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index(1) [plan9 man page]

0intro 0intro intro 0intro 2a 2a 6a 2a 8a 2a ka 2a va 2a xa 2a 2c
2c 6c 2c 8c 2c kc 2c vc 2c xc 2c 2l 2l 6l 2l 8l 2l kl 2l vl 2l xl
2l 81/2 81/2 label 81/2 window 81/2 wloc 81/2 acid acid acme acme
awd acme win acme 8al alef alef alef kal alef val alef ar ar  art
art  art2pic art ascii ascii unicode ascii awk awk basename base-
name bc bc bind bind mount bind unmount bind  bundle  bundle  c++
c++ c++/2c c++ c++/2l c++ c++/8c c++ c++/8l c++ c++/kc c++ c++/kl
c++ c++/vc c++ c++/vl c++ cal cal calendar calendar cat cat  read
cat  char  char  rschar char 1/2char char chgrp chgrp chmod chmod
cmp cmp comm comm con con cu con rx con telnet con  xmr  con  xms
con cp cp mv cp cpp cpp cpu cpu date date db db dc dc dd dd dela-
tex deroff deroff deroff diff diff doctype  doctype  du  du  echo
echo  ed  ed emacs emacs eqn eqn factor factor primes factor file
file fmt fmt fone fone fortune fortune	freq  freq  4s	games  5s
games  ana  games  catclock games clock games festoon games fire-
works games fsim games games games life games mandel games  plumb
games  smiley games swar games grap grap graph graph grep grep gs
gs hoc hoc hp hp join join broke kill kill kill ktrans ktrans lex
lex  look  look lp lp lc ls ls ls aliasmail mail edmail mail mail
mail seemail mail sendmail mail smtp mail smtpd mail to mail vis-
mon  mail  vwhois mail lookman man man man mc mc membername mk mk
mk mkdir mkdir mothra mothra netstat netstat news news nm nm p	p
page  page  netkey  passwd passwd passwd pcc pcc pic pic tpic pic
plot plot ppp ppp pppclient ppp pppserver ppp pr  pr  kprof  prof
prof  prof proof proof ps ps psu ps pbd pwd pwd pwd cd rc eval rc
exec rc exit rc flag rc rc rc rfork rc shift rc wait rc whatis rc
~  rc  rm rm B sam sam sam sam.save sam sed sed seq seq size size
sleep sleep sort sort spell spell sprog  spell	spin  spin  split
split start stop stop stop strings strings strip strip md5sum sum
sum sum syscall syscall tail  tail  32vfs  tapefs  cpiofs  tapefs
tapefs	tapefs tapfs tapefs tarfs tapefs tpfs tapefs v10fs tapefs
v6fs tapefs tar tar tbl tbl tcs tcs tee tee iwhois  tel  tel  tel
test test bibtex tex dvips tex dviselect tex latex tex mf tex tex
tex time time touch touch tr tr nroff  troff  troff  troff  tweak
tweak twig twig uniq uniq units units ki vi vi vi xi vi wc wc who
who whois who xd xd yacc yacc yesterday yesterday

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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/lib/games/dm, 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/lib/games/dm     directory of ``real'' binaries
     /var/games/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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