main: Prevent installing base titles into NAND

Many users have been installing their base titles into NAND instead of adding them into the games list. This prevents users from installing any base titles and warns the user about the action.

2 files changed, 8 insertions, 0 deletions

diff --git a/src/core/file_sys/registered_cache.cpp b/src/core/file_sys/registered_cache.cpp
index 1fb66874e..b0cb65952 100644
--- a/src/core/file_sys/registered_cache.cpp
+++ b/src/core/file_sys/registered_cache.cpp
@@ -12,6 +12,7 @@
 #include "common/logging/log.h"
 #include "core/crypto/key_manager.h"
 #include "core/file_sys/card_image.h"
+#include "core/file_sys/common_funcs.h"
 #include "core/file_sys/content_archive.h"
 #include "core/file_sys/nca_metadata.h"
 #include "core/file_sys/registered_cache.h"
@@ -592,6 +593,12 @@ InstallResult RegisteredCache::InstallEntry(const NSP& nsp, bool overwrite_if_ex
     const CNMT cnmt(cnmt_file);
 
     const auto title_id = cnmt.GetTitleID();
+    const auto version = cnmt.GetTitleVersion();
+
+    if (title_id == GetBaseTitleID(title_id) && version == 0) {
+        return InstallResult::ErrorBaseInstall;
+    }
+
     const auto result = RemoveExistingEntry(title_id);
 
     // Install Metadata File
diff --git a/src/core/file_sys/registered_cache.h b/src/core/file_sys/registered_cache.h
index b31630014..d042aef90 100644
--- a/src/core/file_sys/registered_cache.h
+++ b/src/core/file_sys/registered_cache.h
@@ -38,6 +38,7 @@ enum class InstallResult {
     ErrorAlreadyExists,
     ErrorCopyFailed,
     ErrorMetaFailed,
+    ErrorBaseInstall,
 };
 
 struct ContentProviderEntry {