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  * $DragonFly: src/games/backgammon/teachgammon/teach.c,v 1.3 2006/08/08 16:36:11 pavalos Exp $
  33  */
  34
  35 #include <string.h>
  36 #include <sys/types.h>
  37 #include <termcap.h>
  38 #include <unistd.h>
  39 #include <signal.h>
  40 #include "back.h"
  41 #include "tutor.h"
  42
  43 const char *const helpm[] = {
  44         "\nEnter a space or newline to roll, or",
  45         "     b   to display the board",
  46         "     d   to double",
  47         "     q   to quit\n",
  48         0
  49 };
  50
  51 const char *const contin[] = {
  52         "",
  53         0
  54 };
  55
  56 int
  57 main(int argc, char **argv)
  58 {
  59         int i;
  60
  61         /* revoke privs */
  62         setgid(getgid());
  63
  64         acnt = 1;
  65         signal(SIGINT, (sig_t)getout);
  66         if (tcgetattr(0, &tty) == -1)                   /* get old tty mode */
  67                 errexit("teachgammon(tcgetattr)");
  68         old = tty.c_lflag;
  69         raw = ((noech = old & ~ECHO) & ~ICANON);        /* set up modes */
  70         ospeed = cfgetospeed(&tty);                     /* for termlib */
  71         tflag = getcaps(getenv("TERM"));
  72         getarg(argc, argv);
  73         if (tflag) {
  74                 noech &= ~(ICRNL | OXTABS);
  75                 raw &= ~(ICRNL | OXTABS);
  76                 clear();
  77         }
  78         text(hello);
  79         text(list);
  80         i = text(contin);
  81         if (i == 0)
  82                 i = 2;
  83         init();
  84         while (i)
  85                 switch (i) {
  86                 case 1:
  87                         leave();
  88
  89                 case 2:
  90                         if ((i = text(intro1)) != 0)
  91                                 break;
  92                         wrboard();
  93                         if ((i = text(intro2)) != 0)
  94                                 break;
  95
  96                 case 3:
  97                         if ((i = text(moves)) != 0)
  98                                 break;
  99
 100                 case 4:
 101                         if ((i = text(remove)) != 0)
 102                                 break;
 103
 104                 case 5:
 105                         if ((i = text(hits)) != 0)
 106                                 break;
 107
 108                 case 6:
 109                         if ((i = text(endgame)) != 0)
 110                                 break;
 111
 112                 case 7:
 113                         if ((i = text(doubl)) != 0)
 114                                 break;
 115
 116                 case 8:
 117                         if ((i = text(stragy)) != 0)
 118                                 break;
 119
 120                 case 9:
 121                         if ((i = text(prog)) != 0)
 122                                 break;
 123
 124                 case 10:
 125                         if ((i = text(lastch)) != 0)
 126                                 break;
 127                 }
 128         tutor();
 129         /* NOTREACHED */
 130         return (0);
 131 }
 132
 133 void
 134 leave(void)
 135 {
 136         int i;
 137
 138         if (tflag)
 139                 clear();
 140         else
 141                 writec('\n');
 142         fixtty(old);
 143         args[0] = strdup("backgammon");
 144         args[acnt++] = strdup("-n");
 145         args[acnt] = 0;
 146         execv(EXEC, args);
 147         for (i = 0; i < acnt; i++)
 148                 free(args[i]);
 149         writel("Help! Backgammon program is missing\007!!\n");
 150         exit(-1);
 151 }