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teach.c revision 1.9 
      1 /*	$NetBSD: teach.c,v 1.9 1999/07/19 00:34:00 hubertf 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 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) 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
     44 static char sccsid[] = "@(#)teach.c	8.1 (Berkeley) 5/31/93";
     45 #else
     46 __RCSID("$NetBSD: teach.c,v 1.9 1999/07/19 00:34:00 hubertf Exp $");
     47 #endif
     48 #endif				/* not lint */
     49 
     50 #include "back.h"
     51 #include "tutor.h"
     52 
     53 extern speed_t ospeed;		/* tty output speed for termlib */
     54 
     55 const char   *const 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 
     63 const char   *const contin[] = {
     64 	"",
     65 	0
     66 };
     67 
     68 int
     69 main(argc, argv)
     70 	int     argc;
     71 	char   *argv[];
     72 {
     73 	int     i;
     74 
     75 	/* revoke setgid privileges */
     76 	setregid(getgid(), getgid());
     77 
     78 	signal(SIGINT, getout);
     79 	if (tcgetattr(0, &old) == -1)	/* get old tty mode */
     80 		errexit("teachgammon(gtty)");
     81 	noech = old;
     82 	noech.c_lflag &= ~ECHO;
     83 	raw = noech;
     84 	raw.c_lflag &= ~ICANON;	/* set up modes */
     85 	ospeed = cfgetospeed(&old);	/* for termlib */
     86 	tflag = getcaps(getenv("TERM"));
     87 #ifdef V7
     88 	while (*++argv != 0)
     89 #else
     90 	while (*++argv != -1)
     91 #endif
     92 		getarg(&argv);
     93 	if (tflag) {
     94 		noech.c_oflag &= ~(ONLCR | OXTABS);
     95 		raw.c_oflag &= ~(ONLCR | OXTABS);
     96 		clear();
     97 	}
     98 	text(hello);
     99 	text(list);
    100 	i = text(contin);
    101 	if (i == 0)
    102 		i = 2;
    103 	init();
    104 	while (i)
    105 		switch (i) {
    106 		case 1:
    107 			leave();
    108 
    109 		case 2:
    110 			if ((i = text(intro1)) != 0)
    111 				break;
    112 			wrboard();
    113 			if ((i = text(intro2)) != 0)
    114 				break;
    115 
    116 		case 3:
    117 			if ((i = text(moves)) != 0)
    118 				break;
    119 
    120 		case 4:
    121 			if ((i = text(removepiece)) != 0)
    122 				break;
    123 
    124 		case 5:
    125 			if ((i = text(hits)) != 0)
    126 				break;
    127 
    128 		case 6:
    129 			if ((i = text(endgame)) != 0)
    130 				break;
    131 
    132 		case 7:
    133 			if ((i = text(doubl)) != 0)
    134 				break;
    135 
    136 		case 8:
    137 			if ((i = text(stragy)) != 0)
    138 				break;
    139 
    140 		case 9:
    141 			if ((i = text(prog)) != 0)
    142 				break;
    143 
    144 		case 10:
    145 			if ((i = text(lastch)) != 0)
    146 				break;
    147 		}
    148 	tutor();
    149 	/* NOTREACHED */
    150 	return (0);
    151 }
    152 
    153 void
    154 leave()
    155 {
    156 	if (tflag)
    157 		clear();
    158 	else
    159 		writec('\n');
    160 	fixtty(&old);
    161 	execl(EXEC, "backgammon", "-n", args[0]?args:0, 0);
    162 	writel("Help! Backgammon program is missing\007!!\n");
    163 	exit(-1);
    164 }
    165