text: /**
   * 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.
   */
  
  #ifndef _FCHMODAT_H_
  #define _FCHMODAT_H_
  
  #include <sys/stat.h>
  
  #include <unistd.h>
  
  #define AT_SYMLINK_NOFOLLOW 0x01
  
  static int
  fchmodat(int fd, const char *path, mode_t mode, int flag)
  {
    int cfd, error, ret;
  
    cfd = open(".", O_RDONLY | O_DIRECTORY);
    if (cfd == -1)
      return (-1);
  
    if (fchdir(fd) == -1) {
      error = errno;
      (void)close(cfd);
      errno = error;
      return (-1);
    }
  
    if (flag == AT_SYMLINK_NOFOLLOW)
      ret = lchmod(path, mode);
    else
      ret = chmod(path, mode);
  
    error = errno;
    (void)fchdir(cfd);
    (void)close(cfd);
    errno = error;
    return (ret);
  }
  
  #endif  /* !_FCHMODAT_H_ */
  