58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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* File : syscall_read.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2015-01-28 Bernard first version
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*/
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#include <rtthread.h>
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#ifdef RT_USING_DFS
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#include <dfs_posix.h>
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#endif
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#include <yfuns.h>
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#include "libc.h"
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#pragma module_name = "?__read"
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size_t __read(int handle, unsigned char *buf, size_t len)
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{
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#ifdef RT_USING_DFS
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int size;
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#endif
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if (handle == _LLIO_STDIN)
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{
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#ifdef RT_USING_POSIX
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return libc_stdio_read(buf, len);
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#else
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return _LLIO_ERROR;
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#endif
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}
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if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
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return _LLIO_ERROR;
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#ifndef RT_USING_DFS
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return _LLIO_ERROR;
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#else
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size = read(handle, buf, len);
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return size;
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#endif
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}
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