# Local filesystem mounting			-*- shell-script -*-

pre_mountroot()
{
	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-top"
	run_scripts /scripts/local-top
	[ "$quiet" != "y" ] && log_end_msg

	# Don't wait for a root device that doesn't have a corresponding
	# device in /dev (ie, mtd0)
	if [ "${ROOT#/dev}" = "${ROOT}" ]; then
		return
	fi

	while [ -z "${FSTYPE}" ]; do
		FSTYPE=$(wait-for-root "${ROOT}" ${ROOTDELAY:-30})

		# Load ubi with the correct MTD partition and return since
		# fstype doesn't work with a char device like ubi.
		if [ -n "$UBIMTD" ]; then
			modprobe ubi mtd=$UBIMTD
			return
		fi

		# Run failure hooks, hoping one of them can fix up the system
		# and we can restart the wait loop.  If they all fail, abort
		# and move on to the panic handler and shell.
		if [ -z "${FSTYPE}" ] && ! try_failure_hooks; then
			break
		fi
	done

	# We've given up, but we'll let the user fix matters if they can
	while [ -z "${FSTYPE}" -a ! -e "${ROOT}" ]; do
		# give hint about renamed root
		case "${ROOT}" in
		/dev/hd*)
			suffix="${ROOT#/dev/hd}"
			major="${suffix%[[:digit:]]}"
			major="${major%[[:digit:]]}"
			if [ -d "/sys/block/sd${major}" ]; then
				echo "WARNING bootdevice may be renamed. Try root=/dev/sd${suffix}"
			fi
			;;
		/dev/sd*)
			suffix="${ROOT#/dev/sd}"
			major="${suffix%[[:digit:]]}"
			major="${major%[[:digit:]]}"
			if [ -d "/sys/block/hd${major}" ]; then
				echo "WARNING bootdevice may be renamed. Try root=/dev/hd${suffix}"
			fi
			;;
		esac
		echo "Gave up waiting for root device.  Common problems:"
		echo " - Boot args (cat /proc/cmdline)"
		echo "   - Check rootdelay= (did the system wait long enough?)"
		echo "   - Check root= (did the system wait for the right device?)"
		echo " - Missing modules (cat /proc/modules; ls /dev)"
		panic "ALERT!  ${ROOT} does not exist.  Dropping to a shell!"
	done
}

mountroot()
{
	pre_mountroot

	# Get the root filesystem type if not set
	if [ -z "${ROOTFSTYPE}" ]; then
		[ -n "${FSTYPE}" ] || FSTYPE=$(blkid -s TYPE -o value "${ROOT}")
		ROOTFSTYPE="${FSTYPE}"
	else
		FSTYPE=${ROOTFSTYPE}
	fi

	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-premount"
	run_scripts /scripts/local-premount
	[ "$quiet" != "y" ] && log_end_msg

	if [ "${readonly}" = "y" ] && \
	   [ -z "$LOOP" ]; then
		roflag=-r
	else
		roflag=-w
	fi

	# FIXME This has no error checking
	[ -n "${FSTYPE}" ] && modprobe ${FSTYPE}

	# FIXME This has no error checking
	# Mount root
	mount ${roflag} ${FSTYPE:+-t ${FSTYPE} }${ROOTFLAGS} ${ROOT} ${rootmnt}
	mountroot_status="$?"
	if [ "$LOOP" ]; then
		if [ "$mountroot_status" != 0 ]; then
			if [ ${FSTYPE} = ntfs ] || [ ${FSTYPE} = vfat ]; then
				panic "
Could not mount the partition ${ROOT}.
This could also happen if the file system is not clean because of an operating
system crash, an interrupted boot process, an improper shutdown, or unplugging
of a removable device without first unmounting or ejecting it.  To fix this,
simply reboot into Windows, let it fully start, log in, run 'chkdsk /r', then
gracefully shut down and reboot back into Windows. After this you should be
able to reboot again and resume the installation.
(filesystem = ${FSTYPE}, error code = $mountroot_status)
"
			fi
		fi
	
		mkdir -p /host
		mount -o move ${rootmnt} /host

		while [ ! -e "/host/${LOOP#/}" ]; do
			panic "ALERT!  /host/${LOOP#/} does not exist.  Dropping to a shell!"
		done

		# Get the loop filesystem type if not set
		if [ -z "${LOOPFSTYPE}" ]; then
			eval $(fstype < "/host/${LOOP#/}")
		else
			FSTYPE="${LOOPFSTYPE}"
		fi
		if [ "$FSTYPE" = "unknown" ] && [ -x /sbin/blkid ]; then
			FSTYPE=$(/sbin/blkid -s TYPE -o value "/host/${LOOP#/}")
			[ -z "$FSTYPE" ] && FSTYPE="unknown"
		fi

		if [ ${readonly} = y ]; then
			roflag=-r
		else
			roflag=-w
		fi

		# FIXME This has no error checking
		modprobe loop
		modprobe ${FSTYPE}

		# FIXME This has no error checking
		mount ${roflag} -o loop -t ${FSTYPE} ${LOOPFLAGS} "/host/${LOOP#/}" ${rootmnt}

		if [ -d ${rootmnt}/host ]; then
			mount -o move /host ${rootmnt}/host
		fi
	elif [ "$ROOTSUBDIR" ]; then
		if [ "$mountroot_status" != 0 ]; then
			panic "
Could not mount the partition ${ROOT}.
This could also happen if the file system is not clean because of an operating
system crash, an interrupted boot process, an improper shutdown, or unplugging
of a removable device without first unmounting or ejecting it.
(filesystem = ${FSTYPE}, error code = $mountroot_status)
"
		fi

		mkdir -p /host
		mount -o move ${rootmnt} /host
		
		if [ ! -d "/host/$ROOTSUBDIR" ]; then
		    panic "Failed to bind folder ${ROOTSUBDIR} as root: folder does not exist."
		fi
		
		mount -o bind /host/$ROOTSUBDIR ${rootmnt}
		if [ -d ${rootmnt}/host ]; then
			mount -o move /host ${rootmnt}/host
		fi
	fi

	[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-bottom"
	run_scripts /scripts/local-bottom
	[ "$quiet" != "y" ] && log_end_msg
}
