unamei.c

该项目主要是将wingdows程序直接运行在linux上

/*
 * unamei.c
 *
 * Copyright (C) 2006  Insigme Co., Ltd
 *
 * Authors: 
 * - Lixing Chu
 *
 * This software has been developed while working on the Linux Unified Kernel
 * project (http://linux.insigma.com.cn) in the Insigma Reaserch Institute,  
 * which is a subdivision of Insigma Co., Ltd (http://www.insigma.com.cn).
 * 
 * The project is sponsored by Insigma Co., Ltd.
 *
 * The authors can be reached at [e-mail].
 *
 * 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.
 *
 * Revision History:
 *   Jan 2006 - Created.
 */
 
/*
 * unamei.c: extend namei.c for wchar
 * Reference to Linux kernel code
 */

#include <linux/module.h>
#include <linux/fs.h>
#include <linux/nls.h>
#include <asm/uaccess.h>
#include "win32.h"
#include <linux/module.h>

#ifdef CONFIG_UNIFIED_KERNEL

extern long wstrncpy_from_user(wchar_t *, const wchar_t *, long);
extern void putwname(const wchar_t *);

static inline int do_getwname(const wchar_t __user *wname, wchar_t *page)
{
	int retval;
	unsigned long len = PATH_MAX;

	if (!segment_eq(get_fs(), KERNEL_DS)) {
		if ((unsigned long) wname >= TASK_SIZE)
			return -EFAULT;
		if (TASK_SIZE - (unsigned long) wname < PATH_MAX)
			len = TASK_SIZE - (unsigned long) wname;
	}

	retval = wstrncpy_from_user(page, wname, len);
	if (retval > 0) {
		if (retval < len)
			return 0;
		return -ENAMETOOLONG;
	} else if (!retval)
		retval = -ENOENT;
	return retval;
} /* end do_getwname() */

wchar_t *getwname(const wchar_t __user *wname)
{
	wchar_t *tmp, *result;

	result = ERR_PTR(-ENOMEM);
	tmp = __getname();
	if (tmp)  {
		int retval = do_getwname(wname, tmp);
		result = tmp;
		if (retval < 0) {
			putwname(tmp);
			result = ERR_PTR(retval);
		}
	}
	return result;
} /* end getwname() */


void putwname(const wchar_t *wname)
{
	__putname(wname);
} /* end putwname */
#endif