1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
2 /* hack.unix.c - version 1.0.3 */
3 /* $FreeBSD: src/games/hack/hack.unix.c,v 1.8 1999/11/16 02:57:13 billf Exp $ */
5 /* This file collects some Unix dependencies; hack.pager.c contains some more */
8 * The time is used for:
10 * - year on tombstone and yymmdd in record file
11 * - phase of the moon (various monsters react to NEW_MOON or FULL_MOON)
12 * - night and midnight (the undead are dangerous at midnight)
13 * - determination of what files are "very old"
19 #include <sys/types.h> /* for time_t and stat */
25 static struct tm
*getlt(void);
26 static bool veryold(int);
28 static void newmail(void);
29 static void mdrush(struct monst
*, bool);
44 return (localtime(&date
));
50 return (1900 + getlt()->tm_year
);
56 static char datestr
[7];
57 struct tm
*lt
= getlt();
59 snprintf(datestr
, sizeof(datestr
), "%02d%02d%02d",
60 lt
->tm_year
% 100, lt
->tm_mon
+ 1, lt
->tm_mday
);
65 phase_of_the_moon(void) /* 0-7, with 0: new, 4: full */
66 { /* moon period: 29.5306 days */
67 /* year: 365.2422 days */
68 struct tm
*lt
= getlt();
69 int epact
, diy
, golden
;
72 golden
= (lt
->tm_year
% 19) + 1;
73 epact
= (11 * golden
+ 18) % 30;
74 if ((epact
== 25 && golden
> 11) || epact
== 24)
77 return ((((((diy
+ epact
) * 6) + 11) % 177) / 22) & 7);
83 int hour
= getlt()->tm_hour
;
85 return (hour
< 6 || hour
> 21);
91 return (getlt()->tm_hour
== 0);
94 struct stat buf
, hbuf
;
97 gethdate(const char *name
)
101 char filename
[PATH_MAX
+1];
103 if (strchr(name
, '/') != NULL
|| (p
= getenv("PATH")) == NULL
)
105 np
= path
= strdup(p
); /* Make a copy for strsep. */
110 if ((p
= strsep(&np
, ":")) == NULL
)
112 if (*p
== '\0') /* :: */
113 (void) strlcpy(filename
, name
, sizeof filename
);
115 (void) snprintf(filename
, sizeof filename
,
118 if (stat(filename
, &hbuf
) == 0) {
123 error("Cannot get status of %s.",
124 (p
= strrchr(name
, '/')) ? p
+1 : name
);
131 if (fstat(fd
, &buf
)) {
132 pline("Cannot get status of saved level? ");
135 if (buf
.st_mtime
< hbuf
.st_mtime
) {
136 pline("Saved level is out of date. ");
142 /* see whether we should throw away this xlock file */
149 if (fstat(fd
, &buf
)) /* cannot get status */
151 if (buf
.st_size
!= sizeof(int)) /* not an xlock file */
154 if (date
- buf
.st_mtime
< 3L * 24L * 60L * 60L) { /* recent */
155 int lockedpid
; /* should be the same size as hackpid */
157 if (read(fd
, (char *)&lockedpid
, sizeof(lockedpid
)) !=
162 /* From: Rick Adams <seismo!rick> */
163 /* This will work on 4.1cbsd, 4.2bsd and system 3? & 5. */
164 /* It will do nothing on V7 or 4.1bsd. */
165 if (!(kill(lockedpid
, 0) == -1 && errno
== ESRCH
))
169 for (i
= 1; i
<= MAXLEVEL
; i
++) { /* try to remove all */
174 if (unlink(lock
)) /* cannot remove it */
176 return (1); /* success! */
186 /* we ignore QUIT and INT at this point */
187 if ((link(HLOCK
, LLOCK
) == -1) && (symlink(HLOCK
, LLOCK
) == -1)) {
191 printf("Cannot link %s to %s\n", LLOCK
, HLOCK
);
194 printf("Perhaps there is no (empty) file %s ?\n", HLOCK
);
197 printf("It seems you don't have write permission here.\n");
200 printf("(Try again or rm %s.)\n", LLOCK
);
203 printf("I don't know what is wrong.");
219 if ((fd
= open(lock
, O_RDONLY
)) == -1) {
220 if (errno
== ENOENT
) /* no such file */
224 error("Cannot open %s", lock
);
227 if (veryold(fd
)) /* if true, this closes fd and unlinks lock */
230 } while (i
< locknum
);
233 error(locknum
? "Too many hacks running now."
234 : "There is a game in progress under your name.");
236 fd
= creat(lock
, FMASK
);
237 if (unlink(LLOCK
) == -1)
238 error("Cannot unlink %s.", LLOCK
);
240 error("cannot creat lock file.");
242 if (write(fd
, (char *)&hackpid
, sizeof(hackpid
))
244 error("cannot write lock");
246 error("cannot close lock");
253 * Notify user when new mail has arrived. [Idea from Merlyn Leroy, but
254 * I don't know the details of his implementation.]
255 * { Later note: he disliked my calling a general mailreader and felt that
256 * hack should do the paging itself. But when I get mail, I want to put it
257 * in some folder, reply, etc. - it would be unreasonable to put all these
258 * functions in hack. }
259 * The mail daemon '2' is at present not a real monster, but only a visual
260 * effect. Thus, makemon() is superfluous. This might become otherwise,
261 * however. The motion of '2' is less restrained than usual: diagonal moves
262 * from a DOOR are possible. He might also use SDOOR's. Also, '2' is visible
263 * in a ROOM, even when you are Blind.
264 * Its path should be longer when you are Telepat-hic and Blind.
266 * Interesting side effects:
267 * - You can get rich by sending yourself a lot of mail and selling
268 * it to the shopkeeper. Unfortunately mail isn't very valuable.
269 * - You might die in case '2' comes along at a critical moment during
270 * a fight and delivers a scroll the weight of which causes you to
273 * Possible extensions:
274 * - Open the file MAIL and do fstat instead of stat for efficiency.
275 * (But sh uses stat, so this cannot be too bad.)
276 * - Examine the mail and produce a scroll of mail called "From somebody".
277 * - Invoke MAILREADER in such a way that only this single letter is read.
279 * - Make him lose his mail when a Nymph steals the letter.
280 * - Do something to the text when the scroll is enchanted or cancelled.
282 #include "def.mkroom.h"
283 static struct stat omstat
, nmstat
;
284 static char *mailbox
;
285 static long laststattime
;
290 if (!(mailbox
= getenv("MAIL")))
292 if (stat(mailbox
, &omstat
)) {
293 #ifdef PERMANENT_MAILBOX
294 pline("Cannot get status of MAIL=%s .", mailbox
);
298 #endif /* PERMANENT_MAILBOX */
307 || moves
< laststattime
+ MAILCKFREQ
308 #endif /* MAILCKFREQ */
311 laststattime
= moves
;
312 if (stat(mailbox
, &nmstat
)) {
313 #ifdef PERMANENT_MAILBOX
314 pline("Cannot get status of MAIL=%s anymore.", mailbox
);
318 #endif /* PERMANENT_MAILBOX */
319 } else if (nmstat
.st_mtime
> omstat
.st_mtime
) {
322 getmailstatus(); /* might be too late ... */
329 /* produce a scroll of mail */
332 extern struct permonst pm_mail_daemon
;
334 obj
= mksobj(SCR_MAIL
);
335 if (md
= makemon(&pm_mail_daemon
, u
.ux
, u
.uy
)) /* always succeeds */
338 pline("\"Hello, %s! I have some mail for you.\"", plname
);
340 if (dist(md
->mx
, md
->my
) > 2)
344 /* let him disappear again */
350 identify(obj
); /* set known and do prinv() */
353 /* make md run through the cave */
355 mdrush(struct monst
*md
, bool away
)
357 int uroom
= inroom(u
.ux
, u
.uy
);
360 int tmp
= rooms
[uroom
].fdoor
;
361 int cnt
= rooms
[uroom
].doorct
;
362 int fx
= u
.ux
, fy
= u
.uy
;
364 if (dist(fx
, fy
) < dist(doors
[tmp
].x
, doors
[tmp
].y
)) {
370 tmp_at(-1, md
->data
->mlet
); /* open call */
371 if (away
) { /* interchange origin and destination */
380 while (fx
!= md
->mx
|| fy
!= md
->my
) {
381 int dx
, dy
, nfx
= fx
, nfy
= fy
, d1
, d2
;
384 d1
= DIST(fx
, fy
, md
->mx
, md
->my
);
385 for (dx
= -1; dx
<= 1; dx
++)
386 for (dy
= -1; dy
<= 1; dy
++)
388 d2
= DIST(fx
+ dx
, fy
+ dy
, md
->mx
, md
->my
);
395 if (nfx
!= fx
|| nfy
!= fy
) {
406 tmp_at(-1, -1); /* close call */
415 #ifdef DEF_MAILREADER /* This implies that UNIX is defined */
419 if (!(mr
= getenv("MAILREADER")))
425 #else /* DEF_MAILREADER */
426 page_file(mailbox
, FALSE
);
427 #endif /* DEF_MAILREADER */
428 /* get new stat; not entirely correct: there is a small time
429 * window where we do not see new mail */
435 regularize(char *s
) /* normalize file name - we don't like ..'s or /'s */
439 while ((lp
= strchr(s
, '.')) || (lp
= strchr(s
, '/')))