From 1826b54dcb403c6ddcbd644355df3de7ace1ded2 Mon Sep 17 00:00:00 2001
From: PabloMK7 <hackyglitch2@gmail.com>
Date: Sat, 15 Mar 2025 22:29:48 +0100
Subject: [PATCH] Check for null file (fastboot3ds issue)

---
 plugin/sources/ArticFunctions.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/plugin/sources/ArticFunctions.cpp b/plugin/sources/ArticFunctions.cpp
index 8fc39b3..5042bae 100644
--- a/plugin/sources/ArticFunctions.cpp
+++ b/plugin/sources/ArticFunctions.cpp
@@ -658,6 +658,15 @@ namespace ArticFunctions {
             u32 bytes_read = 0;
             res = FSFILE_Read(file, &bytes_read, 0, ret_buf->data, (u32)size);
             FSFILE_Close(file);
+            if (R_SUCCEEDED(res) && bytes_read == size) {
+                u64 check_null = *reinterpret_cast<u64*>(ret_buf->data);
+                if (check_null == 0) {
+                    logger.Error("The OTP backup in your SD card is empty\n    This is an known issue with fastboot3DS\n    Dump the otp file manually and place in:");
+                    logger.Error(filePath);
+                    mi.FinishGood(-3);
+                    return;
+                }
+            }
             mi.FinishGood(bytes_read != size ? -2 : res);
         } else if (type == 4) {
             Result res = cfguInit();