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- /****************************************************************************
- * libs/libc/dirent/lib_readdirr.c
- *
- * Copyright (C) 2007-2009, 2011-2012 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <string.h>
- #include <dirent.h>
- #include <errno.h>
- #include <nuttx/fs/fs.h>
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: readdir_r
- *
- * Description:
- * The readdir() function returns a pointer to a dirent
- * structure representing the next directory entry in the
- * directory stream pointed to by dir. It returns NULL on
- * reaching the end-of-file or if an error occurred.
- *
- * Input Parameters:
- * dirp -- An instance of type DIR created by a previous
- * call to opendir();
- * entry -- The storage pointed to by entry must be large
- * enough for a dirent with an array of char d_name
- * members containing at least {NAME_MAX}+1 elements.
- * result -- Upon successful return, the pointer returned
- * at *result shall have the same value as the
- * argument entry. Upon reaching the end of the directory
- * stream, this pointer shall have the value NULL.
- *
- * Returned Value:
- * If successful, the readdir_r() function return s zero;
- * otherwise, an error number is returned to indicate the
- * error.
- *
- * EBADF - Invalid directory stream descriptor dir
- *
- ****************************************************************************/
- int readdir_r(FAR DIR *dirp, FAR struct dirent *entry,
- FAR struct dirent **result)
- {
- struct dirent *tmp;
- /* NOTE: The following use or errno is *not* thread-safe */
- set_errno(0);
- tmp = readdir(dirp);
- if (!tmp)
- {
- int error = get_errno();
- if (!error)
- {
- if (result)
- {
- *result = NULL;
- }
- return 0;
- }
- else
- {
- return error;
- }
- }
- if (entry)
- {
- memcpy(entry, tmp, sizeof(struct dirent));
- }
- if (result)
- {
- *result = entry;
- }
- return 0;
- }
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