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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1987, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)dm.c 8.1 (Berkeley) 5/31/93";
44 static const char rcsid[] =
48 #include <sys/param.h>
51 #include <sys/resource.h>
64 #include "pathnames.h"
66 static time_t now; /* current time value */
67 static int priority = 0; /* priority game runs at */
68 static char *game, /* requested game */
69 *gametty; /* from tty? */
71 void c_day __P((char *, char *, char *));
72 void c_tty __P((char *));
73 void c_game __P((char *, char *, char *, char *));
75 double load __P((void));
76 void nogamefile __P((void));
77 void play __P((char **));
78 void read_config __P((void));
79 int users __P((void));
89 game = (cp = strrchr(*argv, '/')) ? ++cp : *argv;
91 if (!strcmp(game, "dm"))
114 char pbuf[MAXPATHLEN];
116 if (sizeof(_PATH_HIDE) + strlen(game) > sizeof(pbuf)) {
117 (void)fprintf(stderr, "dm: %s/%s: %s\n", _PATH_HIDE, game,
118 strerror(ENAMETOOLONG));
121 (void)strcpy(pbuf, _PATH_HIDE);
122 (void)strcpy(pbuf + sizeof(_PATH_HIDE) - 1, game);
123 if (priority > 0) /* < 0 requires root */
124 (void)setpriority(PRIO_PROCESS, 0, priority);
126 (void)fprintf(stderr, "dm: %s: %s\n", pbuf, strerror(errno));
132 * read through config file, looking for key words.
138 char lbuf[BUFSIZ], f1[40], f2[40], f3[40], f4[40], f5[40];
140 if (!(cfp = fopen(_PATH_CONFIG, "r")))
142 while (fgets(lbuf, sizeof(lbuf), cfp))
144 case 'b': /* badtty */
145 if (sscanf(lbuf, "%s%s", f1, f2) != 2 ||
146 strcasecmp(f1, "badtty"))
151 if (sscanf(lbuf, "%s%s%s%s%s",
152 f1, f2, f3, f4, f5) != 5 || strcasecmp(f1, "game"))
154 c_game(f2, f3, f4, f5);
157 if (sscanf(lbuf, "%s%s%s%s", f1, f2, f3, f4) != 4 ||
158 strcasecmp(f1, "time"))
167 * if day is today, see if okay to play
170 c_day(s_day, s_start, s_stop)
171 char *s_day, *s_start, *s_stop;
173 static const char *days[] = {
174 "sunday", "monday", "tuesday", "wednesday",
175 "thursday", "friday", "saturday",
177 static struct tm *ct;
181 ct = localtime(&now);
182 if (strcasecmp(s_day, days[ct->tm_wday]))
184 if (!isdigit(*s_start) || !isdigit(*s_stop))
186 start = atoi(s_start);
188 if (ct->tm_hour >= start && ct->tm_hour < stop) {
189 (void)fputs("dm: Sorry, games are not available from ", stderr);
191 (void)fputs(" to ", stderr);
193 (void)fputs(" today.\n", stderr);
200 * decide if this tty can be used for games.
206 static int first = 1;
210 p_tty = strrchr(gametty, '/');
214 if (!strcmp(gametty, tty) || (p_tty && !strcmp(p_tty, tty))) {
215 (void)fprintf(stderr, "dm: Sorry, you may not play games on %s.\n", gametty);
222 * see if game can be played now.
225 c_game(s_game, s_load, s_users, s_priority)
226 char *s_game, *s_load, *s_users, *s_priority;
232 if (strcmp(game, s_game) && strcasecmp("default", s_game))
235 if (isdigit(*s_load) && atoi(s_load) < load()) {
236 (void)fputs("dm: Sorry, the load average is too high right now.\n", stderr);
239 if (isdigit(*s_users) && atoi(s_users) <= users()) {
240 (void)fputs("dm: Sorry, there are too many users logged on right now.\n", stderr);
243 if (isdigit(*s_priority))
244 priority = atoi(s_priority);
249 * return 15 minute load average
256 if (getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])) < 0) {
257 (void)fputs("dm: getloadavg() failed.\n", stderr);
265 * return current number of users
266 * todo: check idle time; if idle more than X minutes, don't
276 if ((utmp = open(_PATH_UTMP, O_RDONLY, 0)) < 0) {
277 (void)fprintf(stderr, "dm: %s: %s\n",
278 _PATH_UTMP, strerror(errno));
281 for (nusers = 0; read(utmp, (char *)&buf, sizeof(struct utmp)) > 0;)
282 if (buf.ut_name[0] != '\0')
293 if ((fd = open(_PATH_NOGAMES, O_RDONLY, 0)) >= 0) {
294 #define MESG "Sorry, no games right now.\n\n"
295 (void)write(2, MESG, sizeof(MESG) - 1);
296 while ((n = read(fd, buf, sizeof(buf))) > 0)
297 (void)write(2, buf, n);
304 * print out the hour in human form
312 (void)fputs("midnight", stderr);
315 (void)fputs("noon", stderr);
319 (void)fprintf(stderr, "%dpm", h - 12);
321 (void)fprintf(stderr, "%dam", h);
337 if (lp = fopen(_PATH_LOG, "a")) {
338 for (lock_cnt = 0;; ++lock_cnt) {
339 if (!flock(fileno(lp), LOCK_EX))
342 perror("dm: log lock");
348 if (pw = getpwuid(uid = getuid()))
349 fputs(pw->pw_name, lp);
351 fprintf(lp, "%u", uid);
352 fprintf(lp, "\t%s\t%s\t%s", game, gametty, ctime(&now));
354 (void)flock(fileno(lp), LOCK_UN);