From 028ed93e202dfb0520278b7edb6def44bc50fc57 Mon Sep 17 00:00:00 2001
From: Mark Hindley <mark@hindley.org.uk>
Date: Sat, 2 Apr 2022 09:46:32 +0100
Subject: [PATCH] Add preinst to abort installation on systemd booted systems.

---
 debian/preinst | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 debian/preinst

diff --git a/debian/preinst b/debian/preinst
new file mode 100644
index 0000000..f058d9f
--- /dev/null
+++ b/debian/preinst
@@ -0,0 +1,10 @@
+#!/bin/sh
+set -e
+#
+# Prevent installation if systemd is the active init.
+#
+if [ -d /run/systemd/system ]; then
+    echo "systemd is the active init system, ${DPKG_MAINTSCRIPT_PACKAGE} cannot replace or provide real systemd functionality."
+    exit 1
+fi
+#DEBHELPER#