Fix crash when updating admin installation with user/temp repository

Grant permission rights for writing maintenance config file

Change-Id: I9364358455b8ad5e98b03c20d949c2562ba2535a
Task-number: QTIFW-740
Reviewed-by: Iikka Eklund <iikka.eklund@theqtcompany.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/src/libs/installer/packagemanagercore.cpp b/src/libs/installer/packagemanagercore.cpp
index 81fd29472..e008a220d 100644
--- a/src/libs/installer/packagemanagercore.cpp
+++ b/src/libs/installer/packagemanagercore.cpp
@@ -1025,8 +1025,17 @@ void PackageManagerCore::networkSettingsChanged()
     d->m_repoFetched = false;
     d->m_updateSourcesAdded = false;
 
-    if (d->isUpdater() || d->isPackageManager())
+    if (d->isUpdater() || d->isPackageManager()) {
+        bool gainedAdminRights = false;
+        QTemporaryFile tempAdminFile(d->targetDir() + QStringLiteral("/XXXXXX"));
+        if (!tempAdminFile.open() || !tempAdminFile.isWritable()) {
+            gainAdminRights();
+            gainedAdminRights = true;
+        }
         d->writeMaintenanceConfigFiles();
+        if (gainedAdminRights)
+            dropAdminRights();
+    }
     KDUpdater::FileDownloaderFactory::instance().setProxyFactory(proxyFactory());
 
     emit coreNetworkSettingsChanged();