6a3c2aded6
* Simplify EINTR/ECANCEL error handling 1. Add semaphore uninterruptible wait function 2 .Replace semaphore wait loop with a single uninterruptible wait 3. Replace all sem_xxx to nxsem_xxx * Unify the void cast usage 1. Remove void cast for function because many place ignore the returned value witout cast 2. Replace void cast for variable with UNUSED macro
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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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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