54 lines
1.4 KiB
Bash
Executable File
54 lines
1.4 KiB
Bash
Executable File
#! /bin/bash
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#
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# check_systemd_unit.sh
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# Copyright (C) 2021 Vintage Salt <rehashedsalt@cock.li>
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#
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# Distributed under terms of the MIT license.
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#
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# Usage: Set the first argument to be a systemd unit. The script will respond with the following:
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# The unit is running OK
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# The unit is dead
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service="$1"
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# If the service is null, be critical
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if [ -z "$service" ]; then
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echo "UNIT CRITICAL - Service is undefined"
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exit 2
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# If systemctl is not present, be critical
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elif ! command -v systemctl > /dev/null 2>&1; then
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echo "UNIT CRITICAL - systemctl missing from PATH"
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exit 2
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# If the service is failed, be critical
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elif systemctl is-failed --quiet "$service" > /dev/null 2>&1; then
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echo "UNIT CRITICAL - $service is failed"
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exit 2
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# Otherwise, see what its state is
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else
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systemctl status "$service" > /dev/null 2>&1
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case $? in
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0)
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echo "UNIT OK - $service is running"
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exit 0
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;;
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1|2)
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echo "UNIT CRITICAL - $service is dead"
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exit 2
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;;
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3)
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# In this case, the unit is not running. Whether this is an issue depends on the type of service
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if systemctl cat "$service" | grep -ie '^Type=' | grep -ie 'oneshot' > /dev/null 2>&1; then
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echo "UNIT OK - $service is type oneshot and not running"
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exit 0
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else
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echo "UNIT CRITICAL - $service is not running"
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exit 2
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fi
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;;
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4)
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echo "UNIT CRITICAL - $service is not present on this machine"
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exit 2
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;;
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esac
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fi
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