games/sail/dr_main.c

   1 /*      $NetBSD: dr_main.c,v 1.15 2010/08/06 09:14:40 dholland Exp $    */
   2
   3 /*
   4  * Copyright (c) 1983, 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 #if 0
  35 static char sccsid[] = "@(#)dr_main.c   8.2 (Berkeley) 4/16/94";
  36 #else
  37 __RCSID("$NetBSD: dr_main.c,v 1.15 2010/08/06 09:14:40 dholland Exp $");
  38 #endif
  39 #endif /* not lint */
  40
  41 #include <err.h>
  42 #include <setjmp.h>
  43 #include <signal.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <unistd.h>
  47 #include "extern.h"
  48 #include "driver.h"
  49 #include "player.h" /* XXX for LEAVE_FORK */
  50 #include "restart.h"
  51
  52 static int driver_wait_fd = -1;
  53
  54 int
  55 dr_main(void)
  56 {
  57         int n;
  58         struct ship *sp;
  59         int nat[NNATION];
  60         int value = 0;
  61
  62         /*
  63          * XXX need a way to print diagnostics back to the player
  64          * process instead of stomping on the curses screen.
  65          */
  66
  67         signal(SIGINT, SIG_IGN);
  68         signal(SIGQUIT, SIG_IGN);
  69         signal(SIGTSTP, SIG_IGN);
  70         if (game < 0 || game >= NSCENE) {
  71                 errx(1, "\ndriver: Bad game number %d", game);
  72         }
  73         cc = &scene[game];
  74         ls = SHIP(cc->vessels);
  75         if (sync_open() < 0) {
  76                 err(1, "\ndriver: syncfile");
  77         }
  78         for (n = 0; n < NNATION; n++)
  79                 nat[n] = 0;
  80         foreachship(sp) {
  81                 if (sp->file == NULL &&
  82                     (sp->file = calloc(1, sizeof (struct File))) == NULL) {
  83                         fprintf(stderr, "\nDRIVER: Out of memory.\n");
  84                         exit(1);
  85                 }
  86                 sp->file->index = sp - SHIP(0);
  87                 sp->file->loadL = L_ROUND;
  88                 sp->file->loadR = L_ROUND;
  89                 sp->file->readyR = R_LOADED|R_INITIAL;
  90                 sp->file->readyL = R_LOADED|R_INITIAL;
  91                 sp->file->stern = nat[sp->nationality]++;
  92                 sp->file->dir = sp->shipdir;
  93                 sp->file->row = sp->shiprow;
  94                 sp->file->col = sp->shipcol;
  95         }
  96         windspeed = cc->windspeed;
  97         winddir = cc->winddir;
  98         people = 0;
  99
 100         /* report back to the player process that we've started */
 101         if (driver_wait_fd >= 0) {
 102                 close(driver_wait_fd);
 103         }
 104
 105         for (;;) {
 106                 sleep(7);
 107                 if (Sync() < 0) {
 108                         value = 1;
 109                         break;
 110                 }
 111                 if (next() < 0)
 112                         break;
 113                 unfoul();
 114                 checkup();
 115                 prizecheck();
 116                 moveall();
 117                 thinkofgrapples();
 118                 boardcomp();
 119                 compcombat();
 120                 resolve();
 121                 reload();
 122                 checksails();
 123                 if (Sync() < 0) {
 124                         value = 1;
 125                         break;
 126                 }
 127         }
 128         sync_close(1);
 129         return value;
 130 }
 131
 132 void
 133 startdriver(void)
 134 {
 135         int fds[2];
 136         char c;
 137
 138         if (pipe(fds)) {
 139                 warn("pipe");
 140                 leave(LEAVE_FORK);
 141                 return;
 142         }
 143
 144         switch (fork()) {
 145             case 0:
 146                 close(fds[0]);
 147                 driver_wait_fd = fds[1];
 148                 longjmp(restart, MODE_DRIVER);
 149                 /*NOTREACHED*/
 150             case -1:
 151                 warn("fork");
 152                 close(fds[0]);
 153                 close(fds[1]);
 154                 leave(LEAVE_FORK);
 155                 break;
 156             default:
 157                 hasdriver++;
 158                 close(fds[1]);
 159                 read(fds[0], &c, 1);
 160                 close(fds[0]);
 161         }
 162 }