linuxrc

#!/static/sh
# Filename: /linuxrc
# Purpose:  minirt for kernel 2.6 running on grml live-cd
# Authors:  (c) Klaus Knopper <knoppix@knopper.net>, (c) Michael Prokop <mika@grml.org>
# Latest change: Son Dez 03 00:21:25 CET 2006 [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="/static/insmod"
# [ -x /modules/insmod ] && INSMOD="/modules/insmod"

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

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

mountit(){
# Usage: mountit src dst "options"
for fs in $BUILTIN_FS; do
 if test -b $1; then
  options="$3"
  case "$fs" in vfat)
   # We REALLY need this for Knoppix on DOS-filesystems
   shortname="shortname=winnt"
   [ -n "$options" ] && options="$options,$shortname" || options="-o $shortname"
  ;;
  esac
  mount -t $fs $options $1 $2 >/dev/null 2>&1 && return 0
 fi
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

# don't output anything if running with bootsplash feature
if checkbootparam "splash" ; then
  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}"
  exec >/dev/null </dev/null 2>&1
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} $@"
}

log_warn_msg () {
  echo -n " ${YELLOW}*${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 "$CLEAR"
# Just go to the top of the screen
# echo -n ""
echo ""
echo "${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

case "$CMDLINE" in *debuglinuxrc*) set -x; echo "linuxrc debugging activated"; DEBUG="yes"; ;; esac
case "$CMDLINE" in *BOOT_IMAGE=expert\ *) INTERACTIVE="yes"; :>/interactive; ;; esac
case "$CMDLINE" in *BOOT_IMAGE=vmware\ *) VMWARE="yes"; ;; esac
case "$CMDLINE" in *modules-disk*) INTERACTIVE="yes"; ;; esac
case "$CMDLINE" in *BOOT_IMAGE=debug\ *|*\ debug\ *) DEBUG="yes"; ;; esac
case "$CMDLINE" in *secure*) SECURE=",nosuid"; ;; esac
# Does the user want to skip scsi detection?
NOSCSI=""
NOUSB=""
NOFIREWIRE=""
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="" NOUSB2="yes"; ;; esac
case "$CMDLINE" in *\ usb*) USB="yes"; ;; 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

if [ -n "$DEBUG" ]; then
   log_begin_msg "Bootoption debug detected. Printing kernel command line:"
   echo ""
   cat /proc/cmdline
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
  log_begin_msg "Starting intermediate shell stage $stage as requested by \"debug\" option."
  echo ""
  echo "   ${GREEN}-${NORMAL} Just exit the shell to continue boot process...${NORMAL}"
  if [ -x /static/sh ]; then
    /static/sh
  else
    /bin/bash
  fi
 fi
}
rundebugshell

# 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
 echo ""
 for i in "$@"; do
  echo -n "   Probing ${TYPE}... ${WHITE}$i${NORMAL}: "
   if test -f /modules/scsi/$i.ko && $INSMOD -f /modules/scsi/$i.ko >/dev/null 2>&1 && echo "  $SUCCESS" || echo " failed " ; then
     case "$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
if checkbootparam oldscsi ; then
  PROCPCI="`cat /proc/pci 2>/dev/null`"
  case "$PROCPCI" in *[Aa][Ii][Cc]-*|*[Aa][Hh][Aa]-*) SCSI_PROBE="$SCSI_PROBE aic7xxx" ;; esac
  case "$PROCPCI" in *[Bb][Uu][Ss][Ll][Oo][Gg][Ii][Cc]*) SCSI_PROBE="$SCSI_PROBE BusLogic" ;; esac
  case "$PROCPCI" in *[Tt][Rr][Mm]-[Ss]1040*|*[Dd][Cc]395*|*[Dd][Cc]315*) SCSI_PROBE="$SCSI_PROBE dc395x" ;; esac
  case "$PROCPCI" in *53[Cc]8*) SCSI_PROBE="$SCSI_PROBE sym53c8xx" ;; esac
  case "$PROCPCI" in *53[Cc]9*) SCSI_PROBE="$SCSI_PROBE NCR53C9x" ;; esac
  case "$PROCPCI" in *53[Cc]406*) SCSI_PROBE="$SCSI_PROBE NCR53c406a" ;; esac
  case "$PROCPCI" in *[Ii][Nn][Ii][Tt][Ii][Oo]\ *|*[Ii][Nn][Ii]-[Aa]100[Uu]2[Ww]*) SCSI_PROBE="$SCSI_PROBE initio" ;; esac
  case "$PROCPCI" in *[Mm][Pp][Tt]*[Ss][Cc][Ss][Ii]*) SCSI_PROBE="$SCSI_PROBE mptbase mptscsih" ;; esac
  case "$PROCPCI" in *[Aa][Dd][Vv][Aa][Nn][Cc][Ee][Dd]\ [Ss][Yy][Ss]*) SCSI_PROBE="$SCSI_PROBE advansys" ;; esac
  case "$PROCPCI" in *[Aa][Tt][Pp]8*|*[Aa][Ee][Cc]6*) SCSI_PROBE="$SCSI_PROBE atp870u" ;; esac
  case "$PROCPCI" in *[Dd][Tt][Cc]*) SCSI_PROBE="$SCSI_PROBE dtc" ;; esac
  case "$PROCPCI" in *[Ee][Aa][Tt][Aa]*) SCSI_PROBE="$SCSI_PROBE eata" ;; esac
  case "$PROCPCI" in *[Ff]*[Dd][Oo][Mm][Aa][Ii][Nn]*) SCSI_PROBE="$SCSI_PROBE fdomain" ;; esac
  case "$PROCPCI" in *[Gg][Dd][Tt]\ *) SCSI_PROBE="$SCSI_PROBE gdth" ;; esac
  case "$PROCPCI" in *[Mm][Ee][Gg][Aa][Rr][Aa][Ii][Dd]*) SCSI_PROBE="$SCSI_PROBE megaraid_mm megaraid_mbox" ;; esac
  case "$PROCPCI" in *[Qq][Ll][Oo][Gg][Ii][Cc]*) SCSI_PROBE="$SCSI_PROBE qlogicfas408 qlogicfas qlogicfc" ;; esac
  case "$PROCPCI" in *53[Cc]974*) SCSI_PROBE="$SCSI_PROBE tmscsim" ;; esac
  case "$PROCPCI" in *[Uu][Ll][Tt][Rr][Aa][Ss][Tt][Oo][Rr]*) SCSI_PROBE="$SCSI_PROBE ultrastor" ;; esac
  case "$PROCPCI" in *3[Ww][Aa][Rr][Ee]*) SCSI_PROBE="$SCSI_PROBE 3w-xxxx" ;; esac
fi

# New sysfs based SCSI detection (thanks, Jörg Schirottke)
sysfsscsi(){
SYS=$(for x in $(find /sys/devices/ -name modalias); do grep pci: $x; done|cut -f2 -d:)
while read id driver; do
 for sysid in $SYS; do
  case $sysid in $id)
   if [ -z "$SCSI_PROBE" ]; then
    SCSI_PROBE="$driver"
   else
    SCSI_PROBE="$SCSI_PROBE $driver"
   fi
   ;;
  esac
 done
done <<EOF
$(cat /modules/scsi/scsi-modules.txt)
EOF
}

if test -n "$INTERACTIVE"; then
# Let the user select interactively
  askmodules SCSI $(cd /modules/scsi; echo *.ko)
else
# these are the autoprobe-safe modules
  sysfsscsi
  MODULES="$SCSI_PROBE"
fi

if test -z "$NOSCSI" ; then
 log_begin_msg "Scanning for SCSI devices."
 $INSMOD -f /modules/scsi/firmware_class.ko 1>/dev/null
 test -n "$MODULES" && loadmodules SCSI $MODULES &&  echo -n "" || echo "           ${BLUE}[${NORMAL} none found ${BLUE}]${NORMAL} (try bootoption scsi=probe)"
else
  log_warn_msg "Not scanning for SCSI devices as requested on commandline." && echo " $SUCCESS"
fi

if checkbootparam scsi ; then
  MODULE="$(getbootparam 'scsi' 2>/dev/null)"
  if test "$MODULE" = "probe" ; then
    log_begin_msg "Bootoption scsi=probe found. Trying to autoprobe SCSI modules:"
    echo ""
    echo -n "   Trying to load scsi_debug: " ; $INSMOD -f /modules/scsi/scsi_debug.ko 1>/dev/null && echo "           $SUCCESS" || echo " [ failed ]"
    for module in /modules/scsi/*.ko ; do
      echo -n "   Probing ${WHITE}${module}${NORMAL}..."
      $INSMOD -f ${module} >/dev/null 2>&1 && echo " $SUCCESS" || echo " [ failed ]"
    done
  elif test "$MODULE" = "ask" ; then
    askmodules SCSI $(cd /modules/scsi; echo *.ko)
    test -z "$NOSCSI" && test -n "$MODULES" && loadmodules SCSI $MODULES
  else
    [ -n "$MODULE" ] || echo "   ${RED}Neither a specific module nor option probe nor option ask for SCSI module given. Skipping.${NORMAL}"
    [ -n "$MODULE" ] && echo -n "   Trying to load module ${WHITE}${MODULE}${NORMAL}:" ; \
      $INSMOD -f "/modules/scsi/${MODULE}.ko" 1>/dev/null && echo "  $SUCCESS" || echo " [ failed ]"
  fi
fi
# End of SCSI check

if test -n "$VMWARE" ; then
  log_begin_msg "Bootoption VMware detected. Trying to load SCSI modules:"
  echo ""
  for module in mptbase mptscsih mptspi BusLogic ; do
    echo -n "   Trying to load ${WHITE}${module}${NORMAL}: "
    $INSMOD -f /modules/scsi/${module}.ko >/dev/null 2>&1 && echo " $SUCCESS" || echo " [ failed ]"
  done
fi

# Check for USB, use modules on bootfloppy first
if test -z "$NOUSB"; then
  log_begin_msg "Checking for USB."
  if test -f /modules/div/usbcore.ko; then
    $INSMOD /modules/div/usbcore.ko >/dev/null 2>&1
    FOUNDUSB=""
    for i in $USB2 uhci-hcd.ko ohci-hcd.ko usbhid.ko ; do
      test -f /modules/div/$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
      echo "                   $SUCCESS"
    else
      echo "                   ${BLUE}[${NORMAL} not found ${BLUE}]${NORMAL}"
      true
    fi
    if [ -n "$NOUSB2" ] ; then
      echo "   Not loading usb2 module ehci-hcd as requested on commandline."
      echo "   Notice: to skip loading of USB in initrd at all use bootoption nousb"
    fi
  fi
else
  log_warn_msg "Not scanning for USB devices as requested on commandline." && echo " $SUCCESS"
  echo "   Notice that bootoption nousb affects initrd only, it does *not*"
  echo "   avoid loading of usb modules in userspace afterwards"
  echo "   Boot using something like 'nousb blacklist=uhci-hcd' to avoid loading of usb modules at all"
fi
# End of USB check

# Check for Firewire, use modules on bootfloppy first
if test -z "$NOFIREWIRE" ; then
  log_begin_msg "Checking for Firewire."
  if test -f /modules/div/ieee1394.ko ; then
    $INSMOD /modules/div/ieee1394.ko > /dev/null 2>&1
    FOUNDFIREWIRE=""
    test -f /modules/div/ohci1394.ko && $INSMOD /modules/div/ohci1394.ko > /dev/null 2>&1 && FOUNDFIREWIRE="yes"
    if test -n "$FOUNDFIREWIRE" ; then
      test -f /modules/div/sbp2.ko && $INSMOD /modules/div/sbp2.ko > /dev/null 2>&1
      echo "              $SUCCESS"
    else
      echo "               ${BLUE}[${NORMAL} not found ${BLUE}]${NORMAL}"
      true
    fi
  fi
else
  log_warn_msg "Not scanning for firewire devices as requested on commandline." && echo " $SUCCESS"
  echo "   Notice that bootoption nofirewire affects initrd only, it does *not*"
  echo "   avoid loading of firewire modules in userspace afterwards"
  echo "   Boot with something like 'nofirewire blacklist=ohci1394' to avoid loading of firewire modules at all"
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."
  sleep 4
  if test -n "$USB"; then
    sleep 10
  fi
 echo "  $SUCCESS"
fi

if checkbootparam scandelay ; then
  DELAY="$(getbootparam 'scandelay' 2>/dev/null)"
  [ -z $DELAY ] && DELAY='10'
  log_begin_msg "Delaying bootsequence as requested for ${WHITE}${DELAY}${NORMAL} seconds."
  sleep $DELAY && echo "  $SUCCESS"
fi

# boot via pcmcia
if checkbootparam bootpcmcia ; then
  log_begin_msg "Bootoption bootpcmcia found. Trying to load ${WHITE}PCMCIA${NORMAL} modules..."
  if $INSMOD -f /modules/div/pcmcia_core.ko 1>/dev/null ; then
     $INSMOD -f /modules/div/firmware_class.ko 1>/dev/null && \
     $INSMOD -f /modules/div/pcmcia.ko         1>/dev/null && \
     $INSMOD -f /modules/div/rsrc_nonstatic.ko 1>/dev/null && \
     $INSMOD -f /modules/div/yenta_socket.ko   1>/dev/null && echo " $SUCCESS"
  else
    echo " [ failed ]"
  fi
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
# NFS
for i in $cmdline; do case "$i" in nfsdir=*|NFSDIR=*) eval $i;; esac; done
[ -n "$nfsdir" ] && NFS="$nfsdir"
if [ -n "$NFS" ]; then
  tmp_="$(getbootparam nfsdir)"
  log_begin_msg "Bootoption NFS found." ; echo "$SUCCESS"

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

  # starting hw-detection for network card - currently broken, so don't use it
  #  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\""

  KERNELVER=`uname -r`
  for mod in `find /lib/modules/$KERNELVER/kernel/drivers/net/ -name \*.ko` ; do
      echo `basename $mod | sed -e 's/\.ko$//'` >> /modules.load
  done
  modules_to_load=`cat /modules.load | xargs`

  # FIXME modprobe is buggy from busybox
  log_begin_msg "Trying to load network driver(s)." ; echo
  modLoad()
  {
    for mod in $@ ; do
      tmp_="`modprobe -vn $mod 2>/dev/null`"
      if [ $? -ne 0 ]; then
         continue
      fi
      # be quiet by default, be verbose only with bootoption debuglinuxrc
      [ -n "$DEBUG" ] && eval "$tmp_" || eval "$tmp_" 1>/dev/null 2>/dev/null
    done
  }
  modLoad "$modules_to_load"
  rm -f /modules.load

  # loading additional modules
  modLoad sunrpc lockd af_packet nfs

  dhcp_iface_=$(getbootparam dhcp_iface)
  if [ -z "$dhcp_iface_" ]; then
  	dhcp_iface_=`ifconfig -a | grep '^eth' | sed 's/ .*//'`
  fi

  for INTERFACE in $dhcp_iface_ ; do
      log_begin_msg "Requesting network configuration using udhcp for ${INTERFACE}:" ; echo
      /static/timeout 10 /static/udhcpc --interface="${INTERFACE}" --foreground --quit --script=/static/udhcp-config.sh
      # echo "press <enter> to start a system shell and configure your system"
      # sh
  done

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

  log_begin_msg "Looking for GRML in: ${MAGENTA}$NFS${NORMAL}" ; echo "$SUCCESS"
  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 "Accessing grml CDROM at ${MAGENTA}$NFS${NORMAL}" ; echo "$SUCCESS"
      FOUND_GRML="$NFS"
      break
    fi
  fi
fi

# 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
  # notice: use /dev/sd? for usb-sticks without partition(s)
  test -n "$FOUND_SCSI" -a -z "$NOSCSI" && DEVICES="$DEVICES /dev/sd?[1-9] /dev/sd?[1-9][0-9] /dev/sd?"
  DEVICES="$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
    # echo "6" > /proc/sys/kernel/printk
    mount -t squashfs $1/$GRML_DIR/$GRML_NAME /GRML -o loop,ro$SECURE || FOUND_GRML=""
  fi
}

remount_grml()
{
  if test -f $TARGET/$GRML_DIR/$GRML_NAME; then
    umount /GRML # unmount it
    umount $SOURCE  # unmount CD
    [ -n "$SOURCE2" ] && umount $SOURCE2  # umount possible loop-device
    mount_grml $TARGET
  else
    log_failure_msg "Warning: Changing to $TARGET failed."
    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 fuse
  /GRML/sbin/modprobe ntfs
  $INSMOD -f /modules/div/ntfs.ko 1>/dev/null

  if [ -n "$ISO_PATH" ]; then
     LOOP_SOURCE="$TARGET.loop"
     LOOP_SOURCE2="$LOOP_SOURCE"
     TARGET_DEV="$LOOP_SOURCE$ISO_PATH"
     /bin/mkdir $LOOP_SOURCE
     /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
     log_failure_msg "Accessing grml CD-ROM failed. ${MAGENTA}$TARGET_DEV${NORMAL} is not mountable."
     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
    log_failure_msg "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 fuse
      /GRML/sbin/modprobe ntfs
      FS="ext3 ext2 reiserfs reiser4 vfat ntfs"

      MOUNTED=""
      for i in $FS; do
       if /GRML/bin/mount -o rw -t "$i" "$TARGET_DEV" "$TARGET"; then
        MOUNTED="true"
        break
       fi
      done
      if test -z "$MOUNTED"; then
        log_failure_msg "Copying grml CD-ROM failed. ${MAGENTA}$TARGET_DEV_DESC${NORMAL} is not mountable."
        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
    log_failure_msg "Copying grml CD-ROM failed. Not enough free space on ${MAGENTA}${TARGET_DEV_DESC}${NORMAL}. Found: ${MAGENTA}${FOUNDSPACE}k${NORMAL} Need: ${MAGENTA}${SIZE}k${NORMAL}"
    sleep 2
    umount $TARGET
    return 1
  fi

  # do the real copy

  log_begin_msg "Copying grml CD-ROM to ${TARGET_DEV_DESC}... Please be patient."
  echo
  if [ -z "$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 $TARGET
    # make sure to support directories from http://grml.org/config/
    for dir in scripts bootparams config debs ; do
        if [ -d "/cdrom/$dir" ] ; then
           log_begin_msg "Customization directory $dir found, copying to $TARGET"
           cp -a /cdrom/$dir $TARGET/ && echo "$SUCCESS" || echo "$FAILED"
        fi
    done
  else
    /bin/cp -a -f $COPY $TARGET # Copy grml to $TARGET
  fi
  if [ $? -ne 0 ]
  then
    log_failure_msg "Copying grml CD-ROM failed. ${MAGENTA}$TARGET_DEV_DESC${NORMAL} possibly has not enough space left."
    sleep 2
    return 1
  fi
  # remount r/o
  /bin/mount -n -o remount,ro $TARGET 1>/dev/null 2>&1
  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 copy_to, then boot_from
  if [ -n "$COPYTO" ]; then
     copy_to $COPYTO && REAL_TARGET="$TARGET"
  fi
  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
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 1>/dev/null
grep -q unionfs /proc/filesystems && 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

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

# Create additional dynamic ramdisk.
test -z "$RAMSIZE" -o "$RAMSIZE" -lt "$MINSIZE" && RAMSIZE="$MINSIZE"
mkdir -p /ramdisk
# tmpfs/varsize version, can use swap
RAMSIZE=$(expr $RAMSIZE \* 4)
log_begin_msg "Creating /ramdisk (dynamic size=${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

stage=3
rundebugshell
# unionfs
log_begin_msg "Creating unionfs and symlinks on ramdisk"
mkdir -p /UNIONFS
if test -n "$UNIONFS" && /bin/mount -t unionfs -o noatime${SECURE},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/
 # disable resolvconf on the terminalserver client
 rm /UNIONFS/etc/resolv.conf
 cp -a /etc/resolv.conf /UNIONFS/etc
 echo REPORT_ABSENT_SYMLINK=no >> /UNIONFS/etc/default/resolvconf
 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 "                 $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 "   $FAILED"
else
 echo ""
 log_failure_msg "ERROR: CANNOT UNITE READ-ONLY MEDIA AND INITIAL RAMDISK!"
 echo "$FAILED"
 NOUNIONFS="yes"
 /GRML/sbin/halt -f -n
fi

chown grml.grml /home/grml
# old:
# chmod 1777 /var/tmp
# new:
rm -rf /var/tmp/ ; mkdir /var/tmp ; chown root.root /var/tmp ; 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)

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

else
 log_failure_msg "Error: Can't find grml filesystem, sorry."
 echo "
Are you booting via USB or firewire?
====================================
Try to boot with bootparam scandelay which delays the
bootup sequence so modules should have enough time
to initialize devices.

Usage examples on bootprompt of grml-iso:

grml scandelay       -> adds the default delay of 10 seconds
grml scandelay=13    -> adds a delay of 13 seconds

Are you booting via SCSI?
====================================
Use the bootparam scsi.
Usage examples on bootprompt of grml-iso:

grml scsi=probe      -> autoprobing of scsi modules
grml scsi=ask        -> list modules and prompt for module which should be loaded
grml scsi=modulename -> loads specified module (without .ko extension)
expert               -> activate expert mode, similar to scsi=ask

Are you getting SquashFS/zlib errors?
=====================================
Try to boot with \"grml nodma\"

Still problems?
===============
Make sure the ISO itself is ok.
Check the md5sum of downloaded ISO.
Used a CD-RW? Make sure the medium is ok!

Please report any problems you notice to the grml-team!
http://grml.org/contact/
"
 echo "${RED}Now dropping you to the busybox shell.${NORMAL}"
 echo "${RED}Press reset button to quit.${NORMAL}"
 echo ""
 PS1="grml# "
 export PS1
 echo "6" > /proc/sys/kernel/printk
 # Allow signals
 trap 1 2 3 15
 exec /static/sh
fi
# EOF