Provided by: glhack_1.2-4_amd64 bug


       glhack - Exploring The Mazes of Menace


       glhack [options]

       glhack -s [options]


       glHack  is a port of the game NetHack, using hardware acceleration via OpenGL(R) to render
       the 2D tile graphics.  It uses LibSDL as the video  and  input  library.   There  is  good
       support for software rendering as well.

       NetHack  is  a  display  oriented  Dungeons  &  Dragons(tm) - like game.  The standard tty
       display and command structure resemble rogue.

       To get started you really only need to know two commands.  The `?'  command will give  you
       a  list  of the available commands (as well as other information) and the `/' command will
       identify the things you see on the screen.

       To win the game (as opposed to merely playing to beat other people's high scores) you must
       locate the Amulet of Yendor which is somewhere below the 20th level of the dungeon and get
       it out.  This is not an easy feat!

       When the game ends, whether by your dying, quitting, or escaping from  the  caves,  glHack
       will  give  you  (a  fragment  of)  the list of top scorers.  The scoring is based on many
       aspects of your behavior, but a rough estimate is obtained by taking the  amount  of  gold
       you've  found  in the cave plus four times your (real) experience.  Precious stones may be
       worth a lot of gold when brought to the exit.  There is a 10% penalty for getting yourself


       These are the standard options that NetHack supports.

       -u playername
              This  option  supplies the answer to the question "Who are you?".  It overrides any
              name from the options or configuration file, the USER orLOGNAME shell variables, or
              getlogin(),  which  will  otherwise be tried in order.  If none of these provides a
              useful name, the player will be asked for one.  Player names (in  conjunction  with
              uids)  are  used  to identify save files, so you can have several saved games under
              different names.  Conversely, you must use the appropriate player name to restore a
              saved game.

              A  playername  suffix can be used to specify the profession, race, alignment and/or
              gender of the character.  The full syntax of the playername that includes a  suffix
              is  "name-ppp-rrr-aaa-ggg".   "ppp"  is  at  least  the  first three letters of the
              profession (this can also be specified using the -p option).  "rrr" is at least the
              first  three  letters of the character's race (this can also be specified using the
              -r option).  "aaa"  is  at  least  the  first  three  letters  of  the  character's
              alignment, and "ggg" is at least the first three letters of the character's gender.
              Any of the suffix parts suffix may be left out.

       -p profession
              This can be used to determine the character role.  You can specify either the  male
              or female name for the character role, or the first three characters of the role as
              an abbreviation.  `@' and random can also be used to mean "choose a random role".

       -r race
              Likewise this can be used to explicitly request that a race be chosen.

              Note: Leaving out any of these characteristics will result in  you  being  prompted
              during the game startup for the information.

       -@     Choose  all  (remaining)  character  attributes  randomly.   It  doesn't affect any
              characteristics that have already been specified by other means.

       -s     This option alone will print out the list of your scores on  the  current  version.
              The  -s  may  also  be  followed  by  arguments  -p  and  -r to print the scores of
              particular roles and races only.  It may also be followed by  one  or  more  player
              names  to  print  the  scores  of  the players mentioned, by 'all' to print out all
              scores, or by a number to print that many top scores.

       -dec and -ibm
              These command line options are equivalent to the decgraphics  and  ibmgraphics  in-
              game  options,  and  are  provided  purely  for  convenience  on systems supporting
              multiple types of terminals.

       -D or -X
              These option will start the game in a special non-scoring discovery mode.   If  the
              player is the game administrator, -D will start in debugging (wizard) mode instead.

       -n     This option suppresses printing of any news from the game administrator.

       -d     This  option  is  usually only useful to the game administrator.  If it appears, it
              must be the first argument, and supplies a directory  which  is  to  serve  as  the
              playground.   It  overrides  the  value  from NETHACKDIR, HACKDIR, or the directory
              specified   by    the    game    administrator    during    compilation    (usually
              /usr/lib/games/glhack).   The  playground must contain several auxiliary files such
              as help files, the list of top scorers, and a subdirectory  save  where  games  are


       These are the command line options specific to glHack.

       They  all  begin with a double dash (`--').  Values are normally separated from the option
       with a space, like "--depth 32".

       Alternatively, a value  can  be  placed  after  an  `='  sign  without  any  spaces,  like
       "--depth=32".   This should be used if the value begins with a minus (`-') sign, otherwise
       the number will be mistaken as a new option.

       Options that take a value are shown here with example values.

       --mode 640x480
              Specifies the video mode.  Normally glHack will autodetect the mode, but using this
              option will override that.  The default value (when all else fails) is 800x600.

       --depth 8
              Video  depth  (bits  per pixel).  Possible values are 15, 16, 24 and 32, and 8 when
              using the software renderer.  The default value is autodetected.

              Play inside a window, rather than fullscreen.

              Gamma correction value.  Range is -5 to +5, where positive values make  the  screen
              brighter, and negative values make it darker.  Zero is the default (no adjustment).

       --tileheight 64
              Choose  the  tileset,  which  can  be 16, 32 or 64.  The default is 32.  To get the
              Isometric 3D tileset, use the value 64.

       --fontsize 22
              Choose the font size, out of 8, 14, 20 or 22.  The default is 20.  The  given  size
              will  be  used  for  all text windows, overriding any wincap settings in the config

       --help Show a help page.

              Show the current version.  This can also be done within the game using the #version


       USER or LOGNAME
              Your login name (used as the player name).

       HOME   Your home directory (used to find the config file).

              String predefining several standard NetHack options.

              String predefining several glHack-specific options.

              Playground directory (see -d option above).

       In addition, SHOPTYPE is used in debugging (wizard) mode.


       glHack runs set-gid games.  This is needed to create/modify the persistent game files.  In
       general, set-gid programs are a lot more secure than set-uid programs.   An  attacker  who
       successfully  compromises a set-gid game executable can only mess around with various game
       data files (typically those in /var/games and /var/lib/games).

       Since glHack is based on NetHack 3.4.0, any security issues with NetHack  3.4.0  (past  or
       future) will almost certainly apply to this release of glHack.

       Currently  there is only one place in the glHack-specific code that creates or writes to a
       file: the screenshot code.  Taking screenshots is restricted  to  the  game  administrator
       (the "wizard" account).

       As  far  as  I know, glHack will never execute another program.  The following features of
       the NetHack 3.4.0 codebase which do  execute  other  programs  are  disabled  in  glHack's
       standard (compile-time) configuration: running a compression utility (COMPRESS), running a
       shell (SHELL), reading mail (MAIL), and running an external pager (TTY code).


              Configuration  file  for  glHack.   See  the  glhackrc(5)  manual  page  for   more

              The  static playground.  Read-only files are stored here.  Files found here will be
              marked "(STATIC)" in the entries below.

              The variable playground.  Persistent  (read/write)  data  files  are  stored  here.
              These files are marked "(VAR)" below.

       nhdat (STATIC)
              Archive  containing  all the stuff that NetHack requires to play (level files, text
              files, help files, etc).  The format  is  DLB  (Data  LiBrarian)  and  is  NetHack-

       license (STATIC)
              Rules governing redistribution.

       glhack_recover (STATIC)
              This  program  can be used to recover a game after glHack has crashed (assuming the
              files were not corrupted).  It can only be run as the superuser (root).

       gl*.png (STATIC)
              Images (fonts, tilesets, etc) used by glHack.

       gl*.lst (STATIC)
              Miscellaneous data files (e.g. tile facing info) used by glHack.

       record (VAR)
              The list of top scorers.

       logfile (VAR)
              An extended list of games played.

       perm (VAR)
              Empty file used for locking purposes.

       bonDD.nn (VAR)
              Bone files: descriptions of the ghost and belongings of a deceased adventurer.

       NNNNname.dd (VAR)
              Temporary files for a user who is currently playing glHack,  or  after  glHack  has
              crashed.  The `NNNN' part is the numeric userid, followed by the player's name.

       save/ (VAR)
              A subdirectory containing the saved games.


       This  program is free software.  It is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS  FOR


       glhackrc(5) nethack-guidebook(6)

       The glHack Homepage:⟩

       The official NetHack page:⟩

       Dungeons & Dragons is a Trademark of TSR Inc.

                                           January 2003                                 glHack(6)