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

[Nicolas Williams]

On Thu, Nov 15, 2001 at 07:46:18PM +0100, Markus Friedl wrote:
> On Thu, Nov 15, 2001 at 10:44:51AM -0500, Ed Phillips wrote:
> > I have more of a problem with the case where "I have no processes running
> > in the background and no other child processes of sshd running at all and
> > sshd/ssh fail to exit".  
> 
> On Thu, Nov 15, 2001 at 05:36:29PM +0100, Gert Doering wrote:
> > Which is exactly what I'm talking about.
> 
> On Thu, Nov 15, 2001 at 11:58:26AM -0500, Nicolas Williams wrote:
> > This is some other bug. I've seen it too. It only happens when you used
> > the forwarded agent, forwarded X or, I suspect, any other forwarded port.
> > It happens even if the forwarded ports/agent are not in use.
> 
> no debug output, no test script, seems nobody cares.

I'll get debug output. Possibly tomorrow. I know the drill, ssh -v -v -v
and sshd -d -d -d.

As for testing, it's easy:

hostA: ssh -A hostB
hostB: exit
hostA: <ssh exits>

hostA: ssh -A hostB
hostB: ssh hostC
hostC: exit
hostB: <ssh exits>
hostB: exit
hostA: <ssh hangs>

This with OpenSSH 2.9p2, but one of my colleagues reports that this still
happens with 3.0...

Try the same sort of thing with X11 instead of agent forwarding.

I always get that behaviour, except with X11 forwarding, where the
problem seems to be intermittent.

BTW, this post seems to have been an attempt to patch that particular problem:

http://marc.theaimsgroup.com/?l=openssh-unix-dev&m=99622973723549&w=2

that patch never applied cleanly to OpenSSH 2.9p2.

> -m


Cheers,

Nico
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