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 1.6 2006/01/22 03:43:37 swildner 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 "hack.h" /* mainly for index() which depends on BSD */
22 #include <sys/types.h> /* for time_t and stat */
35 struct tm *localtime();
38 return(localtime(&date));
43 return(1900 + getlt()->tm_year);
49 static char datestr[7];
50 struct tm *lt = getlt();
52 (void) snprintf(datestr, sizeof(datestr), "%02d%02d%02d",
53 lt->tm_year % 100, lt->tm_mon + 1, lt->tm_mday);
57 phase_of_the_moon() /* 0-7, with 0: new, 4: full */
58 { /* moon period: 29.5306 days */
59 /* year: 365.2422 days */
60 struct tm *lt = getlt();
61 int epact, diy, golden;
64 golden = (lt->tm_year % 19) + 1;
65 epact = (11 * golden + 18) % 30;
66 if ((epact == 25 && golden > 11) || epact == 24)
69 return( (((((diy + epact) * 6) + 11) % 177) / 22) & 7 );
74 int hour = getlt()->tm_hour;
76 return(hour < 6 || hour > 21);
81 return(getlt()->tm_hour == 0);
84 struct stat buf, hbuf;
87 gethdate(const char *name)
89 /* old version - for people short of space */
92 name = "/usr/games/hide/hack";
94 error("Cannot get status of %s.",
95 (np = rindex(name, '/')) ? np+1 : name);
97 /* version using PATH from: seismo!gregc@ucsf-cgl.ARPA (Greg Couch) */
101 * The problem with #include <sys/param.h> is that this include file
102 * does not exist on all systems, and moreover, that it sometimes includes
103 * <sys/types.h> again, so that the compiler sees these typedefs twice.
105 #define MAXPATHLEN 1024
108 char filename[MAXPATHLEN+1];
109 if (index(name, '/') != NULL || (path = getenv("PATH")) == NULL)
113 if ((np = index(path, ':')) == NULL)
114 np = path + strlen(path); /* point to end str */
115 if (np - path <= 1) /* %% */
116 (void) strcpy(filename, name);
118 (void) strncpy(filename, path, np - path);
119 filename[np - path] = '/';
120 (void) strcpy(filename + (np - path) + 1, name);
122 if (stat(filename, &hbuf) == 0)
128 error("Cannot get status of %s.",
129 (np = rindex(name, '/')) ? np+1 : name);
134 if(fstat(fd, &buf)) {
135 pline("Cannot get status of saved level? ");
138 if(buf.st_mtime < hbuf.st_mtime) {
139 pline("Saved level is out of date. ");
145 /* see whether we should throw away this xlock file */
150 if(fstat(fd, &buf)) return(0); /* cannot get status */
151 if(buf.st_size != sizeof(int)) return(0); /* 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)) return(0); /* cannot remove it */
174 return(1); /* success! */
179 extern int hackpid, locknum;
182 (void) fflush(stdout);
184 /* we ignore QUIT and INT at this point */
185 if (link(HLOCK, LLOCK) == -1) {
189 printf("Cannot link %s to %s\n", LLOCK, HLOCK);
192 printf("Perhaps there is no (empty) file %s ?\n", HLOCK);
195 printf("It seems you don't have write permission here.\n");
198 printf("(Try again or rm %s.)\n", LLOCK);
201 printf("I don't know what is wrong.");
210 if(locknum > 25) locknum = 25;
213 if(locknum) lock[0] = 'a' + i++;
215 if((fd = open(lock, 0)) == -1) {
216 if(errno == ENOENT) goto gotlock; /* no such file */
218 (void) unlink(LLOCK);
219 error("Cannot open %s", lock);
222 if(veryold(fd)) /* if true, this closes fd and unlinks lock */
225 } while(i < locknum);
227 (void) unlink(LLOCK);
228 error(locknum ? "Too many hacks running now."
229 : "There is a game in progress under your name.");
231 fd = creat(lock, FMASK);
232 if(unlink(LLOCK) == -1)
233 error("Cannot unlink %s.", LLOCK);
235 error("cannot creat lock file.");
237 if(write(fd, (char *) &hackpid, sizeof(hackpid))
239 error("cannot write lock");
241 if(close(fd) == -1) {
242 error("cannot close lock");
250 * Notify user when new mail has arrived. [Idea from Merlyn Leroy, but
251 * I don't know the details of his implementation.]
252 * { Later note: he disliked my calling a general mailreader and felt that
253 * hack should do the paging itself. But when I get mail, I want to put it
254 * in some folder, reply, etc. - it would be unreasonable to put all these
255 * functions in hack. }
256 * The mail daemon '2' is at present not a real monster, but only a visual
257 * effect. Thus, makemon() is superfluous. This might become otherwise,
258 * however. The motion of '2' is less restrained than usual: diagonal moves
259 * from a DOOR are possible. He might also use SDOOR's. Also, '2' is visible
260 * in a ROOM, even when you are Blind.
261 * Its path should be longer when you are Telepat-hic and Blind.
263 * Interesting side effects:
264 * - You can get rich by sending yourself a lot of mail and selling
265 * it to the shopkeeper. Unfortunately mail isn't very valuable.
266 * - You might die in case '2' comes along at a critical moment during
267 * a fight and delivers a scroll the weight of which causes you to
270 * Possible extensions:
271 * - Open the file MAIL and do fstat instead of stat for efficiency.
272 * (But sh uses stat, so this cannot be too bad.)
273 * - Examine the mail and produce a scroll of mail called "From somebody".
274 * - Invoke MAILREADER in such a way that only this single letter is read.
276 * - Make him lose his mail when a Nymph steals the letter.
277 * - Do something to the text when the scroll is enchanted or cancelled.
279 #include "def.mkroom.h"
280 static struct stat omstat,nmstat;
281 static char *mailbox;
282 static long laststattime;
285 if(!(mailbox = getenv("MAIL")))
287 if(stat(mailbox, &omstat)){
288 #ifdef PERMANENT_MAILBOX
289 pline("Cannot get status of MAIL=%s .", mailbox);
293 #endif /* PERMANENT_MAILBOX */
300 || moves < laststattime + MAILCKFREQ
301 #endif /* MAILCKFREQ */
304 laststattime = moves;
305 if(stat(mailbox, &nmstat)){
306 #ifdef PERMANENT_MAILBOX
307 pline("Cannot get status of MAIL=%s anymore.", mailbox);
311 #endif /* PERMANENT_MAILBOX */
312 } else if(nmstat.st_mtime > omstat.st_mtime) {
315 getmailstatus(); /* might be too late ... */
320 /* produce a scroll of mail */
323 extern char plname[];
324 extern struct obj *mksobj(), *addinv();
325 extern struct monst *makemon();
326 extern struct permonst pm_mail_daemon;
328 obj = mksobj(SCR_MAIL);
329 if(md = makemon(&pm_mail_daemon, u.ux, u.uy)) /* always succeeds */
332 pline("\"Hello, %s! I have some mail for you.\"", plname);
334 if(dist(md->mx,md->my) > 2)
338 /* let him disappear again */
344 (void) identify(obj); /* set known and do prinv() */
347 /* make md run through the cave */
352 int uroom = inroom(u.ux, u.uy);
354 int tmp = rooms[uroom].fdoor;
355 int cnt = rooms[uroom].doorct;
356 int fx = u.ux, fy = u.uy;
358 if(dist(fx,fy) < dist(doors[tmp].x, doors[tmp].y)){
364 tmp_at(-1, md->data->mlet); /* open call */
365 if(away) { /* interchange origin and destination */
367 tmp = fx; fx = md->mx; md->mx = tmp;
368 tmp = fy; fy = md->my; md->my = tmp;
370 while(fx != md->mx || fy != md->my) {
371 int dx,dy,nfx = fx,nfy = fy,d1,d2;
374 d1 = DIST(fx,fy,md->mx,md->my);
375 for(dx = -1; dx <= 1; dx++) for(dy = -1; dy <= 1; dy++)
377 d2 = DIST(fx+dx,fy+dy,md->mx,md->my);
384 if(nfx != fx || nfy != fy) {
395 tmp_at(-1,-1); /* close call */
402 #ifdef DEF_MAILREADER /* This implies that UNIX is defined */
405 if(!(mr = getenv("MAILREADER")))
408 execl(mr, mr, (char *) 0);
411 #else /* DEF_MAILREADER */
412 (void) page_file(mailbox, FALSE);
413 #endif /* DEF_MAILREADER */
414 /* get new stat; not entirely correct: there is a small time
415 window where we do not see new mail */
420 regularize(s) /* normalize file name - we don't like ..'s or /'s */
425 while((lp = index(s, '.')) || (lp = index(s, '/')))