<!-- MHonArc v2.4.4 --> <!--X-Subject: Re: [MUD-Dev] about MOO --> <!--X-From-R13: Uert [vyyre <tzvyyreNpynffvp-tnzrf.pbz> --> <!--X-Date: Mon, 22 Nov 1999 12:14:44 -0800 --> <!--X-Message-Id: 3839A2EA.A836A90@classic-games.com --> <!--X-Content-Type: text/plain --> <!--X-Reference: Pine.LNX.4.03.9911212136110.29075-100000#andru,sonoma.edu --> <!--X-Head-End--> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <title>MUD-Dev message, Re: [MUD-Dev] about MOO</title> <!-- meta name="robots" content="noindex,nofollow" --> <link rev="made" href="mailto:gmiller#classic-games,com"> </head> <body background="/backgrounds/paperback.gif" bgcolor="#ffffff" text="#000000" link="#0000FF" alink="#FF0000" vlink="#006000"> <font size="+4" color="#804040"> <strong><em>MUD-Dev<br>mailing list archive</em></strong> </font> <br> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] <br clear=all><hr> <!--X-Body-Begin--> <!--X-User-Header--> <!--X-User-Header-End--> <!--X-TopPNI--> Date: [ <a href="msg00446.html">Previous</a> | <a href="msg00448.html">Next</a> ] Thread: [ <a href="msg00438.html">Previous</a> | <a href="msg00405.html">Next</a> ] Index: [ <A HREF="author.html#00447">Author</A> | <A HREF="#00447">Date</A> | <A HREF="thread.html#00447">Thread</A> ] <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> <H1>Re: [MUD-Dev] about MOO</H1> <HR> <!--X-Subject-Header-End--> <!--X-Head-of-Message--> <UL> <LI><em>To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI> <LI><em>Subject</em>: Re: [MUD-Dev] about MOO</LI> <LI><em>From</em>: Greg Miller <<A HREF="mailto:gmiller#classic-games,com">gmiller#classic-games,com</A>></LI> <LI><em>Date</em>: Mon, 22 Nov 1999 14:09:14 -0600</LI> <LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI> <LI><em>Sender</em>: <A HREF="mailto:mud-dev-admin#kanga,nu">mud-dev-admin#kanga,nu</A></LI> </UL> <!--X-Head-of-Message-End--> <!--X-Head-Body-Sep-Begin--> <HR> <!--X-Head-Body-Sep-End--> <!--X-Body-of-Message--> <PRE> Andru Luvisi wrote: > Put simply: Whenever an object tries to do something restricted (ie read > or write a file) your validator function (part of the mudlib in the two > implementations I'm familiar with, Nightmare/Foundation and TubMud) > examines the current call stack (the same one you'd see if you did a > backtrace). The functions don't matter, only the objects. If *all* of > the objects have the needed access, then the operation succeeds. If *any* > of them fail, the operation fails. The only time the procedure is > different is if an object specifically chooses to have *only* its access > used for making the decision. In the implementations I've seen, there This basically amounts to a capability system... Do a web search for "capability system" and "eros" for a fairly detailed discussion of why this approach works pretty well in many situations. (Eros is an operating system that uses capabilities for its security rather than user accounts). -- <A HREF="http://www.classic-games.com/">http://www.classic-games.com/</A> Conspiracy theorists mistakenly assume others think before acting. *** Please limit .sigs to four lines and avoid HTML mail or posts. *** _______________________________________________ MUD-Dev maillist - MUD-Dev#kanga,nu <A HREF="http://www.kanga.nu/lists/listinfo/mud-dev">http://www.kanga.nu/lists/listinfo/mud-dev</A> </PRE> <!--X-Body-of-Message-End--> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <!--X-Follow-Ups-End--> <!--X-References--> <UL><LI><STRONG>References</STRONG>: <UL> <LI><STRONG><A NAME="00438" HREF="msg00438.html">Re: [MUD-Dev] about MOO</A></STRONG> <UL><LI><EM>From:</EM> Andru Luvisi <luvisi#andru,sonoma.edu></LI></UL></LI> </UL></LI></UL> <!--X-References-End--> <!--X-BotPNI--> <UL> <LI>Prev by Date: <STRONG><A HREF="msg00446.html">Re: [MUD-Dev] Admins as Mortals twist</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg00448.html">Re: [MUD-Dev] Admins as Mortals twist</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg00438.html">Re: [MUD-Dev] about MOO</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg00405.html">Re: [MUD-Dev] about MOO</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="index.html#00447"><STRONG>Date</STRONG></A></LI> <LI><A HREF="thread.html#00447"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> <ul><li>Thread context: <BLOCKQUOTE><UL> <LI><strong><A NAME="00394" HREF="msg00394.html">[MUD-Dev] about MOO</A></strong>, Ilya, Game Commandos <a href="mailto:Ilya#gamecommandos,com">Ilya#gamecommandos,com</a>, Fri 19 Nov 1999, 18:27 GMT <UL> <LI><strong><A NAME="00404" HREF="msg00404.html">Re: [MUD-Dev] about MOO</A></strong>, Andru Luvisi <a href="mailto:luvisi#andru,sonoma.edu">luvisi#andru,sonoma.edu</a>, Fri 19 Nov 1999, 20:30 GMT <UL> <LI><strong><A NAME="00413" HREF="msg00413.html">Re: [MUD-Dev] about MOO</A></strong>, Joey Hess <a href="mailto:joey#kitenet,net">joey#kitenet,net</a>, Sat 20 Nov 1999, 00:39 GMT <UL> <LI><strong><A NAME="00438" HREF="msg00438.html">Re: [MUD-Dev] about MOO</A></strong>, Andru Luvisi <a href="mailto:luvisi#andru,sonoma.edu">luvisi#andru,sonoma.edu</a>, Mon 22 Nov 1999, 18:55 GMT <UL> <LI><strong><A NAME="00447" HREF="msg00447.html">Re: [MUD-Dev] about MOO</A></strong>, Greg Miller <a href="mailto:gmiller#classic-games,com">gmiller#classic-games,com</a>, Mon 22 Nov 1999, 20:14 GMT </LI> </UL> </LI> </UL> </LI> </UL> </LI> <LI><strong><A NAME="00405" HREF="msg00405.html">Re: [MUD-Dev] about MOO</A></strong>, Dan Root <a href="mailto:dar#thekeep,org">dar#thekeep,org</a>, Fri 19 Nov 1999, 20:30 GMT <UL> <LI><strong><A NAME="00414" HREF="msg00414.html">Re: [MUD-Dev] about MOO</A></strong>, Joey Hess <a href="mailto:joey#kitenet,net">joey#kitenet,net</a>, Sat 20 Nov 1999, 00:39 GMT <UL> <LI><strong><A NAME="00420" HREF="msg00420.html">Re: [MUD-Dev] about MOO</A></strong>, Dan Root <a href="mailto:dar#thekeep,org">dar#thekeep,org</a>, Sat 20 Nov 1999, 01:43 GMT <UL> <LI><strong><A NAME="00428" HREF="msg00428.html">Re: [MUD-Dev] about MOO</A></strong>, bruce <a href="mailto:bruce#puremagic,com">bruce#puremagic,com</a>, Sun 21 Nov 1999, 01:14 GMT </LI> </UL> </LI> </UL> </LI> </UL> </LI> </UL> </LI> </UL></BLOCKQUOTE> </ul> <hr> <center> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] </center> <hr> </body> </html>