teach.c revision 1.5 
1/*	$OpenBSD: teach.c,v 1.5 1998/08/29 23:19:12 pjanzen 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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#ifndef lint
37static char copyright[] =
38"@(#) Copyright (c) 1980, 1993\n\
39	The Regents of the University of California.  All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43#if 0
44static char sccsid[] = "@(#)teach.c	8.1 (Berkeley) 5/31/93";
45#else
46static char rcsid[] = "$OpenBSD: teach.c,v 1.5 1998/08/29 23:19:12 pjanzen Exp $";
47#endif
48#endif /* not lint */
49
50#include "back.h"
51#include "tutor.h"
52
53extern speed_t ospeed;		/* tty output speed for termlib */
54
55char   *helpm[] = {
56	"\nEnter a space or newline to roll, or",
57	"     b   to display the board",
58	"     d   to double",
59	"     q   to quit\n",
60	0
61};
62
63char   *contin[] = {
64	"",
65	0
66};
67
68int
69main(argc, argv)
70	int     argc;
71	char   *argv[];
72{
73	int     i;
74
75	/* revoke privs */
76	setegid(getgid());
77	setgid(getgid());
78
79	signal(SIGINT, getout);
80	if (tcgetattr(0, &old) == -1)	/* get old tty mode */
81		errexit("teachgammon(gtty)");
82	noech = old;
83	noech.c_lflag &= ~ECHO;
84	raw = noech;
85	raw.c_lflag &= ~ICANON;	/* set up modes */
86	ospeed = cfgetospeed(&old);	/* for termlib */
87	tflag = getcaps(getenv("TERM"));
88	getarg(argc, argv);
89	if (tflag) {
90		noech.c_oflag &= ~(ONLCR | OXTABS);
91		raw.c_oflag &= ~(ONLCR | OXTABS);
92		clear();
93	}
94	text(hello);
95	text(list);
96	i = text(contin);
97	if (i == 0)
98		i = 2;
99	init();
100	while (i)
101		switch (i) {
102		case 1:
103			leave();	/* Does not return */
104			break;
105
106		case 2:
107			if (i = text(intro1))
108				break;
109			wrboard();
110			if (i = text(intro2))
111				break;
112
113		case 3:
114			if (i = text(moves))
115				break;
116
117		case 4:
118			if (i = text(removepiece))
119				break;
120
121		case 5:
122			if (i = text(hits))
123				break;
124
125		case 6:
126			if (i = text(endgame))
127				break;
128
129		case 7:
130			if (i = text(doubl))
131				break;
132
133		case 8:
134			if (i = text(stragy))
135				break;
136
137		case 9:
138			if (i = text(prog))
139				break;
140
141		case 10:
142			if (i = text(lastch))
143				break;
144		}
145	tutor();
146	/* NOT REACHED */
147}
148
149void
150leave()
151{
152	if (tflag)
153		clear();
154	else
155		writec('\n');
156	fixtty(&old);
157	execl(EXEC, "backgammon", args, "n", 0);
158	writel("Help! Backgammon program is missing\007!!\n");
159	exit(-1);
160}
161