/usr/sbin/ocs-update-syslinux

#!/bin/bash
# License: GPL 
# Author: Steven Shiau <steven _at_ nchc org tw>
# Description: Program to update the syslinux partition, including the file ldlinux.sys and the files (*.c32 and *.bin) in the dir syslinux.

#
DRBL_SCRIPT_PATH="${DRBL_SCRIPT_PATH:-/usr/share/drbl}"
. $DRBL_SCRIPT_PATH/sbin/drbl-conf-functions
. /etc/drbl/drbl-ocs.conf
. $DRBL_SCRIPT_PATH/sbin/ocs-functions

# Settings
syslinux_lib_path="/usr/lib/syslinux"

#
USAGE() {
    echo "$ocs - To update the syslinux partition, including the file ldlinux.sys and the files (*.c32 and *.bin) in the dir syslinux"
    echo "Usage:"
    echo "To run $ocs:"
    echo "$ocs [OPTION] [PARTITION]"
    echo "Options:"
    echo "-f, --force   Force to update the *.c32 and *.bin files even if the syslinux version on the PARTITION is the same version with syslinux on this running operating system."
    echo "-b, --batch   Run program in batch mode, i.e. without any prompt or wait for pressing enter key."
    echo "PARTITION is the FAT partition device name, e.g. sda1, sdb1..."
    echo "Ex:"
    echo "To update the syslinux partition /dev/sdg1, run:"
    echo "   $ocs sdg1"
    echo
} # end of USAGE
#
update_syslinux_and_c32_bin(){
  # For syslinux partition, there must be:
  # (1) A FAT partition
  # (2) A file "ldlinux.sys" exists
  # (3) A dir /syslinux/ exists  
  local syslinux_dev rc systmpd file_name fs_
  syslinux_dev="/dev/$1"   # e.g. /dev/sdg1
  systmpd="$(mktemp -d /tmp/syslinux_tmp.XXXXXX)"

  # (1) Check if FAT partition
  fs_="$(LC_ALL=C ocs-get-part-info $syslinux_dev filesystem)"
  if [ -z "$(echo $fs_ | grep -i "fat" )" ]; then
    echo "Device $syslinux_dev is not a FAT partition."
    echo "Skip updating syslinux on that."
    [ -d "$systmpd" -a -n "$systmpd" ] && rmdir $systmpd
    return 1
  fi

  # (2) If ldlinux.sys exists
  if mount $syslinux_dev $systmpd; then
    if [ -e "$systmpd/ldlinux.sys" ]; then
      echo "Found syslinux partition $syslinux_dev."
      if [ "$batch_mode" = "false" ]; then
        [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
        echo "The next step is to update syslinux ldlinux.sys and other released files on this device: $syslinux_dev"
        [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
	confirm_continue_or_not_default_quit
      fi
      DEV_SYSLINUX_VER="$(LC_ALL=C strings $systmpd/ldlinux.sys | grep -iE "^SYSLINUX.*[[:digit:]]+" | awk -F" " '{print $2}' | sort | uniq)"
      # The output of command: "syslinux --version" is like:
      # syslinux 4.04  Copyright 1994-2011 H. Peter Anvin et al
      SYS_SYSLINUX_VER="$(LC_ALL=C syslinux --version 2>&1 | grep -iE "^SYSLINUX.*[[:digit:]]+" | awk -F" " '{print $2}')"
      if [ "$DEV_SYSLINUX_VER" != "$SYS_SYSLINUX_VER" -o "$force_update" = "true" ]; then
        echo "Updating the syslinux-related files on $syslinux_dev..."
        # Will update files _ONLY ALL_ the related file exist, otherwise it might mismatch.
        # Two cases for the dir containing syslinux files, (1) /  (2) /syslinux/
        cand_dir="/ /syslinux"
        for idir in $cand_dir; do
          sl_f_2_be_upd=""
          sl_f_2_fnd_on_system=""
          to_update_flag=""  
          echo "Searching syslinux related files in $systmpd/$idir/..."
          for i in $systmpd/$idir/{*.bin,*.c32,*.com,memdisk}; do
            [ ! -e "$i" ] && continue   # Skip like "*.c32" name, but no file exists
            file_name="$(basename $i)"
            sl_f_2_be_upd="$sl_f_2_be_upd $file_name"
            if [ -e "$syslinux_lib_path/$file_name" ]; then
              sl_f_2_fnd_on_system="$sl_f_2_fnd_on_system $file_name"
            else
              to_update_flag="no" # If any one not found
            fi
          done
          if [ -n "$sl_f_2_be_upd" ]; then
            echo "Syslinux related files to be updated: $sl_f_2_be_upd"
          fi
          if [ -n "$sl_f_2_fnd_on_system" ]; then
            echo "Syslinux related files found on the system: $sl_f_2_fnd_on_system"
          fi
          if [ "$to_update_flag" != "no" -a -n "$sl_f_2_be_upd" ]; then
            to_update_flag="yes"
	  fi
          if [ "$to_update_flag" = "yes" ]; then
            # For syslinux 5, some .c32 files are required: ldlinux.c32 libcom32.c32 libutil.c32
	    for i in $sys_pxelinux_v5p_required_c32; do
             # checking if exists
              if [ -e "$syslinux_lib_path/$i" ]; then
		sl_f_2_fnd_on_system="$sl_f_2_fnd_on_system $i"
	      fi
            done

            for i in $sl_f_2_fnd_on_system; do
              if [ -e "$syslinux_lib_path/$i" ]; then
                cp -afv $syslinux_lib_path/$i $systmpd/$idir/
              fi
            done
            [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
            echo "All the syslinux related files found on the Clonezilla live, now updating those related files in $systmpd/$idir, and install the syslinux ldlinux.sys on $syslinux_dev..."
            [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
            # Before running syslinux -i, umount it first.
            umount $syslinux_dev
            sleep 1
            echo "Running \"syslinux -i $syslinux_dev\"..."
            syslinux -i $syslinux_dev
          else
             [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
             echo "Not all the syslinux related files found on the Clonezilla live, skip updating those related files. Skip updating $systmpd/$idir."
             [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
          fi
	  # sl_f_2_be_upd is not nothing, it means $idir (syslinux dir) is found, so not continuing to find the next $idir
	  [ -n "$sl_f_2_be_upd" ] && break
        done
        echo "done!"
      fi
    fi
  fi
  if mountpoint $systmpd &>/dev/null; then
    umount $systmpd
  fi
  [ -d "$systmpd" -a -n "$systmpd" ] && rmdir $systmpd
} # end of update_syslinux_and_c32_bin

####################
### Main program ###
####################

ocs_file="$0"
ocs=`basename $ocs_file`

# Default settings
batch_mode="false"
#
while [ $# -gt 0 ]; do
 case "$1" in
   -f|--force)  force_update="true"; shift;;
   -b|--batch)  batch_mode="true"; shift;;
   -*)     echo "${0}: ${1}: invalid option" >&2
           USAGE >& 2
           exit 2 ;;
   *)      break ;;
 esac
done

syslinux_part="$*"

#
check_if_root
ask_and_load_lang_set

if [ -z "$syslinux_part" ]; then
  USAGE
  exit 1
fi

for i in $syslinux_part; do
  update_syslinux_and_c32_bin $i
done
clonezilla 3.21.13-1 / usr / sbin / ocs-update-syslinux
