2 # Copyright (C) 2016 Ian Kelling
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
8 # http://www.apache.org/licenses/LICENSE-2.0
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.
18 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
21 cbase
=$HOME/sysd-mail-once-state
25 Usage: sysd-log-once [-ERRORS] SERVICE COMMAND [ARGS...]
26 For systemd timers, email on repeated failure & success after failure.
28 In the service triggered by the timer, prepend this script to the ExecStart.
29 The email will contain the service's logs for the last ERRORS runs.
32 Stores error counts in $cbase
34 -ERRORS: ERRORS is the number of failurs to accumulate before mailing the error.
47 c
=$cbase/$service # c for command file path base
50 arr
=($glob); file="${arr[0]}"; [[ $glob != "$file" ]] ||
file=
51 [[ -d $cbase ]] || mkdir
-p $cbase
53 if [[ ! $file ]]; then
54 cursor
=$
(journalctl
--show-cursor -qn0|
sed 's/^\s*--\scursor:\s*//')
63 if (( i
< errors
)); then
67 if [[ $file == $c$errors ]]; then
73 printf "%s\n" "$cursor" >$file
74 if (( errors
== 1 )); then
79 journalctl
-u $service.service
--after-cursor=$
(<$file) | \
80 mail -s "$HOSTNAME: $service exit code: $code" root
85 if [[ $file == $c$errors ]]; then
86 echo |
mail -s "$HOSTNAME: $service success" root