9760cd05ec
* Before, doing `$ PREFIX=/usr/local make install` would install files to`/usr/local/usr/local..` which is wrong * With this PR, files will be installed to the expected location e.g. `/usr/local/etc/restic` * `Makefile` almost completely rewritten * As e.g. `default.env` would source `_global.env`, `default.env` must be edited to find the right location of `_global.env` depending on what `$PREFIX` was set to. * see documented build stages in the `Makefile` itself. * Made sure that the rules are correct so that only modifed files are installed, not all at once unnecessarily like before. * A sub-goal was that the [PKGBUILD](https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=restic-systemd-automatic-backup#n20) for Arch should not need to do any custom install configuration, to keep everything easier to maintain. `$ make install` should work out of the box for Arch. * Additionally added the `-b` flag to `install(1)` that makes a backup of existing `etc/restic/*` files before installing a newer version. Fixes #49
62 lines
1.9 KiB
Bash
62 lines
1.9 KiB
Bash
#!/usr/bin/env bash
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# Send email notification from systemd.
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# Source: https://serverfault.com/questions/876233/how-to-send-an-email-if-a-systemd-service-is-restarted
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# Source: https://wiki.archlinux.org/index.php/Systemd/Timers#MAILTO
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# Usage: systemd-email <recipient-email> <failed-systemd-unit-name>
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# According to
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# http://www.flashissue.com/blog/gmail-sending-limits/
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# Gmail blocks your account if you send more than 500 emails per day, which is one email every
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# (24 * 60 * 60) / 500 = 172.8 second => choose a min wait time which is significantly longer than this to be on the safe time to not exceed 500 emails per day.
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# However this source
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# https://group-mail.com/sending-email/email-send-limits-and-options/
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# says the limit when not using the Gmail webinterface but going directly to the SMTP server is 100-150 per day, which yelds maximum one email every
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# (24 * 60 * 60) / 100 = 864 second
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# 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.
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MIN_WAIT_TIME_S=900
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SCRIPT_NAME=$(basename "$0")
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LAST_RUN_FILE="/tmp/${SCRIPT_NAME}_last_run.txt"
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last_touch() {
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stat -c %Y "$1"
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}
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waited_long_enough() {
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retval=1
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if [ -e "$LAST_RUN_FILE" ]; then
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now=$(date +%s)
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last=$(last_touch "$LAST_RUN_FILE")
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wait_s=$((now - last))
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if [ "$wait_s" -gt "$MIN_WAIT_TIME_S" ]; then
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retval=0
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fi
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else
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retval=0
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fi
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[ $retval -eq 0 ] && touch "$LAST_RUN_FILE"
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return $retval
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}
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# Make sure that my Gmail account dont' get shut down because of sending too many emails!
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if ! waited_long_enough; then
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echo "Systemd email was not sent, as it's less than ${MIN_WAIT_TIME_S} seconds since the last one was sent."
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exit 1
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fi
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recipient=$1
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system_unit=$2
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sendmail -t <<ERRMAIL
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To: $recipient
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From: systemd <root@$HOSTNAME>
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Subject: [systemd-email] ${system_unit}
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Content-Transfer-Encoding: 8bit
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Content-Type: text/plain; charset=UTF-8
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$(systemctl status --full "$system_unit")
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ERRMAIL
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