54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* 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>
|
|
#include "libc.h"
|
|
|
|
#define DBG_TAG "dlib.syscall_read"
|
|
#define DBG_LVL DBG_INFO
|
|
#include <rtdbg.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)
|
|
{
|
|
#ifdef RT_USING_POSIX
|
|
if (libc_stdio_get_console() < 0)
|
|
{
|
|
LOG_W("Do not invoke standard input before initializing libc");
|
|
return 0;
|
|
}
|
|
return read(STDIN_FILENO, buf, len);
|
|
#else
|
|
return _LLIO_ERROR;
|
|
#endif
|
|
}
|
|
else if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
|
|
{
|
|
return _LLIO_ERROR;
|
|
}
|
|
|
|
#ifndef RT_USING_DFS
|
|
return _LLIO_ERROR;
|
|
#else
|
|
size = read(handle, buf, len);
|
|
return size;
|
|
#endif
|
|
}
|