Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756440AbWKSHGx (ORCPT ); Sun, 19 Nov 2006 02:06:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756451AbWKSHGx (ORCPT ); Sun, 19 Nov 2006 02:06:53 -0500 Received: from raven.upol.cz ([158.194.120.4]:38062 "EHLO raven.upol.cz") by vger.kernel.org with ESMTP id S1756440AbWKSHGw (ORCPT ); Sun, 19 Nov 2006 02:06:52 -0500 Date: Sun, 19 Nov 2006 07:13:44 +0000 To: Jan Engelhardt Cc: Folkert van Heusden , LKML Subject: Re: [PATCH] emit logging when a process receives a fatal signal Message-ID: <20061119071343.GA16125@flower.upol.cz> References: <20061118010946.GB31268@vanheusden.com> <20061118020200.GC31268@vanheusden.com> <20061118020413.GD31268@vanheusden.com> <20061118023832.GG13827@flower.upol.cz> <20061118215117.GA15686@flower.upol.cz> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.13 (2006-08-11) From: Oleg Verych Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1609 Lines: 34 On Sun, Nov 19, 2006 at 12:24:14AM +0100, Jan Engelhardt wrote: > > On Nov 18 2006 21:51, Oleg Verych wrote: > >On Sat, Nov 18, 2006 at 08:30:02PM +0100, Jan Engelhardt wrote: > >> >Then, who you think prints that "Killed" or "Segmentation fault" > >> >messages in *stderr*? > >> >[Hint: libc's default signal handler (man 2 signal).] > >> > >> Please enlighten us on how you plan to catch the uncatchable SIGKILL. > > > >Here's question of getting information. Collecting information is > >possible by `waitpid()' from parent process as Miquel noted. > > Yes, that is true. However that would involve adding support for This > Situation to the parent process. Which is where it becomes tricky. Patch > /sbin/init, in case the daemon runs like everything else. Or patch > xinetd, in case it is run from within that. Or, ... > The 'problem' with the waitpid solution is that you would need to > patch every possible parent that may become the owner of The Sigkilled > Target. I think this is pure userspace admin issue, one wrapper shell script for not programmers. I'm not sure about init, you've told. For example, in Debian daemons are run by start-stop-daemon function in LSB package. And in proposed LSB standard portable start_daemon, killproc, pidofproc funcions are described. ____ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/