clonezilla 3.21.13-1 / 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
# sda1.files-md5sum.info.gz -> 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 "-or, --ocsroot DIR Specify DIR (absolute path) as directory ocsroot (i.e. overwrite the ocsroot assigned in drbl.conf)"
    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 "$1" in
    -or|--ocsroot)
            # overwrite the ocsroot in drbl.conf
            shift; 
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
              ocsroot="$1"
              shift;
            fi
            [ -z "$ocsroot" ] && USAGE && exit 1
            ;;
    -n|--no-cvt-dev)
            shift; 
            cvt_dev="no"
            ;;
    -f|--from-part)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
	      from_part="$1"
              shift
            fi
	    ;;
    -d|--to-part)
            shift
            if [ -z "$(echo $1 |grep ^-.)" ]; then
              # skip the -xx option, in case 
	      to_part="$1"
              shift
            fi
	    ;;
    -t|--target-dir)
            shift
            if [ -z "$(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"

#
ask_and_load_lang_set $specified_lang

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

if [ -z "$new_imgname" ]; then
  echo "No NEW_IMAGE!"
  echo "$msg_program_stop!"
  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 "$msg_program_stop!"
    USAGE
    exit 1
  fi
  
  if [ -z "$tgt_dev" ]; then
    echo "No NEW_DEV!"
    echo "$msg_program_stop!"
    USAGE
    exit 1
  fi
fi

# By default 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)
if [ -z "$new_imghome" ]; then
  new_imghome="/tmp"
else
  # Check if the assigned new_imghome supports software link
  OCS_LN_TMP="$(mktemp $new_imghome/ocs_ln_tmp.XXXXXX)"
  if ! ln -fs ${OCS_LN_TMP} ${OCS_LN_TMP}.ln &>/dev/null; then
    [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
    echo "File system for $new_imghome does not support software link!"
    echo "You have to use a file system supporting software link for $new_imghome."
    [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
    echo "$msg_program_stop!"
    my_ocs_exit 1
  fi
  [ -L "${OCS_LN_TMP}.ln" ] && rm -f ${OCS_LN_TMP}.ln
  [ -e "$OCS_LN_TMP" ] && rm -f $OCS_LN_TMP
fi
# If the new image dir exists, only when the tag file converted-not-portable inside that we remove all the files. Otherwise it might happen to be the same dir name.
if [ -d "$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="$(get_parts_list_from_img $ocsroot/$imgname)"
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
    # Exclude the image info file like "sda1.dd-img.info" and "sda1.files-md5sum.info.gz"
    pt_found="$(unalias ls 2>/dev/null; ls $ocsroot/$imgname/*$(to_filename $i)* \
    2>/dev/null | grep -E -v "(dd-img.info$|\.info.gz$)" | 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
)

# Modify the content of checksum info, e.g. "sda1.files-md5sum.info.gz"
for i in $new_imghome/$new_imgname/*.files-*sum.info.gz; do
  [ ! -e "$i" ] && continue
  # Find the mountpoint from checksum file, then change to new one
  # The path in the checksum is like:
  # ===================================
  # f9389e7942c0b0ef918477cd0b24fdb3  /tmp/chksum_tmpd.yRFkST/root/.bash_history
  # d41d8cd98f00b204e9800998ecf8427e  /tmp/chksum_tmpd.yRFkST/root/.cache/motd.legal-displayed
  # cf277664b1771217d7006acdea006db1  /tmp/chksum_tmpd.yRFkST/root/.bashrc
  # ===================================
  # Unzip it, modify, then gzip it again.
  gunzip $i
  unzip_f="$(echo $i | sed -r -e "s/.info.gz$/.info/g")"
  sum_part_tmpd="$(LC_ALL=C head -n 1 $unzip_f | awk -F" " '{print $2}' | grep -E -o "/tmp/chksum_tmpd.[[:alnum:]]{6}")"
  new_sum_part_tmpd="$(LC_ALL=C mktemp -u -d /tmp/chksum_tmpd.XXXXXX)"
  perl -pi -e "s|$sum_part_tmpd|$new_sum_part_tmpd|g" $unzip_f
  gzip $unzip_f
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_force_opt=""
  if [ -n "$from_part" -a -n "$to_part" ]; then
    # We have to force to create the tmp image when source partition and destination partition is different.
    # The is especially for the partitions on the same disk, like the image of sda1 is restored to sda6
    cnvt_force_opt="-f"
  fi
  cnvt-ocs-dev $cnvt_force_opt -b -d $new_imghome $new_imgname $src_dev $tgt_dev
fi

if [ -n "$from_part" -a -n "$to_part" ]; then
  # Softlink them
  ( 
    cd $new_imghome/$new_imgname || exit 1
    # 1st, remove the destination partition in case it exists
    rm -f ${to_part}.*
    # sda1.ext4-ptcl-img.gz.aa -> sdb5.ext4-ptcl-img.gz.aa
    for i in $ocsroot/$imgname/${from_part}.*; do
      [ ! -e "$i" ] && continue
      fn="$(basename $i)"
      fn_new="$(echo "$fn" | sed -e "s|${from_part}\.|${to_part}\.|")"
      ln -fs "${i}" "${fn_new}"
    done
  )
fi

echo "The created image is \"$new_imghome/$new_imgname\"."