#!/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.
#

# Just informational: This is a CD or DVD edition
MEDIUM="CD"

# 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.ko and g_NCR* cause a kernel Oops if no such adapter
# is present.
#
# NB: It looks like that ncr53c8xx.ko is more stable than 53c7,8xx.ko 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.ko on request (untested)
#SCSI_MODULES="aic7xxx.ko aic7xxx_old.ko BusLogic.ko \
#ncr53c8xx.ko NCR53c406a.ko \
#initio.ko mptscsih.ko \
#advansys.ko aha1740.ko aha1542.ko aha152x.ko \
#atp870u.ko dtc.ko eata.ko fdomain.ko gdth.ko \
#megaraid.ko pas16.ko pci2220i.ko pci2000.ko psi240i.ko \
#qlogicfas.ko qlogicfc.ko qlogicisp.ko \
#seagate.ko t128.ko tmscsim.ko u14-34f.ko ultrastor.ko wd7000.ko \
#a100u2w.ko 3w-xxxx.ko"
# Obsoleted by /proc/pci lookups

# Misc functions

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

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

# Dynamic program loader
# /KNOPPIX is already mounted when this is used.
DYNLOADER="/KNOPPIX/lib/ld-linux.so.2"

# Builin filesystems
BUILTIN_FS="iso9660 ext2 vfat"

mountit(){
# Usage: mountit src dst "options"
# Uses builtin mount of ash.knoppix
for fs in $BUILTIN_FS; do
test -b $1 && mount -t $fs $3 $1 $2 >/dev/null 2>&1 && return 0
done
return 1
}

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

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

# Reset fb color mode
RESET="]R"
# ANSI COLORS
# Erase to end of line
CRE="
"
# Clear and reset Screen
CLEAR="c"
# Normal color
NORMAL=""
# RED: Failure or error message
RED=""
# GREEN: Success message
GREEN=""
# YELLOW: Descriptions
YELLOW=""
# BLUE: System mesages
BLUE=""
# MAGENTA: Found devices or drivers
MAGENTA=""
# CYAN: Questions
CYAN=""
# BOLD WHITE: Hint
WHITE=""

# Clear screen with colormode reset
# echo "$CLEAR$RESET"
# echo "$CLEAR"
# Just go to the top of the screen
# echo -n ""
echo ""
# Be verbose
echo "${WHITE}Welcome to the ${CYAN}K${MAGENTA}N${YELLOW}O${WHITE}P${RED}P${GREEN}I${BLUE}X${WHITE} live Linux-on-DVD!${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

# Kernel 2.6
mount -t sysfs /sys /sys >/dev/null 2>&1

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

# 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
case "$CMDLINE" in *BOOT_IMAGE=debug\ *|*\ debug\ *) DEBUG="yes"; ;; esac
# Does the user want to skip scsi detection?
NOSCSI=""
case "$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
USB2="ehci-hcd.ko"
case "$CMDLINE" in *nousb2*) USB2=""; ;; 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. :-(
# NOTE: We don't need scsi-emulation anymore in Kernel 2.6.10 and up
#if test -n "$IDECD"; then
## Use ide-cd for ATAPI-only CD-Rom(s)
#$INSMOD /modules/scsi/ide-cd.ko >/dev/null 2>&1
#else
## Check for IDE-SCSI capable CD-Rom(s) first
#$INSMOD /modules/scsi/ide-scsi.ko >/dev/null 2>&1 
#fi

# Run a shell if in debug mode
stage=1
rundebugshell(){
if [ -n "$DEBUG" ]; then
echo "${CRE}${BLUE}Starting intermediate Shell stage $stage as requested by \"debug\" option.${NORMAL}"
echo "${CRE}${BLUE}Type \"exit\" to continue with normal bootup.${NORMAL}"
[ -x /static/ash ] && /static/ash || /bin/bash
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... ${NORMAL}"
umount /modules/scsi 2>/dev/null
echo "${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${NORMAL}"
if test -f /modules/scsi/$i && $INSMOD -f /modules/scsi/$i >/dev/null 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}"
}

# Check for SCSI, use modules on bootfloppy first
# Trying to do kind of /proc/pci hardware detection
PROCPCI="`cat /proc/pci 2>/dev/null`"
ISA_SCSI="aha1740.ko aha1542.ko aha152x.ko pas16.ko psi240i.ko qlogicfas.ko qlogicfc.ko seagate.ko t128.ko u14-34f.ko wd7000.ko"
SCSI_PROBE="$ISA_SCSI"
case "$PROCPCI" in *[Aa][Ii][Cc]-*|*[Aa][Hh][Aa]-*) SCSI_PROBE="$SCSI_PROBE aic7xxx.ko" ;; esac
case "$PROCPCI" in *[Bb][Uu][Ss][Ll][Oo][Gg][Ii][Cc]*) SCSI_PROBE="$SCSI_PROBE BusLogic.ko" ;; esac
case "$PROCPCI" in *[Tt][Rr][Mm]-[Ss]1040*|*[Dd][Cc]395*|*[Dd][Cc]315*) SCSI_PROBE="$SCSI_PROBE dc395x.ko" ;; esac
case "$PROCPCI" in *53[Cc]8*) SCSI_PROBE="$SCSI_PROBE sym53c8xx.ko" ;; esac
case "$PROCPCI" in *53[Cc]406*) SCSI_PROBE="$SCSI_PROBE NCR53c406a.ko" ;; esac
case "$PROCPCI" in *[Ii][Nn][Ii][Tt][Ii][Oo]\ *|*[Ii][Nn][Ii]-[Aa]100[Uu]2[Ww]*) SCSI_PROBE="$SCSI_PROBE initio.ko" ;; esac
case "$PROCPCI" in *[Mm][Pp][Tt]*[Ss][Cc][Ss][Ii]*) SCSI_PROBE="$SCSI_PROBE mptscsih.ko" ;; esac
case "$PROCPCI" in *[Aa][Dd][Vv][Aa][Nn][Cc][Ee][Dd]\ [Ss][Yy][Ss]*) SCSI_PROBE="$SCSI_PROBE advansys.ko" ;; esac
case "$PROCPCI" in *[Aa][Tt][Pp]8*|*[Aa][Ee][Cc]6*) SCSI_PROBE="$SCSI_PROBE atp870u.ko" ;; esac
case "$PROCPCI" in *[Dd][Tt][Cc]*) SCSI_PROBE="$SCSI_PROBE dtc.ko" ;; esac
case "$PROCPCI" in *[Ee][Aa][Tt][Aa]*) SCSI_PROBE="$SCSI_PROBE eata.ko" ;; esac
case "$PROCPCI" in *[Ff]*[Dd][Oo][Mm][Aa][Ii][Nn]*) SCSI_PROBE="$SCSI_PROBE fdomain.ko" ;; esac
case "$PROCPCI" in *[Gg][Dd][Tt]\ *) SCSI_PROBE="$SCSI_PROBE gdth.ko" ;; esac
case "$PROCPCI" in *[Mm][Ee][Gg][Aa][Rr][Aa][Ii][Dd]*) SCSI_PROBE="$SCSI_PROBE megaraid.ko" ;; esac
case "$PROCPCI" in *[Pp][Cc][Ii]-22*) SCSI_PROBE="$SCSI_PROBE pci2220i.ko" ;; esac
case "$PROCPCI" in *[Pp][Cc][Ii]-2000*) SCSI_PROBE="$SCSI_PROBE pci2000.ko" ;; esac
case "$PROCPCI" in *[Qq][Ll][Oo][Gg][Ii][Cc]*) SCSI_PROBE="$SCSI_PROBE qlogicisp.ko" ;; esac
case "$PROCPCI" in *53[Cc]974*) SCSI_PROBE="$SCSI_PROBE tmscsim.ko" ;; esac
case "$PROCPCI" in *[Uu][Ll][Tt][Rr][Aa][Ss][Tt][Oo][Rr]*) SCSI_PROBE="$SCSI_PROBE ultrastor.ko" ;; esac
case "$PROCPCI" in *3[Ww][Aa][Rr][Ee]*) SCSI_PROBE="$SCSI_PROBE 3w-xxxx.ko" ;; esac

if test -n "$INTERACTIVE"; then
# Let the user select interactively
askmodules SCSI $(cd /modules/scsi; echo *.ko)
else
# these are the autoprobe-safe modules
MODULES="$SCSI_PROBE"
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.ko >/dev/null 2>&1 && $INSMOD silraid.ko >/dev/null 2>&1 ; } || $INSMOD medley.ko >/dev/null 2>&1 || $INSMOD pdcraid.ko >/dev/null 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.ko 2>/dev/null; then
$INSMOD /modules/scsi/usbcore.ko >/dev/null 2>&1
FOUNDUSB=""

for i in $USB2 uhci-hcd ohci-hcd; do
test -f /modules/scsi/$i.ko && $INSMOD /modules/scsi/$i.ko >/dev/null 2>&1 && FOUNDUSB="yes"
done
if test -n "$FOUNDUSB"; then
test -f /modules/scsi/ub.ko && $INSMOD /modules/scsi/ub.ko >/dev/null 2>&1
test -f /modules/scsi/usb-storage.ko && $INSMOD /modules/scsi/usb-storage.ko >/dev/null 2>&1
else
# For an unknown reason, unloading usbcore hangs sometimes
# rmmod usbcore >/dev/null 2>&1
true
fi
fi
echo -n "${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.ko; then
echo -n "${CRE}${BLUE}Loading ieee1394...${NORMAL}"
$INSMOD /modules/scsi/ieee1394.ko >/dev/null 2>&1
FOUNDFIREWIRE=""
for i in ohci1394.ko; do
echo -n "${CRE}${BLUE}Loading $i...${NORMAL}"
test -f /modules/scsi/$i && $INSMOD /modules/scsi/$i >/dev/null 2>&1 && FOUNDFIREWIRE="yes"
done
if test -n "$FOUNDFIREWIRE"; then
echo -n "${CRE}${BLUE}Loading sbp2.ko...${NORMAL}"
test -f /modules/scsi/sbp2.ko && $INSMOD /modules/scsi/sbp2.ko serialize_io=1 >/dev/null 2>&1
else
# For an unknown reason, unloading ieee1394 hangs smetimes
# echo -n "${CRE}${BLUE}Unloading ieee1394...${NORMAL}"
# rmmod ieee1394 >/dev/null 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>/dev/null)" 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 $id 0" >/proc/scsi/scsi 2>/dev/null; done; done; done ;; esac
fi
sleep 6
echo "${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 $(cd /modules/scsi; echo *.ko)
test -n "$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 *\ dma*)
for d in $(cd /proc/ide 2>/dev/null && echo hd[a-z]); do
if test -d /proc/ide/$d; then
MODEL="$(cat /proc/ide/$d/model 2>/dev/null)"
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

stage=1
rundebugshell

# 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?? $DEVICES"
test -n "$FOUNDUSB$FOUNDFIREWIRE" -a -z "$NOCD" && DEVICES="/dev/sr? $DEVICES"
# New: Also try parallel port CD-Roms [for Mike].
DEVICES="$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/ub?[1-9] /dev/ub?[1-9][0-9] /dev/ub? /dev/hd?[1-9] /dev/hd?[1-9][0-9]"
case "$CMDLINE" in *fromhd=/dev/*) DEVICES="$fromhd"; ;; esac
for i in $DEVICES
do
echo -n "${CRE}${BLUE}Looking for ${MEDIUM} in: ${MAGENTA}$i${NORMAL}   "
if mountit $i /cdrom "-o ro" >/dev/null 2>&1
then
if test -f /cdrom/$KNOPPIX_DIR/$KNOPPIX_NAME
then
echo -n "${CRE} ${GREEN}Accessing KNOPPIX ${MEDIUM} at ${MAGENTA}$i${GREEN}...${NORMAL}"
FOUND_KNOPPIX="$i"
break
fi
umount /cdrom
fi
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.ko file="$1/$KNOPPIX_DIR/$KNOPPIX_NAME"
  #  accelerated-knoppix : cloop-opt.ko
  echo "6" > /proc/sys/kernel/printk
#  THREAD="thread_mode=1"
  THREAD="thread_mode=0"
  CHKBLK="0"
  for i in $CMDLINE; do 
   case "$i" in chkblk=*|CHKBLK=*) eval $i; [ -n "$chkblk" ] && CHKBLK="$chkblk" ;; esac
   case "$i" in *noclpthread*|*NOCLPTHREAD*) THREAD="" ;; esac
  done
  echo ""
  $INSMOD -f /modules/cloop.ko chkblks=$CHKBLK "$THREAD" file="$1/$KNOPPIX_DIR/$KNOPPIX_NAME"
  echo "0" > /proc/sys/kernel/printk

  mountit /dev/cloop /KNOPPIX "-o ro" || FOUND_KNOPPIX=""
  # Allow multi-image KNOPPIX mounts
  if [ -n "$FOUND_KNOPPIX" -a -x "$DYNLOADER" -a -x /KNOPPIX/sbin/losetup ]; then
#   echo ""
   echo -n "${CRE} ${GREEN}Found primary KNOPPIX compressed image at ${MAGENTA}$1/$KNOPPIX_DIR/$KNOPPIX_NAME${GREEN}.${NORMAL}"
   for c in 1 2 3 4 5 6 7; do
    if [ -f "$1/$KNOPPIX_DIR/$KNOPPIX_NAME$c" ]; then
     if "$DYNLOADER" --library-path /KNOPPIX/lib /KNOPPIX/sbin/losetup "/dev/cloop$c" "$1/$KNOPPIX_DIR/$KNOPPIX_NAME$c"; then
      if "$DYNLOADER" --library-path /KNOPPIX/lib /KNOPPIX/bin/mkdir -p "/KNOPPIX$c"; then
       if mountit "/dev/cloop$c" "/KNOPPIX$c" "-o ro"; then
        echo ""
        echo -n "${CRE} ${GREEN}Found additional KNOPPIX compressed image at ${MAGENTA}$1/$KNOPPIX_DIR/$KNOPPIX_NAME$c${GREEN}.${NORMAL}"
       else
        "$DYNLOADER" --library-path /KNOPPIX/lib /KNOPPIX/bin/rmdir "/KNOPPIX$c" 2>/dev/null
       fi
      else
       "$DYNLOADER" --library-path /KNOPPIX/lib /KNOPPIX/bin/losetup -d "/dev/cloop$c" 2>/dev/null
      fi
     fi
    fi
   done
  fi
 fi
}

remount_knoppix()
{
  if test -f $TARGET/$KNOPPIX_DIR/$KNOPPIX_NAME; then
    umount /KNOPPIX # unmount it
    echo "$RMMOD cloop" | /static/ash # release CD - ash crashes with parts of libc in memory -- FF
    umount $SOURCE  # unmount CD
    [ -n "$SOURCE2" ] && umount $SOURCE2  # 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 | /usr/bin/gawk -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
  /KNOPPIX/sbin/modprobe reiserfs
  /KNOPPIX/sbin/modprobe ext3
  /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
     /KNOPPIX/sbin/modprobe loop

     /bin/mount -o ro $LOOP_DEV $LOOP_SOURCE || 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
  fi
  if [ $? -ne 0 ]
  then
     [ -n "$LOOP_SOURCE" ] && /bin/umount $LOOP_SOURCE
     echo -n "${CRE} ${RED}Accessing KNOPPIX ${MEDIUM} 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 ${MEDIUM} at ${MAGENTA}$TARGET_DEV${GREEN}...${NORMAL}"
  else
    echo -n "${CRE} ${RED}Accessing KNOPPIX ${MEDIUM} 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 ${MEDIUM} 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 ${MEDIUM} 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 ${MEDIUM} 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 ${MEDIUM} 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
}

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

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
 
#
# accelerated-knoppix : cloop blocks readahead
#
if test -z "$DO_REMOUNT" -a -n "$FOUND_KNOPPIX" ; then
  if test -x /accel/cloopreadahead ; then
    CLOOPREADAHEAD="yes";
    case "$CMDLINE" in *nocbr*|*NOCBR*) CLOOPREADAHEAD=""; ;; esac
    if test -n "$CLOOPREADAHEAD" -a -f /cdrom/${KNOPPIX_DIR}/${KNOPPIX_NAME}.boot.lst ; then
      echo ""
      echo -n " ${GREEN}Reading cloop blocks....${BLUE}(Backgrounding)${NORMAL}"
#      /accel/cloopreadahead /cdrom/$KNOPPIX_DIR/$KNOPPIX_NAME /cdrom/${KNOPPIX_DIR}/${KNOPPIX_NAME}.boot.lst > /dev/null 2>&1 &
      /accel/cloopreadahead /cdrom/$KNOPPIX_DIR/$KNOPPIX_NAME /cdrom/${KNOPPIX_DIR}/${KNOPPIX_NAME}.boot.lst > /.cloopreadahead.log 2>&1 &
    fi
  fi
fi

mount_knoppix /cdrom

# Remount later after copying/isoloading/driverloading?
# pre-test if everything succeeded
if  test -n "$DO_REMOUNT" -a -n "$FOUND_KNOPPIX"
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" ]
  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 ""

UNIONFS=""
$INSMOD /modules/unionfs.ko 2>/dev/null && UNIONFS="yes"

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

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

# Make space: We don't need the modules anymore from here.
/KNOPPIX/bin/rm -rf /modules

# Debian weirdness
/KNOPPIX/bin/cp -a /KNOPPIX/etc/alternatives /etc/ 2>/dev/null

# 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 /
/KNOPPIX/bin/rm -rf /modules /static

# New in Kernel 2.4.x: tmpfs with variable ramdisk size.
# We check for available memory anyways and limit the ramdisks
# to a reasonable size.
FOUNDMEM="$(/usr/bin/gawk '/MemTotal/{print $2}' /proc/meminfo)"
TOTALMEM="$(/usr/bin/gawk 'BEGIN{m=0};/MemFree|Cached/{m+=$2};END{print m}' /proc/meminfo)"
 
# 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=20000
# 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)"

# Create additional dynamic ramdisk.
test -z "$RAMSIZE" -o "$RAMSIZE" -lt "$MINSIZE" && RAMSIZE="$MINSIZE"
mkdir -p /ramdisk
# tmpfs/varsize version, can use swap
RAMSIZE=$(expr $RAMSIZE \* 4)
echo -n "${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" /ramdisk /ramdisk 
mkdir -p /ramdisk/tmp /ramdisk/home/knoppix && chmod 1777 /ramdisk/tmp && chown knoppix.knoppix /ramdisk/home/knoppix && ln -snf /ramdisk/home /home && mv /tmp /tmp.old && ln -s /ramdisk/tmp /tmp && rm -rf /tmp.old
echo "${BLUE}Done.${NORMAL}"

stage=2
rundebugshell

echo -n "${CRE}${BLUE}Creating unionfs and symlinks on ramdisk...${NORMAL}"
mkdir -p /UNIONFS
UNION="/ramdisk=rw"
# Add all KNOPPIX images to the union
for c in "" 1 2 3 4 5 6 7; do
 [ -d "/KNOPPIX$c" ] && UNION="$UNION:/KNOPPIX$c=ro"
done
# Do the actual mount
if test -n "$UNIONFS" && /bin/mount -t unionfs -o "dirs=$UNION,delete=whiteout" /UNIONFS /UNIONFS; then
 # We now have unionfs, copy some data from the initial ramdisk first
 cp -a /etc/fstab /etc/auto.mnt /etc/filesystems /etc/mtab /UNIONFS/etc/
 for i in bin boot dev etc sbin var lib opt root usr; do # Move directories to unionfs
  if test -d /$i; then
   mv /$i /$i.old && \
   /KNOPPIX/lib/ld-linux.so.2 --library-path /KNOPPIX/lib /KNOPPIX/bin/ln -snf /UNIONFS/$i /$i && \
   rm -rf /$i.old
  else
   ln -snf /UNIONFS/$i /$i
  fi
 done
 for i in $(cd /UNIONFS; echo *);do # Create links for new stuff on /UNIONFS
   test "$i" = "home" -o "$i" = "tmp" && continue
   test -L "/$i" || test -d "/$i" || test -f "/$i" || ln -snf "/UNIONFS/$i" /$i
 done
else
 echo -n "${CRE}${RED}ERROR: CANNOT UNITE READ-ONLY MEDIA AND INITIAL RAMDISK!${NORMAL}"
 /KNOPPIX/sbin/halt -f -n
fi

echo ""
echo "${GREEN}>> Read-only ${MEDIUM} system successfully merged with read-write /ramdisk.${NORMAL}"
chown knoppix.knoppix /home/knoppix
# CUPS wants writable files. :-/
cp -a /KNOPPIX/etc/cups/*.conf /etc/cups/ 2>/dev/null
# resolv.conf must be writable as well
cp -a /KNOPPIX/etc/dhcpc/resolv.conf /etc/dhcpc/ 2>/dev/null
# Create empty utmp and wtmp
:> /var/run/utmp
:> /var/run/wtmp
# Make SURE that these are files, not links!
rm -rf /etc/ftpusers /etc/passwd /etc/shadow /etc/gshadow /etc/group \
       /etc/ppp /etc/isdn /etc/ssh /etc/ioctl.save \
       /etc/inittab /etc/network /etc/sudoers \
       /etc/init /etc/localtime /etc/dhcpc /etc/pnm2ppa.conf 2>/dev/null
cp -a /KNOPPIX/etc/ftpusers /KNOPPIX/etc/passwd /KNOPPIX/etc/shadow /etc/gshadow /KNOPPIX/etc/group \
      /KNOPPIX/etc/ppp /KNOPPIX/etc/isdn /KNOPPIX/etc/ssh \
      /KNOPPIX/etc/inittab /KNOPPIX/etc/network /KNOPPIX/etc/sudoers \
      /KNOPPIX/sbin/init /KNOPPIX/etc/dhcpc /etc/ 2>/dev/null
# Extremely important, init crashes on shutdown if this is only a link
:> /etc/ioctl.save
:> /etc/pnm2ppa.conf
# Must exist for samba to work
[ -d /var/lib/samba ] && :> /var/lib/samba/unexpected.tdb
# Kernel 2.6.9 bug?
chmod 1777 /tmp /var/tmp
# Diet libc bug workaround
/bin/cp -f /KNOPPIX/etc/localtime /etc/localtime
echo "${BLUE}Done.${NORMAL}"

# Mount devpts
# mount -t devpts /dev/pts /dev/pts 2>/dev/null

# Clean up /etc/mtab (and - just in case - make a nice entry for looped ISO)
/bin/egrep " /KNOPPIX[0-9]* | /cdrom " /proc/mounts | sed 's|/dev/loop0 /cdrom \(.*\) 0 0|'$LOOP_SOURCE$ISO_PATH' /cdrom/ \1,loop=/dev/loop0 0 0|g' >> /etc/mtab

# 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

stage=3
rundebugshell

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

else
echo "${CRE}${RED}Can't find KNOPPIX filesystem, sorry.${NORMAL}"
echo "${RED}Dropping you to a (very limited) shell.${NORMAL}"
echo "${RED}Press reset button to quit.${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
exec /static/ash
fi