Source:SLASH'EM 0.0.7E7F2/mail.c
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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 [[Source:SLASH'EM 0.0.7E7F2/mail.c#line123]], for example.
Source code for vanilla NetHack is at Source code.
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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*/