Source:SLASH'EM 0.0.7E7F2/mail.c

From NetHackWiki
Jump to navigation Jump to search

Below is the full text to mail.c from the source code of SLASH'EM 0.0.7E7F2. To link to a particular line, write [[SLASH'EM 0.0.7E7F2/mail.c#line123]], for example.

The latest source code for vanilla NetHack is at Source code.


The NetHack General Public License applies to screenshots, source code and other content from NetHack.

This content was modified from the original NetHack source code distribution (by splitting up NetHack content between wiki pages, and possibly further editing). See the page history for a list of who changed it, and on what dates.

1.    /*	SCCS Id: @(#)mail.c	3.4	2002/01/13	*/
2.    /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
3.    /* NetHack may be freely redistributed.  See license for details. */
4.    
5.    #include "hack.h"
6.    
7.    #ifdef MAIL
8.    #include "mail.h"
9.    
10.   /*
11.    * Notify user when new mail has arrived.  Idea by Merlyn Leroy.
12.    *
13.    * The mail daemon can move with less than usual restraint.  It can:
14.    *	- move diagonally from a door
15.    *	- use secret and closed doors
16.    *	- run through a monster ("Gangway!", etc.)
17.    *	- run over pools & traps
18.    *
19.    * Possible extensions:
20.    *	- Open the file MAIL and do fstat instead of stat for efficiency.
21.    *	  (But sh uses stat, so this cannot be too bad.)
22.    *	- Examine the mail and produce a scroll of mail named "From somebody".
23.    *	- Invoke MAILREADER in such a way that only this single letter is read.
24.    *	- Do something to the text when the scroll is enchanted or cancelled.
25.    *	- Make the daemon always appear at a stairwell, and have it find a
26.    *	  path to the hero.
27.    *
28.    * Note by Olaf Seibert: On the Amiga, we usually don't get mail.  So we go
29.    *			 through most of the effects at 'random' moments.
30.    * Note by Paul Winner:  The MSDOS port also 'fakes' the mail daemon at
31.    *			 random intervals.
32.    */
33.   
34.   STATIC_DCL boolean FDECL(md_start,(coord *));
35.   STATIC_DCL boolean FDECL(md_stop,(coord *, coord *));
36.   STATIC_DCL boolean FDECL(md_rush,(struct monst *,int,int));
37.   STATIC_DCL void FDECL(newmail, (struct mail_info *));
38.   
39.   extern char *viz_rmin, *viz_rmax;	/* line-of-sight limits (vision.c) */
40.   
41.   #ifdef OVL0
42.   
43.   # if !defined(UNIX) && !defined(VMS) && !defined(LAN_MAIL)
44.   int mustgetmail = -1;
45.   # endif
46.   
47.   #endif /* OVL0 */
48.   #ifdef OVLB
49.   
50.   # ifdef UNIX
51.   #include <sys/stat.h>
52.   #include <pwd.h>
53.   /* DON'T trust all Unices to declare getpwuid() in <pwd.h> */
54.   #  if !defined(_BULL_SOURCE) && !defined(__sgi) && !defined(_M_UNIX)
55.   #   if !defined(SUNOS4) && !(defined(ULTRIX) && defined(__GNUC__))
56.   #    if !defined(LINUX)
57.   /* DO trust all SVR4 to typedef uid_t in <sys/types.h> (probably to a long) */
58.   #    if defined(POSIX_TYPES) || defined(SVR4) || defined(HPUX)
59.   extern struct passwd *FDECL(getpwuid,(uid_t));
60.   #    else
61.   extern struct passwd *FDECL(getpwuid,(int));
62.   #    endif
63.   #   endif
64.   #  endif
65.   #  endif
66.   static struct stat omstat,nmstat;
67.   static char *mailbox = (char *)0;
68.   static long laststattime;
69.   
70.   # if !defined(MAILPATH) && defined(AMS)	/* Just a placeholder for AMS */
71.   #  define MAILPATH "/dev/null"
72.   # endif
73.   # if !defined(MAILPATH) && (defined(LINUX) || defined(__osf__))
74.   #  define MAILPATH "/var/spool/mail/"
75.   # endif
76.   # if !defined(MAILPATH) && defined(__FreeBSD__)
77.   #  define MAILPATH "/var/mail/"
78.   # endif
79.   # if !defined(MAILPATH) && (defined(BSD) || defined(ULTRIX))
80.   #  define MAILPATH "/usr/spool/mail/"
81.   # endif
82.   # if !defined(MAILPATH) && (defined(SYSV) || defined(HPUX))
83.   #  define MAILPATH "/usr/mail/"
84.   # endif
85.   
86.   void
87.   getmailstatus()
88.   {
89.   	if(!mailbox && !(mailbox = nh_getenv("MAIL"))) {
90.   #  ifdef MAILPATH
91.   #   ifdef AMS
92.   	        struct passwd ppasswd;
93.   
94.   		(void) memcpy(&ppasswd, getpwuid(getuid()), sizeof(struct passwd));
95.   		if (ppasswd.pw_dir) {
96.   		     mailbox = (char *) alloc((unsigned) strlen(ppasswd.pw_dir)+sizeof(AMS_MAILBOX));
97.   		     Strcpy(mailbox, ppasswd.pw_dir);
98.   		     Strcat(mailbox, AMS_MAILBOX);
99.   		} else
100.  		  return;
101.  #   else
102.  		const char *pw_name = getpwuid(getuid())->pw_name;
103.  		mailbox = (char *) alloc(sizeof(MAILPATH)+strlen(pw_name));
104.  		Strcpy(mailbox, MAILPATH);
105.  		Strcat(mailbox, pw_name);
106.  #  endif /* AMS */
107.  #  else
108.  		return;
109.  #  endif
110.  	}
111.  	if(stat(mailbox, &omstat)){
112.  #  ifdef PERMANENT_MAILBOX
113.  		pline("Cannot get status of MAIL=\"%s\".", mailbox);
114.  		mailbox = 0;
115.  #  else
116.  		omstat.st_mtime = 0;
117.  #  endif
118.  	}
119.  }
120.  # endif /* UNIX */
121.  
122.  #endif /* OVLB */
123.  #ifdef OVL0
124.  
125.  /*
126.   * Pick coordinates for a starting position for the mail daemon.  Called
127.   * from newmail() and newphone().
128.   */
129.  STATIC_OVL boolean
130.  md_start(startp)
131.      coord *startp;
132.  {
133.      coord testcc;	/* scratch coordinates */
134.      int row;		/* current row we are checking */
135.      int lax;		/* if TRUE, pick a position in sight. */
136.      int dd;		/* distance to current point */
137.      int max_distance;	/* max distance found so far */
138.  
139.      /*
140.       * If blind and not telepathic, then it doesn't matter what we pick ---
141.       * the hero is not going to see it anyway.  So pick a nearby position.
142.       */
143.      if (Blind && !Blind_telepat) {
144.  	if (!enexto(startp, u.ux, u.uy, (struct permonst *) 0))
145.  	    return FALSE;	/* no good posiitons */
146.  	return TRUE;
147.      }
148.  
149.      /*
150.       * Arrive at an up or down stairwell if it is in line of sight from the
151.       * hero.
152.       */
153.      if (couldsee(upstair.sx, upstair.sy)) {
154.  	startp->x = upstair.sx;
155.  	startp->y = upstair.sy;
156.  	return TRUE;
157.      }
158.      if (couldsee(dnstair.sx, dnstair.sy)) {
159.  	startp->x = dnstair.sx;
160.  	startp->y = dnstair.sy;
161.  	return TRUE;
162.      }
163.  
164.      /*
165.       * Try to pick a location out of sight next to the farthest position away
166.       * from the hero.  If this fails, try again, just picking the farthest
167.       * position that could be seen.  What we really ought to be doing is
168.       * finding a path from a stairwell...
169.       *
170.       * The arrays viz_rmin[] and viz_rmax[] are set even when blind.  These
171.       * are the LOS limits for each row.
172.       */
173.      lax = 0;	/* be picky */
174.      max_distance = -1;
175.  retry:
176.      for (row = 0; row < ROWNO; row++) {
177.  	if (viz_rmin[row] < viz_rmax[row]) {
178.  	    /* There are valid positions on this row. */
179.  	    dd = distu(viz_rmin[row],row);
180.  	    if (dd > max_distance) {
181.  		if (lax) {
182.  		    max_distance = dd;
183.  		    startp->y = row;
184.  		    startp->x = viz_rmin[row];
185.  		
186.  		} else if (enexto(&testcc, (xchar)viz_rmin[row], row,
187.  						(struct permonst *) 0) &&
188.  			   !cansee(testcc.x, testcc.y) &&
189.  			   couldsee(testcc.x, testcc.y)) {
190.  		    max_distance = dd;
191.  		    *startp = testcc;
192.  		}
193.  	    }
194.  	    dd = distu(viz_rmax[row],row);
195.  	    if (dd > max_distance) {
196.  		if (lax) {
197.  		    max_distance = dd;
198.  		    startp->y = row;
199.  		    startp->x = viz_rmax[row];
200.  		
201.  		} else if (enexto(&testcc, (xchar)viz_rmax[row], row,
202.  						(struct permonst *) 0) &&
203.  			   !cansee(testcc.x,testcc.y) &&
204.  			   couldsee(testcc.x, testcc.y)) {
205.  
206.  		    max_distance = dd;
207.  		    *startp = testcc;
208.  		}
209.  	    }
210.  	}
211.      }
212.  
213.      if (max_distance < 0) {
214.  	if (!lax) {
215.  	    lax = 1;		/* just find a position */
216.  	    goto retry;
217.  	}
218.  	return FALSE;
219.      }
220.  
221.      return TRUE;
222.  }
223.  
224.  /*
225.   * Try to choose a stopping point as near as possible to the starting
226.   * position while still adjacent to the hero.  If all else fails, try
227.   * enexto().  Use enexto() as a last resort because enexto() chooses
228.   * its point randomly, which is not what we want.
229.   */
230.  STATIC_OVL boolean
231.  md_stop(stopp, startp)
232.      coord *stopp;	/* stopping position (we fill it in) */
233.      coord *startp;	/* starting positon (read only) */
234.  {
235.      int x, y, distance, min_distance = -1;
236.  
237.      for (x = u.ux-1; x <= u.ux+1; x++)
238.  	for (y = u.uy-1; y <= u.uy+1; y++) {
239.  	    if (!isok(x, y) || (x == u.ux && y == u.uy)) continue;
240.  
241.  	    if (ACCESSIBLE(levl[x][y].typ) && !MON_AT(x,y)) {
242.  		distance = dist2(x,y,startp->x,startp->y);
243.  		if (min_distance < 0 || distance < min_distance ||
244.  			(distance == min_distance && rn2(2))) {
245.  		    stopp->x = x;
246.  		    stopp->y = y;
247.  		    min_distance = distance;
248.  		}
249.  	    }
250.  	}
251.  
252.      /* If we didn't find a good spot, try enexto(). */
253.      if (min_distance < 0 &&
254.  		!enexto(stopp, u.ux, u.uy, &mons[PM_MAIL_DAEMON]))
255.  	return FALSE;
256.  
257.      return TRUE;
258.  }
259.  
260.  /* Let the mail daemon have a larger vocabulary. */
261.  static NEARDATA const char *mail_text[] = {
262.      "Gangway!",
263.      "Look out!",
264.      "Pardon me!"
265.  };
266.  #define md_exclamations()	(mail_text[rn2(3)])
267.  
268.  /*
269.   * Make the mail daemon run through the dungeon.  The daemon will run over
270.   * any monsters that are in its path, but will replace them later.  Return
271.   * FALSE if the md gets stuck in a position where there is a monster.  Return
272.   * TRUE otherwise.
273.   */
274.  STATIC_OVL boolean
275.  md_rush(md,tx,ty)
276.      struct monst *md;
277.      register int tx, ty;		/* destination of mail daemon */
278.  {
279.      struct monst *mon;			/* displaced monster */
280.      register int dx, dy;		/* direction counters */
281.      int fx = md->mx, fy = md->my;	/* current location */
282.      int nfx = fx, nfy = fy,		/* new location */
283.  	d1, d2;				/* shortest distances */
284.  
285.      /*
286.       * It is possible that the monster at (fx,fy) is not the md when:
287.       * the md rushed the hero and failed, and is now starting back.
288.       */
289.      if (m_at(fx, fy) == md) {
290.  	remove_monster(fx, fy);		/* pick up from orig position */
291.  	newsym(fx, fy);
292.      }
293.  
294.      /*
295.       * At the beginning and exit of this loop, md is not placed in the
296.       * dungeon.
297.       */
298.      while (1) {
299.  	/* Find a good location next to (fx,fy) closest to (tx,ty). */
300.  	d1 = dist2(fx,fy,tx,ty);
301.  	for (dx = -1; dx <= 1; dx++) for(dy = -1; dy <= 1; dy++)
302.  	    if ((dx || dy) && isok(fx+dx,fy+dy) &&
303.  				       !IS_STWALL(levl[fx+dx][fy+dy].typ)) {
304.  		d2 = dist2(fx+dx,fy+dy,tx,ty);
305.  		if (d2 < d1) {
306.  		    d1 = d2;
307.  		    nfx = fx+dx;
308.  		    nfy = fy+dy;
309.  		}
310.  	    }
311.  
312.  	/* Break if the md couldn't find a new position. */
313.  	if (nfx == fx && nfy == fy) break;
314.  
315.  	fx = nfx;			/* this is our new position */
316.  	fy = nfy;
317.  
318.  	/* Break if the md reaches its destination. */
319.  	if (fx == tx && fy == ty) break;
320.  
321.  	if ((mon = m_at(fx,fy)) != 0)	/* save monster at this position */
322.  	    verbalize(md_exclamations());
323.  	else if (fx == u.ux && fy == u.uy)
324.  	    verbalize("Excuse me.");
325.  
326.  	place_monster(md,fx,fy);	/* put md down */
327.  	newsym(fx,fy);			/* see it */
328.  	flush_screen(0);		/* make sure md shows up */
329.  	delay_output();			/* wait a little bit */
330.  
331.  	/* Remove md from the dungeon.  Restore original mon, if necessary. */
332.  	if (mon) {
333.  	    if ((mon->mx != fx) || (mon->my != fy))
334.  		place_worm_seg(mon, fx, fy);
335.  	    else
336.  		place_monster(mon, fx, fy);
337.  	} else
338.  	    remove_monster(fx, fy);
339.  	newsym(fx,fy);
340.      }
341.  
342.      /*
343.       * Check for a monster at our stopping position (this is possible, but
344.       * very unlikely).  If one exists, then have the md leave in disgust.
345.       */
346.      if ((mon = m_at(fx, fy)) != 0) {
347.  	place_monster(md, fx, fy);	/* display md with text below */
348.  	newsym(fx, fy);
349.  	verbalize("This place's too crowded.  I'm outta here.");
350.  
351.  	if ((mon->mx != fx) || (mon->my != fy))	/* put mon back */
352.  	    place_worm_seg(mon, fx, fy);
353.  	else
354.  	    place_monster(mon, fx, fy);
355.  
356.  	newsym(fx, fy);
357.  	return FALSE;
358.      }
359.  
360.      place_monster(md, fx, fy);	/* place at final spot */
361.      newsym(fx, fy);
362.      flush_screen(0);
363.      delay_output();			/* wait a little bit */
364.  
365.      return TRUE;
366.  }
367.  
368.  /* Deliver a scroll of mail. */
369.  /*ARGSUSED*/
370.  STATIC_OVL void
371.  newmail(info)
372.  struct mail_info *info;
373.  {
374.      struct monst *md;
375.      coord start, stop;
376.      boolean message_seen = FALSE;
377.  
378.      /* Try to find good starting and stopping places. */
379.      if (!md_start(&start) || !md_stop(&stop,&start)) goto give_up;
380.  
381.      /* Make the daemon.  Have it rush towards the hero. */
382.      if (!(md = makemon(&mons[PM_MAIL_DAEMON], start.x, start.y, NO_MM_FLAGS)))
383.  	 goto give_up;
384.      if (!md_rush(md, stop.x, stop.y)) goto go_back;
385.  
386.      message_seen = TRUE;
387.      verbalize("%s, %s!  %s.", Hello(md), plname, info->display_txt);
388.  
389.      if (info->message_typ) {
390.  	struct obj *obj = mksobj(SCR_MAIL, FALSE, FALSE);
391.  	if (distu(md->mx,md->my) > 2)
392.  	    verbalize("Catch!");
393.  	display_nhwindow(WIN_MESSAGE, FALSE);
394.  	if (info->object_nam) {
395.  	    obj = oname(obj, info->object_nam);
396.  	    if (info->response_cmd) {	/*(hide extension of the obj name)*/
397.  		int namelth = info->response_cmd - info->object_nam - 1;
398.  		if ( namelth <= 0 || namelth >= (int) obj->onamelth )
399.  		    impossible("mail delivery screwed up");
400.  		else
401.  		    *(ONAME(obj) + namelth) = '\0';
402.  		/* Note: renaming object will discard the hidden command. */
403.  	    }
404.  	}
405.  	obj = hold_another_object(obj, "Oops!",
406.  				  (const char *)0, (const char *)0);
407.      }
408.  
409.      /* zip back to starting location */
410.  go_back:
411.      (void) md_rush(md, start.x, start.y);
412.      mongone(md);
413.      /* deliver some classes of messages even if no daemon ever shows up */
414.  give_up:
415.      if (!message_seen && info->message_typ == MSG_OTHER)
416.  	pline("Hark!  \"%s.\"", info->display_txt);
417.  }
418.  
419.  # if !defined(UNIX) && !defined(VMS) && !defined(LAN_MAIL)
420.  
421.  void
422.  ckmailstatus()
423.  {
424.  	if (u.uswallow || !flags.biff) return;
425.  	if (mustgetmail < 0) {
426.  #if defined(AMIGA) || defined(MSDOS) || defined(TOS) || defined(OS2)
427.  	    mustgetmail=(moves<2000)?(100+rn2(2000)):(2000+rn2(3000));
428.  #endif
429.  	    return;
430.  	}
431.  	if (--mustgetmail <= 0) {
432.  		static struct mail_info
433.  			deliver = {MSG_MAIL,"I have some mail for you",0,0};
434.  		newmail(&deliver);
435.  		mustgetmail = -1;
436.  	}
437.  }
438.  
439.  /*ARGSUSED*/
440.  void
441.  readmail(otmp)
442.  struct obj *otmp;
443.  {
444.      const char *line;
445.      char buf[BUFSZ];
446.      line = getrumor(bcsign(otmp), buf, TRUE);
447.      if (!*line)
448.  	   line = "NetHack rumors file closed for renovation.";
449.      if (Blind) {
450.  	pline("Unfortunately you cannot see what it says.");
451.      } else
452.  	pline("It reads:  \"%s\"", line);
453.  
454.  }
455.  
456.  # endif /* !UNIX && !VMS */
457.  
458.  # ifdef UNIX
459.  
460.  void
461.  ckmailstatus()
462.  {
463.  	if(!mailbox || u.uswallow || !flags.biff
464.  #  ifdef MAILCKFREQ
465.  		    || moves < laststattime + MAILCKFREQ
466.  #  endif
467.  							)
468.  		return;
469.  
470.  	laststattime = moves;
471.  	if(stat(mailbox, &nmstat)){
472.  #  ifdef PERMANENT_MAILBOX
473.  		pline("Cannot get status of MAIL=\"%s\" anymore.", mailbox);
474.  		mailbox = 0;
475.  #  else
476.  		nmstat.st_mtime = 0;
477.  #  endif
478.  	} else if(nmstat.st_mtime > omstat.st_mtime) {
479.  		if (nmstat.st_size) {
480.  		    static struct mail_info deliver = {
481.  #  ifndef NO_MAILREADER
482.  			MSG_MAIL, "I have some mail for you",
483.  #  else
484.  			/* suppress creation and delivery of scroll of mail */
485.  			MSG_OTHER, "You have some mail in the outside world",
486.  #  endif
487.  			0, 0
488.  		    };
489.  		    newmail(&deliver);
490.  		}
491.  		getmailstatus();	/* might be too late ... */
492.  	}
493.  }
494.  
495.  /*ARGSUSED*/
496.  void
497.  readmail(otmp)
498.  struct obj *otmp;
499.  {
500.  #  ifdef DEF_MAILREADER			/* This implies that UNIX is defined */
501.  	register const char *mr = 0;
502.  
503.  	display_nhwindow(WIN_MESSAGE, FALSE);
504.  	if(!(mr = nh_getenv("MAILREADER")))
505.  		mr = DEF_MAILREADER;
506.  
507.  	if(child(1)){
508.  		(void) execl(mr, mr, (char *)0);
509.  		terminate(EXIT_FAILURE);
510.  	}
511.  #  else
512.  #   ifndef AMS				/* AMS mailboxes are directories */
513.  	display_file_area(NULL, mailbox, TRUE);
514.  #   endif /* AMS */
515.  #  endif /* DEF_MAILREADER */
516.  
517.  	/* get new stat; not entirely correct: there is a small time
518.  	   window where we do not see new mail */
519.  	getmailstatus();
520.  }
521.  
522.  # endif /* UNIX */
523.  
524.  # ifdef VMS
525.  
526.  extern NDECL(struct mail_info *parse_next_broadcast);
527.  
528.  volatile int broadcasts = 0;
529.  
530.  void
531.  ckmailstatus()
532.  {
533.      struct mail_info *brdcst;
534.  
535.      if(u.uswallow || !flags.biff) return;
536.  
537.      while (broadcasts > 0) {	/* process all trapped broadcasts [until] */
538.  	broadcasts--;
539.  	if ((brdcst = parse_next_broadcast()) != 0) {
540.  	    newmail(brdcst);
541.  	    break;		/* only handle one real message at a time */
542.  	}
543.      }
544.  }
545.  
546.  void
547.  readmail(otmp)
548.  struct obj *otmp;
549.  {
550.  #  ifdef SHELL	/* can't access mail reader without spawning subprocess */
551.      const char *txt, *cmd;
552.      char *p, buf[BUFSZ], qbuf[BUFSZ];
553.      int len;
554.  
555.      /* there should be a command hidden beyond the object name */
556.      txt = otmp->onamelth ? ONAME(otmp) : "";
557.      len = strlen(txt);
558.      cmd = (len + 1 < otmp->onamelth) ? txt + len + 1 : (char *) 0;
559.      if (!cmd || !*cmd) cmd = "SPAWN";
560.  
561.      Sprintf(qbuf, "System command (%s)", cmd);
562.      getlin(qbuf, buf);
563.      if (*buf != '\033') {
564.  	for (p = eos(buf); p > buf; *p = '\0')
565.  	    if (*--p != ' ') break;	/* strip trailing spaces */
566.  	if (*buf) cmd = buf;		/* use user entered command */
567.  	if (!strcmpi(cmd, "SPAWN") || !strcmp(cmd, "!"))
568.  	    cmd = (char *) 0;		/* interactive escape */
569.  
570.  	vms_doshell(cmd, TRUE);
571.  	(void) sleep(1);
572.      }
573.  #  endif /* SHELL */
574.  }
575.  
576.  # endif /* VMS */
577.  
578.  # ifdef LAN_MAIL
579.  
580.  void
581.  ckmailstatus()
582.  {
583.  	static int laststattime = 0;
584.  	
585.  	if(u.uswallow || !flags.biff
586.  #  ifdef MAILCKFREQ
587.  		    || moves < laststattime + MAILCKFREQ
588.  #  endif
589.  							)
590.  		return;
591.  
592.  	laststattime = moves;
593.  	if (lan_mail_check()) {
594.  		    static struct mail_info deliver = {
595.  #  ifndef NO_MAILREADER
596.  			MSG_MAIL, "I have some mail for you",
597.  #  else
598.  			/* suppress creation and delivery of scroll of mail */
599.  			MSG_OTHER, "You have some mail in the outside world",
600.  #  endif
601.  			0, 0
602.  		    };
603.  		    newmail(&deliver);
604.  	}
605.  }
606.  
607.  /*ARGSUSED*/
608.  void
609.  readmail(otmp)
610.  struct obj *otmp;
611.  {
612.  	lan_mail_read(otmp);
613.  }
614.  
615.  # endif /* LAN_MAIL */
616.  
617.  #endif /* OVL0 */
618.  
619.  #endif /* MAIL */
620.  
621.  /*mail.c*/