Raspi2-3_GenImage Commit - r459:816670ca587b · Collaboration Tremplin des Sciences

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bootstrap.d/13-kernel.sh +3 -3

             #
             # Build and Setup RPi2/3 Kernel
             #
             # Load utility functions
             . ./functions.sh
             # Fetch and build latest raspberry kernel
             if [ "$BUILD_KERNEL" = true ] ; then
               # Setup source directory
               mkdir -p "${KERNEL_DIR}"
               # Copy existing kernel sources into chroot directory
               if [ -n "$KERNELSRC_DIR" ] && [ -d "$KERNELSRC_DIR" ] ; then
                 # Copy kernel sources and include hidden files
                 cp -r "${KERNELSRC_DIR}/". "${KERNEL_DIR}"
                 # Clean the kernel sources
                 if [ "$KERNELSRC_CLEAN" = true ] && [ "$KERNELSRC_PREBUILT" = false ] ; then
                   make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" mrproper
                 fi
               else # KERNELSRC_DIR=""
                 # Create temporary directory for kernel sources
                 temp_dir=$(as_nobody mktemp -d)
                 # Fetch current RPi2/3 kernel sources
                 if [ -z "${KERNEL_BRANCH}" ] ; then
                   as_nobody -H git -C "${temp_dir}" clone --depth=1 "${KERNEL_URL}" linux
                 else
                   as_nobody -H git -C "${temp_dir}" clone --depth=1 --branch "${KERNEL_BRANCH}" "${KERNEL_URL}" linux
                 fi
                 # Copy downloaded kernel sources
                 cp -r "${temp_dir}/linux/"* "${KERNEL_DIR}"
                 # Remove temporary directory for kernel sources
                 rm -fr "${temp_dir}"
                 # Set permissions of the kernel sources
                 chown -R root:root "${R}/usr/src"
               fi
               # Calculate optimal number of kernel building threads
               if [ "$KERNEL_THREADS" = "1" ] && [ -r /proc/cpuinfo ] ; then
                 KERNEL_THREADS=$(grep -c processor /proc/cpuinfo)
               fi
               # Configure and build kernel
               if [ "$KERNELSRC_PREBUILT" = false ] ; then
                 # Remove device, network and filesystem drivers from kernel configuration
                 if [ "$KERNEL_REDUCE" = true ] ; then
                   make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" "${KERNEL_DEFCONFIG}"
                   sed -i\
                   -e "s/\(^CONFIG_SND.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_SOUND.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_AC97.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_VIDEO_.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_MEDIA_TUNER.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_DVB.*\=\)[ym]/\1n/"\
                   -e "s/\(^CONFIG_REISERFS.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_JFS.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_XFS.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_GFS2.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_OCFS2.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_BTRFS.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_HFS.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_JFFS2.*\=\)[ym]/\1n/"\
                   -e "s/\(^CONFIG_UBIFS.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_SQUASHFS.*\=\)[ym]/\1n/"\
                   -e "s/\(^CONFIG_W1.*\=\)[ym]/\1n/"\
                   -e "s/\(^CONFIG_HAMRADIO.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_CAN.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_IRDA.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_BT_.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_WIMAX.*\=\)[ym]/\1n/"\
                   -e "s/\(^CONFIG_6LOWPAN.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_IEEE802154.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_NFC.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_FB_TFT=.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_TOUCHSCREEN.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_USB_GSPCA_.*\=\).*/\1n/"\
                   -e "s/\(^CONFIG_DRM.*\=\).*/\1n/"\
                   "${KERNEL_DIR}/.config"
                 fi
                 if [ "$KERNELSRC_CONFIG" = true ] ; then
                   # Load default raspberry kernel configuration
                   make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" "${KERNEL_DEFCONFIG}"
                   #Switch to KERNELSRC_DIR so we can use set_kernel_config
                   cd "${KERNEL_DIR}" || exit
             	  # enable ZSWAP see https://askubuntu.com/a/472227 or https://wiki.archlinux.org/index.php/zswap
-                  if [ "$KERNEL_ZSWAP" = true ] && { [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; } ; then
+                  if [ "$KERNEL_ZSWAP" = true ] ; then
                     set_kernel_config CONFIG_ZPOOL y
                     set_kernel_config CONFIG_ZSWAP y
                     set_kernel_config CONFIG_ZBUD y
                     set_kernel_config CONFIG_Z3FOLD y
                     set_kernel_config CONFIG_ZSMALLOC y
                     set_kernel_config CONFIG_PGTABLE_MAPPING y
             	  fi
                   # enable basic KVM support; see https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=210546&start=25#p1300453
             	  if [ "$KERNEL_VIRT" = true ] && { [ "$RPI_MODEL" = 2 ] || [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; } ; then
                     set_kernel_config CONFIG_VIRTUALIZATION y
                     set_kernel_config CONFIG_KVM y
                     set_kernel_config CONFIG_VHOST_NET m
                     set_kernel_config CONFIG_VHOST_CROSS_ENDIAN_LEGACY y
             	  fi
                   # Netfilter kernel support See https://github.com/raspberrypi/linux/issues/2177#issuecomment-354647406
-            	  if [ "$KERNEL_NF" = true ] && { [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; } ; then
+            	  if [ "$KERNEL_NF" = true ] ; then
             		set_kernel_config CONFIG_IP_NF_TARGET_SYNPROXY m
             		set_kernel_config CONFIG_NETFILTER_XT_MATCH_CGROUP m
             		set_kernel_config CONFIG_NETFILTER_XT_MATCH_IPCOMP m
             		set_kernel_config CONFIG_NETFILTER_XT_MATCH_SOCKET m
             		set_kernel_config CONFIG_NFT_FIB_INET m
             		set_kernel_config CONFIG_NFT_FIB_IPV4 m
             		set_kernel_config CONFIG_NFT_FIB_IPV6 m
             		set_kernel_config CONFIG_NFT_FIB_NETDEV m
             		set_kernel_config CONFIG_NFT_OBJREF m
             		set_kernel_config CONFIG_NFT_RT m
             		set_kernel_config CONFIG_NFT_SET_BITMAP m
             		set_kernel_config CONFIG_NF_CONNTRACK_TIMEOUT y
             		set_kernel_config CONFIG_NF_LOG_ARP m
             		set_kernel_config CONFIG_NF_SOCKET_IPV4 m
             		set_kernel_config CONFIG_NF_SOCKET_IPV6 m
                     set_kernel_config CONFIG_BRIDGE_EBT_BROUTE m
                     set_kernel_config CONFIG_BRIDGE_EBT_T_FILTER m
                     set_kernel_config CONFIG_BRIDGE_NF_EBTABLES m
                     set_kernel_config CONFIG_IP6_NF_IPTABLES m
                     set_kernel_config CONFIG_IP6_NF_MATCH_AH m
                     set_kernel_config CONFIG_IP6_NF_MATCH_EUI64 m
                     set_kernel_config CONFIG_IP6_NF_NAT m
                     set_kernel_config CONFIG_IP6_NF_TARGET_MASQUERADE m
                     set_kernel_config CONFIG_IP6_NF_TARGET_NPT m
                     set_kernel_config CONFIG_IP_SET_BITMAP_IPMAC m
                     set_kernel_config CONFIG_IP_SET_BITMAP_PORT m
                     set_kernel_config CONFIG_IP_SET_HASH_IP m
                     set_kernel_config CONFIG_IP_SET_HASH_IPMARK m
                     set_kernel_config CONFIG_IP_SET_HASH_IPPORT m
                     set_kernel_config CONFIG_IP_SET_HASH_IPPORTIP m
                     set_kernel_config CONFIG_IP_SET_HASH_IPPORTNET m
                     set_kernel_config CONFIG_IP_SET_HASH_MAC m
                     set_kernel_config CONFIG_IP_SET_HASH_NET m
                     set_kernel_config CONFIG_IP_SET_HASH_NETIFACE m
                     set_kernel_config CONFIG_IP_SET_HASH_NETNET m
                     set_kernel_config CONFIG_IP_SET_HASH_NETPORT m
                     set_kernel_config CONFIG_IP_SET_HASH_NETPORTNET m
                     set_kernel_config CONFIG_IP_SET_LIST_SET m
                     set_kernel_config CONFIG_NETFILTER_XTABLES m
                     set_kernel_config CONFIG_NETFILTER_XTABLES m
                     set_kernel_config CONFIG_NFT_BRIDGE_META m
                     set_kernel_config CONFIG_NFT_BRIDGE_REJECT m
                     set_kernel_config CONFIG_NFT_CHAIN_NAT_IPV4 m
                     set_kernel_config CONFIG_NFT_CHAIN_NAT_IPV6 m
                     set_kernel_config CONFIG_NFT_CHAIN_ROUTE_IPV4 m
                     set_kernel_config CONFIG_NFT_CHAIN_ROUTE_IPV6 m
                     set_kernel_config CONFIG_NFT_COMPAT m
                     set_kernel_config CONFIG_NFT_COUNTER m
                     set_kernel_config CONFIG_NFT_CT m
                     set_kernel_config CONFIG_NFT_DUP_IPV4 m
                     set_kernel_config CONFIG_NFT_DUP_IPV6 m
                     set_kernel_config CONFIG_NFT_DUP_NETDEV m
                     set_kernel_config CONFIG_NFT_EXTHDR m
                     set_kernel_config CONFIG_NFT_FWD_NETDEV m
                     set_kernel_config CONFIG_NFT_HASH m
                     set_kernel_config CONFIG_NFT_LIMIT m
                     set_kernel_config CONFIG_NFT_LOG m
                     set_kernel_config CONFIG_NFT_MASQ m
                     set_kernel_config CONFIG_NFT_MASQ_IPV4 m
                     set_kernel_config CONFIG_NFT_MASQ_IPV6 m
                     set_kernel_config CONFIG_NFT_META m
                     set_kernel_config CONFIG_NFT_NAT m
                     set_kernel_config CONFIG_NFT_NUMGEN m
                     set_kernel_config CONFIG_NFT_QUEUE m
                     set_kernel_config CONFIG_NFT_QUOTA m
                     set_kernel_config CONFIG_NFT_REDIR m
                     set_kernel_config CONFIG_NFT_REDIR_IPV4 m
                     set_kernel_config CONFIG_NFT_REDIR_IPV6 m
                     set_kernel_config CONFIG_NFT_REJECT m
                     set_kernel_config CONFIG_NFT_REJECT_INET m
                     set_kernel_config CONFIG_NFT_REJECT_IPV4 m
                     set_kernel_config CONFIG_NFT_REJECT_IPV6 m
                     set_kernel_config CONFIG_NFT_SET_HASH m
                     set_kernel_config CONFIG_NFT_SET_RBTREE m
                     set_kernel_config CONFIG_NF_CONNTRACK_IPV4 m
                     set_kernel_config CONFIG_NF_CONNTRACK_IPV6 m
                     set_kernel_config CONFIG_NF_DEFRAG_IPV4 m
                     set_kernel_config CONFIG_NF_DEFRAG_IPV6 m
                     set_kernel_config CONFIG_NF_DUP_IPV4 m
                     set_kernel_config CONFIG_NF_DUP_IPV6 m
                     set_kernel_config CONFIG_NF_DUP_NETDEV m
                     set_kernel_config CONFIG_NF_LOG_BRIDGE m
                     set_kernel_config CONFIG_NF_LOG_IPV4 m
                     set_kernel_config CONFIG_NF_LOG_IPV6 m
                     set_kernel_config CONFIG_NF_NAT_IPV4 m
                     set_kernel_config CONFIG_NF_NAT_IPV6 m
                     set_kernel_config CONFIG_NF_NAT_MASQUERADE_IPV4 m
                     set_kernel_config CONFIG_NF_NAT_MASQUERADE_IPV6 m
                     set_kernel_config CONFIG_NF_NAT_PPTP m
                     set_kernel_config CONFIG_NF_NAT_PROTO_GRE m
                     set_kernel_config CONFIG_NF_NAT_REDIRECT m
                     set_kernel_config CONFIG_NF_NAT_SIP m
                     set_kernel_config CONFIG_NF_NAT_SNMP_BASIC m
                     set_kernel_config CONFIG_NF_NAT_TFTP m
                     set_kernel_config CONFIG_NF_REJECT_IPV4 m
                     set_kernel_config CONFIG_NF_REJECT_IPV6 m
                     set_kernel_config CONFIG_NF_TABLES m
                     set_kernel_config CONFIG_NF_TABLES_ARP m
                     set_kernel_config CONFIG_NF_TABLES_BRIDGE m
                     set_kernel_config CONFIG_NF_TABLES_INET m
                     set_kernel_config CONFIG_NF_TABLES_IPV4 m
                     set_kernel_config CONFIG_NF_TABLES_IPV6 m
                     set_kernel_config CONFIG_NF_TABLES_NETDEV m
                   fi
             	  # Enables BPF syscall for systemd-journald see https://github.com/torvalds/linux/blob/master/init/Kconfig#L848 or https://groups.google.com/forum/#!topic/linux.gentoo.user/_2aSc_ztGpA
-            	  if [ "$KERNEL_BPF" = true ] && { [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; } ; then
+            	  if [ "$KERNEL_BPF" = true ] ; then
                     set_kernel_config CONFIG_BPF_SYSCALL y
             		set_kernel_config CONFIG_BPF_EVENTS y
             		set_kernel_config CONFIG_BPF_STREAM_PARSER y
             	    set_kernel_config CONFIG_CGROUP_BPF y
             	  fi
             	  # KERNEL_DEFAULT_GOV was set by user
             	  if ! [ "$KERNEL_DEFAULT_GOV" = POWERSAVE ] && [ -n "$KERNEL_DEFAULT_GOV" ]; then
             	    # unset default governor
             	    unset_kernel_config CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE
             	    case "$KERNEL_DEFAULT_GOV" in
                       "PERFORMANCE")
             	        set_kernel_config CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE y
                         ;;
                       "USERSPACE")
                         set_kernel_config CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE y
                         ;;
                       "ONDEMAND")
             		    set_kernel_config CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND y
                         ;;
                       "CONSERVATIVE")
             		    set_kernel_config CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE y
             		    ;;
                       "CONSERVATIVE")
             		    set_kernel_config CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL y
                         ;;
                       *)
                         echo "error: unsupported default cpu governor"
                         exit 1
                         ;;
                     esac
             	  fi
             	  #Revert to previous directory
             	  cd "${WORKDIR}" || exit
                   # Set kernel configuration parameters to enable qemu emulation
                   if [ "$ENABLE_QEMU" = true ] ; then
                     echo "CONFIG_FHANDLE=y" >> "${KERNEL_DIR}"/.config
                     echo "CONFIG_LBDAF=y" >> "${KERNEL_DIR}"/.config
                     if [ "$ENABLE_CRYPTFS" = true ] ; then
                       {
                         echo "CONFIG_EMBEDDED=y"
                         echo "CONFIG_EXPERT=y"
                         echo "CONFIG_DAX=y"
                         echo "CONFIG_MD=y"
                         echo "CONFIG_BLK_DEV_MD=y"
                         echo "CONFIG_MD_AUTODETECT=y"
                         echo "CONFIG_BLK_DEV_DM=y"
                         echo "CONFIG_BLK_DEV_DM_BUILTIN=y"
                         echo "CONFIG_DM_CRYPT=y"
                         echo "CONFIG_CRYPTO_BLKCIPHER=y"
                         echo "CONFIG_CRYPTO_CBC=y"
                         echo "CONFIG_CRYPTO_XTS=y"
                         echo "CONFIG_CRYPTO_SHA512=y"
                         echo "CONFIG_CRYPTO_MANAGER=y"
                       } >> "${KERNEL_DIR}"/.config
                     fi
                   fi
                   # Copy custom kernel configuration file
                   if [ -n "$KERNELSRC_USRCONFIG" ] ; then
                     cp "$KERNELSRC_USRCONFIG" "${KERNEL_DIR}"/.config
                   fi
                   # Set kernel configuration parameters to their default values
                   if [ "$KERNEL_OLDDEFCONFIG" = true ] ; then
                     make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" olddefconfig
                   fi
                   # Start menu-driven kernel configuration (interactive)
                   if [ "$KERNEL_MENUCONFIG" = true ] ; then
                     make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" menuconfig
                   fi
             	# end if "$KERNELSRC_CONFIG" = true
                 fi
                 # Use ccache to cross compile the kernel
                 if [ "$KERNEL_CCACHE" = true ] ; then
                   cc="ccache ${CROSS_COMPILE}gcc"
                 else
                   cc="${CROSS_COMPILE}gcc"
                 fi
                 # Cross compile kernel and dtbs
                 make -C "${KERNEL_DIR}" -j"${KERNEL_THREADS}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" CC="${cc}" "${KERNEL_BIN_IMAGE}" dtbs
                 # Cross compile kernel modules
                 if grep -q "CONFIG_MODULES=y" "${KERNEL_DIR}/.config" ; then
                   make -C "${KERNEL_DIR}" -j"${KERNEL_THREADS}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" CC="${cc}" modules
                 fi
               # end if "$KERNELSRC_PREBUILT" = false
               fi
               # Check if kernel compilation was successful
               if [ ! -r "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/${KERNEL_BIN_IMAGE}" ] ; then
                 echo "error: kernel compilation failed! (kernel image not found)"
                 cleanup
                 exit 1
               fi
               # Install kernel modules
               if [ "$ENABLE_REDUCE" = true ] ; then
                 if grep -q "CONFIG_MODULES=y" "${KERNEL_DIR}/.config" ; then
                   make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" INSTALL_MOD_STRIP=1 INSTALL_MOD_PATH=../../.. modules_install
                 fi
               else
                 if grep -q "CONFIG_MODULES=y" "${KERNEL_DIR}/.config" ; then
                   make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" INSTALL_MOD_PATH=../../.. modules_install
                 fi
                 # Install kernel firmware
                 if grep -q "^firmware_install:" "${KERNEL_DIR}/Makefile" ; then
                   make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" INSTALL_FW_PATH=../../../lib firmware_install
                 fi
               fi
               # Install kernel headers
               if [ "$KERNEL_HEADERS" = true ] && [ "$KERNEL_REDUCE" = false ] ; then
                 make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" INSTALL_HDR_PATH=../.. headers_install
               fi
             # make tar.gz kernel package - missing os bzw. modules
             #** ** **  WARNING  ** ** **
             #Your architecture did not define any architecture-dependent files
             #to be placed into the tarball. Please add those to ./scripts/package/buildtar .
             #  make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" CC="${cc}" targz-pkg
               # Prepare boot (firmware) directory
               mkdir "${BOOT_DIR}"
               # Get kernel release version
               KERNEL_VERSION=$(cat "${KERNEL_DIR}/include/config/kernel.release")
               # Copy kernel configuration file to the boot directory
               install_readonly "${KERNEL_DIR}/.config" "${R}/boot/config-${KERNEL_VERSION}"
               # Prepare device tree directory
               mkdir "${BOOT_DIR}/overlays"
               # Ensure the proper .dtb is located
               if [ "$KERNEL_ARCH" = "arm" ] ; then
                 for dtb in "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/dts/"*.dtb ; do
                   if [ -f "${dtb}" ] ; then
                     install_readonly "${dtb}" "${BOOT_DIR}/"
                   fi
                 done
               else
                 for dtb in "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/dts/broadcom/"*.dtb ; do
                   if [ -f "${dtb}" ] ; then
                     install_readonly "${dtb}" "${BOOT_DIR}/"
                   fi
                 done
               fi
               # Copy compiled dtb device tree files
               if [ -d "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/dts/overlays" ] ; then
                 for dtb in "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/dts/overlays/"*.dtb ; do
                   if [ -f "${dtb}" ] ; then
                     install_readonly "${dtb}" "${BOOT_DIR}/overlays/"
                   fi
                 done
                 if [ -f "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/dts/overlays/README" ] ; then
                   install_readonly "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/dts/overlays/README" "${BOOT_DIR}/overlays/README"
                 fi
               fi
               if [ "$ENABLE_UBOOT" = false ] ; then
                 # Convert and copy kernel image to the boot directory
                 "${KERNEL_DIR}/scripts/mkknlimg" "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/${KERNEL_BIN_IMAGE}" "${BOOT_DIR}/${KERNEL_IMAGE}"
               else
                 # Copy kernel image to the boot directory
                 install_readonly "${KERNEL_DIR}/arch/${KERNEL_ARCH}/boot/${KERNEL_BIN_IMAGE}" "${BOOT_DIR}/${KERNEL_IMAGE}"
               fi
               # Remove kernel sources
               if [ "$KERNEL_REMOVESRC" = true ] ; then
                 rm -fr "${KERNEL_DIR}"
               else
                 # Prepare compiled kernel modules
                 if grep -q "CONFIG_MODULES=y" "${KERNEL_DIR}/.config" ; then
                   if grep -q "^modules_prepare:" "${KERNEL_DIR}/Makefile" ; then
                     make -C "${KERNEL_DIR}" ARCH="${KERNEL_ARCH}" CROSS_COMPILE="${CROSS_COMPILE}" modules_prepare
                   fi
                   # Create symlinks for kernel modules
                   chroot_exec ln -sf /usr/src/linux "/lib/modules/${KERNEL_VERSION}/build"
                   chroot_exec ln -sf /usr/src/linux "/lib/modules/${KERNEL_VERSION}/source"
                 fi
               fi
             else # BUILD_KERNEL=false
               #  echo Install precompiled kernel...
               #  echo error: not implemented
               if [ "$KERNEL_ARCH" = arm64 ] && { [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; } ; then
                 # Create temporary directory for dl
                 temp_dir=$(as_nobody mktemp -d)
                 # Fetch kernel dl
                 as_nobody wget -O "${temp_dir}"/kernel.tar.xz -c "$RPI3_64_KERNEL_URL"
                 #extract download
                 tar -xJf "${temp_dir}"/kernel.tar.xz -C "${temp_dir}"
                 #move extracted kernel to /boot/firmware
                 mkdir "${R}/boot/firmware"
                 cp "${temp_dir}"/boot/* "${R}"/boot/firmware/
                 cp -r "${temp_dir}"/lib/* "${R}"/lib/
                 # Remove temporary directory for kernel sources
                 rm -fr "${temp_dir}"
                 # Set permissions of the kernel sources
                 chown -R root:root "${R}/boot/firmware"
                 chown -R root:root "${R}/lib/modules"
                 #Create cmdline.txt for 15-rpi-config.sh
                 touch "${BOOT_DIR}/cmdline.txt"
               fi
               # Check if kernel installation was successful
               KERNEL="$(ls -1 "${R}"/boot/firmware/kernel* | sort | tail -n 1)"
               if [ -z "$KERNEL" ] ; then
                 echo "error: kernel installation failed! (/boot/kernel* not found)"
                 cleanup
                 exit 1
               fi
             fi

bootstrap.d/15-rpi-config.sh +29 -1

             #
             # Setup RPi2/3 config and cmdline
             #
             # Load utility functions
             . ./functions.sh
             if [ "$BUILD_KERNEL" = true ] ; then
               if [ -n "$RPI_FIRMWARE_DIR" ] && [ -d "$RPI_FIRMWARE_DIR" ] ; then
                 # Install boot binaries from local directory
                 cp "${RPI_FIRMWARE_DIR}"/boot/bootcode.bin "${BOOT_DIR}"/bootcode.bin
                 cp "${RPI_FIRMWARE_DIR}"/boot/fixup.dat "${BOOT_DIR}"/fixup.dat
                 cp "${RPI_FIRMWARE_DIR}"/boot/fixup_cd.dat "${BOOT_DIR}"/fixup_cd.dat
                 cp "${RPI_FIRMWARE_DIR}"/boot/fixup_x.dat "${BOOT_DIR}"/fixup_x.dat
                 cp "${RPI_FIRMWARE_DIR}"/boot/start.elf "${BOOT_DIR}"/start.elf
                 cp "${RPI_FIRMWARE_DIR}"/boot/start_cd.elf "${BOOT_DIR}"/start_cd.elf
                 cp "${RPI_FIRMWARE_DIR}"/boot/start_x.elf "${BOOT_DIR}"/start_x.elf
               else
                 # Create temporary directory for boot binaries
                 temp_dir=$(as_nobody mktemp -d)
                 # Install latest boot binaries from raspberry/firmware github
                 as_nobody wget -q -O "${temp_dir}/bootcode.bin" "${FIRMWARE_URL}/bootcode.bin"
                 as_nobody wget -q -O "${temp_dir}/fixup.dat" "${FIRMWARE_URL}/fixup.dat"
                 as_nobody wget -q -O "${temp_dir}/fixup_cd.dat" "${FIRMWARE_URL}/fixup_cd.dat"
                 as_nobody wget -q -O "${temp_dir}/fixup_x.dat" "${FIRMWARE_URL}/fixup_x.dat"
                 as_nobody wget -q -O "${temp_dir}/start.elf" "${FIRMWARE_URL}/start.elf"
                 as_nobody wget -q -O "${temp_dir}/start_cd.elf" "${FIRMWARE_URL}/start_cd.elf"
                 as_nobody wget -q -O "${temp_dir}/start_x.elf" "${FIRMWARE_URL}/start_x.elf"
                 # Move downloaded boot binaries
                 mv "${temp_dir}/"* "${BOOT_DIR}/"
                 # Remove temporary directory for boot binaries
                 rm -fr "${temp_dir}"
                 # Set permissions of the boot binaries
                 chown -R root:root "${BOOT_DIR}"
                 chmod -R 600 "${BOOT_DIR}"
               fi
             fi
             # Setup firmware boot cmdline
             if [ "$ENABLE_UBOOTUSB" = true ] ; then
               CMDLINE="dwc_otg.lpm_enable=0 root=/dev/sda2 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait console=tty1 init=/bin/systemd"
             else
               if [ "$ENABLE_SPLITFS" = true ] ; then
                 CMDLINE="dwc_otg.lpm_enable=0 root=/dev/sda1 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait console=tty1 init=/bin/systemd"
               else
                 CMDLINE="dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait console=tty1 init=/bin/systemd"
               fi
             fi
             # Add encrypted root partition to cmdline.txt
             if [ "$ENABLE_CRYPTFS" = true ] ; then
               if [ "$ENABLE_SPLITFS" = true ] ; then
                 CMDLINE=$(echo "${CMDLINE}" | sed "s/sda1/mapper\/${CRYPTFS_MAPPING} cryptdevice=\/dev\/sda1:${CRYPTFS_MAPPING}/")
               else
                 if [ "$ENABLE_UBOOTUSB" = true ] ; then
                   CMDLINE=$(echo "${CMDLINE}" | sed "s/sda2/mapper\/${CRYPTFS_MAPPING} cryptdevice=\/dev\/sda2:${CRYPTFS_MAPPING}/")
                 else
                   CMDLINE=$(echo "${CMDLINE}" | sed "s/mmcblk0p2/mapper\/${CRYPTFS_MAPPING} cryptdevice=\/dev\/mmcblk0p2:${CRYPTFS_MAPPING}/")
                 fi
               fi
             fi
+            if [ "$KERNEL_ZSWAP" = true ] ; then
+              # Create temporary directory for systemd-swap sources
+              temp_dir=$(as_nobody mktemp -d)
+              # Fetch systemd-swap sources
+              as_nobody git -C "${temp_dir}" clone "${ZSWAP_URL}"
+              # Copy downloaded systemd-swap sources
+              mv "${temp_dir}/systemd-swap" "${R}/tmp/"
+              # Set permissions of the systemd-swap sources
+              chown -R root:root "${R}/tmp/systemd-swap"
+              # Remove temporary directory for systemd-swap sources
+              rm -fr "${temp_dir}"
+              # Change into downloaded src dir
+              cd "${R}/tmp/systemd-swap" || exit
+              # Build package
+              . ./systemd-swap/package.sh debian
+              # Install package
+              chroot_exec dpkg -i /tmp/systemd-swap/systemd-swap-*any.deb
+              # Change back into script root dir
+              cd "${WORKDIR}" || exit
+            fi
             #locks cpu at max frequency
             if [ "$ENABLE_TURBO" = true ] ; then
               echo "force_turbo=1" >> "${BOOT_DIR}/config.txt"
               # helps to avoid sdcard corruption when force_turbo is enabled.
               echo "boot_delay=1" >> "${BOOT_DIR}/config.txt"
             fi
             if [ "$ENABLE_PRINTK" = true ] ; then
               install_readonly files/sysctl.d/83-rpi-printk.conf "${ETC_DIR}/sysctl.d/83-rpi-printk.conf"
             fi
             # Install udev rule for serial alias
             install_readonly files/etc/99-com.rules "${LIB_DIR}/udev/rules.d/99-com.rules"
             if [ "$RPI_MODEL" = 0 ] || [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; then
               # RPI0,3,3P Use default ttyS0 (mini-UART)as serial interface
               SET_SERIAL="ttyS0"
               # Bluetooth enabled
               if [ "$ENABLE_BLUETOOTH" = true ] ; then
                 # Create temporary directory for Bluetooth sources
                 temp_dir=$(as_nobody mktemp -d)
                 # Fetch Bluetooth sources
                 as_nobody git -C "${temp_dir}" clone "${BLUETOOTH_URL}"
                 # Copy downloaded sources
                 mv "${temp_dir}/pi-bluetooth" "${R}/tmp/"
                 # Bluetooth firmware from arch aur https://aur.archlinux.org/packages/pi-bluetooth/
                 as_nobody wget -q -O "${R}/tmp/pi-bluetooth/LICENCE.broadcom_bcm43xx" https://aur.archlinux.org/cgit/aur.git/plain/LICENCE.broadcom_bcm43xx?h=pi-bluetooth
                 as_nobody wget -q -O "${R}/tmp/pi-bluetooth/BCM43430A1.hcd" https://aur.archlinux.org/cgit/aur.git/plain/BCM43430A1.hcd?h=pi-bluetooth
                 # Set permissions
                 chown -R root:root "${R}/tmp/pi-bluetooth"
                 # Install tools
                 install_readonly "${R}/tmp/pi-bluetooth/usr/bin/btuart" "${R}/usr/bin/btuart"
                 install_readonly "${R}/tmp/pi-bluetooth/usr/bin/bthelper" "${R}/usr/bin/bthelper"
                 # Install bluetooth udev rule
                 install_readonly "${R}/tmp/pi-bluetooth/lib/udev/rules.d/90-pi-bluetooth.rules" "${LIB_DIR}/udev/rules.d/90-pi-bluetooth.rules"
                 # Install Firmware Flash file and apropiate licence
                 mkdir -p "$BLUETOOTH_FIRMWARE_DIR"
                 install_readonly "${R}/tmp/pi-bluetooth/LICENCE.broadcom_bcm43xx" "${BLUETOOTH_FIRMWARE_DIR}/LICENCE.broadcom_bcm43xx"
                 install_readonly "${R}/tmp/pi-bluetooth/BCM43430A1.hcd" "${BLUETOOTH_FIRMWARE_DIR}/LICENCE.broadcom_bcm43xx"
                 install_readonly "${R}/tmp/pi-bluetooth/debian/pi-bluetooth.bthelper@.service" "${ETC_DIR}/systemd/system/pi-bluetooth.bthelper@.service"
                 install_readonly "${R}/tmp/pi-bluetooth/debian/pi-bluetooth.hciuart.service" "${ETC_DIR}/systemd/system/pi-bluetooth.hciuart.service"
                 # Remove temporary directory
                 rm -fr "${temp_dir}"
                 # Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore UART0/ttyAMA0 over GPIOs 14 & 15. Slow Bluetooth and slow cpu. Use /dev/ttyS0 instead of /dev/ttyAMA0
                 if [ "$ENABLE_MINIUART_OVERLAY" = true ] ; then
             	  SET_SERIAL="ttyAMA0"
             	  # set overlay to swap ttyAMA0 and ttyS0
                   echo "dtoverlay=pi3-miniuart-bt" >> "${BOOT_DIR}/config.txt"
             	  # if force_turbo didn't lock cpu at high speed, lock it at low speed (XOR logic) or miniuart will be broken
             	  if [ "$ENABLE_TURBO" = false ] ; then
             	    echo "core_freq=250" >> "${BOOT_DIR}/config.txt"
             	  fi
             	  # Activate services
             	  chroot_exec systemctl enable pi-bluetooth.hciuart.service
             	  #chroot_exec systemctl enable pi-bluetooth.bthelper@.service
             	else
             	  chroot_exec systemctl enable pi-bluetooth.hciuart.service
             	  #chroot_exec systemctl enable pi-bluetooth.bthelper@.service
             	fi
               else # if ENABLE_BLUETOOTH = false
               	# set overlay to disable bluetooth
                 echo "dtoverlay=pi3-disable-bt" >> "${BOOT_DIR}/config.txt"
               fi # ENABLE_BLUETOOTH end
             else
               # RPI1,1P,2 Use default ttyAMA0 (full UART) as serial interface
               SET_SERIAL="ttyAMA0"
             fi
             # may need sudo systemctl disable hciuart
             if [ "$ENABLE_CONSOLE" = true ] ; then
               echo "enable_uart=1"  >> "${BOOT_DIR}/config.txt"
               # add string to cmdline
               CMDLINE="${CMDLINE} console=serial0,115200"
               # Enable serial console systemd style
               chroot_exec systemctl enable serial-getty@"$SET_SERIAL".service
             else
               echo "enable_uart=0"  >> "${BOOT_DIR}/config.txt"
               # disable serial console systemd style
               chroot_exec systemctl disable serial-getty@"$SET_SERIAL".service
             fi
             # Remove IPv6 networking support
             if [ "$ENABLE_IPV6" = false ] ; then
               CMDLINE="${CMDLINE} ipv6.disable=1"
             fi
             # Automatically assign predictable network interface names
             if [ "$ENABLE_IFNAMES" = false ] ; then
               CMDLINE="${CMDLINE} net.ifnames=0"
             else
               CMDLINE="${CMDLINE} net.ifnames=1"
             fi
             # Install firmware boot cmdline
             echo "${CMDLINE}" > "${BOOT_DIR}/cmdline.txt"
             # Install firmware config
             install_readonly files/boot/config.txt "${BOOT_DIR}/config.txt"
             # Setup minimal GPU memory allocation size: 16MB (no X)
             if [ "$ENABLE_MINGPU" = true ] ; then
               echo "gpu_mem=16" >> "${BOOT_DIR}/config.txt"
             fi
             # Setup boot with initramfs
             if [ "$ENABLE_INITRAMFS" = true ] ; then
               echo "initramfs initramfs-${KERNEL_VERSION} followkernel" >> "${BOOT_DIR}/config.txt"
             fi
             # Create firmware configuration and cmdline symlinks
             ln -sf firmware/config.txt "${R}/boot/config.txt"
             ln -sf firmware/cmdline.txt "${R}/boot/cmdline.txt"
             # Install and setup kernel modules to load at boot
             mkdir -p "${LIB_DIR}/modules-load.d/"
             install_readonly files/modules/rpi2.conf "${LIB_DIR}/modules-load.d/rpi2.conf"
             # Load hardware random module at boot
             if [ "$ENABLE_HWRANDOM" = true ] && [ "$BUILD_KERNEL" = false ] ; then
               sed -i "s/^# bcm2708_rng/bcm2708_rng/" "${LIB_DIR}/modules-load.d/rpi2.conf"
             fi
             # Load sound module at boot
             if [ "$ENABLE_SOUND" = true ] ; then
               sed -i "s/^# snd_bcm2835/snd_bcm2835/" "${LIB_DIR}/modules-load.d/rpi2.conf"
             else
               echo "dtparam=audio=off" >> "${BOOT_DIR}/config.txt"
             fi
             # Enable I2C interface
             if [ "$ENABLE_I2C" = true ] ; then
               echo "dtparam=i2c_arm=on" >> "${BOOT_DIR}/config.txt"
               sed -i "s/^# i2c-bcm2708/i2c-bcm2708/" "${LIB_DIR}/modules-load.d/rpi2.conf"
               sed -i "s/^# i2c-dev/i2c-dev/" "${LIB_DIR}/modules-load.d/rpi2.conf"
             fi
             # Enable SPI interface
             if [ "$ENABLE_SPI" = true ] ; then
               echo "dtparam=spi=on" >> "${BOOT_DIR}/config.txt"
               echo "spi-bcm2708" >> "${LIB_DIR}/modules-load.d/rpi2.conf"
               if [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ]; then
                 sed -i "s/spi-bcm2708/spi-bcm2835/" "${LIB_DIR}/modules-load.d/rpi2.conf"
               fi
             fi
             # Disable RPi2/3 under-voltage warnings
             if [ -n "$DISABLE_UNDERVOLT_WARNINGS" ] ; then
               echo "avoid_warnings=${DISABLE_UNDERVOLT_WARNINGS}" >> "${BOOT_DIR}/config.txt"
             fi
             # Install kernel modules blacklist
             mkdir -p "${ETC_DIR}/modprobe.d/"
             install_readonly files/modules/raspi-blacklist.conf "${ETC_DIR}/modprobe.d/raspi-blacklist.conf"
             # Install sysctl.d configuration files
             install_readonly files/sysctl.d/81-rpi-vm.conf "${ETC_DIR}/sysctl.d/81-rpi-vm.conf"

rpi23-gen-image.sh +2 0

             #!/bin/sh
             ########################################################################
             # rpi23-gen-image.sh					       2015-2017
             #
             # Advanced Debian "stretch" and "buster" bootstrap script for RPi2/3
             #
             # This program is free software; you can redistribute it and/or
             # modify it under the terms of the GNU General Public License
             # as published by the Free Software Foundation; either version 2
             # of the License, or (at your option) any later version.
             #
             # Copyright (C) 2015 Jan Wagner <mail@jwagner.eu>
             #
             # Big thanks for patches and enhancements by 20+ github contributors!
             ########################################################################
             # Are we running as root?
             if [ "$(id -u)" -ne "0" ] ; then
               echo "error: this script must be executed with root privileges!"
               exit 1
             fi
             # Check if ./functions.sh script exists
             if [ ! -r "./functions.sh" ] ; then
               echo "error: './functions.sh' required script not found!"
               exit 1
             fi
             # Load utility functions
             . ./functions.sh
             # Load parameters from configuration template file
             if [ -n "$CONFIG_TEMPLATE" ] ; then
               use_template
             fi
             # Introduce settings
             set -e
             echo -n -e "\n#\n# RPi2/3 Bootstrap Settings\n#\n"
             set -x
             # Raspberry Pi model configuration
             RPI_MODEL=${RPI_MODEL:=2}
             # Debian release
             RELEASE=${RELEASE:=buster}
             # Kernel Branch
             KERNEL_BRANCH=${KERNEL_BRANCH:=""}
             # URLs
             KERNEL_URL=${KERNEL_URL:=https://github.com/raspberrypi/linux}
             FIRMWARE_URL=${FIRMWARE_URL:=https://github.com/raspberrypi/firmware/raw/master/boot}
             WLAN_FIRMWARE_URL=${WLAN_FIRMWARE_URL:=https://github.com/RPi-Distro/firmware-nonfree/raw/master/brcm}
             COLLABORA_URL=${COLLABORA_URL:=https://repositories.collabora.co.uk/debian}
             FBTURBO_URL=${FBTURBO_URL:=https://github.com/ssvb/xf86-video-fbturbo.git}
             UBOOT_URL=${UBOOT_URL:=https://git.denx.de/u-boot.git}
             VIDEOCORE_URL=${VIDEOCORE_URL:=https://github.com/raspberrypi/userland}
             #BIS= Kernel has KVM and zswap enabled
             RPI3_64_BIS_KERNEL_URL=${RPI3_64_BIS_KERNEL_URL:=https://github.com/sakaki-/bcmrpi3-kernel-bis/releases/download/4.14.80.20181113/bcmrpi3-kernel-bis-4.14.80.20181113.tar.xz}
             #default bcmrpi3_defconfig target kernel
             RPI3_64_DEF_KERNEL_URL=${RPI3_64_DEF_KERNEL_URL:=https://github.com/sakaki-/bcmrpi3-kernel/releases/download/4.14.80.20181113/bcmrpi3-kernel-4.14.80.20181113.tar.xz}
             #enhanced kernel
             RPI3_64_KERNEL_URL=${RPI3_64_KERNEL_URL:=$RPI3_64_BIS_KERNEL_URL}
             BLUETOOTH_URL=${BLUETOOTH_URL:=https://github.com/RPi-Distro/pi-bluetooth.git}
             NEXMON_URL=${NEXMON_URL:=https://github.com/seemoo-lab/nexmon.git}
+            ZSWAP_URL=${ZSWAP_URL:=https://github.com/Nefelim4ag/systemd-swap.git}
             # Build directories
             WORKDIR=$(pwd)
             BASEDIR=${BASEDIR:=${WORKDIR}/images/${RELEASE}}
             BUILDDIR="${BASEDIR}/build"
             # Chroot directories
             R="${BUILDDIR}/chroot"
             ETC_DIR="${R}/etc"
             LIB_DIR="${R}/lib"
             BOOT_DIR="${R}/boot/firmware"
             KERNEL_DIR="${R}/usr/src/linux"
             WLAN_FIRMWARE_DIR="${LIB_DIR}/firmware/brcm"
             BLUETOOTH_FIRMWARE_DIR="${ETC_DIR}/firmware/bt"
             # Firmware directory: Blank if download from github
             RPI_FIRMWARE_DIR=${RPI_FIRMWARE_DIR:=""}
             # General settings
             SET_ARCH=${SET_ARCH:=32}
             HOSTNAME=${HOSTNAME:=rpi${RPI_MODEL}-${RELEASE}}
             PASSWORD=${PASSWORD:=raspberry}
             USER_PASSWORD=${USER_PASSWORD:=raspberry}
             DEFLOCAL=${DEFLOCAL:="en_US.UTF-8"}
             TIMEZONE=${TIMEZONE:="Europe/Berlin"}
             EXPANDROOT=${EXPANDROOT:=true}
             # Keyboard settings
             XKB_MODEL=${XKB_MODEL:=""}
             XKB_LAYOUT=${XKB_LAYOUT:=""}
             XKB_VARIANT=${XKB_VARIANT:=""}
             XKB_OPTIONS=${XKB_OPTIONS:=""}
             # Network settings (DHCP)
             ENABLE_DHCP=${ENABLE_DHCP:=true}
             # Network settings (static)
             NET_ADDRESS=${NET_ADDRESS:=""}
             NET_GATEWAY=${NET_GATEWAY:=""}
             NET_DNS_1=${NET_DNS_1:=""}
             NET_DNS_2=${NET_DNS_2:=""}
             NET_DNS_DOMAINS=${NET_DNS_DOMAINS:=""}
             NET_NTP_1=${NET_NTP_1:=""}
             NET_NTP_2=${NET_NTP_2:=""}
             # APT settings
             APT_PROXY=${APT_PROXY:=""}
             APT_SERVER=${APT_SERVER:="ftp.debian.org"}
             # Feature settings
             ENABLE_PRINTK=${ENABLE_PRINTK:=false}
             ENABLE_BLUETOOTH=${ENABLE_BLUETOOTH:=false}
             ENABLE_MINIUART_OVERLAY=${ENABLE_MINIUART_OVERLAY:=false}
             ENABLE_CONSOLE=${ENABLE_CONSOLE:=true}
             ENABLE_I2C=${ENABLE_I2C:=false}
             ENABLE_SPI=${ENABLE_SPI:=false}
             ENABLE_IPV6=${ENABLE_IPV6:=true}
             ENABLE_SSHD=${ENABLE_SSHD:=true}
             ENABLE_NONFREE=${ENABLE_NONFREE:=false}
             ENABLE_WIRELESS=${ENABLE_WIRELESS:=false}
             ENABLE_SOUND=${ENABLE_SOUND:=true}
             ENABLE_DBUS=${ENABLE_DBUS:=true}
             ENABLE_HWRANDOM=${ENABLE_HWRANDOM:=true}
             ENABLE_MINGPU=${ENABLE_MINGPU:=false}
             ENABLE_XORG=${ENABLE_XORG:=false}
             ENABLE_WM=${ENABLE_WM:=""}
             ENABLE_RSYSLOG=${ENABLE_RSYSLOG:=true}
             ENABLE_USER=${ENABLE_USER:=true}
             USER_NAME=${USER_NAME:="pi"}
             ENABLE_ROOT=${ENABLE_ROOT:=false}
             ENABLE_QEMU=${ENABLE_QEMU:=false}
             ENABLE_SYSVINIT=${ENABLE_SYSVINIT:=false}
             # SSH settings
             SSH_ENABLE_ROOT=${SSH_ENABLE_ROOT:=false}
             SSH_DISABLE_PASSWORD_AUTH=${SSH_DISABLE_PASSWORD_AUTH:=false}
             SSH_LIMIT_USERS=${SSH_LIMIT_USERS:=false}
             SSH_ROOT_PUB_KEY=${SSH_ROOT_PUB_KEY:=""}
             SSH_USER_PUB_KEY=${SSH_USER_PUB_KEY:=""}
             # Advanced settings
             ENABLE_MINBASE=${ENABLE_MINBASE:=false}
             ENABLE_REDUCE=${ENABLE_REDUCE:=false}
             ENABLE_UBOOT=${ENABLE_UBOOT:=false}
             UBOOTSRC_DIR=${UBOOTSRC_DIR:=""}
             ENABLE_UBOOTUSB=${ENABLE_UBOOTUSB=false}
             ENABLE_FBTURBO=${ENABLE_FBTURBO:=false}
             ENABLE_VIDEOCORE=${ENABLE_VIDEOCORE:=false}
             ENABLE_NEXMON=${ENABLE_NEXMON:="false"}
             VIDEOCORESRC_DIR=${VIDEOCORESRC_DIR:=""}
             FBTURBOSRC_DIR=${FBTURBOSRC_DIR:=""}
             NEXMON_DIR=${NEXMON_DIR:=""}
             ENABLE_HARDNET=${ENABLE_HARDNET:=false}
             ENABLE_IPTABLES=${ENABLE_IPTABLES:=false}
             ENABLE_SPLITFS=${ENABLE_SPLITFS:=false}
             ENABLE_INITRAMFS=${ENABLE_INITRAMFS:=false}
             ENABLE_IFNAMES=${ENABLE_IFNAMES:=true}
             DISABLE_UNDERVOLT_WARNINGS=${DISABLE_UNDERVOLT_WARNINGS:=}
             # Kernel compilation settings
             BUILD_KERNEL=${BUILD_KERNEL:=true}
             KERNEL_REDUCE=${KERNEL_REDUCE:=false}
             KERNEL_THREADS=${KERNEL_THREADS:=1}
             KERNEL_HEADERS=${KERNEL_HEADERS:=true}
             KERNEL_MENUCONFIG=${KERNEL_MENUCONFIG:=false}
             KERNEL_REMOVESRC=${KERNEL_REMOVESRC:=true}
             KERNEL_OLDDEFCONFIG=${KERNEL_OLDDEFCONFIG:=false}
             KERNEL_CCACHE=${KERNEL_CCACHE:=false}
             KERNEL_ZSWAP=${KERNEL_ZSWAP:=false}
             KERNEL_VIRT=${KERNEL_VIRT:=false}
             KERNEL_BPF=${KERNEL_BPF:=false}
             KERNEL_DEFAULT_GOV=${KERNEL_DEFAULT_GOV:=POWERSAVE}
             # Kernel compilation from source directory settings
             KERNELSRC_DIR=${KERNELSRC_DIR:=""}
             KERNELSRC_CLEAN=${KERNELSRC_CLEAN:=false}
             KERNELSRC_CONFIG=${KERNELSRC_CONFIG:=true}
             KERNELSRC_PREBUILT=${KERNELSRC_PREBUILT:=false}
             # Reduce disk usage settings
             REDUCE_APT=${REDUCE_APT:=true}
             REDUCE_DOC=${REDUCE_DOC:=true}
             REDUCE_MAN=${REDUCE_MAN:=true}
             REDUCE_VIM=${REDUCE_VIM:=false}
             REDUCE_BASH=${REDUCE_BASH:=false}
             REDUCE_HWDB=${REDUCE_HWDB:=true}
             REDUCE_SSHD=${REDUCE_SSHD:=true}
             REDUCE_LOCALE=${REDUCE_LOCALE:=true}
             # Encrypted filesystem settings
             ENABLE_CRYPTFS=${ENABLE_CRYPTFS:=false}
             CRYPTFS_PASSWORD=${CRYPTFS_PASSWORD:=""}
             CRYPTFS_MAPPING=${CRYPTFS_MAPPING:="secure"}
             CRYPTFS_CIPHER=${CRYPTFS_CIPHER:="aes-xts-plain64:sha512"}
             CRYPTFS_XTSKEYSIZE=${CRYPTFS_XTSKEYSIZE:=512}
             #Dropbear-initramfs supports unlocking encrypted filesystem via SSH on bootup
             CRYPTFS_DROPBEAR=${CRYPTFS_DROPBEAR:=false}
             #Provide your own Dropbear Public RSA-OpenSSH Key otherwise it will be generated
             CRYPTFS_DROPBEAR_PUBKEY=${CRYPTFS_DROPBEAR_PUBKEY:=""}
             # Chroot scripts directory
             CHROOT_SCRIPTS=${CHROOT_SCRIPTS:=""}
             # Packages required in the chroot build environment
             APT_INCLUDES=${APT_INCLUDES:=""}
             APT_INCLUDES="${APT_INCLUDES},apt-transport-https,apt-utils,ca-certificates,debian-archive-keyring,dialog,sudo,systemd,sysvinit-utils,locales,keyboard-configuration,console-setup,libnss-systemd"
             #Packages to exclude from chroot build environment
             APT_EXCLUDES=${APT_EXCLUDES:=""}
             # Packages required for bootstrapping
             REQUIRED_PACKAGES="debootstrap debian-archive-keyring qemu-user-static binfmt-support dosfstools rsync bmap-tools whois git bc psmisc dbus sudo netselect-apt"
             MISSING_PACKAGES=""
             # Packages installed for c/c++ build environment in chroot (keep empty)
             COMPILER_PACKAGES=""
             set +x
             #Check if apt-cacher-ng has port 3142 open and set APT_PROXY
             APT_CACHER_RUNNING=$(lsof -i :3142 | grep apt-cacher-ng |  cut -d ' ' -f3 | uniq)
             if [ -n "${APT_CACHER_RUNNING}" ] ; then
               APT_PROXY=http://127.0.0.1:3142/
             fi
             #netselect-apt does not know buster yet
             if  [ "$RELEASE" = "buster" ] ; then
               RLS=testing
             else
               RLS="$RELEASE"
             fi
             if [ -f "$(pwd)/files/apt/sources.list" ] ; then
             rm "$(pwd)/files/apt/sources.list"
             fi
             if [ "$ENABLE_NONFREE" = true ] ; then
               netselect-apt --arch "$RELEASE_ARCH" --tests 10 --sources --nonfree  --outfile "$(pwd)/files/apt/sources.list"  -d "$RLS"
             else
               netselect-apt --arch "$RELEASE_ARCH" --tests 10 --sources --outfile "$(pwd)/files/apt/sources.list" -d "$RLS"
             fi
             #sed and cut the result string so we can use it as APT_SERVER
             APT_SERVER=$(grep -m 1 http files/apt/sources.list | sed "s|http://| |g" | cut -d ' ' -f 3 | sed 's|/$|''|')
             #make script easier and more stable to use with convenient setup switch. Just setup SET_ARCH and RPI_MODEL and your good to go!
             if [ -n "$SET_ARCH" ] ; then
               # 64 bit configuration
               if [ "$SET_ARCH" = 64 ] ; then
                 # General 64 bit depended settings
                 QEMU_BINARY=${QEMU_BINARY:=/usr/bin/qemu-aarch64-static}
                 KERNEL_ARCH=${KERNEL_ARCH:=arm64}
                 KERNEL_BIN_IMAGE=${KERNEL_BIN_IMAGE:="Image"}
                 # Board specific settings
                 if [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; then
                   REQUIRED_PACKAGES="${REQUIRED_PACKAGES} crossbuild-essential-arm64"
                   KERNEL_DEFCONFIG=${KERNEL_DEFCONFIG:=bcmrpi3_defconfig}
                   RELEASE_ARCH=${RELEASE_ARCH:=arm64}
                   KERNEL_IMAGE=${KERNEL_IMAGE:=kernel8.img}
                   CROSS_COMPILE=${CROSS_COMPILE:=aarch64-linux-gnu-}
                 else
                   echo "error: Only Raspberry PI 3 and 3B+ support 64 bit"
                   exit 1
                 fi
               fi
               # 32 bit configuration
               if [ "$SET_ARCH" = 32 ] ; then
                 # General 32 bit dependend settings
                 QEMU_BINARY=${QEMU_BINARY:=/usr/bin/qemu-arm-static}
                 KERNEL_ARCH=${KERNEL_ARCH:=arm}
                 KERNEL_BIN_IMAGE=${KERNEL_BIN_IMAGE:="zImage"}
                 # Hardware specific settings
                 if [ "$RPI_MODEL" = 0 ] || [ "$RPI_MODEL" = 1 ] || [ "$RPI_MODEL" = 1P ] ; then
                   REQUIRED_PACKAGES="${REQUIRED_PACKAGES} crossbuild-essential-armel"
                   KERNEL_DEFCONFIG=${KERNEL_DEFCONFIG:=bcmrpi_defconfig}
                   RELEASE_ARCH=${RELEASE_ARCH:=armel}
                   KERNEL_IMAGE=${KERNEL_IMAGE:=kernel.img}
                   CROSS_COMPILE=${CROSS_COMPILE:=arm-linux-gnueabi-}
                 fi
                 # Hardware specific settings
                 if [ "$RPI_MODEL" = 2 ] || [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; then
                   REQUIRED_PACKAGES="${REQUIRED_PACKAGES} crossbuild-essential-armhf"
                   KERNEL_DEFCONFIG=${KERNEL_DEFCONFIG:=bcm2709_defconfig}
                   RELEASE_ARCH=${RELEASE_ARCH:=armhf}
                   KERNEL_IMAGE=${KERNEL_IMAGE:=kernel7.img}
                   CROSS_COMPILE=${CROSS_COMPILE:=arm-linux-gnueabihf-}
                 fi
               fi
             #SET_ARCH not set
             else
               echo "error: Please set '32' or '64' as value for SET_ARCH"
               exit 1
             fi
             # Device specific configuration and U-Boot configuration
             case "$RPI_MODEL" in
 )
                 DTB_FILE=${DTB_FILE:=bcm2708-rpi-0-w.dtb}
                 UBOOT_CONFIG=${UBOOT_CONFIG:=rpi_defconfig}
                 ;;
 )
                 DTB_FILE=${DTB_FILE:=bcm2708-rpi-b.dtb}
                 UBOOT_CONFIG=${UBOOT_CONFIG:=rpi_defconfig}
                 ;;
 P)
                 DTB_FILE=${DTB_FILE:=bcm2708-rpi-b-plus.dtb}
                 UBOOT_CONFIG=${UBOOT_CONFIG:=rpi_defconfig}
                 ;;
 )
                 DTB_FILE=${DTB_FILE:=bcm2709-rpi-2-b.dtb}
                 UBOOT_CONFIG=${UBOOT_CONFIG:=rpi_2_defconfig}
                 ;;
 )
                 DTB_FILE=${DTB_FILE:=bcm2710-rpi-3-b.dtb}
                 UBOOT_CONFIG=${UBOOT_CONFIG:=rpi_3_defconfig}
                 ;;
 P)
                 DTB_FILE=${DTB_FILE:=bcm2710-rpi-3-b.dtb}
                 UBOOT_CONFIG=${UBOOT_CONFIG:=rpi_3_defconfig}
                 ;;
               *)
                 echo "error: Raspberry Pi model $RPI_MODEL is not supported!"
                 exit 1
                 ;;
             esac
             # Raspberry PI 0,3,3P with Bluetooth and Wifi onboard
             if [ "$RPI_MODEL" = 0 ] || [ "$RPI_MODEL" = 3 ] || [ "$RPI_MODEL" = 3P ] ; then
               # Include bluetooth packages on supported boards
               if [ "$ENABLE_BLUETOOTH" = true ] && [ "$ENABLE_CONSOLE" = false ]; then
                 APT_INCLUDES="${APT_INCLUDES},bluetooth,bluez"
               fi
             else # Raspberry PI 1,1P,2 without Wifi and bluetooth onboard
               # Check if the internal wireless interface is not supported by the RPi model
               if [ "$ENABLE_WIRELESS" = true ] || [ "$ENABLE_BLUETOOTH" = true ]; then
                 echo "error: The selected Raspberry Pi model has no integrated interface for wireless or bluetooth"
                 exit 1
               fi
             fi
             # Prepare date string for default image file name
             DATE="$(date +%Y-%m-%d)"
             if [ -z "$KERNEL_BRANCH" ] ; then
               IMAGE_NAME=${IMAGE_NAME:=${BASEDIR}/${DATE}-${KERNEL_ARCH}-CURRENT-rpi${RPI_MODEL}-${RELEASE}-${RELEASE_ARCH}}
             else
               IMAGE_NAME=${IMAGE_NAME:=${BASEDIR}/${DATE}-${KERNEL_ARCH}-${KERNEL_BRANCH}-rpi${RPI_MODEL}-${RELEASE}-${RELEASE_ARCH}}
             fi
             # Check if DISABLE_UNDERVOLT_WARNINGS parameter value is supported
             if [ -n "$DISABLE_UNDERVOLT_WARNINGS" ] ; then
               if [ "$DISABLE_UNDERVOLT_WARNINGS" != 1 ] && [ "$DISABLE_UNDERVOLT_WARNINGS" != 2 ] ; then
                 echo "error: DISABLE_UNDERVOLT_WARNINGS=${DISABLE_UNDERVOLT_WARNINGS} is not supported"
                 exit 1
               fi
             fi
             # Add cmake to compile videocore sources
             if [ "$ENABLE_VIDEOCORE" = true ] ; then
               REQUIRED_PACKAGES="${REQUIRED_PACKAGES} cmake"
             fi
             # Add libncurses5 to enable kernel menuconfig
             if [ "$KERNEL_MENUCONFIG" = true ] ; then
               REQUIRED_PACKAGES="${REQUIRED_PACKAGES} libncurses-dev"
             fi
             # Add ccache compiler cache for (faster) kernel cross (re)compilation
             if [ "$KERNEL_CCACHE" = true ] ; then
               REQUIRED_PACKAGES="${REQUIRED_PACKAGES} ccache"
             fi
             # Add cryptsetup package to enable filesystem encryption
             if [ "$ENABLE_CRYPTFS" = true ]  && [ "$BUILD_KERNEL" = true ] ; then
               REQUIRED_PACKAGES="${REQUIRED_PACKAGES} cryptsetup"
               APT_INCLUDES="${APT_INCLUDES},cryptsetup,busybox,console-setup"
               #If cryptfs,dropbear and initramfs are enabled include dropbear-initramfs package
               if [ "$CRYPTFS_DROPBEAR" = true ] && [ "$ENABLE_INITRAMFS" = true ]; then
                 APT_INCLUDES="${APT_INCLUDES},dropbear-initramfs"
               fi
               if [ -z "$CRYPTFS_PASSWORD" ] ; then
                 echo "error: no password defined (CRYPTFS_PASSWORD)!"
                 exit 1
               fi
               ENABLE_INITRAMFS=true
             fi
             # Add initramfs generation tools
             if [ "$ENABLE_INITRAMFS" = true ] && [ "$BUILD_KERNEL" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},initramfs-tools"
             fi
             # Add device-tree-compiler required for building the U-Boot bootloader
             if [ "$ENABLE_UBOOT" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},device-tree-compiler,bison,flex,bc"
             else
               if [ "$ENABLE_UBOOTUSB" = true ] ; then
                 echo "error: Enabling UBOOTUSB requires u-boot to be enabled"
             	exit 1
               fi
             fi
             # Check if root SSH (v2) public key file exists
             if [ -n "$SSH_ROOT_PUB_KEY" ] ; then
               if [ ! -f "$SSH_ROOT_PUB_KEY" ] ; then
                 echo "error: '$SSH_ROOT_PUB_KEY' specified SSH public key file not found (SSH_ROOT_PUB_KEY)!"
                 exit 1
               fi
             fi
             # Check if $USER_NAME SSH (v2) public key file exists
             if [ -n "$SSH_USER_PUB_KEY" ] ; then
               if [ ! -f "$SSH_USER_PUB_KEY" ] ; then
                 echo "error: '$SSH_USER_PUB_KEY' specified SSH public key file not found (SSH_USER_PUB_KEY)!"
                 exit 1
               fi
             fi
             # Check if all required packages are installed on the build system
             for package in $REQUIRED_PACKAGES ; do
               if [ "$(dpkg-query -W -f='${Status}' "$package")" != "install ok installed" ] ; then
                 MISSING_PACKAGES="${MISSING_PACKAGES} $package"
               fi
             done
             # If there are missing packages ask confirmation for install, or exit
             if [ -n "$MISSING_PACKAGES" ] ; then
               echo "the following packages needed by this script are not installed:"
               echo "$MISSING_PACKAGES"
               printf "\ndo you want to install the missing packages right now? [y/n] "
               read -r confirm
               [ "$confirm" != "y" ] && exit 1
               # Make sure all missing required packages are installed
               apt-get -qq -y install "${MISSING_PACKAGES}"
             fi
             # Check if ./bootstrap.d directory exists
             if [ ! -d "./bootstrap.d/" ] ; then
               echo "error: './bootstrap.d' required directory not found!"
               exit 1
             fi
             # Check if ./files directory exists
             if [ ! -d "./files/" ] ; then
               echo "error: './files' required directory not found!"
               exit 1
             fi
             # Check if specified KERNELSRC_DIR directory exists
             if [ -n "$KERNELSRC_DIR" ] && [ ! -d "$KERNELSRC_DIR" ] ; then
               echo "error: '${KERNELSRC_DIR}' specified directory not found (KERNELSRC_DIR)!"
               exit 1
             fi
             # Check if specified UBOOTSRC_DIR directory exists
             if [ -n "$UBOOTSRC_DIR" ] && [ ! -d "$UBOOTSRC_DIR" ] ; then
               echo "error: '${UBOOTSRC_DIR}' specified directory not found (UBOOTSRC_DIR)!"
               exit 1
             fi
             # Check if specified VIDEOCORESRC_DIR directory exists
             if [ -n "$VIDEOCORESRC_DIR" ] && [ ! -d "$VIDEOCORESRC_DIR" ] ; then
               echo "error: '${VIDEOCORESRC_DIR}' specified directory not found (VIDEOCORESRC_DIR)!"
               exit 1
             fi
             # Check if specified FBTURBOSRC_DIR directory exists
             if [ -n "$FBTURBOSRC_DIR" ] && [ ! -d "$FBTURBOSRC_DIR" ] ; then
               echo "error: '${FBTURBOSRC_DIR}' specified directory not found (FBTURBOSRC_DIR)!"
               exit 1
             fi
             # Check if specified NEXMON_DIR directory exists
             if [ -n "$NEXMON_DIR" ] && [ ! -d "$NEXMON_DIR" ] ; then
               echo "error: '${NEXMON_DIR}' specified directory not found (NEXMON_DIR)!"
               exit 1
             fi
             # Check if specified CHROOT_SCRIPTS directory exists
             if [ -n "$CHROOT_SCRIPTS" ] && [ ! -d "$CHROOT_SCRIPTS" ] ; then
                echo "error: ${CHROOT_SCRIPTS} specified directory not found (CHROOT_SCRIPTS)!"
                exit 1
             fi
             # Check if specified device mapping already exists (will be used by cryptsetup)
             if [ -r "/dev/mapping/${CRYPTFS_MAPPING}" ] ; then
               echo "error: mapping /dev/mapping/${CRYPTFS_MAPPING} already exists, not proceeding"
               exit 1
             fi
             # Don't clobber an old build
             if [ -e "$BUILDDIR" ] ; then
               echo "error: directory ${BUILDDIR} already exists, not proceeding"
               exit 1
             fi
             # Setup chroot directory
             mkdir -p "${R}"
             # Check if build directory has enough of free disk space >512MB
             if [ "$(df --output=avail "${BUILDDIR}" | sed "1d")" -le "524288" ] ; then
               echo "error: ${BUILDDIR} not enough space left to generate the output image!"
               exit 1
             fi
             set -x
             # Call "cleanup" function on various signals and errors
             trap cleanup 0 1 2 3 6
             # Add required packages for the minbase installation
             if [ "$ENABLE_MINBASE" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},vim-tiny,netbase,net-tools,ifupdown"
             fi
             # Add parted package, required to get partprobe utility
             if [ "$EXPANDROOT" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},parted"
             fi
             # Add dbus package, recommended if using systemd
             if [ "$ENABLE_DBUS" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},dbus"
             fi
             # Add iptables IPv4/IPv6 package
             if [ "$ENABLE_IPTABLES" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},iptables,iptables-persistent"
             fi
             # Add openssh server package
             if [ "$ENABLE_SSHD" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},openssh-server"
             fi
             # Add alsa-utils package
             if [ "$ENABLE_SOUND" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},alsa-utils"
             fi
             # Add rng-tools package
             if [ "$ENABLE_HWRANDOM" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},rng-tools"
             fi
             # Add fbturbo video driver
             if [ "$ENABLE_FBTURBO" = true ] ; then
               # Enable xorg package dependencies
               ENABLE_XORG=true
             fi
             # Add user defined window manager package
             if [ -n "$ENABLE_WM" ] ; then
               APT_INCLUDES="${APT_INCLUDES},${ENABLE_WM}"
               # Enable xorg package dependencies
               ENABLE_XORG=true
             fi
             # Add xorg package
             if [ "$ENABLE_XORG" = true ] ; then
               APT_INCLUDES="${APT_INCLUDES},xorg,dbus-x11"
             fi
             # Replace selected packages with smaller clones
             if [ "$ENABLE_REDUCE" = true ] ; then
               # Add levee package instead of vim-tiny
               if [ "$REDUCE_VIM" = true ] ; then
                 APT_INCLUDES="$(echo ${APT_INCLUDES} | sed "s/vim-tiny/levee/")"
               fi
               # Add dropbear package instead of openssh-server
               if [ "$REDUCE_SSHD" = true ] ; then
                 APT_INCLUDES="$(echo "${APT_INCLUDES}" | sed "s/openssh-server/dropbear/")"
               fi
             fi
             # Configure systemd-sysv exclude to make halt/reboot/shutdown scripts available
             if [ "$ENABLE_SYSVINIT" = false ] ; then
               APT_EXCLUDES="--exclude=${APT_EXCLUDES},init,systemd-sysv"
             fi
             # Configure kernel sources if no KERNELSRC_DIR
             if [ "$BUILD_KERNEL" = true ] && [ -z "$KERNELSRC_DIR" ] ; then
               KERNELSRC_CONFIG=true
             fi
             # Configure reduced kernel
             if [ "$KERNEL_REDUCE" = true ] ; then
               KERNELSRC_CONFIG=false
             fi
             # Configure qemu compatible kernel
             if [ "$ENABLE_QEMU" = true ] ; then
               DTB_FILE=vexpress-v2p-ca15_a7.dtb
               UBOOT_CONFIG=vexpress_ca15_tc2_defconfig
               KERNEL_DEFCONFIG="vexpress_defconfig"
               if [ "$KERNEL_MENUCONFIG" = false ] ; then
                 KERNEL_OLDDEFCONFIG=true
               fi
             fi
             # Execute bootstrap scripts
             for SCRIPT in bootstrap.d/*.sh; do
               head -n 3 "$SCRIPT"
               . "$SCRIPT"
             done
             ## Execute custom bootstrap scripts
             if [ -d "custom.d" ] ; then
               for SCRIPT in custom.d/*.sh; do
                 . "$SCRIPT"
               done
             fi
             # Execute custom scripts inside the chroot
             if [ -n "$CHROOT_SCRIPTS" ] && [ -d "$CHROOT_SCRIPTS" ] ; then
               cp -r "${CHROOT_SCRIPTS}" "${R}/chroot_scripts"
               chroot_exec /bin/bash -x <<'EOF'
             for SCRIPT in /chroot_scripts/* ; do
               if [ -f $SCRIPT -a -x $SCRIPT ] ; then
                 $SCRIPT
               fi
             done
             EOF
               rm -rf "${R}/chroot_scripts"
             fi
             # Remove c/c++ build environment from the chroot
             chroot_remove_cc
             # Generate required machine-id
             MACHINE_ID=$(dbus-uuidgen)
             echo -n "${MACHINE_ID}" > "${R}/var/lib/dbus/machine-id"
             echo -n "${MACHINE_ID}" > "${ETC_DIR}/machine-id"
             # APT Cleanup
             chroot_exec apt-get -y clean
             chroot_exec apt-get -y autoclean
             chroot_exec apt-get -y autoremove
             # Unmount mounted filesystems
             umount -l "${R}/proc"
             umount -l "${R}/sys"
             # Clean up directories
             rm -rf "${R}/run/*"
             rm -rf "${R}/tmp/*"
             # Clean up files
             rm -f "${ETC_DIR}/ssh/ssh_host_*"
             rm -f "${ETC_DIR}/dropbear/dropbear_*"
             rm -f "${ETC_DIR}/apt/sources.list.save"
             rm -f "${ETC_DIR}/resolvconf/resolv.conf.d/original"
             rm -f "${ETC_DIR}/*-"
             rm -f "${ETC_DIR}/apt/apt.conf.d/10proxy"
             rm -f "${ETC_DIR}/resolv.conf"
             rm -f "${R}/root/.bash_history"
             rm -f "${R}/var/lib/urandom/random-seed"
             rm -f "${R}/initrd.img"
             rm -f "${R}/vmlinuz"
             rm -f "${R}${QEMU_BINARY}"
             if [ "$ENABLE_QEMU" = true ] ; then
               # Setup QEMU directory
               mkdir "${BASEDIR}/qemu"
               # Copy kernel image to QEMU directory
               install_readonly "${BOOT_DIR}/${KERNEL_IMAGE}" "${BASEDIR}/qemu/${KERNEL_IMAGE}"
               # Copy kernel config to QEMU directory
               install_readonly "${R}/boot/config-${KERNEL_VERSION}" "${BASEDIR}/qemu/config-${KERNEL_VERSION}"
               # Copy kernel dtbs to QEMU directory
               for dtb in "${BOOT_DIR}/"*.dtb ; do
                 if [ -f "${dtb}" ] ; then
                   install_readonly "${dtb}" "${BASEDIR}/qemu/"
                 fi
               done
               # Copy kernel overlays to QEMU directory
               if [ -d "${BOOT_DIR}/overlays" ] ; then
                 # Setup overlays dtbs directory
                 mkdir "${BASEDIR}/qemu/overlays"
                 for dtb in "${BOOT_DIR}/overlays/"*.dtb ; do
                   if [ -f "${dtb}" ] ; then
                     install_readonly "${dtb}" "${BASEDIR}/qemu/overlays/"
                   fi
                 done
               fi
               # Copy u-boot files to QEMU directory
               if [ "$ENABLE_UBOOT" = true ] ; then
                 if [ -f "${BOOT_DIR}/u-boot.bin" ] ; then
                   install_readonly "${BOOT_DIR}/u-boot.bin" "${BASEDIR}/qemu/u-boot.bin"
                 fi
                 if [ -f "${BOOT_DIR}/uboot.mkimage" ] ; then
                   install_readonly "${BOOT_DIR}/uboot.mkimage" "${BASEDIR}/qemu/uboot.mkimage"
                 fi
                 if [ -f "${BOOT_DIR}/boot.scr" ] ; then
                   install_readonly "${BOOT_DIR}/boot.scr" "${BASEDIR}/qemu/boot.scr"
                 fi
               fi
               # Copy initramfs to QEMU directory
               if [ -f "${BOOT_DIR}/initramfs-${KERNEL_VERSION}" ] ; then
                 install_readonly "${BOOT_DIR}/initramfs-${KERNEL_VERSION}" "${BASEDIR}/qemu/initramfs-${KERNEL_VERSION}"
               fi
             fi
             # Calculate size of the chroot directory in KB
             CHROOT_SIZE=$(expr "$(du -s "${R}" | awk '{ print $1 }')")
             # Calculate the amount of needed 512 Byte sectors
             TABLE_SECTORS=$(expr 1 \* 1024 \* 1024 \/ 512)
             FRMW_SECTORS=$(expr 64 \* 1024 \* 1024 \/ 512)
             ROOT_OFFSET=$(expr "${TABLE_SECTORS}" + "${FRMW_SECTORS}")
             # The root partition is EXT4
             # This means more space than the actual used space of the chroot is used.
             # As overhead for journaling and reserved blocks 35% are added.
             ROOT_SECTORS=$(expr "$(expr "${CHROOT_SIZE}" + "${CHROOT_SIZE}" \/ 100 \* 35)" \* 1024 \/ 512)
             # Calculate required image size in 512 Byte sectors
             IMAGE_SECTORS=$(expr "${TABLE_SECTORS}" + "${FRMW_SECTORS}" + "${ROOT_SECTORS}")
             # Prepare image file
             if [ "$ENABLE_SPLITFS" = true ] ; then
               dd if=/dev/zero of="$IMAGE_NAME-frmw.img" bs=512 count="${TABLE_SECTORS}"
               dd if=/dev/zero of="$IMAGE_NAME-frmw.img" bs=512 count=0 seek="${FRMW_SECTORS}"
               dd if=/dev/zero of="$IMAGE_NAME-root.img" bs=512 count="${TABLE_SECTORS}"
               dd if=/dev/zero of="$IMAGE_NAME-root.img" bs=512 count=0 seek="${ROOT_SECTORS}"
               # Write firmware/boot partition tables
               sfdisk -q -L -uS -f "$IMAGE_NAME-frmw.img" 2> /dev/null <<EOM
             ${TABLE_SECTORS},${FRMW_SECTORS},c,*
             EOM
               # Write root partition table
               sfdisk -q -L -uS -f "$IMAGE_NAME-root.img" 2> /dev/null <<EOM
             ${TABLE_SECTORS},${ROOT_SECTORS},83
             EOM
               # Setup temporary loop devices
               FRMW_LOOP="$(losetup -o 1M --sizelimit 64M -f --show "$IMAGE_NAME"-frmw.img)"
               ROOT_LOOP="$(losetup -o 1M -f --show "$IMAGE_NAME"-root.img)"
             else # ENABLE_SPLITFS=false
               dd if=/dev/zero of="$IMAGE_NAME.img" bs=512 count="${TABLE_SECTORS}"
               dd if=/dev/zero of="$IMAGE_NAME.img" bs=512 count=0 seek="${IMAGE_SECTORS}"
               # Write partition table
               sfdisk -q -L -uS -f "$IMAGE_NAME.img" 2> /dev/null <<EOM
             ${TABLE_SECTORS},${FRMW_SECTORS},c,*
             ${ROOT_OFFSET},${ROOT_SECTORS},83
             EOM
               # Setup temporary loop devices
               FRMW_LOOP="$(losetup -o 1M --sizelimit 64M -f --show "$IMAGE_NAME".img)"
               ROOT_LOOP="$(losetup -o 65M -f --show "$IMAGE_NAME".img)"
             fi
             if [ "$ENABLE_CRYPTFS" = true ] ; then
               # Create dummy ext4 fs
               mkfs.ext4 "$ROOT_LOOP"
               # Setup password keyfile
               touch .password
               chmod 600 .password
               echo -n ${CRYPTFS_PASSWORD} > .password
               # Initialize encrypted partition
               echo "YES" | cryptsetup luksFormat "${ROOT_LOOP}" -c "${CRYPTFS_CIPHER}" -s "${CRYPTFS_XTSKEYSIZE}" .password
               # Open encrypted partition and setup mapping
               cryptsetup luksOpen "${ROOT_LOOP}" -d .password "${CRYPTFS_MAPPING}"
               # Secure delete password keyfile
               shred -zu .password
               # Update temporary loop device
               ROOT_LOOP="/dev/mapper/${CRYPTFS_MAPPING}"
               # Wipe encrypted partition (encryption cipher is used for randomness)
               dd if=/dev/zero of="${ROOT_LOOP}" bs=512 count="$(blockdev --getsz "${ROOT_LOOP}")"
             fi
             # Build filesystems
             mkfs.vfat "$FRMW_LOOP"
             mkfs.ext4 "$ROOT_LOOP"
             # Mount the temporary loop devices
             mkdir -p "$BUILDDIR/mount"
             mount "$ROOT_LOOP" "$BUILDDIR/mount"
             mkdir -p "$BUILDDIR/mount/boot/firmware"
             mount "$FRMW_LOOP" "$BUILDDIR/mount/boot/firmware"
             # Copy all files from the chroot to the loop device mount point directory
             rsync -a "${R}/" "$BUILDDIR/mount/"
             # Unmount all temporary loop devices and mount points
             cleanup
             # Create block map file(s) of image(s)
             if [ "$ENABLE_SPLITFS" = true ] ; then
               # Create block map files for "bmaptool"
               bmaptool create -o "$IMAGE_NAME-frmw.bmap" "$IMAGE_NAME-frmw.img"
               bmaptool create -o "$IMAGE_NAME-root.bmap" "$IMAGE_NAME-root.img"
               # Image was successfully created
               echo "$IMAGE_NAME-frmw.img ($(expr \( "${TABLE_SECTORS}" + "${FRMW_SECTORS}" \) \* 512 \/ 1024 \/ 1024)M)" ": successfully created"
               echo "$IMAGE_NAME-root.img ($(expr \( "${TABLE_SECTORS}" + "${ROOT_SECTORS}" \) \* 512 \/ 1024 \/ 1024)M)" ": successfully created"
             else
               # Create block map file for "bmaptool"
               bmaptool create -o "$IMAGE_NAME.bmap" "$IMAGE_NAME.img"
               # Image was successfully created
               echo "$IMAGE_NAME.img ($(expr \( "${TABLE_SECTORS}" + "${FRMW_SECTORS}" + "${ROOT_SECTORS}" \) \* 512 \/ 1024 \/ 1024)M)" ": successfully created"
               # Create qemu qcow2 image
               if [ "$ENABLE_QEMU" = true ] ; then
                 QEMU_IMAGE=${QEMU_IMAGE:=${BASEDIR}/qemu/${DATE}-${KERNEL_ARCH}-CURRENT-rpi${RPI_MODEL}-${RELEASE}-${RELEASE_ARCH}}
                 QEMU_SIZE=16G
                 qemu-img convert -f raw -O qcow2 "$IMAGE_NAME".img "$QEMU_IMAGE".qcow2
                 qemu-img resize "$QEMU_IMAGE".qcow2 $QEMU_SIZE
                 echo "$QEMU_IMAGE.qcow2 ($QEMU_SIZE)" ": successfully created"
               fi
             fi

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