Adding sysctl varaible into kernel.

Adding sysctl varaible into kernel.

[authn]

Hi,
Does anybody know how to add sysctl variable into kernel ? Maybe there is some 
function or I should change the kernel source?
-- 
Pozdrawiam,
Jan Opacki

Adding sysctl varaible into kernel.

[authn]

Hi,
Does anybody know how to add sysctl variable into kernel ? Maybe there is
some function or I should change the kernel source?

Regards,
apacz

Re: Adding sysctl varaible into kernel.

[Neil Horman]

authn wrote:
> Hi,
> Does anybody know how to add sysctl variable into kernel ? Maybe there is
> some function or I should change the kernel source?
> 
> Regards,
> apacz
register_sysctl_table is the function you are looking for.

-- 
/***************************************************
  *Neil Horman
  *Software Engineer
  *Red Hat, Inc.
  *nhorman@redhat.com
  *gpg keyid: 1024D / 0x92A74FA1
  *http://pgp.mit.edu
  ***************************************************/

Forcing a core dump

[Darío Mariani]

Hello:
   Is it possible to force a running program to generate a core dump. My 
problem is that I have a program that, from time to time, it freezes and 
I want to know what's going on.
   Thanks,

		Darío
-
To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Forcing a core dump

[Eric Bambach]

On Friday 20 August 2004 11:12 am, Darío Mariani wrote:
> Hello:
>    Is it possible to force a running program to generate a core dump. My
> problem is that I have a program that, from time to time, it freezes and
> I want to know what's going on.

	Others may correct me if I'm wrong, however if you issue a SIGSTOP or SIGKILL 
most programs will coredump will they not? You have to enable core dumping in 
your environment using ulimit -c (number in KB).
	Plus you should be able to attach gdb if its been compiled with debugging 
symbols, and even if it hasn't you will still get some debug control.
-- 

-EB
-
To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Forcing a core dump

[Steven Smith]

[-- Attachment #1: Type: text/plain, Size: 464 bytes --]

>   Is it possible to force a running program to generate a core dump. My 
> problem is that I have a program that, from time to time, it freezes and 
> I want to know what's going on.
If it's still attached to its terminal, Control-\ usually works.
Failing that, try kill -QUIT <pid_of_your_program>.

Steven Smith,
sos22@cantab.net.
-- 
One day, I'm going to get an Alice-bot to answer all my email for me,
and see how long it takes people to notice.

[-- Attachment #2: Type: application/pgp-signature, Size: 187 bytes --]

Re: Forcing a core dump

[Jan-Benedict Glaw]

[-- Attachment #1: Type: text/plain, Size: 986 bytes --]

On Fri, 2004-08-20 13:12:37 -0300, Darío Mariani <dmarian@fi.uba.ar>
wrote in message <412622F5.2080208@fi.uba.ar>:
> Hello:
>   Is it possible to force a running program to generate a core dump. My 
> problem is that I have a program that, from time to time, it freezes and 
> I want to know what's going on.

SIGABRT is ment to do exactly that. However, "ulimit" must allow for the
core to be created and core dumps won't work with multi-threaded
programs (I heared rumors that this was changed in 2.6.x).

Also, in cases of a freeze, attaching a debugger (gdb) might help as
much:

$ gdb /path/to/your/program `pidof program`

MfG, JBG

-- 
Jan-Benedict Glaw       jbglaw@lug-owl.de    . +49-172-7608481             _ O _
"Eine Freie Meinung in  einem Freien Kopf    | Gegen Zensur | Gegen Krieg  _ _ O
 fuer einen Freien Staat voll Freier Bürger" | im Internet! |   im Irak!   O O O
ret = do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA));

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]