fs: fix rmSync error messages for non-ASCII paths

fs.rmSync previously embedded paths directly into
custom error messages while also passing the path
to ThrowErrnoException.

This caused duplicated paths for ASCII names and
corrupted paths for non-ASCII directory names on
Linux, and inconsistent path formatting on Windows.

Remove path concatenation from custom messages and
rely on ThrowErrnoException to attach the path safely.
Add a test to cover non-ASCII directory names.

Author: Yeaseen

src/api/exceptions.cc

@@ -20,6 +20,21 @@ using v8::Object;
 using v8::String;
 using v8::Value;
 
+static Local<String> StringFromPath(Isolate* isolate, const char* path) {
+#ifdef _WIN32
+  if (strncmp(path, "\\\\?\\UNC\\", 8) == 0) {
+    return String::Concat(
+        isolate,
+        FIXED_ONE_BYTE_STRING(isolate, "\\\\"),
+        String::NewFromUtf8(isolate, path + 8).ToLocalChecked());
+  } else if (strncmp(path, "\\\\?\\", 4) == 0) {
+    return String::NewFromUtf8(isolate, path + 4).ToLocalChecked();
+  }
+#endif
+
+  return String::NewFromUtf8(isolate, path).ToLocalChecked();
+}
+
 Local<Value> ErrnoException(Isolate* isolate,
                             int errorno,
                             const char* syscall,
@@ -42,7 +57,7 @@ Local<Value> ErrnoException(Isolate* isolate,
   Local<String> path_string;
   if (path != nullptr) {
     // FIXME(bnoordhuis) It's questionable to interpret the file path as UTF-8.
-    path_string = String::NewFromUtf8(isolate, path).ToLocalChecked();
+    path_string = StringFromPath(isolate, path);
   }
 
   if (path_string.IsEmpty() == false) {
@@ -72,22 +87,6 @@ Local<Value> ErrnoException(Isolate* isolate,
   return e;
 }
 
-static Local<String> StringFromPath(Isolate* isolate, const char* path) {
-#ifdef _WIN32
-  if (strncmp(path, "\\\\?\\UNC\\", 8) == 0) {
-    return String::Concat(
-        isolate,
-        FIXED_ONE_BYTE_STRING(isolate, "\\\\"),
-        String::NewFromUtf8(isolate, path + 8).ToLocalChecked());
-  } else if (strncmp(path, "\\\\?\\", 4) == 0) {
-    return String::NewFromUtf8(isolate, path + 4).ToLocalChecked();
-  }
-#endif
-
-  return String::NewFromUtf8(isolate, path).ToLocalChecked();
-}
-
-
 Local<Value> UVException(Isolate* isolate,
                          int errorno,
                          const char* syscall,

src/node_file.cc

@@ -1728,7 +1728,7 @@ static void RmSync(const FunctionCallbackInfo<Value>& args) {
   }
 
   // On Windows path::c_str() returns wide char, convert to std::string first.
-  std::string file_path_str = file_path.string();
+  std::string file_path_str = ConvertPathToUTF8(file_path);
   const char* path_c_str = file_path_str.c_str();
 #ifdef _WIN32
   int permission_denied_error = EPERM;
@@ -1737,17 +1737,17 @@ static void RmSync(const FunctionCallbackInfo<Value>& args) {
 #endif  // !_WIN32
 
   if (error == std::errc::operation_not_permitted) {
-    std::string message = "Operation not permitted: " + file_path_str;
+    std::string message = "Operation not permitted: ";
     return env->ThrowErrnoException(EPERM, "rm", message.c_str(), path_c_str);
   } else if (error == std::errc::directory_not_empty) {
-    std::string message = "Directory not empty: " + file_path_str;
+    std::string message = "Directory not empty: ";
     return env->ThrowErrnoException(
         ENOTEMPTY, "rm", message.c_str(), path_c_str);
   } else if (error == std::errc::not_a_directory) {
-    std::string message = "Not a directory: " + file_path_str;
+    std::string message = "Not a directory: ";
     return env->ThrowErrnoException(ENOTDIR, "rm", message.c_str(), path_c_str);
   } else if (error == std::errc::permission_denied) {
-    std::string message = "Permission denied: " + file_path_str;
+    std::string message = "Permission denied: ";
     return env->ThrowErrnoException(
         permission_denied_error, "rm", message.c_str(), path_c_str);
   }

test/parallel/test-fs-rmSync-special-char-additional-error.js

@@ -0,0 +1,51 @@
+'use strict';
+require('../common');
+const tmpdir = require('../common/tmpdir');
+const assert = require('node:assert');
+const fs = require('node:fs');
+const path = require('node:path');
+const { execSync } = require('child_process');
+
+tmpdir.refresh(); // Prepare a clean temporary directory
+
+const dirPath = path.join(tmpdir.path, '速速速_dir');
+const filePath = path.join(dirPath, 'test_file.txt');
+
+// Create a directory and a file within it
+fs.mkdirSync(dirPath, { recursive: true });
+fs.writeFileSync(filePath, 'This is a test file.');
+
+// Set permissions to simulate a permission denied scenario
+if (process.platform === 'win32') {
+  // Windows: Deny delete permissions
+  execSync(`icacls "${filePath}" /deny Everyone:(D)`);
+} else {
+  // Unix/Linux: Remove write permissions from the directory
+  fs.chmodSync(dirPath, 0o555); // Read and execute permissions only
+}
+
+// Attempt to delete the directory which should now fail
+try {
+  fs.rmSync(dirPath, { recursive: true });
+} catch (err) {
+  if (process.platform === 'win32') {
+    assert.strictEqual(err.code, 'EPERM');
+  } else {
+    // POSIX: rmSync may surface different errors
+    assert(['EACCES', 'EPERM', 'ENOTEMPTY'].includes(err.code), err.code);
+  }
+  assert.strictEqual(err.path, dirPath);
+  assert(err.message.includes(dirPath), 'Error message should include the path treated as a directory');
+}
+
+// Cleanup - resetting permissions and removing the directory safely
+if (process.platform === 'win32') {
+  // Remove the explicit permissions before attempting to delete
+  execSync(`icacls "${filePath}" /remove:d Everyone`);
+} else {
+  // Reset permissions to allow deletion
+  fs.chmodSync(dirPath, 0o755); // Restore full permissions to the directory
+}
+
+// Attempt to clean up
+fs.rmSync(dirPath, { recursive: true }); // This should now succeed