On Fri, 26 Jan 2007 18:20:51 -0500
Alexander Viro <aviro(a)redhat.com> wrote:
On Fri, Jan 26, 2007 at 05:01:12PM -0600, Timothy R. Chavez wrote:
> > Please, define "access". Consider the following sequence:
> > on April 1st:
> > fd = open(foo, O_RDWR);
> > p = mmap(..., fd, ...);
> > close(fd);
> > two days later: modify area pointed to by p
> > a month later: munmap(p, ...);
> >
> > What do you want in the log? More specifically, _when_ do you want it?
>
> Write out a log when the last reference to the fd is put back... whether
> that's from a close or an munmap.
Sigh... One more time: there are two distinct classes of objects - opened
files and opened descriptors. That's the point - by the time of munmap()
there is no file descriptor at all. It's been gone for a month.
Descriptor getting closed != file getting closed. If you are talking about
the last reference to opened file - OK. But there won't necessary be
any descriptors refering to it.
Yep, I was referring to last reference to opened file.
I'd hate to suggest adding a field to the file like "opened_as" which would
store the original fd it was assigned, but that would be enough to associate
the open() record and the final "close" record.
-tim
PS: Ugh, at this list for being write-protected :).