diff options
Diffstat (limited to 'nuttx/fs/fs_registerdriver.c')
-rw-r--r-- | nuttx/fs/fs_registerdriver.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/nuttx/fs/fs_registerdriver.c b/nuttx/fs/fs_registerdriver.c new file mode 100644 index 000000000..cc1759ee7 --- /dev/null +++ b/nuttx/fs/fs_registerdriver.c @@ -0,0 +1,120 @@ +/**************************************************************************** + * fs/fs_registerdriver.c + * + * Copyright (C) 2007-2009, 2012 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 <sys/types.h> +#include <errno.h> + +#include <nuttx/fs/fs.h> + +#include "fs_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: register_driver + * + * Description: + * Register a character driver inode the pseudo file system. + * + * Input parameters: + * path - The path to the inode to create + * fops - The file operations structure + * mode - inmode priviledges (not used) + * priv - Private, user data that will be associated with the inode. + * + * Returned Value: + * Zero on success (with the inode point in 'inode'); A negated errno + * value is returned on a failure (all error values returned by + * inode_reserve): + * + * EINVAL - 'path' is invalid for this operation + * EEXIST - An inode already exists at 'path' + * ENOMEM - Failed to allocate in-memory resources for the operation + * + ****************************************************************************/ + +int register_driver(FAR const char *path, FAR const struct file_operations *fops, + mode_t mode, FAR void *priv) +{ + FAR struct inode *node; + int ret; + + /* Insert a dummy node -- we need to hold the inode semaphore because we + * will have a momentarily bad structure. + */ + + inode_semtake(); + ret = inode_reserve(path, &node); + if (ret >= 0) + { + /* We have it, now populate it with driver specific information. */ + + INODE_SET_DRIVER(node); + + node->u.i_ops = fops; +#ifdef CONFIG_FILE_MODE + node->i_mode = mode; +#endif + node->i_private = priv; + ret = OK; + } + + inode_semgive(); + return ret; +} |