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teach.c revision 1.26 
      1 /*	$NetBSD: teach.c,v 1.26 2024/08/22 20:46:40 rillig 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 1.26 2024/08/22 20:46:40 rillig Exp $");
     43 #endif
     44 #endif				/* not lint */
     45 
     46 #include "back.h"
     47 #include "tutor.h"
     48 
     49 static const char *const contin[] = {
     50 	"",
     51 	0
     52 };
     53 
     54 int
     55 main(int argc __unused, char *argv[])
     56 {
     57 	int     i;
     58 	struct move mmstore, *mm;
     59 
     60 	/* revoke setgid privileges */
     61 	setgid(getgid());
     62 
     63 	signal(SIGINT, getout);
     64 	if (tcgetattr(0, &old) == -1)	/* get old tty mode */
     65 		errexit("teachgammon(gtty)");
     66 	noech = old;
     67 	noech.c_lflag &= ~ECHO;
     68 	raw = noech;
     69 	raw.c_lflag &= ~ICANON;	/* set up modes */
     70 	ospeed = cfgetospeed(&old);	/* for termlib */
     71 	tflag = getcaps(getenv("TERM"));
     72 
     73 	/* need this now beceause getarg() may try to load a game */
     74 	mm = &mmstore;
     75 	move_init(mm);
     76 	while (*++argv != 0)
     77 		getarg(mm, &argv);
     78 	if (tflag) {
     79 		noech.c_oflag &= ~(ONLCR | OXTABS);
     80 		raw.c_oflag &= ~(ONLCR | OXTABS);
     81 		clear();
     82 	}
     83 	wrtext(hello);
     84 	wrtext(list);
     85 	i = wrtext(contin);
     86 	if (i == 0)
     87 		i = 2;
     88 	init();
     89 	while (i)
     90 		switch (i) {
     91 		case 1:
     92 			leave();
     93 			/* NOTREACHED */
     94 
     95 		case 2:
     96 			if ((i = wrtext(intro1)) != 0)
     97 				break;
     98 			wrboard();
     99 			if ((i = wrtext(intro2)) != 0)
    100 				break;
    101 
    102 			/* FALLTHROUGH */
    103 		case 3:
    104 			if ((i = wrtext(moves)) != 0)
    105 				break;
    106 
    107 			/* FALLTHROUGH */
    108 		case 4:
    109 			if ((i = wrtext(removepiece)) != 0)
    110 				break;
    111 
    112 			/* FALLTHROUGH */
    113 		case 5:
    114 			if ((i = wrtext(hits)) != 0)
    115 				break;
    116 
    117 			/* FALLTHROUGH */
    118 		case 6:
    119 			if ((i = wrtext(endgame)) != 0)
    120 				break;
    121 
    122 			/* FALLTHROUGH */
    123 		case 7:
    124 			if ((i = wrtext(doubl)) != 0)
    125 				break;
    126 
    127 			/* FALLTHROUGH */
    128 		case 8:
    129 			if ((i = wrtext(stragy)) != 0)
    130 				break;
    131 
    132 			/* FALLTHROUGH */
    133 		case 9:
    134 			if ((i = wrtext(prog)) != 0)
    135 				break;
    136 
    137 			/* FALLTHROUGH */
    138 		case 10:
    139 			if ((i = wrtext(lastch)) != 0)
    140 				break;
    141 		}
    142 	tutor(mm);
    143 	/* NOTREACHED */
    144 	return (0);
    145 }
    146 
    147 void
    148 leave(void)
    149 {
    150 	if (tflag)
    151 		clear();
    152 	else
    153 		writec('\n');
    154 	fixtty(&old);
    155 	execl(EXEC, "backgammon", "-n", args[0]?args:0, (char *) 0);
    156 	writel("Help! Backgammon program is missing\007!!\n");
    157 	exit(1);
    158 }
    159