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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* 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
int _EXFUN(fileno, (FILE *));
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 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;
}
if (std_console) return fileno(std_console);
return -1;
}
int libc_stdio_get_console(void) {
if (std_console)
return fileno(std_console);
else
return -1;
}
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