86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
|
/*
|
||
|
|
* File : stdio.c
|
||
|
|
* Brief : stdio for newlib
|
||
|
|
*
|
||
|
|
* This file is part of RT-Thread RTOS
|
||
|
|
* COPYRIGHT (C) 2006 - 2017, 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
|
||
|
|
* 2017/10/15 bernard the first version
|
||
|
|
*/
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
|
||
|
|
#include <rtthread.h>
|
||
|
|
#include "libc.h"
|
||
|
|
|
||
|
|
#define STDIO_DEVICE_NAME_MAX 32
|
||
|
|
|
||
|
|
static FILE* std_console = NULL;
|
||
|
|
|
||
|
|
int libc_stdio_set_console(const char* device_name, int mode)
|
||
|
|
{
|
||
|
|
FILE *fp;
|
||
|
|
char name[STDIO_DEVICE_NAME_MAX];
|
||
|
|
char *file_mode;
|
||
|
|
|
||
|
|
snprintf(name, sizeof(name) - 1, "/dev/%s", device_name);
|
||
|
|
name[STDIO_DEVICE_NAME_MAX - 1] = '\0';
|
||
|
|
|
||
|
|
if (mode == O_RDWR) file_mode = "r+";
|
||
|
|
else if (mode == O_WRONLY) file_mode = "wb";
|
||
|
|
else if (mode == O_RDONLY) file_mode = "rb";
|
||
|
|
|
||
|
|
fp = fopen(name, file_mode);
|
||
|
|
if (fp)
|
||
|
|
{
|
||
|
|
setvbuf(fp, NULL, _IONBF, 0);
|
||
|
|
|
||
|
|
if (std_console)
|
||
|
|
{
|
||
|
|
fclose(std_console);
|
||
|
|
std_console = NULL;
|
||
|
|
}
|
||
|
|
std_console = fp;
|
||
|
|
|
||
|
|
if (mode == O_RDWR)
|
||
|
|
{
|
||
|
|
_GLOBAL_REENT->_stdin = std_console;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
_GLOBAL_REENT->_stdin = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (mode == O_RDONLY)
|
||
|
|
{
|
||
|
|
_GLOBAL_REENT->_stdout = NULL;
|
||
|
|
_GLOBAL_REENT->_stderr = NULL;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
_GLOBAL_REENT->_stdout = std_console;
|
||
|
|
_GLOBAL_REENT->_stderr = std_console;
|
||
|
|
}
|
||
|
|
|
||
|
|
_GLOBAL_REENT->__sdidinit = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return fileno(std_console);
|
||
|
|
}
|