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Test Your Knowledge in Computers #909
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In computer science, a pointer is a programming language object that stores the memory address of another value located on a hard drive.
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zork(6) [bsd man page]

ZORK(6) 							   Games Manual 							   ZORK(6)

NAME
zork - the game of dungeon SYNOPSIS
/usr/games/zork DESCRIPTION
Dungeon is a computer fantasy simulation based on Adventure and on Dungeons & Dragons, originally written by Lebling, Blank, and Anderson of MIT. In it you explore a dungeon made up of various rooms, caves, rivers, and so on. The object of the game is to collect as much treasure as possible and stow it safely in the trophy case (and, of course, to stay alive.) Figuring out the rules is part of the game, but if you are stuck, you should start off with "open mailbox", "take leaflet", and then "read leaflet". Additional useful commands that are not documented include: quit (to end the game) !cmd (the usual shell escape convention) > (to save a game) < (to restore a game) FILES
/usr/games/lib/d* 4th Berkeley Distribution May 20, 1985 ZORK(6)

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DM(8)							    BSD System Manager's Manual 						     DM(8)

NAME
dm -- dungeon master SYNOPSIS
ln -s dm game DESCRIPTION
dm is a program used to regulate game playing. dm expects to be invoked with the name of a game that a user wishes to play. This is done by creating symbolic links to dm, in the directory /usr/games for all of the regulated games. The actual binaries for these games should be placed in a ``hidden'' directory, /usr/games/hide, that may only be accessed by the dm program. dm determines if the requested game is available and, if so, runs it. The file /etc/dm.conf controls the conditions under which games may be run. The file /etc/nogames may be used to ``turn off'' game playing. If the file exists, no game playing is allowed; the contents of the file will be displayed to any user requesting a game. FILES
/etc/dm.conf configuration file /etc/nogames turns off game playing /usr/games/hide directory of ``real'' binaries /var/log/games.log game logging file SEE ALSO
dm.conf(5) HISTORY
The dm command appeared in 4.3BSD-Tahoe. SECURITY CONSIDERATIONS
Two issues result from dm running the games setgid ``games''. First, all games that allow users to run UNIX commands should carefully set both the real and effective group ids immediately before executing those commands. Probably more important is that dm never be setgid any- thing but ``games'' so that compromising a game will result only in the user's ability to play games at will. Secondly, games which previ- ously had no reason to run setgid and which accessed user files may have to be modified. BSD
May 31, 1993 BSD

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