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echolog "mounting /proc and /sys filesystems"
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echolog "mounting /proc and /sys filesystems"
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mount -t proc proc /proc
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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mount -t sysfs sysfs /sys
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ln -sf /proc/mounts /etc/mtab # this allows us to use umount -a
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# setup DEBUGCMD variable. If debug boot option is present, call debug()
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# setup DEBUGCMD variable. If debug boot option is present, call debug()
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# function several times during script's execution
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# function several times during script's execution
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if [ "`cmdline_parameter debug`" ]; then DEBUGCMD="debug"; else DEBUGCMD=""; fi
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if [ "`cmdline_parameter debug`" ]; then DEBUGCMD="debug"; else DEBUGCMD=""; fi
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$DEBUGCMD
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$DEBUGCMD
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# amount of RAM to store changes
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RAMSIZE="`cmdline_value ramsize`"
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if [ "$RAMSIZE" = "" ]; then RAMSIZE="70%"; fi
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# I have to set these variables very carefully
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# I have to set these variables very carefully
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UNION=/union
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UNION=/union
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MEMORY=/memory
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MEMORY=/memory
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#MOUNTDIR=mnt
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#MOUNTDIR=mnt
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MOUNTDIR=livecd
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MOUNTDIR=livecd
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modprobe_essential_modules
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modprobe_essential_modules
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setup_dma
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setup_dma
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$DEBUGCMD
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$DEBUGCMD
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# load network modules, if NFSROOT is set
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# if NFSROOT is set:
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echolog "check for nfsroot"
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echolog "check for nfsroot"
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if [ "$NFSROOT" != "" ]; then
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if [ "$NFSROOT" != "" ]; then
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   echolog "nfsroot: $NFSROOT"
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   # mii maybe need by NIC
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   echolog "load module mii"
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   modprobe_module mii
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   # detecting network card
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   PCITABLE=/bin/pcitable
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   NICS=`lspci -n | awk '/Class 0200/ {print $4}' | tr ':' ' ' \
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   | while read x y ; do grep "0x$x.*0x$y" $PCITABLE \
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   | awk '$3 !~ /"unknown"/ {print $3}' | tr -d '"' ; done`
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   echolog "Found network card(s): $NICS"
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   if [ -n "$NICS" ]; then
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       echo $NICS | while read nic ; do
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	   echo "Loading module $nic"
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	   modprobe_module $nic
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       done
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   else
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       echo "ERROR: No network card detected!"
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       echo "Type in your network card driver (e.g. tg3, e1000). "
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       echo "Or ask your system administrator for help."
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       echo -n "Network card driver: "
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       read nic
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       echo "Loading module $nic"
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       modprobe_module $nic
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   fi
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fi
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   # load network modules, if NFSROOT is set
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   echolog "nfsroot: $NFSROOT"
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$DEBUGCMD
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   load_network_modules
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# get DHCP lease
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if [ "$NFSROOT" != "" ]; then
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    # create /dev/urandom (needed by udhcpc)
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    mknod /dev/urandom c 1 9
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    echolog "Try to get DHCP lease on eth0"
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    udhcpc --now --quit --interface=eth0 --script=/bin/udhcpc.script
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    if [ $? -ne 0 ]; then
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	echo "ERROR: couldn't get DHCP lease, trying again"
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	udhcpc --now --quit --interface=eth0 --script=/bin/udhcpc.script
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	if [ $? -ne 0 ]; then
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	    echo "ERROR: couldn't get DHCP lease, trying eth1"
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	    udhcpc --now --quit --interface=eth1 --script=/bin/udhcpc.script
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	    if [ $? -ne 0 ]; then
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		echo "ERROR: couldn't get DHCP lease, trying again eth1"
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		udhcpc --now --quit --interface=eth1 --script=/bin/udhcpc.script
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		if [ $? -ne 0 ]; then
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		    echo "ERROR: can't get DHCP lease on eth0 and eth1"
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		fi
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	    fi
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	fi
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    fi
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   $DEBUGCMD
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fi
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   # get DHCP lease
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   echolog "get DHCP lease"
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   get_dhcp_lease
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$DEBUGCMD
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   $DEBUGCMD
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# we need nfs modules loaded, if NFSROOT is set
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    # we need nfs modules loaded, if NFSROOT is set
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if [ "$NFSROOT" != "" ]; then
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    modprobe_nfs_modules
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    modprobe_nfs_modules
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fi
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fi
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$DEBUGCMD
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$DEBUGCMD
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# $UNION will be used as a root directory, livecd modules will be added soon.
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# $UNION will be used as a root directory, livecd modules will be added soon.
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   mount_device $CHANGESDEV $MEMORY
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   mount_device $CHANGESDEV $MEMORY
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else false; fi
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else false; fi
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# mount tmpfs only in the case when changes= boot parameter was empty
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# mount tmpfs only in the case when changes= boot parameter was empty
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# or we were not able to mount the storage device
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# or we were not able to mount the storage device
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if [ $? -ne 0 ]; then mount -t tmpfs -o "size=80%" tmpfs $MEMORY; fi
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if [ $? -ne 0 ]; then mount -t tmpfs -o "size=$RAMSIZE" tmpfs $MEMORY; fi
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mkdir -p $CHANGES
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mkdir -p $CHANGES
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mkdir -p $COPY2RAM
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mkdir -p $COPY2RAM
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mkdir -p $IMAGES
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mkdir -p $IMAGES
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mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION
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mount -t unionfs -o dirs=$CHANGES=rw unionfs $UNION
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# More likely these directories aren't there.
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# More likely these directories aren't there.
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# Even if they are, this won't hurt.
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# Even if they are, this won't hurt.
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mkdir -p $UNION/proc
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mkdir -p $UNION/proc
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mkdir -p $UNION/sys
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mkdir -p $UNION/sys
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mkdir -p $UNION/tmp
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mkdir -p $UNION/tmp
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chmod 1777 $UNION/tmp
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mkdir -p $UNION/dev
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mkdir -p $UNION/dev
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mkdir -p $UNION/initrd
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$DEBUGCMD
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$DEBUGCMD
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# Union contains all the files and directories unioned from all modules.
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# Union contains all the files and directories unioned from all modules.
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# Change root directory to it, and move initrd's root to /livecd/live/initramdisk
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# Change root directory to it, and move initrd's root to /livecd/live/initramdisk
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cat $UNION/bin/true >/dev/null
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cat $UNION/bin/true >/dev/null
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$DEBUGCMD
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$DEBUGCMD
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pivot_root . $INITRAMDISK
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pivot_root . $INITRAMDISK
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exec $CHROOT . sbin/init <dev/console >dev/console 2>&1; fi
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exec $CHROOT . sbin/init <dev/console >dev/console 2>&1
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header "ERROR!"
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header "ERROR!"
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echolog "You are not supposed to be here, something went wrong!"
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echolog "You are not supposed to be here, something went wrong!"
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echolog "Even Ctrl+Alt+Del won't help you in kernel panic."
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echolog "Even Ctrl+Alt+Del won't help you in kernel panic."
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