3 # Perform incremental backups using rsync and hardlinks.
5 # Thanks to http://www.sanitarium.net/golug/rsync_backups_2010.html for the
8 # Copyright (C) 2011-2014 Simon Ruderich
10 # This program is free software: you can redistribute it and/or modify
11 # it under the terms of the GNU General Public License as published by
12 # the Free Software Foundation, either version 3 of the License, or
13 # (at your option) any later version.
15 # This program is distributed in the hope that it will be useful,
16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 # GNU General Public License for more details.
20 # You should have received a copy of the GNU General Public License
21 # along with this program. If not, see <http://www.gnu.org/licenses/>.
26 if test "$#" -lt 2; then
27 echo "Usage: $0 <backups-directory> <arguments to rsync>" >&2
29 echo "Note: The target directory is the _first_ argument!" >&2
37 # Get absolute path to last backup directory.
40 test -d "$x" || continue
41 dest="../$x" # relative to destination directory
44 target=backup-`date '+%Y-%m-%d-%H-%M-%S'`
46 if test -d current; then
47 echo "Target directory 'current' already exists, aborting." >&2
53 --verbose --itemize-changes --human-readable \
54 --archive --hard-links --sparse --numeric-ids --one-file-system \
58 # Try to remove "current" without changing the exit code. In case the
59 # connection failed without transferring any files, we want the next
60 # backup to be able to run.
62 rmdir current 2>/dev/null || true