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teach.c revision 1.20 
      1 /*	$NetBSD: teach.c,v 1.20 2009/08/12 05:17:57 dholland 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\
     35  The Regents of the University of California.  All rights reserved.");
     36 #endif				/* not lint */
     37 
     38 #ifndef lint
     39 #if 0
     40 static char sccsid[] = "@(#)teach.c	8.1 (Berkeley) 5/31/93";
     41 #else
     42 __RCSID("$NetBSD: teach.c,v 1.20 2009/08/12 05:17:57 dholland Exp $");
     43 #endif
     44 #endif				/* not lint */
     45 
     46 #include "back.h"
     47 #include "tutor.h"
     48 
     49 static const char *const helpm[] = {
     50 	"\nEnter a space or newline to roll, or",
     51 	"     b   to display the board",
     52 	"     d   to double",
     53 	"     q   to quit\n",
     54 	0
     55 };
     56 
     57 static const char *const contin[] = {
     58 	"",
     59 	0
     60 };
     61 
     62 int
     63 main(int argc __unused, char *argv[])
     64 {
     65 	int     i;
     66 
     67 	/* revoke setgid privileges */
     68 	setgid(getgid());
     69 
     70 	signal(SIGINT, getout);
     71 	if (tcgetattr(0, &old) == -1)	/* get old tty mode */
     72 		errexit("teachgammon(gtty)");
     73 	noech = old;
     74 	noech.c_lflag &= ~ECHO;
     75 	raw = noech;
     76 	raw.c_lflag &= ~ICANON;	/* set up modes */
     77 	ospeed = cfgetospeed(&old);	/* for termlib */
     78 	tflag = getcaps(getenv("TERM"));
     79 #ifdef V7
     80 	while (*++argv != 0)
     81 #else
     82 	while (*++argv != -1)
     83 #endif
     84 		getarg(&argv);
     85 	if (tflag) {
     86 		noech.c_oflag &= ~(ONLCR | OXTABS);
     87 		raw.c_oflag &= ~(ONLCR | OXTABS);
     88 		clear();
     89 	}
     90 	text(hello);
     91 	text(list);
     92 	i = text(contin);
     93 	if (i == 0)
     94 		i = 2;
     95 	init();
     96 	while (i)
     97 		switch (i) {
     98 		case 1:
     99 			leave();
    100 
    101 		case 2:
    102 			if ((i = text(intro1)) != 0)
    103 				break;
    104 			wrboard();
    105 			if ((i = text(intro2)) != 0)
    106 				break;
    107 
    108 		case 3:
    109 			if ((i = text(moves)) != 0)
    110 				break;
    111 
    112 		case 4:
    113 			if ((i = text(removepiece)) != 0)
    114 				break;
    115 
    116 		case 5:
    117 			if ((i = text(hits)) != 0)
    118 				break;
    119 
    120 		case 6:
    121 			if ((i = text(endgame)) != 0)
    122 				break;
    123 
    124 		case 7:
    125 			if ((i = text(doubl)) != 0)
    126 				break;
    127 
    128 		case 8:
    129 			if ((i = text(stragy)) != 0)
    130 				break;
    131 
    132 		case 9:
    133 			if ((i = text(prog)) != 0)
    134 				break;
    135 
    136 		case 10:
    137 			if ((i = text(lastch)) != 0)
    138 				break;
    139 		}
    140 	tutor();
    141 	/* NOTREACHED */
    142 	return (0);
    143 }
    144 
    145 void
    146 leave(void)
    147 {
    148 	if (tflag)
    149 		clear();
    150 	else
    151 		writec('\n');
    152 	fixtty(&old);
    153 	execl(EXEC, "backgammon", "-n", args[0]?args:0, (char *) 0);
    154 	writel("Help! Backgammon program is missing\007!!\n");
    155 	exit(1);
    156 }
    157