Re: How to open files a process has mmapped

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

> a file a process has mmap-ed.  The trouble is that the file might be 
> deleted (this is actually likely in this scenario) so I can't just open 
> the file listed in /proc/<pid>/maps.

Well perhaps they should not have deleted it

> I have looked some at this, and I haven't come up with a good solution 
> for this.  I have come up with the following solutions:

You forgot fix the program to do sensible things. You can pass file handles
over AF_UNIX sockets for example, or you could rename the file so you can
find it then delete it later

> The last solution I could think of was to provide a way to open a file 
> with using the major/minor/inode (since these are listed for the mapped 
> files in the /proc/<pid>/maps file).  This is kind of ugly, but it's 
> probably the best one I've thought of.

Nice way to do security holes