text: // Copyright 2018-2019 Espressif Systems (Shanghai) PTE LTD
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #include <stdarg.h>
  #include <fcntl.h>
  
  int fcntl(int fd, int request, ...)
  {
      int val, ret;
      va_list va;
  
      va_start(va, request);
      
      val = va_arg(va, int);
      ret = lwip_fcntl(fd, request, val);
  
      va_end(va);
  
      return ret;    
  }
  