[PATCH]: Patch to fix hang on exit bug under Linux and add optional exit delay

[Nicolas Williams]

On Thu, Nov 15, 2001 at 06:04:24PM +0100, Gert Doering wrote:
> hi,
> 
> On Thu, Nov 15, 2001 at 11:56:16AM -0500, Nicolas Williams wrote:
> > On Thu, Nov 15, 2001 at 05:22:58PM +0100, Gert Doering wrote:
> > > On Thu, Nov 15, 2001 at 08:55:07AM -0500, Peter W wrote:
> > > > And the problem with simply killing the ssh client application is?
> > > I assume that you're talking about the *children*, not the ssh client.
> > > 
> > > Problem is: you don't know who they are.
> > 
> > Yes you do: you know their process group and session id. And the pty
> > knows who the current process group is. Kill -HUP the process group of
> > session(s) being abandoned by the client, send HUP to the pty process
> > groups via the ptys still open, close them ptys.
> > 
> > No?
> 
> No.  A program could have done setsid() and started a new process
> group - think of daemons that do all that daemons should do, but forget
> to close stderr (because of stupid programming bugs in binary-only
> software - whatever "not easily fixable" reason there might be).

Of course, yes, but such programs usually dissasociate from their
controlling tty too.

Even if they don't, killing those process groups is *still* worthwhile.

> gert

Cheers,

Nico
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