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), "%02hu%02hu%02hu",
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 strlcpy(filename, name, sizeof filename);
115 snprintf(filename, sizeof filename, "%s/%s", p, name);
117 if (stat(filename, &hbuf) == 0) {
122 error("Cannot get status of %s.",
123 (p = strrchr(name, '/')) ? p+1 : name);
130 if (fstat(fd, &buf)) {
131 pline("Cannot get status of saved level? ");
134 if (buf.st_mtime < hbuf.st_mtime) {
135 pline("Saved level is out of date. ");
141 /* see whether we should throw away this xlock file */
148 if (fstat(fd, &buf)) /* cannot get status */
150 if (buf.st_size != sizeof(int)) /* not an xlock file */
153 if (date - buf.st_mtime < 3L * 24L * 60L * 60L) { /* recent */
154 int lockedpid; /* should be the same size as hackpid */
156 if (read(fd, (char *)&lockedpid, sizeof(lockedpid)) !=
161 /* From: Rick Adams <seismo!rick> */
162 /* This will work on 4.1cbsd, 4.2bsd and system 3? & 5. */
163 /* It will do nothing on V7 or 4.1bsd. */
164 if (!(kill(lockedpid, 0) == -1 && errno == ESRCH))
168 for (i = 1; i <= MAXLEVEL; i++) { /* try to remove all */
173 if (unlink(lock)) /* cannot remove it */
175 return (1); /* success! */
185 /* we ignore QUIT and INT at this point */
186 if ((link(HLOCK, LLOCK) == -1) && (symlink(HLOCK, LLOCK) == -1)) {
190 printf("Cannot link %s to %s\n", LLOCK, HLOCK);
193 printf("Perhaps there is no (empty) file %s ?\n", HLOCK);
196 printf("It seems you don't have write permission here.\n");
199 printf("(Try again or rm %s.)\n", LLOCK);
202 printf("I don't know what is wrong.");
218 if ((fd = open(lock, O_RDONLY)) == -1) {
219 if (errno == ENOENT) /* no such file */
223 error("Cannot open %s", lock);
226 if (veryold(fd)) /* if true, this closes fd and unlinks lock */
229 } while (i < locknum);
232 error(locknum ? "Too many hacks running now."
233 : "There is a game in progress under your name.");
235 fd = creat(lock, FMASK);
236 if (unlink(LLOCK) == -1)
237 error("Cannot unlink %s.", LLOCK);
239 error("cannot creat lock file.");
241 if (write(fd, (char *)&hackpid, sizeof(hackpid))
243 error("cannot write lock");
245 error("cannot close lock");
252 * Notify user when new mail has arrived. [Idea from Merlyn Leroy, but
253 * I don't know the details of his implementation.]
254 * { Later note: he disliked my calling a general mailreader and felt that
255 * hack should do the paging itself. But when I get mail, I want to put it
256 * in some folder, reply, etc. - it would be unreasonable to put all these
257 * functions in hack. }
258 * The mail daemon '2' is at present not a real monster, but only a visual
259 * effect. Thus, makemon() is superfluous. This might become otherwise,
260 * however. The motion of '2' is less restrained than usual: diagonal moves
261 * from a DOOR are possible. He might also use SDOOR's. Also, '2' is visible
262 * in a ROOM, even when you are Blind.
263 * Its path should be longer when you are Telepat-hic and Blind.
265 * Interesting side effects:
266 * - You can get rich by sending yourself a lot of mail and selling
267 * it to the shopkeeper. Unfortunately mail isn't very valuable.
268 * - You might die in case '2' comes along at a critical moment during
269 * a fight and delivers a scroll the weight of which causes you to
272 * Possible extensions:
273 * - Open the file MAIL and do fstat instead of stat for efficiency.
274 * (But sh uses stat, so this cannot be too bad.)
275 * - Examine the mail and produce a scroll of mail called "From somebody".
276 * - Invoke MAILREADER in such a way that only this single letter is read.
278 * - Make him lose his mail when a Nymph steals the letter.
279 * - Do something to the text when the scroll is enchanted or cancelled.
281 #include "def.mkroom.h"
282 static struct stat omstat, nmstat;
283 static char *mailbox;
284 static long laststattime;
289 if (!(mailbox = getenv("MAIL")))
291 if (stat(mailbox, &omstat)) {
292 #ifdef PERMANENT_MAILBOX
293 pline("Cannot get status of MAIL=%s .", mailbox);
297 #endif /* PERMANENT_MAILBOX */
306 || moves < laststattime + MAILCKFREQ
307 #endif /* MAILCKFREQ */
310 laststattime = moves;
311 if (stat(mailbox, &nmstat)) {
312 #ifdef PERMANENT_MAILBOX
313 pline("Cannot get status of MAIL=%s anymore.", mailbox);
317 #endif /* PERMANENT_MAILBOX */
318 } else if (nmstat.st_mtime > omstat.st_mtime) {
321 getmailstatus(); /* might be too late ... */
328 /* produce a scroll of mail */
331 extern struct permonst pm_mail_daemon;
333 obj = mksobj(SCR_MAIL);
334 if (md = makemon(&pm_mail_daemon, u.ux, u.uy)) /* always succeeds */
337 pline("\"Hello, %s! I have some mail for you.\"", plname);
339 if (dist(md->mx, md->my) > 2)
343 /* let him disappear again */
349 identify(obj); /* set known and do prinv() */
352 /* make md run through the cave */
354 mdrush(struct monst *md, bool away)
356 int uroom = inroom(u.ux, u.uy);
359 int tmp = rooms[uroom].fdoor;
360 int cnt = rooms[uroom].doorct;
361 int fx = u.ux, fy = u.uy;
363 if (dist(fx, fy) < dist(doors[tmp].x, doors[tmp].y)) {
369 tmp_at(-1, md->data->mlet); /* open call */
370 if (away) { /* interchange origin and destination */
379 while (fx != md->mx || fy != md->my) {
380 int dx, dy, nfx = fx, nfy = fy, d1, d2;
383 d1 = DIST(fx, fy, md->mx, md->my);
384 for (dx = -1; dx <= 1; dx++)
385 for (dy = -1; dy <= 1; dy++)
387 d2 = DIST(fx + dx, fy + dy, md->mx, md->my);
394 if (nfx != fx || nfy != fy) {
405 tmp_at(-1, -1); /* close call */
414 #ifdef DEF_MAILREADER /* This implies that UNIX is defined */
418 if (!(mr = getenv("MAILREADER")))
424 #else /* DEF_MAILREADER */
425 page_file(mailbox, FALSE);
426 #endif /* DEF_MAILREADER */
427 /* get new stat; not entirely correct: there is a small time
428 * window where we do not see new mail */
434 regularize(char *s) /* normalize file name - we don't like ..'s or /'s */
438 while ((lp = strchr(s, '.')) || (lp = strchr(s, '/')))