rt-thread/components/libc/compilers/dlib/syscall_read.c

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/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
* Change Logs:
* Date Author Notes
* 2015-01-28 Bernard first version
*/
#include <rtthread.h>
#ifdef RT_USING_DFS
#include <dfs_posix.h>
#endif
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#include <yfuns.h>
#include "libc.h"
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#pragma module_name = "?__read"
size_t __read(int handle, unsigned char *buf, size_t len)
{
#ifdef RT_USING_DFS
int size;
#endif
if (handle == _LLIO_STDIN)
{
#ifdef RT_USING_POSIX
return read(STDIN_FILENO, buf, len);
#else
return _LLIO_ERROR;
#endif
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}
else if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
{
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return _LLIO_ERROR;
}
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#ifndef RT_USING_DFS
return _LLIO_ERROR;
#else
size = read(handle, buf, len);
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return size;
#endif
}