SIGTERM is not killing udhcpc

[Bryan Evenson]

Laurent,

> -----Original Message-----
> From: busybox-bounces at busybox.net [mailto:busybox-
> bounces at busybox.net] On Behalf Of Laurent Bercot
> Sent: Wednesday, May 21, 2014 3:00 PM
> To: busybox at busybox.net
> Subject: Re: SIGTERM is not killing udhcpc
> 
> 
> > On my system I modified networking/ifupdown.c to call "kill -9" instead of
> "kill" to kill udhcpc (lines 539 and 617) and now udhcpc stops as expected
> when I bring the related interface down.  However, I've been through
> networking/udhcp/dhcpc.c and I don't see any obvious reason why it won't
> respond to a standard kill command.  Anyone see a reason why this would
> happen?
> 
>   Can you please strace udhcpc, then send it a SIGTERM, and post the output
> of the strace ? It will show where udhcpc is blocking after receiving the signal.
> 

Of course now I can't reproduce the problem.  On my system the only thing that I changed with Busybox was adding "kill -9" to ifdown, which doesn't change any of the udhcpc code but a standard kill will now bring down udhcpc.  I have a separate machine that was running the same version of Busybox before my patch and SIGTERM kills udhcpc on that machine.  The only time I was able to produce the problem is on a machine that no longer exhibits the problem.

Unless I can reproduce the problem I'm going to assume that there was some unreproducible oddity with my machine that has now been fixed by reinstalling Busybox.  Sorry for the noise.

Bryan

> --
>   Laurent
> 
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