fs: translate error code properly in cpSync

src/node_file.cc

@@ -3147,7 +3147,14 @@ static void CpSyncCheckPaths(const FunctionCallbackInfo<Value>& args) {
                         ? std::filesystem::symlink_status(src_path, error_code)
                         : std::filesystem::status(src_path, error_code);
   if (error_code) {
-    return env->ThrowUVException(EEXIST, "lstat", nullptr, src.out());
+#ifdef _WIN32
+    int errorno = uv_translate_sys_error(error_code.value());
+#else
+    int errorno =
+        error_code.value() > 0 ? -error_code.value() : error_code.value();
+#endif
+    return env->ThrowUVException(
+        errorno, dereference ? "stat" : "lstat", nullptr, src.out());
   }
   auto dest_status =
       dereference ? std::filesystem::symlink_status(dest_path, error_code)

test/parallel/test-fs-cp.mjs

@@ -419,6 +419,26 @@ if (!isWindows) {
   );
 }
 
+// It throws an error when attempting to copy a file with a name that is too long.
+{
+  const src = 'a'.repeat(5000);
+  const dest = nextdir();
+  assert.throws(
+    () => cpSync(src, dest),
+    { code: isWindows ? 'ENOENT' : 'ENAMETOOLONG' }
+  );
+}
+
+// It throws an error when attempting to copy a dir that does not exist.
+{
+  const src = nextdir();
+  const dest = nextdir();
+  assert.throws(
+    () => cpSync(src, dest, mustNotMutateObjectDeep({ recursive: true })),
+    { code: 'ENOENT' }
+  );
+}
+
 // It makes file writeable when updating timestamp, if not writeable.
 {
   const src = nextdir();