99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/************************************************************
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* lib_fclose.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 Gregory Nutt 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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* Compilation Switches
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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 <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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/************************************************************
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* Global Functions
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************************************************************/
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#if CONFIG_NFILE_STREAMS > 0
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int fclose(FILE *stream)
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{
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int ret = OK;
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if (stream)
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{
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if (stream->fs_filedes > 0)
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{
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ret = close(stream->fs_filedes);
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}
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#warning REVIEW for race conditions
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#if CONFIG_STDIO_BUFFER_SIZE > 0
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/* Destroy the semaphore */
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sem_destroy(&stream->fs_sem);
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/* release the buffer */
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if (stream->fs_bufstart)
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{
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free(stream->fs_bufstart);
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}
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/* Clear the whole structure */
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memset(stream, 0, sizeof(FILE));
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#else
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#if CONFIG_NUNGET_CHARS > 0
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/* Reset the number of ungetc characters */
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stream->fs_nungotten = 0;
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#endif
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/* Reset the flags */
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stream->fs_oflags = 0;
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#endif
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/* Setting the fs_filedescriptor to -1 makes the stream available for reuse */
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stream->fs_filedes = -1;
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}
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return ret;
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}
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#endif /* CONFIG_NFILE_STREAMS */
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