Date: Thu, 6 Jan 2000 23:02:07 +0100 (CET) From: Oliver Fromme <olli@dorifer.heim3.tu-clausthal.de> To: freebsd-questions@FreeBSD.ORG Subject: Re: login classes info Message-ID: <200001062202.XAA33020@dorifer.heim3.tu-clausthal.de> In-Reply-To: <8522ol$2vpm$1@atlantis.rz.tu-clausthal.de>
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Sue Blake <sue@ahimsa.welearn.com.au> wrote in list.freebsd-questions: > Is there anything I can read to expand on what I've already read > in the man pages? Perhaps a more verbose How-To or explanation of > some terms? For example, terms like "datasize" don't have a lot > of meaning right now and I might be missing out on some useful ways > to tweak the login.conf file. "Datasize" is the size of the data segment of a process (i.e. its variable data). Basically, the amount of memory it can malloc (simply speaking). This is opposed to the "textsize" of a process, which is its actual program code, and the "stack- size" which is used for storing local variables and return addresses of functions. To be honest, I don't know where these terms are explained. I think I've read about them in a book about UNIX programming. The getrlimit(2) manpage says about "datasize": ``The maximum size of the data segment for a process; this defines how far a program may extend its break with the sbrk(2) system call.'' Admittedly, this explanation is not very useful by itself. Regards Oliver -- Oliver Fromme, Leibnizstr. 18/61, 38678 Clausthal, Germany (Info: finger userinfo:olli@dorifer.heim3.tu-clausthal.de) "In jedem Stück Kohle wartet ein Diamant auf seine Geburt" (Terry Pratchett) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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