123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
/****************************************************************************
|
|
* 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.
|
|
*
|
|
* Inputs:
|
|
* 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.
|
|
*
|
|
* Return:
|
|
* 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;
|
|
}
|
|
|