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/************************************************************
* fs_inodefinddir.c
*
* Copyright (C) 2007 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 Gregory Nutt 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 <string.h>
#include <errno.h>
#include <nuttx/fs.h>
#include "fs_internal.h"
#if CONFIG_NFILE_DESCRIPTORS >0
/************************************************************
* Definitions
************************************************************/
/************************************************************
* Private Variables
************************************************************/
/************************************************************
* Public Variables
************************************************************/
/************************************************************
* Private Functions
************************************************************/
/************************************************************
* Public Functions
************************************************************/
/************************************************************
* Name: inode_finddir
*
* Description:
* This is called from the opendir() logic to get a reference
* to the inode associated with a directory. There are no
* real directories in this design; For our purposes, a
* directory inode is simply one that has children.
*
************************************************************/
FAR struct inode *inode_finddir(const char *path)
{
FAR struct inode *node;
FAR struct inode *child = NULL;
/* If we are given 'nothing' then we will interpret this as
* request for the root inode.
*/
if (!path || *path == 0 || strcmp(path, "/") == 0)
{
return root_inode;
}
/* We don't know what to do with relative pathes */
if (*path != '/')
{
return NULL;
}
/* Find the node matching the path. */
inode_semtake();
/* Handle some special cases */
node = inode_search(&path, (FAR void*)NULL, (FAR void*)NULL, (FAR const char*)NULL);
if (node)
{
/* Does the inode have a child? If so that the child
* would be the 'head' of a list of nodes under the
* directory.
*/
child = node->i_child;
if (child)
{
/* If found, then increment the count of
* references on the child node.
*/
child->i_crefs++;
}
}
inode_semgive();
return child;
}
#endif /* CONFIG_NFILE_DESCRIPTORS */
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