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Annotation of 43BSDReno/games/dm/dm.8, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1987 Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted provided
        !             5: .\" that: (1) source distributions retain this entire copyright notice and
        !             6: .\" comment, and (2) distributions including binaries display the following
        !             7: .\" acknowledgement:  ``This product includes software developed by the
        !             8: .\" University of California, Berkeley and its contributors'' in the
        !             9: .\" documentation or other materials provided with the distribution and in
        !            10: .\" all advertising materials mentioning features or use of this software.
        !            11: .\" Neither the name of the University nor the names of its contributors may
        !            12: .\" be used to endorse or promote products derived from this software without
        !            13: .\" specific prior written permission.
        !            14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            17: .\"
        !            18: .\"    @(#)dm.8        5.8 (Berkeley) 6/26/90
        !            19: .\"
        !            20: .TH DM 8 "June 26, 1990"
        !            21: .UC 8
        !            22: .SH NAME
        !            23: dm \- dungeon master
        !            24: .SH SYNOPSIS
        !            25: .B ln -s dm game
        !            26: .SH DESCRIPTION
        !            27: .I Dm
        !            28: is a program used to regulate game playing.
        !            29: .I Dm
        !            30: expects to be invoked with the name of a game that a user wishes to play.
        !            31: This is done by creating symbolic links to
        !            32: .IR dm ,
        !            33: in the directory ``/usr/games'' for all of the regulated games.
        !            34: The actual binaries for these games should be placed in a ``hidden''
        !            35: directory, ``/usr/games/hide'', that may only be accessed by the
        !            36: .I dm
        !            37: program.
        !            38: .I Dm
        !            39: determines if the requested game is available and, if so, runs it.
        !            40: The file ``/etc/dm.conf'' controls the conditions under which games may
        !            41: be run.
        !            42: .PP
        !            43: The file ``/etc/nogames'' may be used to ``turn off'' game playing.
        !            44: If the file exists, no game playing is allowed; the contents of the file
        !            45: will be displayed to any user requesting a game.
        !            46: .SH FILES
        !            47: .nf
        !            48: .ta \w'/var/log/games.log 'u
        !            49: /etc/dm.conf   \- configuration file
        !            50: /etc/nogames   \- turns off game playing
        !            51: /usr/games/hide        \- directory of ``real'' binaries
        !            52: /var/log/games.log     \- game logging file
        !            53: .SH SEE ALSO
        !            54: dm(5)
        !            55: .SH BUGS
        !            56: Two problems result from \fIdm\fP running the games setuid ``games''.
        !            57: First, all games that allow users to run UNIX commands should carefully
        !            58: set both the real and effective user id's immediately before executing
        !            59: those commands.  Probably more important is that \fIdm\fP never be setuid
        !            60: anything but ``games'' so that compromising a game will result only in
        !            61: the user's ability to play games at will.  Secondly, games which previously
        !            62: had no reason to run setuid and which accessed user files may have to
        !            63: be modified.

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