incubator-nuttx/libs/libc/stdio/lib_tmpfile.c

/****************************************************************************
 * libs/libc/stdio/lib_tmpfile.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you 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.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

/****************************************************************************
 * Public Functions
 ****************************************************************************/

FAR FILE *tmpfile(void)
{
  char path[L_tmpnam] = P_tmpdir "/XXXXXX.tmp";
  FAR FILE *fp = NULL;
  int fd;

  fd = mkstemp(path);
  if (fd >= 0)
    {
      unlink(path);
      fp = fdopen(fd, "w+");
      if (fp == NULL)
        {
          close(fd);
        }
    }

  return fp;
}