From 02317993c88509997c056b66a06214c007789e0e Mon Sep 17 00:00:00 2001
From: black-desk <me@black-desk.cn>
Date: Mon, 28 Aug 2023 15:56:43 +0800
Subject: [PATCH] fix: call "Subscribe" before connect to systemd

systemd will only send UnitNew/UnitRemoved after Subscribe called.
---
 src/systemdsignaldispatcher.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/systemdsignaldispatcher.h b/src/systemdsignaldispatcher.h
index d1f950b..6a7cfb9 100644
--- a/src/systemdsignaldispatcher.h
+++ b/src/systemdsignaldispatcher.h
@@ -6,6 +6,7 @@
 #define SYSTEMDSIGNALDISPATCHER_H
 
 #include "global.h"
+#include <QDBusMessage>
 
 class SystemdSignalDispatcher : public QObject
 {
@@ -29,6 +30,11 @@ private:
     explicit SystemdSignalDispatcher(QObject *parent = nullptr)
         : QObject(parent)
     {
+        auto &con = ApplicationManager1DBus::instance().globalDestBus();
+        auto ret = con.call(QDBusMessage::createMethodCall(SystemdService, SystemdObjectPath, SystemdInterfaceName, "Subscribe"));
+        if (ret.type() == QDBusMessage::ErrorMessage) {
+            qFatal("%s", ret.errorMessage().toLocal8Bit().data());
+        }
         if (!connectToSignals()) {
             std::terminate();
         }