FOUND_ISO=
RAMSIZE=100000

msg ":: Creating new root ramdisk (dinamic size=${RAMSIZE}k) on /dev/shm..."
mkdir /newroot
/bin/mount -t tmpfs -o "size=${RAMSIZE}k" /dev/shm /newroot
mkdir -p /newroot/flash /newroot/cdrom /newroot/squashfs

#
# findiso(): looks for ISO9660 images stored in flash root
#
findiso(){
   msg ":: Looking for openmamba ISO cdrom images"

   # try removable devices only
   for i in /newroot/flash/openmamba-*.iso; do
         /bin/losetup /dev/loop0 $i
         if mount -r -t iso9660 /dev/loop0 /newroot/cdrom >/dev/null 2>&1; then
            if test -r /newroot/cdrom/rootfs.compressed; then
               msg ":: Valid ISO image $i found..."
               FOUND_ISO="$i"
               return 0
            fi
            umount /newroot/cdrom
         fi
         /bin/losetup /dev/loop0
   done
   return 1
}

#/sbin/splash_util -c repaint ${splash_add} -t default --mesg="Looking for cdrom device" --progress="4444"

while true; do
   msg ":: root device is ${root}"
   if ! mount -t ext3 ${root} /newroot/flash >/dev/null 2>&1; then
      if ! mount -t ext2 ${root} /newroot/flash >/dev/null 2>&1; then
         err ":: Unable to mount USB rootfs. Supported filesystems are ext2 and ext3."
      fi
   fi
   findiso
   if [ "$FOUND_ISO" ]; then
#      /sbin/splash_util -c repaint ${splash_add} -t default --mesg="Mounting compressed filesystem" --progress="5555"
      msg ":: Mounting compressed filesystem"
      /bin/losetup /dev/loop1 /newroot/cdrom/rootfs.compressed
      mount -r -t squashfs /dev/loop1 /newroot/squashfs

      msg ":: Creating directories and symlinks on ramdisk..."

      mkdir -p \
            /newroot/tmp /newroot/proc /newroot/sys \
            /newroot/initrd /newroot/mnt /newroot/media \
            /newroot/oldroot

      ln -s squashfs/bin /newroot/bin
      ln -s squashfs/boot /newroot/boot
      ln -s squashfs/lib /newroot/lib
      ln -s squashfs/opt /newroot/opt
      ln -s squashfs/sbin /newroot/sbin
      ln -s squashfs/srv /newroot/srv
      ln -s squashfs/usr /newroot/usr

      chroot /newroot /bin/cp -a \
          /squashfs/dev /squashfs/home /squashfs/var \
          /squashfs/etc /squashfs/root /

      # Create empty utmp and wtmp
      :> /newroot/var/run/utmp
      :> /newroot/var/run/wtmp

      [ "${init}" ] || init=/sbin/init
      msg ":: Running init, runlevel:${runlevel}"
      exec run-init /newroot ${init} ${runlevel}
      exit 0
   else
      msg ":: Could not find a valid ISO image; opening a command prompt."
      /bin/sh.shared
   fi
done