#!/static/sh
#
# KNOPPIX General Startup Script
# (C) Klaus Knopper <knoppix@knopper.net>
#
#
# This script needs some of the builtin ash commands (if, test, ...)
# mount/umount, insmod/rmmod are also a builtin in ash-knoppix.
#

echo $0 started >/linuxrc.started
log=/linuxrc.log
set>$log


# hardcoded configurable options
# Default maximum size of dynamic ramdisk in kilobytes
RAMSIZE=1000000
# End of options

# Don't allow interrupt signals
trap "" 1 2 3 15

# "Safe" SCSI modules in the right order for autoprobe
# Warning: The sym53c8xx.o and g_NCR* cause a kernel Oops if no such adapter
# is present.
#
# NB: It looks like that ncr53c8xx.o is more stable than 53c7,8xx.o for
# a ncr53c810 controller (at least on my installation box it's more
# immune to SCSI timeouts)
# Removed 53c7,8xx -> crashes if no device attached.
# Removed AM53C974 -> crashes tmscsim if adapter found
# Added initio.o on request (untested)
SCSI_MODULES="aic7xxx.o aic7xxx_old.o BusLogic.o \
ncr53c8xx.o NCR53c406a.o \
initio.o mptscsih.o \
advansys.o aha1740.o aha1542.o aha152x.o \
atp870u.o dtc.o eata.o fdomain.o gdth.o \
megaraid.o pas16.o pci2220i.o pci2000.o psi240i.o \
qlogicfas.o qlogicfc.o qlogicisp.o \
seagate.o t128.o tmscsim.o u14-34f.o ultrastor.o wd7000.o \
a100u2w.o 3w-xxxx.o"

# Misc functions

INSMOD="insmod"
[ -x /modules/insmod ] && INSMOD="/modules/insmod"

RMMOD="rmmod"
[ -x /modules/rmmod ] && RMMOD="/modules/rmmod"

mounted(){
   echo $1>/mounted_fstype
   echo $2>/mounted_rorw
   echo $4>/mounted_option
   echo mounted: -t $1 -o $4 $5 $6 >>$log
   return 0
}

mountit(){
# Usage: mountit src dst "options"
# Uses builtin mount of ash.knoppix
if [ -b $1 ]; then
   # Builin filesystems
   case "$1" in
      /dev/scd*|/dev/hd?|/dev/sd?) BUILTIN_FS="iso9660"; ;;
      /dev/cloop)                  BUILTIN_FS="iso9660 ext2"; ;;
      /dev/hd* |/dev/sd*)          BUILTIN_FS="vfat ntfs ext2"; ;;
      *)                           BUILTIN_FS="iso9660 ext2 vfat ntfs"; ;;
   esac
   #checkbootparam lang=ja && iocharset=",iocharset=euc-jp,codepage=932" || iocharset=""
   checkbootparam lang=ja && iocharset=",iocharset=euc-jp" || iocharset=""
   for fs in $BUILTIN_FS; do
      for opt in $3; do
         case "$opt" in
            -o) ;;
            ro) rorw="ro"; ;; 
            rw) rorw="rw"; ;;
            *) ;;
         esac
      done
      case "$fs" in
         iso9660) rorw="ro"; option="-o $rorw$iocharset"; ;;
         ext2)               option="-o $rorw"; ;;
         reiserfs)           option="-o $rorw"; ;;
         vfat)               option="-o $rorw,umask=022,uid=1000,gid=1000,nosuid,nodev$iocharset"; ;;
         ntfs)    rorw="ro"; option="-o $rorw,umask=022,uid=1000,gid=1000,nosuid,nodev$iocharset"; ;;
      esac
      if [ -x /static/mount ]; then
         echo /static/mount -t $fs $option $1 $2 >>$log
         /static/mount      -t $fs $option $1 $2 >>$log 2>&1 && mounted $fs $rorw $option $1 $2 && return 0
      else
         echo mount -t $fs -o $rorw $1 $2 >>$log
         mount      -t $fs -o $rorw $1 $2 >>$log 2>&1 && mounted $fs $rorw -o $rorw $1 $2 && return 0
      fi
   done
else
   echo mountit $1 $2 $3: $1 is not block device. >>$log
fi
return 1
}

FOUND_SCSI=""
FOUND_KNOPPIX=""
INTERACTIVE=""

# Clean input/output
exec >/dev/console </dev/console 2>&1

# Define Escape Sequense for echo
. /linuxrc.inc

echo ""
# Be verbose
echo "${WHITE}Welcome to the ${CYAN}K${MAGENTA}N${YELLOW}O${WHITE}P${RED}P${GREEN}I${BLUE}X${WHITE} live Linux-on-CD!${NORMAL}"
echo ""
echo ""

# We only need the builtin commands and /static at this point
PATH=/static
export PATH

umask 022

# Mount /proc and /dev/pts
mount -t proc /proc /proc

# Disable kernel messages while probing modules in autodetect mode
echo "0" > /proc/sys/kernel/printk

mount -t devpts /dev/pts /dev/pts
# Kernel 2.6
mount -t sysfs /sys /sys >>$log 2>&1

# Read boot command line with builtin cat command (shell read function fails in Kernel 2.4.19-rc1)
CMDLINE="$(cat /proc/cmdline)"

# same for strings
stringinstring(){
   case " $2 " in *\ $1\ *) return 0;; esac
   return 1
}

# Check boot commandline for specified option
checkbootparam(){
   stringinstring "$1" "$CMDLINE"
   return "$?"
}

# Check if we are in interactive startup mode
case "$CMDLINE" in *BOOT_IMAGE=expert\ *) INTERACTIVE="yes"; :>/interactive; ;; esac
case "$CMDLINE" in *modules-disk*) INTERACTIVE="yes"; ;; esac
# Does the user want to skip scsi detection?
NOSCSI=""
case "$CMDLINE" in *noscsi*|*nobootscsi*) NOSCSI="yes"; ;; esac
case "$CMDLINE" in *nousb*|*nobootusb*) NOUSB="yes"; ;; esac
case "$CMDLINE" in *nofirewire*|*nobootfirewire*) NOFIREWIRE="yes"; ;; esac
NOCD=""
case "$CMDLINE" in *fromhd*) NOCD="yes"; ;; esac
case "$CMDLINE" in *fromdvd*) FROMDVD="yes"; ;; esac
case "$CMDLINE" in *idecd*|*atapicd*) IDECD="yes"; ;; esac
case "$CMDLINE" in *noideraid*) NOIDERAID="yes"; ;; esac

KNOPPIX_DIR="KNOPPIX"
KNOPPIX_NAME="KNOPPIX"
case "$CMDLINE" in *knoppix_dir=*) KNOPPIX_DIR="$knoppix_dir"; ;; esac
case "$CMDLINE" in *knoppix_name=*) KNOPPIX_NAME="$knoppix_name"; ;; esac

# WARNING: In Kernel 2.4.27, CD-Roms cease to work if both, ide-scsi and ide-cd, are loaded. :-(
if test -n "$IDECD"; then
# Use ide-cd for ATAPI-only CD-Rom(s)
$INSMOD /modules/scsi/ide-cd.o >>$log 2>&1
else
# Check for IDE-SCSI capable CD-Rom(s) first
$INSMOD /modules/scsi/ide-scsi.o >>$log 2>&1
fi

# Mount module disk
mountmodules(){
TYPE="$1"; shift
echo -n "${CRE}${CYAN}Please insert ${TYPE} modules disk and hit Return. ${NORMAL}"
read a
echo -n "${CRE}${BLUE}Mounting ${TYPE} modules disk... ${NORMAL}"
# We always mount over /modules/scsi (because it's there ;-)
if mountit /dev/fd0 /modules/scsi "-o ro"; then
echo "${GREEN}OK.${NORMAL}"
return 0
fi
echo "${RED}NOT FOUND.${NORMAL}"
return 1
}

# Unmount module disk
umountmodules(){
   TYPE="$1"; shift
   echo -n "${CRE}${BLUE}Unmounting ${TYPE} modules disk... ${NORMAL}"
   umount /modules/scsi 2>>$log
   echo "${GREEN}DONE.${NORMAL}"
}

# Ask user for modules
askmodules(){
   TYPE="$1"; shift
   echo "${BLUE}${TYPE} modules available:${WHITE}"
   c=""; for m in "$@"; do
   if test -f "/modules/scsi/$m"; then
      test -z "$c"  && { echo -n "  $m"; c="1"; } || { echo "       $m"; c=""; }
   fi
   done
   [ -n "$c" ] && echo ""
   echo "${CYAN}Load ${TYPE} Modules?${NORMAL}"
   echo "${CYAN}[Enter full filename(s) (space-separated), Return for autoprobe, ${WHITE}n${CYAN} for none] ${NORMAL}"
   echo -n "${CYAN}insmod module(s)> ${NORMAL}"
   read MODULES
   case "$MODULES" in n|N) MODULES=""; ;; y|"")  MODULES="$*"; ;; esac
}

# Try to load the given modules (full path or current directory)
loadmodules(){
   TYPE="$1"; shift
   test -n "$INTERACTIVE" && echo "6" > /proc/sys/kernel/printk
   for i in "$@"; do
      echo -n "${CRE}${BLUE}Probing ${TYPE}... ${MAGENTA}$i${NORMAL}"
      echo "Probing ${TYPE}... $i" >>$log
      if test -f /modules/scsi/$i && $INSMOD -f /modules/scsi/$i >>$log 2>&1
      then
         case "$i" in *ataraid*) ;; *) echo "${CRE} ${GREEN}Found ${TYPE} device(s) handled by ${MAGENTA}$i${GREEN}.${NORMAL}" ;; esac
         case "$TYPE" in scsi|SCSI) FOUND_SCSI="yes"; ;; esac
      fi
   done
   test -n "$INTERACTIVE" && echo "0" > /proc/sys/kernel/printk
   echo -n "${CRE}"
}

snapprocinf() {
   echo "----------" /proc "----------"
   echo /proc/* /proc/scsi/* /proc/bus/*/*
   for proc in /proc/cmdline /proc/modules /proc/partitions /proc/filesystems /proc/devices /proc/scsi/scsi /proc/bus/*/d* /proc/pci; do
       echo "----------" $proc "----------"
       cat $proc
   done
   echo "----------" end /proc "----------"
}

callash() {
   echo "$*"
   echo ""
   echo "${RED}Dropping you to a (very limited) shell.${NORMAL}"
   echo ""
   echo "Additional builtin commands avaliable:"
   echo "   cat        mount     umount"
   echo "   insmod     rmmod     lsmod"
   echo ""
   PS1="knoppix# "
   export PS1
   echo "6" > /proc/sys/kernel/printk
   # Allow signals
   trap 1 2 3 15
   /static/ash
}

# Check for SCSI, use modules on bootfloppy first
if test -n "$INTERACTIVE"; then
   # Let the user select interactively
   askmodules SCSI $(cd /modules/scsi; echo *.o)
else
   # these are the autoprobe-safe modules
   MODULES="$SCSI_MODULES"
fi
test -z "$NOSCSI" && test -n "$MODULES" && loadmodules SCSI $MODULES
# End of SCSI check

# Check for IDE-Raid devices
if test -z "$NOIDERAID"; then
( cd /modules/scsi; { $INSMOD ataraid.o >>$log 2>&1 && $INSMOD silraid.o >>$log 2>&1 ; } || $INSMOD medley.o >>$log 2>&1 || $INSMOD pdcraid.o >>$log 2>&1 )
fi
# End of IDE-Raid check

# Check for USB, use modules on bootfloppy first
if test -z "$NOUSB"; then
echo -n "${CRE}${BLUE}Checking for for USB...${NORMAL}"
if test -f /modules/scsi/usbcore.o; then
$INSMOD /modules/scsi/usbcore.o >>$log 2>&1
FOUNDUSB=""
for i in usb-uhci.o usb-ohci.o ehci-hcd.o; do
test -f /modules/scsi/$i && $INSMOD /modules/scsi/$i >>$log 2>&1 && FOUNDUSB="yes"
done
if test -n "$FOUNDUSB"; then
test -f /modules/scsi/usb-storage.o && $INSMOD /modules/scsi/usb-storage.o >>$log 2>&1
else
# For an unknown reason, unloading usbcore hangs smetimes
# rmmod usbcore >>$log 2>&1
true
fi
fi
echo -n "${CRE}"
fi
# End of USB check

# Check for Firewire, use modules on bootfloppy first
if test -z "$NOFIREWIRE"; then
echo -n "${CRE}${BLUE}Checking for Firewire...${NORMAL}"
if test -f /modules/scsi/ieee1394.o; then
echo -n "${CRE}${BLUE}Loading ieee1394...${NORMAL}"
$INSMOD /modules/scsi/ieee1394.o >>$log 2>&1
FOUNDFIREWIRE=""
for i in ohci1394.o; do
echo -n "${CRE}${BLUE}Loading $i...${NORMAL}"
test -f /modules/scsi/$i && $INSMOD /modules/scsi/$i >>$log 2>&1 && FOUNDFIREWIRE="yes"
done
if test -n "$FOUNDFIREWIRE"; then
echo -n "${CRE}${BLUE}Loading sbp2.o...${NORMAL}"
test -f /modules/scsi/sbp2.o && $INSMOD /modules/scsi/sbp2.o sbp2_serialize_io=1 >>$log 2>&1
else
# For an unknown reason, unloading ieee1394 hangs smetimes
# echo -n "${CRE}${BLUE}Unloading ieee1394...${NORMAL}"
# rmmod ieee1394 >>$log 2>&1
true
fi
fi
echo -n "${CRE}"
fi
# End of FIREWIRE check

# Unfortunately, hotpluggable devices tend to need some time in order to register
if test -n "$FOUNDUSB" -o -n "$FOUNDFIREWIRE"; then
echo -n "${CRE}${BLUE}Scanning for USB/Firewire devices... ${NORMAL}"
if test -n "$FOUNDFIREWIRE"; then
# Wait for driver to register
sleep 2
# Kernel 2.6 does this automatically
case "$(cat /proc/version 2>>$log)" in *version\ 2.6.*) ;; *) for host in 0 1 2 3 4 5 6 7; do for channel in 0 1; do for id in 0 1 2 3 4 5 6 7; do echo "scsi add-single-device $host $channel $id 0" >/proc/scsi/scsi 2>>$log; done; done; done ;; esac
fi
sleep 6
echo "${BLUE}Done.${NORMAL}"
fi

# Check for misc modules in expert mode
if test -n "$INTERACTIVE"; then
   another=""; answer=""
   while test "$answer" != "n" -a "$answer" != "N"; do
      echo -n "${CYAN}Do you want to load additional modules from$another floppy disk? [${WHITE}Y${CYAN}/n] ${NORMAL}"
      another=" another"
      read answer
      case "$answer" in n*|N*) break; ;; esac
      if mountmodules new; then
         askmodules new $(cd /modules/scsi; echo *.o)
         test -n "$MODULES" && loadmodules new $MODULES
         umountmodules current
      fi
   done
fi
# All interactively requested modules should be loaded now.

# Check for ide-scsi supported CD-Roms et al.
test -f /proc/scsi/scsi && FOUND_SCSI="yes"

# Disable kernel messages again
echo "0" > /proc/sys/kernel/printk

# We now enable DMA right here, for faster reading/writing from/to IDE devices
# in FROMHD or TORAM mode
case "$CMDLINE" in *\ nodma*) ;; *)
for d in $(cd /proc/ide 2>>$log && echo hd[a-z]); do
if test -d /proc/ide/$d; then
MODEL="$(cat /proc/ide/$d/model 2>>$log)"
test -z "$MODEL" && MODEL="[GENERIC IDE DEVICE]"
echo "${BLUE}Enabling DMA acceleration for: ${MAGENTA}$d        ${YELLOW}[${MODEL}]${NORMAL}"
echo "using_dma:1" >/proc/ide/$d/settings
fi
done
;;
esac

# insmod nls_*.o
insmod_modules="/modules/nls_*.o"
insmod_modules="$insmod_modules /modules/ntfs.o"
for i in $insmod_modules; do
    insmod -f $i >>$log 2>&1 || echo insmod $i: failed
done
snapprocinf >>$log 2>&1

# Now that the right SCSI driver is (hopefully) loaded, try to find CDROM
DEVICES="/dev/hd?"
test -n "$FOUND_SCSI" -a -z "$NOCD" && DEVICES="/dev/scd? /dev/scd?? $DEVICES"
# New: Also try parallel port CD-Roms [for Mike].
DEVICES="$DEVICES /dev/pcd?"
# New: also check HD partitions for a KNOPPIX/KNOPPIX image
test -n "$FOUND_SCSI" -a -z "$NOSCSI"&& DEVICES="$DEVICES /dev/sd?[1-9] /dev/sd?[1-9][0-9]"
DEVICES="$DEVICES /dev/hd?[1-9] /dev/hd?[1-9][0-9]"
case "$CMDLINE" in
    *fromhd=/dev/*)
        DEVICES="$fromhd";
	;;
    *bootfrom=/dev/*)
        DEVICES="${bootfrom#/dev/}";
	DEVICES="/dev/${DEVICES%%/*}"
	;;
esac
echo DEVICES="$DEVICES" >>$log

while true; do
  for i in $DEVICES
  do
    MOUNTOPTION="ro"
    case "$i" in /dev/hd??|/dev/sd??) MOUNTOPTION="rw"; ;; esac
    echo -n "${CRE}${BLUE}Looking for CDROM in: ${MAGENTA}$i${NORMAL} $MOUNTOPTION "
    echo "Looking for CDROM in: $i $MOUNTOPTION ">>$log
    if mountit $i /cdrom "-o $MOUNTOPTION" >>$log 2>&1
    then
      case "$CMDLINE" in 
      *bootfrom=/dev/*)
        echo "$FOUND_KNOPPIX /cdrom $(cat /mounted_fstype) $(cat /mounted_option) 0 0" >>/etc/fstab
        echo "$FOUND_KNOPPIX /cdrom $(cat /mounted_fstype) $(cat /mounted_option) 0 0" >/linuxrc.mounted.cdrom
        break 2;
        ;;
      esac
      if test -f /cdrom/$KNOPPIX_DIR/$KNOPPIX_NAME
      then
        echo -n "${CRE} ${GREEN}Accessing KNOPPIX CDROM at ${MAGENTA}$i${GREEN}...${NORMAL}"
        echo "Accessing KNOPPIX CDROM at $i..." >>$log
        FOUND_KNOPPIX="$i"
        echo "$FOUND_KNOPPIX /cdrom $(cat /mounted_fstype) $(cat /mounted_option) 0 0" >>/etc/fstab
        echo "$FOUND_KNOPPIX /cdrom $(cat /mounted_fstype) $(cat /mounted_option) 0 0" >/linuxrc.mounted.cdrom
	if [ "$(cat /mounted_rorw)" = "rw" ]; then
	   echo
	   echo -n Output linuxrc log to /cdrom/temp/rc.log
	   [ ! -d /cdrom/temp ] && mkdir -p /cdrom/temp
	   cat $log >/cdrom/temp/rc.log
	   log=/cdrom/temp/rc.log
	fi
        break 2;
      fi
      umount /cdrom
    fi
  done
  callash "Can not find system cdrom. Please exit to retry, or reset to quit."
done

# Harddisk-installed script part version has been removed
# (KNOPPIX can be booted directly from HD now).

mount_knoppix()
{
  if test -n "$FOUND_KNOPPIX" -a -f $1/$KNOPPIX_DIR/$KNOPPIX_NAME; then
    # DEBUG
    # echo "6" > /proc/sys/kernel/printk
    $INSMOD -f /modules/cloop.o file=$1/$KNOPPIX_DIR/$KNOPPIX_NAME >>$log 2>&1
    mountit /dev/cloop /KNOPPIX "-o ro" || FOUND_KNOPPIX=""
  fi
}

remount_knoppix()
{
  if test -f $TARGET/$KNOPPIX_DIR/$KNOPPIX_NAME; then
    umount /KNOPPIX >>$log 2>&1 # unmount it
    echo "$RMMOD cloop" | /static/ash # release CD - ash crashes with parts of libc in memory -- FF
    umount $SOURCE >>$log 2>&1  # unmount CD
    [ -n "$SOURCE2" ] && umount $SOURCE2 >>$log 2>&1  # umount possible loop-device
    mount_knoppix $TARGET
  else
    echo "${CRE} ${RED}Warning: Changing to $TARGET failed.${NORMAL}"
    return 1
  fi
  
  return 0
}

boot_from()
{
  # preparations
  /bin/mkdir $TARGET

  SOURCE_DEV=$(echo $CMDLINE | /usr/bin/tr ' ' '\n' | /bin/sed -n '/bootfrom=/s/.*=//p' | /usr/bin/tail -1)
  
  LOOP_DEV=$(echo $SOURCE_DEV | awk -F/ '{ print $1 "/" $2 "/" $3 }')
  ISO_PATH=$(echo $SOURCE_DEV | /bin/sed "s|$LOOP_DEV||g" )
  case "$ISO_PATH" in /*.[iI][sS][oO]) ;; *) ISO_PATH="" ;; esac
  LOOP_SOURCE=""
  
  # load filesystems
  insmod /modules/reiserfs.o >>$log 2>&1
  #insmod /modules/ntfs.o >>$log 2>&1    # BE CAREFUL! - Only mount it read only! - FF
  #/KNOPPIX/sbin/modprobe reiserfs
  #/KNOPPIX/sbin/modprobe ntfs    # BE CAREFUL! - Only mount it read only! - FF
 
  if [ -n "$ISO_PATH" ]
  then
     LOOP_SOURCE="$TARGET.loop"
     LOOP_SOURCE2="$LOOP_SOURCE"
     TARGET_DEV="$LOOP_SOURCE$ISO_PATH"
     /bin/mkdir $LOOP_SOURCE
     insmod /modules/loop.o >>$log 2>&1
     #/KNOPPIX/sbin/modprobe loop

     #/bin/mount -o ro $LOOP_DEV $LOOP_SOURCE || LOOP_SOURCE=""
     mountit $LOOP_DEV $LOOP_SOURCE -o ro || LOOP_SOURCE=""
     /bin/mount -n -o loop $LOOP_SOURCE2$ISO_PATH $TARGET
  else
     TARGET_DEV="$SOURCE_DEV"
     #/bin/mount -n -o ro $SOURCE_DEV $TARGET >>$log 2>&1
     mountit $SOURCE_DEV $TARGET -o ro
  fi
  if [ $? -ne 0 ]
  then
     [ -n "$LOOP_SOURCE" ] && /bin/umount $LOOP_SOURCE
     echo -n "${CRE} ${RED}Accessing KNOPPIX CDROM failed. ${MAGENTA}$TARGET_DEV${RED} is not mountable.${NORMAL}"
     sleep 2
     return 1
  fi
  
  if [ -f $TARGET/$KNOPPIX_DIR/$KNOPPIX_NAME ]
  then
    echo -n "${CRE} ${GREEN}Accessing KNOPPIX CDROM at ${MAGENTA}$TARGET_DEV${GREEN}...${NORMAL}"
    FOUND_KNOPPIX="$TARGET"
  else
    echo -n "${CRE} ${RED}Accessing KNOPPIX CDROM failed. Could not find $KNOPPIX_DIR/$KNOPPIX_NAME on ${MAGENTA}$TARGET_DEV${RED}.${NORMAL}"
    [ -n "$LOOP_SOURCE" ] && /bin/umount $LOOP_SOURCE
    umount $TARGET
    sleep 2
    return 1
  fi
  # remount the CD 
  remount_knoppix
}

copy_to()
{
  # preparations
  /bin/mkdir $TARGET
  COPY="$SOURCE/$KNOPPIX_DIR"

  # look if we copy to hd or to ram
  SIZE="$(/usr/bin/du -s $COPY | /usr/bin/gawk '{print int($1*1.1)}')"
  test -n "$SIZE" || SIZE="800000"
  
  case "$1" in 
    ram)
      TARGET_DEV="/dev/shm"
      TARGET_DEV_DESC="ramdisk"
      FOUNDSPACE="$(/usr/bin/gawk '/MemTotal/{print $2}' /proc/meminfo)"
      /bin/mount -n -t tmpfs -o size=${SIZE}k $TARGET_DEV $TARGET
    ;;
    hd)
      TARGET_DEV=$(echo $CMDLINE | /usr/bin/tr ' ' '\n' | /bin/sed -n '/tohd=/s/.*=//p' | /usr/bin/tail -1)
      TARGET_DEV_DESC="$TARGET_DEV"
      # load filesystems
      /KNOPPIX/sbin/modprobe reiserfs
      /KNOPPIX/sbin/modprobe jbd
      /KNOPPIX/sbin/modprobe ext3
      BUILTIN_FS="iso9660 ext3 ext2 reiserfs vfat"
      # we need to use mountit to prevent NTFS to be mounted!
      if mountit $TARGET_DEV $TARGET "-o rw"
      then
        :
      else
        echo -n "${CRE} ${RED}Copying KNOPPIX CDROM failed. ${MAGENTA}$TARGET_DEV_DESC${RED} is not mountable.${NORMAL}"
	sleep 2
        return 1
      fi
      # check for enough free space
      USED_SPACE=0
      [ -f $TARGET/$KNOPPIX_DIR/$KNOPPIX_NAME ] && USED_SPACE=$(/usr/bin/du -s $TARGET/$KNOPPIX_DIR/$KNOPPIX_NAME | /usr/bin/gawk '{ print $1 }')
      FOUNDSPACE="$(/bin/df -k $TARGET | /usr/bin/tail -1 | /usr/bin/gawk '{ print $4+int('$USED_SPACE') }')"
   ;;
   *)
     return 1
   ;;
  esac
 
  # sanity check

  if [ $FOUNDSPACE -lt $SIZE ]
  then
    echo -n "${CRE} ${RED}Copying KNOPPIX CDROM failed. Not enough free space on ${MAGENTA}${TARGET_DEV_DESC}${RED}. Found: ${MAGENTA}${FOUNDSPACE}k${RED} Need: ${MAGENTA}${SIZE}k${RED} ${NORMAL}"
    sleep 2
    umount $TARGET
    return 1
  fi
 
  # do the real copy
  
  echo "${CRE} ${GREEN}Copying KNOPPIX CDROM to ${MAGENTA}$TARGET_DEV_DESC${GREEN}... Please be patient. ${NORMAL}"
  if [ -z "$use_cp" -a -x /usr/bin/rsync ]
  then 
    # first cp the small files
    /usr/bin/rsync -a --exclude="$KNOPPIX_DIR/$KNOPPIX_NAME" $COPY $TARGET # Copy Knoppix to $TARGET
    # then the big file with nice progress meter
    [ -f $TARGET/$KNOPPIX_DIR/$KNOPPIX_NAME ] && /bin/rm -f $TARGET/$KNOPPIX_DIR/$KNOPPIX_NAME
    /usr/bin/rsync -a --progress --include="$KNOPPIX_DIR/$KNOPPIX_NAME" --include="$KNOPPIX_DIR/" --exclude="*" $COPY $TARGET # Copy Knoppix to $TARGET
    #/usr/bin/rsync -avP $COPY $TARGET # Copy Knoppix to $TARGET
  else
    /bin/cp -a -f $COPY $TARGET # Copy Knoppix to $TARGET
  fi
  if [ $? -ne 0 ]
  then
    echo -n "${CRE} ${RED}Copying KNOPPIX CDROM failed. ${MAGENTA}$TARGET_DEV_DESC${RED} possibly has not enough space left.${NORMAL}"
    sleep 2
    return 1
  fi
  # remount r/o
  /bin/mount -n -o remount,ro $TARGET_DEV $TARGET
  remount_knoppix
}

mount_knoppix /cdrom

COPYTO=""
BOOTFROM=""
DO_REMOUNT=""
REAL_TARGET=""

case "$CMDLINE" in *toram*) DO_REMOUNT="yes"; COPYTO="ram"; ;; esac
case "$CMDLINE" in *tohd=*) DO_REMOUNT="yes"; COPYTO="hd"; ;; esac
case "$CMDLINE" in *bootfrom=*) DO_REMOUNT="yes"; BOOTFROM="yes" ;; esac
 
# Remount later after copying/isoloading/driverloading?
# pre-test if everything succeeded
if  test -n "$DO_REMOUNT"
then
  # copy library cache 
  cat /KNOPPIX/etc/ld.so.cache > /etc/ld.so.cache 
  echo "" 

  SOURCE="/cdrom"
  TARGET="/cdrom2"
 
  # first test for possible hdboot/fromiso (which can be combined with toram / tohd)
  if [ -n "$BOOTFROM" ]
  then
    boot_from
    if [ $? -eq 0 ]
    then
      # set new source / target paths
      REAL_TARGET="$TARGET"
      SOURCE2="$LOOP_SOURCE"
      SOURCE="/cdrom2"
      TARGET="/cdrom3"
    fi
  fi
  if [ -n "$COPYTO" -a -n "$FOUND_KNOPPIX" ]
  then
    copy_to $COPYTO && REAL_TARGET="$TARGET"
  fi
fi

# Final test if everything succeeded.
if test -n "$FOUND_KNOPPIX"
then
# copy library cache
cat /KNOPPIX/etc/ld.so.cache > /etc/ld.so.cache
echo ""

# Enable kernel messages
echo "6" > /proc/sys/kernel/printk

# Set paths
echo "${CRE}${BLUE}Setting paths...${NORMAL}"
PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/linuxrc2.d/bin:."
export PATH

# Debian weirdness
/KNOPPIX/bin/rm -f /etc/alternatives
/KNOPPIX/bin/cp -a /KNOPPIX/etc/alternatives /etc/ 2>>$log

# Replace /sbin
/KNOPPIX/bin/rm -f /sbin
/KNOPPIX/bin/ln -sf /KNOPPIX/sbin /sbin

# From here, we should have all essential commands available.
hash -r

# Did we remount the source media ? 
if  test -n "$REAL_TARGET"; 
then
   /bin/mount -n --move $REAL_TARGET /cdrom # move it back and go on to normal boot 
fi

# Clean up /etc/mtab (and - just in case - make a nice entry for looped ISO)
egrep " /KNOPPIX | /cdrom " /proc/mounts | sed 's|/dev/loop0 /cdrom \(.*\) 0 0|'$LOOP_SOURCE$ISO_PATH' /cdrom/ \1,loop=/dev/loop0 0 0|g' >> /etc/mtab

# Clean up /
rm -rf /modules /static

# New in Kernel 2.4.x: tempfs with variable ramdisk size.
# We check for available memory anyways and limit the ramdisks
# to a reasonable size.
FOUNDMEM="$(awk '/MemTotal/{print $2}' /proc/meminfo)"
TOTALMEM="$(awk 'BEGIN{m=0};/MemFree|Cached/{m+=$2};END{print m}' /proc/meminfo)"

if test -z "$TOTALMEM"; then
    callash "Can not check for available memory. Please exit to retry, or reset to quit."
fi

# Be verbose
echo "${CRE}${BLUE}Total memory found: ${YELLOW}${FOUNDMEM}${BLUE} kB${NORMAL}"

# Now we need to use a little intuition for finding a ramdisk size
# that keeps us from running out of space, but still doesn't crash the
# machine due to lack of Ram

# Minimum size of additional ram partitions
MINSIZE=2000
# At least this much memory minus 30% should remain when home and var are full.
MINLEFT=16000
# Maximum ramdisk size
MAXSIZE="$(expr $TOTALMEM - $MINLEFT)"
# Default ramdisk size for ramdisk
RAMSIZE="$(expr $TOTALMEM / 5)"

# Check for sufficient memory to mount extra ramdisk for /home + /var
if test -n "$TOTALMEM" -a "$TOTALMEM" -gt "$MINLEFT"; then
   test -z "$RAMSIZE" && RAMSIZE=1000000
   mkdir -p /ramdisk
   # tmpfs/varsize version, can use swap
   RAMSIZE=$(expr $RAMSIZE \* 4)

   if test "$RAMSIZE" -gt "100000"; then
      NR=$(expr $RAMSIZE \/ 4 + 50000)
   elif  test "$RAMSIZE" -gt "50000"; then
      NR=$(expr $RAMSIZE \/ 2 + 25000)
   else
      NR="$RAMSIZE"
   fi

   echo -n "${CRE}${BLUE}Creating ${YELLOW}/ramdisk${BLUE} (dynamic size=${RAMSIZE}k) on ${MAGENTA}shared memory${BLUE}...${NORMAL}"
   # We need /bin/mount here for the -o size= option
   /bin/mount -t tmpfs -o "size=${RAMSIZE}k,nr_inodes=${NR}" /ramdisk /ramdisk && mkdir -p /ramdisk/home /ramdisk/var && ln -s /ramdisk/home /ramdisk/var /
   echo "${BLUE}Done.${NORMAL}"
else
   mkdir -p /home /var
fi

# Set Timezone to Tokyo/Japan
rm -f /etc/localtime
cp -f /KNOPPIX/usr/share/zoneinfo/Asia/Tokyo /etc/localtime
hwclock --hctosys

cat /proc/mounts >/linuxrc.mounted

if checkbootparam mvetc; then
   cp -pr /etc /ramdisk/etc
   rm -rf /etc
   ln -s /ramdisk/etc /etc
fi

hash -r

# Clean up /
rm -rf /modules /static /root/lib

echo -n "${CRE}${BLUE}Creating directories and symlinks on ramdisk...${NORMAL}"
{
  # Create common WRITABLE (empty) dirs
  DO mkdir -p /var/run /var/backups /var/cache/apache /var/local /var/lock/news \
         /var/nis /var/preserve /var/state/misc /var/tmp /var/lib \
         /var/spool/cups/tmp /var/lib/samba \
         /mnt/cdrom /mnt/floppy /mnt/hd /mnt/test \
         /home/knoppix /root /etc/sysconfig /etc/X11
  DO chown knoppix.knoppix /home/knoppix
  # Create empty utmp and wtmp
  :> /var/run/utmp
  :> /var/run/wtmp
  # CUPS wants writable files. :-/
  if [ -d /KNOPPIX/etc/cups ]; then
     DO mkdir -p /etc/cups
     DO cp -a /KNOPPIX/etc/cups/*.conf /etc/cups/
  fi
  # resolv.conf must be writable as well
  if [ -f /KNOPPIX/etc/dhcpc/resolv.conf ]; then
     DO mkdir -p /etc/dhcpc
     DO cp -a /KNOPPIX/etc/dhcpc/resolv.conf /etc/dhcpc/
  fi
  # All files in here should be size zero after Knoppix.clean was run
  for dir in \
      /KNOPPIX/var/local /KNOPPIX/var/games /KNOPPIX/var/log \
      /KNOPPIX/var/spool \
      ; do
      [ -d $dir ] && DO cp -a $dir /var/
  done
  for dir in \
      /KNOPPIX/var/lib/games /KNOPPIX/var/lib/wine \
      /KNOPPIX/var/lib/nfs /KNOPPIX/var/lib/xkb /KNOPPIX/var/lib/isdn \
      /KNOPPIX/var/lib/kdm /KNOPPIX/var/lib/pcmcia \
      /KNOPPIX/var/lib/dhcp* \
      /KNOPPIX/var/lib/wnn \
      ; do
      [ -d $dir ] && DO cp -a $dir /var/lib/
  done
  # Link device files (real device file copies should NOT require more space, but in fact, they do)
  [ -d /dev/capi ] && DO cp -aus /dev/capi /dev/
  ln -s /KNOPPIX/dev/* /dev/ 2>>$log
  # Problematic directories in /var/lib (lots and lots of inodes)
  for dir in \
        /KNOPPIX/var/lib/dpkg /KNOPPIX/var/lib/apt /KNOPPIX/var/lib/doc-base \
        /KNOPPIX/var/lib/gnome /KNOPPIX/var/lib/kde \
        /KNOPPIX/var/lib/scrollkeeper /KNOPPIX/var/lib/texmf \
        ; do
     [ -d "$dir" ] && DO ln -s $dir /var/lib/
  done
  # Debian-apt
  [ -d /KNOPPIX/var/cache/apt ] && DO ln -s /KNOPPIX/var/cache/apt /var/cache/
  if [ -f /etc/dhcpc/resolv.conf ]; then
     DO rm -f /etc/resolv.conf
     DO ln -s /etc/dhcpc/resolv.conf /etc/
  fi
  for dir in \
        /KNOPPIX/etc/skel /KNOPPIX/etc/nessus \
        ; do
     [ -d "$dir" ] && DO ln -s $dir /etc/
  done
  # Index files can be HUGE, so better replace cache/man tree by links later
  # cp -a /KNOPPIX/var/cache/man /var/cache/ 2>>$log
  # Create links from CDROM for UNWRITABLE (remaining) files
  DO cp -aus /KNOPPIX/var/* /var/
  [ -z "$knoppix_rw" ] && DO cp -aus /KNOPPIX/etc/* /etc/
  # Make SURE that these are files, not links!
  for file in \
         /etc/ftpusers /etc/passwd /etc/shadow /etc/group \
         /etc/ppp /etc/isdn /etc/ssh \
         /etc/inittab /etc/network /etc/sudoers \
         /etc/dhcpc \
        ; do
     if [ -L $file -o -f $file ]; then
        [ -f /KNOPPIX$file ] && DO "rm -f $file; cp -a /KNOPPIX$file /etc/"
        [ -d /KNOPPIX$file ] && DO "rm -f $file; cp -a /KNOPPIX$file /etc/"
     fi
  done
  # Extremely important, init crashes on shutdown if this is only a link
  DO rm -f /etc/init
  DO rm -f /etc/ioctl.save
  DO rm -f /etc/pnm2ppa.conf
  DO cp -a /sbin/init /etc/
  DO ":> /etc/ioctl.save"
  DO ":> /etc/pnm2ppa.conf"
  # Must exist for samba to work
  [ -d /var/lib/samba ] && :> /var/lib/samba/unexpected.tdb
  # Diet libc bug workaround
} >>$log 2>&1
echo "${BLUE}Done.${NORMAL}"
echo End of Linuxrc. >/linuxrc.end

checkbootparam pause && /bin/sh

# Now tell kernel where the real modprobe lives
echo "/sbin/modprobe" > /proc/sys/kernel/modprobe

# Change root device from /dev/fd0 to /dev/ram0
echo "0x100" > /proc/sys/kernel/real-root-dev

   # move logs to /var/log/
   cp $log /var/log/rc.log
   rm -f /linuxrc.log
   rm -f /linuxrc.inc
   mkdir -p /var/log/linuxrc.stamps
   mv /linuxrc.* /var/log/linuxrc.stamps/.

   # Give control to patch procedure
   if checkbootparam linuxrc2; then
      for file in /cdrom2.loop/KNOPPIX/linuxrc2.d/linuxrc2 /cdrom/KNOPPIX/linuxrc2.d/linuxrc2 /linuxrc2.d/linuxrc2; do
          if test -x $file ; then
             echo "${CRE}${BLUE}$file $FOUND_KNOPPIX -- Call Extended Linuxrc procedure.${NORMAL}"
             $file $FOUND_KNOPPIX
             break;
          fi
      done
   fi
   # umount KNOPPIX CDROM
   if test -f /ramdisk/KNOPPIX/KNOPPIX; then
      echo umount /cdrom
      /bin/umount /cdrom
      rmdir /cdrom
      ln -s /ramdisk /cdrom # make a symlink and go on to normal boot
   fi

# Give control to the init process.
echo "${CRE}${BLUE}Starting init process.${NORMAL}"
rm -f /mounted_*
rm -f /linuxrc
rm -rf /linuxrc2.d
exit 0

else
   while true; do
      callash "${CRE}${RED}Can't find KNOPPIX filesystem, sorry. Please reset to quit.${NORMAL}"
   done
fi