From c5fd1da26919aca035235c29d14d845145e2d09b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Danielle=20For=C3=A9?= <danielle@elementary.io>
Date: Mon, 28 Oct 2024 17:50:37 -0700
Subject: [PATCH] Don't check for updates in demo mode (#163)

---
 src/Backends/SystemUpdate.vala |  4 ++++
 src/Utils/SessionUtils.vala    | 23 +++++++++++++++++++++++
 src/meson.build                |  1 +
 3 files changed, 28 insertions(+)
 create mode 100644 src/Utils/SessionUtils.vala

diff --git a/src/Backends/SystemUpdate.vala b/src/Backends/SystemUpdate.vala
index e8902632..7908d369 100644
--- a/src/Backends/SystemUpdate.vala
+++ b/src/Backends/SystemUpdate.vala
@@ -65,6 +65,10 @@ public class SettingsDaemon.Backends.SystemUpdate : Object {
     }
 
     public async void check_for_updates (bool force, bool notify) throws DBusError, IOError {
+        if (SettingsDaemon.Utils.is_running_in_demo_mode () && !force) {
+            return;
+        }
+
         if (current_state.state != UP_TO_DATE && current_state.state != AVAILABLE && !force) {
             return;
         }
diff --git a/src/Utils/SessionUtils.vala b/src/Utils/SessionUtils.vala
new file mode 100644
index 00000000..92c23573
--- /dev/null
+++ b/src/Utils/SessionUtils.vala
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2024 elementary, Inc. (https://elementary.io)
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+namespace SettingsDaemon.Utils {
+    public static bool is_running_in_demo_mode () {
+        var proc_cmdline = File.new_for_path ("/proc/cmdline");
+        try {
+            var @is = proc_cmdline.read ();
+            var dis = new DataInputStream (@is);
+
+            var line = dis.read_line ();
+            if ("boot=casper" in line || "boot=live" in line || "rd.live.image" in line) {
+                return true;
+            }
+        } catch (Error e) {
+            critical ("Couldn't detect if running in Demo Mode: %s", e.message);
+        }
+
+        return false;
+    }
+}
diff --git a/src/meson.build b/src/meson.build
index eda9764c..472148b9 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -11,6 +11,7 @@ sources = files(
     'Backends/PrefersColorSchemeSettings.vala',
     'Backends/SystemUpdate.vala',
     'Utils/PkUtils.vala',
+    'Utils/SessionUtils.vala',
     'Utils/SunriseSunsetCalculator.vala',
 )