From aabcd0ac01339d6cb65f4b7607a697a2fe52043d Mon Sep 17 00:00:00 2001
From: Jonas Gunz <himself@jonasgunz.de>
Date: Thu, 5 Nov 2020 15:21:18 +0100
Subject: check_systemd

---
 check_systemd | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100755 check_systemd

diff --git a/check_systemd b/check_systemd
new file mode 100755
index 0000000..b2b140c
--- /dev/null
+++ b/check_systemd
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# USAGE:
+# check_systemd [UNIT ...]
+
+FAILED=()
+
+if ! systemctl is-system-running > /dev/null; then
+	echo systemd CRITICAL: System state degraded.
+	exit 2
+fi
+
+for unit in "$@"; do
+	if ! systemctl is-active "$unit" > /dev/null; then
+		FAILED+=("$unit")
+	fi
+done
+
+if [ ${#FAILED[@]} -gt 0 ]; then
+	echo "systemd CRITICAL: failed units: ${FAILED[@]}"
+	exit 2
+fi
+
+echo "systemd OK: $# units checked"
+exit 0
-- 
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