111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/****************************************************************************
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* fs/inode/fs_fileopen.c
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*
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* Copyright (C) 2018-2019 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 <sys/types.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <nuttx/fs/fs.h>
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#include "inode/inode.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: file_open
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*
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* Description:
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* file_open() is similar to the standard 'open' interface except that it
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* returns an instance of 'struct file' rather than a file descriptor. It
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* also is not a cancellation point and does not modify the errno variable.
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*
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* Input Parameters:
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* filep - The caller provided location in which to return the 'struct
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* file' instance.
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* path - The full path to the file to be open.
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* oflags - open flags
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* ... - Variable number of arguments, may include 'mode_t mode'
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*
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* Returned Value:
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* Zero (OK) is returned on success. On failure, a negated errno value is
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* returned.
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*
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****************************************************************************/
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int file_open(FAR struct file *filep, FAR const char *path, int oflags, ...)
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{
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va_list ap;
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int ret;
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int fd;
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DEBUGASSERT(filep != NULL && path != NULL);
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/* At present, this is just a placeholder. It is just a wrapper around
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* nx_open() followed by a called to file_detach(). Ideally, this should
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* a native open function that opens the VFS node directly without using
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* any file descriptors.
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*/
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va_start(ap, oflags);
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fd = nx_vopen(path, oflags, ap);
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va_end(ap);
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if (fd < 0)
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{
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return fd;
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}
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/* Detach the file structure from the file descriptor so that it can be
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* used on any thread.
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*/
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ret = file_detach(fd, filep);
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if (ret < 0)
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{
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nx_close(fd);
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return ret;
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}
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return OK;
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}
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