2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1987, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)dm.c 8.1 (Berkeley) 5/31/93
35 * $FreeBSD: src/games/dm/dm.c,v 1.8 1999/12/10 02:54:18 billf Exp $
36 * $DragonFly: src/games/dm/dm.c,v 1.3 2003/11/12 14:53:52 eirikn Exp $
39 #include <sys/param.h>
42 #include <sys/resource.h>
55 #include "pathnames.h"
57 static time_t now; /* current time value */
58 static int priority = 0; /* priority game runs at */
59 static char *game, /* requested game */
60 *gametty; /* from tty? */
62 void c_day (char *, char *, char *);
64 void c_game (char *, char *, char *, char *);
67 void nogamefile (void);
69 void read_config (void);
80 game = (cp = strrchr(*argv, '/')) ? ++cp : *argv;
82 if (!strcmp(game, "dm"))
105 char pbuf[MAXPATHLEN];
107 if (sizeof(_PATH_HIDE) + strlen(game) > sizeof(pbuf)) {
108 (void)fprintf(stderr, "dm: %s/%s: %s\n", _PATH_HIDE, game,
109 strerror(ENAMETOOLONG));
112 (void)strcpy(pbuf, _PATH_HIDE);
113 (void)strcpy(pbuf + sizeof(_PATH_HIDE) - 1, game);
114 if (priority > 0) /* < 0 requires root */
115 (void)setpriority(PRIO_PROCESS, 0, priority);
117 (void)fprintf(stderr, "dm: %s: %s\n", pbuf, strerror(errno));
123 * read through config file, looking for key words.
129 char lbuf[BUFSIZ], f1[40], f2[40], f3[40], f4[40], f5[40];
131 if (!(cfp = fopen(_PATH_CONFIG, "r")))
133 while (fgets(lbuf, sizeof(lbuf), cfp))
135 case 'b': /* badtty */
136 if (sscanf(lbuf, "%s%s", f1, f2) != 2 ||
137 strcasecmp(f1, "badtty"))
142 if (sscanf(lbuf, "%s%s%s%s%s",
143 f1, f2, f3, f4, f5) != 5 || strcasecmp(f1, "game"))
145 c_game(f2, f3, f4, f5);
148 if (sscanf(lbuf, "%s%s%s%s", f1, f2, f3, f4) != 4 ||
149 strcasecmp(f1, "time"))
158 * if day is today, see if okay to play
161 c_day(s_day, s_start, s_stop)
162 char *s_day, *s_start, *s_stop;
164 static const char *days[] = {
165 "sunday", "monday", "tuesday", "wednesday",
166 "thursday", "friday", "saturday",
168 static struct tm *ct;
172 ct = localtime(&now);
173 if (strcasecmp(s_day, days[ct->tm_wday]))
175 if (!isdigit(*s_start) || !isdigit(*s_stop))
177 start = atoi(s_start);
179 if (ct->tm_hour >= start && ct->tm_hour < stop) {
180 (void)fputs("dm: Sorry, games are not available from ", stderr);
182 (void)fputs(" to ", stderr);
184 (void)fputs(" today.\n", stderr);
191 * decide if this tty can be used for games.
197 static int first = 1;
201 p_tty = strrchr(gametty, '/');
205 if (!strcmp(gametty, tty) || (p_tty && !strcmp(p_tty, tty))) {
206 (void)fprintf(stderr, "dm: Sorry, you may not play games on %s.\n", gametty);
213 * see if game can be played now.
216 c_game(s_game, s_load, s_users, s_priority)
217 char *s_game, *s_load, *s_users, *s_priority;
223 if (strcmp(game, s_game) && strcasecmp("default", s_game))
226 if (isdigit(*s_load) && atoi(s_load) < load()) {
227 (void)fputs("dm: Sorry, the load average is too high right now.\n", stderr);
230 if (isdigit(*s_users) && atoi(s_users) <= users()) {
231 (void)fputs("dm: Sorry, there are too many users logged on right now.\n", stderr);
234 if (isdigit(*s_priority))
235 priority = atoi(s_priority);
240 * return 15 minute load average
247 if (getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])) < 0) {
248 (void)fputs("dm: getloadavg() failed.\n", stderr);
256 * return current number of users
257 * todo: check idle time; if idle more than X minutes, don't
267 if ((utmp = open(_PATH_UTMP, O_RDONLY, 0)) < 0) {
268 (void)fprintf(stderr, "dm: %s: %s\n",
269 _PATH_UTMP, strerror(errno));
272 for (nusers = 0; read(utmp, (char *)&buf, sizeof(struct utmp)) > 0;)
273 if (buf.ut_name[0] != '\0')
284 if ((fd = open(_PATH_NOGAMES, O_RDONLY, 0)) >= 0) {
285 #define MESG "Sorry, no games right now.\n\n"
286 (void)write(2, MESG, sizeof(MESG) - 1);
287 while ((n = read(fd, buf, sizeof(buf))) > 0)
288 (void)write(2, buf, n);
295 * print out the hour in human form
303 (void)fputs("midnight", stderr);
306 (void)fputs("noon", stderr);
310 (void)fprintf(stderr, "%dpm", h - 12);
312 (void)fprintf(stderr, "%dam", h);
328 if (lp = fopen(_PATH_LOG, "a")) {
329 for (lock_cnt = 0;; ++lock_cnt) {
330 if (!flock(fileno(lp), LOCK_EX))
333 perror("dm: log lock");
339 if (pw = getpwuid(uid = getuid()))
340 fputs(pw->pw_name, lp);
342 fprintf(lp, "%u", uid);
343 fprintf(lp, "\t%s\t%s\t%s", game, gametty, ctime(&now));
345 (void)flock(fileno(lp), LOCK_UN);