fs: preserve rmSync errno for filesystem errors

src/node_file.cc

@@ -1924,9 +1924,12 @@ static void RmSync(const FunctionCallbackInfo<Value>& args) {
         permission_denied_error, "rm", message.c_str(), path_c_str);
   }
 
-  std::string message = "Unknown error: " + error.message();
-  return env->ThrowErrnoException(
-      UV_UNKNOWN, "rm", message.c_str(), path_c_str);
+#ifdef _WIN32
+  int errorno = uv_translate_sys_error(error.value());
+#else
+  int errorno = -error.value();
+#endif
+  return env->ThrowUVException(errorno, "rm", nullptr, path_c_str);
 }
 
 int MKDirpSync(uv_loop_t* loop,

test/parallel/test-fs-rm.js

@@ -225,6 +225,30 @@ if (isGitPresent) {
     message: /^ENOENT: no such file or directory, lstat/
   });
 
+  // Should preserve the errno for errors returned by std::filesystem.
+  // Refs: https://github.com/nodejs/node/issues/65884
+  if (common.isLinux) {
+    const dotDir = nextDirPath('rm-dot');
+    fs.mkdirSync(path.join(dotDir, 'child'), { recursive: true });
+    try {
+      assert.throws(() => {
+        fs.rmSync(path.join(dotDir, '.'), common.mustNotMutateObjectDeep({
+          force: true,
+          recursive: true,
+        }));
+      }, {
+        code: 'EINVAL',
+        errno: -22,
+        syscall: 'rm',
+      });
+    } finally {
+      fs.rmSync(dotDir, common.mustNotMutateObjectDeep({
+        force: true,
+        recursive: true,
+      }));
+    }
+  }
+
   // Should delete a file
   const filePath = tmpdir.resolve('rm-file.txt');
   fs.writeFileSync(filePath, '');