PRB: Creating File with Exclusive Access Allows Concurrent Use

ID: Q86723

The information in this article applies to:

Microsoft Windows Software Development Kit (SDK) 3.1

SYMPTOMS

When an application calls the OpenFile() API and specifies the OF_CREATE and OF_SHARE_EXCLUSIVE flags, the created file is not open for exclusive access. Another application can also open the file.

RESOLUTION

To create a file and open it for exclusive access, an application must create the file, close the file, and open it for exclusive access.

MORE INFORMATION

OpenFile() passes its parameters to MS-DOS Interrupt 21h. OpenFile() and Interrupt 21 exhibit the same behavior in this regard.

Additional query words: 3.10 no32bit

Keywords : kb16bitonly
Version : WINDOWS:3.1
Platform : WINDOWS
Issue type :