WebSVN – livecd – Diff – /trunk/linux-live.sl/initrd/liblinuxlive


#!/bin/ash
#
# Functions library :: for Linux Live scripts 5.x.y
# Author: Tomas M. <http://www.linux-live.org>
#
# modified by Urs Beyerle
# - to allow LiveCD mounted over nfs
# - add scsi_mod, sd_mod for usb-storage module
# - only with boot option "automount", all devices in fstab are rw automounted
# - remove detect of CD and Floppy (done by fstab-sync)
# - add sr_mod (USB CDROM support)
# - add SATA to modprobe_usb_modules -> modprobe_usb_sata_modules
# - add fscache (for SL5) 
# - add ide-cd, sr_mod, cdrom (for SL5 cdrom support)
# - add aufs (unionfs replacement)
# - to allow LiveCD mounted over NFS (for diskless client)
# - add functions get_dhcp_lease() and load_network_modules()
# - add ata_piix to modprobe_usb_sata_modules
# - works with unionfs 2.x
# - better detection of network card in case of diskless client
# - add sg, sata_nv module
# - to allow LiveCD mounted over CIFS (for diskless client)
# - add function find_changes
#
 
# ===========================================================
# user interface functions
# ===========================================================
 
# echolog
# $1 = text to show and to write to /var/log/messages
#
echolog()
{
   echo "LIVECD:" "$@" >>/var/log/livedbg
   echo "$@"
}
 
# debug
# commands executed when debug boot parameter is present
#
debug()
{
   echo
   echo "====="
   echo ": Debugging started. Here is the root shell for you."
   echo ": Type your desired command or hit Ctrl+D to continue booting."
   echo
   ash
}
 
# header
# $1 = text to show
#
header()
{
   echolog "[0;1m$1[0;0m"
}
 
fatal()
{
   header "Fatal error occured - $1"
   echolog "Something went wrong and we can't continue booting :("
   echolog "You may explore the system by using simple commands like ls, lsmod, mount, etc."
   echolog "You may also try to hit Ctrl+D. Booting will continue. Use at your own risk."
   echolog "To be safe, hit Ctrl+Alt+Delete to reboot."
   echolog
   ash
}
 
# ===========================================================
# text processing functions
# ===========================================================
 
# egrep_o is a replacement for "egrep -o". It prints only the last
# matching text
# $1 = regular expression
#
egrep_o()
{
   cat | egrep "$1" | sed -r "s/.*($1).*/\\1/"
}
 
# look into cmdline and echo $1 back if $1 is set
# $1 = value name, case sensitive, for example livecd_subdir
# $2 = file to use instead /proc/cmdline, optional
#
cmdline_parameter()
{
   CMDLINE=/proc/cmdline
   if [ "$2" != "" ]; then CMDLINE="$2"; fi
   cat "$CMDLINE" | egrep_o "(^|[[:space:]]+)$1(\$|=|[[:space:]]+)" | egrep_o "$1"
}
 
# look into cmdline and echo value of $1 option
# $1 = value name, case sensitive, for example livecd_subdir
# $2 = file to use instead /proc/cmdline, optional
#
cmdline_value()
{
   CMDLINE=/proc/cmdline
   if [ "$2" != "" ]; then CMDLINE="$2"; fi
   cat "$CMDLINE" | egrep_o "(^|[[:space:]]+)$1=([^[:space:]]+)" | egrep_o "=.*" | cut -b 2- | tail -n 1
}
 
# ===========================================================
# system functions
# ===========================================================
 
# modprobe module $1, including all dependencies, suppress all messages
# (own function because modprobe in busybox doesn't work with gzipped modules)
# $1 = module name, eg. ehci-hcd
# $2 = optional argument
#
modprobe_module()
{
  if [ "$1" = "" ]; then return 1; fi
  PRINTK=`cat /proc/sys/kernel/printk`
  echo "0" >/proc/sys/kernel/printk
 
  KERNEL="`uname -r`"; LSMOD=/tmp/lsmod
  MODULEDEPS="`cat /lib/modules/$KERNEL/modules.dep | egrep \"$1\\.ko(\\.gz)?:\"`"
 
  for MODULE in `echo $MODULEDEPS | cut -d ":" -f 2-` `echo $MODULEDEPS | cut -d ":" -f 1`; do
     MODULE=${MODULE%%:};   # remove : at the end, a bug 
     TMPMOD="/tmp/`basename $MODULE .gz`";
     # if the module is not loaded already
     if [ "`cat $LSMOD 2>/dev/null | egrep \"^$TMPMOD\\\$\"`" = "" ]; then
        gunzip -c $MODULE 2>/dev/null >$TMPMOD
        if [ $? -ne 0 ]; then cp $MODULE $TMPMOD; fi # can't gunzip? copy
        insmod $TMPMOD $2; err=$?
        ### insmod $TMPMOD $2 >/dev/null 2>/dev/null; err=$?
        if [ "$err" -eq 0 ]; then echo $TMPMOD >>$LSMOD; fi # module log
        rm $TMPMOD
     fi
  done
 
  echo "$PRINTK" >/proc/sys/kernel/printk
  if [ "$err" -ne 0 ]; then echolog "error inserting module $1 ($err)"; fi
  return $err
}
 
# Mount device $1 to $2
# $1 = /dev device to mount, eg. /dev/hda1
# $2 = mountpoint, eg. /mnt/hda1
# $3 = mount options, for example "loop", "ro", or "remount,rw"
#
mount_device()
{
  mkdir -p $2
  if [ "$3" != "" ]; then OPTIONS="-o $3"; else OPTIONS=""; fi
 
  PRINTK=`cat /proc/sys/kernel/printk`
  echo "0" >/proc/sys/kernel/printk
 
  mount -t auto $1 $2 $OPTIONS >/dev/null 2>/dev/null
  err=$?
 
  if [ "$err" -ne 0 ]; then rmdir $2 2>/dev/null; fi
  echo "$PRINTK" >/proc/sys/kernel/printk
  return $err
}
 
# ===========================================================
# live module functions
# ===========================================================
 
# Create module
# call mksquashfs with apropriate arguments
# $1 = directory which will be compressed to squashfs module
# $2 = output .mo file
# $3 = optional -keep-as-directory argument
#
create_module()
{
   mksquashfs $1 $2 $3 >/dev/null
   if [ $? -ne 0 ]; then return 1; fi
   chmod oga-x $2 # remove execute attrib
}
 
# Mount .mo module to destination directory
# $1 = path to .mo livecd compressed module
# $2 = destination folder
#
mount_module()
{
   mount -t squashfs -o loop,ro $1 $2
}
 
# Insert a directory tree $2 to an union specified by $1
# Top-level read-write branch is specified by it's index 0
# $1 = union absolute path (starting with /)
# $2 = path to data directory
#
union_insert_dir()
{
   which unionctl >/dev/null 2>&1
   if [ $? -eq 0 ]; then
       # unionfs 1.x or aufs
       unionctl "$1" --add --after 0 --mode ro "$2"
   else
       # unionfs 2.x
       mount -t unionfs -o remount,add=:${2}=ro none "$1"
   fi
}
 
# List all modules in all directories (base, modules, optional)
# and filter out unneeded optional modules (not specified by load= kernel parameter)
# $1 = root directory of mounted DATAdir
#
list_modules()
{
   LOAD="`cmdline_value load`"
   ls -A1d $1/*.mo $1/*/*.mo 2>/dev/null | while read LINE; do
      MODNAME="`basename $LINE .mo`"
      if [ "$LOAD" != "*" -a "`echo $LINE | grep optional`" != "" -a "`echo $LOAD | egrep \"(^|,)$MODNAME(\\\$|,)\"`" = "" ]; then continue
        else echo $LINE; fi
   done
}
 
# Insert one single .mo module to the union
# $1 = union absolute path (starting with /)
# $2 = module.mo full path
# $3 = destination folder, where images will be mounted to
#
union_insert_module()
{
   TARGET="$3/`basename $2`"
   while [ -e $TARGET ]; do TARGET=$TARGET.X; done
   mkdir -p $TARGET
   mount_module $2 $TARGET
   if [ $? -ne 0 ]; then echo "can't read module data"; return 1; fi
   union_insert_dir $1 $TARGET; 
}
 
# Insert all .mo modules, in $2 directory and subdirectories, to the union
# $1 = union absolute path (starting with /)
# $2 = LiveCD data dir (with directories /base, /modules, etc.)
# $3 = destination folder, where images will be mounted to
#
union_insert_modules()
{
   PRINTK=`cat /proc/sys/kernel/printk`
   echo "0" >/proc/sys/kernel/printk
 
   list_modules $2 | while read MODULE; do
      echo " -> `basename $MODULE`"
      union_insert_module $1 $MODULE $3
   done
 
   echo "$PRINTK" >/proc/sys/kernel/printk
}
 
# Copy modules to RAM directory
# $1 = data directory
# $2 = target directory in RAM
#
copy_to_ram()
{
   cp -R $1/* $2
   if [ $? -ne 0 ]; then fatal "can't copy to RAM, not enough memory?"; fi
}
 
# Copy content of "rootcopy" directory on the CD to $2 (union, usually)
# $1 = source
# $2 = destination
#
copy_rootchanges()
{
   cp -a $1/rootcopy/* $2 2>/dev/null # could be empty
}
 
# ===========================================================
# discovery functions
# ===========================================================
 
# List all CD-ROMs
# by using /proc entries
#
list_cdrom_devices()
{
   if [ "`cmdline_parameter nocd`" != "" ]; then return 1; fi
   for CDDEVICE in `cat /proc/sys/dev/cdrom/info | head -n 3 | tail -n 1 | cut -d ":" -f 2`; do
      echo "/dev/$CDDEVICE"
   done
}
 
# List all partition devices
# take list of all partitions and output unique disks.
# Return empty result when nohd parameter was given.
#
list_partition_devices()
{
   if [ "`cmdline_parameter nohd`" != "" ]; then return 1; fi
   cat /proc/partitions | grep -v loop | sed -r "s/^[0-9[:space:]]+/\/dev\//" | grep /dev/
}
 
# List all disk devices
#
list_disk_devices()
{
   list_partition_devices | egrep -v "[0-9]"
}
 
# List all block devices
#
list_block_devices()
{
   list_cdrom_devices
   list_partition_devices
}
 
# Try to mount all disks, partitions and cdroms and Find where the LiveCD is.
# If LiveCD found in the device, echo dirname of it's directory,
# and leave the device mounted. Mounting is not ro, but without any argument.
# $1 = directory where devices will be mounted
# added: mount $NFSROOT to /$1/nfs if NFSROOT is set. and search there for LiveCD
#
find_live_data_dir()
{
   if [ "$NFSROOT" != "" ]; then 
      DIR="/$1/nfs"
      mkdir -p $DIR
      # try to mount nfs dir
      mount -t nfs -o $NFSOPT $NFSROOT $DIR
   fi
 
   if [ "$CIFSROOT" != "" ]; then
      DIR="/$1/cifs"
      mkdir -p $DIR
      # try to mount cifs dir
      mount -t cifs $CIFSROOT $DIR -o ro,$CIFSOPTS
   fi
 
   if [ "$DIR" = "" ]; then
       list_block_devices | while read DEVICE; do
	   DIR="/$1/`basename $DEVICE`"
	   mount_device $DEVICE $DIR
	   if [ $? -ne 0 ]; then continue; fi
	   # FOUND=`find $DIR -name livecd.sgn -type f | head -n 1`
	   FOUND=`ls -A1d $DIR/livecd.sgn $DIR/*/livecd.sgn 2>/dev/null | head -n 1`
	   if [ "$FOUND" = "" ]; then umount $DIR 2>/dev/null; rmdir $DIR 2>/dev/null
	   else dirname "$FOUND"; return 1; fi
       done
   else
       # FOUND=`find $DIR -name livecd.sgn -type f | head -n 1`
       FOUND=`ls -A1d $DIR/livecd.sgn $DIR/*/livecd.sgn 2>/dev/null | head -n 1`
       if [ "$FOUND" != "" ]; then 
	   dirname "$FOUND"
       fi
   fi
}
 
# ===========================================================
# hardware preparation functions
# ===========================================================
 
# Create block devices to /dev described by /sys entries
#
create_block_devices()
{
   echolog "creating /dev entries for block devices"
   ls -A1d /sys/block/*/dev /sys/block/*/*/dev 2>/dev/null | grep -v loop | while read BLOCK; do
      DEVICE="/dev/`basename \`dirname $BLOCK\``"
      if [ ! -b $DEVICE ]; then
         MINORMAJOR="`head -n 1 $BLOCK | tr ':' ' '`"
         mknod $DEVICE b $MINORMAJOR
      fi
   done
}
 
# modprobe kernel modules needed for the LiveCD
#
modprobe_essential_modules()
{
   echolog "starting loop device support"
   modprobe_module loop max_loop=32
   echolog "starting cdrom support"
   modprobe_module ide_cd
   modprobe_module ide-cd
   modprobe_module sr_mod
   modprobe_module cdrom
   echolog "starting cdrom filesystem support"
   modprobe_module isofs
   echolog "starting squashfs support"
   modprobe_module squashfs
   echolog "starting unionfs/aufs support"
   modprobe_module unionfs
   modprobe_module aufs
   echolog "starting vfat support"
   # modprobe_module nls_cp437
   # modprobe_module nls_iso8859-1
   # modprobe_module nls_iso8859-2
   modprobe_module vfat
   echolog "starting ntfs support"
   modprobe_module ntfs
   modprobe_module nls_utf8
   create_block_devices
}
 
 
# modprobe kernel modules needed for USB masstorage devices
#
modprobe_usb_sata_modules()
{
   echolog "starting USB and SATA support"
   modprobe_module ehci-hcd
   modprobe_module ohci-hcd
   modprobe_module uhci-hcd
   modprobe_module scsi_mod
 
   modprobe_module libata
   modprobe_module ata_piix
   modprobe_module ahci
   modprobe_module sata_nv
   modprobe_module sg
 
   modprobe_module sd_mod
   modprobe_module sr_mod
   modprobe_module usb-storage
   echolog "waiting for USB devices, max 8 seconds"
   sleep 8
   create_block_devices
}
 
# modprobe nfs kernel modules
#
modprobe_nfs_modules()
{
   echolog "starting nfs support"
   modprobe_module lockd
   modprobe_module fscache
   modprobe_module nfs_acl
   modprobe_module nfs
}
 
# modprobe cifs kernel module
#
modprobe_cifs_modules()
{
  echolog "starting cifs support"
  modprobe_module cifs
}
 
# enable/disable CD autoejecting when unmounted
# $1 = 1|0 ... enable|disable
#
cd_autoeject()
{
   echo $1 >/proc/sys/dev/cdrom/autoeject
}
 
# Disable DMA if nodma boot parameter is present
#
setup_dma()
{
   if [ ! "`cmdline_parameter nodma`" = "" ]; then
      for DEVICE in `list_cdrom_devices` `list_disk_devices`; do
         echolog "setting DMA support off for $DEVICE"
         hdparm -d 0 $DEVICE
      done
   fi
}
 
# create correct fstab file in $1/etc/fstab and create apropriate
# mount directories in $1
# $1 = root directory (union)
#
activate_fstab()
{
   mkdir -p $1/etc
   FSTAB="$1/etc/fstab"
   echo "tmpfs            /                tmpfs       defaults         0   0" >$FSTAB
   echo "devpts           /dev/pts         devpts      gid=5,mode=620   0   0" >>$FSTAB
   echo "proc             /proc            proc        defaults         0   0" >>$FSTAB
 
   # all the rest will be done by runlast or by fstab-sync
   # search for SWAP done later in /etc/rc.sysinit
}
 
 
# find partition and/or folder that stores the changes
# return false, if changes not set or changes folder/partition not found
# Urs Beyerle
#
find_changes()
{
    echolog "looking for changes in $CHANGESVAL"
 
    CHANGESDEV="`echo "$CHANGESVAL" | egrep -o "^/dev/[^/]+"`"
    CHANGESFOLDER="`echo "$CHANGESVAL" | sed -r 's:^/dev/[^/]+(.*):\1:'`"
    # (re-)define CHANGES if CHANGESFOLDER is set
    if [ "$CHANGESFOLDER" != "" ]; then CHANGES=$MEMORY/$CHANGESFOLDER; fi
 
    # we may need usb and sata support
    modprobe_usb_sata_modules
 
    # device defined?
    if [ "$CHANGESDEV" != "" ]; then
	mount_device $CHANGESDEV $MEMORY
	if [ $? -eq 0 ]; then 
	    echolog "mounted $CHANGESDEV to $MEMORY"
	else
	    echolog "WARNING: device $CHANGESDEV could not be mounted! Continue booting in 10 sec. ..."
	    CHANGESVAL=""
	    sleep 10
	fi
	return
    fi
    
    # if no device is specified, search all devices for folder CHANGESFOLDER
    list_block_devices | while read DEVICE; do
	mount_device $DEVICE $MEMORY
	if [ $? -ne 0 ]; then continue; fi
	FOUND_FOLDER=`ls -1d $MEMORY/$CHANGESFOLDER 2>/dev/null`
	if [ "$FOUND_FOLDER" = "" ]; then 
	    umount $MEMORY 2>/dev/null
	else
	    echolog "found folder $CHANGESFOLDER on $DEVICE"
	    break
	fi
    done
 
    FOUND_FOLDER=`ls -1d $MEMORY/$CHANGESFOLDER 2>/dev/null`
 
    if [ "$FOUND_FOLDER" = "" ]; then 
	echolog "WARNING: changes=$CHANGESVAL not found! Continue booting in 10 sec. ..."
 
	CHANGESVAL=""
	sleep 10
    fi
 
}
 
 
# ===========================================================
# functions used for LiveCD on NFS 
# ===========================================================
 
# load network modules, if NFSROOT is set
# Urs Beyerle
#
 
# network devices found ?
#
found_nic()
{
    found="1"
    for iface in eth0 eth1 eth2 eth3 eth4 eth5; do
	# nic already found ?
	echo $FOUND_IFACE | grep -q $iface 
	if [ $? -ne 0 ]; then
	    ifconfig $iface > /dev/null 2>&1
	    if [ $? -eq 0 ]; then 
		FOUND_IFACE="$FOUND_IFACE $iface"
		found="0"
	    fi
	fi
    done
    return $found
}
 
# 1. load network driver defined by kernel parameter nic
#
load_network_module_nic()
{
    NIC="`cmdline_value nic`"
    if [ -n "$NIC" ]; then
	echolog "load module $NIC"
	modprobe_module $NIC
    fi
}
 
 
# 2. auto probe for network card drivers
#
load_network_module_auto()
{
    echolog "auto-detection of network driver ..."
    FOUND_NICS=""
    KERNEL="`uname -r`"
    NETDRIVERS="`find /lib/modules/$KERNEL/kernel/drivers/net | grep -v mii | grep .ko | cut -d"/" -f8 | cut -d"." -f1 | uniq`"
    for driver in $NETDRIVERS; do
       	modprobe_module $driver > /dev/null 2>&1
	found_nic
	if [ $? -eq 0 ]; then
	    echolog "found network card $driver"
	    echolog "load module $driver"
	    FOUND_NICS="$FOUND_NICS $driver"
	else
	    rmmod $driver > /dev/null 2>&1
	fi
    done
 
    # clean up: remove unused modules until driver "mii"
    LOADED_DRIVERS="`lsmod | grep -v Module | cut -d" " -f1`"
    for driver in $LOADED_DRIVERS; do
	[ "$driver" = "mii" ]  && break
	[ "$driver" = "ntfs" ] && break
	[ "$driver" = "vfat" ] && break
	do_not_remove=""
	for nic in $FOUND_NICS; do
	    echo $driver | grep -q $nic 
	    [ $? -eq 0 ] && do_not_remove="$driver"
	done
	[ ! $do_not_remove ] && rmmod $driver > /dev/null 2>&1
    done
}
 
# 3. detecting network card from pcitable list
#
load_network_module_pcitable()
{
    PCITABLE=/bin/pcitable
    NICS=`lspci -n | awk '/Class 0200/ {print $4}' | tr ':' ' ' \
	| while read x y ; do grep "0x$x.*0x$y" $PCITABLE \
	| awk '$3 !~ /"unknown"/ {print $3}' | tr -d '"' ; done`
    
    if [ -n "$NICS" ]; then
	echolog "found network card(s): $NICS"
	for driver in $NICS; do
	    echolog "load module $driver"
	    modprobe_module $driver
	done
    fi
}
 
# 4. ask the user for a network driver
#
load_network_module_ask()
{
    echo "ERROR: No network card detected!"
    echo "Type in your network card driver (e.g. tg3, e1000). "
    echo "Or ask your system administrator for help."
    echo -n "Network card driver: "
    read driver
    echo "load module $driver"
    modprobe_module $driver
}
 
# Try to find a network driver
#
load_network_modules()
{
    echolog "load network modules"
 
    # mii maybe need by NIC driver
    modprobe_module mii
 
    FOUND_IFACE=""
    load_network_module_nic
    found_nic          || load_network_module_auto
    [ "$FOUND_IFACE" ] || load_network_module_pcitable
    [ "$FOUND_IFACE" ] || load_network_module_ask
 
    # remove mii, if not needed
    rmmod mii > /dev/null 2>&1
}
 
 
# get DHCP lease
# Urs Beyerle
#
get_dhcp_lease()
{
    # create /dev/urandom (needed by udhcpc)
    mknod /dev/urandom c 1 9
 
    for iface in eth0 eth1 eth2 eth3 eth4 eth5; do
	# interface up ?
	ifconfig $iface > /dev/null 2>&1
	if [ $? -eq 0 ]; then
	    # get dhcp lease
	    echolog "try to get DHCP lease on $iface"
	    udhcpc --now --quit --interface=$iface --script=/bin/udhcpc.script
	    [ $? -eq 0 ] && return
	    echo "ERROR: couldn't get DHCP lease on $iface."
	fi
    done
}

Rev 176	Rev 177
1	`#!/bin/ash`	1	`#!/bin/ash`
2	`#`	2	`#`
3	`# Functions library :: for Linux Live scripts 5.x.y`	3	`# Functions library :: for Linux Live scripts 5.x.y`
4	`# Author: Tomas M. <http://www.linux-live.org>`	4	`# Author: Tomas M. <http://www.linux-live.org>`
5	`#`	5	`#`
6	`# modified by Urs Beyerle`	6	`# modified by Urs Beyerle`
7	`# - to allow LiveCD mounted over nfs`	7	`# - to allow LiveCD mounted over nfs`
8	`# - add scsi_mod, sd_mod for usb-storage module`	8	`# - add scsi_mod, sd_mod for usb-storage module`
9	`# - only with boot option "automount", all devices in fstab are rw automounted`	9	`# - only with boot option "automount", all devices in fstab are rw automounted`
10	`# - remove detect of CD and Floppy (done by fstab-sync)`	10	`# - remove detect of CD and Floppy (done by fstab-sync)`
11	`# - add sr_mod (USB CDROM support)`	11	`# - add sr_mod (USB CDROM support)`
12	`# - add SATA to modprobe_usb_modules -> modprobe_usb_sata_modules`	12	`# - add SATA to modprobe_usb_modules -> modprobe_usb_sata_modules`
13	`# - add fscache (for SL5)`	13	`# - add fscache (for SL5)`
14	`# - add ide-cd, sr_mod, cdrom (for SL5 cdrom support)`	14	`# - add ide-cd, sr_mod, cdrom (for SL5 cdrom support)`
15	`# - add aufs (unionfs replacement)`	15	`# - add aufs (unionfs replacement)`
16	`# - to allow LiveCD mounted over NFS (for diskless client)`	16	`# - to allow LiveCD mounted over NFS (for diskless client)`
17	`# - add functions get_dhcp_lease() and load_network_modules()`	17	`# - add functions get_dhcp_lease() and load_network_modules()`
18	`# - add ata_piix to modprobe_usb_sata_modules`	18	`# - add ata_piix to modprobe_usb_sata_modules`
19	`# - works with unionfs 2.x`	19	`# - works with unionfs 2.x`
20	`# - better detection of network card in case of diskless client`	20	`# - better detection of network card in case of diskless client`
21	`# - add sg, sata_nv module`	21	`# - add sg, sata_nv module`
22	`# - to allow LiveCD mounted over CIFS (for diskless client)`	22	`# - to allow LiveCD mounted over CIFS (for diskless client)`
23	`# - add function find_changes`	23	`# - add function find_changes`
24	`#`	24	`#`
25		25
26	`# ===========================================================`	26	`# ===========================================================`
27	`# user interface functions`	27	`# user interface functions`
28	`# ===========================================================`	28	`# ===========================================================`
29		29
30	`# echolog`	30	`# echolog`
31	`# $1 = text to show and to write to /var/log/messages`	31	`# $1 = text to show and to write to /var/log/messages`
32	`#`	32	`#`
33	`echolog()`	33	`echolog()`
34	`{`	34	`{`
35	`echo "LIVECD:" "$@" >>/var/log/livedbg`	35	`echo "LIVECD:" "$@" >>/var/log/livedbg`
36	`echo "$@"`	36	`echo "$@"`
37	`}`	37	`}`
38		38
39	`# debug`	39	`# debug`
40	`# commands executed when debug boot parameter is present`	40	`# commands executed when debug boot parameter is present`
41	`#`	41	`#`
42	`debug()`	42	`debug()`
43	`{`	43	`{`
44	`echo`	44	`echo`
45	`echo "====="`	45	`echo "====="`
46	`echo ": Debugging started. Here is the root shell for you."`	46	`echo ": Debugging started. Here is the root shell for you."`
47	`echo ": Type your desired command or hit Ctrl+D to continue booting."`	47	`echo ": Type your desired command or hit Ctrl+D to continue booting."`
48	`echo`	48	`echo`
49	`ash`	49	`ash`
50	`}`	50	`}`
51		51
52	`# header`	52	`# header`
53	`# $1 = text to show`	53	`# $1 = text to show`
54	`#`	54	`#`
55	`header()`	55	`header()`
56	`{`	56	`{`
57	`echolog "[0;1m$1[0;0m"`	57	`echolog "[0;1m$1[0;0m"`
58	`}`	58	`}`
59		59
60	`fatal()`	60	`fatal()`
61	`{`	61	`{`
62	`header "Fatal error occured - $1"`	62	`header "Fatal error occured - $1"`
63	`echolog "Something went wrong and we can't continue booting :("`	63	`echolog "Something went wrong and we can't continue booting :("`
64	`echolog "You may explore the system by using simple commands like ls, lsmod, mount, etc."`	64	`echolog "You may explore the system by using simple commands like ls, lsmod, mount, etc."`
65	`echolog "You may also try to hit Ctrl+D. Booting will continue. Use at your own risk."`	65	`echolog "You may also try to hit Ctrl+D. Booting will continue. Use at your own risk."`
66	`echolog "To be safe, hit Ctrl+Alt+Delete to reboot."`	66	`echolog "To be safe, hit Ctrl+Alt+Delete to reboot."`
67	`echolog`	67	`echolog`
68	`ash`	68	`ash`
69	`}`	69	`}`
70		70
71	`# ===========================================================`	71	`# ===========================================================`
72	`# text processing functions`	72	`# text processing functions`
73	`# ===========================================================`	73	`# ===========================================================`
74		74
75	`# egrep_o is a replacement for "egrep -o". It prints only the last`	75	`# egrep_o is a replacement for "egrep -o". It prints only the last`
76	`# matching text`	76	`# matching text`
77	`# $1 = regular expression`	77	`# $1 = regular expression`
78	`#`	78	`#`
79	`egrep_o()`	79	`egrep_o()`
80	`{`	80	`{`
81	`cat \| egrep "$1" \| sed -r "s/.($1)./\\1/"`	81	`cat \| egrep "$1" \| sed -r "s/.($1)./\\1/"`
82	`}`	82	`}`
83		83
84	`# look into cmdline and echo $1 back if $1 is set`	84	`# look into cmdline and echo $1 back if $1 is set`
85	`# $1 = value name, case sensitive, for example livecd_subdir`	85	`# $1 = value name, case sensitive, for example livecd_subdir`
86	`# $2 = file to use instead /proc/cmdline, optional`	86	`# $2 = file to use instead /proc/cmdline, optional`
87	`#`	87	`#`
88	`cmdline_parameter()`	88	`cmdline_parameter()`
89	`{`	89	`{`
90	`CMDLINE=/proc/cmdline`	90	`CMDLINE=/proc/cmdline`
91	`if [ "$2" != "" ]; then CMDLINE="$2"; fi`	91	`if [ "$2" != "" ]; then CMDLINE="$2"; fi`
92	`cat "$CMDLINE" \| egrep_o "(^\|[[:space:]]+)$1(\$\|=\|[[:space:]]+)" \| egrep_o "$1"`	92	`cat "$CMDLINE" \| egrep_o "(^\|[[:space:]]+)$1(\$\|=\|[[:space:]]+)" \| egrep_o "$1"`
93	`}`	93	`}`
94		94
95	`# look into cmdline and echo value of $1 option`	95	`# look into cmdline and echo value of $1 option`
96	`# $1 = value name, case sensitive, for example livecd_subdir`	96	`# $1 = value name, case sensitive, for example livecd_subdir`
97	`# $2 = file to use instead /proc/cmdline, optional`	97	`# $2 = file to use instead /proc/cmdline, optional`
98	`#`	98	`#`
99	`cmdline_value()`	99	`cmdline_value()`
100	`{`	100	`{`
101	`CMDLINE=/proc/cmdline`	101	`CMDLINE=/proc/cmdline`
102	`if [ "$2" != "" ]; then CMDLINE="$2"; fi`	102	`if [ "$2" != "" ]; then CMDLINE="$2"; fi`
103	`cat "$CMDLINE" \| egrep_o "(^\|[[:space:]]+)$1=([^[:space:]]+)" \| egrep_o "=.*" \| cut -b 2- \| tail -n 1`	103	`cat "$CMDLINE" \| egrep_o "(^\|[[:space:]]+)$1=([^[:space:]]+)" \| egrep_o "=.*" \| cut -b 2- \| tail -n 1`
104	`}`	104	`}`
105		105
106	`# ===========================================================`	106	`# ===========================================================`
107	`# system functions`	107	`# system functions`
108	`# ===========================================================`	108	`# ===========================================================`
109		109
110	`# modprobe module $1, including all dependencies, suppress all messages`	110	`# modprobe module $1, including all dependencies, suppress all messages`
111	`# (own function because modprobe in busybox doesn't work with gzipped modules)`	111	`# (own function because modprobe in busybox doesn't work with gzipped modules)`
112	`# $1 = module name, eg. ehci-hcd`	112	`# $1 = module name, eg. ehci-hcd`
113	`# $2 = optional argument`	113	`# $2 = optional argument`
114	`#`	114	`#`
115	`modprobe_module()`	115	`modprobe_module()`
116	`{`	116	`{`
117	`if [ "$1" = "" ]; then return 1; fi`	117	`if [ "$1" = "" ]; then return 1; fi`
118	PRINTK=`cat /proc/sys/kernel/printk`	118	PRINTK=`cat /proc/sys/kernel/printk`
119	`echo "0" >/proc/sys/kernel/printk`	119	`echo "0" >/proc/sys/kernel/printk`
120		120
121	KERNEL="`uname -r`"; LSMOD=/tmp/lsmod	121	KERNEL="`uname -r`"; LSMOD=/tmp/lsmod
122	MODULEDEPS="`cat /lib/modules/$KERNEL/modules.dep \| egrep \"$1\\.ko(\\.gz)?:\"`"	122	MODULEDEPS="`cat /lib/modules/$KERNEL/modules.dep \| egrep \"$1\\.ko(\\.gz)?:\"`"
123		123
124	for MODULE in `echo $MODULEDEPS \| cut -d ":" -f 2-` `echo $MODULEDEPS \| cut -d ":" -f 1`; do	124	for MODULE in `echo $MODULEDEPS \| cut -d ":" -f 2-` `echo $MODULEDEPS \| cut -d ":" -f 1`; do
125	`MODULE=${MODULE%%:}; # remove : at the end, a bug`	125	`MODULE=${MODULE%%:}; # remove : at the end, a bug`
126	TMPMOD="/tmp/`basename $MODULE .gz`";	126	TMPMOD="/tmp/`basename $MODULE .gz`";
127	`# if the module is not loaded already`	127	`# if the module is not loaded already`
128	if [ "`cat $LSMOD 2>/dev/null \| egrep \"^$TMPMOD\\\$\"`" = "" ]; then	128	if [ "`cat $LSMOD 2>/dev/null \| egrep \"^$TMPMOD\\\$\"`" = "" ]; then
129	`gunzip -c $MODULE 2>/dev/null >$TMPMOD`	129	`gunzip -c $MODULE 2>/dev/null >$TMPMOD`
130	`if [ $? -ne 0 ]; then cp $MODULE $TMPMOD; fi # can't gunzip? copy`	130	`if [ $? -ne 0 ]; then cp $MODULE $TMPMOD; fi # can't gunzip? copy`
131	`insmod $TMPMOD $2; err=$?`	131	`insmod $TMPMOD $2; err=$?`
132	`### insmod $TMPMOD $2 >/dev/null 2>/dev/null; err=$?`	132	`### insmod $TMPMOD $2 >/dev/null 2>/dev/null; err=$?`
133	`if [ "$err" -eq 0 ]; then echo $TMPMOD >>$LSMOD; fi # module log`	133	`if [ "$err" -eq 0 ]; then echo $TMPMOD >>$LSMOD; fi # module log`
134	`rm $TMPMOD`	134	`rm $TMPMOD`
135	`fi`	135	`fi`
136	`done`	136	`done`
137		137
138	`echo "$PRINTK" >/proc/sys/kernel/printk`	138	`echo "$PRINTK" >/proc/sys/kernel/printk`
139	`if [ "$err" -ne 0 ]; then echolog "error inserting module $1 ($err)"; fi`	139	`if [ "$err" -ne 0 ]; then echolog "error inserting module $1 ($err)"; fi`
140	`return $err`	140	`return $err`
141	`}`	141	`}`
142		142
143	`# Mount device $1 to $2`	143	`# Mount device $1 to $2`
144	`# $1 = /dev device to mount, eg. /dev/hda1`	144	`# $1 = /dev device to mount, eg. /dev/hda1`
145	`# $2 = mountpoint, eg. /mnt/hda1`	145	`# $2 = mountpoint, eg. /mnt/hda1`
146	`# $3 = mount options, for example "loop", "ro", or "remount,rw"`	146	`# $3 = mount options, for example "loop", "ro", or "remount,rw"`
147	`#`	147	`#`
148	`mount_device()`	148	`mount_device()`
149	`{`	149	`{`
150	`mkdir -p $2`	150	`mkdir -p $2`
151	`if [ "$3" != "" ]; then OPTIONS="-o $3"; else OPTIONS=""; fi`	151	`if [ "$3" != "" ]; then OPTIONS="-o $3"; else OPTIONS=""; fi`
152		152
153	PRINTK=`cat /proc/sys/kernel/printk`	153	PRINTK=`cat /proc/sys/kernel/printk`
154	`echo "0" >/proc/sys/kernel/printk`	154	`echo "0" >/proc/sys/kernel/printk`
155		155
156	`mount -t auto $1 $2 $OPTIONS >/dev/null 2>/dev/null`	156	`mount -t auto $1 $2 $OPTIONS >/dev/null 2>/dev/null`
157	`err=$?`	157	`err=$?`
158		158
159	`if [ "$err" -ne 0 ]; then rmdir $2 2>/dev/null; fi`	159	`if [ "$err" -ne 0 ]; then rmdir $2 2>/dev/null; fi`
160	`echo "$PRINTK" >/proc/sys/kernel/printk`	160	`echo "$PRINTK" >/proc/sys/kernel/printk`
161	`return $err`	161	`return $err`
162	`}`	162	`}`
163		163
164	`# ===========================================================`	164	`# ===========================================================`
165	`# live module functions`	165	`# live module functions`
166	`# ===========================================================`	166	`# ===========================================================`
167		167
168	`# Create module`	168	`# Create module`
169	`# call mksquashfs with apropriate arguments`	169	`# call mksquashfs with apropriate arguments`
170	`# $1 = directory which will be compressed to squashfs module`	170	`# $1 = directory which will be compressed to squashfs module`
171	`# $2 = output .mo file`	171	`# $2 = output .mo file`
172	`# $3 = optional -keep-as-directory argument`	172	`# $3 = optional -keep-as-directory argument`
173	`#`	173	`#`
174	`create_module()`	174	`create_module()`
175	`{`	175	`{`
176	`mksquashfs $1 $2 $3 >/dev/null`	176	`mksquashfs $1 $2 $3 >/dev/null`
177	`if [ $? -ne 0 ]; then return 1; fi`	177	`if [ $? -ne 0 ]; then return 1; fi`
178	`chmod oga-x $2 # remove execute attrib`	178	`chmod oga-x $2 # remove execute attrib`
179	`}`	179	`}`
180		180
181	`# Mount .mo module to destination directory`	181	`# Mount .mo module to destination directory`
182	`# $1 = path to .mo livecd compressed module`	182	`# $1 = path to .mo livecd compressed module`
183	`# $2 = destination folder`	183	`# $2 = destination folder`
184	`#`	184	`#`
185	`mount_module()`	185	`mount_module()`
186	`{`	186	`{`
187	`mount -t squashfs -o loop,ro $1 $2`	187	`mount -t squashfs -o loop,ro $1 $2`
188	`}`	188	`}`
189		189
190	`# Insert a directory tree $2 to an union specified by $1`	190	`# Insert a directory tree $2 to an union specified by $1`
191	`# Top-level read-write branch is specified by it's index 0`	191	`# Top-level read-write branch is specified by it's index 0`
192	`# $1 = union absolute path (starting with /)`	192	`# $1 = union absolute path (starting with /)`
193	`# $2 = path to data directory`	193	`# $2 = path to data directory`
194	`#`	194	`#`
195	`union_insert_dir()`	195	`union_insert_dir()`
196	`{`	196	`{`
197	`which unionctl >/dev/null 2>&1`	197	`which unionctl >/dev/null 2>&1`
198	`if [ $? -eq 0 ]; then`	198	`if [ $? -eq 0 ]; then`
199	`# unionfs 1.x or aufs`	199	`# unionfs 1.x or aufs`
200	`unionctl "$1" --add --after 0 --mode ro "$2"`	200	`unionctl "$1" --add --after 0 --mode ro "$2"`
201	`else`	201	`else`
202	`# unionfs 2.x`	202	`# unionfs 2.x`
203	`mount -t unionfs -o remount,add=:${2}=ro none "$1"`	203	`mount -t unionfs -o remount,add=:${2}=ro none "$1"`
204	`fi`	204	`fi`
205	`}`	205	`}`
206		206
207	`# List all modules in all directories (base, modules, optional)`	207	`# List all modules in all directories (base, modules, optional)`
208	`# and filter out unneeded optional modules (not specified by load= kernel parameter)`	208	`# and filter out unneeded optional modules (not specified by load= kernel parameter)`
209	`# $1 = root directory of mounted DATAdir`	209	`# $1 = root directory of mounted DATAdir`
210	`#`	210	`#`
211	`list_modules()`	211	`list_modules()`
212	`{`	212	`{`
213	LOAD="`cmdline_value load`"	213	LOAD="`cmdline_value load`"
214	`ls -A1d $1/.mo $1//*.mo 2>/dev/null \| while read LINE; do`	214	`ls -A1d $1/.mo $1//*.mo 2>/dev/null \| while read LINE; do`
215	MODNAME="`basename $LINE .mo`"	215	MODNAME="`basename $LINE .mo`"
216	if [ "$LOAD" != "*" -a "`echo $LINE \| grep optional`" != "" -a "`echo $LOAD \| egrep \"(^\|,)$MODNAME(\\\$\|,)\"`" = "" ]; then continue	216	if [ "$LOAD" != "*" -a "`echo $LINE \| grep optional`" != "" -a "`echo $LOAD \| egrep \"(^\|,)$MODNAME(\\\$\|,)\"`" = "" ]; then continue
217	`else echo $LINE; fi`	217	`else echo $LINE; fi`
218	`done`	218	`done`
219	`}`	219	`}`
220		220
221	`# Insert one single .mo module to the union`	221	`# Insert one single .mo module to the union`
222	`# $1 = union absolute path (starting with /)`	222	`# $1 = union absolute path (starting with /)`
223	`# $2 = module.mo full path`	223	`# $2 = module.mo full path`
224	`# $3 = destination folder, where images will be mounted to`	224	`# $3 = destination folder, where images will be mounted to`
225	`#`	225	`#`
226	`union_insert_module()`	226	`union_insert_module()`
227	`{`	227	`{`
228	TARGET="$3/`basename $2`"	228	TARGET="$3/`basename $2`"
229	`while [ -e $TARGET ]; do TARGET=$TARGET.X; done`	229	`while [ -e $TARGET ]; do TARGET=$TARGET.X; done`
230	`mkdir -p $TARGET`	230	`mkdir -p $TARGET`
231	`mount_module $2 $TARGET`	231	`mount_module $2 $TARGET`
232	`if [ $? -ne 0 ]; then echo "can't read module data"; return 1; fi`	232	`if [ $? -ne 0 ]; then echo "can't read module data"; return 1; fi`
233	`union_insert_dir $1 $TARGET;`	233	`union_insert_dir $1 $TARGET;`
234	`}`	234	`}`
235		235
236	`# Insert all .mo modules, in $2 directory and subdirectories, to the union`	236	`# Insert all .mo modules, in $2 directory and subdirectories, to the union`
237	`# $1 = union absolute path (starting with /)`	237	`# $1 = union absolute path (starting with /)`
238	`# $2 = LiveCD data dir (with directories /base, /modules, etc.)`	238	`# $2 = LiveCD data dir (with directories /base, /modules, etc.)`
239	`# $3 = destination folder, where images will be mounted to`	239	`# $3 = destination folder, where images will be mounted to`
240	`#`	240	`#`
241	`union_insert_modules()`	241	`union_insert_modules()`
242	`{`	242	`{`
243	PRINTK=`cat /proc/sys/kernel/printk`	243	PRINTK=`cat /proc/sys/kernel/printk`
244	`echo "0" >/proc/sys/kernel/printk`	244	`echo "0" >/proc/sys/kernel/printk`
245		245
246	`list_modules $2 \| while read MODULE; do`	246	`list_modules $2 \| while read MODULE; do`
247	echo " -> `basename $MODULE`"	247	echo " -> `basename $MODULE`"
248	`union_insert_module $1 $MODULE $3`	248	`union_insert_module $1 $MODULE $3`
249	`done`	249	`done`
250		250
251	`echo "$PRINTK" >/proc/sys/kernel/printk`	251	`echo "$PRINTK" >/proc/sys/kernel/printk`
252	`}`	252	`}`
253		253
254	`# Copy modules to RAM directory`	254	`# Copy modules to RAM directory`
255	`# $1 = data directory`	255	`# $1 = data directory`
256	`# $2 = target directory in RAM`	256	`# $2 = target directory in RAM`
257	`#`	257	`#`
258	`copy_to_ram()`	258	`copy_to_ram()`
259	`{`	259	`{`
260	`cp -R $1/* $2`	260	`cp -R $1/* $2`
261	`if [ $? -ne 0 ]; then fatal "can't copy to RAM, not enough memory?"; fi`	261	`if [ $? -ne 0 ]; then fatal "can't copy to RAM, not enough memory?"; fi`
262	`}`	262	`}`
263		263
264	`# Copy content of "rootcopy" directory on the CD to $2 (union, usually)`	264	`# Copy content of "rootcopy" directory on the CD to $2 (union, usually)`
265	`# $1 = source`	265	`# $1 = source`
266	`# $2 = destination`	266	`# $2 = destination`
267	`#`	267	`#`
268	`copy_rootchanges()`	268	`copy_rootchanges()`
269	`{`	269	`{`
270	`cp -a $1/rootcopy/* $2 2>/dev/null # could be empty`	270	`cp -a $1/rootcopy/* $2 2>/dev/null # could be empty`
271	`}`	271	`}`
272		272
273	`# ===========================================================`	273	`# ===========================================================`
274	`# discovery functions`	274	`# discovery functions`
275	`# ===========================================================`	275	`# ===========================================================`
276		276
277	`# List all CD-ROMs`	277	`# List all CD-ROMs`
278	`# by using /proc entries`	278	`# by using /proc entries`
279	`#`	279	`#`
280	`list_cdrom_devices()`	280	`list_cdrom_devices()`
281	`{`	281	`{`
282	if [ "`cmdline_parameter nocd`" != "" ]; then return 1; fi	282	if [ "`cmdline_parameter nocd`" != "" ]; then return 1; fi
283	for CDDEVICE in `cat /proc/sys/dev/cdrom/info \| head -n 3 \| tail -n 1 \| cut -d ":" -f 2`; do	283	for CDDEVICE in `cat /proc/sys/dev/cdrom/info \| head -n 3 \| tail -n 1 \| cut -d ":" -f 2`; do
284	`echo "/dev/$CDDEVICE"`	284	`echo "/dev/$CDDEVICE"`
285	`done`	285	`done`
286	`}`	286	`}`
287		287
288	`# List all partition devices`	288	`# List all partition devices`
289	`# take list of all partitions and output unique disks.`	289	`# take list of all partitions and output unique disks.`
290	`# Return empty result when nohd parameter was given.`	290	`# Return empty result when nohd parameter was given.`
291	`#`	291	`#`
292	`list_partition_devices()`	292	`list_partition_devices()`
293	`{`	293	`{`
294	if [ "`cmdline_parameter nohd`" != "" ]; then return 1; fi	294	if [ "`cmdline_parameter nohd`" != "" ]; then return 1; fi
295	`cat /proc/partitions \| grep -v loop \| sed -r "s/^[0-9[:space:]]+/\/dev\//" \| grep /dev/`	295	`cat /proc/partitions \| grep -v loop \| sed -r "s/^[0-9[:space:]]+/\/dev\//" \| grep /dev/`
296	`}`	296	`}`
297		297
298	`# List all disk devices`	298	`# List all disk devices`
299	`#`	299	`#`
300	`list_disk_devices()`	300	`list_disk_devices()`
301	`{`	301	`{`
302	`list_partition_devices \| egrep -v "[0-9]"`	302	`list_partition_devices \| egrep -v "[0-9]"`
303	`}`	303	`}`
304		304
305	`# List all block devices`	305	`# List all block devices`
306	`#`	306	`#`
307	`list_block_devices()`	307	`list_block_devices()`
308	`{`	308	`{`
309	`list_cdrom_devices`	309	`list_cdrom_devices`
310	`list_partition_devices`	310	`list_partition_devices`
311	`}`	311	`}`
312		312
313	`# Try to mount all disks, partitions and cdroms and Find where the LiveCD is.`	313	`# Try to mount all disks, partitions and cdroms and Find where the LiveCD is.`
314	`# If LiveCD found in the device, echo dirname of it's directory,`	314	`# If LiveCD found in the device, echo dirname of it's directory,`
315	`# and leave the device mounted. Mounting is not ro, but without any argument.`	315	`# and leave the device mounted. Mounting is not ro, but without any argument.`
316	`# $1 = directory where devices will be mounted`	316	`# $1 = directory where devices will be mounted`
317	`# added: mount $NFSROOT to /$1/nfs if NFSROOT is set. and search there for LiveCD`	317	`# added: mount $NFSROOT to /$1/nfs if NFSROOT is set. and search there for LiveCD`
318	`#`	318	`#`
319	`find_live_data_dir()`	319	`find_live_data_dir()`
320	`{`	320	`{`
321	`if [ "$NFSROOT" != "" ]; then`	321	`if [ "$NFSROOT" != "" ]; then`
322	`DIR="/$1/nfs"`	322	`DIR="/$1/nfs"`
323	`mkdir -p $DIR`	323	`mkdir -p $DIR`
324	`# try to mount nfs dir`	324	`# try to mount nfs dir`
325	`mount -t nfs -o $NFSOPT $NFSROOT $DIR`	325	`mount -t nfs -o $NFSOPT $NFSROOT $DIR`
326	`fi`	326	`fi`
327		327
328	`if [ "$CIFSROOT" != "" ]; then`	328	`if [ "$CIFSROOT" != "" ]; then`
329	`DIR="/$1/cifs"`	329	`DIR="/$1/cifs"`
330	`mkdir -p $DIR`	330	`mkdir -p $DIR`
331	`# try to mount cifs dir`	331	`# try to mount cifs dir`
332	`mount -t cifs $CIFSROOT $DIR -o ro,$CIFSOPTS`	332	`mount -t cifs $CIFSROOT $DIR -o ro,$CIFSOPTS`
333	`fi`	333	`fi`
334		334
335	`if [ "$DIR" = "" ]; then`	335	`if [ "$DIR" = "" ]; then`
336	`list_block_devices \| while read DEVICE; do`	336	`list_block_devices \| while read DEVICE; do`
337	DIR="/$1/`basename $DEVICE`"	337	DIR="/$1/`basename $DEVICE`"
338	`mount_device $DEVICE $DIR`	338	`mount_device $DEVICE $DIR`
339	`if [ $? -ne 0 ]; then continue; fi`	339	`if [ $? -ne 0 ]; then continue; fi`
340	# FOUND=`find $DIR -name livecd.sgn -type f \| head -n 1`	340	# FOUND=`find $DIR -name livecd.sgn -type f \| head -n 1`
341	FOUND=`ls -A1d $DIR/livecd.sgn $DIR/*/livecd.sgn 2>/dev/null \| head -n 1`	341	FOUND=`ls -A1d $DIR/livecd.sgn $DIR/*/livecd.sgn 2>/dev/null \| head -n 1`
342	`if [ "$FOUND" = "" ]; then umount $DIR 2>/dev/null; rmdir $DIR 2>/dev/null`	342	`if [ "$FOUND" = "" ]; then umount $DIR 2>/dev/null; rmdir $DIR 2>/dev/null`
343	`else dirname "$FOUND"; return 1; fi`	343	`else dirname "$FOUND"; return 1; fi`
344	`done`	344	`done`
345	`else`	345	`else`
346	# FOUND=`find $DIR -name livecd.sgn -type f \| head -n 1`	346	# FOUND=`find $DIR -name livecd.sgn -type f \| head -n 1`
347	FOUND=`ls -A1d $DIR/livecd.sgn $DIR/*/livecd.sgn 2>/dev/null \| head -n 1`	347	FOUND=`ls -A1d $DIR/livecd.sgn $DIR/*/livecd.sgn 2>/dev/null \| head -n 1`
348	`if [ "$FOUND" != "" ]; then`	348	`if [ "$FOUND" != "" ]; then`
349	`dirname "$FOUND"`	349	`dirname "$FOUND"`
350	`fi`	350	`fi`
351	`fi`	351	`fi`
352	`}`	352	`}`
353		353
354	`# ===========================================================`	354	`# ===========================================================`
355	`# hardware preparation functions`	355	`# hardware preparation functions`
356	`# ===========================================================`	356	`# ===========================================================`
357		357
358	`# Create block devices to /dev described by /sys entries`	358	`# Create block devices to /dev described by /sys entries`
359	`#`	359	`#`
360	`create_block_devices()`	360	`create_block_devices()`
361	`{`	361	`{`
362	`echolog "creating /dev entries for block devices"`	362	`echolog "creating /dev entries for block devices"`
363	`ls -A1d /sys/block//dev /sys/block//*/dev 2>/dev/null \| grep -v loop \| while read BLOCK; do`	363	`ls -A1d /sys/block//dev /sys/block//*/dev 2>/dev/null \| grep -v loop \| while read BLOCK; do`
364	DEVICE="/dev/`basename \`dirname $BLOCK\``"	364	DEVICE="/dev/`basename \`dirname $BLOCK\``"
365	`if [ ! -b $DEVICE ]; then`	365	`if [ ! -b $DEVICE ]; then`
366	MINORMAJOR="`head -n 1 $BLOCK \| tr ':' ' '`"	366	MINORMAJOR="`head -n 1 $BLOCK \| tr ':' ' '`"
367	`mknod $DEVICE b $MINORMAJOR`	367	`mknod $DEVICE b $MINORMAJOR`
368	`fi`	368	`fi`
369	`done`	369	`done`
370	`}`	370	`}`
371		371
372	`# modprobe kernel modules needed for the LiveCD`	372	`# modprobe kernel modules needed for the LiveCD`
373	`#`	373	`#`
374	`modprobe_essential_modules()`	374	`modprobe_essential_modules()`
375	`{`	375	`{`
376	`echolog "starting loop device support"`	376	`echolog "starting loop device support"`
377	`modprobe_module loop max_loop=32`	377	`modprobe_module loop max_loop=32`
378	`echolog "starting cdrom support"`	378	`echolog "starting cdrom support"`
379	`modprobe_module ide_cd`	379	`modprobe_module ide_cd`
380	`modprobe_module ide-cd`	380	`modprobe_module ide-cd`
381	`modprobe_module sr_mod`	381	`modprobe_module sr_mod`
382	`modprobe_module cdrom`	382	`modprobe_module cdrom`
383	`echolog "starting cdrom filesystem support"`	383	`echolog "starting cdrom filesystem support"`
384	`modprobe_module isofs`	384	`modprobe_module isofs`
385	`echolog "starting squashfs support"`	385	`echolog "starting squashfs support"`
386	`modprobe_module squashfs`	386	`modprobe_module squashfs`
387	`echolog "starting unionfs/aufs support"`	387	`echolog "starting unionfs/aufs support"`
388	`modprobe_module unionfs`	388	`modprobe_module unionfs`
389	`modprobe_module aufs`	389	`modprobe_module aufs`
390	`echolog "starting vfat support"`	390	`echolog "starting vfat support"`
391	`# modprobe_module nls_cp437`	391	`# modprobe_module nls_cp437`
392	`# modprobe_module nls_iso8859-1`	392	`# modprobe_module nls_iso8859-1`
393	`# modprobe_module nls_iso8859-2`	393	`# modprobe_module nls_iso8859-2`
394	`modprobe_module vfat`	394	`modprobe_module vfat`
395	`echolog "starting ntfs support"`	395	`echolog "starting ntfs support"`
396	`modprobe_module ntfs`	396	`modprobe_module ntfs`
397	`modprobe_module nls_utf8`	397	`modprobe_module nls_utf8`
398	`create_block_devices`	398	`create_block_devices`
399	`}`	399	`}`
400		400
401		401
402	`# modprobe kernel modules needed for USB masstorage devices`	402	`# modprobe kernel modules needed for USB masstorage devices`
403	`#`	403	`#`
404	`modprobe_usb_sata_modules()`	404	`modprobe_usb_sata_modules()`
405	`{`	405	`{`
406	`echolog "starting USB and SATA support"`	406	`echolog "starting USB and SATA support"`
407	`modprobe_module ehci-hcd`	407	`modprobe_module ehci-hcd`
408	`modprobe_module ohci-hcd`	408	`modprobe_module ohci-hcd`
409	`modprobe_module uhci-hcd`	409	`modprobe_module uhci-hcd`
410	`modprobe_module scsi_mod`	410	`modprobe_module scsi_mod`
411		411
412	`modprobe_module libata`	412	`modprobe_module libata`
413	`modprobe_module ata_piix`	413	`modprobe_module ata_piix`
414	`modprobe_module ahci`	414	`modprobe_module ahci`
415	`modprobe_module sata_nv`	415	`modprobe_module sata_nv`
416	`modprobe_module sg`	416	`modprobe_module sg`
417		417
418	`modprobe_module sd_mod`	418	`modprobe_module sd_mod`
419	`modprobe_module sr_mod`	419	`modprobe_module sr_mod`
420	`modprobe_module usb-storage`	420	`modprobe_module usb-storage`
421	`echolog "waiting for USB devices, max 8 seconds"`	421	`echolog "waiting for USB devices, max 8 seconds"`
422	`sleep 8`	422	`sleep 8`
423	`create_block_devices`	423	`create_block_devices`
424	`}`	424	`}`
425		425
426	`# modprobe nfs kernel modules`	426	`# modprobe nfs kernel modules`
427	`#`	427	`#`
428	`modprobe_nfs_modules()`	428	`modprobe_nfs_modules()`
429	`{`	429	`{`
430	`echolog "starting nfs support"`	430	`echolog "starting nfs support"`
431	`modprobe_module lockd`	431	`modprobe_module lockd`
432	`modprobe_module fscache`	432	`modprobe_module fscache`
433	`modprobe_module nfs_acl`	433	`modprobe_module nfs_acl`
434	`modprobe_module nfs`	434	`modprobe_module nfs`
435	`}`	435	`}`
436		436
437	`# modprobe cifs kernel module`	437	`# modprobe cifs kernel module`
438	`#`	438	`#`
439	`modprobe_cifs_modules()`	439	`modprobe_cifs_modules()`
440	`{`	440	`{`
441	`echolog "starting cifs support"`	441	`echolog "starting cifs support"`
442	`modprobe_module cifs`	442	`modprobe_module cifs`
443	`}`	443	`}`
444		444
445	`# enable/disable CD autoejecting when unmounted`	445	`# enable/disable CD autoejecting when unmounted`
446	`# $1 = 1\|0 ... enable\|disable`	446	`# $1 = 1\|0 ... enable\|disable`
447	`#`	447	`#`
448	`cd_autoeject()`	448	`cd_autoeject()`
449	`{`	449	`{`
450	`echo $1 >/proc/sys/dev/cdrom/autoeject`	450	`echo $1 >/proc/sys/dev/cdrom/autoeject`
451	`}`	451	`}`
452		452
453	`# Disable DMA if nodma boot parameter is present`	453	`# Disable DMA if nodma boot parameter is present`
454	`#`	454	`#`
455	`setup_dma()`	455	`setup_dma()`
456	`{`	456	`{`
457	if [ ! "`cmdline_parameter nodma`" = "" ]; then	457	if [ ! "`cmdline_parameter nodma`" = "" ]; then
458	for DEVICE in `list_cdrom_devices` `list_disk_devices`; do	458	for DEVICE in `list_cdrom_devices` `list_disk_devices`; do
459	`echolog "setting DMA support off for $DEVICE"`	459	`echolog "setting DMA support off for $DEVICE"`
460	`hdparm -d 0 $DEVICE`	460	`hdparm -d 0 $DEVICE`
461	`done`	461	`done`
462	`fi`	462	`fi`
463	`}`	463	`}`
464		464
465	`# create correct fstab file in $1/etc/fstab and create apropriate`	465	`# create correct fstab file in $1/etc/fstab and create apropriate`
466	`# mount directories in $1`	466	`# mount directories in $1`
467	`# $1 = root directory (union)`	467	`# $1 = root directory (union)`
468	`#`	468	`#`
469	`activate_fstab()`	469	`activate_fstab()`
470	`{`	470	`{`
471	`mkdir -p $1/etc`	471	`mkdir -p $1/etc`
472	`FSTAB="$1/etc/fstab"`	472	`FSTAB="$1/etc/fstab"`
473	`echo "tmpfs / tmpfs defaults 0 0" >$FSTAB`	473	`echo "tmpfs / tmpfs defaults 0 0" >$FSTAB`
474	`echo "devpts /dev/pts devpts gid=5,mode=620 0 0" >>$FSTAB`	474	`echo "devpts /dev/pts devpts gid=5,mode=620 0 0" >>$FSTAB`
475	`echo "proc /proc proc defaults 0 0" >>$FSTAB`	475	`echo "proc /proc proc defaults 0 0" >>$FSTAB`
476		476
477	`# all the rest will be done by runlast or by fstab-sync`	477	`# all the rest will be done by runlast or by fstab-sync`
478	`# search for SWAP done later in /etc/rc.sysinit`	478	`# search for SWAP done later in /etc/rc.sysinit`
479	`}`	479	`}`
480		480
481		481
482	`# find partition and/or folder that stores the changes`	482	`# find partition and/or folder that stores the changes`
483	`# return false, if changes not set or changes folder/partition not found`	483	`# return false, if changes not set or changes folder/partition not found`
484	`# Urs Beyerle`	484	`# Urs Beyerle`
485	`#`	485	`#`
486	`find_changes()`	486	`find_changes()`
487	`{`	487	`{`
488	`echolog "looking for changes in $CHANGESVAL"`	488	`echolog "looking for changes in $CHANGESVAL"`
489		489
490	CHANGESDEV="`echo "$CHANGESVAL" \| egrep -o "^/dev/[^/]+"`"	490	CHANGESDEV="`echo "$CHANGESVAL" \| egrep -o "^/dev/[^/]+"`"
491	CHANGESFOLDER="`echo "$CHANGESVAL" \| sed -r 's:^/dev/[^/]+(.*):\1:'`"	491	CHANGESFOLDER="`echo "$CHANGESVAL" \| sed -r 's:^/dev/[^/]+(.*):\1:'`"
492	`# (re-)define CHANGES if CHANGESFOLDER is set`	492	`# (re-)define CHANGES if CHANGESFOLDER is set`
493	`if [ "$CHANGESFOLDER" != "" ]; then CHANGES=$MEMORY/$CHANGESFOLDER; fi`	493	`if [ "$CHANGESFOLDER" != "" ]; then CHANGES=$MEMORY/$CHANGESFOLDER; fi`
494		494
495	`# we may need usb and sata support`	495	`# we may need usb and sata support`
496	`modprobe_usb_sata_modules`	496	`modprobe_usb_sata_modules`
497		497
498	`# device defined?`	498	`# device defined?`
499	`if [ "$CHANGESDEV" != "" ]; then`	499	`if [ "$CHANGESDEV" != "" ]; then`
500	`mount_device $CHANGESDEV $MEMORY`	500	`mount_device $CHANGESDEV $MEMORY`

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