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/*
* File : syscall_read.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2015-01-28 Bernard first version
*/
#include <rtthread.h>
#ifdef RT_USING_DFS
#include <dfs_posix.h>
#endif
#include <yfuns.h>
#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)
{
/* TODO */
return 0;
}
if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
return _LLIO_ERROR;
#ifndef RT_USING_DFS
return _LLIO_ERROR;
#else
size = read(handle - _LLIO_STDERR - 1, buf, len);
return size;
#endif
}
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