cjones/restic-automatic-backup-scheduler
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Run shellcheck on all shellscripts

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This commit is contained in:
Erik Westrup
2022-02-01 17:15:47 +01:00
parent 79d13a1e64
commit 9b7db6d999
4 changed files with 30 additions and 30 deletions
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2
usr/local/sbin/cron_mail
View File

@@ -15,7 +15,7 @@ if [ $# -eq 0 ]; then
echo "No program to run given!" >&2
exit 1
fi
cmd="$@"
cmd="$*"
body=$(eval "$cmd" 2>&1)

34
usr/local/sbin/restic_backup.sh
View File

@@ -15,11 +15,11 @@ set -euo pipefail
# Assert that all needed environment variables are set.
# TODO in future if this grows, move this to a restic_lib.sh
assert_envvars() {
local varnames=($@)
local varnames=("$@")
for varname in "${varnames[@]}"; do
# Check if variable is set, then if it is not empty (need to do both as of `set -u`).
if [ -z ${!varname+x} ] || [ -z ${!varname} ] ; then
printf "%s must be set with a value for this script to work.\n\nDid you forget to source a /etc/restic/*.env profile in the current shell before executing this script?\n" $varname >&2
if [ -z ${!varname+x} ] || [ -z "${!varname}" ] ; then
printf "%s must be set with a value for this script to work.\n\nDid you forget to source a /etc/restic/*.env profile in the current shell before executing this script?\n" "$varname" >&2
exit 1
fi
done
@@ -48,7 +48,7 @@ trap exit_hook INT TERM
exclusion_args="--exclude-file ${RESTIC_BACKUP_EXCLUDE_FILE}"
## Self-contained backup files per backup path. E.g. having an USB disk at /mnt/media in RESTIC_BACKUP_PATHS,
# a file /mnt/media/.backup_exclude.txt will automatically be detected and used:
for backup_path in ${RESTIC_BACKUP_PATHS[@]}; do
for backup_path in "${RESTIC_BACKUP_PATHS[@]}"; do
if [ -f "$backup_path/.backup_exclude.txt" ]; then
exclusion_args+=" --exclude-file $backup_path/.backup_exclude.txt"
fi
@@ -68,28 +68,28 @@ wait $!
# --one-file-system makes sure we only backup exactly those mounted file systems specified in $RESTIC_BACKUP_PATHS, and thus not directories like /dev, /sys etc.
# --tag lets us reference these backups later when doing restic-forget.
restic backup \
--verbose=$RESTIC_VERBOSITY_LEVEL \
--verbose="$RESTIC_VERBOSITY_LEVEL" \
--one-file-system \
--tag $RESTIC_BACKUP_TAG \
--option b2.connections=$B2_CONNECTIONS \
$exclusion_args \
$RESTIC_BACKUP_EXTRA_ARGS \
$RESTIC_BACKUP_PATHS &
--tag "$RESTIC_BACKUP_TAG" \
--option b2.connections="$B2_CONNECTIONS" \
"$exclusion_args" \
"$RESTIC_BACKUP_EXTRA_ARGS" \
"$RESTIC_BACKUP_PATHS" &
wait $!
# Dereference and delete/prune old backups.
# See restic-forget(1) or http://restic.readthedocs.io/en/latest/060_forget.html
# --group-by only the tag and path, and not by hostname. This is because I create a B2 Bucket per host, and if this hostname accidentially change some time, there would now be multiple backup sets.
restic forget \
--verbose=$RESTIC_VERBOSITY_LEVEL \
--tag $RESTIC_BACKUP_TAG \
--option b2.connections=$B2_CONNECTIONS \
--verbose="$RESTIC_VERBOSITY_LEVEL" \
--tag "$RESTIC_BACKUP_TAG" \
--option b2.connections="$B2_CONNECTIONS" \
--prune \
--group-by "paths,tags" \
--keep-daily $RESTIC_RETENTION_DAYS \
--keep-weekly $RESTIC_RETENTION_WEEKS \
--keep-monthly $RESTIC_RETENTION_MONTHS \
--keep-yearly $RESTIC_RETENTION_YEARS &
--keep-daily "$RESTIC_RETENTION_DAYS" \
--keep-weekly "$RESTIC_RETENTION_WEEKS" \
--keep-monthly "$RESTIC_RETENTION_MONTHS" \
--keep-yearly "$RESTIC_RETENTION_YEARS" &
wait $!
# Check repository for errors.

10
usr/local/sbin/restic_check.sh
View File

@@ -7,11 +7,11 @@ set -euo pipefail
# Assert that all needed environment variables are set.
assert_envvars() {
local varnames=($@)
local varnames=("$@")
for varname in "${varnames[@]}"; do
# Check if variable is set, then if it is not empty (need to do both as of `set -u`).
if [ -z ${!varname+x} ] || [ -z ${!varname} ] ; then
printf "%s must be set with a value for this script to work.\n\nDid you forget to source a /etc/restic/*.env profile in the current shell before executing this script?\n" $varname >&2
if [ -z ${!varname+x} ] || [ -z "${!varname}" ] ; then
printf "%s must be set with a value for this script to work.\n\nDid you forget to source a /etc/restic/*.env profile in the current shell before executing this script?\n" "$varname" >&2
exit 1
fi
done
@@ -37,6 +37,6 @@ trap exit_hook INT TERM
# Check repository for errors.
restic check \
--option b2.connections=$B2_CONNECTIONS \
--verbose=$RESTIC_VERBOSITY_LEVEL &
--option b2.connections="$B2_CONNECTIONS" \
--verbose="$RESTIC_VERBOSITY_LEVEL" &
wait $!

14
usr/local/sbin/systemd-email
View File

@@ -1,4 +1,4 @@
#!/usr/bin/env sh
#!/usr/bin/env bash
# Send email notification from systemd.
# Source: https://serverfault.com/questions/876233/how-to-send-an-email-if-a-systemd-service-is-restarted
# Source: https://wiki.archlinux.org/index.php/Systemd/Timers#MAILTO
@@ -15,19 +15,19 @@
# (24 * 60 * 60) / 100 = 864 second
# One option that I used with my old Axis cameras it to use my gmx.com accunt for sending emails instead, as there are (no?) higher limits there.
MIN_WAIT_TIME_S=900
SCRIPT_NAME=$(basename $0)
SCRIPT_NAME=$(basename "$0")
LAST_RUN_FILE="/tmp/${SCRIPT_NAME}_last_run.txt"
last_touch() {
stat -c %Y $1
stat -c %Y "$1"
}
waited_long_enough() {
retval=1
if [ -e $LAST_RUN_FILE ]; then
if [ -e "$LAST_RUN_FILE" ]; then
now=$(date +%s)
last=$(last_touch $LAST_RUN_FILE)
wait_s=$(expr $now - $last)
last=$(last_touch "$LAST_RUN_FILE")
wait_s=$((now - last))
if [ "$wait_s" -gt "$MIN_WAIT_TIME_S" ]; then
retval=0
fi
@@ -35,7 +35,7 @@ waited_long_enough() {
retval=0
fi
[ $retval -eq 0 ] && touch $LAST_RUN_FILE
[ $retval -eq 0 ] && touch "$LAST_RUN_FILE"
return $retval
}