trek/main.c

   1 /*      $NetBSD: main.c,v 1.11 2003/08/07 09:37:52 agc Exp $    */
   2
   3 /*
   4  * Copyright (c) 1980, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
  35         The Regents of the University of California.  All rights reserved.\n");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)main.c      8.1 (Berkeley) 5/31/93";
  41 #else
  42 __RCSID("$NetBSD: main.c,v 1.11 2003/08/07 09:37:52 agc Exp $");
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <stdio.h>
  47 #include <setjmp.h>
  48 #include <termios.h>
  49 #include <stdlib.h>
  50 #include <unistd.h>
  51 #include <err.h>
  52 #include <time.h>
  53 #include <sys/types.h>
  54 #include "trek.h"
  55 #include "getpar.h"
  56
  57 # define        PRIO            00      /* default priority */
  58
  59 uid_t   Mother  = 51 + (51 << 8);
  60
  61 /*
  62 **       ####  #####    #    ####          #####  ####   #####  #   #
  63 **      #        #     # #   #   #           #    #   #  #      #  #
  64 **       ###     #    #####  ####            #    ####   ###    ###
  65 **          #    #    #   #  #  #            #    #  #   #      #  #
  66 **      ####     #    #   #  #   #           #    #   #  #####  #   #
  67 **
  68 **      C version by Eric P. Allman 5/76 (U.C. Berkeley) with help
  69 **              from Jeff Poskanzer and Pete Rubinstein.
  70 **
  71 **      I also want to thank everyone here at Berkeley who
  72 **      where crazy enough to play the undebugged game.  I want to
  73 **      particularly thank Nick Whyte, who made considerable
  74 **      suggestions regarding the content of the game.  Why, I'll
  75 **      never forget the time he suggested the name for the
  76 **      "capture" command.
  77 **
  78 **      Please send comments, questions, and suggestions about this
  79 **              game to:
  80 **                      Eric P. Allman
  81 **                      Project INGRES
  82 **                      Electronics Research Laboratory
  83 **                      Cory Hall
  84 **                      University of California
  85 **                      Berkeley, California  94720
  86 **
  87 **      If you make ANY changes in the game, I sure would like to
  88 **      know about them.  It is sort of an ongoing project for me,
  89 **      and I very much want to put in any bug fixes and improvements
  90 **      that you might come up with.
  91 **
  92 **      FORTRASH version by Kay R. Fisher (DEC) "and countless others".
  93 **      That was adapted from the "original BASIC program" (ha!) by
  94 **              Mike Mayfield (Centerline Engineering).
  95 **
  96 **      Additional inspiration taken from FORTRAN version by
  97 **              David Matuszek and Paul Reynolds which runs on the CDC
  98 **              7600 at Lawrence Berkeley Lab, maintained there by
  99 **              Andy Davidson.  This version is also available at LLL
 100 **              and at LMSC.  In all fairness, this version was the
 101 **              major inspiration for this version of the game (trans-
 102 **              lation:  I ripped off a whole lot of code).
 103 **
 104 **      Minor other input from the "Battelle Version 7A" by Joe Miller
 105 **              (Graphics Systems Group, Battelle-Columbus Labs) and
 106 **              Ross Pavlac (Systems Programmer, Battelle Memorial
 107 **              Institute).  That version was written in December '74
 108 **              and extensively modified June '75.  It was adapted
 109 **              from the FTN version by Ron Williams of CDC Sunnyvale,
 110 **              which was adapted from the Basic version distributed
 111 **              by DEC.  It also had "neat stuff swiped" from T. T.
 112 **              Terry and Jim Korp (University of Texas), Hicks (Penn
 113 **              U.), and Rick Maus (Georgia Tech).  Unfortunately, it
 114 **              was not as readable as it could have been and so the
 115 **              translation effort was severely hampered.  None the
 116 **              less, I got the idea of inhabited starsystems from this
 117 **              version.
 118 **
 119 **      Permission is given for use, copying, and modification of
 120 **              all or part of this program and related documentation,
 121 **              provided that all reference to the authors are maintained.
 122 **
 123 **
 124 **********************************************************************
 125 **
 126 **  NOTES TO THE MAINTAINER:
 127 **
 128 **      There is a compilation option xTRACE which must be set for any
 129 **      trace information to be generated.  It is probably defined in
 130 **      the version that you get.  It can be removed, however, if you
 131 **      have trouble finding room in core.
 132 **
 133 **      Many things in trek are not as clear as they might be, but are
 134 **      done to reduce space.  I compile with the -f and -O flags.  I
 135 **      am constrained to running with non-separated I/D space, since
 136 **      we don't have doubleing point hardware here; even if we did, I
 137 **      would like trek to be available to the large number of people
 138 **      who either have an 11/40 or do not have FP hardware.  I also
 139 **      found it desirable to make the code run reentrant, so this
 140 **      added even more space constraints.
 141 **
 142 **      I use the portable C library to do my I/O.  This is done be-
 143 **      cause I wanted the game easily transportable to other C
 144 **      implementations, and because I was too lazy to do the doubleing
 145 **      point input myself.  Little did I know.  The portable C library
 146 **      released by Bell Labs has more bugs than you would believe, so
 147 **      I ended up rewriting the whole blessed thing.  Trek excercises
 148 **      many of the bugs in it, as well as bugs in some of the section
 149 **      III UNIX routines.  We have fixed them here.  One main problem
 150 **      was a bug in alloc() that caused it to always ask for a large
 151 **      hunk of memory, which worked fine unless you were almost out,
 152 **      which I inevitably was.  If you want the code for all of this
 153 **      stuff, it is also available through me.
 154 **
 155 ***********************************************************************
 156 */
 157
 158 jmp_buf env;
 159
 160 int main __P((int, char **));
 161
 162 int
 163 main(argc, argv)
 164 int     argc;
 165 char    **argv;
 166 {
 167         time_t          curtime;
 168         long                    vect;
 169         char            opencode;
 170         int                     prio;
 171         int             ac;
 172         char            **av;
 173         struct  termios         argp;
 174
 175         /* Revoke setgid privileges */
 176         setgid(getgid());
 177
 178         av = argv;
 179         ac = argc;
 180         av++;
 181         time(&curtime);
 182         vect = (long) curtime;
 183         srand(vect);
 184         opencode = 'w';
 185         prio = PRIO;
 186
 187         if (tcgetattr(1, &argp) == 0)
 188         {
 189                 if (cfgetispeed(&argp) < B1200)
 190                         Etc.fast++;
 191         }
 192
 193         while (ac > 1 && av[0][0] == '-')
 194         {
 195                 switch (av[0][1])
 196                 {
 197                   case 'a':     /* append to log file */
 198                         opencode = 'a';
 199                         break;
 200
 201                   case 'f':     /* set fast mode */
 202                         Etc.fast++;
 203                         break;
 204
 205                   case 's':     /* set slow mode */
 206                         Etc.fast = 0;
 207                         break;
 208
 209 #               ifdef xTRACE
 210                   case 't':     /* trace */
 211                         if (getuid() != Mother)
 212                                 goto badflag;
 213                         Trace++;
 214                         break;
 215 #               endif
 216
 217                   case 'p':     /* set priority */
 218                         if (getuid() != Mother)
 219                                 goto badflag;
 220                         prio = atoi(av[0] + 2);
 221                         break;
 222
 223                   default:
 224                   badflag:
 225                         printf("Invalid option: %s\n", av[0]);
 226
 227                 }
 228                 ac--;
 229                 av++;
 230         }
 231         if (ac > 2)
 232                 errx(1, "arg count");
 233                 /*
 234         if (ac > 1)
 235                 f_log = fopen(av[0], opencode);
 236                 */
 237
 238         printf("\n   * * *   S T A R   T R E K   * * *\n\nPress return to continue.\n");
 239
 240         if (setjmp(env))
 241         {
 242                 if ( !getynpar("Another game") )
 243                         exit(0);
 244         }
 245         do
 246         {
 247                 setup();
 248                 play();
 249         } while (getynpar("Another game"));
 250
 251         fflush(stdout);
 252         return 0;
 253 }