[Gllug] [OT] Linux question - core dumps

[Chris Wareham]

rich at annexia.org wrote:
> On Sun, Feb 16, 2003 at 09:39:03PM +0000, Chris Wareham wrote:
> 
>>rich at annexia.org wrote:
>>
>>>Sorry to post an off-topic question to this political discussion group ...
>>>
>>>I have a server which is running as 'nobody' (actually it starts running
>>>as root and setuid/setgids to this user). It is running in a directory
>>>called /tmp/cores/ which is 0755, chowned to nobody.nogroup. I've also
>>>called 'ulimit -c unlimited'. Despite this, the server refuses to dump
>>>core if it crashes. This is really annoying because it makes it very
>>>hard to debug the server (it crashes about once every 5 days).
>>>
>>>Any ideas how to force it to dump core???
>>>
>>
>>Add a -d (or similar flag) that tells it not to setuid to nobody. In
>>other words get it to run as the invoking user without disconnecting
>>from the terminal. Then run it as an unprivileged user, and wait for the
>>core dump. I'm assuming that if it can run as nobody, then it can run as
>>any user - or does it bind to a low port or something before dropping
>>privileges? If so, can you recode it to take an optional port argument?
> 
> 
> Unfortunately it needs to bind to port 80.
> 

Can you not setup a minimal proxy to forward the requests to another
port, and have a non-priveleged version of your (HTTP?) daemon running
on that?

Chris
-- 
http://www.btinternet.com/~chris.wareham/


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