Source:NetHack 3.4.0/mail.c
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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. /* DO trust all SVR4 to typedef uid_t in <sys/types.h> (probably to a long) */ 57. # if defined(POSIX_TYPES) || defined(SVR4) || defined(HPUX) 58. extern struct passwd *FDECL(getpwuid,(uid_t)); 59. # else 60. extern struct passwd *FDECL(getpwuid,(int)); 61. # endif 62. # endif 63. # endif 64. static struct stat omstat,nmstat; 65. static char *mailbox = (char *)0; 66. static long laststattime; 67. 68. # if !defined(MAILPATH) && defined(AMS) /* Just a placeholder for AMS */ 69. # define MAILPATH "/dev/null" 70. # endif 71. # if !defined(MAILPATH) && (defined(LINUX) || defined(__osf__)) 72. # define MAILPATH "/var/spool/mail/" 73. # endif 74. # if !defined(MAILPATH) && defined(__FreeBSD__) 75. # define MAILPATH "/var/mail/" 76. # endif 77. # if !defined(MAILPATH) && (defined(BSD) || defined(ULTRIX)) 78. # define MAILPATH "/usr/spool/mail/" 79. # endif 80. # if !defined(MAILPATH) && (defined(SYSV) || defined(HPUX)) 81. # define MAILPATH "/usr/mail/" 82. # endif 83. 84. void 85. getmailstatus() 86. { 87. if(!mailbox && !(mailbox = nh_getenv("MAIL"))) { 88. # ifdef MAILPATH 89. # ifdef AMS 90. struct passwd ppasswd; 91. 92. (void) memcpy(&ppasswd, getpwuid(getuid()), sizeof(struct passwd)); 93. if (ppasswd.pw_dir) { 94. mailbox = (char *) alloc((unsigned) strlen(ppasswd.pw_dir)+sizeof(AMS_MAILBOX)); 95. Strcpy(mailbox, ppasswd.pw_dir); 96. Strcat(mailbox, AMS_MAILBOX); 97. } else 98. return; 99. # else 100. const char *pw_name = getpwuid(getuid())->pw_name; 101. mailbox = (char *) alloc(sizeof(MAILPATH)+strlen(pw_name)); 102. Strcpy(mailbox, MAILPATH); 103. Strcat(mailbox, pw_name); 104. # endif /* AMS */ 105. # else 106. return; 107. # endif 108. } 109. if(stat(mailbox, &omstat)){ 110. # ifdef PERMANENT_MAILBOX 111. pline("Cannot get status of MAIL=\"%s\".", mailbox); 112. mailbox = 0; 113. # else 114. omstat.st_mtime = 0; 115. # endif 116. } 117. } 118. # endif /* UNIX */ 119. 120. #endif /* OVLB */ 121. #ifdef OVL0 122. 123. /* 124. * Pick coordinates for a starting position for the mail daemon. Called 125. * from newmail() and newphone(). 126. */ 127. STATIC_OVL boolean 128. md_start(startp) 129. coord *startp; 130. { 131. coord testcc; /* scratch coordinates */ 132. int row; /* current row we are checking */ 133. int lax; /* if TRUE, pick a position in sight. */ 134. int dd; /* distance to current point */ 135. int max_distance; /* max distance found so far */ 136. 137. /* 138. * If blind and not telepathic, then it doesn't matter what we pick --- 139. * the hero is not going to see it anyway. So pick a nearby position. 140. */ 141. if (Blind && !Blind_telepat) { 142. if (!enexto(startp, u.ux, u.uy, (struct permonst *) 0)) 143. return FALSE; /* no good posiitons */ 144. return TRUE; 145. } 146. 147. /* 148. * Arrive at an up or down stairwell if it is in line of sight from the 149. * hero. 150. */ 151. if (couldsee(upstair.sx, upstair.sy)) { 152. startp->x = upstair.sx; 153. startp->y = upstair.sy; 154. return TRUE; 155. } 156. if (couldsee(dnstair.sx, dnstair.sy)) { 157. startp->x = dnstair.sx; 158. startp->y = dnstair.sy; 159. return TRUE; 160. } 161. 162. /* 163. * Try to pick a location out of sight next to the farthest position away 164. * from the hero. If this fails, try again, just picking the farthest 165. * position that could be seen. What we really ought to be doing is 166. * finding a path from a stairwell... 167. * 168. * The arrays viz_rmin[] and viz_rmax[] are set even when blind. These 169. * are the LOS limits for each row. 170. */ 171. lax = 0; /* be picky */ 172. max_distance = -1; 173. retry: 174. for (row = 0; row < ROWNO; row++) { 175. if (viz_rmin[row] < viz_rmax[row]) { 176. /* There are valid positions on this row. */ 177. dd = distu(viz_rmin[row],row); 178. if (dd > max_distance) { 179. if (lax) { 180. max_distance = dd; 181. startp->y = row; 182. startp->x = viz_rmin[row]; 183. 184. } else if (enexto(&testcc, (xchar)viz_rmin[row], row, 185. (struct permonst *) 0) && 186. !cansee(testcc.x, testcc.y) && 187. couldsee(testcc.x, testcc.y)) { 188. max_distance = dd; 189. *startp = testcc; 190. } 191. } 192. dd = distu(viz_rmax[row],row); 193. if (dd > max_distance) { 194. if (lax) { 195. max_distance = dd; 196. startp->y = row; 197. startp->x = viz_rmax[row]; 198. 199. } else if (enexto(&testcc, (xchar)viz_rmax[row], row, 200. (struct permonst *) 0) && 201. !cansee(testcc.x,testcc.y) && 202. couldsee(testcc.x, testcc.y)) { 203. 204. max_distance = dd; 205. *startp = testcc; 206. } 207. } 208. } 209. } 210. 211. if (max_distance < 0) { 212. if (!lax) { 213. lax = 1; /* just find a position */ 214. goto retry; 215. } 216. return FALSE; 217. } 218. 219. return TRUE; 220. } 221. 222. /* 223. * Try to choose a stopping point as near as possible to the starting 224. * position while still adjacent to the hero. If all else fails, try 225. * enexto(). Use enexto() as a last resort because enexto() chooses 226. * its point randomly, which is not what we want. 227. */ 228. STATIC_OVL boolean 229. md_stop(stopp, startp) 230. coord *stopp; /* stopping position (we fill it in) */ 231. coord *startp; /* starting positon (read only) */ 232. { 233. int x, y, distance, min_distance = -1; 234. 235. for (x = u.ux-1; x <= u.ux+1; x++) 236. for (y = u.uy-1; y <= u.uy+1; y++) { 237. if (!isok(x, y) || (x == u.ux && y == u.uy)) continue; 238. 239. if (ACCESSIBLE(levl[x][y].typ) && !MON_AT(x,y)) { 240. distance = dist2(x,y,startp->x,startp->y); 241. if (min_distance < 0 || distance < min_distance || 242. (distance == min_distance && rn2(2))) { 243. stopp->x = x; 244. stopp->y = y; 245. min_distance = distance; 246. } 247. } 248. } 249. 250. /* If we didn't find a good spot, try enexto(). */ 251. if (min_distance < 0 && 252. !enexto(stopp, u.ux, u.uy, &mons[PM_MAIL_DAEMON])) 253. return FALSE; 254. 255. return TRUE; 256. } 257. 258. /* Let the mail daemon have a larger vocabulary. */ 259. static NEARDATA const char *mail_text[] = { 260. "Gangway!", 261. "Look out!", 262. "Pardon me!" 263. }; 264. #define md_exclamations() (mail_text[rn2(3)]) 265. 266. /* 267. * Make the mail daemon run through the dungeon. The daemon will run over 268. * any monsters that are in its path, but will replace them later. Return 269. * FALSE if the md gets stuck in a position where there is a monster. Return 270. * TRUE otherwise. 271. */ 272. STATIC_OVL boolean 273. md_rush(md,tx,ty) 274. struct monst *md; 275. register int tx, ty; /* destination of mail daemon */ 276. { 277. struct monst *mon; /* displaced monster */ 278. register int dx, dy; /* direction counters */ 279. int fx = md->mx, fy = md->my; /* current location */ 280. int nfx = fx, nfy = fy, /* new location */ 281. d1, d2; /* shortest distances */ 282. 283. /* 284. * It is possible that the monster at (fx,fy) is not the md when: 285. * the md rushed the hero and failed, and is now starting back. 286. */ 287. if (m_at(fx, fy) == md) { 288. remove_monster(fx, fy); /* pick up from orig position */ 289. newsym(fx, fy); 290. } 291. 292. /* 293. * At the beginning and exit of this loop, md is not placed in the 294. * dungeon. 295. */ 296. while (1) { 297. /* Find a good location next to (fx,fy) closest to (tx,ty). */ 298. d1 = dist2(fx,fy,tx,ty); 299. for (dx = -1; dx <= 1; dx++) for(dy = -1; dy <= 1; dy++) 300. if ((dx || dy) && isok(fx+dx,fy+dy) && 301. !IS_STWALL(levl[fx+dx][fy+dy].typ)) { 302. d2 = dist2(fx+dx,fy+dy,tx,ty); 303. if (d2 < d1) { 304. d1 = d2; 305. nfx = fx+dx; 306. nfy = fy+dy; 307. } 308. } 309. 310. /* Break if the md couldn't find a new position. */ 311. if (nfx == fx && nfy == fy) break; 312. 313. fx = nfx; /* this is our new position */ 314. fy = nfy; 315. 316. /* Break if the md reaches its destination. */ 317. if (fx == tx && fy == ty) break; 318. 319. if ((mon = m_at(fx,fy)) != 0) /* save monster at this position */ 320. verbalize(md_exclamations()); 321. else if (fx == u.ux && fy == u.uy) 322. verbalize("Excuse me."); 323. 324. place_monster(md,fx,fy); /* put md down */ 325. newsym(fx,fy); /* see it */ 326. flush_screen(0); /* make sure md shows up */ 327. delay_output(); /* wait a little bit */ 328. 329. /* Remove md from the dungeon. Restore original mon, if necessary. */ 330. if (mon) { 331. if ((mon->mx != fx) || (mon->my != fy)) 332. place_worm_seg(mon, fx, fy); 333. else 334. place_monster(mon, fx, fy); 335. } else 336. remove_monster(fx, fy); 337. newsym(fx,fy); 338. } 339. 340. /* 341. * Check for a monster at our stopping position (this is possible, but 342. * very unlikely). If one exists, then have the md leave in disgust. 343. */ 344. if ((mon = m_at(fx, fy)) != 0) { 345. place_monster(md, fx, fy); /* display md with text below */ 346. newsym(fx, fy); 347. verbalize("This place's too crowded. I'm outta here."); 348. 349. if ((mon->mx != fx) || (mon->my != fy)) /* put mon back */ 350. place_worm_seg(mon, fx, fy); 351. else 352. place_monster(mon, fx, fy); 353. 354. newsym(fx, fy); 355. return FALSE; 356. } 357. 358. place_monster(md, fx, fy); /* place at final spot */ 359. newsym(fx, fy); 360. flush_screen(0); 361. delay_output(); /* wait a little bit */ 362. 363. return TRUE; 364. } 365. 366. /* Deliver a scroll of mail. */ 367. /*ARGSUSED*/ 368. STATIC_OVL void 369. newmail(info) 370. struct mail_info *info; 371. { 372. struct monst *md; 373. coord start, stop; 374. boolean message_seen = FALSE; 375. 376. /* Try to find good starting and stopping places. */ 377. if (!md_start(&start) || !md_stop(&stop,&start)) goto give_up; 378. 379. /* Make the daemon. Have it rush towards the hero. */ 380. if (!(md = makemon(&mons[PM_MAIL_DAEMON], start.x, start.y, NO_MM_FLAGS))) 381. goto give_up; 382. if (!md_rush(md, stop.x, stop.y)) goto go_back; 383. 384. message_seen = TRUE; 385. verbalize("%s, %s! %s.", Hello(md), plname, info->display_txt); 386. 387. if (info->message_typ) { 388. struct obj *obj = mksobj(SCR_MAIL, FALSE, FALSE); 389. if (distu(md->mx,md->my) > 2) 390. verbalize("Catch!"); 391. display_nhwindow(WIN_MESSAGE, FALSE); 392. if (info->object_nam) { 393. obj = oname(obj, info->object_nam); 394. if (info->response_cmd) { /*(hide extension of the obj name)*/ 395. int namelth = info->response_cmd - info->object_nam - 1; 396. if ( namelth <= 0 || namelth >= (int) obj->onamelth ) 397. impossible("mail delivery screwed up"); 398. else 399. *(ONAME(obj) + namelth) = '\0'; 400. /* Note: renaming object will discard the hidden command. */ 401. } 402. } 403. obj = hold_another_object(obj, "Oops!", 404. (const char *)0, (const char *)0); 405. } 406. 407. /* zip back to starting location */ 408. go_back: 409. (void) md_rush(md, start.x, start.y); 410. mongone(md); 411. /* deliver some classes of messages even if no daemon ever shows up */ 412. give_up: 413. if (!message_seen && info->message_typ == MSG_OTHER) 414. pline("Hark! \"%s.\"", info->display_txt); 415. } 416. 417. # if !defined(UNIX) && !defined(VMS) && !defined(LAN_MAIL) 418. 419. void 420. ckmailstatus() 421. { 422. if (u.uswallow || !flags.biff) return; 423. if (mustgetmail < 0) { 424. #if defined(AMIGA) || defined(MSDOS) || defined(TOS) 425. mustgetmail=(moves<2000)?(100+rn2(2000)):(2000+rn2(3000)); 426. #endif 427. return; 428. } 429. if (--mustgetmail <= 0) { 430. static struct mail_info 431. deliver = {MSG_MAIL,"I have some mail for you",0,0}; 432. newmail(&deliver); 433. mustgetmail = -1; 434. } 435. } 436. 437. /*ARGSUSED*/ 438. void 439. readmail(otmp) 440. struct obj *otmp; 441. { 442. static char *junk[] = { 443. "Please disregard previous letter.", 444. "Welcome to NetHack.", 445. #ifdef AMIGA 446. "Only Amiga makes it possible.", 447. "CATS have all the answers.", 448. #endif 449. "Report bugs to <devteam@nethack.org>.", 450. "Invitation: Visit the NetHack web site at http://www.nethack.org!" 451. }; 452. 453. if (Blind) { 454. pline("Unfortunately you cannot see what it says."); 455. } else 456. pline("It reads: \"%s\"", junk[rn2(SIZE(junk))]); 457. 458. } 459. 460. # endif /* !UNIX && !VMS && !LAN_MAIL */ 461. 462. # ifdef UNIX 463. 464. void 465. ckmailstatus() 466. { 467. if(!mailbox || u.uswallow || !flags.biff 468. # ifdef MAILCKFREQ 469. || moves < laststattime + MAILCKFREQ 470. # endif 471. ) 472. return; 473. 474. laststattime = moves; 475. if(stat(mailbox, &nmstat)){ 476. # ifdef PERMANENT_MAILBOX 477. pline("Cannot get status of MAIL=\"%s\" anymore.", mailbox); 478. mailbox = 0; 479. # else 480. nmstat.st_mtime = 0; 481. # endif 482. } else if(nmstat.st_mtime > omstat.st_mtime) { 483. if (nmstat.st_size) { 484. static struct mail_info deliver = { 485. # ifndef NO_MAILREADER 486. MSG_MAIL, "I have some mail for you", 487. # else 488. /* suppress creation and delivery of scroll of mail */ 489. MSG_OTHER, "You have some mail in the outside world", 490. # endif 491. 0, 0 492. }; 493. newmail(&deliver); 494. } 495. getmailstatus(); /* might be too late ... */ 496. } 497. } 498. 499. /*ARGSUSED*/ 500. void 501. readmail(otmp) 502. struct obj *otmp; 503. { 504. # ifdef DEF_MAILREADER /* This implies that UNIX is defined */ 505. register const char *mr = 0; 506. 507. display_nhwindow(WIN_MESSAGE, FALSE); 508. if(!(mr = nh_getenv("MAILREADER"))) 509. mr = DEF_MAILREADER; 510. 511. if(child(1)){ 512. (void) execl(mr, mr, (char *)0); 513. terminate(EXIT_FAILURE); 514. } 515. # else 516. # ifndef AMS /* AMS mailboxes are directories */ 517. display_file(mailbox, TRUE); 518. # endif /* AMS */ 519. # endif /* DEF_MAILREADER */ 520. 521. /* get new stat; not entirely correct: there is a small time 522. window where we do not see new mail */ 523. getmailstatus(); 524. } 525. 526. # endif /* UNIX */ 527. 528. # ifdef VMS 529. 530. extern NDECL(struct mail_info *parse_next_broadcast); 531. 532. volatile int broadcasts = 0; 533. 534. void 535. ckmailstatus() 536. { 537. struct mail_info *brdcst; 538. 539. if (u.uswallow || !flags.biff) return; 540. 541. while (broadcasts > 0) { /* process all trapped broadcasts [until] */ 542. broadcasts--; 543. if ((brdcst = parse_next_broadcast()) != 0) { 544. newmail(brdcst); 545. break; /* only handle one real message at a time */ 546. } 547. } 548. } 549. 550. void 551. readmail(otmp) 552. struct obj *otmp; 553. { 554. # ifdef SHELL /* can't access mail reader without spawning subprocess */ 555. const char *txt, *cmd; 556. char *p, buf[BUFSZ], qbuf[BUFSZ]; 557. int len; 558. 559. /* there should be a command hidden beyond the object name */ 560. txt = otmp->onamelth ? ONAME(otmp) : ""; 561. len = strlen(txt); 562. cmd = (len + 1 < otmp->onamelth) ? txt + len + 1 : (char *) 0; 563. if (!cmd || !*cmd) cmd = "SPAWN"; 564. 565. Sprintf(qbuf, "System command (%s)", cmd); 566. getlin(qbuf, buf); 567. if (*buf != '\033') { 568. for (p = eos(buf); p > buf; *p = '\0') 569. if (*--p != ' ') break; /* strip trailing spaces */ 570. if (*buf) cmd = buf; /* use user entered command */ 571. if (!strcmpi(cmd, "SPAWN") || !strcmp(cmd, "!")) 572. cmd = (char *) 0; /* interactive escape */ 573. 574. vms_doshell(cmd, TRUE); 575. (void) sleep(1); 576. } 577. # endif /* SHELL */ 578. } 579. 580. # endif /* VMS */ 581. 582. # ifdef LAN_MAIL 583. 584. void 585. ckmailstatus() 586. { 587. static int laststattime = 0; 588. 589. if(u.uswallow || !flags.biff 590. # ifdef MAILCKFREQ 591. || moves < laststattime + MAILCKFREQ 592. # endif 593. ) 594. return; 595. 596. laststattime = moves; 597. if (lan_mail_check()) { 598. static struct mail_info deliver = { 599. # ifndef NO_MAILREADER 600. MSG_MAIL, "I have some mail for you", 601. # else 602. /* suppress creation and delivery of scroll of mail */ 603. MSG_OTHER, "You have some mail in the outside world", 604. # endif 605. 0, 0 606. }; 607. newmail(&deliver); 608. } 609. } 610. 611. /*ARGSUSED*/ 612. void 613. readmail(otmp) 614. struct obj *otmp; 615. { 616. lan_mail_read(otmp); 617. } 618. 619. # endif /* LAN_MAIL */ 620. 621. #endif /* OVL0 */ 622. 623. #endif /* MAIL */ 624. 625. /*mail.c*/
