X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=ziva-backup-check;h=2a68af87dfb1769f93b060eeb6b235d342a97e40;hb=HEAD;hp=31ae7ddcf42956ffdc98723e1e6195a2270ab731;hpb=7b47d6a266340223e78317cfe0570868f45a4cad;p=distro-setup

diff --git a/ziva-backup-check b/ziva-backup-check
index 31ae7dd..2a68af8 100755
--- a/ziva-backup-check
+++ b/ziva-backup-check
@@ -1,8 +1,27 @@
 #!/bin/bash
-# Copyright (C) 2019 Ian Kelling
-# SPDX-License-Identifier: AGPL-3.0-or-later
+# I, Ian Kelling, follow the GNU license recommendations at
+# https://www.gnu.org/licenses/license-recommendations.en.html. They
+# recommend that small programs, < 300 lines, be licensed under the
+# Apache License 2.0. This file contains or is part of one or more small
+# programs. If a small program grows beyond 300 lines, I plan to switch
+# its license to GPL.
 
-source /a/bin/errhandle/err
+# Copyright 2024 Ian Kelling
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+source /a/bin/bash-bear-trap/bash-bear
 
 [[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
 
@@ -10,7 +29,7 @@ pre="${0##*/}:"
 err() { echo "[$(date +'%Y-%m-%d %H:%M:%S%z')]: $pre: $*" >&2; }
 
 ## begin check on syncthing
-if ! systemctl show --no-page syncthing@ziva | sed -n 's/^MainPID=//p' | egrep '^[0-9]+$' &>/dev/null; then
+if ! systemctl show --no-page syncthing@ziva | sed -n 's/^MainPID=//p' | grep -E '^[0-9]+$' &>/dev/null; then
   err no pid for syncthing@ziva. systemctl status:
   systemctl status syncthing@ziva
 fi
@@ -18,28 +37,35 @@ fi
 
 
 ## begin check on btrbk
-now=$(date +%s)
-age_limit_sec=$(( 60 * 60 * 50 )) # 50 hours
-for vol in {root,boot}_ubuntubionic; do
-  snaps=(/mnt/r7/amy/btrbk/${vol}.20*)
+age_limit_sec=$(( 60 * 60 * 24 * 7 )) # 7 days.
+for prefix in root boot; do
+  if [[ $prefix == boot ]]; then
+    # its not uncommon for the /boot subvol to have no changes, and thus
+    # no new backups for 10 days or so. todo: instead of this error
+    # prone check, we should make it so the ziva computer will
+    # touch a file on our computer whenever btrbk succeeds
+    age_limit_sec=$(( age_limit_sec + 60* 60 * 24 * 35 ))
+  fi
+  vol=${prefix}_ubuntubionic
+  snaps=(/mnt/r7/amy/$prefix/btrbk/${vol}.20*)
   if [[ ! ${snaps[*]} ]]; then
-    err no snapshots starting with /mnt/r7/amy/btrbk/${vol}_ubuntubionic.20
+    err no snapshots starting with /mnt/r7/amy/$prefix/btrbk/${vol}.20
     break
   fi
 
-  read last_snap_sec last_snap < <(
+  read -r last_snap_sec last_snap < <(
     for s in ${snaps[@]}; do
       f=${s##*/}
-      unix_time=$(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${f#$vol.}) +%s)
+      unix_time=$(date -d "$(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${f#"$vol".})" +%s)
       printf "%s %s\n" $unix_time $s # part of the pipeline
     done | sort -r | head -n 1 ||:
-           )
+  )
   if [[ ! $last_snap ]]; then
     # should not happen.
-    err "could not find latest snapshot for $svp among ${snaps[*]}"
+    err "could not find latest snapshot for $vol among ${snaps[*]}"
     exit 1
   fi
-  if (( last_snap_sec < now - age_limit_sec )); then
+  if (( last_snap_sec < EPOCHSECONDS - age_limit_sec )); then
     err vol $vol last backup older than 50 hours: $last_snap
   fi
 done