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91 lines
3.3 KiB
91 lines
3.3 KiB
/**************************************************************************** |
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* libc/dirent/fs_telldir.c |
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* |
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* Copyright (C) 2007-2008, 2011-2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <sys/types.h> |
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#include <dirent.h> |
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#include <errno.h> |
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#include <nuttx/fs/fs.h> |
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#include <nuttx/fs/dirent.h> |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: telldir |
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* |
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* Description: |
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* The telldir() function returns the current location |
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* associated with the directory stream dirp. |
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* |
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* Inputs: |
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* dirp -- An instance of type DIR created by a previous |
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* call to opendir(); |
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* |
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* Return: |
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* On success, the telldir() function returns the current |
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* location in the directory stream. On error, -1 is |
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* returned, and errno is set appropriately. |
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* |
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* EBADF - Invalid directory stream descriptor dir |
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* |
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****************************************************************************/ |
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off_t telldir(FAR DIR *dirp) |
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{ |
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struct fs_dirent_s *idir = (struct fs_dirent_s *)dirp; |
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if (!idir || !idir->fd_root) |
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{ |
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set_errno(EBADF); |
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return (off_t)-1; |
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} |
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/* Just return the current position */ |
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return idir->fd_position; |
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} |
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