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/* SCCS Id: @(#)mail.c 3.4 2002/01/13 */
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/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
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/* NetHack may be freely redistributed. See license for details. */
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* Notify user when new mail has arrived. Idea by Merlyn Leroy.
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* The mail daemon can move with less than usual restraint. It can:
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* - move diagonally from a door
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* - use secret and closed doors
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* - run through a monster ("Gangway!", etc.)
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* - run over pools & traps
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* Possible extensions:
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* - Open the file MAIL and do fstat instead of stat for efficiency.
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* (But sh uses stat, so this cannot be too bad.)
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* - Examine the mail and produce a scroll of mail named "From somebody".
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* - Invoke MAILREADER in such a way that only this single letter is read.
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* - Do something to the text when the scroll is enchanted or cancelled.
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* - Make the daemon always appear at a stairwell, and have it find a
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* Note by Olaf Seibert: On the Amiga, we usually don't get mail. So we go
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* through most of the effects at 'random' moments.
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* Note by Paul Winner: The MSDOS port also 'fakes' the mail daemon at
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STATIC_DCL boolean FDECL(md_start,(coord *));
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STATIC_DCL boolean FDECL(md_stop,(coord *, coord *));
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STATIC_DCL boolean FDECL(md_rush,(struct monst *,int,int));
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STATIC_DCL void FDECL(newmail, (struct mail_info *));
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extern char *viz_rmin, *viz_rmax; /* line-of-sight limits (vision.c) */
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# if !defined(UNIX) && !defined(VMS) && !defined(LAN_MAIL)
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/* DON'T trust all Unices to declare getpwuid() in <pwd.h> */
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# if !defined(_BULL_SOURCE) && !defined(__sgi) && !defined(_M_UNIX)
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# if !defined(SUNOS4) && !(defined(ULTRIX) && defined(__GNUC__))
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/* DO trust all SVR4 to typedef uid_t in <sys/types.h> (probably to a long) */
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# if defined(POSIX_TYPES) || defined(SVR4) || defined(HPUX)
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extern struct passwd *FDECL(getpwuid,(uid_t));
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extern struct passwd *FDECL(getpwuid,(int));
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static struct stat omstat,nmstat;
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static char *mailbox = (char *)0;
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static long laststattime;
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# if !defined(MAILPATH) && defined(AMS) /* Just a placeholder for AMS */
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# define MAILPATH "/dev/null"
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# if !defined(MAILPATH) && (defined(LINUX) || defined(__osf__))
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# define MAILPATH "/var/spool/mail/"
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# if !defined(MAILPATH) && defined(__FreeBSD__)
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# define MAILPATH "/var/mail/"
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# if !defined(MAILPATH) && (defined(BSD) || defined(ULTRIX))
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# define MAILPATH "/usr/spool/mail/"
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# if !defined(MAILPATH) && (defined(SYSV) || defined(HPUX))
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# define MAILPATH "/usr/mail/"
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if(!mailbox && !(mailbox = nh_getenv("MAIL"))) {
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struct passwd ppasswd;
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(void) memcpy(&ppasswd, getpwuid(getuid()), sizeof(struct passwd));
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mailbox = (char *) alloc((unsigned) strlen(ppasswd.pw_dir)+sizeof(AMS_MAILBOX));
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Strcpy(mailbox, ppasswd.pw_dir);
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Strcat(mailbox, AMS_MAILBOX);
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const char *pw_name = getpwuid(getuid())->pw_name;
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mailbox = (char *) alloc(sizeof(MAILPATH)+strlen(pw_name));
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Strcpy(mailbox, MAILPATH);
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Strcat(mailbox, pw_name);
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if(stat(mailbox, &omstat)){
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# ifdef PERMANENT_MAILBOX
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pline("Cannot get status of MAIL=\"%s\".", mailbox);
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* Pick coordinates for a starting position for the mail daemon. Called
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* from newmail() and newphone().
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coord testcc; /* scratch coordinates */
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int row; /* current row we are checking */
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int lax; /* if TRUE, pick a position in sight. */
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int dd; /* distance to current point */
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int max_distance; /* max distance found so far */
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* If blind and not telepathic, then it doesn't matter what we pick ---
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* the hero is not going to see it anyway. So pick a nearby position.
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if (Blind && !Blind_telepat) {
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if (!enexto(startp, u.ux, u.uy, (struct permonst *) 0))
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return FALSE; /* no good posiitons */
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* Arrive at an up or down stairwell if it is in line of sight from the
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if (couldsee(upstair.sx, upstair.sy)) {
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startp->x = upstair.sx;
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startp->y = upstair.sy;
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if (couldsee(dnstair.sx, dnstair.sy)) {
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startp->x = dnstair.sx;
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startp->y = dnstair.sy;
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* Try to pick a location out of sight next to the farthest position away
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* from the hero. If this fails, try again, just picking the farthest
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* position that could be seen. What we really ought to be doing is
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* finding a path from a stairwell...
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* The arrays viz_rmin[] and viz_rmax[] are set even when blind. These
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* are the LOS limits for each row.
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lax = 0; /* be picky */
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for (row = 0; row < ROWNO; row++) {
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if (viz_rmin[row] < viz_rmax[row]) {
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/* There are valid positions on this row. */
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dd = distu(viz_rmin[row],row);
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if (dd > max_distance) {
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startp->x = viz_rmin[row];
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} else if (enexto(&testcc, (xchar)viz_rmin[row], row,
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(struct permonst *) 0) &&
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!cansee(testcc.x, testcc.y) &&
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couldsee(testcc.x, testcc.y)) {
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dd = distu(viz_rmax[row],row);
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if (dd > max_distance) {
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startp->x = viz_rmax[row];
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} else if (enexto(&testcc, (xchar)viz_rmax[row], row,
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(struct permonst *) 0) &&
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!cansee(testcc.x,testcc.y) &&
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couldsee(testcc.x, testcc.y)) {
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if (max_distance < 0) {
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lax = 1; /* just find a position */
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* Try to choose a stopping point as near as possible to the starting
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* position while still adjacent to the hero. If all else fails, try
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* enexto(). Use enexto() as a last resort because enexto() chooses
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* its point randomly, which is not what we want.
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md_stop(stopp, startp)
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coord *stopp; /* stopping position (we fill it in) */
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coord *startp; /* starting positon (read only) */
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int x, y, distance, min_distance = -1;
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for (x = u.ux-1; x <= u.ux+1; x++)
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for (y = u.uy-1; y <= u.uy+1; y++) {
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if (!isok(x, y) || (x == u.ux && y == u.uy)) continue;
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if (ACCESSIBLE(levl[x][y].typ) && !MON_AT(x,y)) {
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distance = dist2(x,y,startp->x,startp->y);
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if (min_distance < 0 || distance < min_distance ||
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(distance == min_distance && rn2(2))) {
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min_distance = distance;
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/* If we didn't find a good spot, try enexto(). */
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if (min_distance < 0 &&
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!enexto(stopp, u.ux, u.uy, &mons[PM_MAIL_DAEMON]))
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/* Let the mail daemon have a larger vocabulary. */
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static NEARDATA const char *mail_text[] = {
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#define md_exclamations() (mail_text[rn2(3)])
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* Make the mail daemon run through the dungeon. The daemon will run over
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* any monsters that are in its path, but will replace them later. Return
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* FALSE if the md gets stuck in a position where there is a monster. Return
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register int tx, ty; /* destination of mail daemon */
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struct monst *mon; /* displaced monster */
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register int dx, dy; /* direction counters */
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int fx = md->mx, fy = md->my; /* current location */
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int nfx = fx, nfy = fy, /* new location */
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d1, d2; /* shortest distances */
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* It is possible that the monster at (fx,fy) is not the md when:
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* the md rushed the hero and failed, and is now starting back.
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if (m_at(fx, fy) == md) {
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remove_monster(fx, fy); /* pick up from orig position */
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* At the beginning and exit of this loop, md is not placed in the
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/* Find a good location next to (fx,fy) closest to (tx,ty). */
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d1 = dist2(fx,fy,tx,ty);
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for (dx = -1; dx <= 1; dx++) for(dy = -1; dy <= 1; dy++)
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if ((dx || dy) && isok(fx+dx,fy+dy) &&
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!IS_STWALL(levl[fx+dx][fy+dy].typ)) {
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d2 = dist2(fx+dx,fy+dy,tx,ty);
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/* Break if the md couldn't find a new position. */
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if (nfx == fx && nfy == fy) break;
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fx = nfx; /* this is our new position */
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/* Break if the md reaches its destination. */
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if (fx == tx && fy == ty) break;
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if ((mon = m_at(fx,fy)) != 0) /* save monster at this position */
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verbalize(md_exclamations());
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else if (fx == u.ux && fy == u.uy)
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verbalize("Excuse me.");
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place_monster(md,fx,fy); /* put md down */
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newsym(fx,fy); /* see it */
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flush_screen(0); /* make sure md shows up */
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delay_output(); /* wait a little bit */
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/* Remove md from the dungeon. Restore original mon, if necessary. */
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if ((mon->mx != fx) || (mon->my != fy))
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place_worm_seg(mon, fx, fy);
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place_monster(mon, fx, fy);
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remove_monster(fx, fy);
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* Check for a monster at our stopping position (this is possible, but
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* very unlikely). If one exists, then have the md leave in disgust.
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if ((mon = m_at(fx, fy)) != 0) {
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place_monster(md, fx, fy); /* display md with text below */
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verbalize("This place's too crowded. I'm outta here.");
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if ((mon->mx != fx) || (mon->my != fy)) /* put mon back */
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place_worm_seg(mon, fx, fy);
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place_monster(mon, fx, fy);
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place_monster(md, fx, fy); /* place at final spot */
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delay_output(); /* wait a little bit */
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/* Deliver a scroll of mail. */
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struct mail_info *info;
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boolean message_seen = FALSE;
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/* Try to find good starting and stopping places. */
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if (!md_start(&start) || !md_stop(&stop,&start)) goto give_up;
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/* Make the daemon. Have it rush towards the hero. */
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if (!(md = makemon(&mons[PM_MAIL_DAEMON], start.x, start.y, NO_MM_FLAGS)))
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if (!md_rush(md, stop.x, stop.y)) goto go_back;
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verbalize("%s, %s! %s.", Hello(md), plname, info->display_txt);
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if (info->message_typ) {
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struct obj *obj = mksobj(SCR_MAIL, FALSE, FALSE);
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if (distu(md->mx,md->my) > 2)
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display_nhwindow(WIN_MESSAGE, FALSE);
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if (info->object_nam) {
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obj = oname(obj, info->object_nam);
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if (info->response_cmd) { /*(hide extension of the obj name)*/
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int namelth = info->response_cmd - info->object_nam - 1;
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if ( namelth <= 0 || namelth >= (int) obj->onamelth )
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impossible("mail delivery screwed up");
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*(ONAME(obj) + namelth) = '\0';
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/* Note: renaming object will discard the hidden command. */
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obj = hold_another_object(obj, "Oops!",
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(const char *)0, (const char *)0);
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/* zip back to starting location */
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(void) md_rush(md, start.x, start.y);
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/* deliver some classes of messages even if no daemon ever shows up */
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if (!message_seen && info->message_typ == MSG_OTHER)
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pline("Hark! \"%s.\"", info->display_txt);
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# if !defined(UNIX) && !defined(VMS) && !defined(LAN_MAIL)
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if (u.uswallow || !flags.biff) return;
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if (mustgetmail < 0) {
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#if defined(AMIGA) || defined(MSDOS) || defined(TOS)
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mustgetmail=(moves<2000)?(100+rn2(2000)):(2000+rn2(3000));
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if (--mustgetmail <= 0) {
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static struct mail_info
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deliver = {MSG_MAIL,"I have some mail for you",0,0};
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static char *junk[] = {
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"Please disregard previous letter.",
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"Welcome to NetHack.",
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"Only Amiga makes it possible.",
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"CATS have all the answers.",
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"Report bugs to <devteam@nethack.org>.",
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"Invitation: Visit the NetHack web site at http://www.nethack.org!"
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pline("Unfortunately you cannot see what it says.");
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pline("It reads: \"%s\"", junk[rn2(SIZE(junk))]);
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# endif /* !UNIX && !VMS && !LAN_MAIL */
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if(!mailbox || u.uswallow || !flags.biff
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|| moves < laststattime + MAILCKFREQ
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laststattime = moves;
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if(stat(mailbox, &nmstat)){
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# ifdef PERMANENT_MAILBOX
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pline("Cannot get status of MAIL=\"%s\" anymore.", mailbox);
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} else if(nmstat.st_mtime > omstat.st_mtime) {
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if (nmstat.st_size) {
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static struct mail_info deliver = {
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# ifndef NO_MAILREADER
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MSG_MAIL, "I have some mail for you",
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/* suppress creation and delivery of scroll of mail */
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MSG_OTHER, "You have some mail in the outside world",
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getmailstatus(); /* might be too late ... */
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# ifdef DEF_MAILREADER /* This implies that UNIX is defined */
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register const char *mr = 0;
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display_nhwindow(WIN_MESSAGE, FALSE);
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if(!(mr = nh_getenv("MAILREADER")))
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(void) execl(mr, mr, (char *)0);
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terminate(EXIT_FAILURE);
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# ifndef AMS /* AMS mailboxes are directories */
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display_file(mailbox, TRUE);
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# endif /* DEF_MAILREADER */
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/* get new stat; not entirely correct: there is a small time
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window where we do not see new mail */
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extern NDECL(struct mail_info *parse_next_broadcast);
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volatile int broadcasts = 0;
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struct mail_info *brdcst;
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if (u.uswallow || !flags.biff) return;
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while (broadcasts > 0) { /* process all trapped broadcasts [until] */
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if ((brdcst = parse_next_broadcast()) != 0) {
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break; /* only handle one real message at a time */
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# ifdef SHELL /* can't access mail reader without spawning subprocess */
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const char *txt, *cmd;
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char *p, buf[BUFSZ], qbuf[BUFSZ];
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/* there should be a command hidden beyond the object name */
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txt = otmp->onamelth ? ONAME(otmp) : "";
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cmd = (len + 1 < otmp->onamelth) ? txt + len + 1 : (char *) 0;
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if (!cmd || !*cmd) cmd = "SPAWN";
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Sprintf(qbuf, "System command (%s)", cmd);
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if (*buf != '\033') {
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for (p = eos(buf); p > buf; *p = '\0')
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if (*--p != ' ') break; /* strip trailing spaces */
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if (*buf) cmd = buf; /* use user entered command */
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if (!strcmpi(cmd, "SPAWN") || !strcmp(cmd, "!"))
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cmd = (char *) 0; /* interactive escape */
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vms_doshell(cmd, TRUE);
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static int laststattime = 0;
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if(u.uswallow || !flags.biff
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|| moves < laststattime + MAILCKFREQ
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laststattime = moves;
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if (lan_mail_check()) {
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static struct mail_info deliver = {
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# ifndef NO_MAILREADER
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MSG_MAIL, "I have some mail for you",
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/* suppress creation and delivery of scroll of mail */
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MSG_OTHER, "You have some mail in the outside world",
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# endif /* LAN_MAIL */