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Annotation of 43BSDTahoe/man/man8/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
        !             5: .\" provided that the above copyright notice and this paragraph are
        !             6: .\" duplicated in all such forms and that any documentation,
        !             7: .\" advertising materials, and other materials related to such
        !             8: .\" distribution and use acknowledge that the software was developed
        !             9: .\" by the University of California, Berkeley.  The name of the
        !            10: .\" University may not be used to endorse or promote products derived
        !            11: .\" from this software without specific prior written permission.
        !            12: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            13: .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            14: .\" WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            15: .\"
        !            16: .\"    @(#)dm.8        5.6 (Berkeley) 7/9/88
        !            17: .\"
        !            18: .TH DM 8 "July 9, 1988"
        !            19: .UC 8
        !            20: .SH NAME
        !            21: dm \- dungeon master
        !            22: .SH SYNOPSIS
        !            23: .B ln -s dm game
        !            24: .SH DESCRIPTION
        !            25: \fIDm\fP is a program used to regulate game playing.  \fIDm\fP expects to
        !            26: be invoked with the name of a game that a user wishes to play.  This is
        !            27: done by creating symbolic links to \fIdm\fP, in \fI/usr/games\fP, for all
        !            28: of the regulated games.  The actual binaries for these games should be
        !            29: placed in a ``hidden'' directory, \fI/usr/games/hide\fP, that may only be
        !            30: accessed by the \fIdm\fP program.  \fIDm\fP determines if the requested
        !            31: game is available and, if so, runs it.  The file \fI/usr/games/dm.config\fP
        !            32: controls the conditions under which games may be run.  For remotely mounted
        !            33: file systems, a machine name may be appended to the config file name,
        !            34: i.e. the machine ``rip.berkeley.edu'' will use the file \fIdm.config.rip\fP
        !            35: if it is present, otherwise it will use \fIdm.config\fP.
        !            36: .PP
        !            37: The file \fI/usr/games/nogames\fP may be used to ``turn off'' game
        !            38: playing.  If the file exists, no game playing is allowed; the contents
        !            39: of the file will be displayed to any user requesting a game.
        !            40: .SH FILES
        !            41: .nf
        !            42: .ta \w'/usr/games/dm.config 'u
        !            43: /usr/games/dm.config   - configuration file
        !            44: /usr/games/hide                - directory of ``real'' binaries
        !            45: /usr/games/nogames     - turns off game playing
        !            46: .SH SEE ALSO
        !            47: dm.config(5)
        !            48: .SH BUGS
        !            49: Two problems result from \fIdm\fP running the games setuid ``games''.
        !            50: First, all games that allow users to run UNIX commands should carefully
        !            51: set both the real and effective user id's immediately before executing
        !            52: those commands.  Probably more important is that \fIdm\fP never be setuid
        !            53: anything but ``games'' so that compromising a game will result only in
        !            54: the user's ability to play games at will.  Secondly, games which previously
        !            55: had no reason to run setuid and which accessed user files may have to
        !            56: be modified.

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