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