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- /****************************************************************************
- * libs/libc/dirent/fs_telldir.c
- *
- * Copyright (C) 2007-2008, 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 <sys/types.h>
- #include <dirent.h>
- #include <errno.h>
- #include <nuttx/fs/fs.h>
- #include <nuttx/fs/dirent.h>
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: telldir
- *
- * Description:
- * The telldir() function returns the current location
- * associated with the directory stream dirp.
- *
- * Input Parameters:
- * dirp -- An instance of type DIR created by a previous
- * call to opendir();
- *
- * Returned Value:
- * 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)
- {
- set_errno(EBADF);
- return (off_t)-1;
- }
- /* Just return the current position */
- return idir->fd_position;
- }
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