From bbec74337b3186bc258bd5adf849b89191789535 Mon Sep 17 00:00:00 2001
From: Fabian Vogt <fabian@ritter-vogt.de>
Date: Fri, 29 Jan 2021 11:31:54 +0100
Subject: [PATCH] Don't let kglobalaccel run if KDE_SESSION_UID mismatches

Otherwise shortcuts execute actions as the wrong user.
---
 src/runtime/main.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/runtime/main.cpp b/src/runtime/main.cpp
index d2917ad..46506b3 100644
--- a/src/runtime/main.cpp
+++ b/src/runtime/main.cpp
@@ -10,6 +10,8 @@
 #include "kglobalacceld.h"
 #include "logging_p.h"
 
+#include <unistd.h>
+
 #include <KAboutData>
 #include <KCrash>
 #include <KDBusService>
@@ -57,6 +59,16 @@ extern "C" Q_DECL_EXPORT int main(int argc, char **argv)
         return 0;
     }
 
+    // It's possible that kglobalaccel gets started as the wrong user by
+    // accident, e.g. kdesu dolphin leads to dbus activation. It then installs
+    // its grabs and the actions are run as the wrong user.
+    bool isUidset = false;
+    const int sessionuid = qEnvironmentVariableIntValue("KDE_SESSION_UID", &isUidset);
+    if(isUidset && static_cast<uid_t>(sessionuid) != getuid()) {
+        qCWarning(KGLOBALACCELD) << "kglobalaccel running as wrong user, exiting.";
+        return 0;
+    }
+
     KDBusService service(KDBusService::Unique);
 
     app.setQuitOnLastWindowClosed(false);
-- 
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