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<H1>Re: [MUD-Dev] Mail from mud Update :)</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#null,net">mud-dev#null,net</A></LI>
<LI><em>Subject</em>: Re: [MUD-Dev] Mail from mud Update :)</LI>
<LI><em>From</em>: Shawn Halpenny <<A HREF="mailto:malachai#iname,com">malachai#iname,com</A>></LI>
<LI><em>Date</em>: Wed, 7 Jan 1998 10:48:41 -0500 (EST)</LI>
<LI><em>Reply-To</em>: Shawn Halpenny <<A HREF="mailto:malachai#iname,com">malachai#iname,com</A>></LI>
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<PRE>
On Tue, 6 Jan 1998, JC Lawrence wrote:
> On Sat, 3 Jan 1998 19:18:27 PST8PDT
> Richard Woolcock<KaVir#dial,pipex.com> wrote:
> > Stephen Zepp wrote:
> >> Vadim Tkachenko wrote:
>
> > I'm catching up on xmas mail, so sorry if someone has mentioned this
> > already... try a & on the end of the command within system.
>
> The problem is still getting the return code from the spawned process.
>
> > I use
> > a similar thing to delete player-recognition files - system("rm -f
> > -r ../known/*/Kavir &"); or whatever. I really need to find some
> > effective way to pack info about everyone you know into a single
> > file, yet have a decent way of removing all knowledge of you from
> > everyone elses file when you die...
>
> I suggest using a variation on reference counting where every data node
> keeps a pointer to what that node refers to, what objects know
> about that data node, and objects keep a list of all that data nodes
> that reference that object.
>
> From there its just a matter of iterating across the appropriate lists
> and cleaning up.
What about a simple directed graph (rather inelegantly rendered):
+-----> 1 <-------+
| /|\____ |
| / | \ |
| V V V |
+-- 2 3 <--> 4 -+
^ |
| |
+-----------+
1 knows 2, 3, and 4.
2 knows 1.
3 knows 4.
4 knows 1, 2, and 3.
Now 4 gets killed:
+-----> 1
| /|
| / |
| V V
+-- 2 3
Any number of graph representation data structures exist along with their
manipulation alogorithms (like JCL, I suggest checking out the Stony
Brook repository <A HREF="http://www.cs.sunysb.edu/~algorith/">http://www.cs.sunysb.edu/~algorith/</A> ).
Could be stored in a file. Could even be stored directly in a file
system (probably inode-expensive). In any case, there are multiple
implementations.
For grins in sh:
mkdir -p known/1
mkdir known/2
mkdir known/3
mkdir known/4
# 1 knows 2, 3, 4
ln -s ../2 known/1
ln -s ../3 known/1
ln -s ../4 known/1
# 2 knows 1
ln -s ../1 known/2
# 3 knows 4
ln -s ../4 known/3
# 4 knows 1, 2, 3
ln -s ../1 known/4
ln -s ../2 known/4
ln -s ../3 known/4
# kill 4
rm -r known/4
# All dead links refer to dead characters and can be removed as they are
# encountered.
if [ -e known/1/4 ]
then
echo 1 knows 4.
else
echo 4 is dead.
fi
Ugly but doable.
--
Shawn
</PRE>
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<LI><STRONG><A NAME="00076" HREF="msg00076.html">Re: [MUD-Dev] Mail from mud Update :)</A></STRONG>
<UL><LI><EM>From:</EM> JC Lawrence <claw#under,Eng.Sun.COM></LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><strong><A NAME="00023" HREF="msg00023.html">Who's bugging who? : was- Wild West</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Sun 04 Jan 1998, 20:44 GMT
<LI><strong><A NAME="00020" HREF="msg00020.html">Re: [MUD-Dev] Circumstances & Situations</A></strong>,
Richard Woolcock <a href="mailto:KaVir#dial,pipex.com">KaVir#dial,pipex.com</a>, Sun 04 Jan 1998, 01:15 GMT
<LI><strong><A NAME="00019" HREF="msg00019.html">Re: [MUD-Dev] Mail from mud Update :)</A></strong>,
Richard Woolcock <a href="mailto:KaVir#dial,pipex.com">KaVir#dial,pipex.com</a>, Sun 04 Jan 1998, 01:10 GMT
<UL>
<LI><strong><A NAME="00076" HREF="msg00076.html">Re: [MUD-Dev] Mail from mud Update :)</A></strong>,
JC Lawrence <a href="mailto:claw#under,Eng.Sun.COM">claw#under,Eng.Sun.COM</a>, Wed 07 Jan 1998, 00:37 GMT
<UL>
<LI><strong><A NAME="00085" HREF="msg00085.html">Re: [MUD-Dev] Mail from mud Update :)</A></strong>,
Shawn Halpenny <a href="mailto:malachai#iname,com">malachai#iname,com</a>, Wed 07 Jan 1998, 15:48 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
<LI><strong><A NAME="00017" HREF="msg00017.html">Mud-Dev FAQ</A></strong>,
Ling <a href="mailto:K.L.Lo-94#student,lboro.ac.uk">K.L.Lo-94#student,lboro.ac.uk</a>, Sat 03 Jan 1998, 16:44 GMT
<UL>
<LI><strong><A NAME="00021" HREF="msg00021.html">Re: [MUD-Dev] Mud-Dev FAQ</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Sun 04 Jan 1998, 06:30 GMT
<UL>
<LI><strong><A NAME="00026" HREF="msg00026.html">Re: [MUD-Dev] request for comments (was: Mud-Dev FAQ)</A></strong>,
Vadim Tkachenko <a href="mailto:vadimt#4cs,com">vadimt#4cs,com</a>, Mon 05 Jan 1998, 14:34 GMT
<UL>
<LI><strong><A NAME="00033" HREF="msg00033.html">Re: [MUD-Dev] request for comments (was: Mud-Dev FAQ)</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Mon 05 Jan 1998, 21:05 GMT
</LI>
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