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 $ */
4 /* $DragonFly: src/games/hack/hack.unix.c,v 1.7 2006/08/21 19:45:32 pavalos Exp $ */
6 /* This file collects some Unix dependencies; hack.pager.c contains some more */
9 * The time is used for:
11 * - year on tombstone and yymmdd in record file
12 * - phase of the moon (various monsters react to NEW_MOON or FULL_MOON)
13 * - night and midnight (the undead are dangerous at midnight)
14 * - determination of what files are "very old"
20 #include <sys/types.h> /* for time_t and stat */
24 static struct tm *getlt(void);
25 static bool veryold(int);
27 static void newmail(void);
28 static void mdrush(struct monst *, bool);
43 return (localtime(&date));
49 return (1900 + getlt()->tm_year);
55 static char datestr[7];
56 struct tm *lt = getlt();
58 snprintf(datestr, sizeof(datestr), "%02d%02d%02d",
59 lt->tm_year % 100, lt->tm_mon + 1, lt->tm_mday);
64 phase_of_the_moon(void) /* 0-7, with 0: new, 4: full */
65 { /* moon period: 29.5306 days */
66 /* year: 365.2422 days */
67 struct tm *lt = getlt();
68 int epact, diy, golden;
71 golden = (lt->tm_year % 19) + 1;
72 epact = (11 * golden + 18) % 30;
73 if ((epact == 25 && golden > 11) || epact == 24)
76 return ((((((diy + epact) * 6) + 11) % 177) / 22) & 7);
82 int hour = getlt()->tm_hour;
84 return (hour < 6 || hour > 21);
90 return (getlt()->tm_hour == 0);
93 struct stat buf, hbuf;
96 gethdate(const char *name)
98 /* old version - for people short of space */
101 name = "/usr/games/hide/hack";
102 if (stat(name, &hbuf))
103 error("Cannot get status of %s.",
104 (np = strrchr(name, '/')) ? np + 1 : name);
110 if (fstat(fd, &buf)) {
111 pline("Cannot get status of saved level? ");
114 if (buf.st_mtime < hbuf.st_mtime) {
115 pline("Saved level is out of date. ");
121 /* see whether we should throw away this xlock file */
128 if (fstat(fd, &buf)) /* cannot get status */
130 if (buf.st_size != sizeof(int)) /* not an xlock file */
133 if (date - buf.st_mtime < 3L * 24L * 60L * 60L) { /* recent */
134 int lockedpid; /* should be the same size as hackpid */
136 if (read(fd, (char *)&lockedpid, sizeof(lockedpid)) !=
141 /* From: Rick Adams <seismo!rick> */
142 /* This will work on 4.1cbsd, 4.2bsd and system 3? & 5. */
143 /* It will do nothing on V7 or 4.1bsd. */
144 if (!(kill(lockedpid, 0) == -1 && errno == ESRCH))
148 for (i = 1; i <= MAXLEVEL; i++) { /* try to remove all */
153 if (unlink(lock)) /* cannot remove it */
155 return (1); /* success! */
165 /* we ignore QUIT and INT at this point */
166 if (link(HLOCK, LLOCK) == -1) {
170 printf("Cannot link %s to %s\n", LLOCK, HLOCK);
173 printf("Perhaps there is no (empty) file %s ?\n", HLOCK);
176 printf("It seems you don't have write permission here.\n");
179 printf("(Try again or rm %s.)\n", LLOCK);
182 printf("I don't know what is wrong.");
198 if ((fd = open(lock, O_RDONLY)) == -1) {
199 if (errno == ENOENT) /* no such file */
203 error("Cannot open %s", lock);
206 if (veryold(fd)) /* if true, this closes fd and unlinks lock */
209 } while (i < locknum);
212 error(locknum ? "Too many hacks running now."
213 : "There is a game in progress under your name.");
215 fd = creat(lock, FMASK);
216 if (unlink(LLOCK) == -1)
217 error("Cannot unlink %s.", LLOCK);
219 error("cannot creat lock file.");
221 if (write(fd, (char *)&hackpid, sizeof(hackpid))
223 error("cannot write lock");
225 error("cannot close lock");
232 * Notify user when new mail has arrived. [Idea from Merlyn Leroy, but
233 * I don't know the details of his implementation.]
234 * { Later note: he disliked my calling a general mailreader and felt that
235 * hack should do the paging itself. But when I get mail, I want to put it
236 * in some folder, reply, etc. - it would be unreasonable to put all these
237 * functions in hack. }
238 * The mail daemon '2' is at present not a real monster, but only a visual
239 * effect. Thus, makemon() is superfluous. This might become otherwise,
240 * however. The motion of '2' is less restrained than usual: diagonal moves
241 * from a DOOR are possible. He might also use SDOOR's. Also, '2' is visible
242 * in a ROOM, even when you are Blind.
243 * Its path should be longer when you are Telepat-hic and Blind.
245 * Interesting side effects:
246 * - You can get rich by sending yourself a lot of mail and selling
247 * it to the shopkeeper. Unfortunately mail isn't very valuable.
248 * - You might die in case '2' comes along at a critical moment during
249 * a fight and delivers a scroll the weight of which causes you to
252 * Possible extensions:
253 * - Open the file MAIL and do fstat instead of stat for efficiency.
254 * (But sh uses stat, so this cannot be too bad.)
255 * - Examine the mail and produce a scroll of mail called "From somebody".
256 * - Invoke MAILREADER in such a way that only this single letter is read.
258 * - Make him lose his mail when a Nymph steals the letter.
259 * - Do something to the text when the scroll is enchanted or cancelled.
261 #include "def.mkroom.h"
262 static struct stat omstat, nmstat;
263 static char *mailbox;
264 static long laststattime;
269 if (!(mailbox = getenv("MAIL")))
271 if (stat(mailbox, &omstat)) {
272 #ifdef PERMANENT_MAILBOX
273 pline("Cannot get status of MAIL=%s .", mailbox);
277 #endif /* PERMANENT_MAILBOX */
286 || moves < laststattime + MAILCKFREQ
287 #endif /* MAILCKFREQ */
290 laststattime = moves;
291 if (stat(mailbox, &nmstat)) {
292 #ifdef PERMANENT_MAILBOX
293 pline("Cannot get status of MAIL=%s anymore.", mailbox);
297 #endif /* PERMANENT_MAILBOX */
298 } else if (nmstat.st_mtime > omstat.st_mtime) {
301 getmailstatus(); /* might be too late ... */
308 /* produce a scroll of mail */
311 extern struct permonst pm_mail_daemon;
313 obj = mksobj(SCR_MAIL);
314 if (md = makemon(&pm_mail_daemon, u.ux, u.uy)) /* always succeeds */
317 pline("\"Hello, %s! I have some mail for you.\"", plname);
319 if (dist(md->mx, md->my) > 2)
323 /* let him disappear again */
329 identify(obj); /* set known and do prinv() */
332 /* make md run through the cave */
334 mdrush(struct monst *md, bool away)
336 int uroom = inroom(u.ux, u.uy);
339 int tmp = rooms[uroom].fdoor;
340 int cnt = rooms[uroom].doorct;
341 int fx = u.ux, fy = u.uy;
343 if (dist(fx, fy) < dist(doors[tmp].x, doors[tmp].y)) {
349 tmp_at(-1, md->data->mlet); /* open call */
350 if (away) { /* interchange origin and destination */
359 while (fx != md->mx || fy != md->my) {
360 int dx, dy, nfx = fx, nfy = fy, d1, d2;
363 d1 = DIST(fx, fy, md->mx, md->my);
364 for (dx = -1; dx <= 1; dx++)
365 for (dy = -1; dy <= 1; dy++)
367 d2 = DIST(fx + dx, fy + dy, md->mx, md->my);
374 if (nfx != fx || nfy != fy) {
385 tmp_at(-1, -1); /* close call */
394 #ifdef DEF_MAILREADER /* This implies that UNIX is defined */
398 if (!(mr = getenv("MAILREADER")))
404 #else /* DEF_MAILREADER */
405 page_file(mailbox, FALSE);
406 #endif /* DEF_MAILREADER */
407 /* get new stat; not entirely correct: there is a small time
408 * window where we do not see new mail */
414 regularize(char *s) /* normalize file name - we don't like ..'s or /'s */
418 while ((lp = strchr(s, '.')) || (lp = strchr(s, '/')))