打开共享文件时出现问题。 [英] Problem while opening a shared file.

问题描述

您好，对不起基本问题。我需要在内核模式下创建一个用于写访问的文件，并允许其他线程读取它，这可以同时发生。这就是我在创建文件时所做的事情。

Hello, Sorry for the basic question. I need to create a file for write access in kernel mode and and allow other thread to read it, this can happen simultaneously. so This what I do when creating the file.

    status = ZwCreateFile(&hfile,
                        GENERIC_WRITE,
                        &oa,
                        &iostatus,
                        NULL,
                        FILE_ATTRIBUTE_NORMAL,
                        FILE_SHARE_READ,
                        FILE_OVERWRITE_IF,
                        FILE_SYNCHRONOUS_IO_NONALERT,
                        NULL,
                        0);

}

效果很好，文件创建用于写入，稍后当我尝试创建另一个句柄来阅读它我总是得到STATUS_SHARING_VIOLATION

这是我的工作方式。

works well, the file is created for write and later when I try to create another handle to read it I always get "STATUS_SHARING_VIOLATION"
here is how I do it.

ntstatus = ZwCreateFile(&OriFileHandle,
							FILE_READ_DATA,
							&objOriAttr,
							&ioOriStatusBlock,
							NULL,
							FILE_ATTRIBUTE_NORMAL,
							FILE_SHARE_READ,
							FILE_OPEN,
							FILE_SYNCHRONOUS_IO_NONALERT | FILE_NON_DIRECTORY_FILE,
							NULL,
							0);

有谁可以告诉我，我做错了什么？



我尝试了什么：



我已经阅读过关于ZwCreatefile以及如何共享文件以供其他线程访问但我仍然收到该错误。

Can anybody tell me what is it that I am doing wrong?

What I have tried:

I already read about ZwCreatefile and how to share a file for access by other thread but I am still getting that error.

推荐答案

看起来你正在混合访问标志与其他r种标志。另外，你在第二个ZwCreateFile中省略了FILE_SHARE_WRITE。



试试这个：

It looks like you are mixing access flags with other types of flags. Also, you omit FILE_SHARE_WRITE in the second ZwCreateFile.

Try this:

ntstatus = ZwCreateFile(&OriFileHandle,
							GENERIC_READ,
							&objOriAttr,
							&ioOriStatusBlock,
							NULL,
							FILE_ATTRIBUTE_NORMAL,
							FILE_SHARE_WRITE,
							FILE_OPEN,
							FILE_SYNCHRONOUS_IO_NONALERT | FILE_NON_DIRECTORY_FILE, // I've never used these.
							NULL,
							0);

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