Adde Open JDK and ZLIB as overlay bundles. Updated the core components to the latest available versions.

README.md

@@ -20,18 +20,19 @@ This is a screenshot of the current development version of Minimal Linux Live:
 
 ![Minimal Linux Live](http://minimal.idzona.com/assets/img/minimal_linux_live.png)
 
-## Current development state (29-Jan-2017)
+## Current development state (23-Sep-2017)
 
-* Linux kernel 4.4.44 (longterm)
+* Linux kernel 4.13.3 (stable)
-* GNU C Library 2.24 (stable)
+* GNU C Library 2.26 (stable)
-* BusyBox 1.26.2 (stable)
+* BusyBox 1.27.2 (stable)
-* Stable on default Ubuntu 16.04.1 installation (32-bit and 64-bit) with applied system updates.
+* Stable on default Ubuntu 16.04 installation with applied system updates.
 
 ## Future improvements
 
 * Add kernel modules and firmware.
 * Reorganize and simplify the ISO image generation script.
 * Allow individual overlay bundles to be downloaded and installed.
+* Add more overlay bundles.
 
 The above list is not fixed it may be updated at any time.
 

src/.config

@@ -11,7 +11,7 @@
 #
 #   http://kernel.org
 #
-KERNEL_SOURCE_URL=http://kernel.org/pub/linux/kernel/v4.x/linux-4.12.4.tar.xz
+KERNEL_SOURCE_URL=http://kernel.org/pub/linux/kernel/v4.x/linux-4.13.3.tar.xz
 
 # You can find the latest GNU libc source bundles here:
 #
@@ -23,7 +23,7 @@ GLIBC_SOURCE_URL=http://ftp.gnu.org/gnu/glibc/glibc-2.26.tar.bz2
 #
 #   http://busybox.net
 #
-BUSYBOX_SOURCE_URL=http://busybox.net/downloads/busybox-1.27.1.tar.bz2
+BUSYBOX_SOURCE_URL=http://busybox.net/downloads/busybox-1.27.2.tar.bz2
 
 # You can find the latest Syslinux source bundles here:
 #
@@ -57,7 +57,7 @@ DROPBEAR_SOURCE_URL=http://matt.ucc.asn.au/dropbear/releases/dropbear-2017.75.ta
 #
 #   http://felix.apache.org
 #
-FELIX_SOURCE_URL=http://archive.apache.org/dist/felix/org.apache.felix.main.distribution-5.6.4.tar.gz
+FELIX_SOURCE_URL=http://archive.apache.org/dist/felix/org.apache.felix.main.distribution-5.6.8.tar.gz
 
 # You need to manually download Oracle's JRE or JDK and set the property with
 # the absolute path to the downloaded archive. Example:
@@ -65,7 +65,7 @@ FELIX_SOURCE_URL=http://archive.apache.org/dist/felix/org.apache.felix.main.dist
 #   JAVA_ARCHIVE=/home/ivan/Downloads/jdk-8u131-linux-x64.tar.gz
 #
 #JAVA_ARCHIVE=/absolute/path/to/java.archive.tar.gz
-#JAVA_ARCHIVE=/home/ivan/Downloads/jdk-8u131-linux-x64.tar.gz
+#JAVA_ARCHIVE=/home/ivan/Downloads/jdk-9_linux-x64_bin.tar.gz
 
 # You can find the latest Lua source bundes here:
 #
@@ -86,6 +86,20 @@ STATIC_GET_SOURCE_URL=http://s.minos.io/s
 #
 CLOUD_FOUNDRY_CLI_URL=http://cli.run.pivotal.io/stable?release=linux64-binary&source=github
 
+# You can find the latest Open JDK archives here:
+#
+#   http://jdk.java.net/9
+#
+OPENJDK_URL=http://download.java.net/java/GA/jdk9/9/binaries/jdk-9+181_linux-x64_bin.tar.gz
+
+# You can find the latest ZLIB source bundles here:
+#
+#   http://zlib.net
+#
+ZLIB_SOURCE_URL=http://zlib.net/zlib-1.2.11.tar.xz
+
+
+
 ####################################################
 #                                                  #
 #  This section contains configuration properties  #
@@ -162,9 +176,10 @@ COPY_SOURCE_ISO=true
 # Currently available overlay software:
 #
 # glibc_full - all core GNU C libraries (useful if other software is included).
-# links      - text browser.
+# links      - text browser for the web.
 # dropbear   - SSH server and client.
 # java       - installs Oracle's JRE or JDK. Manual preparations are required.
+# openjdk    - installs Open JDK. All operations are automated.
 # felix      - Apache Felix OSGi framework.
 # mll_utils  - set of executable utilities (mll-*).
 # lua        - scripting language
@@ -172,11 +187,12 @@ COPY_SOURCE_ISO=true
 # cf_cli     - CLoud Foundry CLI (command line interface)
 # nweb       - simple mini http server
 # dhcp       - DHCP and DNS functionality
+# zlib       - DEFLATE compression/decompression library.
 #
 # Refer to the README file for more information.
 #
 #OVERLAY_BUNDLES=glibc_full,links,dropbear,java,felix,mll_utils,lua,static_get,cf_cli,nweb,dhcp
-OVERLAY_BUNDLES=nweb,dhcp
+OVERLAY_BUNDLES=dhcp,glibc_full,zlib,openjdk,felix,links
 
 # This property enables the standard penguin boot logo in the upper left corner
 # of the screen. The property is used in 'xx_build_kernel.sh'. The default value

src/02_build_kernel.sh

@@ -49,11 +49,14 @@ else
   # Changes the name of the system to 'minimal'.
   sed -i "s/.*CONFIG_DEFAULT_HOSTNAME.*/CONFIG_DEFAULT_HOSTNAME=\"minimal\"/" .config
 
-  # Enable overlay support, e.g. merge ro and rw directories.
+  # Enable overlay support, e.g. merge ro and rw directories (3.18+).
   sed -i "s/.*CONFIG_OVERLAY_FS.*/CONFIG_OVERLAY_FS=y/" .config
   
-  # Enable overlayfs redirection 
+  # Enable overlayfs redirection (4.10+).
   echo "CONFIG_OVERLAY_FS_REDIRECT_DIR=y" >> .config
+
+  # Turn on inodes index feature by default (4.13+).
+  echo "CONFIG_OVERLAY_FS_INDEX=y" >> .config
   
   # Step 1 - disable all active kernel compression options (should be only one).
   sed -i "s/.*\\(CONFIG_KERNEL_.*\\)=y/\\#\\ \\1 is not set/" .config  

src/README

@@ -27,6 +27,11 @@ Currently available overlay bundles:
 
                This overlay bundle depends on the GLIBC build process.
 
+* ZLIB       - Software library used for data compression.
+
+               This overlay bundle is self sufficient and doesn't require other
+               overlay bundles.
+
 * Links      - text based browser. Requires ~1MB additional space. Use the
                "links" command to activate the browser.
 
@@ -49,6 +54,10 @@ Currently available overlay bundles:
 
                This overlay bundle requires GLIBC.
 
+* Open JDK   - The open source JDK. No need for manual steps.
+
+               This overlay bundle requires GLIBC and ZLIB.
+
 * Felix OSGi - Apache Felix OSGi framework. Requires ~2MB additional space. Use
                the "felix-start" command to run the Apache Felix OSGi framework.
 

src/minimal_overlay/bundles/openjdk/01_get.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+. ../../common.sh
+
+# Grab everything after the '=' character.
+DOWNLOAD_URL=$(grep -i OPENJDK_URL $MAIN_SRC_DIR/.config | cut -f2 -d'=')
+
+# Grab everything after the last '/' character.
+ARCHIVE_FILE=${DOWNLOAD_URL##*/}
+
+# Read the 'USE_LOCAL_SOURCE' property from '.config'
+USE_LOCAL_SOURCE="$(grep -i USE_LOCAL_SOURCE $MAIN_SRC_DIR/.config | cut -f2 -d'=')"
+
+if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE ] ; then
+  echo "Bundle $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE is missing and will be downloaded."
+  USE_LOCAL_SOURCE="false"
+fi
+
+cd $MAIN_SRC_DIR/source/overlay
+
+if [ ! "$USE_LOCAL_SOURCE" = "true" ] ; then
+  # Downloading Open JDK bundle file. The '-c' option allows the download to resume.
+  echo "Downloading Open JDK bundle from $DOWNLOAD_URL"
+  wget -c $DOWNLOAD_URL
+else
+  echo "Using local Open JDK bundle $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE"
+fi
+
+# Delete folder with previously extracted Felix.
+echo "Removing Open JDK work area. This may take a while..."
+rm -rf $WORK_DIR/overlay/openjdk
+mkdir $WORK_DIR/overlay/openjdk
+
+# Extract Open JDK to folder 'work/overlay/openjdk'.
+# Full path will be something like 'work/overlay/openjdk/jdk-9'.
+tar -xvf $ARCHIVE_FILE -C $WORK_DIR/overlay/openjdk
+
+cd $SRC_DIR
+

src/minimal_overlay/bundles/openjdk/02_install.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+. ../../common.sh
+
+cd $WORK_DIR/overlay/openjdk
+mv `ls -d *` openjdk
+
+mkdir opt
+mv openjdk opt
+
+mkdir $WORK_DIR/overlay/openjdk/bin
+cd $WORK_DIR/overlay/openjdk/bin
+
+for FILE in $(ls ../opt/openjdk/bin)
+do
+  ln -s ../opt/openjdk/bin/$FILE $FILE
+done
+
+cp -r $WORK_DIR/overlay/openjdk/* \
+  $WORK_DIR/src/minimal_overlay/rootfs
+
+echo "Open JDK has been installed."
+
+cd $SRC_DIR
+

src/minimal_overlay/bundles/openjdk/bundle.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+time sh 01_get.sh
+time sh 02_install.sh
+
+cd $SRC_DIR
+

src/minimal_overlay/bundles/zlib/01_get.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+. ../../common.sh
+
+# Grab everything after the '=' character.
+DOWNLOAD_URL=$(grep -i ZLIB_SOURCE_URL $MAIN_SRC_DIR/.config | cut -f2 -d'=')
+
+# Grab everything after the last '/' character.
+ARCHIVE_FILE=${DOWNLOAD_URL##*/}
+
+# Read the 'USE_LOCAL_SOURCE' property from '.config'
+USE_LOCAL_SOURCE="$(grep -i USE_LOCAL_SOURCE $MAIN_SRC_DIR/.config | cut -f2 -d'=')"
+
+if [ "$USE_LOCAL_SOURCE" = "true" -a ! -f $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE  ] ; then
+  echo "Source bundle $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE is missing and will be downloaded."
+  USE_LOCAL_SOURCE="false"
+fi
+
+cd $MAIN_SRC_DIR/source/overlay
+
+if [ ! "$USE_LOCAL_SOURCE" = "true" ] ; then
+  # Downloading ZLIB source bundle file. The '-c' option allows the download to resume.
+  echo "Downloading ZLIB source bundle from $DOWNLOAD_URL"
+  wget -c $DOWNLOAD_URL
+else
+  echo "Using local ZLIB source bundle $MAIN_SRC_DIR/source/overlay/$ARCHIVE_FILE"
+fi
+
+# Delete folder with previously extracted ZLIB.
+echo "Removing ZLIB work area. This may take a while..."
+rm -rf $WORK_DIR/overlay/zlib
+mkdir $WORK_DIR/overlay/zlib
+
+# Extract ZLIB to folder 'work/overlay/zlib'.
+# Full path will be something like 'work/overlay/zlib/zlib-1.2.11'.
+tar -xvf $ARCHIVE_FILE -C $WORK_DIR/overlay/zlib
+
+cd $SRC_DIR
+

src/minimal_overlay/bundles/zlib/02_build.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+. ../../common.sh
+
+cd $WORK_DIR/overlay/zlib
+
+DESTDIR="$WORK_DIR/overlay/zlib/zlib_installed"
+
+# Change to the Links source directory which ls finds, e.g. 'zlib-1.2.11'.
+cd $(ls -d zlib-*)
+
+echo "Preparing ZLIB work area. This may take a while..."
+make -j $NUM_JOBS clean
+
+rm -rf $DESTDIR
+
+echo "Configuring ZLIB..."
+CFLAGS="$CFLAGS" ./configure \
+  --prefix=$DESTDIR
+
+echo "Building ZLIB..."
+make -j $NUM_JOBS
+
+echo "Installing ZLIB..."
+make -j $NUM_JOBS install
+
+echo "Reducing ZLIB size..."
+strip -g $DESTDIR/lib/*
+
+ROOTFS="$WORK_DIR/src/minimal_overlay/rootfs"
+
+mkdir -p "$ROOTFS/lib"
+cp -r $DESTDIR/lib/libz.so.1.* $ROOTFS/lib/libz.so.1
+
+echo "ZLIB has been installed."
+
+cd $SRC_DIR
+

src/minimal_overlay/bundles/zlib/bundle.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+SRC_DIR=$(pwd)
+
+time sh 01_get.sh
+time sh 02_build.sh
+
+cd $SRC_DIR
+