[freespacenotifier] impr: no notification for ro filesystems

(cherry picked from commit 6af29669)

freespacenotifier/module.cpp

@@ -31,12 +31,18 @@ FreeSpaceNotifierModule::FreeSpaceNotifierModule(QObject *parent, const QList<QV
     const QString rootPath = QStringLiteral("/");
     const QString homePath = QDir::homePath();
 
-    auto *homeNotifier = new FreeSpaceNotifier(homePath, ki18n("Your Home folder is running out of disk space, you have %1 MiB remaining (%2%)."), this);
-    connect(homeNotifier, &FreeSpaceNotifier::configureRequested, this, &FreeSpaceNotifierModule::showConfiguration);
+    const auto homeMountPoint = KMountPoint::currentMountPoints().findByPath(homePath);
+
+    if ( !homeMountPoint || !homeMountPoint->mountOptions().contains(QLatin1String("ro")) ) {
+        auto *homeNotifier = new FreeSpaceNotifier(homePath, ki18n("Your Home folder is running out of disk space, you have %1 MiB remaining (%2%)."), this);
+        connect(homeNotifier, &FreeSpaceNotifier::configureRequested, this, &FreeSpaceNotifierModule::showConfiguration);
+    }
 
     // If Home is on a separate partition from Root, warn for it, too.
-    auto homeMountPoint = KMountPoint::currentMountPoints().findByPath(homePath);
-    if (!homeMountPoint || homeMountPoint->mountPoint() != rootPath) {
+    if (KMountPoint::Ptr rootMountPoint; !homeMountPoint ||
+                                        ( homeMountPoint->mountPoint() != rootPath &&
+                                          ( !(rootMountPoint = KMountPoint::currentMountPoints().findByPath(rootPath)) ||
+                                            !rootMountPoint->mountOptions().contains(QLatin1String("ro")) ) ) ) {
         auto *rootNotifier = new FreeSpaceNotifier(rootPath, ki18n("Your Root partition is running out of disk space, you have %1 MiB remaining (%2%)."), this);
         connect(rootNotifier, &FreeSpaceNotifier::configureRequested, this, &FreeSpaceNotifierModule::showConfiguration);
     }