Re: close(2) not being audited?

Alexander Viro
2007-01-26T23:20:51Z

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.