147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/****************************************************************************
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* fs/dirent/fs_closedir.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 "inode/inode.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: closedir
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*
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* Description:
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* The closedir() function closes the directory stream associated with
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* 'dirp'. The directory stream descriptor 'dirp' is not available after
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* this call.
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*
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* Input Parameters:
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* dirp -- An instance of type DIR created by a previous call to opendir();
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*
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* Returned Value:
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* The closedir() function returns 0 on success. On error, -1 is
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* 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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#ifndef CONFIG_DISABLE_MOUNTPOINT
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struct inode *inode;
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#endif
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int ret;
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/* Verify that we were provided with a valid directory structure */
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if (!idir)
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{
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ret = -EBADF;
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goto errout;
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}
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/* A special case is when we enumerate an "empty", unused inode.
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* That is an inode in the pseudo-filesystem that has no operations
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* and no children.
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* This is a "dangling" directory entry that has lost its childre.
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*/
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if (idir->fd_root)
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{
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/* This is the 'root' inode of the directory. This means different
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* things with different filesystems.
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*/
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#ifndef CONFIG_DISABLE_MOUNTPOINT
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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
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* root inode we have open.
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*/
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if (INODE_IS_MOUNTPT(inode) && !DIRENT_ISPSEUDONODE(idir->fd_flags))
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{
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/* The node is a file system mointpoint. Verify that the
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* mountpoint supports the closedir() method (not an error if it
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* 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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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 pseudo 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.pseudo.fd_next)
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{
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inode_release(idir->u.pseudo.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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}
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/* Then release the container */
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kumm_free(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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kumm_free(idir);
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#endif
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errout:
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set_errno(-ret);
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return ERROR;
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}
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