#!/static/sh
# Filename: /linuxrc
# Purpose:  minirt for kernel 2.6
# Authors:  (c) Klaus Knopper <knoppix@knopper.net>, (c) Michael Prokop <mika@grml.org>
# Latest change: Die Apr 19 11:44:14 CEST 2005 [mika]
#######################################################################################

# 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

# Misc functions
INSMOD="insmod"
[ -x /modules/insmod ] && INSMOD="/modules/insmod"

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

# Builin filesystems
#BUILTIN_FS="iso9660 ext2 ext3 reiserfs vfat reiser4"
BUILTIN_FS="iso9660 ext2 vfat"

mountit(){
# Usage: mountit src dst "options"
# Uses builtin mount of ash.grml
  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_GRML=""
INTERACTIVE=""

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

# 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 >/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)"

# Simple shell grep
stringinfile(){
  case "$(cat $2)" in *$1*) return 0;; esac
  return 1
}

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

# Reread boot command line; echo last parameter's argument or return false.
getbootparam(){
  stringinstring " $1=" "$CMDLINE" || return 1
  result="${CMDLINE##*$1=}"
  result="${result%%[   ]*}"
  echo "$result"
  return 0
}

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

if checkbootparam "nocolor" ; then
  echo "Disabling colors in bootsequence as requested on commandline."
  # Reset fb color mode
  RESET="]R"
  # ANSI COLORS
  # Erase to end of line
  CRE="
"
  # Clear and reset Screen
  CLEAR="c"
else
  # 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=""
fi

# helper functions {{{
#log_success_msg () {
#  echo " * $@"
#}

log_failure_msg () {
  echo " ${RED}*${NORMAL} $@"
}

#log_warning_msg () {
# echo " ${BLUE}*${NORMAL} $@"
#}

# int log_begin_message (char *message)
log_begin_msg () {
  echo -n " ${GREEN}*${NORMAL} $@"
}

# int log_end_message (int exitstatus)
SUCCESS=" ${BLUE}[ ${GREEN}ok ${BLUE}]${NORMAL}"
FAILED=" ${NORMAL}[${RED}fail${NORMAL}]"
# }}}

# 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 ${CYAN}G${YELLOW}R${WHITE}M${RED}L${WHITE}!${NORMAL}"
#echo ""
#echo ""

echo "${WHITE}Welcome to"
echo ""
echo "${RED}   ____ ____  __  __ _     "
echo "${RED}  / ___|  _ \|  \/  | |    "
echo "${RED} | |  _| |_) | |\/| | |    "
echo "${RED} | |_| |  _ <| |  | | |___ "
echo "${RED}  \____|_| \_\_|  |_|_____|"
echo ""
echo "${WHITE}grml.org - Linux for users of texttools and sysadmins."
echo "${NORMAL}"

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

umask 022

# 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 "$CMDLINE" in *BOOT_IMAGE=debug\ *|*\ debug\ *) DEBUG="yes"; ;; esac
case "$CMDLINE" in *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

GRML_DIR="GRML"
GRML_NAME="GRML"
case "$CMDLINE" in *grml_dir=*) GRML_DIR="$grml_dir"; ;; esac
case "$CMDLINE" in *grml_name=*) GRML_NAME="$grml_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.ko >/dev/null 2>&1
#$INSMOD /modules/scsi/ide-cd.ko
#else
# Check for IDE-SCSI capable CD-Rom(s) first
#$INSMOD /modules/scsi/ide-scsi.ko >/dev/null 2>&1 
#$INSMOD /modules/scsi/ide-scsi.ko
#fi

# Run a shell if in debug mode
# echo "${BLUE}Dropping you to a busybox shell for debugging.${NORMAL}"
stage=1
rundebugshell(){
  if [ -n "$DEBUG" ]; then
  echo "${CRE}${BLUE}Starting intermediate shell stage $stage as requested by \"debug\" option.${NORMAL}"
  echo "${CRE}${BLUE}Just exit the shell to continue boot process...${NORMAL}"
  [ -x /static/sh ] && /static/sh || /bin/bash
fi
}

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

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

# Ask user for modules
askmodules(){
TYPE="$1"; shift
echo "${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 "Load ${TYPE} Modules?"
echo "[Enter full filename(s) (space-separated), Return for autoprobe, n for none] "
echo -n "insmod module(s)> "
read MODULES
case "$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}Probing ${TYPE}... ${WHITE}$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"
ISA_SCSI="aha1740.o aha1542.o aha152x.o pas16.o psi240i.o qlogicfas.o qlogicfc.o seagate.o t128.o u14-34f.o wd7000.o"
SCSI_PROBE="$ISA_SCSI"
case "$PROCPCI" in *[Aa][Ii][Cc]-*|*[Aa][Hh][Aa]-*) SCSI_PROBE="$SCSI_PROBE aic7xxx.o" ;; esac
case "$PROCPCI" in *[Bb][Uu][Ss][Ll][Oo][Gg][Ii][Cc]*) SCSI_PROBE="$SCSI_PROBE BusLogic.ko" ;; esac
case "$PROCPCI" in *53[Cc]8*) SCSI_PROBE="$SCSI_PROBE ncr53c8xx.o" ;; esac
#case "$PROCPCI" in *53[Cc]9*) SCSI_PROBE="$SCSI_PROBE NCR53C9x.ko" ;; esac
case "$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
# modules/scsi/3w-9xxx.ko
# modules/scsi/a100u2w.ko
# modules/scsi/aic7xxx_old_CAUTION.ko

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

## test -z "$NOSCSI" && \
if checkbootparam scsi ; then
  MODULE="$(getbootparam 'scsi' 2>/dev/null)"
  if test "$MODULE" = "probe" ; then
    echo "Bootoption scsi=probe found. Trying to autoprobe SCSI modules:" && \
    loadmodules SCSI $MODULES
  else
    [ -n "$MODULE" ] || echo "${RED}Neither a specific module nor option probe for SCSI module given. Skipping.${NORMAL}"
    [ -n "$MODULE" ] && echo "Trying to load module ${WHITE}${MODULE}${NORMAL}." && \
    /modules/insmod "/modules/scsi/${MODULE}.ko"
  fi
fi
#
#if checkbootparam module ; then
#  MODULE="$(getbootparam 'module' 2>/dev/null)"
#  # ehci-hcd ieee1394 ohci1394 ohci-hcd sbp2 uhci-hcd usbcore usb-storage
#  [ -n "$MODULE" ] && echo "${BLUE}Trying to load module ${MAGENTA}${MODULE}${BLUE}.${NORMAL}" && \
#  /modules/insmod "/modules/div/${MODULE}.ko"
#fi

#test -z "$NOSCSI" &&  \
#/static/discover --disable-bus all --enable-bus scsi --type bridge --normalize-whitespace --data-path=linux/module/name --data-version=`uname -r` | grep -v '^ $' | uniq
#echo "pci:"
#/static/discover --disable-bus all --enable-bus pci --type bridge --normalize-whitespace --data-path=linux/module/name --data-version=`uname -r` | grep -v '^ $' | uniq
#echo "End of Debugging SCSI"
#
#echo "Commands are:"
#echo "
#/static/discover --disable-bus all --enable-bus scsi --type bridge --normalize-whitespace --data-path=linux/module/name --data-version=\`uname -r\` | grep -v '^ $' | uniq
#/static/discover --disable-bus all --enable-bus pci --type bridge --normalize-whitespace --data-path=linux/module/name --data-version=\`uname -r\` | grep -v '^ $' | uniq
#"
#echo "Starting ash:"
#/static/ash
#echo "End of starting ash"

# 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}Checking for for USB..."
if test -f /modules/div/usbcore.ko; then
$INSMOD /modules/div/usbcore.ko >/dev/null 2>&1
FOUNDUSB=""

for i in $USB2 usb-uhci.ko usb-ohci.ko; do
test -f /modules/div/$i && $INSMOD /modules/div/$i >/dev/null 2>&1 && FOUNDUSB="yes"
done
if test -n "$FOUNDUSB"; then
test -f /modules/div/usb-storage.ko && $INSMOD /modules/div/usb-storage.ko >/dev/null 2>&1
else
# For an unknown reason, unloading usbcore hangs smetimes
# rmmod usbcore >/dev/null 2>&1
true
fi
fi
echo -n "${CRE}"
fi
# End of USB check

# Check for Firewire, use modules on bootfloppy first
if test -z "$NOFIREWIRE"; then
echo -n "${CRE}Checking for Firewire..."
if test -f /modules/div/ieee1394.ko; then
echo -n "${CRE}Loading ieee1394..."
$INSMOD /modules/div/ieee1394.ko >/dev/null 2>&1
FOUNDFIREWIRE=""
for i in ohci1394.ko; do
echo -n "${CRE}Loading $i..."
test -f /modules/div/$i && $INSMOD /modules/div/$i >/dev/null 2>&1 && FOUNDFIREWIRE="yes"
done
if test -n "$FOUNDFIREWIRE"; then
echo -n "${CRE}Loading sbp2.ko..."
test -f /modules/scsi/sbp2.ko && $INSMOD /modules/scsi/sbp2.ko sbp2_serialize_io=1 >/dev/null 2>&1
else
# For an unknown reason, unloading ieee1394 hangs smetimes
# echo -n "${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
log_begin_msg "Scanning for USB/Firewire devices."
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 "  $SUCCESS"
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 *\ nodma*) ;; *)
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]"
log_begin_msg "Enabling DMA acceleration for: ${MAGENTA}$d 	${YELLOW}[${MODEL}]${NORMAL}"
echo "using_dma:1" >/proc/ide/$d/settings && echo ""
fi
done
;;
esac

stage=2
rundebugshell
echo "before NFS"
for i in $cmdline; do case "$i" in nfsdir=*|NFSDIR=*) eval $i;; esac; done
[ -n "$nfsdir" ] && NFS="$nfsdir"
echo "nfsdir=$NFS"
# NFS
if [ -n "$NFS" ]; then
  tmp_="$(getbootparam nfsdir)"
  echo -n "checkbootparam nfsdir   "
  checkbootparam "nfsdir" && echo "OK" || echo "FAILED"
  echo "getbootparam nfsdir=\"$tmp_\""

  # put the mylibs into /lib for discover and udhcpc
  cdir

  # starting hw-detection for network card
  echo "Starting hw-detection"
  kernel_version_=`uname -r`
  modules_to_load=$(/static/discover --disable-bus all --enable-bus pci --type network --normalize-whitespace --data-path=linux/module/name --data-version=$kernel_version_ | grep -v '^ $' | uniq)
  echo "trying to load the following network modules:  \"$modules_to_load\""
  
  # FIXME modprobe is buggy from busybox
  modules_to_load=`echo $modules_to_load | xargs`
  modLoad()
  {
    for mod in $@ ; do
      tmp_="`modprobe -vn $mod`"
      if [ $? -ne 0 ]; then
        continue
      fi
      eval "$tmp_"
    done
  }
  modLoad "$modules_to_load"

  # loading additional modules
  modLoad sunrpc lockd af_packet nfs

  /static/udhcpc --foreground --quit --script=/static/udhcp-config.sh
  #echo "press <enter> to start a system shell and configure your system"
  #sh

  # recreate the old dir structures
  rdir
  #rm -rf /myusr /mylib

  log_begin_msg "${RED}Debug: NFS = ${NFS}${NORMAL}"
  log_begin_msg -n "${CRE}${BLUE}Looking for GRML in: ${MAGENTA}$NFS${NORMAL}   "
  if mount -t nfs "$NFS" -o "async,ro,nolock" /cdrom #>/dev/null 2>&1
    then
    if test -f /cdrom/$GRML_DIR/$GRML_NAME
      then
      log_begin_msg -n "${CRE} ${GREEN}Accessing grml CDROM at ${MAGENTA}$NFS${GREEN}...${NORMAL}"
      FOUND_GRML="$NFS"
      break
    fi
  fi
fi
echo "after NFS"


# Now that the right SCSI driver is (hopefully) loaded, try to find CD-ROM
if test -z $NFS ; then
  DEVICES="/dev/hd?"
  test -n "$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 GRML/GRML 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"; ;; esac
  for i in $DEVICES
  do
  log_begin_msg "${CRE} ${GREEN}*${NORMAL} Looking for CD-ROM in:    ${MAGENTA}$i${NORMAL}"
  if mountit $i /cdrom "-o ro" >/dev/null 2>&1
    then
    echo "  $SUCCESS"
    if test -f /cdrom/$GRML_DIR/$GRML_NAME
      then
      log_begin_msg "Accessing grml CD-ROM at: ${MAGENTA}$i${NORMAL}" ; echo "  $SUCCESS"
      FOUND_GRML="$i"
      break
    fi
    umount /cdrom
  fi
  done
fi

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

mount_grml()
{
  if test -n "$FOUND_GRML" -a -f $1/$GRML_DIR/$GRML_NAME; then
    # DEBUG
    # echo "6" > /proc/sys/kernel/printk
    # cloop:
    #$INSMOD -f /modules/cloop.ko file=$1/$GRML_DIR/$GRML_NAME
    #mountit /dev/cloop /GRML "-o ro" || FOUND_GRML=""
    # squashfs:
    #losetup /dev/loop0 $1/$GRML_DIR/$GRML_NAME
    mount -t squashfs $1/$GRML_DIR/$GRML_NAME /GRML -o loop,ro || FOUND_GRML=""
  fi

#    COMP=""
#    case $(dd if=$1/$KNOPPIX_DIR/$KNOPPIX_NAME bs=4 count=1 2>/dev/null) in
#      "#!/b") COMP=cloop
#              $INSMOD /modules/cloop.o file=$1/$KNOPPIX_DIR/$KNOPPIX_NAME
#              mountit /dev/cloop /KNOPPIX "-o ro" || FOUND_KNOPPIX=""
#              ;;
#      "hsqs") COMP=squashfs
#              mount -t squashfs $1/$KNOPPIX_DIR/$KNOPPIX_NAME /KNOPPIX -o loop,ro || FOUND_KNOPPIX=""
#              #losetup /dev/loop0 $1/$KNOPPIX_DIR/$KNOPPIX_NAME
#              #mount -t squashfs /dev/loop0 /KNOPPIX -o loop,ro || FOUND_KNOPPIX=""
#              ;;
#    esac
}

remount_grml()
{
  if test -f $TARGET/$GRML_DIR/$GRML_NAME; then
    umount /GRML # unmount it
    # echo "$RMMOD cloop" | /static/sh # release CD - ash crashes with parts of libc in memory -- FF
    umount $SOURCE  # unmount CD
    [ -n "$SOURCE2" ] && umount $SOURCE2  # umount possible loop-device
    mount_grml $TARGET
  else
    echo "${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
  # /GRML/sbin/modprobe reiserfs
  /GRML/sbin/modprobe reiser4
  /GRML/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
     /GRML/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 grml CD-ROM failed. ${MAGENTA}$TARGET_DEV${RED} is not mountable.${NORMAL}"
     sleep 2
     return 1
  fi
  
  if [ -f $TARGET/$GRML_DIR/$GRML_NAME ]
  then
    log_begin_msg "Accessing grml CD-ROM at ${MAGENTA}$TARGET_DEV${NORMAL}." ; echo $SUCCESS
  else
    echo -n "${CRE} ${RED}Accessing grml CD-ROM failed. Could not find $GRML_DIR/$GRML_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_grml
}

copy_to()
{
  # preparations
  /bin/mkdir $TARGET
  COPY="$SOURCE/$GRML_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
      # /GRML/sbin/modprobe reiserfs
      # /GRML/sbin/modprobe jbd
      # /GRML/sbin/modprobe ext3
      /GRML/sbin/modprobe reiser4
      BUILTIN_FS="iso9660 ext3 ext2 reiserfs reiser4 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 grml CD-ROM failed. ${MAGENTA}$TARGET_DEV_DESC${RED} is not mountable.${NORMAL}"
	sleep 2
        return 1
      fi
      # check for enough free space
      USED_SPACE=0
      [ -f $TARGET/$GRML_DIR/$GRML_NAME ] && USED_SPACE=$(/usr/bin/du -s $TARGET/$GRML_DIR/$GRML_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 grml CD-ROM 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 grml CD-ROM 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="$GRML_DIR/$GRML_NAME" $COPY $TARGET # Copy grml to $TARGET
    # then the big file with nice progress meter
    [ -f $TARGET/$GRML_DIR/$GRML_NAME ] && /bin/rm -f $TARGET/$GRML_DIR/$GRML_NAME
    /usr/bin/rsync -a --progress --include="$GRML_DIR/$GRML_NAME" --include="$GRML_DIR/" --exclude="*" $COPY $TARGET # Copy grml to $TARGET
    #/usr/bin/rsync -avP $COPY $TARGET # Copy grml to $TARGET
  else
    /bin/cp -a -f $COPY $TARGET # Copy grml to $TARGET
  fi
  if [ $? -ne 0 ]
  then
    echo -n "${CRE} ${RED}Copying grml CD-ROM 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_grml
}

mount_grml /cdrom

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
 
# Remount later after copying/isoloading/driverloading?
# pre-test if everything succeeded
if  test -n "$DO_REMOUNT" -a -n "$FOUND_GRML"
then
  # copy library cache 
  cat /GRML/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_GRML"
then
# copy library cache
cat /GRML/etc/ld.so.cache > /etc/ld.so.cache

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

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

# Set paths
log_begin_msg "Setting paths"
PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:."
export PATH

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

# Replace /sbin
/GRML/bin/rm -f /sbin
/GRML/bin/ln -sf /GRML/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 " /GRML | /cdrom " /proc/mounts 2>/dev/null | 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
echo "                       $SUCCESS"

# 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)"
 
# Be verbose
log_begin_msg "Total memory found: $FOUNDMEM kB" ; echo "       $SUCCESS"

# 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 $TOTALMEM / 5)"
RAMSIZE="$(expr $RAMSIZE \* 4)"

# FIXME
RAMSIZE="$(expr $RAMSIZE - 17400)"

# Create additional dynamic ramdisk.
test -z "$RAMSIZE" -o "$RAMSIZE" -lt "$MINSIZE" && RAMSIZE="$MINSIZE"
mkdir -p /ramdisk
# tmpfs/varsize version, can use swap
log_begin_msg "Creating /ramdisk (dynamic size=${RAMSIZE}k) on shared memory"
# We need /bin/mount here for the -o size= option
/bin/mount -t tmpfs -o "size=${RAMSIZE}k" /ramdisk /ramdisk  && echo "$SUCCESS"
mkdir -p /ramdisk/tmp /ramdisk/home/grml && chmod 1777 /ramdisk/tmp && chown grml.grml /ramdisk/home/grml && ln -snf /ramdisk/home /home && mv /tmp /tmp.old && ln -s /ramdisk/tmp /tmp && rm -rf /tmp.old
#/bin/mount -t tmpfs -o "size=${RAMSIZE}k" /ramdisk /ramdisk && mkdir -p /ramdisk/home /ramdisk/var && ln -s /ramdisk/home /ramdisk/var /

stage=3
rundebugshell
# unionfs
log_begin_msg "Creating unionfs and symlinks on ramdisk"
mkdir -p /UNIONFS
if test -n "$UNIONFS" && /bin/mount -t unionfs -o noatime,dirs=/ramdisk=rw:/GRML=ro /UNIONFS /UNIONFS; then
 # We now have unionfs, copy some data from the initial ramdisk first
 cp -a /etc/fstab /etc/auto.mnt /etc/filesystems /etc/mtab /UNIONFS/etc/
 for i in bin boot etc sbin var lib opt root usr; do # Move directories to unionfs
  if test -d /$i; then
   mv /$i /$i.old && \
   /GRML/lib/ld-linux.so.2 --library-path /GRML/lib /GRML/bin/ln -snf /UNIONFS/$i /$i && \
   rm -rf /$i.old
  else
   ln -snf /UNIONFS/$i /$i
  fi
 done
 #echo "${GREEN}done${NORMAL}"
 echo "                 $SUCCESS"
 log_begin_msg "Merging read-only system with read-writeable /ramdisk."
 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 && echo "   $SUCCESS" || echo "   $FAILED"
else
 log_failure_msg "ERROR: CANNOT UNITE READ-ONLY MEDIA AND INITIAL RAMDISK!" ; echo "$FAILED"
 NOUNIONFS="yes"
 /GRML/sbin/halt -f -n
fi

chown grml.grml /home/grml
chmod 1777 /var/tmp
# 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/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 /GRML/etc/ftpusers /GRML/etc/passwd /GRML/etc/shadow /GRML/etc/group \
      /GRML/etc/ppp /GRML/etc/isdn /GRML/etc/ssh \
      /GRML/etc/inittab /GRML/etc/network /GRML/etc/sudoers \
      /GRML/sbin/init /GRML/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
# Diet libc bug workaround
# cp -f /GRML/etc/localtime /etc/localtime
# echo "${BLUE}Done.${NORMAL}"

# 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

# umount /sys (remount in grml-autoconfig)
umount /sys

stage=4
rundebugshell
# Give control to the init process.
log_begin_msg "Starting init process."
rm -f /linuxrc
exit 0

else
echo "${CRE}${RED}Can't find grml filesystem, sorry.${NORMAL}"
echo "${RED}Dropping you to the busybox 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="grml# "
export PS1
echo "6" > /proc/sys/kernel/printk
# Allow signals
trap 1 2 3 15
exec /static/sh
fi