819ebe7356
Add flockfile(), ftrylockfile() and funlockfile() functions [1].
[1] POSIX.1-2008 / System Interfaces / flockfile
https://pubs.opengroup.org/onlinepubs/9699919799.2008edition/functions/flockfile.html
Signed-off-by: Miguel Herranz <miguel@midokura.com>
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_rewind.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdio.h>
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#include "libc.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: rewind
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****************************************************************************/
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void rewind(FAR FILE *stream)
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{
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/* Verify that we were provided with a stream */
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if (!stream)
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{
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set_errno(EBADF);
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return;
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}
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flockfile(stream);
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fseek(stream, 0L, SEEK_SET);
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stream->fs_flags &= ~__FS_FLAG_ERROR;
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funlockfile(stream);
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}
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