Re: [Qemu-devel] [PATCH 2/3] Always use nonblocking mode for qemu_chr_open_fd.

["Daniel P. Berrange" <berrange@redhat.com>]

On Wed, Jul 23, 2008 at 02:52:09PM +0200, Gerd Hoffmann wrote:
> Daniel P. Berrange wrote:
> > On Wed, Jul 23, 2008 at 01:48:14PM +0200, Gerd Hoffmann wrote:
> >> Daniel P. Berrange wrote:
> >>
> >>> In the case of the PTY backend, the only time I'd expect data to be dropped
> >>> is if there was no active slave open. If an application has the PTY open
> >>> and is interacting, then I'd want to get all data.  
> >> Yep, that would be most useful (and also matches what is done for tcp
> >> for example).  Now the interesting question is:  How can qemu figure (in
> >> a portable way) whenever there is some process listening on the slave side?
> > 
> > Well you get SIGHUP when the slave side closes, but the problem is then
> > detecting the re-connect.
> 
> I don't see a SIGHUP.

Of course I meant POLLHUP not SIGHUP ...

Daniel
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