81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2017/10/15 bernard the first version
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <rtthread.h>
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#include "libc.h"
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#define STDIO_DEVICE_NAME_MAX 32
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int _EXFUN(fileno, (FILE *));
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static FILE* std_console = NULL;
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int libc_stdio_set_console(const char* device_name, int mode)
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{
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FILE *fp;
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char name[STDIO_DEVICE_NAME_MAX];
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char *file_mode;
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snprintf(name, sizeof(name) - 1, "/dev/%s", device_name);
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name[STDIO_DEVICE_NAME_MAX - 1] = '\0';
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if (mode == O_RDWR) file_mode = "r+";
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else if (mode == O_WRONLY) file_mode = "wb";
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else file_mode = "rb";
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fp = fopen(name, file_mode);
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if (fp)
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{
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setvbuf(fp, NULL, _IONBF, 0);
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if (std_console)
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{
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fclose(std_console);
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std_console = NULL;
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}
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std_console = fp;
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if (mode == O_RDWR)
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{
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_GLOBAL_REENT->_stdin = std_console;
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}
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else
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{
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_GLOBAL_REENT->_stdin = NULL;
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}
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if (mode == O_RDONLY)
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{
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_GLOBAL_REENT->_stdout = NULL;
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_GLOBAL_REENT->_stderr = NULL;
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}
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else
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{
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_GLOBAL_REENT->_stdout = std_console;
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_GLOBAL_REENT->_stderr = std_console;
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}
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_GLOBAL_REENT->__sdidinit = 1;
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}
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if (std_console) return fileno(std_console);
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return -1;
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}
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int libc_stdio_get_console(void) {
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if (std_console)
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return fileno(std_console);
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else
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return -1;
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}
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