1 /*	@(#)teach.c	8.1 (Berkeley) 5/31/93			*/
2 /*	$NetBSD: teach.c,v 1.25 2019/02/03 03:19:25 mrg Exp $	*/
3 
4 /*
5  * Copyright (c) 1980, 1993
6  *	The Regents of the University of California.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the University nor the names of its contributors
17  *    may be used to endorse or promote products derived from this software
18  *    without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30  * SUCH DAMAGE.
31  */
32 
33 #include "back.h"
34 #include "tutor.h"
35 
36 static const char *const contin[] = {
37 	"",
38 	0
39 };
40 
41 int
42 main(int argc __unused, char *argv[])
43 {
44 	int     i;
45 	struct move mmstore, *mm;
46 
47 	/* revoke setgid privileges */
48 	setgid(getgid());
49 
50 	signal(SIGINT, getout);
51 	if (tcgetattr(0, &old) == -1)	/* get old tty mode */
52 		errexit("teachgammon(gtty)");
53 	noech = old;
54 	noech.c_lflag &= ~ECHO;
55 	raw = noech;
56 	raw.c_lflag &= ~ICANON;	/* set up modes */
57 	ospeed = cfgetospeed(&old);	/* for termlib */
58 	tflag = getcaps(getenv("TERM"));
59 
60 	/* need this now beceause getarg() may try to load a game */
61 	mm = &mmstore;
62 	move_init(mm);
63 	while (*++argv != 0)
64 		getarg(mm, &argv);
65 	if (tflag) {
66 		noech.c_oflag &= ~(ONLCR | OXTABS);
67 		raw.c_oflag &= ~(ONLCR | OXTABS);
68 		clear();
69 	}
70 	wrtext(hello);
71 	wrtext(list);
72 	i = wrtext(contin);
73 	if (i == 0)
74 		i = 2;
75 	init();
76 	while (i)
77 		switch (i) {
78 		case 1:
79 			leave();
80 
81 		case 2:
82 			if ((i = wrtext(intro1)) != 0)
83 				break;
84 			wrboard();
85 			if ((i = wrtext(intro2)) != 0)
86 				break;
87 
88 			/* FALLTHROUGH */
89 		case 3:
90 			if ((i = wrtext(moves)) != 0)
91 				break;
92 
93 			/* FALLTHROUGH */
94 		case 4:
95 			if ((i = wrtext(removepiece)) != 0)
96 				break;
97 
98 			/* FALLTHROUGH */
99 		case 5:
100 			if ((i = wrtext(hits)) != 0)
101 				break;
102 
103 			/* FALLTHROUGH */
104 		case 6:
105 			if ((i = wrtext(endgame)) != 0)
106 				break;
107 
108 			/* FALLTHROUGH */
109 		case 7:
110 			if ((i = wrtext(doubl)) != 0)
111 				break;
112 
113 			/* FALLTHROUGH */
114 		case 8:
115 			if ((i = wrtext(stragy)) != 0)
116 				break;
117 
118 			/* FALLTHROUGH */
119 		case 9:
120 			if ((i = wrtext(prog)) != 0)
121 				break;
122 
123 			/* FALLTHROUGH */
124 		case 10:
125 			if ((i = wrtext(lastch)) != 0)
126 				break;
127 		}
128 	tutor(mm);
129 	/* NOTREACHED */
130 	return (0);
131 }
132 
133 void
134 leave(void)
135 {
136 	if (tflag)
137 		clear();
138 	else
139 		writec('\n');
140 	fixtty(&old);
141 	execl(EXEC, "backgammon", "-n", args[0]?args:0, (char *) 0);
142 	writel("Help! Backgammon program is missing\007!!\n");
143 	exit(1);
144 }
145