1/*	$NetBSD: main.c,v 1.19 2008/07/20 01:03:20 lukem Exp $	*/
2
3/*-
4 * Copyright (c) 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ed James.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35/*
36 * Copyright (c) 1987 by Ed James, UC Berkeley.  All rights reserved.
37 *
38 * Copy permission is hereby granted provided that this notice is
39 * retained on all partial or complete copies.
40 *
41 * For more info on this and all of my stuff, mail edjames@berkeley.edu.
42 */
43
44#include <sys/cdefs.h>
45#ifndef lint
46__COPYRIGHT("@(#) Copyright (c) 1990, 1993\
47 The Regents of the University of California.  All rights reserved.");
48#endif /* not lint */
49
50#ifndef lint
51#if 0
52static char sccsid[] = "@(#)main.c	8.1 (Berkeley) 5/31/93";
53#else
54__RCSID("$NetBSD: main.c,v 1.19 2008/07/20 01:03:20 lukem Exp $");
55#endif
56#endif /* not lint */
57
58#include "include.h"
59#include "pathnames.h"
60
61extern FILE	*yyin;
62
63static int read_file(const char *);
64static const char *default_game(void);
65static const char *okay_game(const char *);
66static int list_games(void);
67
68int
69main(int argc, char *argv[])
70{
71	unsigned long		seed;
72	int			f_usage = 0, f_list = 0, f_showscore = 0;
73	int			f_printpath = 0;
74	const char		*file = NULL;
75	int			ch;
76	struct sigaction	sa;
77#ifdef BSD
78	struct itimerval	itv;
79#endif
80
81	/* Open the score file then revoke setgid privileges */
82	open_score_file();
83	(void)setgid(getgid());
84
85	start_time = time(NULL);
86	seed = start_time;
87
88	while ((ch = getopt(argc, argv, ":u?lstpg:f:r:")) != -1) {
89		switch (ch) {
90		case '?':
91		case 'u':
92		default:
93			f_usage++;
94			break;
95		case 'l':
96			f_list++;
97			break;
98		case 's':
99		case 't':
100			f_showscore++;
101			break;
102		case 'p':
103			f_printpath++;
104			break;
105		case 'r':
106			seed = atoi(optarg);
107			break;
108		case 'f':
109		case 'g':
110			file = optarg;
111			break;
112		}
113	}
114	if (optind < argc)
115		f_usage++;
116	srandom(seed);
117
118	if (f_usage)
119		(void)fprintf(stderr,
120		    "Usage: %s -[u?lstp] [-[gf] game_name] [-r random seed]\n",
121		    argv[0]);
122	if (f_showscore)
123		(void)log_score(1);
124	if (f_list)
125		(void)list_games();
126	if (f_printpath) {
127		char	buf[100];
128
129		(void)strlcpy(buf, _PATH_GAMES, 100);
130		(void)puts(buf);
131	}
132
133	if (f_usage || f_showscore || f_list || f_printpath)
134		exit(0);
135
136	if (file == NULL)
137		file = default_game();
138	else
139		file = okay_game(file);
140
141	if (file == NULL || read_file(file) < 0)
142		exit(1);
143
144	init_gr();
145	setup_screen(sp);
146
147	(void)addplane();
148
149	(void)signal(SIGINT, quit);
150	(void)signal(SIGQUIT, quit);
151#ifdef BSD
152	(void)signal(SIGTSTP, SIG_IGN);
153#endif
154	(void)signal(SIGHUP, log_score_quit);
155	(void)signal(SIGTERM, log_score_quit);
156
157	(void)tcgetattr(fileno(stdin), &tty_start);
158	tty_new = tty_start;
159	tty_new.c_lflag &= ~(ICANON|ECHO);
160	tty_new.c_iflag |= ICRNL;
161	tty_new.c_cc[VMIN] = 1;
162	tty_new.c_cc[VTIME] = 0;
163	(void)tcsetattr(fileno(stdin), TCSADRAIN, &tty_new);
164
165	sa.sa_handler = update;
166	(void)sigemptyset(&sa.sa_mask);
167	(void)sigaddset(&sa.sa_mask, SIGALRM);
168	(void)sigaddset(&sa.sa_mask, SIGINT);
169	sa.sa_flags = 0;
170	(void)sigaction(SIGALRM, &sa, (struct sigaction *)0);
171
172#ifdef BSD
173	itv.it_value.tv_sec = 0;
174	itv.it_value.tv_usec = 1;
175	itv.it_interval.tv_sec = sp->update_secs;
176	itv.it_interval.tv_usec = 0;
177	(void)setitimer(ITIMER_REAL, &itv, NULL);
178#endif
179#ifdef SYSV
180	alarm(sp->update_secs);
181#endif
182
183	for (;;) {
184		if (getcommand() != 1)
185			planewin();
186		else {
187#ifdef BSD
188			itv.it_value.tv_sec = 0;
189			itv.it_value.tv_usec = 0;
190			(void)setitimer(ITIMER_REAL, &itv, NULL);
191#endif
192#ifdef SYSV
193			alarm(0);
194#endif
195
196			update(0);
197
198#ifdef BSD
199			itv.it_value.tv_sec = sp->update_secs;
200			itv.it_value.tv_usec = 0;
201			itv.it_interval.tv_sec = sp->update_secs;
202			itv.it_interval.tv_usec = 0;
203			(void)setitimer(ITIMER_REAL, &itv, NULL);
204#endif
205#ifdef SYSV
206			alarm(sp->update_secs);
207#endif
208		}
209	}
210}
211
212static int
213read_file(const char *s)
214{
215	int		retval;
216
217	filename = s;
218	yyin = fopen(s, "r");
219	if (yyin == NULL) {
220		warn("fopen %s", s);
221		return (-1);
222	}
223	retval = yyparse();
224	(void)fclose(yyin);
225
226	if (retval != 0)
227		return (-1);
228	else
229		return (0);
230}
231
232static const char *
233default_game(void)
234{
235	FILE		*fp;
236	static char	file[256];
237	char		line[256], games[256];
238
239	(void)strlcpy(games, _PATH_GAMES, 256);
240	(void)strlcat(games, GAMES, 256);
241
242	if ((fp = fopen(games, "r")) == NULL) {
243		warn("fopen %s", games);
244		return (NULL);
245	}
246	if (fgets(line, sizeof(line), fp) == NULL) {
247		(void)fprintf(stderr, "%s: no default game available\n", games);
248		fclose(fp);
249		return (NULL);
250	}
251	(void)fclose(fp);
252	line[strlen(line) - 1] = '\0';
253	(void)strlcpy(file, _PATH_GAMES, 256);
254	(void)strlcat(file, line, 256);
255	return (file);
256}
257
258static const char *
259okay_game(const char *s)
260{
261	FILE		*fp;
262	static char	file[256];
263	const char	*ret = NULL;
264	char		line[256], games[256];
265
266	(void)strlcpy(games, _PATH_GAMES, 256);
267	(void)strlcat(games, GAMES, 256);
268
269	if ((fp = fopen(games, "r")) == NULL) {
270		warn("fopen %s", games);
271		return (NULL);
272	}
273	while (fgets(line, sizeof(line), fp) != NULL) {
274		line[strlen(line) - 1] = '\0';
275		if (strcmp(s, line) == 0) {
276			(void)strlcpy(file, _PATH_GAMES, 256);
277			(void)strlcat(file, line, 256);
278			ret = file;
279			break;
280		}
281	}
282	(void)fclose(fp);
283	if (ret == NULL) {
284		test_mode = 1;
285		ret = s;
286		(void)fprintf(stderr, "%s: %s: game not found\n", games, s);
287		(void)fprintf(stderr, "Your score will not be logged.\n");
288		(void)sleep(2);	/* give the guy time to read it */
289	}
290	return (ret);
291}
292
293static int
294list_games(void)
295{
296	FILE		*fp;
297	char		line[256], games[256];
298	int		num_games = 0;
299
300	(void)strlcpy(games, _PATH_GAMES, 256);
301	(void)strlcat(games, GAMES, 256);
302
303	if ((fp = fopen(games, "r")) == NULL) {
304		warn("fopen %s", games);
305		return (-1);
306	}
307	(void)puts("available games:");
308	while (fgets(line, sizeof(line), fp) != NULL) {
309		(void)printf("	%s", line);
310		num_games++;
311	}
312	(void)fclose(fp);
313	if (num_games == 0) {
314		(void)fprintf(stderr, "%s: no games available\n", games);
315		return (-1);
316	}
317	return (0);
318}
319