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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1987, 1993 The Regents of the University of California. All rights reserved.
30 * @(#)dm.c 8.1 (Berkeley) 5/31/93
31 * $FreeBSD: src/games/dm/dm.c,v 1.8 1999/12/10 02:54:18 billf Exp $
32 * $DragonFly: src/games/dm/dm.c,v 1.4 2006/08/08 17:05:14 pavalos Exp $
35 #include <sys/param.h>
38 #include <sys/resource.h>
49 #include "utmpentry.h"
51 #include "pathnames.h"
53 static time_t now; /* current time value */
54 static int priority = 0; /* priority game runs at */
55 static char *game, /* requested game */
56 *gametty; /* from tty? */
58 static void c_day(char *, char *, char *);
59 static void c_tty(char *);
60 static void c_game(char *, char *, char *, char *);
61 static void hour(int);
62 static double load(void);
63 static void nogamefile(void);
64 static void play(char **);
65 static void read_config(void);
66 static int users(void);
68 static void logfile(void);
72 main(__unused int argc, char *argv[])
77 game = (cp = strrchr(*argv, '/')) ? ++cp : *argv;
79 if (!strcmp(game, "dm"))
101 char pbuf[MAXPATHLEN];
103 if (sizeof(_PATH_HIDE) + strlen(game) > sizeof(pbuf)) {
104 fprintf(stderr, "dm: %s/%s: %s\n", _PATH_HIDE, game,
105 strerror(ENAMETOOLONG));
108 strcpy(pbuf, _PATH_HIDE);
109 strcpy(pbuf + sizeof(_PATH_HIDE) - 1, game);
110 if (priority > 0) /* < 0 requires root */
111 setpriority(PRIO_PROCESS, 0, priority);
113 fprintf(stderr, "dm: %s: %s\n", pbuf, strerror(errno));
119 * read through config file, looking for key words.
125 char lbuf[BUFSIZ], f1[40], f2[40], f3[40], f4[40], f5[40];
127 if (!(cfp = fopen(_PATH_CONFIG, "r")))
129 while (fgets(lbuf, sizeof(lbuf), cfp))
131 case 'b': /* badtty */
132 if (sscanf(lbuf, "%s%s", f1, f2) != 2 ||
133 strcasecmp(f1, "badtty"))
138 if (sscanf(lbuf, "%s%s%s%s%s",
139 f1, f2, f3, f4, f5) != 5 || strcasecmp(f1, "game"))
141 c_game(f2, f3, f4, f5);
144 if (sscanf(lbuf, "%s%s%s%s", f1, f2, f3, f4) != 4 ||
145 strcasecmp(f1, "time"))
154 * if day is today, see if okay to play
157 c_day(char *s_day, char *s_start, char *s_stop)
159 static const char *days[] = {
160 "sunday", "monday", "tuesday", "wednesday",
161 "thursday", "friday", "saturday",
163 static struct tm *ct;
167 ct = localtime(&now);
168 if (strcasecmp(s_day, days[ct->tm_wday]))
170 if (!isdigit(*s_start) || !isdigit(*s_stop))
172 start = atoi(s_start);
174 if (ct->tm_hour >= start && ct->tm_hour < stop) {
175 fputs("dm: Sorry, games are not available from ", stderr);
177 fputs(" to ", stderr);
179 fputs(" today.\n", stderr);
186 * decide if this tty can be used for games.
191 static int first = 1;
195 p_tty = strrchr(gametty, '/');
199 if (!strcmp(gametty, tty) || (p_tty && !strcmp(p_tty, tty))) {
200 fprintf(stderr, "dm: Sorry, you may not play games on %s.\n", gametty);
207 * see if game can be played now.
210 c_game(char *s_game, char *s_load, char *s_users, char *s_priority)
216 if (strcmp(game, s_game) && strcasecmp("default", s_game))
219 if (isdigit(*s_load) && atoi(s_load) < load()) {
220 fputs("dm: Sorry, the load average is too high right now.\n", stderr);
223 if (isdigit(*s_users) && atoi(s_users) <= users()) {
224 fputs("dm: Sorry, there are too many users logged on right now.\n", stderr);
227 if (isdigit(*s_priority))
228 priority = atoi(s_priority);
233 * return 15 minute load average
240 if (getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])) < 0) {
241 fputs("dm: getloadavg() failed.\n", stderr);
249 * return current number of users
250 * todo: check idle time; if idle more than X minutes, don't
256 struct utmpentry *ep;
259 getutentries(NULL, &ep);
260 for (; ep; ep = ep->next)
272 if ((fd = open(_PATH_NOGAMES, O_RDONLY, 0)) >= 0) {
273 #define MESG "Sorry, no games right now.\n\n"
274 write(2, MESG, sizeof(MESG) - 1);
275 while ((n = read(fd, buf, sizeof(buf))) > 0)
283 * print out the hour in human form
290 fputs("midnight", stderr);
293 fputs("noon", stderr);
297 fprintf(stderr, "%dpm", h - 12);
299 fprintf(stderr, "%dam", h);
316 if (lp = fopen(_PATH_LOG, "a")) {
317 for (lock_cnt = 0;; ++lock_cnt) {
318 if (!flock(fileno(lp), LOCK_EX))
321 perror("dm: log lock");
327 if (pw = getpwuid(uid = getuid()))
328 fputs(pw->pw_name, lp);
330 fprintf(lp, "%u", uid);
331 fprintf(lp, "\t%s\t%s\t%s", game, gametty, ctime(&now));
333 flock(fileno(lp), LOCK_UN);