drbl 2.6.15-1 / usr / sbin / drbl-client-switch

#!/bin/bash
# Authors: Steven Shiau <steven _at_ nchc org tw> and Blake, Kuo-Lien Huang <klhaung _at_ gmail.com>, and Ceasar Sun <ceasar _at_ nchc org tw>
# License: GPL 
# Description: DRBL utitilty to switch the mode for clients.

# To use reboot, shutdown, wake-on-lan for Cygwin clients, you must put the
# ssh key to those Cygwin clients.

DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"

. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions
[ -e /etc/drbl/drbl-ocs.conf ] && . /etc/drbl/drbl-ocs.conf
[ -e $DRBL_SCRIPT_PATH/sbin/ocs-functions ] && . $DRBL_SCRIPT_PATH/sbin/ocs-functions

# Load the preset mode
# we need to know $drbl_ssi_mode...
[ -f "/etc/drbl/drbl_deploy.conf" ] && . /etc/drbl/drbl_deploy.conf

# Load the config in ocs-live.conf. This is specially for DRBL/Clonezilla live. It will overwrite some settings of drbl-ocs.conf, such as $DIA...
[ -e "/etc/ocs/ocs-live.conf" ] && . /etc/ocs/ocs-live.conf

#
# DIA (="dialog") is loaded from drbl.conf
MAX_DIALOG_HEIGHT="12"

#
check_if_root

check_if_run_in_drbl_server $0

# get the OS_Version and OS_type
check_distribution_name

# load user's default setting
[ -e "$HOME/.dcsrc" ] && . $HOME/.dcsrc

# function
USAGE() {
   echo "Usage: $0 [OPTION] MODE [MODE2]"
   echo "OPTION"
   language_help_prompt_by_idx_no
   echo "-h, --host [IP_LIST|MAC_LIST] Instead of all DRBL clients, assign some DRBL clients (IP_LIST or MAC_LIST) to be processed, if IP_LIST or MAC_LIST is not set, a dialog menu will be shown so that the target DRBL client(s) can be selected. The IP_LIST is like: \"192.168.0.1 192.168.0.2\", and the MAC_LIST is like \"00:50:56:01:02:01 00:50:56:01:02:02\". NOTE!!! You must put \" \" before and after the IP_LIST or MAC_LIST!"
   echo "-nl, --no-list-host   Set all clients' mode (This is default)"
   dialog_like_prog_help_prompt
   echo "MODE:"
   echo "remote-linux-gra      Client machine will boot from DRBL server,"
   echo "                      and enter graphic mode, for powerful client."
   echo "remote-linux-txt      Client machine will boot from DRBL server,"
   echo "                      and enter text mode, for powerful client."
   echo "terminal              Remote display Linux, terminal mode."
   echo "remote-memtest        Remote boot to run memtest86"
   echo "remote-fdos           Remote boot to run FreeDOS"
   echo "clonezilla-start      Start Clonezilla mode"
   echo "clonezilla-stop       Stop the clonezilla mode"
   echo "local                 Client machine will boot from local (now PXE only)"
   echo "reboot                Reboot DRBL clients now"
   echo "shutdown              Shutdown DRBL clients now"
   echo "Wake-on-LAN           Turn on DRBL clients by Wake-on-LAN now"
   echo "netinstall            Let clients to install Linux distribution via network (PXE/etherboot)"
   echo 
   echo "MODE2:"
   echo "Based on MODE, assign the 2nd level mode:"
   echo "For MODE=clonezilla-start, available MODE2:"
   echo "save-disk: Clonezilla save disk mode"
   echo "restore-disk: Clonezilla restore disk Mode"
   echo "save-parts: Clonezilla save partitions mode"
   echo "restore-parts: Clonezilla restore partitions mode"
   echo "select-in-client: Select mode in client"
   echo "For MODE=more, available MODE2:"
   echo "switch-pxe-menu       Switch DRBL client menus"
   echo "switch-pxe-bg-mode    Switch PXE Linux background"
   echo "drbl-mode             Switch diskless linux mode" 
   echo "clonezilla-mode       Switch clonezilla mode" 
   echo "login-switch          Switch DRBL client login mode"
   echo "switch-drbl-serv      Start, stop or restart DRBL related services in DRBL server"
   echo "client-reautologin    Force to restart client autologin" 
   echo "clean-autologin-account Delete all autologin accounts" 
   echo "re-deploy             Re-deploy files to clients, i.e. update the files of server to clients."
   echo "clean-dhcpd-lease     Force to reset DHCP IP address leases" 
   echo 
   echo "If no argument is specified, a dialog will appear to let you choose the mode!"
   echo
   echo "EXAMPLE"
   echo "  To turn off the local and memtest boot menues of clients, run:"
   echo "  $0 -nl more switch-pxe-menu '-i local -i memtest hide'"
   echo "  To switch client's PXE boot menu as graphic mode, run:"
   echo "  $0 -nl more switch-pxe-bg-mode graphic"
   echo "  To restart drbl-related service, run:"
   echo "  $0 -nl more switch-drbl-serv restart"
} # Endo of USAGE

# function : stop_ocs
stop_ocs_if_necessary() {
  # $IP_LIST and $OCS_OPTS are global variables
  # if "LIST_HOST" is NOT nothing, we will process those clients... use the
  # -h parameter of drbl-ocs.
  if [ -f "$ocs_lock_dir/clonezilla.lock" ]; then
    echo "Your system is already in clonezilla mode... we will stop it first, then change to other mode..."
   if [ -n "$IP_LIST" ]; then 
     drbl-ocs -n $OCS_OPTS -h "$IP_LIST" -l $lang stop
   else
     drbl-ocs -n $OCS_OPTS -l $lang stop
   fi
  fi
}

#
mcast_clonezilla_restore_not_for_all_clients_warning() {
  $DIA --title "$msg_multicast_clonezilla_warning" --clear \
       --msgbox "$msg_multicast_clonezilla_warning_des" 0 0
}

#
ask_if_want_list_host() {
  local TMP mode
  if [ -z "$dcs_choose_client" ]; then
    TMP=$(mktemp /tmp/menu.XXXXXX)
    trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
    $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
    "$msg_nchc_drbl" --menu "$msg_hint_multiple_choice_select_by_space \n$msg_select_all_clients_or_select_part_them \n$msg_choose_mode:" \
    0 0 0 \
    "All"  "$msg_select_all_clients" \
    "Part" "$msg_select_clients" \
    2> $TMP
    dcs_choose_client="$(cat $TMP)"
    [ -f "$TMP" ] && rm -f $TMP
  fi
  case "$dcs_choose_client" in
    All)
      LIST_HOST="off";;
    Part)
      LIST_HOST="on";;
    *)
      [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
      echo "$msg_program_stop!"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      exit 1
  esac
} # end of ask_if_want_list_host
#
ask_if_input_save_image_name_in_server() {
  local save_type=$1
  local TMP mode ans_
  if [ -z "$dcs_input_img_name" ]; then
    TMP="$(mktemp /tmp/menu.XXXXXX)"
    trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
    $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
    "$msg_nchc_clonezilla | $msg_mode: $ocs_mode_prompt" --menu "$msg_title_input_save_image_name_in_server \n$msg_ask_if_input_save_image_name_in_server \n$msg_choose_mode:" \
    0 0 0 \
    "Now_in_server"  "$msg_now_input_in_server" \
    "Later_in_client" "$msg_later_input_in_client" \
    2> $TMP
    dcs_input_img_name="$(cat $TMP)"
    [ -f "$TMP" ] && rm -f $TMP
  fi

  # Check input option
  case "$dcs_input_img_name" in
    "Now_in_server"|"Later_in_client") true;;
    *)
      [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
      echo "\"$dcs_input_img_name\" is an unknown or unsupported mode! You must assign a correct option for dcs_input_img_name!"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      echo "$msg_program_stop!"
      exit 1
      ;;
  esac

  if [ "$dcs_input_img_name" = "Now_in_server" ]; then
    local ANS_TMP=`mktemp /tmp/ocs_ans.XXXXXX`
    local ASK_IMG_NAME=1
    trap "[ -f "$ANS_TMP" ] && rm -f $ANS_TMP" HUP INT QUIT TERM EXIT
    while [ "$ASK_IMG_NAME" -ne 0 ]; do
      get_input_image_name $ANS_TMP
      input_save_img_name="$(cat $ANS_TMP)"
      if [ "$input_save_img_name" = "ask_user" ]; then
         $DIA --backtitle "$msg_nchc_free_software_labs" --title "$msg_nchc_clonezilla | $msg_mode: $ocs_mode_prompt" \
        --msgbox "$msg_ask_user_is_reserved_for_save_mode\n$msg_please_do_it_again!!!" 0 0 
      else
	 ASK_IMG_NAME=0
      fi
    done
    [ -f "$ANS_TMP" ] && rm -f $ANS_TMP

    local TMP=`mktemp /tmp/ocs_name.XXXXXX`
    local dev_prompt_and_example
    local ASK_DEV_NAME=1
    trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
    case "$save_type" in
     "savedisk")
           dev_prompt_and_example="$msg_input_device_name ($msg_ex: 'hda' $msg_or 'sda' $msg_or 'hda hdb' $msg_or 'sda sdb') \n$msg_linux_disk_MS_mapping"
	   # savedisk_preset is from drbl-ocs.conf
	   dev_preset="$savedisk_preset"
           ;;
     "saveparts")
           dev_prompt_and_example="$msg_input_device_name ($msg_ex: 'hda1 hda2' $msg_or 'sda1 sda2') \n$msg_linux_parts_MS_mapping"
	   # saveparts_preset is from drbl-ocs.conf
           dev_preset="$saveparts_preset"
           ;;
    esac
    while [ "$ASK_DEV_NAME" -ne 0 ]; do
      $DIA --backtitle "$msg_nchc_free_software_labs" --title "$msg_nchc_clonezilla | $msg_mode: $ocs_mode_prompt" \
      --inputbox "$dev_prompt_and_example" 0 0 "$dev_preset" 2> $TMP
      input_device_name="$(cat $TMP)"
      if [ -z "$input_device_name" ]; then
        $DIA --backtitle "$msg_nchc_free_software_labs" --title "$msg_nchc_clonezilla | $msg_mode: $ocs_mode_prompt" \
        --yesno "$msg_you_must_input_device_name_to_save_image! $msg_do_u_want_to_do_it_again" 0 0 
        ans_="$?"
        case "$ans_" in
          0) # yes is chosen
             ASK_DEV_NAME=1;;
          1) # no is chosen
             echo "$msg_program_stop!"
             [ -f "$TMP" ] && rm -f $TMP
             exit 1;;
        esac
      else
        ASK_DEV_NAME=0
      fi
    done
    [ -f "$TMP" ] && rm -f $TMP
  fi
} # end of ask_if_input_save_image_name_in_server
#
run_login_switch() {
  local action="$1"
  local TMP
  if [ -z "$action" ]; then
    TMP="$(mktemp /tmp/menu.XXXXXX)"
    trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
    echo "Switch DRBL client login mode"
    $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
    "$msg_login_switch" --menu "$msg_choose_action:" \
    0 0 0 \
    "normal"  "$msg_normal_login" \
    "auto"    "$msg_auto_login" \
    "timed"   "$msg_timed_login" \
    2> $TMP
    action="--""$(cat $TMP)"
    [ -f "$TMP" ] && rm -f $TMP
  fi
  [ -z "$action" ] && echo "You must specify the action! Program terminated!!!" && exit 1
  # If the mode is autologin or timed login graphic mode, we should switch to graphic mode first.
  if [ "$action" = "--auto" -o "$action" = "--timed" ]; then
    echo "Set the client as remote-linux graphic mode..."
    if [ "$LIST_HOST" = "on" ]; then
      drbl-client-switch -l $lang -h "$IP_LIST" remote-linux-gra
    else
      drbl-client-switch -l $lang -nl remote-linux-gra
    fi
  fi
  drbl-login-switch $action -l $lang
} # end of run_login_switch
#
run_drbl_mode_switch() {
  local drbl_mode_opt="$1"
  local TMP
  if [ -z "$drbl_mode_opt" ]; then
    TMP="$(mktemp /tmp/menu.XXXXXX)"
    trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
    $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
    "$msg_drbl_mode_switch" --menu "$msg_drbl_mode_switch_long" \
    0 0 0 \
    "0" "$msg_drbl_mode_0" \
    "1" "$msg_drbl_mode_1" \
    "2" "$msg_drbl_mode_2" \
    2> $TMP
    drbl_mode_opt="$(cat $TMP)"
    [ -f "$TMP" ] && rm -f $TMP
  fi
  if [ -n "$drbl_mode_opt" ]; then
    drbl_mode_opt="-d $drbl_mode_opt"
  else
    echo "You must specify the drbl_mode_opt! Program terminated!!!"
    exit 1
  fi
  tune-clientdir-opt -l $lang $drbl_mode_opt
} # end of run_drbl_mode_switch
#
run_clonezilla_mode_switch() {
  local clonezilla_mode_opt="$1"
  local TMP2
  if [ -z "$clonezilla_mode_opt" ]; then
    TMP2="$(mktemp /tmp/menu2.XXXXXX)"
    trap "[ -f "$TMP2" ] && rm -f $TMP2" HUP INT QUIT TERM EXIT
    $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
    "$msg_clonezilla_mode_switch" --menu "$msg_clonezilla_mode_switch_long" \
    0 0 0 \
    "0"  "$msg_clonezilla_mode_0" \
    "1"  "$msg_clonezilla_mode_1" \
    "2"  "$msg_clonezilla_mode_2" \
    2> $TMP2
    clonezilla_mode_opt="$(cat $TMP2)"
    [ -f "$TMP2" ] && rm -f $TMP2
  fi
  if [ -n "$clonezilla_mode_opt" ]; then
    clonezilla_mode_opt="-z $clonezilla_mode_opt"
  else
    echo "You must specify the clonezilla_mode_opt! Program terminated!!!"
    exit 1
  fi
  tune-clientdir-opt -l $lang $clonezilla_mode_opt
} # end of run_drbl_clonezilla_mode_switch

do_clonezilla_save_dev() {
  # dev is: disk or parts
  local dev="$1"
  [ -z "$dev" ] && echo "You must specify the device type (parts or disk)!!! Program terminated!!!" && exit 1

  echo -n "Setting client as clonezilla-save-${dev} mode..."

  # ask if want to input the saved name now
  ask_if_input_save_image_name_in_server save${dev}

  # ask if want to set ocs extra param
  OCS_PARAM_TMP=`mktemp /tmp/ocs_param_tmp.XXXXXX`
  trap "[ -f "$OCS_PARAM_TMP" ] && rm -f $OCS_PARAM_TMP" HUP INT QUIT TERM EXIT
  set_drbl_ocs_extra_param save $OCS_PARAM_TMP $dev
  OCS_OPTS="$(cat $OCS_PARAM_TMP)"
  [ -f "$OCS_PARAM_TMP" ] && rm -f $OCS_PARAM_TMP

  stop_ocs_if_necessary
  run_again_fname="/tmp/ocs-${input_save_img_name:-input-later}-`date +%F-%H-%M`"
  if [ "$LIST_HOST" = "on" ]; then
    # NOTE: For prompt, we use \" to show ", but actually run it without \
    drbl-ocs $OCS_OPTS $dcs_save_extra_opt -h "$IP_LIST" -l $lang start${dev} save $input_save_img_name $input_device_name
    deploy_pxecfg_files
    [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
    # NOTE: For prompt, we use \" to show ", but actually run it without \
    echo PS. $msg_run_drbl_ocs_again_cmd 
    echo drbl-ocs -b $OCS_OPTS $dcs_save_extra_opt -h \"$IP_LIST\" -l $lang start${dev} save $input_save_img_name $input_device_name | tee $run_again_fname
    echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
    [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  else
    drbl-ocs $OCS_OPTS $dcs_save_extra_opt -l $lang start${dev} save $input_save_img_name $input_device_name
    deploy_pxecfg_files
    [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
    echo PS. $msg_run_drbl_ocs_again_cmd 
    echo drbl-ocs -b $OCS_OPTS $dcs_save_extra_opt -l $lang start${dev} save $input_save_img_name $input_device_name | tee $run_again_fname
    echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
    [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  fi
  [ -e "$run_again_fname" ] && chmod 755 $run_again_fname
  echo "done!"
} # end of do_clonezilla_save_dev

#
do_clonezilla_restore_dev() {
  # dev is: disk or parts
  local dev="$1"
  local target_image default_mcast_client_no=''
  [ -z "$dev" ] && echo "You must specify the device type (parts or disk)!!! Program terminated!!!" && exit 1
  # We won't provide the method to change the mount point to replace /home/partimag in dcs, so we fix the imagedir="$ocsroot" (/home/partimag). However, user still can use drbl-ocs to do that.
  #
  # change to other mount point for extra harddisk
  #if [ -n "$mount_point" ]; then
  #   imagedir="$mount_point" 
  #   echo "Using the mount point $imagedir."
  #else
  #   imagedir="$ocsroot"
  #fi
  imagedir="$ocsroot"

  echo -n "Setting client as clonezilla-restore-$dev mode..."

  # ask if want to set ocs extra param
  OCS_PARAM_TMP=`mktemp /tmp/ocs_param_tmp.XXXXXX`
  trap "[ -f "$OCS_PARAM_TMP" ] && rm -f $OCS_PARAM_TMP" HUP INT QUIT TERM EXIT
  set_drbl_ocs_extra_param restore $OCS_PARAM_TMP $dev
  OCS_OPTS="$(cat $OCS_PARAM_TMP)"
  [ -f "$OCS_PARAM_TMP" ] && rm -f $OCS_PARAM_TMP

  if [ -n "$(echo $OCS_OPTS | grep -E "\-[u]")" ]; then
    # with -u, we will choose the image in the client, so 
    # 1. do not ask image name here.
    # 2. only unicast available.
    [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
    echo "$msg_ocs_param_exclude_multicast"
    [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
    dcs_cast_mode="unicast"
  else
    # if no -u, we have to ask image name here.
    # get the image
    ANS_TMP=`mktemp /tmp/ocs_ans.XXXXXX`
    trap "[ -f "$ANS_TMP" ] && rm -f $ANS_TMP" HUP INT QUIT TERM EXIT
    get_existing_${dev}_image $ANS_TMP
    # the return name will be only one image name.
    target_image="$(cat $ANS_TMP)"
    [ -f "$ANS_TMP" ] && rm -f $ANS_TMP
    # Note! We won't add leading $ocsroot in $target_image, because when task_saveparts do the real job later, it will add that.
    
    # choose the only dev we want
    case "$dev" in
     "disk")
        ANS_TMP=`mktemp /tmp/ocs_ans.XXXXXX`
        trap "[ -f "$ANS_TMP" ] && rm -f $ANS_TMP" HUP INT QUIT TERM EXIT
	get_existing_disks_from_img $ANS_TMP $imagedir/$target_image
        # we have to remove " (comes with checklist in dialog) so that for loop
        # will work (Specially for FC3/4...)
        target_dev="$(cat $ANS_TMP | tr -d \")"
        [ -f "$ANS_TMP" ] && rm -f $ANS_TMP
        ;;
     "parts")
        ANS_TMP=`mktemp /tmp/ocs_ans.XXXXXX`
        trap "[ -f "$ANS_TMP" ] && rm -f $ANS_TMP" HUP INT QUIT TERM EXIT
	get_existing_partitions_from_img $ANS_TMP $imagedir/$target_image no restore
        # we have to remove " (comes with checklist in dialog) so that for loop
        # will work (Specially for FC3/4...)
        target_dev="$(cat $ANS_TMP | tr -d \")"
        [ -f "$ANS_TMP" ] && rm -f $ANS_TMP
        ;;
    esac

    # get the mode of unicast of multicast
    eval msg_choose_the_mode_to_restore_dev=\$msg_choose_the_mode_to_restore_$dev
    if [ -z "$dcs_cast_mode" ]; then
      TMP=$(mktemp /tmp/menu.XXXXXX)
      trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
      $DIA \
      --backtitle "$msg_nchc_title" \
      --title "$msg_nchc_clonezilla | $msg_mode: $ocs_mode_prompt" \
      --menu "$msg_choose_the_mode_to_restore_dev" 0 0 0 \
      "multicast" "$msg_multicast_restore" \
      "broadcast" "$msg_broadcast_restore" \
      "unicast" "$msg_unicast_restore" \
      2> $TMP
      dcs_cast_mode=$(cat $TMP) 
      [ -f "$TMP" ] && rm -f $TMP
    fi
  fi

  if [ -z "$dcs_cast_mode" ]; then
    echo "No mode is selected! Program terminated!!!" 
    exit 1
  fi
  case "$dcs_cast_mode" in
    "multicast"|"broadcast"|"unicast") true;;
    *)
      [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
      echo "\"$dcs_cast_mode\" is an unknown or unsupported mode! You must assign a correct option for dcs_cast_mode!"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      echo "$msg_program_stop!"
      exit 1 
      ;;
  esac

  run_again_fname="/tmp/ocs-$target_image-`date +%F-%H-%M`"
  if [ "$dcs_cast_mode" = "unicast" ]; then
    if [ "$LIST_HOST" = "on" ]; then
      # NOTE: For prompt, we use \" to show ", but actually run it without \
      drbl-ocs $OCS_OPTS $dcs_restore_extra_opt -h "$IP_LIST" -l $lang start${dev} restore $target_image $target_dev
      deploy_pxecfg_files
      [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
      echo PS. $msg_run_drbl_ocs_again_cmd 
      # NOTE: For prompt, we use \" to show ", but actually run it without \
      echo drbl-ocs -b $OCS_OPTS $dcs_restore_extra_opt -h \"$IP_LIST\" -l $lang start${dev} restore $target_image $target_dev | tee $run_again_fname
      echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
    else
      drbl-ocs $OCS_OPTS $dcs_restore_extra_opt -l $lang start${dev} restore $target_image $target_dev
      deploy_pxecfg_files
      [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
      echo PS. $msg_run_drbl_ocs_again_cmd 
      echo drbl-ocs -b $OCS_OPTS $dcs_restore_extra_opt -l $lang start${dev} restore $target_image $target_dev | tee $run_again_fname
      echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
    fi
  else
    # multicast or broadcast
    # Get the multicast options: time_to_wait, clients_to_wait...
    mcast_mode_opt=""
    ANS_TMP=`mktemp /tmp/ocs_ans.XXXXXX`
    trap "[ -f "$ANS_TMP" ] && rm -f $ANS_TMP" HUP INT QUIT TERM EXIT
    if [ "$LIST_HOST" = "on" ]; then
      default_mcast_client_no="$(LC_ALL=C echo $IP_LIST | wc -w)"
    fi
    ask_time_or_clients_to_wait $ANS_TMP $default_mcast_client_no
    . $ANS_TMP
    # we will get time_to_wait or client_to_want.
    [ -n "$time_to_wait" ] && mcast_mode_opt="$mcast_mode_opt --time-to-wait $time_to_wait"
    [ -n "$clients_to_wait" ] && mcast_mode_opt="$mcast_mode_opt --clients-to-wait $clients_to_wait"
    [ -n "$max_time_to_wait" ] && mcast_mode_opt="$mcast_mode_opt --max-time-to-wait $max_time_to_wait"
    [ -f "$ANS_TMP" ] && rm -f $ANS_TMP
    #
    [ "$dcs_cast_mode" = "broadcast" ] && mcast_mode_opt="$mcast_mode_opt --broadcast"

    stop_ocs_if_necessary

    if [ "$LIST_HOST" = "on" ]; then
      mcast_clonezilla_restore_not_for_all_clients_warning
      # NOTE: For prompt, we use \" to show ", but actually run it without \
      drbl-ocs $OCS_OPTS $dcs_restore_extra_opt $mcast_mode_opt -h "$IP_LIST" -l $lang start${dev} multicast_restore $target_image $target_dev
      deploy_pxecfg_files
      [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
      echo PS. $msg_run_drbl_ocs_again_cmd 
      # NOTE: For prompt, we use \" to show ", but actually run it without \
      echo drbl-ocs -b $OCS_OPTS $dcs_restore_extra_opt $mcast_mode_opt -h \"$IP_LIST\" -l $lang start${dev} multicast_restore $target_image $target_dev | tee $run_again_fname
      echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
    else
      drbl-ocs $OCS_OPTS $dcs_restore_extra_opt $mcast_mode_opt -l $lang start${dev} multicast_restore $target_image $target_dev
      deploy_pxecfg_files
      [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
      echo PS. $msg_run_drbl_ocs_again_cmd 
      echo drbl-ocs -b $OCS_OPTS $dcs_restore_extra_opt $mcast_mode_opt -l $lang start${dev} multicast_restore $target_image $target_dev | tee $run_again_fname
      echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
    fi
  fi
  [ -e "$run_again_fname" ] && chmod 755 $run_again_fname
  echo "done!"
} # end of do_clonezilla_restore_dev

#
do_clonezilla_select_in_client() {
  OCS_PARAM_TMP=`mktemp /tmp/ocs_param_tmp.XXXXXX`
  trap "[ -f "$OCS_PARAM_TMP" ] && rm -f $OCS_PARAM_TMP" HUP INT QUIT TERM EXIT
  #
  $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
  "$msg_clonezilla_advanced_extra_param" --menu "$msg_default_pxemenu_for_clone:" \
  0 0 0 $DIA_ESC \
  "-y1 "      "$msg_ocs_param_y1" \
  "-y0 "      "$msg_ocs_param_y0" \
  "-y2 "      "$msg_ocs_param_y2" \
  ""          "$msg_ocs_param_skip" \
  2> $OCS_PARAM_TMP
  # ask the action when clone finishes in client

  ocs_advanced_param_post_mode_after_clone $OCS_PARAM_TMP

  # force to strip the unnecessary quotation ', this is specially for dialog (from cdialog) in Mandriva. Otherwise it will cause -p reboot (containing space) becomes '-p reboot', which is wrong option in dcs.
  OCS_OPTS="$(cat $OCS_PARAM_TMP | sed -e "s/\'//g")"
  [ -f "$OCS_PARAM_TMP" ] && rm -f $OCS_PARAM_TMP

  stop_ocs_if_necessary
  run_again_fname="/tmp/ocs-select-in-client-`date +%F-%H-%M`"
  if [ "$LIST_HOST" = "on" ]; then
    drbl-ocs -h "$IP_LIST" -l $lang $OCS_OPTS select_in_client
    deploy_pxecfg_files
    [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
    echo "$msg_authentication_pxe_linux_info"
    [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
    echo PS. $msg_run_drbl_ocs_again_cmd 
    echo drbl-ocs -b -h \"$IP_LIST\" -l $lang $OCS_OPTS select_in_client | tee $run_again_fname
    echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
    [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  else
    drbl-ocs -l $lang $OCS_OPTS select_in_client
    deploy_pxecfg_files
    [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
    echo "$msg_authentication_pxe_linux_info"
    [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
    echo PS. $msg_run_drbl_ocs_again_cmd 
    echo drbl-ocs -b -l $lang $OCS_OPTS select_in_client | tee $run_again_fname
    echo "$msg_ocs_sr_again_command_saved_filename: $run_again_fname"
    [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  fi
  [ -e "$run_again_fname" ] && chmod 755 $run_again_fname
  echo "done!"
} # end of do_clonezilla_select_in_client

#
run_switch_drbl_service() {
  local action="$1"
  local TMP
  if [ -z "$action" ]; then
    TMP="$(mktemp /tmp/menu.XXXXXX)"
    trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
    echo "Switch DRBL related services in DRBL server"
    $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
    "$msg_switch_drbl_service" --menu "$msg_choose_action:" \
    0 0 0 \
    "start"    "$msg_start_drbl_all_services"  \
    "stop"     "$msg_stop_drbl_all_services"  \
    "restart"  "$msg_restart_drbl_all_services"  \
    "add"      "$msg_add_drbl_all_services"  \
    "del"      "$msg_del_drbl_all_services"  \
    2> $TMP
    action="$(cat $TMP)"
    [ -f "$TMP" ] && rm -f $TMP
    [ -z "$action" ] && echo "You must specify the action! Program terminated!!!" && exit 1
  fi
  drbl-all-service $action
} # end of run_switch_drbl_service
#
run-switch-pxe-bg-mode() {
  local action="$1"
  local TMP
  if [ -z "$action" ]; then
    TMP="$(mktemp /tmp/pxemenu.XXXXXX)"
    trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
    echo "Switch DRBL client PXE boot menu mode"
    $DIA --backtitle "$msg_nchc_free_software_labs" --title  \
    "$msg_switch_pxe_bg_mode" --menu "$msg_switch_pxe_bg_mode" \
    0 0 0 \
    "text"  "$msg_pxemenu_text" \
    "graphic" "$msg_pxemenu_graphic" \
    2> $TMP
    action="$(cat $TMP)"
    [ -f "$TMP" ] && rm -f $TMP
    [ -z "$action" ] && echo "You must specify the mode! Program terminated!!!" && exit 1
  fi
  switch-pxe-bg-mode -m $action
} # end of run-switch-pxe-bg-mode 
#
clean_stale_node_pxe_cfg(){
  # $PXE_CONF is global variable.
  # Clean all the previous saved config file.
  # These files maybe look like: 01-MAC address (with ":" -> "-"), something like C0A8XXXX (only for 192.168.x), default_skeleton
  echo -n "Clean all the previous saved PXELINUX config file if they exist..."
  for ifile in $PXELINUX_DIR/*; do
    [  "$ifile" != "$PXE_CONF" -a \
       "$ifile" != "$PXELINUX_DIR/bios" -a \
       "$ifile" != "$PXELINUX_DIR/efi32" -a \
       "$ifile" != "$PXELINUX_DIR/efi64" -a \
       -f "$ifile" ] && rm -f $ifile
  done
  echo "done!"
} # end of clean_stale_node_pxe_cfg
#
clean_stale_mac_cfg_for_pxelinux_or_not() {
  local ihlist="$*"
  local OCS_TMP ih MAC rm_stale_mac_cfg
  # In this case, use chooses to select client by IP address. Only IP style file will be created in $PXELINUX_DIR/. If no MAC address in dhcpd.conf, and we find some 01-MAC file in $PXELINUX_DIR/, we have to ask use if he want to clean those 01-MAC style files. Since we have no idea which one is for which IP address. Otherwise those stale 01-MAC will have higher priority then IP address style file. That will cause problem.
  if [ -n "$(ls $PXELINUX_DIR/01-* 2>/dev/null)" ]; then
    # prepare the HOSTNAME-IP-MAC table
    OCS_TMP=`mktemp /tmp/ocs_clean_tmp.XXXXXX`
    trap "[ -f "$OCS_TMP" ] && rm -f $OCS_TMP" HUP INT QUIT TERM EXIT
    parse_dhcpd_conf $OCS_TMP
    for ih in $ihlist; do
      MAC="$(grep ${ih} $OCS_TMP | awk -F" " '{print $3}')"
      if [ -z "$MAC" ]; then
        $DIA --title "$msg_nchc_free_software_labs" \
             --yesno "$msg_do_you_want_to_clean_all_stale_mac_cfg" 0 0 
        case $? in
          0)
            rm_stale_mac_cfg="yes";;
          1)
            rm_stale_mac_cfg="no";;
          255)
            echo "Box closed.";;
        esac
          if [ "$rm_stale_mac_cfg" = "yes" ]; then
    	    rm -fv $PXELINUX_DIR/01-*
            echo -n "$msg_press_enter_to_continue"
            read 
          fi
      fi
    done
    [ -f "$OCS_TMP" ] && rm -f $OCS_TMP
  fi
} # clean_stale_mac_cfg_for_pxelinux_or_not
#
deploy_pxecfg_files(){
  # This function will set the specific config or just keep the "default"
  if [ "$LIST_HOST" = "on" ]; then
    # specify the nodes if assigned by user
    echo "Create specific config for PXE client."
    set_specific_host_pxe_conf `cat $HOSTS_TMP`
  else
    # for all clients, so we just keep the file pxelinux.cfg/default, no others.
    echo "This is for all clients, so we remove other host-based PXE config files in $PXELINUX_DIR/ and keep $PXE_CONF only."
    clean_stale_node_pxe_cfg
  fi
} # end of deploy_pxecfg_files

# Parse command-line options
while [ $# -gt 0 ]; do
  case "$1" in
    -l|--language)
	shift
        if [ -z "$(echo $1 |grep ^-.)" ]; then
          # skip the -xx option, in case 
	  specified_lang="$1"
	  shift
        fi
	;;
    -h|--host)  
	    LIST_HOST="on"
            shift
            # skip the -xx option, in case 
            if [ -z "$(echo $1 |grep ^-.)" ]; then
	      # parse if the arg is MAC or IP, skip those not MAC or IP
              if [ -n "$(echo $1 | grep -E "^[[:space:]]*([[:alnum:]]+:){5}[[:alnum:]]+([[:space:]]|$)+")" -o -n "$(echo $1 | grep -E "^[[:space:]]*([[:digit:]]+\.){3}[[:digit:]]+([[:space:]]|$)+")" -o -z "$1" ] ; then
                IP_LIST=$1
                shift
	      else
		echo "\"$1\" is not a suitable IP_LIST or MAC_LIST !!! Program terminated!!!"
		exit 1
              fi
            fi
	    ;;
    -nl|--no-list-host)  
	    LIST_HOST="off" 
	    shift;;
    -d0|--dialog)  
            # $DIA, $DIA_OPT are used in dcs, it won't pass to drbl-ocs, ocs-sr.
	    DIA="dialog" 
	    DIA_OPT="-d0"
	    shift;;
    -d1|--Xdialog)  
	    DIA="Xdialog" 
	    DIA_OPT="-d1"
	    shift;;
    -d2|--whiptail)  
	    DIA="whiptail" 
	    DIA_OPT="-d2"
	    shift;;
    -d3|--gdialog)  
	    DIA="gdialog" 
	    DIA_OPT="-d3"
	    shift;;
    -d4|--kdialog)  
	    DIA="kdialog" 
	    DIA_OPT="-d4"
	    shift;;
    -*)     echo "${0}: ${1}: invalid option" >&2
            USAGE >& 2
            exit 2 ;;
    *)      break ;;
  esac
done

######
## main script
######
MODE="$1"
# We have two levels, like clonezilla-start save-disk
MODE2="$2"
MORE_OPT_for_MODE2="$3"

ask_and_load_lang_set $specified_lang

# check DIA
check_DIA_set_ESC $DIA

[ -z "$LIST_HOST" ] && ask_if_want_list_host

# 
if [ "$LIST_HOST" = "on" ]; then
  # We need 1 file and 1 variable to sepcify hosts, 
  # (1) file "HOSTS_TMP", which contains IP list or MAC list.
  # (2) variable "IP_LIST", which contains IP list only (if user specify MAC list, we will convert them to IP list based on dhcpd.conf)

  # NOTES: after the modification of PXE_CONF, we must run
  #       [ "$LIST_HOST" = "on" ] && set_specific_host_pxe_conf `cat $HOSTS_TMP`
  # to update the pxeconf (both for 01-MAC and IP)

  HOSTS_TMP="$(mktemp /tmp/hosts_tmp.XXXXXXX)"
  trap "[ -f "$HOSTS_TMP" ] && rm -f $HOSTS_TMP" HUP INT QUIT TERM EXIT
  MAC_LIST=""
  # The content of $HOSTS_TMP can be IP list or MAC list (generated by select-drbl-clients)
  if [ -z "$IP_LIST" ]; then
    select-drbl-clients $DIA_OPT -l $lang $HOSTS_TMP
    retval=$?
  else
    # user already specified the hosts, so we just put them in $HOSTS_TMP
    echo $IP_LIST > $HOSTS_TMP
    retval=$?
  fi
  if [ $retval -eq 0 ]; then
    # copy the skeleton file
    PXE_CONF="$PXELINUX_DIR/default_skeleton"
    cp -f $PXELINUX_DIR/default $PXE_CONF
  
    if grep -Eq "^[[:space:]]*([[:alnum:]]+:){5}[[:alnum:]]+([[:space:]]|$)+" $HOSTS_TMP; then
      # HOSTS_TMP is MAC list.
      # prepare the IP list if the HOSTS_TMP is MAC list.
      MAC_LIST="$(cat $HOSTS_TMP)"
      for imac in $MAC_LIST; do
        #IP="$(awk -F" " '/$imac/ {print $2}' $HOST_MAC_TABLE)"
        IP="$(grep -iE "$imac" $HOST_MAC_TABLE | awk -F" " '{print $2}')"
        IP_LIST="$IP_LIST $IP"
      done
    else
      # HOSTS_TMP is IP list.
      IP_LIST="$(cat $HOSTS_TMP)"
      clean_stale_mac_cfg_for_pxelinux_or_not $IP_LIST
    fi
  else
    echo "No client is selected! Abort!"
    exit 0
  fi
else
  PXE_CONF="$PXELINUX_DIR/default"
fi
# If clonezilla box mode, we have to suppress some functions
[ -f /etc/drbl/drbl_deploy.conf ] && . /etc/drbl/drbl_deploy.conf
#
if [ "$drbl_mode" != "none" ]; then
   # "remote-linux-gra" "$msg_remote_linux_graphic" off \
   remote_linux_gra_1="remote-linux-gra"
   remote_linux_gra_2="$(rep_whspc_w_udrsc "$msg_remote_linux_graphic")"
   # "remote-linux-txt" "$msg_remote_linux_text" off \
   remote_linux_txt_1="remote-linux-txt"
   remote_linux_txt_2="$(rep_whspc_w_udrsc "$msg_remote_linux_text")"
   # "terminal" "$msg_terminal" off \
   terminal_1="terminal"
   terminal_2="$(rep_whspc_w_udrsc "$msg_thin_client")"
   # "login-switch" "$msg_login_switch" off \
   login_switch_1="login-switch"
   login_switch_2="$(rep_whspc_w_udrsc "$msg_login_switch")"
   # "client-reautologin" "$msg_client_reautologin" off \
   client_reautologin_1="client-reautologin"
   client_reautologin_2="$(rep_whspc_w_udrsc "$msg_client_reautologin")"
   # "clean-autologin-account" "$msg_clean_autologin_account" off \
   clean_autologin_account_1="clean-autologin-account"
   clean_autologin_account_2="$(rep_whspc_w_udrsc "$msg_clean_autologin_account")"
   # "reset-autologin-account" "$msg_reset_autologin_account" off \
   reset_autologin_account_1="reset-autologin-account"
   reset_autologin_account_2="$(rep_whspc_w_udrsc "$msg_reset_autologin_account")"
fi
if [ "$clonezilla_mode" != "none" ]; then
   clonezilla_start_1="clonezilla-start" 
   clonezilla_start_2="$(rep_whspc_w_udrsc "$msg_clonezilla_start")"
   clonezilla_stop_1="clonezilla-stop"
   clonezilla_stop_2="$(rep_whspc_w_udrsc "$msg_clonezilla_stop")"
fi
if [ -n "$(ls $pxecfg_pd/*netinstall* 2>/dev/null )" ]; then
   netinstall_1="netinstall"
   netinstall_2="$(rep_whspc_w_udrsc "$msg_netinstall")"
fi

# Get the mode from use
if [ -z "$MODE" ]; then 
     TMP="$(mktemp /tmp/menu.XXXXXX)"
     trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
     $DIA \
     --backtitle "$msg_nchc_title" \
     --title "$msg_nchc_drbl" \
     --menu "$msg_switch_client_mode:" 0 0 0 \
     $remote_linux_gra_1 $remote_linux_gra_2 \
     $remote_linux_txt_1 $remote_linux_txt_2 \
     $terminal_1 $terminal_2 \
     "remote-memtest" "$msg_remote_memtest" \
     "remote-fdos" "$msg_remote_fdos" \
     $clonezilla_start_1 $clonezilla_start_2 \
     $clonezilla_stop_1 $clonezilla_stop_2 \
     $netinstall_1 $netinstall_2 \
     "local" "$msg_boot_client_local" \
     "reboot" "$msg_reboot_the_client" \
     "shutdown" "$msg_shutdown_the_client" \
     "Wake-on-LAN" "$msg_Wake_on_LAN" \
     "more" "$msg_dcs_more_modes" \
     2> $TMP
     MODE=$(cat $TMP)
     [ -f "$TMP" ] && rm -f $TMP
fi

# set the mode for PXE client
case "$MODE" in
  "remote-linux-gra") 
         echo "Settinig client as remote-linux graphic mode..."
         stop_ocs_if_necessary
         set-default-pxe-img -i drbl -c $PXE_CONF -l "$FULL_OS_Version $powerful_client_menu_label"
         if [ "$LIST_HOST" = "on" ]; then
           # now use --no-gen-ssi, but we will run drbl-gen-ssi-files when finished
	   drbl-powerful-thin-client --no-gen-ssi -p -h "$IP_LIST" -ln $lang
         else
           # now use --no-gen-ssi, but we will run drbl-gen-ssi-files when finished
	   drbl-powerful-thin-client --no-gen-ssi -p -ln $lang
         fi

	 deploy_pxecfg_files

         for host in $drblroot/*; do
           # if the LIST_HOST is on, skip those IP not listed in the $IP_LIST
	   if [ "$LIST_HOST" = "on" ]; then
	     [ -z "$(echo $IP_LIST | grep -E "\<${host##/*/}\>")" ] && continue
           fi

	   # 
           host_ip=$(basename $host)
           echo "Setting the remote-linux graphic mode for node IP = $host_ip"
	   if [ -e /etc/debian_version ]; then
             # Debian
             if [ -e /etc/b2d-release ]; then
	       # For B2D, it uses runlevel 5 for X 
               CLIENT_INIT="5"
             else
	       # For Debian, Ubuntu, it uses runlevel 2 for X 
               CLIENT_INIT="2"
             fi
             default_dm="$(drbl-check-dm -h $host_ip)"
             prepare_update_rc_d_env $host
             get_debian_ubuntu_init_serv_control_prog
             if [ "$dbn_ubn_serv_control_prog" = "use-insserv" ]; then
               # Use insserv
	       LC_ALL=C chroot $host/ insserv $default_dm &> /dev/null
	     else
               # Use update-rc.d
               LC_ALL=C chroot $host/ /usr/sbin/update-rc.d $default_dm start 99 2 3 4 5 . stop 05 0 1 6 . &> /dev/null
             fi
	     if [ -e "$host/etc/init/${default_dm}.conf" ]; then
               switch_upstart_service $host/etc/init/${default_dm}.conf on
	     fi
           else
             # RH-like or SUSE
             # set the init to 5, i.e. default is X
             CLIENT_INIT="5"
           fi
	   # Modify client's /etc/inittab
	   if [ -e "$host/etc/inittab" ]; then
             perl -p -i -e "s/^id:[0-9]:initdefault:/id:$CLIENT_INIT:initdefault:/g" $host/etc/inittab
           fi
	   # For systemd-like
           if [ -e "$host/etc/systemd/system/default.target" ]; then
             ln -fsv /lib/systemd/system/runlevel${CLIENT_INIT}.target $host/etc/systemd/system/default.target
           fi
         done
	 echo "done!"
         #
         echo "-------------------------------------------------------"
         if [ "$drbl_mode" = "drbl_ssi_mode" ]; then
           echo "Since it's in DRBL SSI mode, and some config files are modified in template client, creating template tarball for DRBL SSI..."
           drbl-gen-ssi-files
         fi
         ;;
  "remote-linux-txt") 
         echo "Settinig client as remote-linux text mode..."
         stop_ocs_if_necessary
         set-default-pxe-img -i drbl -c $PXE_CONF -l "$FULL_OS_Version $powerful_client_menu_label"
         if [ "$LIST_HOST" = "on" ]; then
           # now use --no-gen-ssi, but we will run drbl-gen-ssi-files when finished
	   drbl-powerful-thin-client --no-gen-ssi -p -h "$IP_LIST" -ln $lang
         else
           # now use --no-gen-ssi, but we will run drbl-gen-ssi-files when finished
	   drbl-powerful-thin-client --no-gen-ssi -p -ln $lang
	 fi

	 deploy_pxecfg_files

         for host in $drblroot/*; do
           # if the LIST_HOST is on, skip those IP not listed in the $IP_LIST
	   if [ "$LIST_HOST" = "on" ]; then
	     [ -z "$(echo $IP_LIST | grep -E "\<${host##/*/}\>")" ] && continue
           fi

           # 
           host_ip=$(basename $host)
           echo "Setting the remote-linux text mode for node IP = $host_ip"
	   if [ -e /etc/debian_version ]; then
             CLIENT_INIT="2"
             default_dm="$(drbl-check-dm -h $host_ip)"
             prepare_update_rc_d_env $host
             get_debian_ubuntu_init_serv_control_prog
             if [ "$dbn_ubn_serv_control_prog" = "use-insserv" ]; then
               # Use insserv
	       LC_ALL=C chroot $host/ insserv -r $default_dm &> /dev/null
	     else
               # Use update-rc.d
               LC_ALL=C chroot $host/ /usr/sbin/update-rc.d -f $default_dm remove &> /dev/null
             fi
	     if [ -e "$host/etc/init/${default_dm}.conf" ]; then
               switch_upstart_service $host/etc/init/${default_dm}.conf off
	     fi
           else
             # RH-like or SUSE
             # set the init to 3, i.e. default is text mode
             CLIENT_INIT="3"
           fi
	   if [ -e "$host/etc/inittab" ]; then
             perl -p -i -e "s/^id:[0-9]:initdefault:/id:$CLIENT_INIT:initdefault:/g" $host/etc/inittab
           fi
	   # For systemd-like
           if [ -e "$host/etc/systemd/system/default.target" ]; then
             ln -fsv /lib/systemd/system/runlevel${CLIENT_INIT}.target $host/etc/systemd/system/default.target
           fi
         done
	 echo "done!"
         #
         echo "-------------------------------------------------------"
         if [ "$drbl_mode" = "drbl_ssi_mode" ]; then
           echo "Since it's in DRBL SSI mode, and some config files are modified in template client, creating template tarball for DRBL SSI..."
           drbl-gen-ssi-files
         fi
         ;;
  "remote-memtest")
         echo -n "Setting client as remote-memtest mode..."
         stop_ocs_if_necessary
         set-default-pxe-img -i memtest -c $PXE_CONF
	 deploy_pxecfg_files
	 echo "done!"
	 ;;
  "remote-fdos")
         echo -n "Setting client as remote-fdos mode..."
         stop_ocs_if_necessary
         set-default-pxe-img -i fdos -c $PXE_CONF
	 deploy_pxecfg_files
	 echo "done!"
	 ;;
  "terminal")
         echo -n "Settinig client as DRBL terminal mode..."
         stop_ocs_if_necessary
         set-default-pxe-img -i drbl-terminal -c $PXE_CONF -l "$FULL_OS_Version $thin_client_menu_label"
	 deploy_pxecfg_files

         if [ "$LIST_HOST" = "on" ]; then
           drbl-client-system-select -e -h "$IP_LIST" on
	   drbl-powerful-thin-client -t -h "$IP_LIST" -ln $lang
         else
           drbl-client-system-select -e on
	   drbl-powerful-thin-client -t -ln $lang
         fi
	 echo "done!"
	 ;;
  "netinstall")
     netinstall_list="$(grep -Ei "^[[:space:]]*label[[:space:]]+netinstall-" $PXELINUX_DIR/default | sed -e "s/^[[:space:]]*label[[:space:]]*//g" | sort)"
     if [ -z "$MODE2" ]; then
       TMP="$(mktemp /tmp/menu.XXXXXX)"
       trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
       if [ -z "$netinstall_list" ]; then
          $DIA --title "$msg_no_network_installation_img" --clear \
          --msgbox "$msg_no_network_installation_img_des" 0 0
         exit 0
       fi
       MENU=""
       numimages=0
       for i in $netinstall_list; do
          numimages=$((numimages + 1))
          # EX for i: netinstall-ubuntu-breezy-i386
          # create the description for the netinstall image
          des="$(echo $i | sed -e "s/^netinstall-//gi" | sed -e "s/-/_/g")"
          des="${des}_$(rep_whspc_w_udrsc "$msg_install_via_network")"
          # NOTE! The extra space in the end is a must!
          MENU="$MENU $i $des "
       done
       if [ $numimages -gt 0 ]; then
         if [ $numimages -lt $MAX_DIALOG_HEIGHT ]; then
           height=$numimages
         else
           height="$MAX_DIALOG_HEIGHT"
         fi
         $DIA \
         --backtitle "$msg_nchc_title" \
         --title "$msg_netinstall" \
         --menu "$msg_choose_netinstall_imag" 0 80 $height \
         $MENU 2> $TMP
         OS_netinstall="$(cat $TMP)"
       fi
       [ -f "$TMP" ] && rm -f $TMP
     else
         if [ -n "$(echo $netinstall_list | grep -Ew "$MODE2")" ]; then
           # only if MODE2 containing netinstall and the image block exists in pxelinux.cfg/default.
           OS_netinstall="$MODE2"
         else
           [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
           echo "netinstall \"$MODE2\" is not found in $PXELINUX_DIR/default!"
           [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
	   echo "Available netinstall are: `echo $netinstall_list`" # make it show in one line
           echo "$msg_program_stop!"
           exit 1
         fi
     fi
     [ -z "$OS_netinstall" ] && echo "No distribution is selected! Program terminated!!!" && exit 1
     echo "This network installation is for: $OS_netinstall"
     echo "Setting client to the mode for installing this distribution via network..."
     stop_ocs_if_necessary
     echo -n "Set the PXE environment..."
     set-default-pxe-img -i $OS_netinstall -c $PXE_CONF
     echo "done!"
     deploy_pxecfg_files
     ;;
  "clonezilla-start")
     [ -z "$ocs_user_mode" ] && ask_if_beginner_or_expert_mode
     if [ -z "$MODE2" ]; then
       TMP=$(mktemp /tmp/menu.XXXXXX)
       trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
       $DIA \
       --backtitle "$msg_nchc_title" \
       --title "$msg_start_clonezilla_mode" \
       --menu "$msg_clonezilla_is_free_and_no_warranty\n$msg_choose_mode:" 0 0 0 \
       "save-disk" "$msg_clonezilla_save_disk" \
       "save-parts" "$msg_clonezilla_save_parts" \
       "restore-disk" "$msg_clonezilla_restore_disk" \
       "restore-parts" "$msg_clonezilla_restore_parts" \
       "select-in-client" "$msg_clonezilla_selec_in_client" \
       2> $TMP
       ocs_mode=$(cat $TMP)
       [ -f "$TMP" ] && rm -f $TMP
     else
       ocs_mode="$MODE2"
     fi
     # ocs_mode_prompt is to be shown in the title of dialog menu later
     ocs_mode_prompt="$ocs_mode"
     [ -z "$ocs_mode" ] && echo "No clonezilla mode is selected! Program terminated!!!" && exit 1
     echo "Now the clonezilla mode is: $ocs_mode"
     case "$ocs_mode" in
       # keep clonezilla-* for backword compatible
       "clonezilla-save-disk"|"save-disk")
          do_clonezilla_save_dev disk
          ;;
       "clonezilla-restore-disk"|"restore-disk")
          do_clonezilla_restore_dev disk
          ;;
       "clonezilla-save-parts"|"save-parts")
          do_clonezilla_save_dev parts
          ;;
       "clonezilla-restore-parts"|"restore-parts")
          do_clonezilla_restore_dev parts
          ;;
       "select-in-client")
          do_clonezilla_select_in_client
          ;;
     esac
     ;;

  "clonezilla-stop")
     echo -n "Trying to stop the clonezilla mode..."
     stop_ocs_if_necessary
     # When clonezilla stops, we should make clients boot locally
     set-default-pxe-img -i local -c $PXE_CONF
     deploy_pxecfg_files
     echo "done!"
     ;;

  "local")
         echo -n "Setting client as local mode..."
         stop_ocs_if_necessary
         set-default-pxe-img -i local -c $PXE_CONF
	 deploy_pxecfg_files
	 echo "done!"
	 ;;
  "reboot")
         echo "Rebooting clients if they are up and running... 3 types of clients are possible..."
	 echo "(1) For DRBL clients... (Commands run in background)"
         if [ "$LIST_HOST" = "on" ]; then
	   drbl-doit -b -u root -h "$IP_LIST" reboot &
         else
	   drbl-doit -b -u root reboot &
	 fi
	 echo "(2) For Cygwin clients... (Commands run in background)"
         if [ "$LIST_HOST" = "on" ]; then
	   drbl-doit -b -u $MSWIN_ADMIN_ID -h "$IP_LIST" /usr/bin/shutdown -f -r now &
         else
	   drbl-doit -b -u $MSWIN_ADMIN_ID /usr/bin/shutdown -f -r now &
	 fi
	 echo "(3) For Clonezilla live clients of Clonezilla SE... (Commands run in background)"
         if [ "$LIST_HOST" = "on" ]; then
	   drbl-doit -b -u $ocs_live_username -p $ocs_live_passwd -h "$IP_LIST" sudo reboot &
         else
	   drbl-doit -b -u $ocs_live_username -p $ocs_live_passwd sudo reboot &
	 fi
	 ;;
  "shutdown")
         echo "Shutdowning clients if they are up and running... 3 types of clients are possible..."
	 echo "(1) For DRBL clients... (Commands run in background)"
         if [ "$LIST_HOST" = "on" ]; then
	   drbl-doit -b -u root -h "$IP_LIST" poweroff &
         else
	   drbl-doit -b -u root poweroff &
         fi
	 echo "(2) For Cygwin clients... (Commands run in background)"
         if [ "$LIST_HOST" = "on" ]; then
	   drbl-doit -b -u $MSWIN_ADMIN_ID -h "$IP_LIST" /usr/bin/shutdown -f -s -x now &
         else
	   drbl-doit -b -u $MSWIN_ADMIN_ID /usr/bin/shutdown -f -s -x now &
         fi
	 echo "(3) For Clonezilla live clients of Clonezilla SE... (Commands run in background)"
         if [ "$LIST_HOST" = "on" ]; then
	   drbl-doit -b -u $ocs_live_username -p $ocs_live_passwd -h "$IP_LIST" sudo poweroff &
         else
	   drbl-doit -b -u $ocs_live_username -p $ocs_live_passwd sudo poweroff &
	 fi
	 ;;
  "Wake-on-LAN")
         echo "Turn on DRBL clients by Wake-on-LAN now..."
         if [ "$LIST_HOST" = "on" ]; then
	   drbl-doit -b -h "$IP_LIST" --wol
         else
	   drbl-doit -b --wol
         fi
	 echo "done!"
	 ;;
  "more")
         if [ -z "$MODE2" ]; then
           TMP="$(mktemp /tmp/menu.XXXXXX)"
           trap "[ -f "$TMP" ] && rm -f $TMP" HUP INT QUIT TERM EXIT
           $DIA \
           --backtitle "$msg_nchc_title" \
           --title "$msg_nchc_drbl" \
           --menu "$msg_switch_client_mode:" 0 0 0 \
           "switch-pxe-menu" "$msg_switch_pxe_menu" \
           "switch-pxe-bg-mode" "$msg_switch_pxe_bg_mode" \
           "drbl-mode" "$msg_drbl_mode_switch" \
           "clonezilla-mode" "$msg_clonezilla_mode_switch" \
	   "gen-template-files" "$msg_gen_template_files" \
           $login_switch_1 $login_switch_2 \
	   $client_reautologin_1 $client_reautologin_2 \
	   $clean_autologin_account_1 $clean_autologin_account_2 \
	   $reset_autologin_account_1 $reset_autologin_account_2 \
           "switch-drbl-serv" "$msg_switch_drbl_service" \
           "re-deploy" "$msg_re_deploy" \
           "clean-dhcpd-lease" "$msg_clean_dhcpd_lease" \
           "gen_3N_conf" "$msg_regenerate_nfs_nis_nat_config" \
           2> $TMP
           OTHER_MODE=$(cat $TMP)
           [ -f "$TMP" ] && rm -f $TMP
         else
           OTHER_MODE=$MODE2
	 fi
	 case "$OTHER_MODE" in
          "switch-pxe-menu")
              echo "Switch DRBL client menus..."
       	      switch-pxe-menu -c $PXE_CONF -l $lang $DIA_OPT $MORE_OPT_for_MODE2
       	      rc=$?
       	      [ "$rc" -eq 0 ] && deploy_pxecfg_files
       	      ;;
          "switch-pxe-bg-mode")
	      run-switch-pxe-bg-mode $MORE_OPT_for_MODE2 ;;
          "drbl-mode")
              run_drbl_mode_switch $MORE_OPT_for_MODE2 ;;
          "clonezilla-mode")
              run_clonezilla_mode_switch $MORE_OPT_for_MODE2 ;;
	  "gen-template-files")
              drbl-gen-ssi-files $MORE_OPT_for_MODE2 ;;
          "client-reautologin")
              if [ "$LIST_HOST" = "on" ]; then
                drbl-client-reautologin -h "$IP_LIST"
              else
                drbl-client-reautologin
              fi
              ;;
          "clean-autologin-account")
              drbl-clean-autologin-account -l $lang ;;
          "reset-autologin-account")
              drbl-user-env-reset -l $lang --auto-login ;;
          "switch-drbl-serv")
              run_switch_drbl_service $MORE_OPT_for_MODE2 ;;
          "re-deploy")
              if [ ! -f "$drbl_syscfg/drblpush.conf" ]; then
                [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
                echo "Previously saved config file $drbl_syscfg/drblpush.conf is NOT found. Did you run \"drblpush -i\" before ?"
                echo "Program Terminated!!!"
                [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
                exit 1
              fi
              drblpush --ln $lang -c $drbl_syscfg/drblpush.conf
              ;;
          "clean-dhcpd-lease")
	      drbl-clean-dhcpd-leases ;;
          "gen_3N_conf")
	      drbl-3n-conf generate ;;
          "login-switch")
              run_login_switch $MORE_OPT_for_MODE2;;
	 esac
	 ;;
  *)
         USAGE
	 ;;
esac
#
[ -f "$HOSTS_TMP" ] && rm -f $HOSTS_TMP

exit 0