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Diffstat (limited to 'nuttx/fs/fs_inodefind.c')
-rw-r--r-- | nuttx/fs/fs_inodefind.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/nuttx/fs/fs_inodefind.c b/nuttx/fs/fs_inodefind.c new file mode 100644 index 000000000..905539366 --- /dev/null +++ b/nuttx/fs/fs_inodefind.c @@ -0,0 +1,99 @@ +/**************************************************************************** + * fs/fs_inodefind.c + * + * Copyright (C) 2007-2009 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 <errno.h> +#include <nuttx/fs/fs.h> + +#include "fs_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: inode_find + * + * Description: + * This is called from the open() logic to get a reference to the inode + * associated with a path. + * + ****************************************************************************/ + +FAR struct inode *inode_find(FAR const char *path, FAR const char **relpath) +{ + FAR struct inode *node; + + if (!*path || path[0] != '/') + { + return NULL; + } + + /* Find the node matching the path. If found, increment the count of + * references on the node. + */ + + inode_semtake(); + node = inode_search(&path, (FAR struct inode**)NULL, (FAR struct inode**)NULL, relpath); + if (node) + { + node->i_crefs++; + } + + inode_semgive(); + return node; +} + |