backup

   1 #!/bin/bash
   2
   3 # Copyright (c) 2007-2008 Thomas Pani <thomas.pani/at/gmail.com>
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining a copy
   6 # of this software and associated documentation files (the "Software"), to deal
   7 # in the Software without restriction, including without limitation the rights
   8 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 # copies of the Software, and to permit persons to whom the Software is
  10 # furnished to do so, subject to the following conditions:
  11 #
  12 # The above copyright notice and this permission notice shall be included in
  13 # all copies or substantial portions of the Software.
  14 #
  15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21 # THE SOFTWARE.
  22
  23 ### EDIT THESE THREE LINES TO MATCH YOUR SETUP!!! ###
  24 # backup source
  25 SRC="/home/thomas"
  26 # backup destination
  27 # (hostname and source will be added automatically)
  28 DST="/media/PANIHDD/backup"
  29 # file containing a list of files/dirs to exclude
  30 # (see `man rsync' on --exclude-from for more info)
  31 EXCLUDES="/home/thomas/.backup_excludes"
  32 ##### DO NOT EDIT ANYTHING BELOW HERE #####
  33 ### (unless you know what you're doing) ###
  34
  35 VERSION="0.1"
  36 echo "Backup script v${VERSION}."
  37 echo
  38
  39 date=$(date "+%Y-%m-%d__%H-%M-%S")
  40 BAK_DST="${DST}/${HOSTNAME}/${SRC//\//_}"
  41
  42 # make sure we're running as root
  43 if [ $(id -u) != 0 ] ; then
  44         echo "Sorry, must be root.  Exiting..."
  45         exit 1
  46 fi
  47
  48 # make sure backup destination is mounted
  49 if [ ! -d $DST ] ; then
  50         echo "Please mount backup media. Exiting..."
  51         exit 1
  52 fi
  53
  54 # create backup dir
  55 if [ ! -d $BAK_DST ] ; then
  56         mkdir -p $BAK_DST
  57 fi
  58
  59 # list changes
  60 echo "Here's a list of changes:"
  61 echo
  62 RSYNC_OUTPUT=$(rsync -n -a -i -x -P --delete --delete-excluded --exclude-from="$EXCLUDES" --link-dest=${BAK_DST}/current/ ${SRC}/  ${BAK_DST}/backup-${date} | grep -v ^cd)
  63 if [ $(echo "$RSYNC_OUTPUT" | wc -l ${TMPFILE} | cut -d ' ' -f1) -gt 22 ] ; then
  64         echo "$RSYNC_OUTPUT" | less
  65 else
  66         echo "$RSYNC_OUTPUT"
  67 fi
  68
  69 echo
  70 echo -n "Would you like to sync these changes? [y/n] "
  71 read answer
  72
  73 case $answer in
  74         'y' ) echo ;;
  75         'n' ) echo "Exiting..." ; exit ;;
  76         *   ) echo "Invalid answer. Exiting..." ; exit 1 ;;
  77 esac
  78
  79 # rsync
  80 rsync -a -i -x -P --delete --delete-excluded --exclude-from="$EXCLUDES" --link-dest=${BAK_DST}/current/ ${SRC}/  ${BAK_DST}/backup-${date} | grep -v ^cd
  81 if [ $? -ne 0 ] ; then
  82         echo "Error during rsync. Exiting..."
  83         exit 1
  84 fi
  85
  86 # safe link to current backup
  87 if [ -L ${BAK_DST}/current ] ; then
  88         rm ${BAK_DST}/current
  89 fi
  90 ln -s backup-${date} ${BAK_DST}/current
  91
  92 # horray!
  93 echo
  94 echo "Finished backup to ${BAK_DST}"
  95 echo
  96 du -sch $BAK_DST/*