On Thu, Jun 06, 2002 at 10:09:39AM -0500, Patrick Dughi wrote: >> On Tuesday 04 June 2002 10:16 pm, Mythran wrote: >> > Every time my mud has crashed with no error messages, except for >> > Sigmentation Faults, there is no core made...:( >> > >> > Anyone ran into this before? I am running RedHat Linux 7.2 with >> > Circle30bpl17 with all the fixins (code is modified). >> > >> > Mythran >> >> Add 'ulimit -c unlimited' to your runscript(or wherever it'll be run before >> the mudserver) > > One or two things to note: depending on your installation, your >ulimit is set within the default login scripts (located in /etc usually, >as things like csh.login, or cshrc, for c shell). That's great, and works >because the login process is running with root priveleges. > > This is important, because just like nice, you cannot (in most >situations) raise your ulimits, only decrease them. > > So, unless you run your mud as root, you may not be able to >backwards-adjust your ulimit TO unlimited. Implementation specific, of >course (depends on hard and soft limits). > > Oh, and if you run your mud as root, you're a moron, and I'm not >even going to bother to explain. > > PjD The easiest way I know around it is to do one of two things: $ ulimit -c `ulimit -Hc` # set soft coresize limit to hard limit. (those are back-quotes) or something like: struct rlimit &rlim; getrusage(RLIM_CORE, &rlim); setrusage(RLIM_CORE, &rlim); in the startup code somewhere (but if I remember, that didn't work right.) You're mostly right though. If the startup scripts set, say, a 15M hard coresize limit and you try to "ulimit -c unlimited" it'll fail. As for running as root, I agree, you're a moron if you do. But if it's ABSOLUTELY necessary (for whatever reason I can't fathom... maybe you hafta sneak it in on some low port on the server?) then there had REALLY damn well better be some setuid/gid()'s to drop to an unprivileged user as soon as whatever you need root for is done with. -Mike -- +---------------------------------------------------------------+ | FAQ: http://qsilver.queensu.ca/~fletchra/Circle/list-faq.html | | Archives: http://post.queensu.ca/listserv/wwwarch/circle.html | | Newbie List: http://groups.yahoo.com/group/circle-newbies/ | +---------------------------------------------------------------+
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