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/*
* 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>
#include <yfuns.h>
#include <unistd.h>
#include "libc.h"
#define DBG_TAG "dlib.syscall_write"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#pragma module_name = "?__write"
size_t __write(int handle, const unsigned char *buf, size_t len)
{
#ifdef RT_LIBC_USING_FILEIO
int size;
#endif /* RT_LIBC_USING_FILEIO */
if ((handle == _LLIO_STDOUT) || (handle == _LLIO_STDERR))
{
#ifdef RT_LIBC_USING_FILEIO
if (libc_stdio_get_console() < 0)
{
LOG_W("Do not invoke standard output before initializing libc");
return 0;
}
return write(STDOUT_FILENO, (void*)buf, len);
#elif defined(RT_USING_CONSOLE)
rt_device_t console_device;
console_device = rt_console_get_device();
if (console_device != 0)
{
rt_device_write(console_device, 0, buf, len);
}
return len;
#else
return _LLIO_ERROR;
#endif /* RT_LIBC_USING_FILEIO */
}
else if (handle == _LLIO_STDIN)
{
return _LLIO_ERROR;
}
#ifdef RT_LIBC_USING_FILEIO
size = write(handle, buf, len);
return size;
#else
return _LLIO_ERROR;
#endif /* RT_LIBC_USING_FILEIO */
}
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