add fs_local_open example

paddle/fluid/framework/common/fs.cc

@@ -63,15 +63,14 @@ static std::shared_ptr<FILE> fs_open_internal(const std::string& path,
   if (buffer_size > 0) {
     char* buffer = new char[buffer_size];
     CHECK_EQ(0, setvbuf(&*fp, buffer, _IOFBF, buffer_size));
-    fp = {&*fp,
-          [ fp, buffer ] reinterpret_cast<FILE*> mutable {CHECK(fp.unique());
+    fp = {&*fp, [fp, buffer](FILE*) mutable {  // NOLINT
+            CHECK(fp.unique());                // NOLINT
             fp = nullptr;
             delete[] buffer;
+          }};
   }
-};
-}
 
-return fp;
+  return fp;
 }
 
 static bool fs_begin_with_internal(const std::string& path,

paddle/fluid/framework/common/shell.cc

@@ -41,9 +41,9 @@ std::shared_ptr<FILE> shell_fopen(const std::string& path,
 // Mostly copy from CPython code
 static int close_open_fds_internal() {
   struct linux_dirent {
-    int64 d_ino = 0;
+    long d_ino = 0;  // NOLINT
     off_t d_off;
-    uint16 d_reclen = 0;
+    unsigned short d_reclen = 0;  // NOLINT
     char d_name[256];
   };
 

paddle/fluid/framework/data_feed.cc

@@ -95,7 +95,7 @@ template <typename T>
 bool PrivateQueueDataFeed<T>::Start() {
   CheckSetFileList();
   std::string filename;
-  while (PickOneFile(&filename)) {
+  if (PickOneFile(&filename)) {
     int err_no = 0;
     std::string pipeline_cmd = "cat";