initial import of 386bsd-0.1 sources

1 files changed, 430 insertions, 0 deletions

diff --git a/hack/hack.unix.c b/hack/hack.unix.c
new file mode 100644
index 00000000..03b294db
--- /dev/null
+++ b/hack/hack.unix.c
@@ -0,0 +1,430 @@
+/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
+/* hack.unix.c - version 1.0.3 */
+
+/* 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 = '_';
+}