FileSystemWatcher-目标目录所需的最低权限? [英] FileSystemWatcher - minimum permissions needed on target directories?

问题描述

使用.NET FileSystemWatcher http://msdn.microsoft .com/en-us/library/system.io.filesystemwatcher.aspx 来监视目录中包含以下内容的文件:已更改；已更改.已创建；已删除；重命名事件.

Using the .NET FileSystemWatcher http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.aspx to monitor a directory full of files for : Changed; Created; Deleted; Renamed events .

运行FileSystemWatcher的帐户对其所监视的目录所拥有的最低权限是多少?

What's the minimum the rights the Account running the FileSystemWatcher needs over the directory it's watching ?

似乎应该是READ，但我在任何地方都找不到该文件.

It seems like it would be READ but I can't find that documented anywhere.

谢谢

推荐答案

基础API是ReadDirectoryChangesW. MSDN Library文章中唯一提到的是目录句柄需要FILE_LIST_DIRECTORY访问权限，并且需要使用FILE_FLAG_BACKUP_SEMANTICS选项打开目录.

The underlying API is ReadDirectoryChangesW. The only thing mentioned in the MSDN Library article for it is that the FILE_LIST_DIRECTORY access right is required on the directory handle and the directory needs to be opened with the FILE_FLAG_BACKUP_SEMANTICS option.

.NET框架代码通常很有帮助.私有FileSystemWatcher.StartRaisingEvents()方法使用以下代码打开目录句柄:

The .NET framework code is often helpful. The private FileSystemWatcher.StartRaisingEvents() method uses this code to open the directory handle:

directoryHandle = NativeMethods.CreateFile(
    directory,                                 // Directory name
    UnsafeNativeMethods.FILE_LIST_DIRECTORY,   // access (read-write) mode
    UnsafeNativeMethods.FILE_SHARE_READ |
    UnsafeNativeMethods.FILE_SHARE_DELETE |
    UnsafeNativeMethods.FILE_SHARE_WRITE,      // share mode
    null,                                      // security descriptor
    UnsafeNativeMethods.OPEN_EXISTING,         // how to create
    UnsafeNativeMethods.FILE_FLAG_BACKUP_SEMANTICS |
    UnsafeNativeMethods.FILE_FLAG_OVERLAPPED,  // file attributes
    new SafeFileHandle(IntPtr.Zero, false));   // file with attributes to copy

仅将FILE_FLAG_OVERLAPPED用于异步通知.

Use FILE_FLAG_OVERLAPPED only for asynchronous notifications.

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