1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)deliver.c 8.78 (Berkeley) 03/11/94"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <netdb.h> 15 #include <errno.h> 16 #if NAMED_BIND 17 #include <arpa/nameser.h> 18 #include <resolv.h> 19 20 extern int h_errno; 21 #endif 22 23 extern char SmtpError[]; 24 25 /* 26 ** SENDALL -- actually send all the messages. 27 ** 28 ** Parameters: 29 ** e -- the envelope to send. 30 ** mode -- the delivery mode to use. If SM_DEFAULT, use 31 ** the current e->e_sendmode. 32 ** 33 ** Returns: 34 ** none. 35 ** 36 ** Side Effects: 37 ** Scans the send lists and sends everything it finds. 38 ** Delivers any appropriate error messages. 39 ** If we are running in a non-interactive mode, takes the 40 ** appropriate action. 41 */ 42 43 sendall(e, mode) 44 ENVELOPE *e; 45 char mode; 46 { 47 register ADDRESS *q; 48 char *owner; 49 int otherowners; 50 register ENVELOPE *ee; 51 ENVELOPE *splitenv = NULL; 52 bool announcequeueup; 53 54 /* 55 ** If we have had global, fatal errors, don't bother sending 56 ** the message at all if we are in SMTP mode. Local errors 57 ** (e.g., a single address failing) will still cause the other 58 ** addresses to be sent. 59 */ 60 61 if (bitset(EF_FATALERRS, e->e_flags) && 62 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 63 { 64 e->e_flags |= EF_CLRQUEUE; 65 return; 66 } 67 68 /* determine actual delivery mode */ 69 CurrentLA = getla(); 70 if (mode == SM_DEFAULT) 71 { 72 mode = e->e_sendmode; 73 if (mode != SM_VERIFY && 74 shouldqueue(e->e_msgpriority, e->e_ctime)) 75 mode = SM_QUEUE; 76 announcequeueup = mode == SM_QUEUE; 77 } 78 else 79 announcequeueup = FALSE; 80 81 if (tTd(13, 1)) 82 { 83 printf("\n===== SENDALL: mode %c, id %s, e_from ", 84 mode, e->e_id); 85 printaddr(&e->e_from, FALSE); 86 printf("sendqueue:\n"); 87 printaddr(e->e_sendqueue, TRUE); 88 } 89 90 /* 91 ** Do any preprocessing necessary for the mode we are running. 92 ** Check to make sure the hop count is reasonable. 93 ** Delete sends to the sender in mailing lists. 94 */ 95 96 CurEnv = e; 97 98 if (e->e_hopcount > MaxHopCount) 99 { 100 errno = 0; 101 e->e_flags |= EF_FATALERRS|EF_PM_NOTIFY|EF_CLRQUEUE; 102 syserr("554 too many hops %d (%d max): from %s via %s, to %s", 103 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 104 RealHostName == NULL ? "localhost" : RealHostName, 105 e->e_sendqueue->q_paddr); 106 return; 107 } 108 109 /* 110 ** Do sender deletion. 111 ** 112 ** If the sender has the QQUEUEUP flag set, skip this. 113 ** This can happen if the name server is hosed when you 114 ** are trying to send mail. The result is that the sender 115 ** is instantiated in the queue as a recipient. 116 */ 117 118 if (!bitset(EF_METOO, e->e_flags) && 119 !bitset(QQUEUEUP, e->e_from.q_flags)) 120 { 121 if (tTd(13, 5)) 122 { 123 printf("sendall: QDONTSEND "); 124 printaddr(&e->e_from, FALSE); 125 } 126 e->e_from.q_flags |= QDONTSEND; 127 (void) recipient(&e->e_from, &e->e_sendqueue, e); 128 } 129 130 /* 131 ** Handle alias owners. 132 ** 133 ** We scan up the q_alias chain looking for owners. 134 ** We discard owners that are the same as the return path. 135 */ 136 137 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 138 { 139 register struct address *a; 140 141 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 142 continue; 143 if (a != NULL) 144 q->q_owner = a->q_owner; 145 146 if (q->q_owner != NULL && 147 !bitset(QDONTSEND, q->q_flags) && 148 strcmp(q->q_owner, e->e_from.q_paddr) == 0) 149 q->q_owner = NULL; 150 } 151 152 owner = ""; 153 otherowners = 1; 154 while (owner != NULL && otherowners > 0) 155 { 156 owner = NULL; 157 otherowners = 0; 158 159 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 160 { 161 if (bitset(QDONTSEND, q->q_flags)) 162 continue; 163 164 if (q->q_owner != NULL) 165 { 166 if (owner == NULL) 167 owner = q->q_owner; 168 else if (owner != q->q_owner) 169 { 170 if (strcmp(owner, q->q_owner) == 0) 171 { 172 /* make future comparisons cheap */ 173 q->q_owner = owner; 174 } 175 else 176 { 177 otherowners++; 178 } 179 owner = q->q_owner; 180 } 181 } 182 else 183 { 184 otherowners++; 185 } 186 } 187 188 if (owner != NULL && otherowners > 0) 189 { 190 extern HDR *copyheader(); 191 extern ADDRESS *copyqueue(); 192 193 /* 194 ** Split this envelope into two. 195 */ 196 197 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 198 *ee = *e; 199 ee->e_id = NULL; 200 (void) queuename(ee, '\0'); 201 202 if (tTd(13, 1)) 203 printf("sendall: split %s into %s\n", 204 e->e_id, ee->e_id); 205 206 ee->e_header = copyheader(e->e_header); 207 ee->e_sendqueue = copyqueue(e->e_sendqueue); 208 ee->e_errorqueue = copyqueue(e->e_errorqueue); 209 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS); 210 setsender(owner, ee, NULL, TRUE); 211 if (tTd(13, 5)) 212 { 213 printf("sendall(split): QDONTSEND "); 214 printaddr(&ee->e_from, FALSE); 215 } 216 ee->e_from.q_flags |= QDONTSEND; 217 ee->e_dfp = NULL; 218 ee->e_xfp = NULL; 219 ee->e_df = NULL; 220 ee->e_errormode = EM_MAIL; 221 ee->e_sibling = splitenv; 222 splitenv = ee; 223 224 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 225 if (q->q_owner == owner) 226 { 227 q->q_flags |= QDONTSEND; 228 q->q_flags &= ~QQUEUEUP; 229 } 230 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 231 if (q->q_owner != owner) 232 { 233 q->q_flags |= QDONTSEND; 234 q->q_flags &= ~QQUEUEUP; 235 } 236 237 if (e->e_df != NULL && mode != SM_VERIFY) 238 { 239 ee->e_dfp = NULL; 240 ee->e_df = queuename(ee, 'd'); 241 ee->e_df = newstr(ee->e_df); 242 if (link(e->e_df, ee->e_df) < 0) 243 { 244 syserr("sendall: link(%s, %s)", 245 e->e_df, ee->e_df); 246 } 247 } 248 #ifdef LOG 249 if (LogLevel > 4) 250 syslog(LOG_INFO, "%s: clone %s, owner=%s", 251 ee->e_id, e->e_id, owner); 252 #endif 253 } 254 } 255 256 if (owner != NULL) 257 { 258 setsender(owner, e, NULL, TRUE); 259 if (tTd(13, 5)) 260 { 261 printf("sendall(owner): QDONTSEND "); 262 printaddr(&e->e_from, FALSE); 263 } 264 e->e_from.q_flags |= QDONTSEND; 265 e->e_errormode = EM_MAIL; 266 } 267 268 # ifdef QUEUE 269 if ((mode == SM_QUEUE || mode == SM_FORK || 270 (mode != SM_VERIFY && SuperSafe)) && 271 !bitset(EF_INQUEUE, e->e_flags)) 272 { 273 /* be sure everything is instantiated in the queue */ 274 queueup(e, TRUE, announcequeueup); 275 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 276 queueup(ee, TRUE, announcequeueup); 277 } 278 #endif /* QUEUE */ 279 280 if (splitenv != NULL) 281 { 282 if (tTd(13, 1)) 283 { 284 printf("\nsendall: Split queue; remaining queue:\n"); 285 printaddr(e->e_sendqueue, TRUE); 286 } 287 288 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 289 { 290 CurEnv = ee; 291 if (mode != SM_VERIFY) 292 openxscript(ee); 293 sendenvelope(ee, mode); 294 dropenvelope(ee); 295 } 296 297 CurEnv = e; 298 } 299 sendenvelope(e, mode); 300 } 301 302 sendenvelope(e, mode) 303 register ENVELOPE *e; 304 char mode; 305 { 306 bool oldverbose; 307 int pid; 308 register ADDRESS *q; 309 char *qf; 310 char *id; 311 312 /* 313 ** If we have had global, fatal errors, don't bother sending 314 ** the message at all if we are in SMTP mode. Local errors 315 ** (e.g., a single address failing) will still cause the other 316 ** addresses to be sent. 317 */ 318 319 if (bitset(EF_FATALERRS, e->e_flags) && 320 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 321 { 322 e->e_flags |= EF_CLRQUEUE; 323 return; 324 } 325 326 oldverbose = Verbose; 327 switch (mode) 328 { 329 case SM_VERIFY: 330 Verbose = TRUE; 331 break; 332 333 case SM_QUEUE: 334 queueonly: 335 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 336 return; 337 338 case SM_FORK: 339 if (e->e_xfp != NULL) 340 (void) fflush(e->e_xfp); 341 342 # if !HASFLOCK 343 /* 344 ** Since fcntl locking has the interesting semantic that 345 ** the lock is owned by a process, not by an open file 346 ** descriptor, we have to flush this to the queue, and 347 ** then restart from scratch in the child. 348 */ 349 350 /* save id for future use */ 351 id = e->e_id; 352 353 /* now drop the envelope in the parent */ 354 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 355 dropenvelope(e); 356 357 /* and reacquire in the child */ 358 (void) dowork(id, TRUE, FALSE, e); 359 360 return; 361 362 # else /* HASFLOCK */ 363 364 pid = fork(); 365 if (pid < 0) 366 { 367 goto queueonly; 368 } 369 else if (pid > 0) 370 { 371 /* be sure we leave the temp files to our child */ 372 /* can't call unlockqueue to avoid unlink of xfp */ 373 if (e->e_lockfp != NULL) 374 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 375 e->e_lockfp = NULL; 376 377 /* close any random open files in the envelope */ 378 closexscript(e); 379 if (e->e_dfp != NULL) 380 (void) xfclose(e->e_dfp, "sendenvelope", e->e_df); 381 e->e_dfp = NULL; 382 e->e_id = e->e_df = NULL; 383 384 /* catch intermediate zombie */ 385 (void) waitfor(pid); 386 return; 387 } 388 389 /* double fork to avoid zombies */ 390 pid = fork(); 391 if (pid > 0) 392 exit(EX_OK); 393 394 /* be sure we are immune from the terminal */ 395 disconnect(1, e); 396 397 /* prevent parent from waiting if there was an error */ 398 if (pid < 0) 399 { 400 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 401 finis(); 402 } 403 404 /* 405 ** Close any cached connections. 406 ** 407 ** We don't send the QUIT protocol because the parent 408 ** still knows about the connection. 409 ** 410 ** This should only happen when delivering an error 411 ** message. 412 */ 413 414 mci_flush(FALSE, NULL); 415 416 # endif /* HASFLOCK */ 417 418 break; 419 } 420 421 /* 422 ** Run through the list and send everything. 423 ** 424 ** Set EF_GLOBALERRS so that error messages during delivery 425 ** result in returned mail. 426 */ 427 428 e->e_nsent = 0; 429 e->e_flags |= EF_GLOBALERRS; 430 431 /* now run through the queue */ 432 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 433 { 434 #ifdef XDEBUG 435 char wbuf[MAXNAME + 20]; 436 437 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 438 checkfd012(wbuf); 439 #endif 440 if (mode == SM_VERIFY) 441 { 442 e->e_to = q->q_paddr; 443 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 444 { 445 if (q->q_host != NULL && q->q_host[0] != '\0') 446 message("deliverable: mailer %s, host %s, user %s", 447 q->q_mailer->m_name, 448 q->q_host, 449 q->q_user); 450 else 451 message("deliverable: mailer %s, user %s", 452 q->q_mailer->m_name, 453 q->q_user); 454 } 455 } 456 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 457 { 458 # ifdef QUEUE 459 /* 460 ** Checkpoint the send list every few addresses 461 */ 462 463 if (e->e_nsent >= CheckpointInterval) 464 { 465 queueup(e, TRUE, FALSE); 466 e->e_nsent = 0; 467 } 468 # endif /* QUEUE */ 469 (void) deliver(e, q); 470 } 471 } 472 Verbose = oldverbose; 473 474 #ifdef XDEBUG 475 checkfd012("end of sendenvelope"); 476 #endif 477 478 if (mode == SM_FORK) 479 finis(); 480 } 481 /* 482 ** DOFORK -- do a fork, retrying a couple of times on failure. 483 ** 484 ** This MUST be a macro, since after a vfork we are running 485 ** two processes on the same stack!!! 486 ** 487 ** Parameters: 488 ** none. 489 ** 490 ** Returns: 491 ** From a macro??? You've got to be kidding! 492 ** 493 ** Side Effects: 494 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 495 ** pid of child in parent, zero in child. 496 ** -1 on unrecoverable error. 497 ** 498 ** Notes: 499 ** I'm awfully sorry this looks so awful. That's 500 ** vfork for you..... 501 */ 502 503 # define NFORKTRIES 5 504 505 # ifndef FORK 506 # define FORK fork 507 # endif 508 509 # define DOFORK(fORKfN) \ 510 {\ 511 register int i;\ 512 \ 513 for (i = NFORKTRIES; --i >= 0; )\ 514 {\ 515 pid = fORKfN();\ 516 if (pid >= 0)\ 517 break;\ 518 if (i > 0)\ 519 sleep((unsigned) NFORKTRIES - i);\ 520 }\ 521 } 522 /* 523 ** DOFORK -- simple fork interface to DOFORK. 524 ** 525 ** Parameters: 526 ** none. 527 ** 528 ** Returns: 529 ** pid of child in parent. 530 ** zero in child. 531 ** -1 on error. 532 ** 533 ** Side Effects: 534 ** returns twice, once in parent and once in child. 535 */ 536 537 dofork() 538 { 539 register int pid; 540 541 DOFORK(fork); 542 return (pid); 543 } 544 /* 545 ** DELIVER -- Deliver a message to a list of addresses. 546 ** 547 ** This routine delivers to everyone on the same host as the 548 ** user on the head of the list. It is clever about mailers 549 ** that don't handle multiple users. It is NOT guaranteed 550 ** that it will deliver to all these addresses however -- so 551 ** deliver should be called once for each address on the 552 ** list. 553 ** 554 ** Parameters: 555 ** e -- the envelope to deliver. 556 ** firstto -- head of the address list to deliver to. 557 ** 558 ** Returns: 559 ** zero -- successfully delivered. 560 ** else -- some failure, see ExitStat for more info. 561 ** 562 ** Side Effects: 563 ** The standard input is passed off to someone. 564 */ 565 566 deliver(e, firstto) 567 register ENVELOPE *e; 568 ADDRESS *firstto; 569 { 570 char *host; /* host being sent to */ 571 char *user; /* user being sent to */ 572 char **pvp; 573 register char **mvp; 574 register char *p; 575 register MAILER *m; /* mailer for this recipient */ 576 ADDRESS *ctladdr; 577 register MCI *mci; 578 register ADDRESS *to = firstto; 579 bool clever = FALSE; /* running user smtp to this mailer */ 580 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 581 int rcode; /* response code */ 582 char *firstsig; /* signature of firstto */ 583 int pid; 584 char *curhost; 585 int mpvect[2]; 586 int rpvect[2]; 587 char *pv[MAXPV+1]; 588 char tobuf[TOBUFSIZE]; /* text line of to people */ 589 char buf[MAXNAME]; 590 char rpathbuf[MAXNAME]; /* translated return path */ 591 extern int checkcompat(); 592 593 errno = 0; 594 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 595 return (0); 596 597 #if NAMED_BIND 598 /* unless interactive, try twice, over a minute */ 599 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) 600 { 601 _res.retrans = 30; 602 _res.retry = 2; 603 } 604 #endif 605 606 m = to->q_mailer; 607 host = to->q_host; 608 CurEnv = e; /* just in case */ 609 e->e_statmsg = NULL; 610 SmtpError[0] = '\0'; 611 612 if (tTd(10, 1)) 613 printf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n", 614 e->e_id, m->m_name, host, to->q_user); 615 if (tTd(10, 100)) 616 printopenfds(FALSE); 617 618 /* 619 ** If this mailer is expensive, and if we don't want to make 620 ** connections now, just mark these addresses and return. 621 ** This is useful if we want to batch connections to 622 ** reduce load. This will cause the messages to be 623 ** queued up, and a daemon will come along to send the 624 ** messages later. 625 ** This should be on a per-mailer basis. 626 */ 627 628 if (NoConnect && bitnset(M_EXPENSIVE, m->m_flags) && !Verbose) 629 { 630 for (; to != NULL; to = to->q_next) 631 { 632 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 633 to->q_mailer != m) 634 continue; 635 to->q_flags |= QQUEUEUP; 636 e->e_to = to->q_paddr; 637 message("queued"); 638 if (LogLevel > 8) 639 logdelivery(m, NULL, "queued", NULL, e); 640 } 641 e->e_to = NULL; 642 return (0); 643 } 644 645 /* 646 ** Do initial argv setup. 647 ** Insert the mailer name. Notice that $x expansion is 648 ** NOT done on the mailer name. Then, if the mailer has 649 ** a picky -f flag, we insert it as appropriate. This 650 ** code does not check for 'pv' overflow; this places a 651 ** manifest lower limit of 4 for MAXPV. 652 ** The from address rewrite is expected to make 653 ** the address relative to the other end. 654 */ 655 656 /* rewrite from address, using rewriting rules */ 657 rcode = EX_OK; 658 (void) strcpy(rpathbuf, remotename(e->e_from.q_paddr, m, 659 RF_SENDERADDR|RF_CANONICAL, 660 &rcode, e)); 661 define('g', rpathbuf, e); /* translated return path */ 662 define('h', host, e); /* to host */ 663 Errors = 0; 664 pvp = pv; 665 *pvp++ = m->m_argv[0]; 666 667 /* insert -f or -r flag as appropriate */ 668 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 669 { 670 if (bitnset(M_FOPT, m->m_flags)) 671 *pvp++ = "-f"; 672 else 673 *pvp++ = "-r"; 674 *pvp++ = newstr(rpathbuf); 675 } 676 677 /* 678 ** Append the other fixed parts of the argv. These run 679 ** up to the first entry containing "$u". There can only 680 ** be one of these, and there are only a few more slots 681 ** in the pv after it. 682 */ 683 684 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 685 { 686 /* can't use strchr here because of sign extension problems */ 687 while (*p != '\0') 688 { 689 if ((*p++ & 0377) == MACROEXPAND) 690 { 691 if (*p == 'u') 692 break; 693 } 694 } 695 696 if (*p != '\0') 697 break; 698 699 /* this entry is safe -- go ahead and process it */ 700 expand(*mvp, buf, &buf[sizeof buf - 1], e); 701 *pvp++ = newstr(buf); 702 if (pvp >= &pv[MAXPV - 3]) 703 { 704 syserr("554 Too many parameters to %s before $u", pv[0]); 705 return (-1); 706 } 707 } 708 709 /* 710 ** If we have no substitution for the user name in the argument 711 ** list, we know that we must supply the names otherwise -- and 712 ** SMTP is the answer!! 713 */ 714 715 if (*mvp == NULL) 716 { 717 /* running SMTP */ 718 # ifdef SMTP 719 clever = TRUE; 720 *pvp = NULL; 721 # else /* SMTP */ 722 /* oops! we don't implement SMTP */ 723 syserr("554 SMTP style mailer not implemented"); 724 return (EX_SOFTWARE); 725 # endif /* SMTP */ 726 } 727 728 /* 729 ** At this point *mvp points to the argument with $u. We 730 ** run through our address list and append all the addresses 731 ** we can. If we run out of space, do not fret! We can 732 ** always send another copy later. 733 */ 734 735 tobuf[0] = '\0'; 736 e->e_to = tobuf; 737 ctladdr = NULL; 738 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 739 for (; to != NULL; to = to->q_next) 740 { 741 /* avoid sending multiple recipients to dumb mailers */ 742 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 743 break; 744 745 /* if already sent or not for this host, don't send */ 746 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 747 to->q_mailer != firstto->q_mailer || 748 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 749 continue; 750 751 /* avoid overflowing tobuf */ 752 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 753 break; 754 755 if (tTd(10, 1)) 756 { 757 printf("\nsend to "); 758 printaddr(to, FALSE); 759 } 760 761 /* compute effective uid/gid when sending */ 762 /* XXX perhaps this should be to->q_mailer != LocalMailer ?? */ 763 /* XXX perhaps it should be a mailer flag? */ 764 if (to->q_mailer == ProgMailer || to->q_mailer == FileMailer) 765 ctladdr = getctladdr(to); 766 767 user = to->q_user; 768 e->e_to = to->q_paddr; 769 if (tTd(10, 5)) 770 { 771 printf("deliver: QDONTSEND "); 772 printaddr(to, FALSE); 773 } 774 to->q_flags |= QDONTSEND; 775 776 /* 777 ** Check to see that these people are allowed to 778 ** talk to each other. 779 */ 780 781 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 782 { 783 NoReturn = TRUE; 784 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 785 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, e); 786 continue; 787 } 788 rcode = checkcompat(to, e); 789 if (rcode != EX_OK) 790 { 791 markfailure(e, to, rcode); 792 giveresponse(rcode, m, NULL, ctladdr, e); 793 continue; 794 } 795 796 /* 797 ** Strip quote bits from names if the mailer is dumb 798 ** about them. 799 */ 800 801 if (bitnset(M_STRIPQ, m->m_flags)) 802 { 803 stripquotes(user); 804 stripquotes(host); 805 } 806 807 /* hack attack -- delivermail compatibility */ 808 if (m == ProgMailer && *user == '|') 809 user++; 810 811 /* 812 ** If an error message has already been given, don't 813 ** bother to send to this address. 814 ** 815 ** >>>>>>>>>> This clause assumes that the local mailer 816 ** >> NOTE >> cannot do any further aliasing; that 817 ** >>>>>>>>>> function is subsumed by sendmail. 818 */ 819 820 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 821 continue; 822 823 /* save statistics.... */ 824 markstats(e, to); 825 826 /* 827 ** See if this user name is "special". 828 ** If the user name has a slash in it, assume that this 829 ** is a file -- send it off without further ado. Note 830 ** that this type of addresses is not processed along 831 ** with the others, so we fudge on the To person. 832 */ 833 834 if (m == FileMailer) 835 { 836 rcode = mailfile(user, ctladdr, e); 837 giveresponse(rcode, m, NULL, ctladdr, e); 838 if (rcode == EX_OK) 839 to->q_flags |= QSENT; 840 continue; 841 } 842 843 /* 844 ** Address is verified -- add this user to mailer 845 ** argv, and add it to the print list of recipients. 846 */ 847 848 /* link together the chain of recipients */ 849 to->q_tchain = tochain; 850 tochain = to; 851 852 /* create list of users for error messages */ 853 (void) strcat(tobuf, ","); 854 (void) strcat(tobuf, to->q_paddr); 855 define('u', user, e); /* to user */ 856 p = to->q_home; 857 if (p == NULL && ctladdr != NULL) 858 p = ctladdr->q_home; 859 define('z', p, e); /* user's home */ 860 861 /* 862 ** Expand out this user into argument list. 863 */ 864 865 if (!clever) 866 { 867 expand(*mvp, buf, &buf[sizeof buf - 1], e); 868 *pvp++ = newstr(buf); 869 if (pvp >= &pv[MAXPV - 2]) 870 { 871 /* allow some space for trailing parms */ 872 break; 873 } 874 } 875 } 876 877 /* see if any addresses still exist */ 878 if (tobuf[0] == '\0') 879 { 880 define('g', (char *) NULL, e); 881 return (0); 882 } 883 884 /* print out messages as full list */ 885 e->e_to = tobuf + 1; 886 887 /* 888 ** Fill out any parameters after the $u parameter. 889 */ 890 891 while (!clever && *++mvp != NULL) 892 { 893 expand(*mvp, buf, &buf[sizeof buf - 1], e); 894 *pvp++ = newstr(buf); 895 if (pvp >= &pv[MAXPV]) 896 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 897 } 898 *pvp++ = NULL; 899 900 /* 901 ** Call the mailer. 902 ** The argument vector gets built, pipes 903 ** are created as necessary, and we fork & exec as 904 ** appropriate. 905 ** If we are running SMTP, we just need to clean up. 906 */ 907 908 /*XXX this seems a bit wierd */ 909 if (ctladdr == NULL && m != ProgMailer && 910 bitset(QGOODUID, e->e_from.q_flags)) 911 ctladdr = &e->e_from; 912 913 #if NAMED_BIND 914 if (ConfigLevel < 2) 915 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 916 #endif 917 918 if (tTd(11, 1)) 919 { 920 printf("openmailer:"); 921 printav(pv); 922 } 923 errno = 0; 924 925 CurHostName = m->m_mailer; 926 927 /* 928 ** Deal with the special case of mail handled through an IPC 929 ** connection. 930 ** In this case we don't actually fork. We must be 931 ** running SMTP for this to work. We will return a 932 ** zero pid to indicate that we are running IPC. 933 ** We also handle a debug version that just talks to stdin/out. 934 */ 935 936 curhost = NULL; 937 SmtpPhase = NULL; 938 mci = NULL; 939 940 #ifdef XDEBUG 941 { 942 char wbuf[MAXLINE]; 943 944 /* make absolutely certain 0, 1, and 2 are in use */ 945 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 946 checkfd012(wbuf); 947 } 948 #endif 949 950 /* check for Local Person Communication -- not for mortals!!! */ 951 if (strcmp(m->m_mailer, "[LPC]") == 0) 952 { 953 mci = (MCI *) xalloc(sizeof *mci); 954 bzero((char *) mci, sizeof *mci); 955 mci->mci_in = stdin; 956 mci->mci_out = stdout; 957 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 958 mci->mci_mailer = m; 959 } 960 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 961 strcmp(m->m_mailer, "[TCP]") == 0) 962 { 963 #ifdef DAEMON 964 register int i; 965 register u_short port; 966 967 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 968 { 969 syserr("null host name for %s mailer", m->m_mailer); 970 rcode = EX_CONFIG; 971 goto give_up; 972 } 973 974 CurHostName = pv[1]; 975 curhost = hostsignature(m, pv[1], e); 976 977 if (curhost == NULL || curhost[0] == '\0') 978 { 979 syserr("null host signature for %s", pv[1]); 980 rcode = EX_OSERR; 981 goto give_up; 982 } 983 984 if (!clever) 985 { 986 syserr("554 non-clever IPC"); 987 rcode = EX_CONFIG; 988 goto give_up; 989 } 990 if (pv[2] != NULL) 991 port = atoi(pv[2]); 992 else 993 port = 0; 994 tryhost: 995 while (*curhost != '\0') 996 { 997 register char *p; 998 static char hostbuf[MAXNAME]; 999 1000 /* pull the next host from the signature */ 1001 p = strchr(curhost, ':'); 1002 if (p == NULL) 1003 p = &curhost[strlen(curhost)]; 1004 if (p == curhost) 1005 { 1006 syserr("deliver: null host name in signature"); 1007 curhost++; 1008 continue; 1009 } 1010 strncpy(hostbuf, curhost, p - curhost); 1011 hostbuf[p - curhost] = '\0'; 1012 if (*p != '\0') 1013 p++; 1014 curhost = p; 1015 1016 /* see if we already know that this host is fried */ 1017 CurHostName = hostbuf; 1018 mci = mci_get(hostbuf, m); 1019 if (mci->mci_state != MCIS_CLOSED) 1020 { 1021 if (tTd(11, 1)) 1022 { 1023 printf("openmailer: "); 1024 mci_dump(mci, FALSE); 1025 } 1026 CurHostName = mci->mci_host; 1027 break; 1028 } 1029 mci->mci_mailer = m; 1030 if (mci->mci_exitstat != EX_OK) 1031 continue; 1032 1033 /* try the connection */ 1034 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1035 message("Connecting to %s (%s)...", 1036 hostbuf, m->m_name); 1037 i = makeconnection(hostbuf, port, mci, 1038 bitnset(M_SECURE_PORT, m->m_flags)); 1039 mci->mci_exitstat = i; 1040 mci->mci_errno = errno; 1041 #if NAMED_BIND 1042 mci->mci_herrno = h_errno; 1043 #endif 1044 if (i == EX_OK) 1045 { 1046 mci->mci_state = MCIS_OPENING; 1047 mci_cache(mci); 1048 if (TrafficLogFile != NULL) 1049 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1050 getpid(), hostbuf); 1051 break; 1052 } 1053 else if (tTd(11, 1)) 1054 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1055 i, errno); 1056 1057 /* enter status of this host */ 1058 setstat(i); 1059 1060 /* should print some message here for -v mode */ 1061 } 1062 if (mci == NULL) 1063 { 1064 syserr("deliver: no host name"); 1065 rcode = EX_OSERR; 1066 goto give_up; 1067 } 1068 mci->mci_pid = 0; 1069 #else /* no DAEMON */ 1070 syserr("554 openmailer: no IPC"); 1071 if (tTd(11, 1)) 1072 printf("openmailer: NULL\n"); 1073 rcode = EX_UNAVAILABLE; 1074 goto give_up; 1075 #endif /* DAEMON */ 1076 } 1077 else 1078 { 1079 if (TrafficLogFile != NULL) 1080 { 1081 char **av; 1082 1083 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1084 for (av = pv; *av != NULL; av++) 1085 fprintf(TrafficLogFile, " %s", *av); 1086 fprintf(TrafficLogFile, "\n"); 1087 } 1088 1089 /* create a pipe to shove the mail through */ 1090 if (pipe(mpvect) < 0) 1091 { 1092 syserr("%s... openmailer(%s): pipe (to mailer)", 1093 e->e_to, m->m_name); 1094 if (tTd(11, 1)) 1095 printf("openmailer: NULL\n"); 1096 rcode = EX_OSERR; 1097 goto give_up; 1098 } 1099 1100 /* if this mailer speaks smtp, create a return pipe */ 1101 if (clever && pipe(rpvect) < 0) 1102 { 1103 syserr("%s... openmailer(%s): pipe (from mailer)", 1104 e->e_to, m->m_name); 1105 (void) close(mpvect[0]); 1106 (void) close(mpvect[1]); 1107 if (tTd(11, 1)) 1108 printf("openmailer: NULL\n"); 1109 rcode = EX_OSERR; 1110 goto give_up; 1111 } 1112 1113 /* 1114 ** Actually fork the mailer process. 1115 ** DOFORK is clever about retrying. 1116 ** 1117 ** Dispose of SIGCHLD signal catchers that may be laying 1118 ** around so that endmail will get it. 1119 */ 1120 1121 if (e->e_xfp != NULL) 1122 (void) fflush(e->e_xfp); /* for debugging */ 1123 (void) fflush(stdout); 1124 # ifdef SIGCHLD 1125 (void) setsignal(SIGCHLD, SIG_DFL); 1126 # endif /* SIGCHLD */ 1127 DOFORK(FORK); 1128 /* pid is set by DOFORK */ 1129 if (pid < 0) 1130 { 1131 /* failure */ 1132 syserr("%s... openmailer(%s): cannot fork", 1133 e->e_to, m->m_name); 1134 (void) close(mpvect[0]); 1135 (void) close(mpvect[1]); 1136 if (clever) 1137 { 1138 (void) close(rpvect[0]); 1139 (void) close(rpvect[1]); 1140 } 1141 if (tTd(11, 1)) 1142 printf("openmailer: NULL\n"); 1143 rcode = EX_OSERR; 1144 goto give_up; 1145 } 1146 else if (pid == 0) 1147 { 1148 int i; 1149 int saveerrno; 1150 char **ep; 1151 char *env[MAXUSERENVIRON]; 1152 extern char **environ; 1153 extern int DtableSize; 1154 1155 /* child -- set up input & exec mailer */ 1156 (void) setsignal(SIGINT, SIG_IGN); 1157 (void) setsignal(SIGHUP, SIG_IGN); 1158 (void) setsignal(SIGTERM, SIG_DFL); 1159 1160 /* reset user and group */ 1161 if (!bitnset(M_RESTR, m->m_flags)) 1162 { 1163 if (ctladdr == NULL || ctladdr->q_uid == 0) 1164 { 1165 (void) initgroups(DefUser, DefGid); 1166 (void) setgid(DefGid); 1167 (void) setuid(DefUid); 1168 } 1169 else 1170 { 1171 (void) initgroups(ctladdr->q_ruser? 1172 ctladdr->q_ruser: ctladdr->q_user, 1173 ctladdr->q_gid); 1174 (void) setgid(ctladdr->q_gid); 1175 (void) setuid(ctladdr->q_uid); 1176 } 1177 } 1178 1179 if (tTd(11, 2)) 1180 printf("openmailer: running as r/euid=%d/%d\n", 1181 getuid(), geteuid()); 1182 1183 /* move into some "safe" directory */ 1184 if (m->m_execdir != NULL) 1185 { 1186 char *p, *q; 1187 char buf[MAXLINE]; 1188 1189 for (p = m->m_execdir; p != NULL; p = q) 1190 { 1191 q = strchr(p, ':'); 1192 if (q != NULL) 1193 *q = '\0'; 1194 expand(p, buf, &buf[sizeof buf] - 1, e); 1195 if (q != NULL) 1196 *q++ = ':'; 1197 if (tTd(11, 20)) 1198 printf("openmailer: trydir %s\n", 1199 buf); 1200 if (buf[0] != '\0' && chdir(buf) >= 0) 1201 break; 1202 } 1203 } 1204 1205 /* arrange to filter std & diag output of command */ 1206 if (clever) 1207 { 1208 (void) close(rpvect[0]); 1209 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1210 { 1211 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1212 e->e_to, m->m_name, rpvect[1]); 1213 _exit(EX_OSERR); 1214 } 1215 (void) close(rpvect[1]); 1216 } 1217 else if (OpMode == MD_SMTP || OpMode == MD_DAEMON || 1218 HoldErrs || DisConnected) 1219 { 1220 /* put mailer output in transcript */ 1221 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1222 { 1223 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1224 e->e_to, m->m_name, 1225 fileno(e->e_xfp)); 1226 _exit(EX_OSERR); 1227 } 1228 } 1229 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1230 { 1231 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1232 e->e_to, m->m_name); 1233 _exit(EX_OSERR); 1234 } 1235 1236 /* arrange to get standard input */ 1237 (void) close(mpvect[1]); 1238 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1239 { 1240 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1241 e->e_to, m->m_name, mpvect[0]); 1242 _exit(EX_OSERR); 1243 } 1244 (void) close(mpvect[0]); 1245 1246 /* arrange for all the files to be closed */ 1247 for (i = 3; i < DtableSize; i++) 1248 { 1249 register int j; 1250 1251 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1252 (void) fcntl(i, F_SETFD, j | 1); 1253 } 1254 1255 /* 1256 ** Set up the mailer environment 1257 ** TZ is timezone information. 1258 ** SYSTYPE is Apollo software sys type (required). 1259 ** ISP is Apollo hardware system type (required). 1260 */ 1261 1262 i = 0; 1263 env[i++] = "AGENT=sendmail"; 1264 for (ep = environ; *ep != NULL; ep++) 1265 { 1266 if (strncmp(*ep, "TZ=", 3) == 0 || 1267 strncmp(*ep, "ISP=", 4) == 0 || 1268 strncmp(*ep, "SYSTYPE=", 8) == 0) 1269 env[i++] = *ep; 1270 } 1271 env[i++] = NULL; 1272 1273 /* try to execute the mailer */ 1274 execve(m->m_mailer, pv, env); 1275 saveerrno = errno; 1276 syserr("Cannot exec %s", m->m_mailer); 1277 if (m == LocalMailer || transienterror(saveerrno)) 1278 _exit(EX_OSERR); 1279 _exit(EX_UNAVAILABLE); 1280 } 1281 1282 /* 1283 ** Set up return value. 1284 */ 1285 1286 mci = (MCI *) xalloc(sizeof *mci); 1287 bzero((char *) mci, sizeof *mci); 1288 mci->mci_mailer = m; 1289 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1290 mci->mci_pid = pid; 1291 (void) close(mpvect[0]); 1292 mci->mci_out = fdopen(mpvect[1], "w"); 1293 if (mci->mci_out == NULL) 1294 { 1295 syserr("deliver: cannot create mailer output channel, fd=%d", 1296 mpvect[1]); 1297 (void) close(mpvect[1]); 1298 if (clever) 1299 { 1300 (void) close(rpvect[0]); 1301 (void) close(rpvect[1]); 1302 } 1303 rcode = EX_OSERR; 1304 goto give_up; 1305 } 1306 if (clever) 1307 { 1308 (void) close(rpvect[1]); 1309 mci->mci_in = fdopen(rpvect[0], "r"); 1310 if (mci->mci_in == NULL) 1311 { 1312 syserr("deliver: cannot create mailer input channel, fd=%d", 1313 mpvect[1]); 1314 (void) close(rpvect[0]); 1315 fclose(mci->mci_out); 1316 mci->mci_out = NULL; 1317 rcode = EX_OSERR; 1318 goto give_up; 1319 } 1320 } 1321 else 1322 { 1323 mci->mci_flags |= MCIF_TEMP; 1324 mci->mci_in = NULL; 1325 } 1326 } 1327 1328 /* 1329 ** If we are in SMTP opening state, send initial protocol. 1330 */ 1331 1332 if (clever && mci->mci_state != MCIS_CLOSED) 1333 { 1334 smtpinit(m, mci, e); 1335 } 1336 if (tTd(11, 1)) 1337 { 1338 printf("openmailer: "); 1339 mci_dump(mci, FALSE); 1340 } 1341 1342 if (mci->mci_state != MCIS_OPEN) 1343 { 1344 /* couldn't open the mailer */ 1345 rcode = mci->mci_exitstat; 1346 errno = mci->mci_errno; 1347 #if NAMED_BIND 1348 h_errno = mci->mci_herrno; 1349 #endif 1350 if (rcode == EX_OK) 1351 { 1352 /* shouldn't happen */ 1353 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1354 rcode, mci->mci_state, firstsig); 1355 rcode = EX_SOFTWARE; 1356 } 1357 else if (rcode == EX_TEMPFAIL && curhost != NULL && *curhost != '\0') 1358 { 1359 /* try next MX site */ 1360 goto tryhost; 1361 } 1362 } 1363 else if (!clever) 1364 { 1365 /* 1366 ** Format and send message. 1367 */ 1368 1369 putfromline(mci, e); 1370 (*e->e_puthdr)(mci, e); 1371 putline("\n", mci); 1372 (*e->e_putbody)(mci, e, NULL); 1373 1374 /* get the exit status */ 1375 rcode = endmailer(mci, e, pv); 1376 } 1377 else 1378 #ifdef SMTP 1379 { 1380 /* 1381 ** Send the MAIL FROM: protocol 1382 */ 1383 1384 rcode = smtpmailfrom(m, mci, e); 1385 if (rcode == EX_OK) 1386 { 1387 register char *t = tobuf; 1388 register int i; 1389 1390 /* send the recipient list */ 1391 tobuf[0] = '\0'; 1392 for (to = tochain; to != NULL; to = to->q_tchain) 1393 { 1394 e->e_to = to->q_paddr; 1395 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1396 { 1397 markfailure(e, to, i); 1398 giveresponse(i, m, mci, ctladdr, e); 1399 } 1400 else 1401 { 1402 *t++ = ','; 1403 for (p = to->q_paddr; *p; *t++ = *p++) 1404 continue; 1405 *t = '\0'; 1406 } 1407 } 1408 1409 /* now send the data */ 1410 if (tobuf[0] == '\0') 1411 { 1412 rcode = EX_OK; 1413 e->e_to = NULL; 1414 if (bitset(MCIF_CACHED, mci->mci_flags)) 1415 smtprset(m, mci, e); 1416 } 1417 else 1418 { 1419 e->e_to = tobuf + 1; 1420 rcode = smtpdata(m, mci, e); 1421 } 1422 1423 /* now close the connection */ 1424 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1425 smtpquit(m, mci, e); 1426 } 1427 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1428 { 1429 /* try next MX site */ 1430 goto tryhost; 1431 } 1432 } 1433 #else /* not SMTP */ 1434 { 1435 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1436 rcode = EX_CONFIG; 1437 goto give_up; 1438 } 1439 #endif /* SMTP */ 1440 #if NAMED_BIND 1441 if (ConfigLevel < 2) 1442 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1443 #endif 1444 1445 /* arrange a return receipt if requested */ 1446 if (rcode == EX_OK && e->e_receiptto != NULL && 1447 bitnset(M_LOCALMAILER, m->m_flags)) 1448 { 1449 e->e_flags |= EF_SENDRECEIPT; 1450 /* do we want to send back more info? */ 1451 } 1452 1453 /* 1454 ** Do final status disposal. 1455 ** We check for something in tobuf for the SMTP case. 1456 ** If we got a temporary failure, arrange to queue the 1457 ** addressees. 1458 */ 1459 1460 give_up: 1461 if (tobuf[0] != '\0') 1462 giveresponse(rcode, m, mci, ctladdr, e); 1463 for (to = tochain; to != NULL; to = to->q_tchain) 1464 { 1465 if (rcode != EX_OK) 1466 markfailure(e, to, rcode); 1467 else 1468 { 1469 to->q_flags |= QSENT; 1470 e->e_nsent++; 1471 if (e->e_receiptto != NULL && 1472 bitnset(M_LOCALMAILER, m->m_flags)) 1473 { 1474 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1475 to->q_paddr); 1476 } 1477 } 1478 } 1479 1480 /* 1481 ** Restore state and return. 1482 */ 1483 1484 #ifdef XDEBUG 1485 { 1486 char wbuf[MAXLINE]; 1487 1488 /* make absolutely certain 0, 1, and 2 are in use */ 1489 sprintf(wbuf, "%s... end of deliver(%s)", 1490 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1491 m->m_name); 1492 checkfd012(wbuf); 1493 } 1494 #endif 1495 1496 errno = 0; 1497 define('g', (char *) NULL, e); 1498 return (rcode); 1499 } 1500 /* 1501 ** MARKFAILURE -- mark a failure on a specific address. 1502 ** 1503 ** Parameters: 1504 ** e -- the envelope we are sending. 1505 ** q -- the address to mark. 1506 ** rcode -- the code signifying the particular failure. 1507 ** 1508 ** Returns: 1509 ** none. 1510 ** 1511 ** Side Effects: 1512 ** marks the address (and possibly the envelope) with the 1513 ** failure so that an error will be returned or 1514 ** the message will be queued, as appropriate. 1515 */ 1516 1517 markfailure(e, q, rcode) 1518 register ENVELOPE *e; 1519 register ADDRESS *q; 1520 int rcode; 1521 { 1522 char buf[MAXLINE]; 1523 1524 switch (rcode) 1525 { 1526 case EX_OK: 1527 break; 1528 1529 case EX_TEMPFAIL: 1530 case EX_IOERR: 1531 case EX_OSERR: 1532 q->q_flags |= QQUEUEUP; 1533 break; 1534 1535 default: 1536 q->q_flags |= QBADADDR; 1537 break; 1538 } 1539 } 1540 /* 1541 ** ENDMAILER -- Wait for mailer to terminate. 1542 ** 1543 ** We should never get fatal errors (e.g., segmentation 1544 ** violation), so we report those specially. For other 1545 ** errors, we choose a status message (into statmsg), 1546 ** and if it represents an error, we print it. 1547 ** 1548 ** Parameters: 1549 ** pid -- pid of mailer. 1550 ** e -- the current envelope. 1551 ** pv -- the parameter vector that invoked the mailer 1552 ** (for error messages). 1553 ** 1554 ** Returns: 1555 ** exit code of mailer. 1556 ** 1557 ** Side Effects: 1558 ** none. 1559 */ 1560 1561 endmailer(mci, e, pv) 1562 register MCI *mci; 1563 register ENVELOPE *e; 1564 char **pv; 1565 { 1566 int st; 1567 1568 /* close any connections */ 1569 if (mci->mci_in != NULL) 1570 (void) xfclose(mci->mci_in, mci->mci_mailer->m_name, "mci_in"); 1571 if (mci->mci_out != NULL) 1572 (void) xfclose(mci->mci_out, mci->mci_mailer->m_name, "mci_out"); 1573 mci->mci_in = mci->mci_out = NULL; 1574 mci->mci_state = MCIS_CLOSED; 1575 1576 /* in the IPC case there is nothing to wait for */ 1577 if (mci->mci_pid == 0) 1578 return (EX_OK); 1579 1580 /* wait for the mailer process to die and collect status */ 1581 st = waitfor(mci->mci_pid); 1582 if (st == -1) 1583 { 1584 syserr("endmailer %s: wait", pv[0]); 1585 return (EX_SOFTWARE); 1586 } 1587 1588 if (WIFEXITED(st)) 1589 { 1590 /* normal death -- return status */ 1591 return (WEXITSTATUS(st)); 1592 } 1593 1594 /* it died a horrid death */ 1595 syserr("451 mailer %s died with signal %o", 1596 mci->mci_mailer->m_name, st); 1597 1598 /* log the arguments */ 1599 if (pv != NULL && e->e_xfp != NULL) 1600 { 1601 register char **av; 1602 1603 fprintf(e->e_xfp, "Arguments:"); 1604 for (av = pv; *av != NULL; av++) 1605 fprintf(e->e_xfp, " %s", *av); 1606 fprintf(e->e_xfp, "\n"); 1607 } 1608 1609 ExitStat = EX_TEMPFAIL; 1610 return (EX_TEMPFAIL); 1611 } 1612 /* 1613 ** GIVERESPONSE -- Interpret an error response from a mailer 1614 ** 1615 ** Parameters: 1616 ** stat -- the status code from the mailer (high byte 1617 ** only; core dumps must have been taken care of 1618 ** already). 1619 ** m -- the mailer info for this mailer. 1620 ** mci -- the mailer connection info -- can be NULL if the 1621 ** response is given before the connection is made. 1622 ** ctladdr -- the controlling address for the recipient 1623 ** address(es). 1624 ** e -- the current envelope. 1625 ** 1626 ** Returns: 1627 ** none. 1628 ** 1629 ** Side Effects: 1630 ** Errors may be incremented. 1631 ** ExitStat may be set. 1632 */ 1633 1634 giveresponse(stat, m, mci, ctladdr, e) 1635 int stat; 1636 register MAILER *m; 1637 register MCI *mci; 1638 ADDRESS *ctladdr; 1639 ENVELOPE *e; 1640 { 1641 register const char *statmsg; 1642 extern char *SysExMsg[]; 1643 register int i; 1644 extern int N_SysEx; 1645 char buf[MAXLINE]; 1646 1647 /* 1648 ** Compute status message from code. 1649 */ 1650 1651 i = stat - EX__BASE; 1652 if (stat == 0) 1653 { 1654 statmsg = "250 Sent"; 1655 if (e->e_statmsg != NULL) 1656 { 1657 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1658 statmsg = buf; 1659 } 1660 } 1661 else if (i < 0 || i > N_SysEx) 1662 { 1663 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1664 stat = EX_UNAVAILABLE; 1665 statmsg = buf; 1666 } 1667 else if (stat == EX_TEMPFAIL) 1668 { 1669 (void) strcpy(buf, SysExMsg[i] + 1); 1670 #if NAMED_BIND 1671 if (h_errno == TRY_AGAIN) 1672 statmsg = errstring(h_errno+E_DNSBASE); 1673 else 1674 #endif 1675 { 1676 if (errno != 0) 1677 statmsg = errstring(errno); 1678 else 1679 { 1680 #ifdef SMTP 1681 statmsg = SmtpError; 1682 #else /* SMTP */ 1683 statmsg = NULL; 1684 #endif /* SMTP */ 1685 } 1686 } 1687 if (statmsg != NULL && statmsg[0] != '\0') 1688 { 1689 (void) strcat(buf, ": "); 1690 (void) strcat(buf, statmsg); 1691 } 1692 statmsg = buf; 1693 } 1694 #if NAMED_BIND 1695 else if (stat == EX_NOHOST && h_errno != 0) 1696 { 1697 statmsg = errstring(h_errno + E_DNSBASE); 1698 (void) sprintf(buf, "%s (%s)", SysExMsg[i], statmsg); 1699 statmsg = buf; 1700 } 1701 #endif 1702 else 1703 { 1704 statmsg = SysExMsg[i]; 1705 if (*statmsg++ == ':') 1706 { 1707 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1708 statmsg = buf; 1709 } 1710 } 1711 1712 /* 1713 ** Print the message as appropriate 1714 */ 1715 1716 if (stat == EX_OK || stat == EX_TEMPFAIL) 1717 { 1718 extern char MsgBuf[]; 1719 1720 message("%s", &statmsg[4]); 1721 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1722 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1723 } 1724 else 1725 { 1726 Errors++; 1727 usrerr(statmsg, errstring(errno)); 1728 } 1729 1730 /* 1731 ** Final cleanup. 1732 ** Log a record of the transaction. Compute the new 1733 ** ExitStat -- if we already had an error, stick with 1734 ** that. 1735 */ 1736 1737 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1738 logdelivery(m, mci, &statmsg[4], ctladdr, e); 1739 1740 if (tTd(11, 2)) 1741 printf("giveresponse: stat=%d, e->e_message=%s\n", 1742 stat, e->e_message); 1743 1744 if (stat != EX_TEMPFAIL) 1745 setstat(stat); 1746 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1747 { 1748 if (e->e_message != NULL) 1749 free(e->e_message); 1750 e->e_message = newstr(&statmsg[4]); 1751 } 1752 errno = 0; 1753 #if NAMED_BIND 1754 h_errno = 0; 1755 #endif 1756 } 1757 /* 1758 ** LOGDELIVERY -- log the delivery in the system log 1759 ** 1760 ** Care is taken to avoid logging lines that are too long, because 1761 ** some versions of syslog have an unfortunate proclivity for core 1762 ** dumping. This is a hack, to be sure, that is at best empirical. 1763 ** 1764 ** Parameters: 1765 ** m -- the mailer info. Can be NULL for initial queue. 1766 ** mci -- the mailer connection info -- can be NULL if the 1767 ** log is occuring when no connection is active. 1768 ** stat -- the message to print for the status. 1769 ** ctladdr -- the controlling address for the to list. 1770 ** e -- the current envelope. 1771 ** 1772 ** Returns: 1773 ** none 1774 ** 1775 ** Side Effects: 1776 ** none 1777 */ 1778 1779 logdelivery(m, mci, stat, ctladdr, e) 1780 MAILER *m; 1781 register MCI *mci; 1782 char *stat; 1783 ADDRESS *ctladdr; 1784 register ENVELOPE *e; 1785 { 1786 # ifdef LOG 1787 register char *bp; 1788 register char *p; 1789 int l; 1790 char buf[512]; 1791 1792 # if (SYSLOG_BUFSIZE) >= 256 1793 bp = buf; 1794 if (ctladdr != NULL) 1795 { 1796 strcpy(bp, ", ctladdr="); 1797 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 1798 bp += strlen(bp); 1799 if (bitset(QGOODUID, ctladdr->q_flags)) 1800 { 1801 (void) sprintf(bp, " (%d/%d)", 1802 ctladdr->q_uid, ctladdr->q_gid); 1803 bp += strlen(bp); 1804 } 1805 } 1806 1807 (void) sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1808 bp += strlen(bp); 1809 1810 if (m != NULL) 1811 { 1812 (void) strcpy(bp, ", mailer="); 1813 (void) strcat(bp, m->m_name); 1814 bp += strlen(bp); 1815 } 1816 1817 if (mci != NULL && mci->mci_host != NULL) 1818 { 1819 # ifdef DAEMON 1820 extern SOCKADDR CurHostAddr; 1821 # endif 1822 1823 (void) strcpy(bp, ", relay="); 1824 (void) strcat(bp, mci->mci_host); 1825 1826 # ifdef DAEMON 1827 (void) strcat(bp, " ["); 1828 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 1829 (void) strcat(bp, "]"); 1830 # endif 1831 } 1832 else 1833 { 1834 char *p = macvalue('h', e); 1835 1836 if (p != NULL && p[0] != '\0') 1837 { 1838 (void) strcpy(bp, ", relay="); 1839 (void) strcat(bp, p); 1840 } 1841 } 1842 bp += strlen(bp); 1843 1844 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 1845 #if (STATLEN) < 63 1846 # undef STATLEN 1847 # define STATLEN 63 1848 #endif 1849 #if (STATLEN) > 203 1850 # undef STATLEN 1851 # define STATLEN 203 1852 #endif 1853 1854 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 1855 { 1856 /* desperation move -- truncate data */ 1857 bp = buf + sizeof buf - ((STATLEN) + 17); 1858 strcpy(bp, "..."); 1859 bp += 3; 1860 } 1861 1862 (void) strcpy(bp, ", stat="); 1863 bp += strlen(bp); 1864 1865 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 1866 1867 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 1868 p = e->e_to; 1869 while (strlen(p) >= l) 1870 { 1871 register char *q = strchr(p + l, ','); 1872 1873 if (q == NULL) 1874 break; 1875 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 1876 e->e_id, ++q - p, p, buf); 1877 p = q; 1878 } 1879 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 1880 1881 # else /* we have a very short log buffer size */ 1882 1883 l = SYSLOG_BUFSIZE - 85; 1884 p = e->e_to; 1885 while (strlen(p) >= l) 1886 { 1887 register char *q = strchr(p + l, ','); 1888 1889 if (q == NULL) 1890 break; 1891 syslog(LOG_INFO, "%s: to=%.*s [more]", 1892 e->e_id, ++q - p, p); 1893 p = q; 1894 } 1895 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 1896 1897 if (ctladdr != NULL) 1898 { 1899 bp = buf; 1900 strcpy(buf, "ctladdr="); 1901 bp += strlen(buf); 1902 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 1903 bp += strlen(buf); 1904 if (bitset(QGOODUID, ctladdr->q_flags)) 1905 { 1906 (void) sprintf(bp, " (%d/%d)", 1907 ctladdr->q_uid, ctladdr->q_gid); 1908 bp += strlen(bp); 1909 } 1910 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1911 } 1912 bp = buf; 1913 sprintf(bp, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1914 bp += strlen(bp); 1915 1916 if (m != NULL) 1917 { 1918 sprintf(bp, ", mailer=%s", m->m_name); 1919 bp += strlen(bp); 1920 } 1921 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1922 1923 buf[0] = '\0'; 1924 if (mci != NULL && mci->mci_host != NULL) 1925 { 1926 # ifdef DAEMON 1927 extern SOCKADDR CurHostAddr; 1928 # endif 1929 1930 sprintf(buf, "relay=%s", mci->mci_host); 1931 1932 # ifdef DAEMON 1933 (void) strcat(buf, " ["); 1934 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 1935 (void) strcat(buf, "]"); 1936 # endif 1937 } 1938 else 1939 { 1940 char *p = macvalue('h', e); 1941 1942 if (p != NULL && p[0] != '\0') 1943 sprintf(buf, "relay=%s", p); 1944 } 1945 if (buf[0] != '\0') 1946 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1947 1948 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 1949 # endif /* short log buffer */ 1950 # endif /* LOG */ 1951 } 1952 /* 1953 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1954 ** 1955 ** This can be made an arbitrary message separator by changing $l 1956 ** 1957 ** One of the ugliest hacks seen by human eyes is contained herein: 1958 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1959 ** does a well-meaning programmer such as myself have to deal with 1960 ** this kind of antique garbage???? 1961 ** 1962 ** Parameters: 1963 ** mci -- the connection information. 1964 ** e -- the envelope. 1965 ** 1966 ** Returns: 1967 ** none 1968 ** 1969 ** Side Effects: 1970 ** outputs some text to fp. 1971 */ 1972 1973 putfromline(mci, e) 1974 register MCI *mci; 1975 ENVELOPE *e; 1976 { 1977 char *template = "\201l\n"; 1978 char buf[MAXLINE]; 1979 1980 if (bitnset(M_NHDR, mci->mci_mailer->m_flags)) 1981 return; 1982 1983 # ifdef UGLYUUCP 1984 if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags)) 1985 { 1986 char *bang; 1987 char xbuf[MAXLINE]; 1988 1989 expand("\201g", buf, &buf[sizeof buf - 1], e); 1990 bang = strchr(buf, '!'); 1991 if (bang == NULL) 1992 { 1993 errno = 0; 1994 syserr("554 No ! in UUCP From address! (%s given)", buf); 1995 } 1996 else 1997 { 1998 *bang++ = '\0'; 1999 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 2000 template = xbuf; 2001 } 2002 } 2003 # endif /* UGLYUUCP */ 2004 expand(template, buf, &buf[sizeof buf - 1], e); 2005 putline(buf, mci); 2006 } 2007 /* 2008 ** PUTBODY -- put the body of a message. 2009 ** 2010 ** Parameters: 2011 ** mci -- the connection information. 2012 ** e -- the envelope to put out. 2013 ** separator -- if non-NULL, a message separator that must 2014 ** not be permitted in the resulting message. 2015 ** 2016 ** Returns: 2017 ** none. 2018 ** 2019 ** Side Effects: 2020 ** The message is written onto fp. 2021 */ 2022 2023 putbody(mci, e, separator) 2024 register MCI *mci; 2025 register ENVELOPE *e; 2026 char *separator; 2027 { 2028 char buf[MAXLINE]; 2029 2030 /* 2031 ** Output the body of the message 2032 */ 2033 2034 if (e->e_dfp == NULL) 2035 { 2036 if (e->e_df != NULL) 2037 { 2038 e->e_dfp = fopen(e->e_df, "r"); 2039 if (e->e_dfp == NULL) 2040 syserr("putbody: Cannot open %s for %s from %s", 2041 e->e_df, e->e_to, e->e_from.q_paddr); 2042 } 2043 else 2044 putline("<<< No Message Collected >>>", mci); 2045 } 2046 if (e->e_dfp != NULL) 2047 { 2048 rewind(e->e_dfp); 2049 while (!ferror(mci->mci_out) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 2050 { 2051 if (buf[0] == 'F' && 2052 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) && 2053 strncmp(buf, "From ", 5) == 0) 2054 (void) putc('>', mci->mci_out); 2055 if (buf[0] == '-' && buf[1] == '-' && separator != NULL) 2056 { 2057 /* possible separator */ 2058 int sl = strlen(separator); 2059 2060 if (strncmp(&buf[2], separator, sl) == 0) 2061 (void) putc(' ', mci->mci_out); 2062 } 2063 putline(buf, mci); 2064 } 2065 2066 if (ferror(e->e_dfp)) 2067 { 2068 syserr("putbody: %s: read error", e->e_df); 2069 ExitStat = EX_IOERR; 2070 } 2071 } 2072 2073 /* some mailers want extra blank line at end of message */ 2074 if (bitnset(M_BLANKEND, mci->mci_mailer->m_flags) && 2075 buf[0] != '\0' && buf[0] != '\n') 2076 putline("", mci); 2077 2078 (void) fflush(mci->mci_out); 2079 if (ferror(mci->mci_out) && errno != EPIPE) 2080 { 2081 syserr("putbody: write error"); 2082 ExitStat = EX_IOERR; 2083 } 2084 errno = 0; 2085 } 2086 /* 2087 ** MAILFILE -- Send a message to a file. 2088 ** 2089 ** If the file has the setuid/setgid bits set, but NO execute 2090 ** bits, sendmail will try to become the owner of that file 2091 ** rather than the real user. Obviously, this only works if 2092 ** sendmail runs as root. 2093 ** 2094 ** This could be done as a subordinate mailer, except that it 2095 ** is used implicitly to save messages in ~/dead.letter. We 2096 ** view this as being sufficiently important as to include it 2097 ** here. For example, if the system is dying, we shouldn't have 2098 ** to create another process plus some pipes to save the message. 2099 ** 2100 ** Parameters: 2101 ** filename -- the name of the file to send to. 2102 ** ctladdr -- the controlling address header -- includes 2103 ** the userid/groupid to be when sending. 2104 ** 2105 ** Returns: 2106 ** The exit code associated with the operation. 2107 ** 2108 ** Side Effects: 2109 ** none. 2110 */ 2111 2112 mailfile(filename, ctladdr, e) 2113 char *filename; 2114 ADDRESS *ctladdr; 2115 register ENVELOPE *e; 2116 { 2117 register FILE *f; 2118 register int pid; 2119 int mode; 2120 2121 if (tTd(11, 1)) 2122 { 2123 printf("mailfile %s\n ctladdr=", filename); 2124 printaddr(ctladdr, FALSE); 2125 } 2126 2127 if (e->e_xfp != NULL) 2128 fflush(e->e_xfp); 2129 2130 /* 2131 ** Fork so we can change permissions here. 2132 ** Note that we MUST use fork, not vfork, because of 2133 ** the complications of calling subroutines, etc. 2134 */ 2135 2136 DOFORK(fork); 2137 2138 if (pid < 0) 2139 return (EX_OSERR); 2140 else if (pid == 0) 2141 { 2142 /* child -- actually write to file */ 2143 struct stat stb; 2144 MCI mcibuf; 2145 2146 (void) setsignal(SIGINT, SIG_DFL); 2147 (void) setsignal(SIGHUP, SIG_DFL); 2148 (void) setsignal(SIGTERM, SIG_DFL); 2149 (void) umask(OldUmask); 2150 2151 if (stat(filename, &stb) < 0) 2152 stb.st_mode = FileMode; 2153 mode = stb.st_mode; 2154 2155 /* limit the errors to those actually caused in the child */ 2156 errno = 0; 2157 ExitStat = EX_OK; 2158 2159 if (bitset(0111, stb.st_mode)) 2160 exit(EX_CANTCREAT); 2161 if (ctladdr != NULL) 2162 { 2163 /* ignore setuid and setgid bits */ 2164 mode &= ~(S_ISGID|S_ISUID); 2165 } 2166 2167 /* we have to open the dfile BEFORE setuid */ 2168 if (e->e_dfp == NULL && e->e_df != NULL) 2169 { 2170 e->e_dfp = fopen(e->e_df, "r"); 2171 if (e->e_dfp == NULL) 2172 { 2173 syserr("mailfile: Cannot open %s for %s from %s", 2174 e->e_df, e->e_to, e->e_from.q_paddr); 2175 } 2176 } 2177 2178 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 2179 { 2180 if (ctladdr == NULL || ctladdr->q_uid == 0) 2181 { 2182 (void) initgroups(DefUser, DefGid); 2183 } 2184 else 2185 { 2186 (void) initgroups(ctladdr->q_ruser ? 2187 ctladdr->q_ruser : ctladdr->q_user, 2188 ctladdr->q_gid); 2189 } 2190 } 2191 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 2192 { 2193 if (ctladdr == NULL || ctladdr->q_uid == 0) 2194 (void) setuid(DefUid); 2195 else 2196 (void) setuid(ctladdr->q_uid); 2197 } 2198 FileName = filename; 2199 LineNumber = 0; 2200 f = dfopen(filename, O_WRONLY|O_CREAT|O_APPEND, FileMode); 2201 if (f == NULL) 2202 { 2203 message("554 cannot open: %s", errstring(errno)); 2204 exit(EX_CANTCREAT); 2205 } 2206 2207 bzero(&mcibuf, sizeof mcibuf); 2208 mcibuf.mci_mailer = FileMailer; 2209 mcibuf.mci_out = f; 2210 if (bitnset(M_7BITS, FileMailer->m_flags)) 2211 mcibuf.mci_flags |= MCIF_7BIT; 2212 2213 putfromline(&mcibuf, e); 2214 (*e->e_puthdr)(&mcibuf, e); 2215 putline("\n", &mcibuf); 2216 (*e->e_putbody)(&mcibuf, e, NULL); 2217 putline("\n", &mcibuf); 2218 if (ferror(f)) 2219 { 2220 message("451 I/O error: %s", errstring(errno)); 2221 setstat(EX_IOERR); 2222 } 2223 (void) xfclose(f, "mailfile", filename); 2224 (void) fflush(stdout); 2225 2226 /* reset ISUID & ISGID bits for paranoid systems */ 2227 (void) chmod(filename, (int) stb.st_mode); 2228 exit(ExitStat); 2229 /*NOTREACHED*/ 2230 } 2231 else 2232 { 2233 /* parent -- wait for exit status */ 2234 int st; 2235 2236 st = waitfor(pid); 2237 if (WIFEXITED(st)) 2238 return (WEXITSTATUS(st)); 2239 else 2240 { 2241 syserr("child died on signal %d", st); 2242 return (EX_UNAVAILABLE); 2243 } 2244 /*NOTREACHED*/ 2245 } 2246 } 2247 /* 2248 ** HOSTSIGNATURE -- return the "signature" for a host. 2249 ** 2250 ** The signature describes how we are going to send this -- it 2251 ** can be just the hostname (for non-Internet hosts) or can be 2252 ** an ordered list of MX hosts. 2253 ** 2254 ** Parameters: 2255 ** m -- the mailer describing this host. 2256 ** host -- the host name. 2257 ** e -- the current envelope. 2258 ** 2259 ** Returns: 2260 ** The signature for this host. 2261 ** 2262 ** Side Effects: 2263 ** Can tweak the symbol table. 2264 */ 2265 2266 char * 2267 hostsignature(m, host, e) 2268 register MAILER *m; 2269 char *host; 2270 ENVELOPE *e; 2271 { 2272 register char *p; 2273 register STAB *s; 2274 int i; 2275 int len; 2276 #if NAMED_BIND 2277 int nmx; 2278 auto int rcode; 2279 char *hp; 2280 char *endp; 2281 int oldoptions; 2282 char *mxhosts[MAXMXHOSTS + 1]; 2283 #endif 2284 2285 /* 2286 ** Check to see if this uses IPC -- if not, it can't have MX records. 2287 */ 2288 2289 p = m->m_mailer; 2290 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2291 { 2292 /* just an ordinary mailer */ 2293 return host; 2294 } 2295 2296 /* 2297 ** Look it up in the symbol table. 2298 */ 2299 2300 s = stab(host, ST_HOSTSIG, ST_ENTER); 2301 if (s->s_hostsig != NULL) 2302 return s->s_hostsig; 2303 2304 /* 2305 ** Not already there -- create a signature. 2306 */ 2307 2308 #if NAMED_BIND 2309 if (ConfigLevel < 2) 2310 { 2311 oldoptions = _res.options; 2312 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2313 } 2314 2315 for (hp = host; hp != NULL; hp = endp) 2316 { 2317 endp = strchr(hp, ':'); 2318 if (endp != NULL) 2319 *endp = '\0'; 2320 2321 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2322 2323 if (nmx <= 0) 2324 { 2325 register MCI *mci; 2326 2327 /* update the connection info for this host */ 2328 mci = mci_get(hp, m); 2329 mci->mci_exitstat = rcode; 2330 mci->mci_errno = errno; 2331 #if NAMED_BIND 2332 mci->mci_herrno = h_errno; 2333 #endif 2334 2335 /* and return the original host name as the signature */ 2336 nmx = 1; 2337 mxhosts[0] = hp; 2338 } 2339 2340 len = 0; 2341 for (i = 0; i < nmx; i++) 2342 { 2343 len += strlen(mxhosts[i]) + 1; 2344 } 2345 if (s->s_hostsig != NULL) 2346 len += strlen(s->s_hostsig) + 1; 2347 p = xalloc(len); 2348 if (s->s_hostsig != NULL) 2349 { 2350 (void) strcpy(p, s->s_hostsig); 2351 free(s->s_hostsig); 2352 s->s_hostsig = p; 2353 p += strlen(p); 2354 *p++ = ':'; 2355 } 2356 else 2357 s->s_hostsig = p; 2358 for (i = 0; i < nmx; i++) 2359 { 2360 if (i != 0) 2361 *p++ = ':'; 2362 strcpy(p, mxhosts[i]); 2363 p += strlen(p); 2364 } 2365 if (endp != NULL) 2366 *endp++ = ':'; 2367 } 2368 makelower(s->s_hostsig); 2369 if (ConfigLevel < 2) 2370 _res.options = oldoptions; 2371 #else 2372 /* not using BIND -- the signature is just the host name */ 2373 s->s_hostsig = host; 2374 #endif 2375 if (tTd(17, 1)) 2376 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2377 return s->s_hostsig; 2378 } 2379