clonezilla 3.10.11-1 / usr / sbin / create-ocs-tmp-img

#!/bin/bash
# Author: Steven Shiau <steven _at_ nchc org tw>
# License: GPL
#
# Description: This script will create a Clonezilla image, all the partition/LV image files are linked. It is intended to be used to restore the image to other disk.

set -e
#
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
# By default this program is used to create an image with device converted. However, if what we want is to duplicate an image, no need to convert the device.
cvt_dev="yes"

# Ex.:
# disk                      -> copied
# etch-home.reiserfs-img.aa -> soft linked
# etch-root.reiserfs-img.aa -> soft linked
# hda1.ext3-img.aa          -> soft linked
# hda-chs.sf                -> copied
# hda-mbr                   -> copied
# hda-pt.parted             -> copied
# hda-pt.sf                 -> copied
# lvm_etch.conf             -> copied
# lvm_logv.list             -> copied
# lvm_vg_dev.list           -> copied
# parts                     -> copied
# swappt-etch-swap_1.info   -> copied
#
# How ? First parse parts and lvm_logv.list, find the partition/LV image, link them. For the rest, copy them.

#
USAGE() {
    echo This script will create a Clonezilla image based on an existing image in $ocsroot, all the partition or LV image files are linked, not copied. It is intended to be used to restore the image to other disk.
    echo "Usage:"
    echo "$0 [OPTION] EXISTING_IMAGE NEW_IMAGE ORIGINAL_DEV NEW_DEV   To create a new image NEW_IMAGE based on existing image EXISTING_IMAGE, the original dev is ORIGINAL_DEV, the new one is NEW_DEV"
    echo "OPTION:"
    echo "-n, --no-cvt-dev  Do not convert the device name. This option is used to create a duplicated image only."
    echo "-t, --target-dir  DIR  Assign the created image will be put in DIR. If not assigned, the created image will be in /tmp."
    echo "Ex: To convert the \"image\" as \"image-cvt\", with device \"sda\" is changed to \"sdb\", run:"
    echo "    $0 image image-cnvt sda sdb"
    echo "Ex: To duplicate the \"image\" as \"image-pixz\", without changing any device name, run:"
    echo "    $0 -n image image-pixz"
}

#
while [ $# -gt 0 ]; do
  case "$1" in
    -n|--no-cvt-dev)
            shift; 
            cvt_dev="no"
            ;;
    -t|--target-dir)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
	      new_imghome="$1"
              shift
            fi
	    ;;
    -*)     echo "${0}: ${1}: invalid option" >&2
            USAGE >& 2
            exit 2 ;;
    *)      break ;;
  esac
done

imgname="$1"
new_imgname="$2"
src_dev="$3"
tgt_dev="$4"

if [ -z "$imgname" ]; then
  echo "No EXISTING_IMAGE!"
  echo "Program terminated!"
  USAGE
  exit 1
fi

if [ -z "$new_imgname" ]; then
  echo "No NEW_IMAGE!"
  echo "Program terminated!"
  USAGE
  exit 1
fi

# Only check source and destination device name when this program is used to create an image with device converted.
if [ "$cvt_dev" = "yes" ]; then
  if [ -z "$src_dev" ]; then
    echo "No ORIGINAL_DEV!"
    echo "Program terminated!"
    USAGE
    exit 1
  fi
  
  if [ -z "$tgt_dev" ]; then
    echo "No NEW_DEV!"
    echo "Program terminated!"
    USAGE
    exit 1
  fi
fi

# We put the new image in /tmp, since we need a filesystem can be symbolic linked. Otherwise it will fail, like CD (readonly) or samba server (FAT does not support symbolic link)
[ -z "$new_imghome" ] && new_imghome="/tmp"
# If the new image dir exists, only when the tag file converted-not-portable inside that we remove all the files. Otherwise it might happen to be the same dir name.
if [ -d "$new_imghome/$new_imgname" -a -n "$new_imgname" -a \
     -e "$new_imghome/$new_imgname/converted-not-portable" ]; then
  rm -f $new_imghome/$new_imgname/*
fi
mkdir -p $new_imghome/$new_imgname

echo "Creating a temporary image based on image $imgname..."
# Find the file to be linked, not be copied.

# Part 1: normal partition (hda1, sda1...)
PARTIMG_LIST_TMP="$(cat $ocsroot/$imgname/parts)"
pt_found=""
for i in $PARTIMG_LIST_TMP; do
  if [ -z "$(unalias ls 2>/dev/null; ls $ocsroot/$imgname/$(to_filename $i)* 2>/dev/null)" ]; then
    echo "$ocsroot/$imgname/$i* was not found! Skip this!"
    continue
  else
    pt_found="$(unalias ls 2>/dev/null; ls $ocsroot/$imgname/*$(to_filename $i)* 2>/dev/null | while read x; do basename $x; done | sort)"
  fi
  PARTIMG_LIST="$PARTIMG_LIST $pt_found"
done

# Part 2: LV
LV_LIST=""
LOGV_PARSE_CONF="$ocsroot/$imgname/lvm_logv.list"
if [ -e "$LOGV_PARSE_CONF" ]; then
  exec 3< $LOGV_PARSE_CONF
  while read -u 3 lv fs; do
    echo "lv fs: $lv $fs"
    # Find the real data partition
    # Ex:
    # /dev/vg3/lvol0  Linux rev 1.0 ext3 filesystem data (large files)
    fn_found=""
    fn="$(echo $lv | sed -e "s|^/dev/||" -e "s|/|-|g")"
    if [ -z "$(unalias ls 2>/dev/null; ls $ocsroot/$imgname/*$fn* 2>/dev/null)" ]; then
      echo "$ocsroot/$imgname/$fn* was not found! Skip this!"
      continue
    else
      fn_found="$(unalias ls 2>/dev/null; ls $ocsroot/$imgname/*$fn* 2>/dev/null | while read x; do basename $x; done | sort)"
    fi
    # For swap partition, skip
    case "$fs" in 
      *[Ss][Ww][Aa][Pp]*) continue ;;
    esac
    LV_LIST="$LV_LIST $fn_found"
  done
  exec 3<&-
fi

# Softlink them
for i in $PARTIMG_LIST $LV_LIST; do
  ( 
    cd $new_imghome/$new_imgname || exit 1
    ln -fs $ocsroot/$imgname/$i .
  )
done

# Copy the others
( 
  cd $new_imghome/$new_imgname 
  for i in $ocsroot/$imgname/*; do
    j="$(basename $i)"
    if [ -z "$(echo $PARTIMG_LIST $LV_LIST | grep -Ewo "$j")" ]; then
    cp -a $ocsroot/$imgname/$j .
  fi
  done
)

#
if [ "$cvt_dev" = "yes" ]; then
  # Put a tag file
  echo "This image was converted by $0 and it is not portable." > $new_imghome/$new_imgname/converted-not-portable
  #
  cnvt-ocs-dev -b -d $new_imghome $new_imgname $src_dev $tgt_dev
fi
echo "The created image is \"$new_imghome/$new_imgname\"."