rsync.in

function mount_ro {

  # remount backup destination as read-only

  if [ "$dest" == "local" ]; then
    if [ "$read_only" == "1" ] || [ "$read_only" == "yes" ]; then
      mount -o remount,ro $mountpoint
    fi
  fi

}

function run_fsck {

  # check partition for errors

  if [ "$dest" == "local" ]; then
    if [ "$fscheck" == "1" ] || [ "$fscheck" == "yes" ]; then
      umount $mountpoint
      if (($?)); then
        warning "Could not umount $mountpoint to run fsck"
      else
        $nice $fsck -v -y $partition >> $log
        mount $mountpoint
      fi
    fi
  fi

}

function include_vservers {

  # add vservers to included folders

  if [ "$vservers_are_available" == "yes" ]; then

    # sane permission on backup
    mkdir -p $backupdir/$VROOTDIR
    chmod 000 $backupdir/$VROOTDIR

    for candidate in $found_vservers; do
      candidate="`basename $candidate`"
      found_excluded_vserver="0"
      for excluded_vserver in $exclude_vserver; do
        if [ "$excluded_vserver" == "$candidate" ]; then
          found_excluded_vserver="1"
          break
        fi
      done
      if [ "$found_excluded_vserver" == "0" ]; then
        include="$include $VROOTDIR/$candidate"
      fi
    done
  fi

}

function start_mux {

  if [ "$multiconnection" == "yes" ]; then
    debug "Starting master ssh connection"
    $ssh_cmd -M sleep 1d &
    sleep 1
  fi

}

function end_mux {

  if [ "$multiconnection" == "yes" ]; then
    debug "Stopping master ssh connection"
    $ssh_cmd pkill sleep
  fi

}

function set_pipefail {

  # Save initial pipefail status for later restoration
  if echo "$SHELLOPTS" | grep -q ":pipefail"; then
     pipefail="-o"
  else
     pipefail="+o"
  fi

  # Ensure that a non-zero rsync exit status is caught by our handler
  set -o pipefail

}

function restore_pipefail {

  if [ ! -z "$pipefail" ]; then
    set $pipefail pipefail
  fi

}

function check_rsync_exit_status {

  if [ -z "$1" ]; then
    return
  fi

  case $1 in
    0)
       return
       ;;
    1|2|3|4|5|6|10|11|12|13|14|21)
       fatal "Rsync error $1 when trying to transfer $SECTION"
       ;;
    *)
       warning "Rsync error $1 when trying to transfer $SECTION"
       ;;
  esac

}

# the backup procedure

eval_config
set_rsync_options
start_mux
stop_services
mount_rw

starttime="`date +%c%n%s`"
echo "Starting backup at `echo "$starttime" | head -n 1`" >> $log

for SECTION in $include; do

  prepare_storage
  set_orig
  set_batch_mode
  set_filelist
  set_dest

  info "Syncing $SECTION on $dest_path..."
  debug $nice $rsync ${rsync_options[@]} $filelist_flag $excludes $batch_option $orig $dest_path
  set_pipefail
  $nice su -c "$rsync ${rsync_options[@]} --delete-excluded $filelist_flag $excludes $batch_option $orig $dest_path" | tee -a $log

  check_rsync_exit_status $?
  restore_pipefail
  update_metadata

done

mount_ro
run_fsck
start_services
end_mux

echo "Finnishing backup at `date`" >> $log