Re: [PATCH] emit logging when a process receives a fatal signal

Oleg Verych
2006-11-18T01:26:28Z

On 2006-11-18, Folkert van Heusden wrote:
> Hi,
>
> I found that sometimes processes disappear on some heavily used system
> of mine without any logging. So I've written a patch against 2.6.18.2
> which emits logging when a process emits a fatal signal.

Why not to patch default signal handlers in glibc, to have not only
stderr, but syslog, or /dev/kmsg copy of fatal messages?

> Signed-off-by: Folkert van Heusden <folkert@vanheusden.com>
>
> --- linux-2.6.18.2/kernel/signal.c 2006-11-04 02:33:58.000000000 +0100
> +++ linux-2.6.18.2.new/kernel/signal.c 2006-11-17 15:59:13.000000000 +0100
> @@ -706,6 +706,15 @@
> struct sigqueue * q = NULL;
> int ret = 0;
>
> + if (sig == SIGQUIT || sig == SIGILL || sig == SIGTRAP ||
> + sig == SIGABRT || sig == SIGBUS || sig == SIGFPE ||
> + sig == SIGSEGV || sig == SIGXCPU || sig == SIGXFSZ ||
> + sig == SIGSYS || sig == SIGSTKFLT)
> + {
> + printk(KERN_WARNING "Sig %d send to %d owned by %d.%d (%s)\n",
> + sig, t -> pid, t -> uid, t -> gid, t -> comm);
> + }
> +
> /*
> * fast-pathed signals for kernel-internal things like SIGSTOP
> * or SIGKILL.
>
>
> Folkert van Heusden
>
> www.vanheusden.com/multitail - multitail is tail on steroids. multiple
> windows, filtering, coloring, anything you can think of
> ----------------------------------------------------------------------
> Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com