games/backgammon/teachgammon/teach.c

   1 /*-
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1980, 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)teach.c  8.1 (Berkeley) 5/31/93
  31  * $FreeBSD: src/games/backgammon/teachgammon/teach.c,v 1.12 1999/11/30 03:48:30 billf Exp $
  32  */
  33
  34 #include <string.h>
  35 #include <sys/types.h>
  36 #include <termcap.h>
  37 #include <unistd.h>
  38 #include <signal.h>
  39 #include "back.h"
  40 #include "tutor.h"
  41
  42 const char *const helpm[] = {
  43         "\nEnter a space or newline to roll, or",
  44         "     b   to display the board",
  45         "     d   to double",
  46         "     q   to quit\n",
  47         0
  48 };
  49
  50 const char *const contin[] = {
  51         "",
  52         0
  53 };
  54
  55 int
  56 main(int argc, char *argv[])
  57 {
  58         int i;
  59
  60         /* revoke privs */
  61         setgid(getgid());
  62
  63         acnt = 1;
  64         signal(SIGINT, getout);
  65         if (tcgetattr(0, &tty) == -1)                   /* get old tty mode */
  66                 errexit("teachgammon(tcgetattr)");
  67         old = tty.c_lflag;
  68         bgraw = ((noech = old & ~ECHO) & ~ICANON);      /* set up modes */
  69         ospeed = cfgetospeed(&tty);                     /* for termlib */
  70         tflag = getcaps(getenv("TERM"));
  71         getarg(argc, argv);
  72         if (tflag) {
  73                 noech &= ~(ICRNL | OXTABS);
  74                 bgraw &= ~(ICRNL | OXTABS);
  75                 clear();
  76         }
  77         text(hello);
  78         text(list);
  79         i = text(contin);
  80         if (i == 0)
  81                 i = 2;
  82         init();
  83         while (i)
  84                 switch (i) {
  85                 case 1:
  86                         leave();
  87
  88                 case 2:
  89                         if ((i = text(intro1)) != 0)
  90                                 break;
  91                         wrboard();
  92                         if ((i = text(intro2)) != 0)
  93                                 break;
  94                         /* FALLTHROUGH */
  95                 case 3:
  96                         if ((i = text(moves)) != 0)
  97                                 break;
  98                         /* FALLTHROUGH */
  99                 case 4:
 100                         if ((i = text(remove)) != 0)
 101                                 break;
 102                         /* FALLTHROUGH */
 103                 case 5:
 104                         if ((i = text(hits)) != 0)
 105                                 break;
 106                         /* FALLTHROUGH */
 107                 case 6:
 108                         if ((i = text(endgame)) != 0)
 109                                 break;
 110                         /* FALLTHROUGH */
 111                 case 7:
 112                         if ((i = text(doubl)) != 0)
 113                                 break;
 114                         /* FALLTHROUGH */
 115                 case 8:
 116                         if ((i = text(stragy)) != 0)
 117                                 break;
 118                         /* FALLTHROUGH */
 119                 case 9:
 120                         if ((i = text(prog)) != 0)
 121                                 break;
 122                         /* FALLTHROUGH */
 123                 case 10:
 124                         if ((i = text(lastch)) != 0)
 125                                 break;
 126                 }
 127         tutor();
 128         /* NOTREACHED */
 129         return (0);
 130 }
 131
 132 void
 133 leave(void)
 134 {
 135         int i;
 136
 137         if (tflag)
 138                 clear();
 139         else
 140                 writec('\n');
 141         fixtty(old);
 142         args[0] = strdup("backgammon");
 143         args[acnt++] = strdup("-n");
 144         args[acnt] = 0;
 145         execv(EXEC, args);
 146         for (i = 0; i < acnt; i++)
 147                 free(args[i]);
 148         writel("Help! Backgammon program is missing\007!!\n");
 149         exit(-1);
 150 }