73 lines
1.2 KiB
C
73 lines
1.2 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>
|
|
#include <yfuns.h>
|
|
#include <fcntl.h>
|
|
|
|
#pragma module_name = "?__open"
|
|
|
|
int __open(const char *filename, int mode)
|
|
{
|
|
#ifdef RT_LIBC_USING_FILEIO
|
|
int handle;
|
|
int open_mode = O_RDONLY;
|
|
|
|
if (mode & _LLIO_CREAT)
|
|
{
|
|
open_mode |= O_CREAT;
|
|
|
|
/* Check what we should do with it if it exists. */
|
|
if (mode & _LLIO_APPEND)
|
|
{
|
|
/* Append to the existing file. */
|
|
open_mode |= O_APPEND;
|
|
}
|
|
|
|
if (mode & _LLIO_TRUNC)
|
|
{
|
|
/* Truncate the existsing file. */
|
|
open_mode |= O_TRUNC;
|
|
}
|
|
}
|
|
|
|
if (mode & _LLIO_TEXT)
|
|
{
|
|
/* we didn't support text mode */
|
|
}
|
|
|
|
switch (mode & _LLIO_RDWRMASK)
|
|
{
|
|
case _LLIO_RDONLY:
|
|
break;
|
|
|
|
case _LLIO_WRONLY:
|
|
open_mode |= O_WRONLY;
|
|
break;
|
|
|
|
case _LLIO_RDWR:
|
|
/* The file should be opened for both reads and writes. */
|
|
open_mode |= O_RDWR;
|
|
break;
|
|
|
|
default:
|
|
return _LLIO_ERROR;
|
|
}
|
|
|
|
handle = open(filename, open_mode, 0);
|
|
if (handle < 0)
|
|
return _LLIO_ERROR;
|
|
|
|
return handle;
|
|
#else
|
|
return _LLIO_ERROR;
|
|
#endif /* RT_LIBC_USING_FILEIO */
|
|
}
|