1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
2 /* hack.unix.c - version 1.0.3 */
4 /* This file collects some Unix dependencies; hack.pager.c contains some more */
7 * The time is used for:
9 * - year on tombstone and yymmdd in record file
10 * - phase of the moon (various monsters react to NEW_MOON or FULL_MOON)
11 * - night and midnight (the undead are dangerous at midnight)
12 * - determination of what files are "very old"
18 #include "hack.h" /* mainly for index() which depends on BSD */
20 #include <sys/types.h> /* for time_t and stat */
33 struct tm *localtime();
36 return(localtime(&date));
41 return(1900 + getlt()->tm_year);
47 static char datestr[7];
48 register struct tm *lt = getlt();
50 (void) snprintf(datestr, sizeof(datestr), "%02d%02d%02d",
51 lt->tm_year % 100, lt->tm_mon + 1, lt->tm_mday);
55 phase_of_the_moon() /* 0-7, with 0: new, 4: full */
56 { /* moon period: 29.5306 days */
57 /* year: 365.2422 days */
58 register struct tm *lt = getlt();
59 register int epact, diy, golden;
62 golden = (lt->tm_year % 19) + 1;
63 epact = (11 * golden + 18) % 30;
64 if ((epact == 25 && golden > 11) || epact == 24)
67 return( (((((diy + epact) * 6) + 11) % 177) / 22) & 7 );
72 register int hour = getlt()->tm_hour;
74 return(hour < 6 || hour > 21);
79 return(getlt()->tm_hour == 0);
82 struct stat buf, hbuf;
84 gethdate(name) char *name; {
85 /* old version - for people short of space */
88 name = "/usr/games/hide/hack";
90 error("Cannot get status of %s.",
91 (np = rindex(name, '/')) ? np+1 : name);
93 /* version using PATH from: seismo!gregc@ucsf-cgl.ARPA (Greg Couch) */
97 * The problem with #include <sys/param.h> is that this include file
98 * does not exist on all systems, and moreover, that it sometimes includes
99 * <sys/types.h> again, so that the compiler sees these typedefs twice.
101 #define MAXPATHLEN 1024
103 register char *np, *path;
104 char filename[MAXPATHLEN+1];
105 if (index(name, '/') != NULL || (path = getenv("PATH")) == NULL)
109 if ((np = index(path, ':')) == NULL)
110 np = path + strlen(path); /* point to end str */
111 if (np - path <= 1) /* %% */
112 (void) strcpy(filename, name);
114 (void) strncpy(filename, path, np - path);
115 filename[np - path] = '/';
116 (void) strcpy(filename + (np - path) + 1, name);
118 if (stat(filename, &hbuf) == 0)
124 error("Cannot get status of %s.",
125 (np = rindex(name, '/')) ? np+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 */
146 if(fstat(fd, &buf)) return(0); /* cannot get status */
147 if(buf.st_size != sizeof(int)) return(0); /* not an xlock file */
149 if(date - buf.st_mtime < 3L*24L*60L*60L) { /* recent */
151 int lockedpid; /* should be the same size as hackpid */
153 if(read(fd, (char *)&lockedpid, sizeof(lockedpid)) !=
158 /* From: Rick Adams <seismo!rick> */
159 /* This will work on 4.1cbsd, 4.2bsd and system 3? & 5. */
160 /* It will do nothing on V7 or 4.1bsd. */
161 if(!(kill(lockedpid, 0) == -1 && errno == ESRCH))
165 for(i = 1; i <= MAXLEVEL; i++) { /* try to remove all */
170 if(unlink(lock)) return(0); /* cannot remove it */
171 return(1); /* success! */
176 extern int errno, hackpid, locknum;
177 register int i = 0, fd;
179 (void) fflush(stdout);
181 /* we ignore QUIT and INT at this point */
182 if (link(HLOCK, LLOCK) == -1) {
183 register int errnosv = errno;
186 printf("Cannot link %s to %s\n", LLOCK, HLOCK);
189 printf("Perhaps there is no (empty) file %s ?\n", HLOCK);
192 printf("It seems you don't have write permission here.\n");
195 printf("(Try again or rm %s.)\n", LLOCK);
198 printf("I don't know what is wrong.");
207 if(locknum > 25) locknum = 25;
210 if(locknum) lock[0] = 'a' + i++;
212 if((fd = open(lock, 0)) == -1) {
213 if(errno == ENOENT) goto gotlock; /* no such file */
215 (void) unlink(LLOCK);
216 error("Cannot open %s", lock);
219 if(veryold(fd)) /* if true, this closes fd and unlinks lock */
222 } while(i < locknum);
224 (void) unlink(LLOCK);
225 error(locknum ? "Too many hacks running now."
226 : "There is a game in progress under your name.");
228 fd = creat(lock, FMASK);
229 if(unlink(LLOCK) == -1)
230 error("Cannot unlink %s.", LLOCK);
232 error("cannot creat lock file.");
234 if(write(fd, (char *) &hackpid, sizeof(hackpid))
236 error("cannot write lock");
238 if(close(fd) == -1) {
239 error("cannot close lock");
247 * Notify user when new mail has arrived. [Idea from Merlyn Leroy, but
248 * I don't know the details of his implementation.]
249 * { Later note: he disliked my calling a general mailreader and felt that
250 * hack should do the paging itself. But when I get mail, I want to put it
251 * in some folder, reply, etc. - it would be unreasonable to put all these
252 * functions in hack. }
253 * The mail daemon '2' is at present not a real monster, but only a visual
254 * effect. Thus, makemon() is superfluous. This might become otherwise,
255 * however. The motion of '2' is less restrained than usual: diagonal moves
256 * from a DOOR are possible. He might also use SDOOR's. Also, '2' is visible
257 * in a ROOM, even when you are Blind.
258 * Its path should be longer when you are Telepat-hic and Blind.
260 * Interesting side effects:
261 * - You can get rich by sending yourself a lot of mail and selling
262 * it to the shopkeeper. Unfortunately mail isn't very valuable.
263 * - You might die in case '2' comes along at a critical moment during
264 * a fight and delivers a scroll the weight of which causes you to
267 * Possible extensions:
268 * - Open the file MAIL and do fstat instead of stat for efficiency.
269 * (But sh uses stat, so this cannot be too bad.)
270 * - Examine the mail and produce a scroll of mail called "From somebody".
271 * - Invoke MAILREADER in such a way that only this single letter is read.
273 * - Make him lose his mail when a Nymph steals the letter.
274 * - Do something to the text when the scroll is enchanted or cancelled.
276 #include "def.mkroom.h"
277 static struct stat omstat,nmstat;
278 static char *mailbox;
279 static long laststattime;
282 if(!(mailbox = getenv("MAIL")))
284 if(stat(mailbox, &omstat)){
285 #ifdef PERMANENT_MAILBOX
286 pline("Cannot get status of MAIL=%s .", mailbox);
290 #endif PERMANENT_MAILBOX
297 || moves < laststattime + MAILCKFREQ
301 laststattime = moves;
302 if(stat(mailbox, &nmstat)){
303 #ifdef PERMANENT_MAILBOX
304 pline("Cannot get status of MAIL=%s anymore.", mailbox);
308 #endif PERMANENT_MAILBOX
309 } else if(nmstat.st_mtime > omstat.st_mtime) {
312 getmailstatus(); /* might be too late ... */
317 /* produce a scroll of mail */
318 register struct obj *obj;
319 register struct monst *md;
320 extern char plname[];
321 extern struct obj *mksobj(), *addinv();
322 extern struct monst *makemon();
323 extern struct permonst pm_mail_daemon;
325 obj = mksobj(SCR_MAIL);
326 if(md = makemon(&pm_mail_daemon, u.ux, u.uy)) /* always succeeds */
329 pline("\"Hello, %s! I have some mail for you.\"", plname);
331 if(dist(md->mx,md->my) > 2)
335 /* let him disappear again */
341 (void) identify(obj); /* set known and do prinv() */
344 /* make md run through the cave */
346 register struct monst *md;
349 register int uroom = inroom(u.ux, u.uy);
351 register int tmp = rooms[uroom].fdoor;
352 register int cnt = rooms[uroom].doorct;
353 register int fx = u.ux, fy = u.uy;
355 if(dist(fx,fy) < dist(doors[tmp].x, doors[tmp].y)){
361 tmp_at(-1, md->data->mlet); /* open call */
362 if(away) { /* interchange origin and destination */
364 tmp = fx; fx = md->mx; md->mx = tmp;
365 tmp = fy; fy = md->my; md->my = tmp;
367 while(fx != md->mx || fy != md->my) {
368 register int dx,dy,nfx = fx,nfy = fy,d1,d2;
371 d1 = DIST(fx,fy,md->mx,md->my);
372 for(dx = -1; dx <= 1; dx++) for(dy = -1; dy <= 1; dy++)
374 d2 = DIST(fx+dx,fy+dy,md->mx,md->my);
381 if(nfx != fx || nfy != fy) {
392 tmp_at(-1,-1); /* close call */
399 #ifdef DEF_MAILREADER /* This implies that UNIX is defined */
400 register char *mr = 0;
402 if(!(mr = getenv("MAILREADER")))
405 execl(mr, mr, (char *) 0);
409 (void) page_file(mailbox, FALSE);
410 #endif DEF_MAILREADER
411 /* get new stat; not entirely correct: there is a small time
412 window where we do not see new mail */
417 regularize(s) /* normalize file name - we don't like ..'s or /'s */
422 while((lp = index(s, '.')) || (lp = index(s, '/')))