linux/payload/PlocMpsocSpecialComHelper.cpp

@@ -179,9 +179,12 @@ ReturnValue_t PlocMpsocSpecialComHelper::performFlashWrite() {
 
 ReturnValue_t PlocMpsocSpecialComHelper::performFlashRead() {
   std::error_code e;
-  std::ofstream ofile(flashReadAndWrite.obcFile,
-                      std::ios::trunc | std::ios::binary | std::ios::app);
-  if (ofile.bad()) {
+  if (std::filesystem::exists(flashReadAndWrite.obcFile)) {
+    // Truncate the file first.
+    std::ofstream ofile(flashReadAndWrite.obcFile, std::ios::binary | std::ios::trunc);
+  }
+  std::ofstream ofile(flashReadAndWrite.obcFile, std::ios::binary | std::ios::app);
+  if (ofile.bad() or not ofile.is_open()) {
     return returnvalue::FAILED;
   }
   ReturnValue_t result = flashfopen(mpsoc::FileAccessModes::READ);