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authorTheo de Raadt <deraadt@cvs.openbsd.org>1995-10-18 08:53:40 +0000
committerTheo de Raadt <deraadt@cvs.openbsd.org>1995-10-18 08:53:40 +0000
commitd6583bb2a13f329cf0332ef2570eb8bb8fc0e39c (patch)
treeece253b876159b39c620e62b6c9b1174642e070e /games/hack/hack.unix.c
initial import of NetBSD tree
Diffstat (limited to 'games/hack/hack.unix.c')
-rw-r--r--games/hack/hack.unix.c435
1 files changed, 435 insertions, 0 deletions
diff --git a/games/hack/hack.unix.c b/games/hack/hack.unix.c
new file mode 100644
index 00000000000..86308446eba
--- /dev/null
+++ b/games/hack/hack.unix.c
@@ -0,0 +1,435 @@
+/*
+ * Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985.
+ */
+
+#ifndef lint
+static char rcsid[] = "$NetBSD: hack.unix.c,v 1.3 1995/03/23 08:31:55 cgd Exp $";
+#endif /* not lint */
+
+/* This file collects some Unix dependencies; hack.pager.c contains some more */
+
+/*
+ * The time is used for:
+ * - seed for random()
+ * - year on tombstone and yymmdd in record file
+ * - phase of the moon (various monsters react to NEW_MOON or FULL_MOON)
+ * - night and midnight (the undead are dangerous at midnight)
+ * - determination of what files are "very old"
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include "hack.h" /* mainly for index() which depends on BSD */
+
+#include <sys/types.h> /* for time_t and stat */
+#include <sys/stat.h>
+#ifdef BSD
+#include <sys/time.h>
+#else
+#include <time.h>
+#endif BSD
+
+extern char *getenv();
+extern time_t time();
+
+setrandom()
+{
+ (void) srandom((int) time ((time_t *) 0));
+}
+
+struct tm *
+getlt()
+{
+ time_t date;
+ struct tm *localtime();
+
+ (void) time(&date);
+ return(localtime(&date));
+}
+
+getyear()
+{
+ return(1900 + getlt()->tm_year);
+}
+
+char *
+getdate()
+{
+ static char datestr[7];
+ register struct tm *lt = getlt();
+
+ (void) sprintf(datestr, "%2d%2d%2d",
+ lt->tm_year, lt->tm_mon + 1, lt->tm_mday);
+ if(datestr[2] == ' ') datestr[2] = '0';
+ if(datestr[4] == ' ') datestr[4] = '0';
+ return(datestr);
+}
+
+phase_of_the_moon() /* 0-7, with 0: new, 4: full */
+{ /* moon period: 29.5306 days */
+ /* year: 365.2422 days */
+ register struct tm *lt = getlt();
+ register int epact, diy, golden;
+
+ diy = lt->tm_yday;
+ golden = (lt->tm_year % 19) + 1;
+ epact = (11 * golden + 18) % 30;
+ if ((epact == 25 && golden > 11) || epact == 24)
+ epact++;
+
+ return( (((((diy + epact) * 6) + 11) % 177) / 22) & 7 );
+}
+
+night()
+{
+ register int hour = getlt()->tm_hour;
+
+ return(hour < 6 || hour > 21);
+}
+
+midnight()
+{
+ return(getlt()->tm_hour == 0);
+}
+
+struct stat buf, hbuf;
+
+gethdate(name) char *name; {
+/* old version - for people short of space */
+/*
+/* register char *np;
+/* if(stat(name, &hbuf))
+/* error("Cannot get status of %s.",
+/* (np = rindex(name, '/')) ? np+1 : name);
+/*
+/* version using PATH from: seismo!gregc@ucsf-cgl.ARPA (Greg Couch) */
+
+
+/*
+ * The problem with #include <sys/param.h> is that this include file
+ * does not exist on all systems, and moreover, that it sometimes includes
+ * <sys/types.h> again, so that the compiler sees these typedefs twice.
+ */
+#define MAXPATHLEN 1024
+
+register char *np, *path;
+char filename[MAXPATHLEN+1];
+ if (index(name, '/') != NULL || (path = getenv("PATH")) == NULL)
+ path = "";
+
+ for (;;) {
+ if ((np = index(path, ':')) == NULL)
+ np = path + strlen(path); /* point to end str */
+ if (np - path <= 1) /* %% */
+ (void) strcpy(filename, name);
+ else {
+ (void) strncpy(filename, path, np - path);
+ filename[np - path] = '/';
+ (void) strcpy(filename + (np - path) + 1, name);
+ }
+ if (stat(filename, &hbuf) == 0)
+ return;
+ if (*np == '\0')
+ break;
+ path = np + 1;
+ }
+ error("Cannot get status of %s.",
+ (np = rindex(name, '/')) ? np+1 : name);
+}
+
+uptodate(fd) {
+ if(fstat(fd, &buf)) {
+ pline("Cannot get status of saved level? ");
+ return(0);
+ }
+ if(buf.st_mtime < hbuf.st_mtime) {
+ pline("Saved level is out of date. ");
+ return(0);
+ }
+ return(1);
+}
+
+/* see whether we should throw away this xlock file */
+veryold(fd) {
+ register int i;
+ time_t date;
+
+ if(fstat(fd, &buf)) return(0); /* cannot get status */
+ if(buf.st_size != sizeof(int)) return(0); /* not an xlock file */
+ (void) time(&date);
+ if(date - buf.st_mtime < 3L*24L*60L*60L) { /* recent */
+ extern int errno;
+ int lockedpid; /* should be the same size as hackpid */
+
+ if(read(fd, (char *)&lockedpid, sizeof(lockedpid)) !=
+ sizeof(lockedpid))
+ /* strange ... */
+ return(0);
+
+ /* From: Rick Adams <seismo!rick>
+ /* This will work on 4.1cbsd, 4.2bsd and system 3? & 5.
+ /* It will do nothing on V7 or 4.1bsd. */
+ if(!(kill(lockedpid, 0) == -1 && errno == ESRCH))
+ return(0);
+ }
+ (void) close(fd);
+ for(i = 1; i <= MAXLEVEL; i++) { /* try to remove all */
+ glo(i);
+ (void) unlink(lock);
+ }
+ glo(0);
+ if(unlink(lock)) return(0); /* cannot remove it */
+ return(1); /* success! */
+}
+
+getlock()
+{
+ extern int errno, hackpid, locknum;
+ register int i = 0, fd;
+
+ (void) fflush(stdout);
+
+ /* we ignore QUIT and INT at this point */
+ if (link(HLOCK, LLOCK) == -1) {
+ register int errnosv = errno;
+
+ perror(HLOCK);
+ printf("Cannot link %s to %s\n", LLOCK, HLOCK);
+ switch(errnosv) {
+ case ENOENT:
+ printf("Perhaps there is no (empty) file %s ?\n", HLOCK);
+ break;
+ case EACCES:
+ printf("It seems you don't have write permission here.\n");
+ break;
+ case EEXIST:
+ printf("(Try again or rm %s.)\n", LLOCK);
+ break;
+ default:
+ printf("I don't know what is wrong.");
+ }
+ getret();
+ error("");
+ /*NOTREACHED*/
+ }
+
+ regularize(lock);
+ glo(0);
+ if(locknum > 25) locknum = 25;
+
+ do {
+ if(locknum) lock[0] = 'a' + i++;
+
+ if((fd = open(lock, 0)) == -1) {
+ if(errno == ENOENT) goto gotlock; /* no such file */
+ perror(lock);
+ (void) unlink(LLOCK);
+ error("Cannot open %s", lock);
+ }
+
+ if(veryold(fd)) /* if true, this closes fd and unlinks lock */
+ goto gotlock;
+ (void) close(fd);
+ } while(i < locknum);
+
+ (void) unlink(LLOCK);
+ error(locknum ? "Too many hacks running now."
+ : "There is a game in progress under your name.");
+gotlock:
+ fd = creat(lock, FMASK);
+ if(unlink(LLOCK) == -1)
+ error("Cannot unlink %s.", LLOCK);
+ if(fd == -1) {
+ error("cannot creat lock file.");
+ } else {
+ if(write(fd, (char *) &hackpid, sizeof(hackpid))
+ != sizeof(hackpid)){
+ error("cannot write lock");
+ }
+ if(close(fd) == -1) {
+ error("cannot close lock");
+ }
+ }
+}
+
+#ifdef MAIL
+
+/*
+ * Notify user when new mail has arrived. [Idea from Merlyn Leroy, but
+ * I don't know the details of his implementation.]
+ * { Later note: he disliked my calling a general mailreader and felt that
+ * hack should do the paging itself. But when I get mail, I want to put it
+ * in some folder, reply, etc. - it would be unreasonable to put all these
+ * functions in hack. }
+ * The mail daemon '2' is at present not a real monster, but only a visual
+ * effect. Thus, makemon() is superfluous. This might become otherwise,
+ * however. The motion of '2' is less restrained than usual: diagonal moves
+ * from a DOOR are possible. He might also use SDOOR's. Also, '2' is visible
+ * in a ROOM, even when you are Blind.
+ * Its path should be longer when you are Telepat-hic and Blind.
+ *
+ * Interesting side effects:
+ * - You can get rich by sending yourself a lot of mail and selling
+ * it to the shopkeeper. Unfortunately mail isn't very valuable.
+ * - You might die in case '2' comes along at a critical moment during
+ * a fight and delivers a scroll the weight of which causes you to
+ * collapse.
+ *
+ * Possible extensions:
+ * - Open the file MAIL and do fstat instead of stat for efficiency.
+ * (But sh uses stat, so this cannot be too bad.)
+ * - Examine the mail and produce a scroll of mail called "From somebody".
+ * - Invoke MAILREADER in such a way that only this single letter is read.
+ *
+ * - Make him lose his mail when a Nymph steals the letter.
+ * - Do something to the text when the scroll is enchanted or cancelled.
+ */
+#include "def.mkroom.h"
+static struct stat omstat,nmstat;
+static char *mailbox;
+static long laststattime;
+
+getmailstatus() {
+ if(!(mailbox = getenv("MAIL")))
+ return;
+ if(stat(mailbox, &omstat)){
+#ifdef PERMANENT_MAILBOX
+ pline("Cannot get status of MAIL=%s .", mailbox);
+ mailbox = 0;
+#else
+ omstat.st_mtime = 0;
+#endif PERMANENT_MAILBOX
+ }
+}
+
+ckmailstatus() {
+ if(!mailbox
+#ifdef MAILCKFREQ
+ || moves < laststattime + MAILCKFREQ
+#endif MAILCKFREQ
+ )
+ return;
+ laststattime = moves;
+ if(stat(mailbox, &nmstat)){
+#ifdef PERMANENT_MAILBOX
+ pline("Cannot get status of MAIL=%s anymore.", mailbox);
+ mailbox = 0;
+#else
+ nmstat.st_mtime = 0;
+#endif PERMANENT_MAILBOX
+ } else if(nmstat.st_mtime > omstat.st_mtime) {
+ if(nmstat.st_size)
+ newmail();
+ getmailstatus(); /* might be too late ... */
+ }
+}
+
+newmail() {
+ /* produce a scroll of mail */
+ register struct obj *obj;
+ register struct monst *md;
+ extern char plname[];
+ extern struct obj *mksobj(), *addinv();
+ extern struct monst *makemon();
+ extern struct permonst pm_mail_daemon;
+
+ obj = mksobj(SCR_MAIL);
+ if(md = makemon(&pm_mail_daemon, u.ux, u.uy)) /* always succeeds */
+ mdrush(md,0);
+
+ pline("\"Hello, %s! I have some mail for you.\"", plname);
+ if(md) {
+ if(dist(md->mx,md->my) > 2)
+ pline("\"Catch!\"");
+ more();
+
+ /* let him disappear again */
+ mdrush(md,1);
+ mondead(md);
+ }
+
+ obj = addinv(obj);
+ (void) identify(obj); /* set known and do prinv() */
+}
+
+/* make md run through the cave */
+mdrush(md,away)
+register struct monst *md;
+boolean away;
+{
+ register int uroom = inroom(u.ux, u.uy);
+ if(uroom >= 0) {
+ register int tmp = rooms[uroom].fdoor;
+ register int cnt = rooms[uroom].doorct;
+ register int fx = u.ux, fy = u.uy;
+ while(cnt--) {
+ if(dist(fx,fy) < dist(doors[tmp].x, doors[tmp].y)){
+ fx = doors[tmp].x;
+ fy = doors[tmp].y;
+ }
+ tmp++;
+ }
+ tmp_at(-1, md->data->mlet); /* open call */
+ if(away) { /* interchange origin and destination */
+ unpmon(md);
+ tmp = fx; fx = md->mx; md->mx = tmp;
+ tmp = fy; fy = md->my; md->my = tmp;
+ }
+ while(fx != md->mx || fy != md->my) {
+ register int dx,dy,nfx = fx,nfy = fy,d1,d2;
+
+ tmp_at(fx,fy);
+ d1 = DIST(fx,fy,md->mx,md->my);
+ for(dx = -1; dx <= 1; dx++) for(dy = -1; dy <= 1; dy++)
+ if(dx || dy) {
+ d2 = DIST(fx+dx,fy+dy,md->mx,md->my);
+ if(d2 < d1) {
+ d1 = d2;
+ nfx = fx+dx;
+ nfy = fy+dy;
+ }
+ }
+ if(nfx != fx || nfy != fy) {
+ fx = nfx;
+ fy = nfy;
+ } else {
+ if(!away) {
+ md->mx = fx;
+ md->my = fy;
+ }
+ break;
+ }
+ }
+ tmp_at(-1,-1); /* close call */
+ }
+ if(!away)
+ pmon(md);
+}
+
+readmail() {
+#ifdef DEF_MAILREADER /* This implies that UNIX is defined */
+ register char *mr = 0;
+ more();
+ if(!(mr = getenv("MAILREADER")))
+ mr = DEF_MAILREADER;
+ if(child(1)){
+ execl(mr, mr, (char *) 0);
+ exit(1);
+ }
+#else DEF_MAILREADER
+ (void) page_file(mailbox, FALSE);
+#endif DEF_MAILREADER
+ /* get new stat; not entirely correct: there is a small time
+ window where we do not see new mail */
+ getmailstatus();
+}
+#endif MAIL
+
+regularize(s) /* normalize file name - we don't like ..'s or /'s */
+register char *s;
+{
+ register char *lp;
+
+ while((lp = index(s, '.')) || (lp = index(s, '/')))
+ *lp = '_';
+}