Apache, root, and core files.

["Paul J. Reder" <re...@raleigh.ibm.com>]

I'm trying to debug a customer problem and need a difinitive yes/no answer
to the following question:

Does Apache do anything to disable the generation of core files when Apache is
started as root (even if it changes to another userid)?

This specific customer happens to be on Linux.

Thanks in advance.

-- 
Paul J. Reder
-----------------------------------------------------------
"The strength of the Constitution lies entirely in the determination of each
citizen to defend it.  Only if every single citizen feels duty bound to do
his share in this defense are the constitutional rights secure."
-- Albert Einstein

RE: Apache, root, and core files.

[Austin Gonyou <au...@coremetrics.com>]

It is controlled by both /etc/system and ulimit. This is important to know,
mainly because the only problem was that I had to reset my ulimit.
/etc/system was fine.
Austin

-----Original Message-----
From: root@main.aquanet.co.il [mailto:root@main.aquanet.co.il]On Behalf Of
Eli Marmor
Sent: Monday, November 20, 2000 8:13 AM
To: new-httpd@apache.org
Subject: Re: Apache, root, and core files.


Austin Gonyou wrote:
>
> Check your 'ulimit -a' and see what the size of Cores Is. Corefiles are
> controlled by the OS 90% of the time. If you are on Solaris x86, it's
> possible that it was turned off as a whole in the install. (don't ask why,
> it's a bug. I installed over 100 machines with Sol 7 x86, and found this
> troublesome thing happen from time to time)After changing the ulimit to
> something greater than the availaible memory, or the max size a process
will
> create, I got cores again.

Under Solaris (both SPARC and X86) it is controlled by an attribute
of "/etc/system". Solaris defends itself by preventing root from
generation of core files, and you should change /etc/system to
disable this "feature". You should also take care to the permissions
of the directory where the core file is going to be produced, and
not only to the ulimit. Once I wrote a small patch to allow Apache
to generate core files even under Solaris without modifying
/etc/system, but it is too ugly to be included in the standard tree.
If some of you want it nevertheless, please let me know and I'll
post it.

--
Eli Marmor
marmor@netmask.it
CTO, Founder
Netmask (El-Mar) Internet Technologies Ltd.
__________________________________________________________
Tel.:   +972-9-766-1020          8 Yad-Harutzim St.
Fax.:   +972-9-766-1314          P.O.B. 7004
Mobile: +972-50-23-7338          Kfar-Saba 44641, Israel

Re: Apache, root, and core files.

[Eli Marmor <ma...@elmar.co.il>]

Austin Gonyou wrote:
> 
> Check your 'ulimit -a' and see what the size of Cores Is. Corefiles are
> controlled by the OS 90% of the time. If you are on Solaris x86, it's
> possible that it was turned off as a whole in the install. (don't ask why,
> it's a bug. I installed over 100 machines with Sol 7 x86, and found this
> troublesome thing happen from time to time)After changing the ulimit to
> something greater than the availaible memory, or the max size a process will
> create, I got cores again.

Under Solaris (both SPARC and X86) it is controlled by an attribute
of "/etc/system". Solaris defends itself by preventing root from
generation of core files, and you should change /etc/system to
disable this "feature". You should also take care to the permissions
of the directory where the core file is going to be produced, and
not only to the ulimit. Once I wrote a small patch to allow Apache
to generate core files even under Solaris without modifying
/etc/system, but it is too ugly to be included in the standard tree.
If some of you want it nevertheless, please let me know and I'll
post it.

-- 
Eli Marmor
marmor@netmask.it
CTO, Founder
Netmask (El-Mar) Internet Technologies Ltd.
__________________________________________________________
Tel.:   +972-9-766-1020          8 Yad-Harutzim St.
Fax.:   +972-9-766-1314          P.O.B. 7004
Mobile: +972-50-23-7338          Kfar-Saba 44641, Israel

RE: Apache, root, and core files.

[Austin Gonyou <au...@coremetrics.com>]

Check your 'ulimit -a' and see what the size of Cores Is. Corefiles are
controlled by the OS 90% of the time. If you are on Solaris x86, it's
possible that it was turned off as a whole in the install. (don't ask why,
it's a bug. I installed over 100 machines with Sol 7 x86, and found this
troublesome thing happen from time to time)After changing the ulimit to
something greater than the availaible memory, or the max size a process will
create, I got cores again.
Austin

-----Original Message-----
From: rederpj@raleigh.ibm.com [mailto:rederpj@raleigh.ibm.com]
Sent: Monday, November 20, 2000 7:36 AM
To: new-httpd@apache.org
Subject: Apache, root, and core files.


I'm trying to debug a customer problem and need a difinitive yes/no answer
to the following question:

Does Apache do anything to disable the generation of core files when Apache
is
started as root (even if it changes to another userid)?

This specific customer happens to be on Linux.

Thanks in advance.

--
Paul J. Reder
-----------------------------------------------------------
"The strength of the Constitution lies entirely in the determination of each
citizen to defend it.  Only if every single citizen feels duty bound to do
his share in this defense are the constitutional rights secure."
-- Albert Einstein