#! /bin/bash
# rsync_bak (Bash script) -- does full/incremental backups using rsync
# .rsync_bak_exclude files (anywhere in the trees) specify files/directories/
# wildcards to be excluded.  (Watch out for relative paths; they will match
# anywhere in the tree.  Start a path with "/" to anchor it to the the location
# of the .rsync_bak_exclude file.)
#
# Version: 1.8.2

syslog_facility=daemon
syslog_tag="rsync_bak[$$]"

files="/etc /home /usr/local /var/log /var/spool /var/mail /var/lib/bluetooth /var/lib/samba"
rsync_module=fomalhaut::`hostname`_backup
new_dir_name=`date +%Y%m%d`

logger -t $syslog_tag -p $syslog_facility.info backing up $files to $rsync_module

# find the name of the previous backup
# (assumes there are no other kinds of file or directory at the root of
# the module with a name that starts with a digit)
old_dir_name=`rsync $rsync_module/'[0-9]*'|awk '{ name = $5 } END { print name }' ; exit ${PIPESTATUS[0]}`
if [ $? -eq 0 ] ; then
  logger -t $syslog_tag -p $syslog_facility.debug incremental backup relative to $old_dir_name
else
  logger -t $syslog_tag -p $syslog_facility.err relative directory lookup failed
  exit 1
fi

# the main rsync invocation
# (includes options to conduct incremental backup using hard links
# and to, after the transfer, delete files that have been deleted here or
# added to the exclude list)
rsync -avS \
  --link-dest=../$old_dir_name --delete --delete-excluded --delete-after \
  --exclude='*~' --exclude=.DS_Store --exclude=.FBCLockFolder --exclude=.gvfs \
  --exclude=.ccache --exclude=.beagle --exclude=.cache \
  --exclude=.xvpics --exclude='#*#' --exclude='.*.sw?' \
  --exclude='.~lock.*#' \
  --exclude='/home/*/.mozilla/*/*/Cache*' --exclude='/home/*/.prism/*/*/Cache*' \
  --exclude='/home/*/.mozilla/*/*/*.mfasl' --exclude='/home/*/.mozilla/*/*/history.dat.old' --exclude='/home/*/.mozilla/*/*/*.bak' --exclude='/home/*/.mozilla/*/*/urlclassifier*.sqlite' \
  --exclude='/home/*/.gnome2/epiphany/mozilla/epiphany/Cache' --exclude='/home/*/.java/deployment/cache' \
  --exclude='/home/*/.kde/share/apps/kmail/dimap' \
  --exclude='/home/*/.thumbnails' --exclude='/home/*/.Trash' \
  --exclude='/home/*/.openoffice.org2/user/config/imagecache' \
  --exclude='/home/*/.openoffice.org/3/user/uno_packages' --exclude='/home/*/.openoffice.org2/user/registry/cache' \
  --exclude='/home/*/.kde/share/apps/nepomuk/repository' \
  --exclude='/home/*/.local/share/desktop-couch/.gwibber_messages_design' \
  --exclude=/etc/brltty --exclude=/etc/gconf/gconf.xml.defaults \
  --exclude='/usr/local/src' \
  --filter=":- .rsync_bak_exclude" \
  $files $rsync_module/$new_dir_name
rsync_exitcode=$?

if [ $rsync_exitcode -eq 0 ] ; then
  logger -t $syslog_tag -p $syslog_facility.notice backup complete
else
  logger -t $syslog_tag -p $syslog_facility.err backup failed with error code $rsync_exitcode
  exit 2
fi