$(get_zfs_property "${REAL_ROOT}" mountpoint)" = 'legacy' ]
			then
				MOUNT_STATE=rw
			else
				MOUNT_STATE=rw,zfsutil
			fi
		else
			MOUNT_STATE=ro
		fi

		# Try to mount the device as ${NEW_ROOT}
		if [ "${REAL_ROOT}" = '/dev/nfs' ]
		then
			findnfsmount
			mountret=$?
		else
			# If $REAL_ROOT is a symlink
			# Resolve it like util-linux mount does
			[ -L ${REAL_ROOT} ] && REAL_ROOT=$(readlink -f ${REAL_ROOT})

			# determine fs -- 'auto' will not trigger module loading!
			ROOTFSTYPE=$(determine_fs "${REAL_ROOT}" "${ROOTFSTYPE}")

			# mount ro so fsck doesn't barf later
			if [ "${REAL_ROOTFLAGS}" = '' ]
			then
				good_msg "Using mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE} ${REAL_ROOT} ${NEW_ROOT}"
				run mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE} ${REAL_ROOT} ${NEW_ROOT}
				mountret=$?
			else
				good_msg "Using mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE},${REAL_ROOTFLAGS} ${REAL_ROOT} ${NEW_ROOT}"
				run mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE},${REAL_ROOTFLAGS} ${REAL_ROOT} ${NEW_ROOT}
				mountret=$?
			fi
		fi

		# If mount is successful break out of the loop
		# else not a good root and start over.
		if [ "${mountret}" = '0' ]
		then
			# Make sure that entries from $NEWROOT/etc/initramfs.mounts
			# are mounted before validating $REAL_INIT in case init isn't
			# located on $REAL_ROOT.
			process_initramfs_mounts

			init_binary_file="${NEW_ROOT}${REAL_INIT:-/sbin/init}"
			init_binary_fallback_file="${NEW_ROOT}/bin/sh"

			if [ -f "${init_binary_file}" -a -x "${init_binary_file}" ]
			then
				break
			else
				warn_msg "'${init_binary_file}' was not found, is not a file or is not executable, maybe a symlink?"
			fi

			if [ -L "${init_binary_file}" ]
			then
				good_msg "Symlink detected! Assuming split /usr ..."
				break
			else
				warn_msg "'${init_binary_file}' is not a symlink, do we have at least /bin/sh?"
			fi

			if [ -f "${init_binary_fallback_file}" -a -x "${init_binary_fallback_file}" ]
			then
				REAL_INIT="${init_binary_fallback_file/${NEW_ROOT}}"
				good_msg "Executable fallback file '${init_binary_fallback_file}' detected!"
				break
			else
				warn_msg "'${init_binary_fallback_file}' was not found, is not a file or is not executable, maybe we are working with NFS?"
			fi

			if [ "${REAL_ROOT}" = "/dev/nfs" ]
			then
				good_msg "NFS detected!"
				break
			else
				warn_msg "No NFS detected!"
			fi

			bad_msg "The filesystem mounted at ${REAL_ROOT} does not appear to be a valid /:"
			bad_msg "Neither executable file '${init_binary_file}' nor '${init_binary_fallback_file}' was found."
			bad_msg "If correct root device was specified, check 'root' or 'init' kernel command-line parameter!"
			got_good_root=0
		else
			bad_msg "Could not mount specified ROOT!"
			got_good_root=0
		fi
	fi

	if [ "${got_good_root}" = '0' ]
	then
		if mountpoint "${NEW_ROOT}" 1>/dev/null 2>&1
		then
			run umount "${NEW_ROOT}" 1>/dev/null 2>&1
			if [ $? -ne 0 ]
			then
				echo
				bad_msg "Failed to umount ${REAL_ROOT} which was mounted as ${NEW_ROOT}!"
				warn_msg "You probably need to open a shell and restore mountpoint before you are able to mount another device as ${NEW_ROOT}."
				echo
			fi
		fi

		bad_msg "Block device ${REAL_ROOT} is not a valid root device ..."
		prompt_user "REAL_ROOT" "root block device"
		ROOTDELAY_TIME_WAITED=0
		let ROOTDELAY_TIMEOUT=$(date +%s)+1
	fi
done
# End determine root device

# If CD root is set determine the looptype to boot
if [ "${CDROOT}" = '1' ]
then
	good_msg 'Determining looptype ...'
	cd "${NEW_ROOT}"

	# Find loop and looptype
	[ -z "${LOOP}" ] && find_loop
	[ -z "${LOOPTYPE}" ] && find_looptype

	cache_cd_contents

	# If encrypted, find key and mount, otherwise mount as usual
	if [ -n "${CRYPT_ROOT}" ]
	then
		CRYPT_ROOT_KEY="$(head -n 1 "${CDROOT_PATH}"/${CDROOT_MARKER})"
		CRYPT_ROOT='/dev/loop0'
		good_msg 'You booted an encrypted livecd' "${CRYPT_SILENT}"

		losetup /dev/loop0 "${CDROOT_PATH}/${LOOPEXT}${LOOP}"
		test_success 'Preparing loop filesystem'

		start_LUKS

		case ${LOOPTYPE} in
			normal)
				MOUNTTYPE="ext2"
				;;
			*)
				MOUNTTYPE=$(determine_fs "/dev/mapper/root" "${MOUNTTYPE}")
				;;
		esac
		run mount -t "${MOUNTTYPE}" -o ro /dev/mapper/root "${NEW_ROOT}/mnt/livecd"
		test_success 'Mount filesystem'
		FS_LOCATION='mnt/livecd'
	# Setup the loopback mounts, if unencrypted
	else # if [ -n "${CRYPT_ROOT}" ]
		if [ "${LOOPTYPE}" = 'normal' ]
		then
			good_msg 'Mounting loop filesystem'
			run mount -t ext2 -o loop,ro "${CDROOT_PATH}/${LOOPEXT}${LOOP}" "${NEW_ROOT}/mnt/livecd"
			test_success 'Mount filesystem'
			FS_LOCATION='mnt/livecd'
		elif [ "${LOOPTYPE}" = 'squashfs' ]
		then
			good_msg 'Mounting squashfs filesystem'

			if [ "${aufs}" = '1' ]
			then
				setup_squashfs_aufs
				test_success 'Mount aufs filesystem'
			elif [ "${overlayfs}" = '1' ]
			then
				setup_overlayfs
				test_success 'Mount overlayfs filesystem'
			else
				_CACHED_SQUASHFS_PATH="${NEW_ROOT}/mnt/${LOOP}"
				_squashfs_path="${CDROOT_PATH}/${LOOPEXT}${LOOP}"  # Default to uncached
				# Upgrade to cached version if possible
				[ "${DO_cache}" -a -f "${_CACHED_SQUASHFS_PATH}" ] \
					&& _squashfs_path=${_CACHED_SQUASHFS_PATH}
				mount -t squashfs -o loop,ro "${_squashfs_path}" "${NEW_ROOT}/mnt/livecd" || {
					bad_msg "Squashfs filesystem could not be mounted, dropping into shell."
					if [ -e /proc/filesystems ]
					then
						grep -Fq squashfs /proc/filesystems || \
							bad_msg "HINT: Your kernel does not know filesystem \"squashfs\"."
					fi
					run_emergency_shell
				}
			fi

			FS_LOCATION='mnt/livecd'
		elif [ "${LOOPTYPE}" = 'gcloop' ]
		then
			good_msg 'Mounting gcloop filesystem'
			echo ' ' | losetup -E 19 -e ucl-0 -p0 "${NEW_ROOT}/dev/loop0" "${CDROOT_PATH}/${LOOPEXT}${LOOP}"
			test_success 'losetup the loop device'

			run mount -t ext2 -o ro "${NEW_ROOT}/dev/loop0" "${NEW_ROOT}/mnt/livecd"
			test_success 'Mount the losetup loop device'
			FS_LOCATION='mnt/livecd'
		elif [ "${LOOPTYPE}" = 'zisofs' ]
		then
			FS_LOCATION="${CDROOT_PATH/\/}/${LOOPEXT}${LOOP}"
		elif [ "${LOOPTYPE}" = 'noloop' ]
		then
			FS_LOCATION="${CDROOT_PATH/\/}"
		elif [ "${LOOPTYPE}" = 'sgimips' ]
		then
			# getdvhoff finds the starting offset (in bytes) of the squashfs
			# partition on the cdrom and returns this offset for losetup
			#
			# All currently supported SGI Systems use SCSI CD-ROMs, so
			# so we know that the CD-ROM is usually going to be /dev/sr0.
			#
			# We use the value given to losetup to set /dev/loop0 to point
			# to the liveCD root partition, and then mount /dev/loop0 as
			# the LiveCD rootfs
			good_msg 'Locating the SGI LiveCD Root Partition'
			echo ' ' | \
				losetup -o $(getdvhoff "${NEW_ROOT}${REAL_ROOT}" 0) \
					"${NEW_ROOT}${CDROOT_DEV}" \
					"${NEW_ROOT}${REAL_ROOT}"
			test_success 'losetup /dev/sr0 /dev/loop0'

			good_msg 'Mounting the Root Partition'
			run mount -t squashfs -o ro "${NEW_ROOT}${CDROOT_DEV}" "${NEW_ROOT}/mnt/livecd"
			test_success 'mount /dev/loop0 /'
			FS_LOCATION='mnt/livecd'
		fi
	fi # if [ -n "${CRYPT_ROOT}" ]

	if [ "${aufs}" = '1' ]
	then
		aufs_insert_dir "${CHROOT}" "${aufs_ro_branch}"

		# Function to handle the RC_NO_UMOUNTS variable in $CHROOT/etc/rc.conf
		conf_rc_no_umounts

		# Fstab changes for aufs
		if ! grep -q '^aufs' "${CHROOT}/etc/fstab" 2>/dev/null
		then
			for dir in /var/tmp /tmp
			do
				[ ! -d ${CHROOT}${dir} ] && run mkdir -p "${CHROOT}${dir}"
			done

			cat > "${CHROOT}/etc/fstab" << FSTAB
####################################################
## ATTENTION: THIS IS THE FSTAB ON THE LIVECD     ##
## PLEASE EDIT THE FSTAB at /mnt/gentoo/etc/fstab ##
####################################################
aufs            /                               aufs    defaults        0 0
vartmp          /var/tmp                        tmpfs   defaults        0 0
tmp             /tmp                            tmpfs   defaults        0 0
FSTAB
		fi

		# Check modules support
		is_union_modules aufs

		# Create the directories for our new union mounts
		[ ! -d ${CHROOT}${NEW_ROOT} ] && mkdir -p "${CHROOT}${NEW_ROOT}"

		# Check to see if we successfully mounted $aufs_dev
		if [ -n "${aufs_dev}" ] && grep ${aufs_dev} /etc/mtab 1>/dev/null
		then
			[ ! -d ${CHROOT}${aufs_dev_mnt} ] && run mkdir -p "${CHROOT}${aufs_dev_mnt}"
			run mount --move "${aufs_dev_mnt}" "${CHROOT}${aufs_dev_mnt}"
		fi
	fi

	# Unpacking additional packages from NFS mount, or root (if squashfs was found there)
	# This is useful for adding kernel modules to /lib
	# We do this now, so that additional packages can add whereever they want.
	if [ "${REAL_ROOT}" = '/dev/nfs' ] || [ "${got_loop_wo_mount}" = '1' ]
	then
		if [ -e "${CDROOT_PATH}/add" ]
		then
				# shellcheck disable=SC2045
				for targz in $(ls ${CDROOT_PATH}/add/*.tar.gz)
				do
					tarname=$(basename ${targz})
					good_msg "Adding additional package ${tarname}"
					(cd ${NEW_ROOT} ; tar -xf ${targz})
				done
		fi
	fi

	if [ "${USE_UNIONFS_NORMAL}" = '1' ]
	then
		setup_unionfs ${NEW_ROOT} /${FS_LOCATION}
		CHROOT=/union
	elif [ "${aufs}" != '1'  ] && [ "${overlayfs}" != '1' ]
	then
		good_msg "Copying read-write image contents to tmpfs"

		# Copy over stuff that should be writable
		(
			cd "${NEW_ROOT}/${FS_LOCATION}"
			cp -a ${ROOT_TREES} "${NEW_ROOT}"
		) ||
		{
			bad_msg "Copying failed, dropping into a shell."
			run_emergency_shell
		}

		# Now we do the links.
		for x in ${ROOT_LINKS}
		do
			if [ -L "${NEW_ROOT}/${FS_LOCATION}/${x}" ]
			then
				ln -s "$(readlink ${NEW_ROOT}/${FS_LOCATION}/${x})" "${x}" 2>/dev/null
			else
				# List all subdirectories of x
				find "${NEW_ROOT}/${FS_LOCATION}/${x}" -type d 2>/dev/null |
				while read directory
				do
					# Strip the prefix of the FS_LOCATION
					directory="${directory#${NEW_ROOT}/${FS_LOCATION}/}"

					# Skip this directory if we already linked a parent directory
					if [ "${current_parent}" != '' ]
					then
						var=$(echo "${directory}" | grep "^${current_parent}")
						if [ "${var}" != '' ]
						then
							continue
						fi
					fi

					# Test if the directory exists already
					if [ -e "/${NEW_ROOT}/${directory}" ]
					then
						# It does exist, link all the individual files
						# shellcheck disable=SC2045
						for file in $(ls /${NEW_ROOT}/${FS_LOCATION}/${directory})
						do
							if [ ! -d "/${NEW_ROOT}/${FS_LOCATION}/${directory}/${file}" ] && [ ! -e "${NEW_ROOT}/${directory}/${file}" ]
							then
								ln -s "/${FS_LOCATION}/${directory}/${file}" "${directory}/${file}" 2> /dev/null
							fi
						done
					else
						# It does not exist, make a link to the livecd
						ln -s "/${FS_LOCATION}/${directory}" "${directory}" 2>/dev/null
						current_parent="${directory}"
					fi
				done
			fi
		done

		mkdir -p initramfs proc tmp run sys 2>/dev/null
		chmod 1777 tmp
	fi

	# Have handy /mnt/cdrom (CDROOT_PATH) as well
	if [ "${aufs}" = '1' ]
	then
		[ ! -d "${CHROOT}${CDROOT_PATH}" ] && mkdir "${CHROOT}${CDROOT_PATH}"
		run mount --move "${CDROOT_PATH}" "${CHROOT}${CDROOT_PATH}"
	else
		[ ! -d "${NEW_ROOT}${CDROOT_PATH}" ] && mkdir -p "${NEW_ROOT}${CDROOT_PATH}"
		run mount --move "${CDROOT_PATH}" "${NEW_ROOT}${CDROOT_PATH}"
	fi

	# Let Init scripts know that we booted from CD
	export CDBOOT
	CDBOOT=1
else
	if [ "${USE_UNIONFS_NORMAL}" = '1' ]
	then
		run mkdir /union_changes
		run mount -t tmpfs tmpfs /union_changes
		setup_unionfs /union_changes ${NEW_ROOT}
		run mkdir -p ${UNION}/tmp/.initrd
	elif [ "${aufs}" = '1' ]
	then
		aufs_insert_dir "${aufs_union}" "${NEW_ROOT}"
		run mkdir -p "${aufs_union}/tmp/.initrd"
	fi
fi # if [ "${CDROOT}" = '1' ]

# Re-run to ensure $NEWROOT/etc/initramfs.mounts was processed at least once
process_initramfs_mounts

# Execute script on the cdrom just before boot to update things if necessary
cdupdate

if [ "${SUBDIR}" != '' -a -e "${CHROOT}/${SUBDIR}" ]
then
	good_msg "Entering ${SUBDIR} to boot"
	CHROOT="${CHROOT}/${SUBDIR}"
fi

verbose_kmsg

if [ "${aufs}" = '1' ]
then
	aufs_union_memory=${CHROOT}/.unions/memory

	run mkdir -p "${aufs_union_memory}"
	run mount --move "${aufs_memory}" "${aufs_union_memory}"
	test_success "Failed to move aufs ${aufs_memory} into the system root"

	for dir in /mnt/gentoo ${aufs_rw_branch} ${aufs_ro_branch}
	do
		run mkdir -p "${CHROOT}${dir}"
		run chmod 755 "${CHROOT}${dir}"
	done

	for mount in ${aufs_rw_branch} ${aufs_ro_branch}
	do
		run mount --move "${mount}" "${CHROOT}${mount}"
	done
fi

# Copy user keymap generated file if available
copyKeymap

# Setup any user defined environment locales for desktop usage
setup_locale

if [ "${USE_SSH}" = '1' ]
then
	wait_sshd
fi

cleanup

udevsettle
run udevadm control --exit
if pgrep udevd >/dev/null 2>&1
then
	warn_msg "udevd is still running -- Trying to kill it ..."
	run pkill -9 udevd >/dev/null 2>&1
fi

# Run debug shell if requested
run_debug_shell "before switch_root"

if [ "${GK_PRESERVE_RUN}" = '0' ]
then
	GK_INIT_LOG=
	run umount /run
fi

# init_opts is set in the environment by the kernel when it parses the command line
init=${REAL_INIT:-/sbin/init}

while true
do
	# switch_root can only be called from PID 1;
	# So stay in loop as long as user is able
	# to fix the problem.

	if  ! mountpoint "${CHROOT}" 1>/dev/null 2>&1
	then
		bad_msg "${CHROOT} is not a mountpoint; Was root device (${REAL_ROOT}) not mounted?"
	elif ! chroot "${CHROOT}" test -x /${init#/} 1>/dev/null 2>&1
	then
		mounted_root_device=$(mountpoint -n /newroot 2>/dev/null | awk '{ print $1 }')
		bad_msg "init (${init}) not found in mounted root device (${mounted_root_device})!"
	else
		break
	fi

	run_emergency_shell
	if ! is_userinteraction_allowed
	then
		${GK_EMERGENCY_ACTION} || exit 1
	fi
done

good_msg "Switching to real root: switch_root ${CHROOT} ${init} ${init_opts}"
exec switch_root "${CHROOT}" "${init}" ${init_opts}

# If we reached here, something went very badly wrong in the initramfs.
# However, spawning a rescue shell at this point would not help anymore:
#   1) We have to assume that switch_root has already messed with
#      initramfs (i.e. we probably have no /dev anymore).
#   2) Any shell we would spawn would become child of PID 1 which would
#      prevent user from calling switch_root once the user believes the
#      problem was fixed.
${GK_EMERGENCY_ACTION} || exit 1