554eb505f8
of the x11 based games. I'm not going to tag the originals with bsd_44_lite and do this in two stages since it's just not worth it for this collection, and I've got directory renames to deal with that way. Bleah. Submitted by: jkh
330 lines
7.3 KiB
C
330 lines
7.3 KiB
C
/*
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* Copyright (c) 1987, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1987, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)dm.c 8.1 (Berkeley) 5/31/93";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <ctype.h>
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#include <nlist.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <utmp.h>
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#include "pathnames.h"
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extern int errno;
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static time_t now; /* current time value */
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static int priority = 0; /* priority game runs at */
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static char *game, /* requested game */
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*gametty; /* from tty? */
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char *cp;
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nogamefile();
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game = (cp = rindex(*argv, '/')) ? ++cp : *argv;
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if (!strcmp(game, "dm"))
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exit(0);
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gametty = ttyname(0);
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(void)time(&now);
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read_config();
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#ifdef LOG
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logfile();
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#endif
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play(argv);
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/*NOTREACHED*/
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}
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/*
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* play --
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* play the game
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*/
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play(args)
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char **args;
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{
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char pbuf[MAXPATHLEN];
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(void)strcpy(pbuf, _PATH_HIDE);
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(void)strcpy(pbuf + sizeof(_PATH_HIDE) - 1, game);
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if (priority > 0) /* < 0 requires root */
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(void)setpriority(PRIO_PROCESS, 0, priority);
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setgid(getgid()); /* we run setgid kmem; lose it */
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execv(pbuf, args);
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(void)fprintf(stderr, "dm: %s: %s\n", pbuf, strerror(errno));
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exit(1);
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}
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/*
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* read_config --
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* read through config file, looking for key words.
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*/
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read_config()
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{
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FILE *cfp;
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char lbuf[BUFSIZ], f1[40], f2[40], f3[40], f4[40], f5[40];
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if (!(cfp = fopen(_PATH_CONFIG, "r")))
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return;
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while (fgets(lbuf, sizeof(lbuf), cfp))
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switch(*lbuf) {
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case 'b': /* badtty */
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if (sscanf(lbuf, "%s%s", f1, f2) != 2 ||
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strcasecmp(f1, "badtty"))
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break;
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c_tty(f2);
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break;
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case 'g': /* game */
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if (sscanf(lbuf, "%s%s%s%s%s",
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f1, f2, f3, f4, f5) != 5 || strcasecmp(f1, "game"))
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break;
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c_game(f2, f3, f4, f5);
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break;
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case 't': /* time */
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if (sscanf(lbuf, "%s%s%s%s", f1, f2, f3, f4) != 4 ||
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strcasecmp(f1, "time"))
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break;
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c_day(f2, f3, f4);
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}
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(void)fclose(cfp);
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}
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/*
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* c_day --
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* if day is today, see if okay to play
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*/
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c_day(s_day, s_start, s_stop)
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char *s_day, *s_start, *s_stop;
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{
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static char *days[] = {
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"sunday", "monday", "tuesday", "wednesday",
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"thursday", "friday", "saturday",
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};
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static struct tm *ct;
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int start, stop;
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if (!ct)
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ct = localtime(&now);
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if (strcasecmp(s_day, days[ct->tm_wday]))
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return;
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if (!isdigit(*s_start) || !isdigit(*s_stop))
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return;
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start = atoi(s_start);
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stop = atoi(s_stop);
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if (ct->tm_hour >= start && ct->tm_hour < stop) {
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fputs("dm: Sorry, games are not available from ", stderr);
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hour(start);
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fputs(" to ", stderr);
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hour(stop);
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fputs(" today.\n", stderr);
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exit(0);
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}
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}
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/*
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* c_tty --
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* decide if this tty can be used for games.
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*/
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c_tty(tty)
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char *tty;
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{
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static int first = 1;
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static char *p_tty;
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if (first) {
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p_tty = rindex(gametty, '/');
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first = 0;
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}
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if (!strcmp(gametty, tty) || p_tty && !strcmp(p_tty, tty)) {
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fprintf(stderr, "dm: Sorry, you may not play games on %s.\n", gametty);
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exit(0);
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}
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}
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/*
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* c_game --
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* see if game can be played now.
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*/
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c_game(s_game, s_load, s_users, s_priority)
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char *s_game, *s_load, *s_users, *s_priority;
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{
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static int found;
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double load();
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if (found)
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return;
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if (strcmp(game, s_game) && strcasecmp("default", s_game))
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return;
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++found;
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if (isdigit(*s_load) && atoi(s_load) < load()) {
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fputs("dm: Sorry, the load average is too high right now.\n", stderr);
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exit(0);
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}
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if (isdigit(*s_users) && atoi(s_users) <= users()) {
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fputs("dm: Sorry, there are too many users logged on right now.\n", stderr);
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exit(0);
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}
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if (isdigit(*s_priority))
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priority = atoi(s_priority);
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}
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/*
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* load --
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* return 15 minute load average
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*/
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double
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load()
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{
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double avenrun[3];
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if (getloadavg(avenrun, sizeof(avenrun)/sizeof(avenrun[0])) < 0) {
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fputs("dm: getloadavg() failed.\n", stderr);
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exit(1);
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}
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return(avenrun[2]);
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}
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/*
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* users --
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* return current number of users
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* todo: check idle time; if idle more than X minutes, don't
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* count them.
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*/
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users()
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{
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register int nusers, utmp;
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struct utmp buf;
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if ((utmp = open(_PATH_UTMP, O_RDONLY, 0)) < 0) {
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(void)fprintf(stderr, "dm: %s: %s\n",
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_PATH_UTMP, strerror(errno));
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exit(1);
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}
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for (nusers = 0; read(utmp, (char *)&buf, sizeof(struct utmp)) > 0;)
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if (buf.ut_name[0] != '\0')
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++nusers;
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return(nusers);
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}
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nogamefile()
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{
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register int fd, n;
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char buf[BUFSIZ];
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if ((fd = open(_PATH_NOGAMES, O_RDONLY, 0)) >= 0) {
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#define MESG "Sorry, no games right now.\n\n"
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(void)write(2, MESG, sizeof(MESG) - 1);
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while ((n = read(fd, buf, sizeof(buf))) > 0)
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(void)write(2, buf, n);
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exit(1);
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}
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}
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/*
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* hour --
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* print out the hour in human form
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*/
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hour(h)
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int h;
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{
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switch(h) {
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case 0:
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fputs("midnight", stderr);
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break;
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case 12:
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fputs("noon", stderr);
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break;
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default:
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if (h > 12)
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fprintf(stderr, "%dpm", h - 12);
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else
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fprintf(stderr, "%dam", h);
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}
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}
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#ifdef LOG
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/*
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* logfile --
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* log play of game
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*/
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logfile()
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{
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struct passwd *pw;
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FILE *lp;
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uid_t uid;
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int lock_cnt;
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if (lp = fopen(_PATH_LOG, "a")) {
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for (lock_cnt = 0;; ++lock_cnt) {
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if (!flock(fileno(lp), LOCK_EX))
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break;
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if (lock_cnt == 4) {
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perror("dm: log lock");
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(void)fclose(lp);
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return;
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}
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sleep((u_int)1);
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}
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if (pw = getpwuid(uid = getuid()))
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fputs(pw->pw_name, lp);
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else
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fprintf(lp, "%u", uid);
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fprintf(lp, "\t%s\t%s\t%s", game, gametty, ctime(&now));
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(void)fclose(lp);
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(void)flock(fileno(lp), LOCK_UN);
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}
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}
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#endif /* LOG */
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