* Copyright (c) 1987 Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
"@(#) Copyright (c) 1987 Regents of the University of California.\n\
static char sccsid
[] = "@(#)dm.c 5.16 (Berkeley) 2/28/91";
#include <sys/resource.h>
static time_t now
; /* current time value */
static int priority
= 0; /* priority game runs at */
static char *game
, /* requested game */
*gametty
; /* from tty? */
char *cp
, *rindex(), *ttyname();
game
= (cp
= rindex(*argv
, '/')) ? ++cp
: *argv
;
char pbuf
[MAXPATHLEN
], *strcpy(), *strerror();
(void)strcpy(pbuf
, _PATH_HIDE
);
(void)strcpy(pbuf
+ sizeof(_PATH_HIDE
) - 1, game
);
if (priority
> 0) /* < 0 requires root */
(void)setpriority(PRIO_PROCESS
, 0, priority
);
setgid(getgid()); /* we run setgid kmem; lose it */
(void)fprintf(stderr
, "dm: %s: %s\n", pbuf
, strerror(errno
));
* read through config file, looking for key words.
char lbuf
[BUFSIZ
], f1
[40], f2
[40], f3
[40], f4
[40], f5
[40];
if (!(cfp
= fopen(_PATH_CONFIG
, "r")))
while (fgets(lbuf
, sizeof(lbuf
), cfp
))
if (sscanf(lbuf
, "%s%s", f1
, f2
) != 2 ||
strcasecmp(f1
, "badtty"))
if (sscanf(lbuf
, "%s%s%s%s%s",
f1
, f2
, f3
, f4
, f5
) != 5 || strcasecmp(f1
, "game"))
if (sscanf(lbuf
, "%s%s%s%s", f1
, f2
, f3
, f4
) != 4 ||
* if day is today, see if okay to play
c_day(s_day
, s_start
, s_stop
)
char *s_day
, *s_start
, *s_stop
;
"sunday", "monday", "tuesday", "wednesday",
"thursday", "friday", "saturday",
if (strcasecmp(s_day
, days
[ct
->tm_wday
]))
if (!isdigit(*s_start
) || !isdigit(*s_stop
))
if (ct
->tm_hour
>= start
&& ct
->tm_hour
< stop
) {
fputs("dm: Sorry, games are not available from ", stderr
);
fputs(" today.\n", stderr
);
* decide if this tty can be used for games.
p_tty
= rindex(gametty
, '/');
if (!strcmp(gametty
, tty
) || p_tty
&& !strcmp(p_tty
, tty
)) {
fprintf(stderr
, "dm: Sorry, you may not play games on %s.\n", gametty
);
* see if game can be played now.
c_game(s_game
, s_load
, s_users
, s_priority
)
char *s_game
, *s_load
, *s_users
, *s_priority
;
if (strcmp(game
, s_game
) && strcasecmp("default", s_game
))
if (isdigit(*s_load
) && atoi(s_load
) < load()) {
fputs("dm: Sorry, the load average is too high right now.\n", stderr
);
if (isdigit(*s_users
) && atoi(s_users
) <= users()) {
fputs("dm: Sorry, there are too many users logged on right now.\n", stderr
);
if (isdigit(*s_priority
))
priority
= atoi(s_priority
);
* return 15 minute load average
if (getloadavg(avenrun
, sizeof(avenrun
)/sizeof(avenrun
[0])) < 0) {
fputs("dm: getloadavg() failed.\n", stderr
);
* return current number of users
* todo: check idle time; if idle more than X minutes, don't
register int nusers
, utmp
;
if ((utmp
= open(_PATH_UTMP
, O_RDONLY
, 0)) < 0) {
(void)fprintf(stderr
, "dm: %s: %s\n",
_PATH_UTMP
, strerror(errno
));
for (nusers
= 0; read(utmp
, (char *)&buf
, sizeof(struct utmp
)) > 0;)
if (buf
.ut_name
[0] != '\0')
if ((fd
= open(_PATH_NOGAMES
, O_RDONLY
, 0)) >= 0) {
#define MESG "Sorry, no games right now.\n\n"
(void)write(2, MESG
, sizeof(MESG
) - 1);
while ((n
= read(fd
, buf
, sizeof(buf
))) > 0)
* print out the hour in human form
fputs("midnight", stderr
);
fprintf(stderr
, "%dpm", h
- 12);
fprintf(stderr
, "%dam", h
);
struct passwd
*pw
, *getpwuid();
if (lp
= fopen(_PATH_LOG
, "a")) {
for (lock_cnt
= 0;; ++lock_cnt
) {
if (!flock(fileno(lp
), LOCK_EX
))
if (pw
= getpwuid(uid
= getuid()))
fprintf(lp
, "\t%s\t%s\t%s", game
, gametty
, ctime(&now
));
(void)flock(fileno(lp
), LOCK_UN
);