Re: epoll and shared fd's

[Davide Libenzi <davidel@xmailserver.org>]

On Thu, 28 Feb 2008, Valdis.Kletnieks@vt.edu wrote:

> On Tue, 26 Feb 2008 19:16:30 +0100, Bodo Eggert said:
> > Michael Kerrisk <mtk.manpages@googlemail.com> wrote:
> 
> > >               file  handle  have  been  closed.  This means that
> > >               even after a file descriptor that is  part  of  an
> > >               epoll  set has been closed, events may be reported
> > >               for that file descriptor if other file descriptors
> > >               referring  to the same underlying file description
> > >               remain open.
> 
> Is it worth making special mention of the case where a process gets events
> for a FD that it has closed, because a parent or child process still has
> an inherited copy of the FD still open?

And for all the others, there's epoll_ctl(EPOLL_CTL_DEL) :)
The close(2) (f_op->release actually) hook is for cleanup semantics. If 
you play with multiple processes, just use epoll_ctl(EPOLL_CTL_DEL) and 
you'll be fine.



- Davide