Re: [PATCH] kernel 2.4.19 & 2.5.38 - coredump sysctl

Andrew Morton (akpm@digeo.com)
Fri, 20 Sep 2002 14:01:31 -0700


Michael Sinz wrote:
>
> coredump name format control via sysctl
>
> Provides for a way to securely move where core files show up and to
> set the name pattern for core files to include the UID, Program,
> Hostname, and/or PID of the process that caused the core dump.

That seems a reasonable thing to want to do.

> ...
> The following format options are available in that string:
>
> %P The Process ID (current->pid)
> %U The UID of the process (current->uid)
> %N The command name of the process (current->comm)
> %H The nodename of the system (system_utsname.nodename)
> %% A "%"
>
> For example, in my clusters, I have an NFS R/W mount at /coredumps
> that all nodes have access to. The format string I use is:
>
> sysctl -w "kernel.core_name_format=/coredumps/%H-%N-%P.core"
>

Does it need to be this fancy? Why not just have:

if (core_name_format is unset)
use "core"
else
use core_name_format/nodename-uid-pid-comm.core

which saves all that string format processing, while giving
people everything they could want?
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