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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!news.sdsmt.edu!news.mid.net!sbctri.tri.sbc.com!newspump.wustl.edu!news.ecn.bgu.edu!vixen.cso.uiuc.edu!howland.erols.net!news.mathworks.com!fu-berlin.de!news.belwue.de!news.belwue.de!news.uni-kl.de!rz.uni-karlsruhe.de!not-for-mail From: uk1o@rzstud1.rz.uni-karlsruhe.de (Felix Schroeter) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: enabling core dumps Date: 13 Oct 1996 15:02:38 +0200 Organization: University of Karlsruhe, Germany Lines: 23 Message-ID: <53qp9f$1bj@rzstud1.rz.uni-karlsruhe.de> References: <fred-1210960842000001@flourine.shocking.com> NNTP-Posting-Host: rzstud1.rz.uni-karlsruhe.de Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit NNTP-Posting-User: uk1o Hello! In article <fred-1210960842000001@flourine.shocking.com>, Fred Condo <fred@lightside.net> wrote: >What is required to get a failing program to create a core dump? In >particular, I am trying to get Apache to dump core when it fails with a >SEGV. I've checked ulimit -c (it's unlimited), yet Apache won't dump core >on failure. This is under FreeBSD 2.1.0-R. The core dump would be very >useful for debugging Apache's failures. >I wrote a small program that deliberately makes a SEGV, and it dumps core >very nicely. What am I missing? There could be several problems: - Apache could be setuid/setgid. UNIX doesn't dump core, if effective and real [ug]id differ. - Apache can't write to its current directory. - Apache itself disables corecumps with setrlimit(2) - Apache catches SIGSEGV and exits w/o coredump Hope that helps. Regards, Felix.