iankelling.org Git - distro-setup/blob - mail-backup-clean

   1 #!/bin/bash
   2 # Copyright (C) 2016 Ian Kelling
   3 #
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7 #
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9 #
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15
  16 if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
  17 shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
  18 set -eE -o pipefail
  19 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
  20
  21 ## This would delete backups that we already have in snapshots,
  22 ## 1 second granularity, so we could have some duplicates. However,
  23 ## this doesn't account for files received then accidentally deleted,
  24 ## all in between two snapshots, so they aren't in any snapshot.
  25 ## So, instead, just keep a bunch of backups based on time.
  26
  27 # cd /mnt/o/btrbk
  28 # tmp=(o*)
  29 # last_snap_date=${tmp[-1]#o.}
  30 # time=$(( $(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<$last_snap_date) +%s) -1 ))
  31 # find /bu/md -type f \! -newermt @$time -delete
  32
  33 find /bu/md -type f -mtime +100 -delete