trek/main.c

   1 /*      $NetBSD: main.c,v 1.7 1999/09/12 09:02:24 jsm 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. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by the University of
  18  *      California, Berkeley and its contributors.
  19  * 4. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 #ifndef lint
  38 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
  39         The Regents of the University of California.  All rights reserved.\n");
  40 #endif /* not lint */
  41
  42 #ifndef lint
  43 #if 0
  44 static char sccsid[] = "@(#)main.c      8.1 (Berkeley) 5/31/93";
  45 #else
  46 __RCSID("$NetBSD: main.c,v 1.7 1999/09/12 09:02:24 jsm Exp $");
  47 #endif
  48 #endif /* not lint */
  49
  50 #include <stdio.h>
  51 #include <setjmp.h>
  52 #include <termios.h>
  53 #include <stdlib.h>
  54 #include <unistd.h>
  55 #include <err.h>
  56 #include <time.h>
  57 #include "trek.h"
  58 #include "getpar.h"
  59
  60 # define        PRIO            00      /* default priority */
  61
  62 int     Mother  = 51 + (51 << 8);
  63
  64 /*
  65 **       ####  #####    #    ####          #####  ####   #####  #   #
  66 **      #        #     # #   #   #           #    #   #  #      #  #
  67 **       ###     #    #####  ####            #    ####   ###    ###
  68 **          #    #    #   #  #  #            #    #  #   #      #  #
  69 **      ####     #    #   #  #   #           #    #   #  #####  #   #
  70 **
  71 **      C version by Eric P. Allman 5/76 (U.C. Berkeley) with help
  72 **              from Jeff Poskanzer and Pete Rubinstein.
  73 **
  74 **      I also want to thank everyone here at Berkeley who
  75 **      where crazy enough to play the undebugged game.  I want to
  76 **      particularly thank Nick Whyte, who made considerable
  77 **      suggestions regarding the content of the game.  Why, I'll
  78 **      never forget the time he suggested the name for the
  79 **      "capture" command.
  80 **
  81 **      Please send comments, questions, and suggestions about this
  82 **              game to:
  83 **                      Eric P. Allman
  84 **                      Project INGRES
  85 **                      Electronics Research Laboratory
  86 **                      Cory Hall
  87 **                      University of California
  88 **                      Berkeley, California  94720
  89 **
  90 **      If you make ANY changes in the game, I sure would like to
  91 **      know about them.  It is sort of an ongoing project for me,
  92 **      and I very much want to put in any bug fixes and improvements
  93 **      that you might come up with.
  94 **
  95 **      FORTRASH version by Kay R. Fisher (DEC) "and countless others".
  96 **      That was adapted from the "original BASIC program" (ha!) by
  97 **              Mike Mayfield (Centerline Engineering).
  98 **
  99 **      Additional inspiration taken from FORTRAN version by
 100 **              David Matuszek and Paul Reynolds which runs on the CDC
 101 **              7600 at Lawrence Berkeley Lab, maintained there by
 102 **              Andy Davidson.  This version is also available at LLL
 103 **              and at LMSC.  In all fairness, this version was the
 104 **              major inspiration for this version of the game (trans-
 105 **              lation:  I ripped off a whole lot of code).
 106 **
 107 **      Minor other input from the "Battelle Version 7A" by Joe Miller
 108 **              (Graphics Systems Group, Battelle-Columbus Labs) and
 109 **              Ross Pavlac (Systems Programmer, Battelle Memorial
 110 **              Institute).  That version was written in December '74
 111 **              and extensively modified June '75.  It was adapted
 112 **              from the FTN version by Ron Williams of CDC Sunnyvale,
 113 **              which was adapted from the Basic version distributed
 114 **              by DEC.  It also had "neat stuff swiped" from T. T.
 115 **              Terry and Jim Korp (University of Texas), Hicks (Penn
 116 **              U.), and Rick Maus (Georgia Tech).  Unfortunately, it
 117 **              was not as readable as it could have been and so the
 118 **              translation effort was severely hampered.  None the
 119 **              less, I got the idea of inhabited starsystems from this
 120 **              version.
 121 **
 122 **      Permission is given for use, copying, and modification of
 123 **              all or part of this program and related documentation,
 124 **              provided that all reference to the authors are maintained.
 125 **
 126 **
 127 **********************************************************************
 128 **
 129 **  NOTES TO THE MAINTAINER:
 130 **
 131 **      There is a compilation option xTRACE which must be set for any
 132 **      trace information to be generated.  It is probably defined in
 133 **      the version that you get.  It can be removed, however, if you
 134 **      have trouble finding room in core.
 135 **
 136 **      Many things in trek are not as clear as they might be, but are
 137 **      done to reduce space.  I compile with the -f and -O flags.  I
 138 **      am constrained to running with non-seperated I/D space, since
 139 **      we don't have doubleing point hardware here; even if we did, I
 140 **      would like trek to be available to the large number of people
 141 **      who either have an 11/40 or do not have FP hardware.  I also
 142 **      found it desirable to make the code run reentrant, so this
 143 **      added even more space constraints.
 144 **
 145 **      I use the portable C library to do my I/O.  This is done be-
 146 **      cause I wanted the game easily transportable to other C
 147 **      implementations, and because I was too lazy to do the doubleing
 148 **      point input myself.  Little did I know.  The portable C library
 149 **      released by Bell Labs has more bugs than you would believe, so
 150 **      I ended up rewriting the whole blessed thing.  Trek excercises
 151 **      many of the bugs in it, as well as bugs in some of the section
 152 **      III UNIX routines.  We have fixed them here.  One main problem
 153 **      was a bug in alloc() that caused it to always ask for a large
 154 **      hunk of memory, which worked fine unless you were almost out,
 155 **      which I inevitably was.  If you want the code for all of this
 156 **      stuff, it is also available through me.
 157 **
 158 ***********************************************************************
 159 */
 160
 161 jmp_buf env;
 162
 163 int main __P((int, char **));
 164
 165 int
 166 main(argc, argv)
 167 int     argc;
 168 char    **argv;
 169 {
 170         time_t          curtime;
 171         long                    vect;
 172         char            opencode;
 173         int                     prio;
 174         int             ac;
 175         char            **av;
 176         struct  termios         argp;
 177
 178         /* Revoke setgid privileges */
 179         setregid(getgid(), getgid());
 180
 181         av = argv;
 182         ac = argc;
 183         av++;
 184         time(&curtime);
 185         vect = (long) curtime;
 186         srand(vect);
 187         opencode = 'w';
 188         prio = PRIO;
 189
 190         if (tcgetattr(1, &argp) == 0)
 191         {
 192                 if (cfgetispeed(&argp) < B1200)
 193                         Etc.fast++;
 194         }
 195
 196         while (ac > 1 && av[0][0] == '-')
 197         {
 198                 switch (av[0][1])
 199                 {
 200                   case 'a':     /* append to log file */
 201                         opencode = 'a';
 202                         break;
 203
 204                   case 'f':     /* set fast mode */
 205                         Etc.fast++;
 206                         break;
 207
 208                   case 's':     /* set slow mode */
 209                         Etc.fast = 0;
 210                         break;
 211
 212 #               ifdef xTRACE
 213                   case 't':     /* trace */
 214                         if (getuid() != Mother)
 215                                 goto badflag;
 216                         Trace++;
 217                         break;
 218 #               endif
 219
 220                   case 'p':     /* set priority */
 221                         if (getuid() != Mother)
 222                                 goto badflag;
 223                         prio = atoi(av[0] + 2);
 224                         break;
 225
 226                   default:
 227                   badflag:
 228                         printf("Invalid option: %s\n", av[0]);
 229
 230                 }
 231                 ac--;
 232                 av++;
 233         }
 234         if (ac > 2)
 235                 errx(1, "arg count");
 236                 /*
 237         if (ac > 1)
 238                 f_log = fopen(av[0], opencode);
 239                 */
 240
 241         printf("\n   * * *   S T A R   T R E K   * * *\n\nPress return to continue.\n");
 242
 243         if (setjmp(env))
 244         {
 245                 if ( !getynpar("Another game") )
 246                         exit(0);
 247         }
 248         do
 249         {
 250                 setup();
 251                 play();
 252         } while (getynpar("Another game"));
 253
 254         fflush(stdout);
 255         return 0;
 256 }