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9e141acab3
Align the NuttX open(2) flag constants with the Linux asm-generic values so that the FUSE wire protocol and other cross-platform interfaces work without conversion. All code that used '(flags & O_RDONLY)' as a bitmask check (always 0 now that O_RDONLY=0) has been updated to use '(flags & O_ACCMODE)' comparisons. The NUTTX_O_* constants in include/nuttx/fs/hostfs.h are updated to match, and the sim hostfs open flag mapping is fixed. Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/****************************************************************************
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* libs/libc/stdio/lib_ungetc.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <fcntl.h>
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#include <errno.h>
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#include <nuttx/fs/fs.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: ungetc
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****************************************************************************/
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int ungetc(int c, FAR FILE *stream)
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{
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#if CONFIG_NUNGET_CHARS > 0
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int nungotten;
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#endif
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/* Verify that a non-NULL stream was provided and c is not EOF */
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if (!stream || c == EOF)
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{
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return EOF;
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}
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/* Stream must be open for read access */
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if ((stream->fs_oflags & O_ACCMODE) == O_WRONLY)
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{
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return EOF;
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}
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#if CONFIG_NUNGET_CHARS > 0
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nungotten = stream->fs_nungotten;
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if (stream->fs_nungotten < CONFIG_NUNGET_CHARS)
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{
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stream->fs_ungotten[nungotten] = c;
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stream->fs_nungotten = nungotten + 1;
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return c;
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}
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else
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#endif
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{
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return EOF;
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}
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}
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