clonezilla 3.27.16-2 / usr / sbin / ocs-live-bind-mount

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/usr/sbin/ocs-live-bind-mount is in clonezilla 3.27.16-2.

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The actual contents of the file can be viewed below. 

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#!/bin/bash
# License: GPL 
# Author: Aaron Burling <aaron_burling _at_ lkstevens wednet edu; burlingaaron _at_ gmail com> and Steven Shiau <steven _at_ clonezilla org>
# Description: Program to browse and bind mount the image repository.

#
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
ask_and_load_lang_set $specified_lang

# Functions
is_ocs_bind_mount() {
  local dir_test="$1"
  local rc=1
  local mnt_src
  # For local disk mount: (the key is "[" in the source)
  # root@debian:~# findmnt -D
  # SOURCE             FSTYPE     SIZE   USED  AVAIL USE% TARGET
  # /dev/sdf1          reiserfs   500G  40.2G 459.8G   8% /tmp/ocsroot_bind_root
  # /dev/sdf1[/level2] reiserfs   500G  40.2G 459.8G   8% /home/partimag

  # For NFS mount: (there is no "[" in the source, and there is no any "bind" in the mount options)
  # root@debian:~# findmnt -D
  # SOURCE                                 FSTYPE     SIZE   USED  AVAIL USE% TARGET
  # 192.168.120.254:/home/partimag/        nfs        1.7T 705.9G 974.5G  40% /tmp/ocsroot_bind_root
  # 192.168.120.254:/home/partimag/level2  nfs        1.7T 705.9G 974.5G  40% /home/partimag
  if [ -n "$(findmnt -nD --target $dir_test | \
             awk -F" " '{print $1}' | grep -E "\[")" ]; then
     rc=0
  else
     mnt_src_dir_test="$(findmnt -nD --target $dir_test | awk -F" " '{print $1}')"
     mnt_src_pre="$(findmnt -nD --target $pre_ocsroot_path | awk -F" " '{print $1}')"
     if [ "$(echo "$mnt_src_dir_test" | grep -E "$mnt_src_pre")" ]; then
       # $mnt_src_dir_test is the subdir of $mnt_src_pre -> bind mounted.
       rc=0
     fi
  fi
  return $rc
} # end of  is_ocs_bind_mount
#
ask_if_bind_mount_again() {
  $DIA --backtitle "$msg_nchc_free_software_labs" --title "$msg_nchc_clonezilla" \
  --yesno "$msg_do_u_want_to_do_it_again" 0 0 
  ans_="$?"
  case "$ans_" in
    0) # yes is chosen
       ASK_DIRNAME=1;;
    1) # no is chosen
       # Revert the original mount point.
       if [ "$unmount_flag" = "yes" ]; then
         mount --bind $saved_bind_ocsroot_src $ocsroot
       fi
       if [ "$move_flag" = "yes" ]; then
         mount --make-private "$(dirname $pre_ocsroot_path)"
         mount --move $pre_ocsroot_path $ocsroot
       fi
       echo "$msg_program_stop!"
       [ -f "$sel_dir" -a -n "$sel_dir" ] &&  rm -f $sel_dir
       exit 1;;
  esac
} # end of ask_if_bind_mount_again

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

check_if_root
ask_and_load_lang_set

# check DIA
check_DIA_set_ESC $DIA

move_flag="no"
unmount_flag="no"
saved_bind_ocsroot_src=""
if ! mountpoint $ocsroot 2>&1 >/dev/null; then
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo "$msg_this_directory_is_not_mountpoint: $ocsroot"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo "$msg_there_is_no_way_to_mount_subdirectory"
  echo "$msg_program_stop"  | tee --append ${OCS_LOGFILE}
  exit 1
fi

# Prepare the temporary mount point.
mkdir -p $pre_ocsroot_path

# If it's bind device, umount it first
if is_ocs_bind_mount $ocsroot; then
  # Bind mounted mode.
  # Saved the bind mounted source

  # For NFS mount:
  # root@debian:~# findmnt -D
  # SOURCE                                 FSTYPE     SIZE   USED  AVAIL USE% TARGET
  # 192.168.120.254:/home/partimag/        nfs        1.7T 705.9G 974.5G  40% /tmp/ocsroot_bind_root
  # 192.168.120.254:/home/partimag/level2  nfs        1.7T 705.9G 974.5G  40% /home/partimag
  
  # For local device mount:
  # /dev/sdf1          reiserfs   500G  40.2G 459.8G   8% /tmp/ocsroot_bind_root
  # /dev/sdf1[/level2] reiserfs   500G  40.2G 459.8G   8% /home/partimag

  # //NOTE// For local device, "[" and "]" are only shown as identification for bind mount,
  # but they are not part of path. Therefore we have to strip them for the saved path.

  saved_bind_ocsroot_src="$(findmnt -nD -o SOURCE --target $ocsroot | sed -r -e "s|\[||g" -e "s|\]||g")"
  saved_bind_pre_src="$(findmnt -nD -o SOURCE --target $pre_ocsroot_path | sed -r -e "s|\[||g" -e "s|\]||g")"
  saved_bind_pre_tgt="$(findmnt -nD -o TARGET --target $pre_ocsroot_path)"
  # The saved_bind_ocsroot_src should use the target path, not the source. Otherwise like NFS source, it will become
  # mount --bind 192.168.120.254:/home/partimag/level2 /home/partimag
  # mount: special device 192.168.120.254:/home/partimag/level2 does not exist
  # We want to make it as:
  # mount --bind /tmp/ocsroot_bind_root/level2 /home/partimag
  # Therefore change "192.168.120.254:/home/partimag/level2" as "/tmp/ocsroot_bind_root/level2"
  # For local device, e.g. /tmp/ocsroot_bind_root[/level2] (extra [ and ] are shown, however, it's not part of path)
  saved_bind_ocsroot_src="$(echo $saved_bind_ocsroot_src | sed -r -e "s|$saved_bind_pre_src|$saved_bind_pre_tgt|g")"
  echo "$ocsroot is a bind mounted device. Unmount it first."
  umount $ocsroot
  rc=$?
  if [ "$rc" -eq 0 ]; then
    unmount_flag="yes"
  fi
else 
  # Native mode, not bind mounted.
  mount --make-private /
  mount --move $ocsroot $pre_ocsroot_path
  rc=$?
  if [ "$rc" -eq 0 ]; then
    move_flag="yes"
  fi
fi
sel_dir="$(mktemp /tmp/sel_dir.XXXXXX)"
ASK_DIRNAME=1
while [ "$ASK_DIRNAME" -ne 0 ]; do
  BrowseCurrentDirectory "$pre_ocsroot_path" $sel_dir
  real_ocsroot="$(cat $sel_dir)"
  if [ -n "$real_ocsroot" -a -d "$real_ocsroot" ]; then
    if [ ! -e "$real_ocsroot/clonezilla-img" ]; then
      cmd="mount --bind -o $ocsroot_def_mnt_opt,nodiratime $real_ocsroot $ocsroot"
      echo "Running: $cmd"
      eval $cmd
      ASK_DIRNAME=0
    else
      [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
      echo "$msg_the_dir_you_choose_is_clonezilla_img_dir: $real_ocsroot"
      echo "$msg_there_is_no_way_to_mount_subdirectory"
      [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
      read -p "$msg_press_enter_to_continue..."
      ask_if_bind_mount_again
    fi
  else
    ask_if_bind_mount_again
  fi
done
[ -f "$sel_dir" -a -n "$sel_dir" ] &&  rm -f $sel_dir

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