C++ : Opening a file in non exclusive mode

Question

I have to develop an application which parses a log file and sends specific data to a server. It has to run on both Linux and Windows.

The problem appears when I wa

Answer 1

If you are only reading from the file I know it can be done with windows api CreateFile. Just specify FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE as the input to dwShareMode.

Unfortunally this is not crossplatform. But there might be something similar for Linux.

See msdn for more info on CreateFile.

EDIT: Just a quick note about Greg Hewgill comment. I've just tested with the FILE_SHARE* stuff (too be 100% sure). And it is possible to both delete and rename files in windows if you open read only and specify the FILE_SHARE* parameters.