my modified init script

init (text/plain), 26.94 KB, created by Diego Jacobi on 2007-03-18 03:32:28 UTC

#!/bin/sh
# Copyright 2003-2006 Gentoo Foundation 
# Distributed under the terms of the GNU General Public License v2
# Modified by Jacobi Diego 2007

. /etc/initrd.defaults
. /etc/initrd.scripts.epsilon

# genkernel is a beautyful tool, but the init on the initramfs, lack of a lot of features
# There are a lot of ways to boot a linux system
# gentooinit supports:
#     boot an installed distro in a harddisk
#     boot a simple livecd without the needing of unionfs
#     boot a simple livecd with unionfs (very incomplete but works)
#     boot a livecd across an specified nfs server
#     boot a livecd from a pendrive
#     save changes on a $CHANGESDEV which should be an autodetectable mount type
#          (very VERY incomplete, files are left in this device without order)
#          (i will certainly never use my precious pendrive with any gentoo livecd)

# but there are really a lot of features currently supported for other distros
# and a lot of features that can be made. I did a few modifications for my livecd to work.
# i decide to make my livecd a litle complex, becouse i dont like the idea of wasting a lot of space
# i didnt end my livecd, but i know that my modifications works:

# ================= my init =====================

# Added support for:
#     boot complex livecds with multiple union branche's (like a slax)
#          a branch can be any supported medium (squashfs, "normal" or ext2fs loop, gcloop, zisofs, etc.)
#          example: loop=/stage.squashfs,/distro.squashfs,/gnome.squashfs looptype=squashfs,squashfs,squashfs
#                   this will build a unionfs'd system combinning all branches
#                   then, the user can deside to only install stage3 on harddisk,
#                   stage+distro without gnome or the complete livecd
#     easiest keymap setup on boot with keymap=es or dokeymap=es, (a grub menu can make this easier to setup)
# Improved unionfs utilization:
#     when working with unionfs is not needed to add /new_root as a new branch,
#           you make 3 branches just to boot a single livecd: (memory,livecd,new_root)
#           but all mountable device can be mounted over $UNION and so, NEW_ROOT=$UNION
#           then we are using 2 branches to boot a single livecd: (memory, livecd)

# ================= TODO list =====================

# TODO, save livecd changes in a pendrive or harddisk inside a ext2fs loop file,
#              step 1:  mount usb device on USBDIR
#              step 2:  check for file $USBDIR$SAVECHANGES or $USBDIR$SAVECHANGES.distroname.loop,
#                       mount it as MEMORY
#              step 3:  if doesnt exists, create an ext2fs loop file as $USBDIR$SAVECHANGES.distroname.loop
#              step 4:  run setup_unionfs and in there, check for an already 
#                       mounted MEMORY. Make and add it to union
# TODO, $MEMORY/unionfs_changes/$UID , just make sence on no-unionfs livecds,
#              remove it? can also be reemplaced with the earlier TODO

# TODO, Paths in a specified device:
#              (/dev/hda5)/home/diego/livecd.squashfs
#                         this will add support to boot a livecd from a harddisk
#                         and also making possible to save changes to a harddisk
#              (nfs:192.168.15.23)/adistroname/livecd.squashfs
#                         support to boot complex livecd's from nfs, or just a part,
#                         like just one branch kde.squashfs

# TODO, Paths in an un-specified device:
#              (pendrive)/adistroname/livecd.squashfs
#              (cdrom)/adistroname/livecd.squashfs
#              (nfs)/adistroname/livecd.squashfs
#                         pendrive, cdrom and nfs are flagwords, meaning that we should
#                         try to autodetect the correct device, for nfs
#                         we can autocheck for standard ip's, 192.168.0.1, 192.168.1.1, etc.
#                         if it is slow, is an user fault, becouse he/she does not have specified the device

# TODO, un no-unionfs livecd requiere montar una lista de directorios en un dispositivo de escritura
#              dicha lista debe ser especificada en un archivo o como parametro al bootear
#              Por ejemplo: kernel... writable=/home,/var,/whatever,... savechanges=(pendrive)/diego/whatever ...
#              Vale la pena? no creo que sea muy difisil, pero hay cosas mas importantes

# TODO, bootear un linux congelado. Para un linux instalado en un disco rigido y booteado con real_root=...
#              puede hacerse otra opción adicional, "freeze" o 
#              "freeze=(/dev/hdb2)/something/freezed.real_root.loop" (para no ocupar memoria)
#               otra opción puede existir para no borrar automaticamente el archivo "no-delfreeze"
#              step 1: borrar si existe y crear el freeze.loop, montarlo
#              step 2: crar el unionfs, agregar el freezeloop, agregar el real_root
# TODO, hay demasiadas rutinas para detectar errores en los parámetros de entrada
#              y poca documentación online sobre las multiples formas de configuración.
#              Un sistema bien configurado no tiene porque perder el tiempo con
#              rutinas de detección de errores. Además, quien hace configura mal un sistema,
#              por mas rutinas que se hagan, no van a corregir los errores del usuario.
#              Eliminar rutinas de detección de error y mejorar documentación.
# TODO, verdadera detección de hardware. Cargar "todo" como lo hace actualmente
#              gentoo debería ser un fallback.
#              Igualmente, el método actual funciona. Asi que esto es menos prioritario.
# TODO, ejemplos de configuracion del grub, isolinux, etc., para cada caso posible de booteo.
# TODO, un nuevo initramfs, para operaciones de livecd adicionales:
#              El nuevo initramfs puede contener fdisk, mkfs.ext2, mkfs.(...), etc
#                   no necesita completa autodetección de hardware
#              Un script para instalación (copia) de los livecd's al disco.
#                   Que implemente una herramienta de abstracción como "dialog"
#                   Crear un shdialog utilizando "read y echo" mas los colores, y borrado de pantalla
#              Un script para la creación de floopys para bootear, con la 
#                   imagen obtenida desde el cdrom, sin necesidad de cargar un SO, ni drivers
#              Un script para volcar el livecd a un pendrive y hacerlo booteable si entra.
# TODO, agregar todas las opciones adicionales de booteo de SuperGrubDisk
# TODO, agregar language=es location=Amer-/Arg-/Bue- kernel parameter on boot
#              where - could be autocompletion, to not write too much on the init
#              language, determinning the just a export BOOTLANGUAGE=$language
#                   the init should be always in english
# TODO, make a grub interface to automatically set highly-variable-kernel-parameters
#              with menues for livecds
#              like, keymap=..., language=..., location=..., etc.


splash() {
	return 0
}

[ -e /etc/initrd.splash ] && . /etc/initrd.splash

# Clean input/output
exec >${CONSOLE} <${CONSOLE} 2>&1

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 proc /proc >/dev/null 2>&1
mount -o remount,rw / >/dev/null 2>&1

# Set up symlinks
if [ "$0" = '/init' ]
then
	/bin/busybox --install -s

	[ -e /linuxrc ] && rm /linuxrc
	 
	if [ -e /bin/lvm ]
	then
		ln -s /bin/lvm /bin/vgscan
		ln -s /bin/lvm /bin/vgchange
	fi
fi

# Mostrar menos logs del kernel si [ -n QUIET ]
quiet_kmsg

CMDLINE="`cat /proc/cmdline`"
# Scan CMDLINE for any specified real_root= or cdroot arguments
REAL_ROOT=''
FAKE_ROOT=''
REAL_ROOTFLAGS=''
for x in ${CMDLINE}
do
	case "${x}" in
		real_root\=*)
			REAL_ROOT=`parse_opt "${x}"`
		;;
		root\=*)
			FAKE_ROOT=`parse_opt "${x}"`
		;;
		subdir\=*)
			SUBDIR=`parse_opt "${x}"`
		;;
		real_init\=*)
			REAL_INIT=`parse_opt "${x}"`
		;;
		init_opts\=*)
			INIT_OPTS=`parse_opt "${x}"`
		;;
		# Livecd options
		cdroot)
			CDROOT=1
		;;
		cdroot\=*)
			CDROOT=1
			CDROOT_DEV=`parse_opt "${x}"`
		;;
		# Start livecd loop and looptype options
		loop\=*)
			LOOP=`parse_opt "${x}"`
		;;
		looptype\=*)
			LOOPTYPE=`parse_opt "${x}"`
		;;
		# Start Device Manager options 
		devfs)
			USE_DEVFS_NORMAL=1
			USE_UDEV_NORMAL=0
		;;
		udev)
			USE_DEVFS_NORMAL=0
			USE_UDEV_NORMAL=1
		;;
		unionfs)
			if [ ! -x /sbin/unionctl ]
			then
				USE_UNIONFS_NORMAL=0
				bad_msg 'Unionctl not found: aborting use of unionfs!'
			else
				USE_UNIONFS_NORMAL=1
			fi
		;;
		unionfs\=*)
			if [ ! -x /sbin/unionctl ]
			then
				USE_UNIONFS_NORMAL=0
				bad_msg 'Unionctl not found: aborting use of unionfs!'
			else
				USE_UNIONFS_NORMAL=1
				CMD_UNIONFS=`parse_opt "${x}"`
				echo ${CMD_UNIONFS}|grep , >/dev/null 2>&1
				if [ "$?" -eq '0' ]
				then
					UID=`echo ${CMD_UNIONFS#*,}`
					UNIONFS=`echo ${CMD_UNIONFS%,*}`
				else
					UNIONFS=${CMD_UNIONFS}
				fi
			fi
		;;
		# Start Volume manager options 
		dolvm2)
			USE_LVM2_NORMAL=1
		;;
		dodmraid)
			USE_DMRAID_NORMAL=1
		;;
		dodmraid\=*)
			DMRAID_OPTS=`parse_opt "${x}"`
			USE_DMRAID_NORMAL=1
		;;
		doevms2)
			USE_EVMS2_NORMAL=1
		;;
		# Debug Options
		debug)
			DEBUG='yes'
		;;
		 # Scan delay options 
		scandelay\=*)
			SDELAY=`parse_opt "${x}"`
		;;
		scandelay)
			SDELAY=10
		;;
		# Module no-loads
		doload\=*)
			MDOLIST=`parse_opt "${x}"`
			MDOLIST="`echo ${MDOLIST} | sed -e \"s/,/ /g\"`"
		;;
		nodetect)
			NODETECT=1
		;;
		noload\=*)
			MLIST=`parse_opt "${x}"`
			MLIST="`echo ${MLIST} | sed -e \"s/,/ /g\"`"
			export MLIST
		;;
		# Redirect output to a specific tty
		CONSOLE\=*)
			CONSOLE=`parse_opt "${x}"`
			exec >${CONSOLE} <${CONSOLE} 2>&1
		;;
		# /dev/md
		lvmraid\=*)
			RAID_DEVICES="`parse_opt ${x}`"
			RAID_DEVICES="`echo ${RAID_DEVICES} | sed -e 's/,/ /g'`"
		;;
		part\=*)
			MDPART=`parse_opt "${x}"`
		;;
		# NFS
		ip\=*)
			IP=`parse_opt "${x}"`
		;;
		nfsroot\=*)
			NFSROOT=`parse_opt "${x}"`
		;;
		crypt_root\=*)
			LUKS_ROOT=`parse_opt "${x}"`
		;;
		crypt_swap\=*)
			LUKS_SWAP=`parse_opt "${x}"`
		;;
		real_rootflags\=*)
			REAL_ROOTFLAGS=`parse_opt "${x}"`
		;;
		dokeymap\=*)
			USE_KEYMAP=`parse_opt "${x}"`
		;;
		keymap\=*)
			USE_KEYMAP=`parse_opt "${x}"`
		;;
	esac
done

if [ -z "${REAL_ROOT}" -a \( "${CDROOT}" -eq 0 \)  -a \( "${FAKE_ROOT}" != "/dev/ram0" \) ]
then
	REAL_ROOT="${FAKE_ROOT}"	
fi

splash 'init'

detect_sbp2_devices

# Scan CMDLINE for any "doscsi" or "noscsi"-type arguments
cmdline_hwopts

# Load modules listed in MY_HWOPTS if /lib/modules exists
if [ -d '/lib/modules' ]
then
	good_msg 'Loading modules'
	# Load appropriate kernel modules
	if [ "${NODETECT}" -ne '1' ]
	then
		for modules in $MY_HWOPTS
		do
			modules_scan $modules
			eval DO_`echo $modules | sed 's/-//'`=1
		done
	fi
	# Always eval doload=...
	modules_load $MDOLIST
else
	for modules in $MY_HWOPTS
	do
		eval DO_`echo $modules | sed 's/-//'`=1
	done
	good_msg 'Skipping module load; no modules in the initrd!'
fi

# Mount sysfs
mount_sysfs

# Delay if needed for USB hardware
sdelay

# Start udev/devfs
start_dev_mgr

# Setup md device nodes if they dont exist
setup_md_device

# Scan volumes
startVolumes

# Initialize LUKS root device
startLUKS

# Set up unionfs
mkdir -p ${NEW_ROOT}
setup_unionfs
if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
then
	CHROOT=${UNION}
	NEW_ROOT=${UNION}
else
	CHROOT=${NEW_ROOT}
fi
# Run debug shell if requested
rundebugshell

suspend_resume
suspend2_resume

if [ "${CDROOT}" -eq '1' ]
then
	if [ ! "${USE_UNIONFS_NORMAL}" -eq '1' ]
	then
		good_msg "Making tmpfs for ${NEW_ROOT}"
		mount -t tmpfs tmpfs ${NEW_ROOT}
	fi
	
	for i in dev mnt mnt/cdrom mnt/livecd tmp tmp/.initrd mnt/gentoo sys
	do
		mkdir -p ${NEW_ROOT}/$i
		chmod 755 ${NEW_ROOT}/$i
	done
	[ ! -e ${NEW_ROOT}/dev/null ] && mknod ${NEW_ROOT}/dev/null c 1 3
	[ ! -e ${NEW_ROOT}/dev/console ] && mknod ${NEW_ROOT}/dev/console c 5 1

	# For SGI LiveCDs ...
	if [ "${LOOPTYPE}" = "sgimips" ]
	then
		[ ! -e ${NEW_ROOT}/dev/sr0 ] && mknod ${NEW_ROOT}/dev/sr0 b 11 0
		[ ! -e ${NEW_ROOT}/dev/loop0 ] && mknod ${NEW_ROOT}/dev/loop0 b 7 0
	fi

	# Required for gensplash to work.  Not an issue with the initrd as this
	# device isnt created there and is not needed.
	if [ -e /dev/tty1 ]
	then
		[ ! -e ${NEW_ROOT}/dev/tty1 ] && mknod ${NEW_ROOT}/dev/tty1 c 4 1
	fi


	if [ "${REAL_ROOT}" != "/dev/nfs" ] && [ "${LOOPTYPE}" != "sgimips" ]
	then
	  # Locate the cdrom device with our media on it. mounting all possible media
		bootstrapCD
	fi

	if [ "${REAL_ROOT}" = '' ]
	then
		echo -n -e "${WARN}>>${NORMAL}${BOLD} No bootable medium found. Waiting for new devices"
		
		COUNTER=0
		while [ $COUNTER -lt 3 ]; do
			sleep 3
			echo -n '.'
			let COUNTER=$COUNTER+1
		done	
		
		sleep 1
		echo -e "${NORMAL}"
		bootstrapCD
	fi

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

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

		bad_msg 'Could not find CD to boot, something else needed!'
		bad_msg 'The CD should have a "livecd" file inside'
		CDROOT=0
	fi
fi

setup_keymap

# Determine root device
good_msg 'Determining root device...'
while true
do
	while [ "${got_good_root}" != '1' ]
	do
		case "${REAL_ROOT}" in
			LABEL\=*|UUID\=*)
			
				ROOT_DEV=""
				retval=1

				if [ "${retval}" -ne '0' ]; then
					ROOT_DEV=`findfs "${REAL_ROOT}" 2>/dev/null`
					retval=$?
				fi
				
				if [ "$retval" -ne '0' ]; then
					ROOT_DEV=`busybox findfs "${REAL_ROOT}" 2>/dev/null`
					retval=$?
				fi
				
				if [ "${retval}" -ne '0' ]; then
					ROOT_DEV=`blkid -t "${REAL_ROOT}" | cut -d ":" -f 1 2>/dev/null`
					retval=$?
				fi
				
				if [ "${retval}" -eq '0' ] && [ -n "${ROOT_DEV}" ]; then
					good_msg "Detected real_root=${ROOT_DEV}"
					REAL_ROOT="${ROOT_DEV}"
				else
					bad_msg "Could not find root block device: ${REAL_ROOT}"
					echo '   Please specify a device to boot, or "shell" for a shell...'
					echo -n 'boot() :: '
					read REAL_ROOT
					got_good_root=0
					continue
				fi
				;;
		esac
				
		if [ "${REAL_ROOT}" = 'shell' ]
		then
			run_shell

			REAL_ROOT=''
			got_good_root=0
			continue
		
		elif [ "${REAL_ROOT}" = '' ]
		then
			# No REAL_ROOT determined/specified. Prompt user for root block device.
			bad_msg "The root block device is unspecified or not detected."
			echo '   Please specify a device to boot, or "shell" for a shell...'
			echo -n 'boot() :: '
			read REAL_ROOT
			got_good_root=0

		# Check for a block device or /dev/nfs
		elif [ -b "${REAL_ROOT}" ] || [ "${REAL_ROOT}" = "/dev/nfs" ]
		then
			got_good_root=1

		else
			bad_msg "Block device ${REAL_ROOT} is not a valid root device..."
			REAL_ROOT=""
			got_good_root=0
		fi
	done


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

		# Try to mount the device as ${NEW_ROOT}
		if [ "${REAL_ROOT}" = '/dev/nfs' ]; then
			findnfsmount
		else
			# mount ro so fsck doesn't barf later
#			REAL_ROOT_TYPE=`vol_id -t ${REAL_ROOT}`
#			mount -t ${REAL_ROOT_TYPE} -o ro ${REAL_ROOT} ${NEW_ROOT}
			if [ "${REAL_ROOTFLAGS}" = '' ]; then
				mount -o ro ${REAL_ROOT} ${NEW_ROOT}
			else
				good_msg "Using mount -o ro,${REAL_ROOTFLAGS}"
				mount -o ro,${REAL_ROOTFLAGS} ${REAL_ROOT} ${NEW_ROOT}
			fi
		fi
		
		# If mount is successful break out of the loop 
		# else not a good root and start over.

		if [ "$?" = '0' ]
		then
			break
		else
			bad_msg "Could not mount specified ROOT, try again"
			got_good_root=0
			REAL_ROOT=''
		fi
	fi
done
# End determine root device

#verbose_kmsg

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

	# Find loop and looptype if we have NFS-mounted a livecd
	if  [ "${LOOP}" = '' ] && [ "${REAL_ROOT}" = '/dev/nfs' ]
	then
	  cd ${NEW_ROOT}/mnt/cdrom
    LOOP="`ls *.loop 2>/dev/null`"
    LOOP="$LOOP `ls *.gcloop  2>/dev/null`"
    LOOP="$LOOP `ls *.squashfs  2>/dev/null`"
    LOOP="$LOOP `ls *zisofs  2>/dev/null`"
    LOOP="$LOOP `ls boot/*.loop 2>/dev/null`"
    LOOP="$LOOP `ls boot/*.gcloop  2>/dev/null`"
    LOOP="$LOOP `ls boot/*.squashfs  2>/dev/null`"
    LOOP="$LOOP `ls boot/*zisofs  2>/dev/null`"
    LOOPTYPE=`get_looptype $LOOP`
    # append / to each file because each image should be an absolute path
    #LOOP="/${LOOP// / /}" 
    LOOPa=""
    for x in $LOOP
    do
      LOOPa="$LOOPa /$x"
    done
    LOOP=$LOOPa
    cd /
	fi

  # Convert a comma separated list in a space separated list
	LOOP="`split $LOOP`"
	# Failsafe the loop type wasn't set
	if [ "${LOOPTYPE}" = '' ]
	then
		warn_msg 'Warning: loop type unspecified!'
		LOOPTYPE=`get_looptype $LOOP`
	else
		LOOPTYPE="`split $LOOPTYPE`"
    if [ -n "`echo $LOOPTYPE | grep " "`" ] || [ -n "`echo $LOOP | grep " "`" ]
    then # when there is just one element on the list, cut has a rare behavior
         # echo "/livecd.squashfs" | cut -d" " -f$x  # where x can be any number and the result is always the same
  		i=1
      x=0
		  while
  		  LOOPTYPEa="`echo $LOOPTYPE | cut -d" " -f1`"
	  	  LOOPa="`echo $LOOP | cut -d" " -f1`"

        [ $i -gt 10 ] && false && echo "false"
        [ -n "$LOOPTYPEa" ] && true || false
      do
			  [ $i -gt 10 ] && break && echo "break"
				[ -z "$LOOPa" ] && x=1
        i=$((i+1))
      done
      [ -z "$LOOPTYPEa" ] && [ -n "$LOOPa" ] && x=2
      if [ $x -ne 0 ]
	    then
 		    bad_msg "The amount of elements on looptype differs from loop"
		    bad_msg "Please export LOOPTYPE with a valid list of looptype (squashfs, loop, gcloop, sizofs, noloop)"
  		  bad_msg "  for [ $LOOP ] on that order, or reboot and pass a proper loop=..."
	  	  bad_msg 'kernel command line!'
		    run_shell
        LOOPTYPE="`split $LOOPTYPE`"
      fi
	  fi
  fi

# So, LOOP is a space separated list of absolute paths to mountable filesystems
# and LOOPTYPE is a space separated list of its filesystems type in the same order

	cache_cd_contents
	# Setup the loopback mounts

# Mounting all filesystems if necessary. Usually is just one.
FS_LOCATION=""
if [ -n "`echo $LOOPTYPE | grep " "`" ] || [ -n "`echo $LOOP | grep " "`" ]
then # when there is just one element on the list, cut has a rare behavior
     # echo "/livecd.squashfs" | cut -d" " -f$x  # where x can be any number and the result is always the same
  i=1
  while
    LOOPTYPEa="`echo $LOOPTYPE | cut -d" " -f$i`"
    LOOPa="`echo $LOOP | cut -d" " -f$i`"
    [ -n "$LOOPTYPEa" ] && true || false
  do
    mount_fs $LOOPTYPEa $LOOPa
    i=$((i+1))
  done
else
  mount_fs $LOOPTYPE $LOOP
fi

#
# End cdrom looptype determination and mounting if necessary
#



	if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
	then
    for x in $FS_LOCATION
    do
  		union_insert_dir ${UNION} ${NEW_ROOT}/$x
    done
		
		# Make sure fstab notes livecd is mounted ro.  Makes system skip remount which fails on unionfs dirs.
		
		# i think that this lines are making problems, as checkroot
		# does check for a unionfs if unionctl is installed on the livecd
		#sed -e 's|\(.*\s/\s*tmpfs\s*\)defaults\(.*\)|\1defaults,ro\2|' /${UNION}/etc/fstab > /${UNION}/etc/fstab.new
		#mv /${UNION}/etc/fstab.new /${UNION}/etc/fstab
	fi

	# Unpacking additional packages from NFS mount
	# This is useful for adding kernel modules to /lib
	# We do this now, so that additional packages can add whereever they want.
	if [ "${REAL_ROOT}" = '/dev/nfs' ]
	then
		if [ -e "${CHROOT}/mnt/cdrom/add" ]
		then
				for targz in `ls ${CHROOT}/mnt/cdrom/add/*.tar.gz`
				do	
					tarname=`basename ${targz}`
					good_msg "Adding additional package ${tarname}"
					(cd ${CHROOT} ; /bin/tar -xzf ${targz})
				done
		fi
	fi

# if unionfs is not available copy cdrom contents to memory
# but if we have a multiple branches cd this is not possible, we need unionfs
	if [ ! "${USE_UNIONFS_NORMAL}" -eq '1' ] && [ -z "`echo ${FS_LOCATION} | cut -d" " -f2`" ]
	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})

		# 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
				for directory in `find "${NEW_ROOT}/${FS_LOCATION}/${x}" -type d 2>/dev/null`
				do
					## Strip the prefix of the FS_LOCATION
					directory=${directory#${NEW_ROOT}/${FS_LOCATION}/}

					## Skip this directory if we already linked a parent directory
					if [ "${curent_parrent}" != '' ]; then
						var=`echo "${directory}" | grep "^${curent_parrent}"`
						if [ "${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
						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

		[ "${DO_slowusb}" ] && sleep 10
		mkdir initrd proc tmp sys 2>/dev/null
		chmod 1777 tmp
	fi
	
	#UML=`cat /proc/cpuinfo|grep UML|sed -e 's|model name.*: ||'`
	#if [ "${UML}" = 'UML' ]
	#then
	#	# UML Fixes
	#	good_msg 'Updating for uml system'
	#fi

	# Let Init scripts know that we booted from CD
	export CDBOOT
	CDBOOT=1
	[ "${DO_slowusb}" ] && sleep 10
else

# ============================================================================
	if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
	then
		# this line is completely unusefull when working with unionfs
  # if we make NEW_ROOT=$UNION we have all /mnt/* mounted on it and then
	# extra branches added after UNION
  # having too much branches makes the resultant filesystem much more slower
  # not to mention in a multiple branches livecd
		#union_insert_dir ${UNION} ${NEW_ROOT}
		mkdir -p ${UNION}/tmp/.initrd
	fi
# ============================================================================
fi

# 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}
	# for what is it?
	# i only see it usefull with noloop's livecd, but for that reason my method is better
	# passing loop=/my_subdir and looptype=noloop
	# $SUBDIR is obsolete
fi

verbose_kmsg

echo
mount
echo

# Move the /memory mount point to what will be the system root so that 
# init scripts will be able to unmount it properly at next reboot
#
# Eventually, all "unions over /" mounts should go in that /.unions/
if [ "${USE_UNIONFS_NORMAL}" -eq '1' ]
then
	mkdir -p /${CHROOT}/.unions/memory 2>/dev/null
	mount -o move /memory /${CHROOT}/.unions/memory || echo '*: Failed to move unionfs /memory into the system root!'
fi

if [ "$0" = '/linuxrc' ] || [ "$0" = 'linuxrc' ]
then
	[ ! -e ${CHROOT}/dev/console ] && mknod ${CHROOT}/dev/console c 5 1
	echo -ne "${GOOD}>>${NORMAL}${BOLD} Booting"

	cd ${CHROOT}
	mkdir ${CHROOT}/proc ${CHROOT}/sys 2>/dev/null
	pivot_root . tmp/.initrd
	[ "${DO_slowusb}" ] && sleep 10
	echo -n '.'

	if /tmp/.initrd/bin/[ "${USE_DEVFS_NORMAL}" -eq '1' -a "${CDROOT}" -eq '0' ]
	then
		umount /tmp/.initrd/proc || echo '*: Failed to unmount the initrd /proc!'
		mount -n --move /tmp/.initrd/dev dev || echo '*: Failed to move over the /dev tree!'
		rm -rf /tmp/.initrd/dev || echo '*: Failed to remove the initrd /dev!'
	elif /tmp/.initrd/bin/[ "${USE_UDEV_NORMAL}" -eq '1' ]
	then
		/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/fd ] && rm /tmp/.initrd/dev/fd
		/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/stdin ] && rm /tmp/.initrd/dev/stdin
		/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/stdout ] && rm /tmp/.initrd/dev/stdout
		/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/stderr ] && rm /tmp/.initrd/dev/stderr
		/tmp/.initrd/bin/[ -e /tmp/.initrd/dev/core ] && rm /tmp/.initrd/dev/core 
		umount /tmp/.initrd/dev || echo '*: Failed to unmount the initrd /dev!'
		umount /tmp/.initrd/proc || echo '*: Failed to unmount the initrd /proc!'
		umount /tmp/.initrd/sys || echo '*: Failed to unmount the initrd /sys!'
	elif /tmp/.initrd/bin/[ "${CDROOT}" -eq '1' ]
	then
		umount /tmp/.initrd/proc || echo "*: Failed to unmount the initrd /proc!"
		umount /dev 2>/dev/null
		mount -n --move /tmp/.initrd/dev dev 2>/dev/null
		rm -rf /tmp/.initrd/dev || echo '*: Failed to remove the initrd /dev!'

		umount /sys 2>/dev/null
		umount /tmp/.initrd/sys 2>/dev/null
	fi
	echo -n '.'

	# /usr/src/linux/Documentation/initrd.txt:
	#	exec chroot . /sbin/init </dev/console >/dev/console 2>&1

	exec <dev/console >dev/console 2>&1
	echo '.'
	exec chroot . /bin/sh <<- EOF
		umount /tmp/.initrd || echo "*: Failed to unmount the initrd!"
		/sbin/blockdev --flushbufs /dev/ram0 >/dev/null 2>&1
		exec ${REAL_INIT:-/sbin/init} ${INIT_OPTS}
EOF
elif [ "$0" = '/init' ]
then
	[ ! -e ${CHROOT}/dev/console ] && mknod ${CHROOT}/dev/console c 5 1
	[ ! -e ${CHROOT}/dev/tty1 ] && mknod ${CHROOT}/dev/tty1 c 4 1
	echo -ne "${GOOD}>>${NORMAL}${BOLD} Booting (initramfs)"

  if [ ! -e ${CHROOT}/sbin/init ]
  then
 		  bad_msg "Cant find the necessary file $CHROOT${REAL_INIT:-/sbin/init}"
		  bad_msg "Check your mounted file system. $CHROOT should be a working system."
		  bad_msg 'kernel command line!'
		  run_shell
  fi

	cd ${CHROOT}
	mkdir ${CHROOT}/proc ${CHROOT}/sys 2>/dev/null
	echo -n '.'
		umount /sys || echo '*: Failed to unmount the initrd /sys!'
		umount /proc || echo '*: Failed to unmount the initrd /proc!'
	echo -n '.'

  echo "switch_root -c /dev/console ${CHROOT} ${REAL_INIT:-/sbin/init}"
	exec switch_root -c "/dev/console" "${CHROOT}" ${REAL_INIT:-/sbin/init}
fi

splash 'verbose'

echo 'A fatal error has probably occured since /sbin/init did not'
echo 'boot correctly. Trying to open a shell...'
echo
exec /bin/bash
exec /bin/sh
exec /bin/ash
exec sh