40b9bd7a97
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4942 42af7a65-404d-4744-a932-0658087f49c3
131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
/****************************************************************************
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* fs_unlink.c
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*
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* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <unistd.h>
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#include <errno.h>
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#include <nuttx/fs/fs.h>
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#include "fs_internal.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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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: unlink
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*
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* Description: Remove a file managed a mountpoint
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*
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****************************************************************************/
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int unlink(FAR const char *pathname)
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{
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FAR struct inode *inode;
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const char *relpath = NULL;
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int ret;
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/* Get an inode for this file */
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inode = inode_find(pathname, &relpath);
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if (!inode)
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{
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/* There is no mountpoint that includes in this path */
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ret = ENOENT;
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goto errout;
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}
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/* Verify that the inode is a valid mountpoint. */
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if (!INODE_IS_MOUNTPT(inode) || !inode->u.i_mops)
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{
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ret = ENXIO;
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goto errout_with_inode;
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}
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/* Perform the unlink operation using the relative path
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* at the mountpoint.
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*/
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if (inode->u.i_mops->unlink)
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{
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ret = inode->u.i_mops->unlink(inode, relpath);
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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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else
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{
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ret = ENOSYS;
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goto errout_with_inode;
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}
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/* Successfully unlinked */
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inode_release(inode);
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return OK;
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errout_with_inode:
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inode_release(inode);
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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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