diff --git a/meta/recipes-devtools/installer/adt-installer/scripts/adt_installer_internal b/meta/recipes-devtools/installer/adt-installer/scripts/adt_installer_internal
new file mode 100755
index 0000000..6f5fb49
--- /dev/null
+++ b/meta/recipes-devtools/installer/adt-installer/scripts/adt_installer_internal
@@ -0,0 +1,312 @@
+#!/bin/bash
+
+# Yocto ADT Installer
+#
+# Copyright 2010-2011 by Intel Corp.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy 
+# of this software and associated documentation files (the "Software"), to deal 
+# in the Software without restriction, including without limitation the rights 
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+# copies of the Software, and to permit persons to whom the Software is 
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in 
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+# THE SOFTWARE.
+
+parse_config()
+{
+  INST_ARCH=`uname -m`
+
+  case $INST_ARCH in 
+  i[3-6]86)
+    OPKG_CONFIG_FILE=$YOCTOADT_OPKG_CONF_FILE_32
+    OECORE_NATIVE_SYSROOT="$INSTALL_FOLDER/sysroots/$INST_ARCH$SDK_VENDOR-linux/"
+    ;;
+  x86_64)
+    OPKG_CONFIG_FILE=$YOCTOADT_OPKG_CONF_FILE_64
+    OECORE_NATIVE_SYSROOT="$INSTALL_FOLDER/sysroots/x86_64$SDK_VENDOR-linux/"
+    ;;
+  *)
+    echo_info "[ADT_INST] Error: Installation Machine is not supported!"
+    exit -1
+    ;;
+  esac
+}
+
+get_sudo_app()
+{
+  username=$(id -nu)
+
+  # find the owner of the parent
+  dir=$1
+  while [ 1 ]; do
+      if [ -d $dir ]; then
+          owner=$(stat -c %U $dir)
+          break
+     else
+          dir=$(dirname $dir)
+     fi
+  done
+
+  if [ "$owner" = "$username" ]; then
+      true
+  else
+      echo sudo
+  fi
+}
+
+# this function accepts arch_type (x86, x86_64, arm, ppc, mips) as the first
+# argument, returning the location of the target rootfs
+get_target_rootfs_location() {
+	[ -z "$1" ] && return
+
+	arch_type=$1
+	# rootfs extraction directory
+	target_sysroot_var="\$YOCTOADT_TARGET_SYSROOT_LOC_$arch_type"
+	target_sysroot=`eval echo $target_sysroot_var`
+
+	if [ "$target_sysroot" == "" ]; then
+		return
+	else
+		echo "`readlink -m $target_sysroot`"
+	fi
+}
+
+
+#let us install a qemu-native firstly
+#installation step 2
+install_native_sdk()
+{
+
+echo_info "\nStart installing selected native ADT for archs: $YOCTOADT_TARGETS..."
+
+# where the packages are installed.
+NATIVE_INSTALL_DIR=$INSTALL_FOLDER
+
+if [ -d "$INSTALL_FOLDER" ]; then
+  echo_info "\nNative ADT installation directory \"$INSTALL_FOLDER\" already exists! Continue installation will override its contents!"
+  confirm_install $1
+fi
+
+#Now begin to install native sdk and extract qemu rootfs which needs privilege rights
+#depending on the install location
+SUDO=$(get_sudo_app $NATIVE_INSTALL_DIR)
+if [ -n "$SUDO" ]; then
+  echo_info "#######################################################################"
+  echo_info "Please note from this point on installation requires sudo password ..."
+  echo_info "#######################################################################"
+fi
+
+#we need to make this directory firstly since opkg need to use it.
+OPKG_LOCK_DIR="$NATIVE_INSTALL_DIR/$OPKG_LIBDIR/opkg"
+if [ ! -d "$OPKG_LOCK_DIR" ]; then
+  $SUDO mkdir -p $OPKG_LOCK_DIR
+  echo_info "Successfully create directory $OPKG_LOCK_DIR. "
+#if user delete /opt/xxx, while dangling folders there, report error
+elif [ ! -d "$INSTALL_FOLDER" ]; then
+  echo_info "\nDangling opkg cache folder $OPKG_LOCK_DIR detected. Continue installation will remove the folder!"
+  confirm_install $1
+  $SUDO rm -rf $OPKG_LOCK_DIR
+  $SUDO mkdir -p $OPKG_LOCK_DIR
+#if user are updating installing, just let him/her go, give her/him prompt
+else
+  echo_info "ADT has already been installed. Will update its contents..."
+fi
+
+#first update repository
+if [ "x$SUDO" = "x" ]; then
+    OPKG_CMD="$LOCAL_OPKG_LOC/bin/opkg"
+else
+    OPKG_CMD="sudo -E $LOCAL_OPKG_LOC/bin/opkg"
+fi
+
+echo_info "Updating opkg..."
+$OPKG_CMD -f $OPKG_CONFIG_FILE -o $NATIVE_INSTALL_DIR update &>> $YOCTOADT_INSTALL_LOG_FILE
+check_result
+echo_info "opkg update process ended..."
+
+#install below must sdk-host packages
+OPKG_INSTALL_CMD="$OPKG_CMD "
+OPKG_INSTALL_NATIVE_CMD="$OPKG_INSTALL_CMD  --force-overwrite -f $OPKG_CONFIG_FILE -o $NATIVE_INSTALL_DIR install"
+
+BASE_HOSTSDK_PKGNAMES="pseudo opkg pkgconfig libtool autoconf automake"
+for pkg in $BASE_HOSTSDK_PKGNAMES; do
+  echo_info "Installing ${pkg} nativesdk ...\n"
+  $OPKG_INSTALL_NATIVE_CMD nativesdk-${pkg} &>> $YOCTOADT_INSTALL_LOG_FILE
+  check_result
+done
+
+for target_type in $YOCTOADT_TARGETS; do
+  machine_var="\$YOCTOADT_TARGET_MACHINE_$target_type"
+  machine=`eval echo $machine_var`
+  echo_info "Installing cross canadian packages for $machine ..."
+  $OPKG_INSTALL_NATIVE_CMD packagegroup-cross-canadian-$machine &>> $YOCTOADT_INSTALL_LOG_FILE
+  check_result
+
+  target_sysroot=`get_target_rootfs_location $target_type`
+  [ -z "$target_sysroot" ] && continue
+
+  # get the environment setup script paths: original (the one before relocation)
+  # and relocated
+  env_script_original=`$OPKG_CMD -f $OPKG_CONFIG_FILE -o $NATIVE_INSTALL_DIR files meta-environment-$machine|\
+							grep environment-setup`
+  env_script_relocated=$INSTALL_FOLDER/${env_script_original##*/}
+
+  # opkg will not install packagegroup-cross-canadian package if it was already
+  # installed. So, the environment script is in one place or the other.
+  [ -e "$INSTALL_FOLDER/$env_script_original" ] && env_script=$INSTALL_FOLDER/$env_script_original
+  [ -e "$env_script_original" ] && env_script=$env_script_original
+  [ -e "$env_script_relocated" ] && env_script=$env_script_relocated
+
+  $SUDO sed -i -e "s%SDKTARGETSYSROOT=.*%SDKTARGETSYSROOT=$target_sysroot%g" $env_script
+done
+
+if [ "$YOCTOADT_QEMU" == "Y" ] || [ "$YOCTOADT_QEMU" == "y" ]; then
+  echo_info "\nInstalling qemu native ..."
+  $OPKG_INSTALL_NATIVE_CMD nativesdk-qemu &>> $YOCTOADT_INSTALL_LOG_FILE
+  check_result
+  $OPKG_INSTALL_NATIVE_CMD nativesdk-qemu-helper &>> $YOCTOADT_INSTALL_LOG_FILE
+  check_result
+fi
+
+if [ "$YOCTOADT_NFS_UTIL" == "Y" ] || [ "$YOCTOADT_NFS_UTIL" == "y" ]; then
+  echo_info "\nInstalling unfs ..."
+  $OPKG_INSTALL_NATIVE_CMD nativesdk-unfs3 &>> $YOCTOADT_INSTALL_LOG_FILE
+  check_result
+fi
+
+# Lose the ./opt/${DISTRO}/${SDK_VERSION} part, we don't really need to keep
+# the entire directory structure. We could patch opkg to do that but it's far
+# simpler to do that here and achieve the same result.
+# This is done in two steps:
+if [ -d $NATIVE_INSTALL_DIR/$DEFAULT_INSTALL_FOLDER ]; then
+    # Step 1: copy ./opt/${DISTRO}/${SDK_VERSION} contents to $NATIVE_INSTALL_DIR.
+    # We cannot use move if $NATIVE_INSTALL_DIR is not empty (for example: contains
+    # another SDK)
+    $SUDO cp -r $NATIVE_INSTALL_DIR/$DEFAULT_INSTALL_FOLDER/* $NATIVE_INSTALL_DIR
+
+    # delete the source directory now
+    $SUDO rm -rf $NATIVE_INSTALL_DIR/$DEFAULT_INSTALL_FOLDER/*
+
+    # Step 2: Delete the ./opt/${DISTRO}/${SDK_VERSION} directories too, they should be empty
+    dir=$NATIVE_INSTALL_DIR/$DEFAULT_INSTALL_FOLDER
+    while [ "$dir" != "$NATIVE_INSTALL_DIR" ]; do
+        # if the user chose / as the install folder, then we should leave /opt in place
+        if [ "$dir" = "/opt" ]; then
+            break
+        fi
+
+        # try to delete the directory, only if it's empty
+        $SUDO rmdir $dir
+        if [ $? -ne 0 ]; then
+            break
+        fi
+
+        # go to the next directory
+        dir=$(dirname $dir)
+    done
+    # Step 3: Rewrite the *.list files to contain the correct paths
+    $SUDO find $NATIVE_INSTALL_DIR/var/lib/opkg -type f -exec sed -i -e '#^$DEFAULT_INSTALL_FOLDER#$NATIVE_INSTALL_DIR#' {} \;
+fi
+
+# Link the ld.so.cache file into the hosts filesystem
+if [ ! -f "$OECORE_NATIVE_SYSROOT/etc/ld.so.cache" ]; then
+echo_info "Link the ld.so.cache file into the host filesystem"
+$SUDO ln -s /etc/ld.so.cache $OECORE_NATIVE_SYSROOT/etc/ld.so.cache
+check_result
+fi
+
+# relocate binaries
+echo_info "\nRelocating binaries ..."
+escaped_sdkpath=$(echo $DEFAULT_INSTALL_FOLDER |sed -e "s:[\+\.]:\\\\\\\\\0:g")
+
+# We don't change the script in-place since we may want the user to re-run
+# adt-installer script
+sed -e "s:##DEFAULT_INSTALL_DIR##:$escaped_sdkpath:" scripts/relocate_sdk.py > scripts/relocate_sdk_tmp.py
+chmod +x scripts/relocate_sdk_tmp.py
+
+dl_path=$(find $OECORE_NATIVE_SYSROOT/lib -name "ld-linux*")
+executable_files=$(find $OECORE_NATIVE_SYSROOT -type f -perm /111)
+
+$SUDO scripts/relocate_sdk_tmp.py $INSTALL_FOLDER $dl_path $executable_files
+check_result
+
+# replace /opt/${DISTRO}/${SDK_VERSION} with the install folder in all configs
+env_setup_script=$(find $NATIVE_INSTALL_DIR/ -name "environment-setup-*")
+$SUDO sed -i -e "s:$DEFAULT_INSTALL_FOLDER:$NATIVE_INSTALL_DIR:g" $env_setup_script
+
+find $OECORE_NATIVE_SYSROOT -type f -exec file '{}' \; | grep ":.*\(ASCII\|script\|source\).*text" | \
+    cut -d':' -f1 | xargs $SUDO sed -i -e "s:$DEFAULT_INSTALL_FOLDER:$NATIVE_INSTALL_DIR:g"
+
+# change all symlinks pointing to /opt/${DISTRO}/${SDK_VERSION}
+for l in $(find $NATIVE_INSTALL_DIR -type l); do
+    $SUDO ln -sfn $(readlink $l|sed -e "s:$DEFAULT_INSTALL_FOLDER:$NATIVE_INSTALL_DIR:") $l
+done
+
+# find out all perl scripts in $OECORE_NATIVE_SYSROOT and modify them
+# replacing the host perl with SDK perl.
+for perl_script in $($SUDO grep -m 1 "^#!.*perl" -rl $OECORE_NATIVE_SYSROOT); do
+    $SUDO sed -i -e "s:^#! */usr/bin/perl.*:#! /usr/bin/env perl:g" -e \
+        "s: /usr/bin/perl: /usr/bin/env perl:g" $perl_script
+done
+
+echo_info "\nSuccessfully installed selected native ADT!"
+}
+
+#Need three input params, $1 -- arch_type(arm powerpc x86 mips) #2 -- user installation type
+#customer or scilent
+
+install_target()
+{
+
+target_sysroot=`get_target_rootfs_location $1`
+[ -z "$target_sysroot" ] && return 0
+
+target_sysroot_image_var="\$YOCTOADT_TARGET_SYSROOT_IMAGE_$1"
+target_sysroot_image=`eval echo $target_sysroot_image_var`
+if [ "$target_sysroot_image" == "" ]; then
+  echo_info "[ADT_INST] Error: YOCTOADT_TARGET_SYSROOT_IMAGE_$1 selection is empty, failed to create target sysroot!"
+  return 1
+fi
+
+echo_info "Installing target sysroot for arch: $1, rootfs type: $target_sysroot_image, location: $target_sysroot"
+
+target_machine_var="\$YOCTOADT_TARGET_MACHINE_$1"
+target_machine=`eval echo $target_machine_var`
+sysroot_image_name="core-image-$target_sysroot_image-$target_machine.tar.bz2"
+    #echo_info "Extracting rootfs: $sysroot_image_name, using pseudo..."
+
+# sudo password might be needed to install the target sysroot
+SUDO=$(get_sudo_app $target_sysroot)
+
+$SUDO scripts/extract_rootfs $sysroot_image_name $target_sysroot $OECORE_NATIVE_SYSROOT $user_inst_type
+check_result
+}
+
+
+#Main part
+. scripts/data_define
+. scripts/util
+
+parse_config
+
+#secondly we will start to install native tools
+user_inst_type=$1
+install_native_sdk $user_inst_type
+check_result
+
+for arch_type in $YOCTOADT_TARGETS; do
+  install_target $arch_type
+  check_result
+done
+
+
diff --git a/meta/recipes-devtools/installer/adt-installer/scripts/data_define b/meta/recipes-devtools/installer/adt-installer/scripts/data_define
new file mode 100644
index 0000000..cfd6716
--- /dev/null
+++ b/meta/recipes-devtools/installer/adt-installer/scripts/data_define
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Yocto ADT Installer
+#
+# Copyright 2010-2011 by Intel Corp.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy 
+# of this software and associated documentation files (the "Software"), to deal 
+# in the Software without restriction, including without limitation the rights 
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+# copies of the Software, and to permit persons to whom the Software is 
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in 
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+# THE SOFTWARE.
+
+config_file="adt_installer.conf"
+source `pwd`/$config_file
+
+LOCAL_OPKG_LOC="./opkg/build/opkg"
+LOCAL_OPKG_FOLDER="./opkg/build"
+
+# List all supported root fs types and target types,
+# it will be used in user configuration validity checking
+YOCTOADT_SUPPORTED_ROOTFS="minimal minimal-dev sato sato-dev sato-sdk lsb lsb-dev lsb-sdk"
+YOCTOADT_SUPPORTED_TARGETS="x86 x86_64 arm ppc mips"
+# Different host (32 bit or 64 bit) will have different opkg
+# configuration files
+YOCTOADT_OPKG_CONF_FILE_32="./opkg/conf/opkg-sdk-i686.conf"
+YOCTOADT_OPKG_CONF_FILE_64="./opkg/conf/opkg-sdk-x86_64.conf"
diff --git a/meta/recipes-devtools/installer/adt-installer/scripts/extract_rootfs b/meta/recipes-devtools/installer/adt-installer/scripts/extract_rootfs
new file mode 100755
index 0000000..d1a595b
--- /dev/null
+++ b/meta/recipes-devtools/installer/adt-installer/scripts/extract_rootfs
@@ -0,0 +1,67 @@
+#!/bin/bash
+
+# Yocto ADT Installer
+#
+# Copyright 2010-2011 by Intel Corp.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy 
+# of this software and associated documentation files (the "Software"), to deal 
+# in the Software without restriction, including without limitation the rights 
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+# copies of the Software, and to permit persons to whom the Software is 
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in 
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+# THE SOFTWARE.
+
+extract_rootfs()
+{
+
+  native_sysroot=$3
+  target_sysroot=$2
+  PSEUDO_COMMAND="$native_sysroot/usr/bin/pseudo"
+  TAR_OPTS="-xjf"
+  PSEUDO_OPTS="-P $native_sysroot/usr"
+
+
+  rm -rf $PSEUDO_LOCALSTATEDIR
+
+  if [ -d "$target_sysroot" ]; then
+    echo_info "\nTarget sysroot location: $target_sysroot, already exists! If you continue installation, this folder will be re-created."
+    confirm_install $4
+    rm -rf "$target_sysroot"
+  fi
+
+  if [ ! -d "$target_sysroot" ]; then
+    echo_info "Creating directory $target_sysroot..."
+    mkdir -p "$target_sysroot"
+  fi
+
+  pseudo_state_dir="$target_sysroot/../$(basename "$target_sysroot").pseudo_state"
+  mkdir -p "$pseudo_state_dir"
+  touch "$pseudo_state_dir/pseudo.pid"
+  PSEUDO_LOCALSTATEDIR="$pseudo_state_dir"
+  export PSEUDO_LOCALSTATEDIR
+
+  echo_info "Extracting rootfs: $1, using pseudo..."
+  $PSEUDO_COMMAND $PSEUDO_OPTS tar -C $2 "$TAR_OPTS" $LOCAL_DOWNLOAD/$1 &>> $YOCTOADT_INSTALL_LOG_FILE
+  check_result
+}
+
+#Main part
+. scripts/util
+
+#Parameter detail is listed below:
+#Param 4: Silent install or customize install
+#Param 3: OECORE_NATIVE_SYSROOT
+#Param 2: user defined rootfs extraction directory
+#param 1: sysroot image name
+extract_rootfs $1 $2 $3 $4
diff --git a/meta/recipes-devtools/installer/adt-installer/scripts/util b/meta/recipes-devtools/installer/adt-installer/scripts/util
new file mode 100644
index 0000000..9be7517
--- /dev/null
+++ b/meta/recipes-devtools/installer/adt-installer/scripts/util
@@ -0,0 +1,104 @@
+#!/bin/bash
+
+# Yocto ADT Installer
+#
+# Copyright 2010-2011 by Intel Corp.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy 
+# of this software and associated documentation files (the "Software"), to deal 
+# in the Software without restriction, including without limitation the rights 
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
+# copies of the Software, and to permit persons to whom the Software is 
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in 
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+# THE SOFTWARE.
+
+echo_info()
+{
+  echo -e $1 | tee -a $YOCTOADT_INSTALL_LOG_FILE
+}
+
+select_install_type()
+{
+# If choosing silent install, all older installation data will be
+# overriden without user's interaction
+while true; do
+  #echo_info "[ADT_INST] Silent install means overrides all existing older"
+  #echo_info "[ADT_INST] data and the installation needs least user interaction"
+  #echo_info "[ADT_INST] If you want to use silent installation, please enter S:"
+  #echo_info "[ADT_INST] If you want to customize installation, please enter C:"
+  #echo_info "[ADT_INST} If you want to exit current installation, please enter X:"
+  echo_info "There're two ways you can do installation: silent mode or interactive mode. To choose silent mode, which means you opt for the system to override the existing data under the specified installation directories without prompting for your confirmation.  Please be cautious with this selection which may trigger your losing data.  With the interactive mode, you have to closely monitor the installation process, since it will prompt you each step it needs to override some existing data.  To choose silent mode, please enter [S], for interactive mode, please enter [I] or [X] to exit the installation."
+  echo_info "[ADT_INST] Please enter your selections here:"
+  read YOCTOADT_SEL
+  YOCTOADT_SEL=`tr '[a-z]' '[A-Z]'<<<"$YOCTOADT_SEL"`
+  if [ "$YOCTOADT_SEL" == "S" ]; then
+    return "0"
+  elif [ "$YOCTOADT_SEL" == "I" ]; then
+    return "1"
+  elif [ "$YOCTOADT_SEL" == "X" ]; then
+    echo_info "\n############################################################"
+    echo_info "# User cancelled installation!"
+    echo_info "############################################################\n"
+    exit 1
+  fi
+done
+
+
+}
+
+confirm_install()
+{
+# below are prompt, make sure user still want to install even meet
+# some prompts
+
+#User likes to enjoy silent installation, we will not break his
+#installation process here
+if [ "$1" == "0" ]; then
+  return
+fi
+
+while true; do
+  echo_info "[ADT_INST] Do you want to continue installation? Please enter Y/N:"
+  read YOCTOADT_INSTALL
+  YOCTOADT_INSTALL=`tr '[a-z]' '[A-Z]'<<<"$YOCTOADT_INSTALL"`
+  if [ "$YOCTOADT_INSTALL" == "Y" ]; then
+    break
+  elif [ "$YOCTOADT_INSTALL" == "N" ]; then
+    echo_info "\n############################################################"
+    echo_info "# User cancelled installation!"
+    echo_info "############################################################\n"
+    exit 1
+  fi
+done
+}
+
+check_result()
+{
+  result=$?
+  if [ $result -eq 1 ]; then
+    exit -1
+  elif [  $result -ne 0 ]; then
+     echo_info "\n#############################################################################"
+     echo_info "# Meet error(s) when installing Yocto ADT! Please check log file for details. "
+     echo_info "#############################################################################\n"
+    exit -1
+  fi
+}
+
+# yocto adt installation log file
+YOCTOADT_INSTALL_LOG_FILE="adt_installer.log"
+# Temp folders holding qemu/rootfs downloaded images
+# It will be put into the installation folder
+LOCAL_DOWNLOAD="./download_image"
+
+