From bb658d21ea2802b73aaf7d497f9fde852e866275 Mon Sep 17 00:00:00 2001
From: Oliver Jowett <oliver.jowett@flightaware.com>
Date: Fri, 3 Nov 2023 15:44:50 +0800
Subject: [PATCH] Work around debhelper bug #989155

On buster/bullseye this bug is unfixed and the service won't be
correctly stopped/restarted if the old package version doesn't
stop the service in prerm.
---
 debian-bullseye/dump1090-fa.preinst | 7 +++++++
 debian-buster/dump1090-fa.preinst   | 7 +++++++
 2 files changed, 14 insertions(+)
 create mode 100755 debian-bullseye/dump1090-fa.preinst
 create mode 100755 debian-buster/dump1090-fa.preinst

diff --git a/debian-bullseye/dump1090-fa.preinst b/debian-bullseye/dump1090-fa.preinst
new file mode 100755
index 000000000..a203c406a
--- /dev/null
+++ b/debian-bullseye/dump1090-fa.preinst
@@ -0,0 +1,7 @@
+#!/bin/sh
+set -e
+
+# Work around Debian bug #989155
+if [ "$1" = upgrade ] && [ -d /run/systemd/system ] ; then
+	deb-systemd-invoke stop 'dump1090-fa.service' >/dev/null || true
+fi
diff --git a/debian-buster/dump1090-fa.preinst b/debian-buster/dump1090-fa.preinst
new file mode 100755
index 000000000..a203c406a
--- /dev/null
+++ b/debian-buster/dump1090-fa.preinst
@@ -0,0 +1,7 @@
+#!/bin/sh
+set -e
+
+# Work around Debian bug #989155
+if [ "$1" = upgrade ] && [ -d /run/systemd/system ] ; then
+	deb-systemd-invoke stop 'dump1090-fa.service' >/dev/null || true
+fi