freeze-dir.sh

   1 #!/bin/bash
   2
   3 #########################################################################
   4 # This program is free software: you can redistribute it and/or modify  #
   5 # it under the terms of the version 3 of the GNU General Public License #
   6 # as published by the Free Software Foundation.                         #
   7 #                                                                       #
   8 # This program is distributed in the hope that it will be useful, but   #
   9 # WITHOUT ANY WARRANTY; without even the implied warranty of            #
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU      #
  11 # General Public License for more details.                              #
  12 #                                                                       #
  13 # You should have received a copy of the GNU General Public License     #
  14 # along with this program. If not, see <http://www.gnu.org/licenses/>.  #
  15 #                                                                       #
  16 # Written by and Copyright (C) Francois Fleuret                         #
  17 # Contact <francois@fleuret.org> for comments & bug reports             #
  18 #########################################################################
  19
  20 # This command makes a backup copy of a given directory into a backup
  21 # directory, tags it with the date and time, and uses rsync
  22 # intelligent features to avoid making superfluous copies of files
  23 # which are already backuped.
  24
  25 set -e
  26
  27 [[ ${FREEZE_DIR} ]] || FREEZE_DIR=${HOME}/.backups
  28
  29 if [[ ! -d ${FREEZE_DIR} ]]; then
  30     echo "Can not find directory ${FREEZE_DIR}" >&2
  31     exit 1
  32 fi
  33
  34 while [[ "$1" ]]; do
  35
  36     dir=$(basename "$1")
  37     path=$(dirname "$1")
  38     full_path="${path}/${dir}"
  39
  40     date=$(date +%Y_%b_%d_%H:%M:%S)
  41
  42     if [[ ! -d "${full_path}" ]]; then
  43         echo "Can not find directory ${full_path}" >&2
  44         exit 1
  45     fi
  46
  47     if [[ $(find "${full_path}" -type f -name "core*" -o -name "vgcore.[0-9]*") ]]; then
  48         # rm -i $(find "${full_path}" -type f -name "core" -o -name "vgcore.[0-9]*")
  49         echo "There seems to be core files in ${full_path}" >&2
  50         exit 1
  51     fi
  52
  53     backup="${FREEZE_DIR}/${full_path}"
  54
  55     mkdir -p "${FREEZE_DIR}/${path}"
  56
  57     current_backup="${backup}:::current"
  58     new_backup="${backup}:::${date}"
  59
  60     if [[ -h "${current_backup}" ]]; then
  61         rsync --link-dest="${current_backup}/" -axz "${full_path}/" "${new_backup}/"
  62         rm -f "${current_backup}"
  63     else
  64         if [[ -a ${current_backup} ]]; then
  65             echo "${current_backup} exists and is not a symbolic link" >&2
  66             exit 1
  67         else
  68             rsync -axz "${full_path}/" "${new_backup}/"
  69         fi
  70     fi
  71
  72     ln -s "${new_backup}" "${current_backup}"
  73
  74     sync
  75
  76     du -sh "${new_backup}"
  77
  78     shift
  79
  80 done