forked from Archive/PX4-Autopilot
92 lines
3.3 KiB
C
92 lines
3.3 KiB
C
/****************************************************************************
|
|
* fs/fs_telldir.c
|
|
*
|
|
* Copyright (C) 2007, 2008, 2011 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* 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 <sys/types.h>
|
|
#include <dirent.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/fs.h>
|
|
#include <nuttx/dirent.h>
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: telldir
|
|
*
|
|
* Description:
|
|
* The telldir() function returns the current location
|
|
* associated with the directory stream dirp.
|
|
*
|
|
* Inputs:
|
|
* dirp -- An instance of type DIR created by a previous
|
|
* call to opendir();
|
|
*
|
|
* Return:
|
|
* On success, the telldir() function returns the current
|
|
* location in the directory stream. On error, -1 is
|
|
* returned, and errno is set appropriately.
|
|
*
|
|
* EBADF - Invalid directory stream descriptor dir
|
|
*
|
|
****************************************************************************/
|
|
|
|
off_t telldir(FAR DIR *dirp)
|
|
{
|
|
struct fs_dirent_s *idir = (struct fs_dirent_s *)dirp;
|
|
|
|
if (!idir || !idir->fd_root)
|
|
{
|
|
*get_errno_ptr() = EBADF;
|
|
return (off_t)-1;
|
|
}
|
|
|
|
/* Just return the current position */
|
|
|
|
return idir->fd_position;
|
|
}
|
|
|