forked from Archive/PX4-Autopilot
151 lines
4.6 KiB
C
151 lines
4.6 KiB
C
/****************************************************************************
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* fs/fs_closedir.c
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*
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* Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 <dirent.h>
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#include <errno.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/fs/dirent.h>
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#include "fs_internal.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: seekdir
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*
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* Description:
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* The closedir() function closes the directory stream
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* associated with 'dirp'. The directory stream
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* descriptor 'dirp' is not available after this call.
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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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* The closedir() function returns 0 on success. On error,
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* -1 is returned, and errno is set appropriately.
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*
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****************************************************************************/
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int closedir(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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struct inode *inode;
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int ret;
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if (!idir || !idir->fd_root)
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{
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ret = EBADF;
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goto errout;
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}
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/* This is the 'root' inode of the directory. This means different
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* things wih different filesystems.
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*/
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inode = idir->fd_root;
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/* The way that we handle the close operation depends on what kind of root
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* inode we have open.
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*/
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#ifndef CONFIG_DISABLE_MOUNTPOINT
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if (INODE_IS_MOUNTPT(inode) && !DIRENT_ISPSUEDONODE(idir->fd_flags))
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{
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/* The node is a file system mointpoint. Verify that the mountpoint
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* supports the closedir() method (not an error if it does not)
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*/
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if (inode->u.i_mops && inode->u.i_mops->closedir)
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{
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/* Perform the closedir() operation */
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ret = inode->u.i_mops->closedir(inode, idir);
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if (ret < 0)
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{
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ret = -ret;
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goto errout_with_inode;
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}
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}
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}
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else
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#endif
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{
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/* The node is part of the root psuedo file system, release
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* our contained reference to the 'next' inode.
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*/
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if (idir->u.psuedo.fd_next)
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{
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inode_release(idir->u.psuedo.fd_next);
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}
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}
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/* Release our references on the contained 'root' inode */
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inode_release(idir->fd_root);
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/* Then release the container */
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kfree(idir);
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return OK;
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#ifndef CONFIG_DISABLE_MOUNTPOINT
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errout_with_inode:
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inode_release(inode);
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kfree(idir);
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#endif
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errout:
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errno = ret;
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return ERROR;
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}
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