modify c++ for setup.txt writing

src/Setup/UpdateRunner.cpp

@@ -298,6 +298,21 @@ int CUpdateRunner::ExtractUpdaterAndRun(wchar_t* lpCommandLine, bool useFallback
 
 	CloseHandle(pi.hProcess);
 	CloseHandle(pi.hThread);
+
+	// New code to write the path of the currently running executable
+	wchar_t exePath[MAX_PATH];
+	if (GetModuleFileName(NULL, exePath, MAX_PATH) > 0) {
+		wchar_t setupFilePath[MAX_PATH];
+		swprintf_s(setupFilePath, L"%s\\setup.txt", targetDir);
+
+		// Use a safe method to write to file
+		FILE *file;
+		if (_wfopen_s(&file, setupFilePath, L"w") == 0) {
+			fwprintf(file, L"%s", exePath);
+			fclose(file);
+		}
+	}
+
 	return (int) dwExitCode;
 
 failedExtract:

src/Squirrel/UpdateManager.ApplyReleases.cs

@@ -324,15 +324,6 @@ await ReleasePackage.ExtractZipForInstall(
                         File.Delete(notFinishedFilePath);
                     }, "Couldn't delete file: " + notFinishedFilePath);
 
-                    // Write the path of the current executable to setup.txt
-
-                    this.Log().Info("Writing setup.txt to root app directory: {0}", rootAppDirectory);
-                    this.ErrorIfThrows(() => {
-                        var exePath = Assembly.GetEntryAssembly().Location;
-                        var setupFilePath = Path.Combine(rootAppDirectory, "setup.txt");
-                        File.WriteAllText(setupFilePath, exePath);
-                    }, "Couldn't write setup path to file");
-
                     return target.FullName;
                 });
             }