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 8.74 (Berkeley) 02/26/94"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <netdb.h> 15 #include <errno.h> 16 #ifdef 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 q->q_flags |= QDONTSEND; 227 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 228 if (q->q_owner != owner) 229 q->q_flags |= QDONTSEND; 230 231 if (e->e_df != NULL && mode != SM_VERIFY) 232 { 233 ee->e_dfp = NULL; 234 ee->e_df = queuename(ee, 'd'); 235 ee->e_df = newstr(ee->e_df); 236 if (link(e->e_df, ee->e_df) < 0) 237 { 238 syserr("sendall: link(%s, %s)", 239 e->e_df, ee->e_df); 240 } 241 } 242 #ifdef LOG 243 if (LogLevel > 4) 244 syslog(LOG_INFO, "%s: clone %s, owner=%s", 245 ee->e_id, e->e_id, owner); 246 #endif 247 } 248 } 249 250 if (owner != NULL) 251 { 252 setsender(owner, e, NULL, TRUE); 253 if (tTd(13, 5)) 254 { 255 printf("sendall(owner): QDONTSEND "); 256 printaddr(&e->e_from, FALSE); 257 } 258 e->e_from.q_flags |= QDONTSEND; 259 e->e_errormode = EM_MAIL; 260 } 261 262 # ifdef QUEUE 263 if ((mode == SM_QUEUE || mode == SM_FORK || 264 (mode != SM_VERIFY && SuperSafe)) && 265 !bitset(EF_INQUEUE, e->e_flags)) 266 { 267 /* be sure everything is instantiated in the queue */ 268 queueup(e, TRUE, announcequeueup); 269 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 270 queueup(ee, TRUE, announcequeueup); 271 } 272 #endif /* QUEUE */ 273 274 if (splitenv != NULL) 275 { 276 if (tTd(13, 1)) 277 { 278 printf("\nsendall: Split queue; remaining queue:\n"); 279 printaddr(e->e_sendqueue, TRUE); 280 } 281 282 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 283 { 284 CurEnv = ee; 285 if (mode != SM_VERIFY) 286 openxscript(ee); 287 sendenvelope(ee, mode); 288 dropenvelope(ee); 289 } 290 291 CurEnv = e; 292 } 293 sendenvelope(e, mode); 294 } 295 296 sendenvelope(e, mode) 297 register ENVELOPE *e; 298 char mode; 299 { 300 bool oldverbose; 301 int pid; 302 register ADDRESS *q; 303 char *qf; 304 char *id; 305 306 /* 307 ** If we have had global, fatal errors, don't bother sending 308 ** the message at all if we are in SMTP mode. Local errors 309 ** (e.g., a single address failing) will still cause the other 310 ** addresses to be sent. 311 */ 312 313 if (bitset(EF_FATALERRS, e->e_flags) && 314 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 315 { 316 e->e_flags |= EF_CLRQUEUE; 317 return; 318 } 319 320 oldverbose = Verbose; 321 switch (mode) 322 { 323 case SM_VERIFY: 324 Verbose = TRUE; 325 break; 326 327 case SM_QUEUE: 328 queueonly: 329 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 330 return; 331 332 case SM_FORK: 333 if (e->e_xfp != NULL) 334 (void) fflush(e->e_xfp); 335 336 # if !HASFLOCK 337 /* 338 ** Since fcntl locking has the interesting semantic that 339 ** the lock is owned by a process, not by an open file 340 ** descriptor, we have to flush this to the queue, and 341 ** then restart from scratch in the child. 342 */ 343 344 /* save id for future use */ 345 id = e->e_id; 346 347 /* now drop the envelope in the parent */ 348 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 349 dropenvelope(e); 350 351 /* and reacquire in the child */ 352 (void) dowork(id, TRUE, FALSE, e); 353 354 return; 355 356 # else /* HASFLOCK */ 357 358 pid = fork(); 359 if (pid < 0) 360 { 361 goto queueonly; 362 } 363 else if (pid > 0) 364 { 365 /* be sure we leave the temp files to our child */ 366 /* can't call unlockqueue to avoid unlink of xfp */ 367 if (e->e_lockfp != NULL) 368 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 369 e->e_lockfp = NULL; 370 371 /* close any random open files in the envelope */ 372 closexscript(e); 373 if (e->e_dfp != NULL) 374 (void) xfclose(e->e_dfp, "sendenvelope", e->e_df); 375 e->e_dfp = NULL; 376 e->e_id = e->e_df = NULL; 377 378 /* catch intermediate zombie */ 379 (void) waitfor(pid); 380 return; 381 } 382 383 /* double fork to avoid zombies */ 384 pid = fork(); 385 if (pid > 0) 386 exit(EX_OK); 387 388 /* be sure we are immune from the terminal */ 389 disconnect(1, e); 390 391 /* prevent parent from waiting if there was an error */ 392 if (pid < 0) 393 { 394 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 395 finis(); 396 } 397 398 /* 399 ** Close any cached connections. 400 ** 401 ** We don't send the QUIT protocol because the parent 402 ** still knows about the connection. 403 ** 404 ** This should only happen when delivering an error 405 ** message. 406 */ 407 408 mci_flush(FALSE, NULL); 409 410 # endif /* HASFLOCK */ 411 412 break; 413 } 414 415 /* 416 ** Run through the list and send everything. 417 ** 418 ** Set EF_GLOBALERRS so that error messages during delivery 419 ** result in returned mail. 420 */ 421 422 e->e_nsent = 0; 423 e->e_flags |= EF_GLOBALERRS; 424 425 /* now run through the queue */ 426 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 427 { 428 #ifdef XDEBUG 429 char wbuf[MAXNAME + 20]; 430 431 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 432 checkfd012(wbuf); 433 #endif 434 if (mode == SM_VERIFY) 435 { 436 e->e_to = q->q_paddr; 437 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 438 { 439 if (q->q_host != NULL && q->q_host[0] != '\0') 440 message("deliverable: mailer %s, host %s, user %s", 441 q->q_mailer->m_name, 442 q->q_host, 443 q->q_user); 444 else 445 message("deliverable: mailer %s, user %s", 446 q->q_mailer->m_name, 447 q->q_user); 448 } 449 } 450 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 451 { 452 # ifdef QUEUE 453 /* 454 ** Checkpoint the send list every few addresses 455 */ 456 457 if (e->e_nsent >= CheckpointInterval) 458 { 459 queueup(e, TRUE, FALSE); 460 e->e_nsent = 0; 461 } 462 # endif /* QUEUE */ 463 (void) deliver(e, q); 464 } 465 } 466 Verbose = oldverbose; 467 468 #ifdef XDEBUG 469 checkfd012("end of sendenvelope"); 470 #endif 471 472 if (mode == SM_FORK) 473 finis(); 474 } 475 /* 476 ** DOFORK -- do a fork, retrying a couple of times on failure. 477 ** 478 ** This MUST be a macro, since after a vfork we are running 479 ** two processes on the same stack!!! 480 ** 481 ** Parameters: 482 ** none. 483 ** 484 ** Returns: 485 ** From a macro??? You've got to be kidding! 486 ** 487 ** Side Effects: 488 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 489 ** pid of child in parent, zero in child. 490 ** -1 on unrecoverable error. 491 ** 492 ** Notes: 493 ** I'm awfully sorry this looks so awful. That's 494 ** vfork for you..... 495 */ 496 497 # define NFORKTRIES 5 498 499 # ifndef FORK 500 # define FORK fork 501 # endif 502 503 # define DOFORK(fORKfN) \ 504 {\ 505 register int i;\ 506 \ 507 for (i = NFORKTRIES; --i >= 0; )\ 508 {\ 509 pid = fORKfN();\ 510 if (pid >= 0)\ 511 break;\ 512 if (i > 0)\ 513 sleep((unsigned) NFORKTRIES - i);\ 514 }\ 515 } 516 /* 517 ** DOFORK -- simple fork interface to DOFORK. 518 ** 519 ** Parameters: 520 ** none. 521 ** 522 ** Returns: 523 ** pid of child in parent. 524 ** zero in child. 525 ** -1 on error. 526 ** 527 ** Side Effects: 528 ** returns twice, once in parent and once in child. 529 */ 530 531 dofork() 532 { 533 register int pid; 534 535 DOFORK(fork); 536 return (pid); 537 } 538 /* 539 ** DELIVER -- Deliver a message to a list of addresses. 540 ** 541 ** This routine delivers to everyone on the same host as the 542 ** user on the head of the list. It is clever about mailers 543 ** that don't handle multiple users. It is NOT guaranteed 544 ** that it will deliver to all these addresses however -- so 545 ** deliver should be called once for each address on the 546 ** list. 547 ** 548 ** Parameters: 549 ** e -- the envelope to deliver. 550 ** firstto -- head of the address list to deliver to. 551 ** 552 ** Returns: 553 ** zero -- successfully delivered. 554 ** else -- some failure, see ExitStat for more info. 555 ** 556 ** Side Effects: 557 ** The standard input is passed off to someone. 558 */ 559 560 deliver(e, firstto) 561 register ENVELOPE *e; 562 ADDRESS *firstto; 563 { 564 char *host; /* host being sent to */ 565 char *user; /* user being sent to */ 566 char **pvp; 567 register char **mvp; 568 register char *p; 569 register MAILER *m; /* mailer for this recipient */ 570 ADDRESS *ctladdr; 571 register MCI *mci; 572 register ADDRESS *to = firstto; 573 bool clever = FALSE; /* running user smtp to this mailer */ 574 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 575 int rcode; /* response code */ 576 char *firstsig; /* signature of firstto */ 577 int pid; 578 char *curhost; 579 int mpvect[2]; 580 int rpvect[2]; 581 char *pv[MAXPV+1]; 582 char tobuf[TOBUFSIZE]; /* text line of to people */ 583 char buf[MAXNAME]; 584 char rpathbuf[MAXNAME]; /* translated return path */ 585 extern int checkcompat(); 586 587 errno = 0; 588 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 589 return (0); 590 591 #ifdef NAMED_BIND 592 /* unless interactive, try twice, over a minute */ 593 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) 594 { 595 _res.retrans = 30; 596 _res.retry = 2; 597 } 598 #endif 599 600 m = to->q_mailer; 601 host = to->q_host; 602 CurEnv = e; /* just in case */ 603 e->e_statmsg = NULL; 604 SmtpError[0] = '\0'; 605 606 if (tTd(10, 1)) 607 printf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n", 608 e->e_id, m->m_name, host, to->q_user); 609 if (tTd(10, 100)) 610 printopenfds(FALSE); 611 612 /* 613 ** If this mailer is expensive, and if we don't want to make 614 ** connections now, just mark these addresses and return. 615 ** This is useful if we want to batch connections to 616 ** reduce load. This will cause the messages to be 617 ** queued up, and a daemon will come along to send the 618 ** messages later. 619 ** This should be on a per-mailer basis. 620 */ 621 622 if (NoConnect && bitnset(M_EXPENSIVE, m->m_flags) && !Verbose) 623 { 624 for (; to != NULL; to = to->q_next) 625 { 626 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 627 to->q_mailer != m) 628 continue; 629 to->q_flags |= QQUEUEUP; 630 e->e_to = to->q_paddr; 631 message("queued"); 632 if (LogLevel > 8) 633 logdelivery(m, NULL, "queued", NULL, e); 634 } 635 e->e_to = NULL; 636 return (0); 637 } 638 639 /* 640 ** Do initial argv setup. 641 ** Insert the mailer name. Notice that $x expansion is 642 ** NOT done on the mailer name. Then, if the mailer has 643 ** a picky -f flag, we insert it as appropriate. This 644 ** code does not check for 'pv' overflow; this places a 645 ** manifest lower limit of 4 for MAXPV. 646 ** The from address rewrite is expected to make 647 ** the address relative to the other end. 648 */ 649 650 /* rewrite from address, using rewriting rules */ 651 rcode = EX_OK; 652 (void) strcpy(rpathbuf, remotename(e->e_from.q_paddr, m, 653 RF_SENDERADDR|RF_CANONICAL, 654 &rcode, e)); 655 define('g', rpathbuf, e); /* translated return path */ 656 define('h', host, e); /* to host */ 657 Errors = 0; 658 pvp = pv; 659 *pvp++ = m->m_argv[0]; 660 661 /* insert -f or -r flag as appropriate */ 662 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 663 { 664 if (bitnset(M_FOPT, m->m_flags)) 665 *pvp++ = "-f"; 666 else 667 *pvp++ = "-r"; 668 *pvp++ = newstr(rpathbuf); 669 } 670 671 /* 672 ** Append the other fixed parts of the argv. These run 673 ** up to the first entry containing "$u". There can only 674 ** be one of these, and there are only a few more slots 675 ** in the pv after it. 676 */ 677 678 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 679 { 680 /* can't use strchr here because of sign extension problems */ 681 while (*p != '\0') 682 { 683 if ((*p++ & 0377) == MACROEXPAND) 684 { 685 if (*p == 'u') 686 break; 687 } 688 } 689 690 if (*p != '\0') 691 break; 692 693 /* this entry is safe -- go ahead and process it */ 694 expand(*mvp, buf, &buf[sizeof buf - 1], e); 695 *pvp++ = newstr(buf); 696 if (pvp >= &pv[MAXPV - 3]) 697 { 698 syserr("554 Too many parameters to %s before $u", pv[0]); 699 return (-1); 700 } 701 } 702 703 /* 704 ** If we have no substitution for the user name in the argument 705 ** list, we know that we must supply the names otherwise -- and 706 ** SMTP is the answer!! 707 */ 708 709 if (*mvp == NULL) 710 { 711 /* running SMTP */ 712 # ifdef SMTP 713 clever = TRUE; 714 *pvp = NULL; 715 # else /* SMTP */ 716 /* oops! we don't implement SMTP */ 717 syserr("554 SMTP style mailer not implemented"); 718 return (EX_SOFTWARE); 719 # endif /* SMTP */ 720 } 721 722 /* 723 ** At this point *mvp points to the argument with $u. We 724 ** run through our address list and append all the addresses 725 ** we can. If we run out of space, do not fret! We can 726 ** always send another copy later. 727 */ 728 729 tobuf[0] = '\0'; 730 e->e_to = tobuf; 731 ctladdr = NULL; 732 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 733 for (; to != NULL; to = to->q_next) 734 { 735 /* avoid sending multiple recipients to dumb mailers */ 736 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 737 break; 738 739 /* if already sent or not for this host, don't send */ 740 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 741 to->q_mailer != firstto->q_mailer || 742 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 743 continue; 744 745 /* avoid overflowing tobuf */ 746 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 747 break; 748 749 if (tTd(10, 1)) 750 { 751 printf("\nsend to "); 752 printaddr(to, FALSE); 753 } 754 755 /* compute effective uid/gid when sending */ 756 /* XXX perhaps this should be to->q_mailer != LocalMailer ?? */ 757 /* XXX perhaps it should be a mailer flag? */ 758 if (to->q_mailer == ProgMailer || to->q_mailer == FileMailer) 759 ctladdr = getctladdr(to); 760 761 user = to->q_user; 762 e->e_to = to->q_paddr; 763 if (tTd(10, 5)) 764 { 765 printf("deliver: QDONTSEND "); 766 printaddr(to, FALSE); 767 } 768 to->q_flags |= QDONTSEND; 769 770 /* 771 ** Check to see that these people are allowed to 772 ** talk to each other. 773 */ 774 775 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 776 { 777 NoReturn = TRUE; 778 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 779 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, e); 780 continue; 781 } 782 rcode = checkcompat(to, e); 783 if (rcode != EX_OK) 784 { 785 markfailure(e, to, rcode); 786 giveresponse(rcode, m, NULL, ctladdr, e); 787 continue; 788 } 789 790 /* 791 ** Strip quote bits from names if the mailer is dumb 792 ** about them. 793 */ 794 795 if (bitnset(M_STRIPQ, m->m_flags)) 796 { 797 stripquotes(user); 798 stripquotes(host); 799 } 800 801 /* hack attack -- delivermail compatibility */ 802 if (m == ProgMailer && *user == '|') 803 user++; 804 805 /* 806 ** If an error message has already been given, don't 807 ** bother to send to this address. 808 ** 809 ** >>>>>>>>>> This clause assumes that the local mailer 810 ** >> NOTE >> cannot do any further aliasing; that 811 ** >>>>>>>>>> function is subsumed by sendmail. 812 */ 813 814 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 815 continue; 816 817 /* save statistics.... */ 818 markstats(e, to); 819 820 /* 821 ** See if this user name is "special". 822 ** If the user name has a slash in it, assume that this 823 ** is a file -- send it off without further ado. Note 824 ** that this type of addresses is not processed along 825 ** with the others, so we fudge on the To person. 826 */ 827 828 if (m == FileMailer) 829 { 830 rcode = mailfile(user, ctladdr, e); 831 giveresponse(rcode, m, NULL, ctladdr, e); 832 if (rcode == EX_OK) 833 to->q_flags |= QSENT; 834 continue; 835 } 836 837 /* 838 ** Address is verified -- add this user to mailer 839 ** argv, and add it to the print list of recipients. 840 */ 841 842 /* link together the chain of recipients */ 843 to->q_tchain = tochain; 844 tochain = to; 845 846 /* create list of users for error messages */ 847 (void) strcat(tobuf, ","); 848 (void) strcat(tobuf, to->q_paddr); 849 define('u', user, e); /* to user */ 850 p = to->q_home; 851 if (p == NULL && ctladdr != NULL) 852 p = ctladdr->q_home; 853 define('z', p, e); /* user's home */ 854 855 /* 856 ** Expand out this user into argument list. 857 */ 858 859 if (!clever) 860 { 861 expand(*mvp, buf, &buf[sizeof buf - 1], e); 862 *pvp++ = newstr(buf); 863 if (pvp >= &pv[MAXPV - 2]) 864 { 865 /* allow some space for trailing parms */ 866 break; 867 } 868 } 869 } 870 871 /* see if any addresses still exist */ 872 if (tobuf[0] == '\0') 873 { 874 define('g', (char *) NULL, e); 875 return (0); 876 } 877 878 /* print out messages as full list */ 879 e->e_to = tobuf + 1; 880 881 /* 882 ** Fill out any parameters after the $u parameter. 883 */ 884 885 while (!clever && *++mvp != NULL) 886 { 887 expand(*mvp, buf, &buf[sizeof buf - 1], e); 888 *pvp++ = newstr(buf); 889 if (pvp >= &pv[MAXPV]) 890 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 891 } 892 *pvp++ = NULL; 893 894 /* 895 ** Call the mailer. 896 ** The argument vector gets built, pipes 897 ** are created as necessary, and we fork & exec as 898 ** appropriate. 899 ** If we are running SMTP, we just need to clean up. 900 */ 901 902 /*XXX this seems a bit wierd */ 903 if (ctladdr == NULL && m != ProgMailer && 904 bitset(QGOODUID, e->e_from.q_flags)) 905 ctladdr = &e->e_from; 906 907 #ifdef NAMED_BIND 908 if (ConfigLevel < 2) 909 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 910 #endif 911 912 if (tTd(11, 1)) 913 { 914 printf("openmailer:"); 915 printav(pv); 916 } 917 errno = 0; 918 919 CurHostName = m->m_mailer; 920 921 /* 922 ** Deal with the special case of mail handled through an IPC 923 ** connection. 924 ** In this case we don't actually fork. We must be 925 ** running SMTP for this to work. We will return a 926 ** zero pid to indicate that we are running IPC. 927 ** We also handle a debug version that just talks to stdin/out. 928 */ 929 930 curhost = NULL; 931 SmtpPhase = NULL; 932 mci = NULL; 933 934 #ifdef XDEBUG 935 { 936 char wbuf[MAXLINE]; 937 938 /* make absolutely certain 0, 1, and 2 are in use */ 939 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 940 checkfd012(wbuf); 941 } 942 #endif 943 944 /* check for Local Person Communication -- not for mortals!!! */ 945 if (strcmp(m->m_mailer, "[LPC]") == 0) 946 { 947 mci = (MCI *) xalloc(sizeof *mci); 948 bzero((char *) mci, sizeof *mci); 949 mci->mci_in = stdin; 950 mci->mci_out = stdout; 951 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 952 mci->mci_mailer = m; 953 } 954 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 955 strcmp(m->m_mailer, "[TCP]") == 0) 956 { 957 #ifdef DAEMON 958 register int i; 959 register u_short port; 960 961 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 962 { 963 syserr("null host name for %s mailer", m->m_mailer); 964 rcode = EX_CONFIG; 965 goto give_up; 966 } 967 968 CurHostName = pv[1]; 969 curhost = hostsignature(m, pv[1], e); 970 971 if (curhost == NULL || curhost[0] == '\0') 972 { 973 syserr("null host signature for %s", pv[1]); 974 rcode = EX_OSERR; 975 goto give_up; 976 } 977 978 if (!clever) 979 { 980 syserr("554 non-clever IPC"); 981 rcode = EX_CONFIG; 982 goto give_up; 983 } 984 if (pv[2] != NULL) 985 port = atoi(pv[2]); 986 else 987 port = 0; 988 tryhost: 989 while (*curhost != '\0') 990 { 991 register char *p; 992 static char hostbuf[MAXNAME]; 993 994 /* pull the next host from the signature */ 995 p = strchr(curhost, ':'); 996 if (p == NULL) 997 p = &curhost[strlen(curhost)]; 998 if (p == curhost) 999 { 1000 syserr("deliver: null host name in signature"); 1001 curhost++; 1002 continue; 1003 } 1004 strncpy(hostbuf, curhost, p - curhost); 1005 hostbuf[p - curhost] = '\0'; 1006 if (*p != '\0') 1007 p++; 1008 curhost = p; 1009 1010 /* see if we already know that this host is fried */ 1011 CurHostName = hostbuf; 1012 mci = mci_get(hostbuf, m); 1013 if (mci->mci_state != MCIS_CLOSED) 1014 { 1015 if (tTd(11, 1)) 1016 { 1017 printf("openmailer: "); 1018 mci_dump(mci, FALSE); 1019 } 1020 CurHostName = mci->mci_host; 1021 break; 1022 } 1023 mci->mci_mailer = m; 1024 if (mci->mci_exitstat != EX_OK) 1025 continue; 1026 1027 /* try the connection */ 1028 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1029 message("Connecting to %s (%s)...", 1030 hostbuf, m->m_name); 1031 i = makeconnection(hostbuf, port, mci, 1032 bitnset(M_SECURE_PORT, m->m_flags)); 1033 mci->mci_exitstat = i; 1034 mci->mci_errno = errno; 1035 #ifdef NAMED_BIND 1036 mci->mci_herrno = h_errno; 1037 #endif 1038 if (i == EX_OK) 1039 { 1040 mci->mci_state = MCIS_OPENING; 1041 mci_cache(mci); 1042 if (TrafficLogFile != NULL) 1043 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1044 getpid(), hostbuf); 1045 break; 1046 } 1047 else if (tTd(11, 1)) 1048 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1049 i, errno); 1050 1051 /* enter status of this host */ 1052 setstat(i); 1053 1054 /* should print some message here for -v mode */ 1055 } 1056 if (mci == NULL) 1057 { 1058 syserr("deliver: no host name"); 1059 rcode = EX_OSERR; 1060 goto give_up; 1061 } 1062 mci->mci_pid = 0; 1063 #else /* no DAEMON */ 1064 syserr("554 openmailer: no IPC"); 1065 if (tTd(11, 1)) 1066 printf("openmailer: NULL\n"); 1067 rcode = EX_UNAVAILABLE; 1068 goto give_up; 1069 #endif /* DAEMON */ 1070 } 1071 else 1072 { 1073 if (TrafficLogFile != NULL) 1074 { 1075 char **av; 1076 1077 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1078 for (av = pv; *av != NULL; av++) 1079 fprintf(TrafficLogFile, " %s", *av); 1080 fprintf(TrafficLogFile, "\n"); 1081 } 1082 1083 /* create a pipe to shove the mail through */ 1084 if (pipe(mpvect) < 0) 1085 { 1086 syserr("%s... openmailer(%s): pipe (to mailer)", 1087 e->e_to, m->m_name); 1088 if (tTd(11, 1)) 1089 printf("openmailer: NULL\n"); 1090 rcode = EX_OSERR; 1091 goto give_up; 1092 } 1093 1094 /* if this mailer speaks smtp, create a return pipe */ 1095 if (clever && pipe(rpvect) < 0) 1096 { 1097 syserr("%s... openmailer(%s): pipe (from mailer)", 1098 e->e_to, m->m_name); 1099 (void) close(mpvect[0]); 1100 (void) close(mpvect[1]); 1101 if (tTd(11, 1)) 1102 printf("openmailer: NULL\n"); 1103 rcode = EX_OSERR; 1104 goto give_up; 1105 } 1106 1107 /* 1108 ** Actually fork the mailer process. 1109 ** DOFORK is clever about retrying. 1110 ** 1111 ** Dispose of SIGCHLD signal catchers that may be laying 1112 ** around so that endmail will get it. 1113 */ 1114 1115 if (e->e_xfp != NULL) 1116 (void) fflush(e->e_xfp); /* for debugging */ 1117 (void) fflush(stdout); 1118 # ifdef SIGCHLD 1119 (void) setsignal(SIGCHLD, SIG_DFL); 1120 # endif /* SIGCHLD */ 1121 DOFORK(FORK); 1122 /* pid is set by DOFORK */ 1123 if (pid < 0) 1124 { 1125 /* failure */ 1126 syserr("%s... openmailer(%s): cannot fork", 1127 e->e_to, m->m_name); 1128 (void) close(mpvect[0]); 1129 (void) close(mpvect[1]); 1130 if (clever) 1131 { 1132 (void) close(rpvect[0]); 1133 (void) close(rpvect[1]); 1134 } 1135 if (tTd(11, 1)) 1136 printf("openmailer: NULL\n"); 1137 rcode = EX_OSERR; 1138 goto give_up; 1139 } 1140 else if (pid == 0) 1141 { 1142 int i; 1143 int saveerrno; 1144 char **ep; 1145 char *env[MAXUSERENVIRON]; 1146 extern char **environ; 1147 extern int DtableSize; 1148 1149 /* child -- set up input & exec mailer */ 1150 (void) setsignal(SIGINT, SIG_IGN); 1151 (void) setsignal(SIGHUP, SIG_IGN); 1152 (void) setsignal(SIGTERM, SIG_DFL); 1153 1154 /* reset user and group */ 1155 if (!bitnset(M_RESTR, m->m_flags)) 1156 { 1157 if (ctladdr == NULL || ctladdr->q_uid == 0) 1158 { 1159 (void) initgroups(DefUser, DefGid); 1160 (void) setgid(DefGid); 1161 (void) setuid(DefUid); 1162 } 1163 else 1164 { 1165 (void) initgroups(ctladdr->q_ruser? 1166 ctladdr->q_ruser: ctladdr->q_user, 1167 ctladdr->q_gid); 1168 (void) setgid(ctladdr->q_gid); 1169 (void) setuid(ctladdr->q_uid); 1170 } 1171 } 1172 1173 if (tTd(11, 2)) 1174 printf("openmailer: running as r/euid=%d/%d\n", 1175 getuid(), geteuid()); 1176 1177 /* move into some "safe" directory */ 1178 if (m->m_execdir != NULL) 1179 { 1180 char *p, *q; 1181 char buf[MAXLINE]; 1182 1183 for (p = m->m_execdir; p != NULL; p = q) 1184 { 1185 q = strchr(p, ':'); 1186 if (q != NULL) 1187 *q = '\0'; 1188 expand(p, buf, &buf[sizeof buf] - 1, e); 1189 if (q != NULL) 1190 *q++ = ':'; 1191 if (tTd(11, 20)) 1192 printf("openmailer: trydir %s\n", 1193 buf); 1194 if (buf[0] != '\0' && chdir(buf) >= 0) 1195 break; 1196 } 1197 } 1198 1199 /* arrange to filter std & diag output of command */ 1200 if (clever) 1201 { 1202 (void) close(rpvect[0]); 1203 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1204 { 1205 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1206 e->e_to, m->m_name, rpvect[1]); 1207 _exit(EX_OSERR); 1208 } 1209 (void) close(rpvect[1]); 1210 } 1211 else if (OpMode == MD_SMTP || OpMode == MD_DAEMON || 1212 HoldErrs || DisConnected) 1213 { 1214 /* put mailer output in transcript */ 1215 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1216 { 1217 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1218 e->e_to, m->m_name, 1219 fileno(e->e_xfp)); 1220 _exit(EX_OSERR); 1221 } 1222 } 1223 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1224 { 1225 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1226 e->e_to, m->m_name); 1227 _exit(EX_OSERR); 1228 } 1229 1230 /* arrange to get standard input */ 1231 (void) close(mpvect[1]); 1232 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1233 { 1234 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1235 e->e_to, m->m_name, mpvect[0]); 1236 _exit(EX_OSERR); 1237 } 1238 (void) close(mpvect[0]); 1239 1240 /* arrange for all the files to be closed */ 1241 for (i = 3; i < DtableSize; i++) 1242 { 1243 register int j; 1244 1245 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1246 (void) fcntl(i, F_SETFD, j | 1); 1247 } 1248 1249 /* 1250 ** Set up the mailer environment 1251 ** TZ is timezone information. 1252 ** SYSTYPE is Apollo software sys type (required). 1253 ** ISP is Apollo hardware system type (required). 1254 */ 1255 1256 i = 0; 1257 env[i++] = "AGENT=sendmail"; 1258 for (ep = environ; *ep != NULL; ep++) 1259 { 1260 if (strncmp(*ep, "TZ=", 3) == 0 || 1261 strncmp(*ep, "ISP=", 4) == 0 || 1262 strncmp(*ep, "SYSTYPE=", 8) == 0) 1263 env[i++] = *ep; 1264 } 1265 env[i++] = NULL; 1266 1267 /* try to execute the mailer */ 1268 execve(m->m_mailer, pv, env); 1269 saveerrno = errno; 1270 syserr("Cannot exec %s", m->m_mailer); 1271 if (m == LocalMailer || transienterror(saveerrno)) 1272 _exit(EX_OSERR); 1273 _exit(EX_UNAVAILABLE); 1274 } 1275 1276 /* 1277 ** Set up return value. 1278 */ 1279 1280 mci = (MCI *) xalloc(sizeof *mci); 1281 bzero((char *) mci, sizeof *mci); 1282 mci->mci_mailer = m; 1283 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1284 mci->mci_pid = pid; 1285 (void) close(mpvect[0]); 1286 mci->mci_out = fdopen(mpvect[1], "w"); 1287 if (mci->mci_out == NULL) 1288 { 1289 syserr("deliver: cannot create mailer output channel, fd=%d", 1290 mpvect[1]); 1291 (void) close(mpvect[1]); 1292 if (clever) 1293 { 1294 (void) close(rpvect[0]); 1295 (void) close(rpvect[1]); 1296 } 1297 rcode = EX_OSERR; 1298 goto give_up; 1299 } 1300 if (clever) 1301 { 1302 (void) close(rpvect[1]); 1303 mci->mci_in = fdopen(rpvect[0], "r"); 1304 if (mci->mci_in == NULL) 1305 { 1306 syserr("deliver: cannot create mailer input channel, fd=%d", 1307 mpvect[1]); 1308 (void) close(rpvect[0]); 1309 fclose(mci->mci_out); 1310 mci->mci_out = NULL; 1311 rcode = EX_OSERR; 1312 goto give_up; 1313 } 1314 } 1315 else 1316 { 1317 mci->mci_flags |= MCIF_TEMP; 1318 mci->mci_in = NULL; 1319 } 1320 } 1321 1322 /* 1323 ** If we are in SMTP opening state, send initial protocol. 1324 */ 1325 1326 if (clever && mci->mci_state != MCIS_CLOSED) 1327 { 1328 smtpinit(m, mci, e); 1329 } 1330 if (tTd(11, 1)) 1331 { 1332 printf("openmailer: "); 1333 mci_dump(mci, FALSE); 1334 } 1335 1336 if (mci->mci_state != MCIS_OPEN) 1337 { 1338 /* couldn't open the mailer */ 1339 rcode = mci->mci_exitstat; 1340 errno = mci->mci_errno; 1341 #ifdef NAMED_BIND 1342 h_errno = mci->mci_herrno; 1343 #endif 1344 if (rcode == EX_OK) 1345 { 1346 /* shouldn't happen */ 1347 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1348 rcode, mci->mci_state, firstsig); 1349 rcode = EX_SOFTWARE; 1350 } 1351 else if (rcode == EX_TEMPFAIL && curhost != NULL && *curhost != '\0') 1352 { 1353 /* try next MX site */ 1354 goto tryhost; 1355 } 1356 } 1357 else if (!clever) 1358 { 1359 /* 1360 ** Format and send message. 1361 */ 1362 1363 putfromline(mci, e); 1364 (*e->e_puthdr)(mci, e); 1365 putline("\n", mci); 1366 (*e->e_putbody)(mci, e, NULL); 1367 1368 /* get the exit status */ 1369 rcode = endmailer(mci, e, pv); 1370 } 1371 else 1372 #ifdef SMTP 1373 { 1374 /* 1375 ** Send the MAIL FROM: protocol 1376 */ 1377 1378 rcode = smtpmailfrom(m, mci, e); 1379 if (rcode == EX_OK) 1380 { 1381 register char *t = tobuf; 1382 register int i; 1383 1384 /* send the recipient list */ 1385 tobuf[0] = '\0'; 1386 for (to = tochain; to != NULL; to = to->q_tchain) 1387 { 1388 e->e_to = to->q_paddr; 1389 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1390 { 1391 markfailure(e, to, i); 1392 giveresponse(i, m, mci, ctladdr, e); 1393 } 1394 else 1395 { 1396 *t++ = ','; 1397 for (p = to->q_paddr; *p; *t++ = *p++) 1398 continue; 1399 *t = '\0'; 1400 } 1401 } 1402 1403 /* now send the data */ 1404 if (tobuf[0] == '\0') 1405 { 1406 rcode = EX_OK; 1407 e->e_to = NULL; 1408 if (bitset(MCIF_CACHED, mci->mci_flags)) 1409 smtprset(m, mci, e); 1410 } 1411 else 1412 { 1413 e->e_to = tobuf + 1; 1414 rcode = smtpdata(m, mci, e); 1415 } 1416 1417 /* now close the connection */ 1418 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1419 smtpquit(m, mci, e); 1420 } 1421 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1422 { 1423 /* try next MX site */ 1424 goto tryhost; 1425 } 1426 } 1427 #else /* not SMTP */ 1428 { 1429 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1430 rcode = EX_CONFIG; 1431 goto give_up; 1432 } 1433 #endif /* SMTP */ 1434 #ifdef NAMED_BIND 1435 if (ConfigLevel < 2) 1436 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1437 #endif 1438 1439 /* arrange a return receipt if requested */ 1440 if (rcode == EX_OK && e->e_receiptto != NULL && 1441 bitnset(M_LOCALMAILER, m->m_flags)) 1442 { 1443 e->e_flags |= EF_SENDRECEIPT; 1444 /* do we want to send back more info? */ 1445 } 1446 1447 /* 1448 ** Do final status disposal. 1449 ** We check for something in tobuf for the SMTP case. 1450 ** If we got a temporary failure, arrange to queue the 1451 ** addressees. 1452 */ 1453 1454 give_up: 1455 if (tobuf[0] != '\0') 1456 giveresponse(rcode, m, mci, ctladdr, e); 1457 for (to = tochain; to != NULL; to = to->q_tchain) 1458 { 1459 if (rcode != EX_OK) 1460 markfailure(e, to, rcode); 1461 else 1462 { 1463 to->q_flags |= QSENT; 1464 e->e_nsent++; 1465 if (e->e_receiptto != NULL && 1466 bitnset(M_LOCALMAILER, m->m_flags)) 1467 { 1468 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1469 to->q_paddr); 1470 } 1471 } 1472 } 1473 1474 /* 1475 ** Restore state and return. 1476 */ 1477 1478 #ifdef XDEBUG 1479 { 1480 char wbuf[MAXLINE]; 1481 1482 /* make absolutely certain 0, 1, and 2 are in use */ 1483 sprintf(wbuf, "%s... end of deliver(%s)", 1484 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1485 m->m_name); 1486 checkfd012(wbuf); 1487 } 1488 #endif 1489 1490 errno = 0; 1491 define('g', (char *) NULL, e); 1492 return (rcode); 1493 } 1494 /* 1495 ** MARKFAILURE -- mark a failure on a specific address. 1496 ** 1497 ** Parameters: 1498 ** e -- the envelope we are sending. 1499 ** q -- the address to mark. 1500 ** rcode -- the code signifying the particular failure. 1501 ** 1502 ** Returns: 1503 ** none. 1504 ** 1505 ** Side Effects: 1506 ** marks the address (and possibly the envelope) with the 1507 ** failure so that an error will be returned or 1508 ** the message will be queued, as appropriate. 1509 */ 1510 1511 markfailure(e, q, rcode) 1512 register ENVELOPE *e; 1513 register ADDRESS *q; 1514 int rcode; 1515 { 1516 char buf[MAXLINE]; 1517 1518 switch (rcode) 1519 { 1520 case EX_OK: 1521 break; 1522 1523 case EX_TEMPFAIL: 1524 case EX_IOERR: 1525 case EX_OSERR: 1526 q->q_flags |= QQUEUEUP; 1527 break; 1528 1529 default: 1530 q->q_flags |= QBADADDR; 1531 break; 1532 } 1533 } 1534 /* 1535 ** ENDMAILER -- Wait for mailer to terminate. 1536 ** 1537 ** We should never get fatal errors (e.g., segmentation 1538 ** violation), so we report those specially. For other 1539 ** errors, we choose a status message (into statmsg), 1540 ** and if it represents an error, we print it. 1541 ** 1542 ** Parameters: 1543 ** pid -- pid of mailer. 1544 ** e -- the current envelope. 1545 ** pv -- the parameter vector that invoked the mailer 1546 ** (for error messages). 1547 ** 1548 ** Returns: 1549 ** exit code of mailer. 1550 ** 1551 ** Side Effects: 1552 ** none. 1553 */ 1554 1555 endmailer(mci, e, pv) 1556 register MCI *mci; 1557 register ENVELOPE *e; 1558 char **pv; 1559 { 1560 int st; 1561 1562 /* close any connections */ 1563 if (mci->mci_in != NULL) 1564 (void) xfclose(mci->mci_in, mci->mci_mailer->m_name, "mci_in"); 1565 if (mci->mci_out != NULL) 1566 (void) xfclose(mci->mci_out, mci->mci_mailer->m_name, "mci_out"); 1567 mci->mci_in = mci->mci_out = NULL; 1568 mci->mci_state = MCIS_CLOSED; 1569 1570 /* in the IPC case there is nothing to wait for */ 1571 if (mci->mci_pid == 0) 1572 return (EX_OK); 1573 1574 /* wait for the mailer process to die and collect status */ 1575 st = waitfor(mci->mci_pid); 1576 if (st == -1) 1577 { 1578 syserr("endmailer %s: wait", pv[0]); 1579 return (EX_SOFTWARE); 1580 } 1581 1582 if (WIFEXITED(st)) 1583 { 1584 /* normal death -- return status */ 1585 return (WEXITSTATUS(st)); 1586 } 1587 1588 /* it died a horrid death */ 1589 syserr("451 mailer %s died with signal %o", 1590 mci->mci_mailer->m_name, st); 1591 1592 /* log the arguments */ 1593 if (pv != NULL && e->e_xfp != NULL) 1594 { 1595 register char **av; 1596 1597 fprintf(e->e_xfp, "Arguments:"); 1598 for (av = pv; *av != NULL; av++) 1599 fprintf(e->e_xfp, " %s", *av); 1600 fprintf(e->e_xfp, "\n"); 1601 } 1602 1603 ExitStat = EX_TEMPFAIL; 1604 return (EX_TEMPFAIL); 1605 } 1606 /* 1607 ** GIVERESPONSE -- Interpret an error response from a mailer 1608 ** 1609 ** Parameters: 1610 ** stat -- the status code from the mailer (high byte 1611 ** only; core dumps must have been taken care of 1612 ** already). 1613 ** m -- the mailer info for this mailer. 1614 ** mci -- the mailer connection info -- can be NULL if the 1615 ** response is given before the connection is made. 1616 ** ctladdr -- the controlling address for the recipient 1617 ** address(es). 1618 ** e -- the current envelope. 1619 ** 1620 ** Returns: 1621 ** none. 1622 ** 1623 ** Side Effects: 1624 ** Errors may be incremented. 1625 ** ExitStat may be set. 1626 */ 1627 1628 giveresponse(stat, m, mci, ctladdr, e) 1629 int stat; 1630 register MAILER *m; 1631 register MCI *mci; 1632 ADDRESS *ctladdr; 1633 ENVELOPE *e; 1634 { 1635 register const char *statmsg; 1636 extern char *SysExMsg[]; 1637 register int i; 1638 extern int N_SysEx; 1639 char buf[MAXLINE]; 1640 1641 /* 1642 ** Compute status message from code. 1643 */ 1644 1645 i = stat - EX__BASE; 1646 if (stat == 0) 1647 { 1648 statmsg = "250 Sent"; 1649 if (e->e_statmsg != NULL) 1650 { 1651 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1652 statmsg = buf; 1653 } 1654 } 1655 else if (i < 0 || i > N_SysEx) 1656 { 1657 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1658 stat = EX_UNAVAILABLE; 1659 statmsg = buf; 1660 } 1661 else if (stat == EX_TEMPFAIL) 1662 { 1663 (void) strcpy(buf, SysExMsg[i] + 1); 1664 #ifdef NAMED_BIND 1665 if (h_errno == TRY_AGAIN) 1666 statmsg = errstring(h_errno+E_DNSBASE); 1667 else 1668 #endif 1669 { 1670 if (errno != 0) 1671 statmsg = errstring(errno); 1672 else 1673 { 1674 #ifdef SMTP 1675 statmsg = SmtpError; 1676 #else /* SMTP */ 1677 statmsg = NULL; 1678 #endif /* SMTP */ 1679 } 1680 } 1681 if (statmsg != NULL && statmsg[0] != '\0') 1682 { 1683 (void) strcat(buf, ": "); 1684 (void) strcat(buf, statmsg); 1685 } 1686 statmsg = buf; 1687 } 1688 #ifdef NAMED_BIND 1689 else if (stat == EX_NOHOST && h_errno != 0) 1690 { 1691 statmsg = errstring(h_errno + E_DNSBASE); 1692 (void) sprintf(buf, "%s (%s)", SysExMsg[i], statmsg); 1693 statmsg = buf; 1694 } 1695 #endif 1696 else 1697 { 1698 statmsg = SysExMsg[i]; 1699 if (*statmsg++ == ':') 1700 { 1701 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1702 statmsg = buf; 1703 } 1704 } 1705 1706 /* 1707 ** Print the message as appropriate 1708 */ 1709 1710 if (stat == EX_OK || stat == EX_TEMPFAIL) 1711 { 1712 extern char MsgBuf[]; 1713 1714 message(&statmsg[4], errstring(errno)); 1715 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1716 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1717 } 1718 else 1719 { 1720 Errors++; 1721 usrerr(statmsg, errstring(errno)); 1722 } 1723 1724 /* 1725 ** Final cleanup. 1726 ** Log a record of the transaction. Compute the new 1727 ** ExitStat -- if we already had an error, stick with 1728 ** that. 1729 */ 1730 1731 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1732 logdelivery(m, mci, &statmsg[4], ctladdr, e); 1733 1734 if (stat != EX_TEMPFAIL) 1735 setstat(stat); 1736 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1737 { 1738 if (e->e_message != NULL) 1739 free(e->e_message); 1740 e->e_message = newstr(&statmsg[4]); 1741 } 1742 errno = 0; 1743 #ifdef NAMED_BIND 1744 h_errno = 0; 1745 #endif 1746 } 1747 /* 1748 ** LOGDELIVERY -- log the delivery in the system log 1749 ** 1750 ** Care is taken to avoid logging lines that are too long, because 1751 ** some versions of syslog have an unfortunate proclivity for core 1752 ** dumping. This is a hack, to be sure, that is at best empirical. 1753 ** 1754 ** Parameters: 1755 ** m -- the mailer info. Can be NULL for initial queue. 1756 ** mci -- the mailer connection info -- can be NULL if the 1757 ** log is occuring when no connection is active. 1758 ** stat -- the message to print for the status. 1759 ** ctladdr -- the controlling address for the to list. 1760 ** e -- the current envelope. 1761 ** 1762 ** Returns: 1763 ** none 1764 ** 1765 ** Side Effects: 1766 ** none 1767 */ 1768 1769 logdelivery(m, mci, stat, ctladdr, e) 1770 MAILER *m; 1771 register MCI *mci; 1772 char *stat; 1773 ADDRESS *ctladdr; 1774 register ENVELOPE *e; 1775 { 1776 # ifdef LOG 1777 register char *bp; 1778 register char *p; 1779 int l; 1780 char buf[512]; 1781 1782 # if (SYSLOG_BUFSIZE) >= 256 1783 bp = buf; 1784 if (ctladdr != NULL) 1785 { 1786 strcpy(bp, ", ctladdr="); 1787 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 1788 bp += strlen(bp); 1789 if (bitset(QGOODUID, ctladdr->q_flags)) 1790 { 1791 (void) sprintf(bp, " (%d/%d)", 1792 ctladdr->q_uid, ctladdr->q_gid); 1793 bp += strlen(bp); 1794 } 1795 } 1796 1797 (void) sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1798 bp += strlen(bp); 1799 1800 if (m != NULL) 1801 { 1802 (void) strcpy(bp, ", mailer="); 1803 (void) strcat(bp, m->m_name); 1804 bp += strlen(bp); 1805 } 1806 1807 if (mci != NULL && mci->mci_host != NULL) 1808 { 1809 # ifdef DAEMON 1810 extern SOCKADDR CurHostAddr; 1811 # endif 1812 1813 (void) strcpy(bp, ", relay="); 1814 (void) strcat(bp, mci->mci_host); 1815 1816 # ifdef DAEMON 1817 (void) strcat(bp, " ["); 1818 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 1819 (void) strcat(bp, "]"); 1820 # endif 1821 } 1822 else 1823 { 1824 char *p = macvalue('h', e); 1825 1826 if (p != NULL && p[0] != '\0') 1827 { 1828 (void) strcpy(bp, ", relay="); 1829 (void) strcat(bp, p); 1830 } 1831 } 1832 bp += strlen(bp); 1833 1834 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 1835 #if (STATLEN) < 63 1836 # undef STATLEN 1837 # define STATLEN 63 1838 #endif 1839 #if (STATLEN) > 203 1840 # undef STATLEN 1841 # define STATLEN 203 1842 #endif 1843 1844 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 1845 { 1846 /* desperation move -- truncate data */ 1847 bp = buf + sizeof buf - ((STATLEN) + 17); 1848 strcpy(bp, "..."); 1849 bp += 3; 1850 } 1851 1852 (void) strcpy(bp, ", stat="); 1853 bp += strlen(bp); 1854 1855 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 1856 1857 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 1858 p = e->e_to; 1859 while (strlen(p) >= l) 1860 { 1861 register char *q = strchr(p + l, ','); 1862 1863 if (q == NULL) 1864 break; 1865 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 1866 e->e_id, ++q - p, p, buf); 1867 p = q; 1868 } 1869 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 1870 1871 # else /* we have a very short log buffer size */ 1872 1873 l = SYSLOG_BUFSIZE - 85; 1874 p = e->e_to; 1875 while (strlen(p) >= l) 1876 { 1877 register char *q = strchr(p + l, ','); 1878 1879 if (q == NULL) 1880 break; 1881 syslog(LOG_INFO, "%s: to=%.*s [more]", 1882 e->e_id, ++q - p, p); 1883 p = q; 1884 } 1885 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 1886 1887 if (ctladdr != NULL) 1888 { 1889 bp = buf; 1890 strcpy(buf, "ctladdr="); 1891 bp += strlen(buf); 1892 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 1893 bp += strlen(buf); 1894 if (bitset(QGOODUID, ctladdr->q_flags)) 1895 { 1896 (void) sprintf(bp, " (%d/%d)", 1897 ctladdr->q_uid, ctladdr->q_gid); 1898 bp += strlen(bp); 1899 } 1900 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1901 } 1902 bp = buf; 1903 sprintf(bp, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1904 bp += strlen(bp); 1905 1906 if (m != NULL) 1907 { 1908 sprintf(bp, ", mailer=%s", m->m_name); 1909 bp += strlen(bp); 1910 } 1911 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1912 1913 buf[0] = '\0'; 1914 if (mci != NULL && mci->mci_host != NULL) 1915 { 1916 # ifdef DAEMON 1917 extern SOCKADDR CurHostAddr; 1918 # endif 1919 1920 sprintf(buf, "relay=%s", mci->mci_host); 1921 1922 # ifdef DAEMON 1923 (void) strcat(buf, " ["); 1924 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 1925 (void) strcat(buf, "]"); 1926 # endif 1927 } 1928 else 1929 { 1930 char *p = macvalue('h', e); 1931 1932 if (p != NULL && p[0] != '\0') 1933 sprintf(buf, "relay=%s", p); 1934 } 1935 if (buf[0] != '\0') 1936 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1937 1938 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 1939 # endif /* short log buffer */ 1940 # endif /* LOG */ 1941 } 1942 /* 1943 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1944 ** 1945 ** This can be made an arbitrary message separator by changing $l 1946 ** 1947 ** One of the ugliest hacks seen by human eyes is contained herein: 1948 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1949 ** does a well-meaning programmer such as myself have to deal with 1950 ** this kind of antique garbage???? 1951 ** 1952 ** Parameters: 1953 ** mci -- the connection information. 1954 ** e -- the envelope. 1955 ** 1956 ** Returns: 1957 ** none 1958 ** 1959 ** Side Effects: 1960 ** outputs some text to fp. 1961 */ 1962 1963 putfromline(mci, e) 1964 register MCI *mci; 1965 ENVELOPE *e; 1966 { 1967 char *template = "\201l\n"; 1968 char buf[MAXLINE]; 1969 1970 if (bitnset(M_NHDR, mci->mci_mailer->m_flags)) 1971 return; 1972 1973 # ifdef UGLYUUCP 1974 if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags)) 1975 { 1976 char *bang; 1977 char xbuf[MAXLINE]; 1978 1979 expand("\201g", buf, &buf[sizeof buf - 1], e); 1980 bang = strchr(buf, '!'); 1981 if (bang == NULL) 1982 { 1983 errno = 0; 1984 syserr("554 No ! in UUCP From address! (%s given)", buf); 1985 } 1986 else 1987 { 1988 *bang++ = '\0'; 1989 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1990 template = xbuf; 1991 } 1992 } 1993 # endif /* UGLYUUCP */ 1994 expand(template, buf, &buf[sizeof buf - 1], e); 1995 putline(buf, mci); 1996 } 1997 /* 1998 ** PUTBODY -- put the body of a message. 1999 ** 2000 ** Parameters: 2001 ** mci -- the connection information. 2002 ** e -- the envelope to put out. 2003 ** separator -- if non-NULL, a message separator that must 2004 ** not be permitted in the resulting message. 2005 ** 2006 ** Returns: 2007 ** none. 2008 ** 2009 ** Side Effects: 2010 ** The message is written onto fp. 2011 */ 2012 2013 putbody(mci, e, separator) 2014 register MCI *mci; 2015 register ENVELOPE *e; 2016 char *separator; 2017 { 2018 char buf[MAXLINE]; 2019 2020 /* 2021 ** Output the body of the message 2022 */ 2023 2024 if (e->e_dfp == NULL) 2025 { 2026 if (e->e_df != NULL) 2027 { 2028 e->e_dfp = fopen(e->e_df, "r"); 2029 if (e->e_dfp == NULL) 2030 syserr("putbody: Cannot open %s for %s from %s", 2031 e->e_df, e->e_to, e->e_from.q_paddr); 2032 } 2033 else 2034 putline("<<< No Message Collected >>>", mci); 2035 } 2036 if (e->e_dfp != NULL) 2037 { 2038 rewind(e->e_dfp); 2039 while (!ferror(mci->mci_out) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 2040 { 2041 if (buf[0] == 'F' && 2042 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) && 2043 strncmp(buf, "From ", 5) == 0) 2044 (void) putc('>', mci->mci_out); 2045 if (buf[0] == '-' && buf[1] == '-' && separator != NULL) 2046 { 2047 /* possible separator */ 2048 int sl = strlen(separator); 2049 2050 if (strncmp(&buf[2], separator, sl) == 0) 2051 (void) putc(' ', mci->mci_out); 2052 } 2053 putline(buf, mci); 2054 } 2055 2056 if (ferror(e->e_dfp)) 2057 { 2058 syserr("putbody: %s: read error", e->e_df); 2059 ExitStat = EX_IOERR; 2060 } 2061 } 2062 2063 /* some mailers want extra blank line at end of message */ 2064 if (bitnset(M_BLANKEND, mci->mci_mailer->m_flags) && 2065 buf[0] != '\0' && buf[0] != '\n') 2066 putline("", mci); 2067 2068 (void) fflush(mci->mci_out); 2069 if (ferror(mci->mci_out) && errno != EPIPE) 2070 { 2071 syserr("putbody: write error"); 2072 ExitStat = EX_IOERR; 2073 } 2074 errno = 0; 2075 } 2076 /* 2077 ** MAILFILE -- Send a message to a file. 2078 ** 2079 ** If the file has the setuid/setgid bits set, but NO execute 2080 ** bits, sendmail will try to become the owner of that file 2081 ** rather than the real user. Obviously, this only works if 2082 ** sendmail runs as root. 2083 ** 2084 ** This could be done as a subordinate mailer, except that it 2085 ** is used implicitly to save messages in ~/dead.letter. We 2086 ** view this as being sufficiently important as to include it 2087 ** here. For example, if the system is dying, we shouldn't have 2088 ** to create another process plus some pipes to save the message. 2089 ** 2090 ** Parameters: 2091 ** filename -- the name of the file to send to. 2092 ** ctladdr -- the controlling address header -- includes 2093 ** the userid/groupid to be when sending. 2094 ** 2095 ** Returns: 2096 ** The exit code associated with the operation. 2097 ** 2098 ** Side Effects: 2099 ** none. 2100 */ 2101 2102 mailfile(filename, ctladdr, e) 2103 char *filename; 2104 ADDRESS *ctladdr; 2105 register ENVELOPE *e; 2106 { 2107 register FILE *f; 2108 register int pid; 2109 int mode; 2110 2111 if (tTd(11, 1)) 2112 { 2113 printf("mailfile %s\n ctladdr=", filename); 2114 printaddr(ctladdr, FALSE); 2115 } 2116 2117 if (e->e_xfp != NULL) 2118 fflush(e->e_xfp); 2119 2120 /* 2121 ** Fork so we can change permissions here. 2122 ** Note that we MUST use fork, not vfork, because of 2123 ** the complications of calling subroutines, etc. 2124 */ 2125 2126 DOFORK(fork); 2127 2128 if (pid < 0) 2129 return (EX_OSERR); 2130 else if (pid == 0) 2131 { 2132 /* child -- actually write to file */ 2133 struct stat stb; 2134 MCI mcibuf; 2135 2136 (void) setsignal(SIGINT, SIG_DFL); 2137 (void) setsignal(SIGHUP, SIG_DFL); 2138 (void) setsignal(SIGTERM, SIG_DFL); 2139 (void) umask(OldUmask); 2140 2141 if (stat(filename, &stb) < 0) 2142 stb.st_mode = FileMode; 2143 mode = stb.st_mode; 2144 2145 /* limit the errors to those actually caused in the child */ 2146 errno = 0; 2147 ExitStat = EX_OK; 2148 2149 if (bitset(0111, stb.st_mode)) 2150 exit(EX_CANTCREAT); 2151 if (ctladdr != NULL) 2152 { 2153 /* ignore setuid and setgid bits */ 2154 mode &= ~(S_ISGID|S_ISUID); 2155 } 2156 2157 /* we have to open the dfile BEFORE setuid */ 2158 if (e->e_dfp == NULL && e->e_df != NULL) 2159 { 2160 e->e_dfp = fopen(e->e_df, "r"); 2161 if (e->e_dfp == NULL) 2162 { 2163 syserr("mailfile: Cannot open %s for %s from %s", 2164 e->e_df, e->e_to, e->e_from.q_paddr); 2165 } 2166 } 2167 2168 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 2169 { 2170 if (ctladdr == NULL || ctladdr->q_uid == 0) 2171 { 2172 (void) initgroups(DefUser, DefGid); 2173 } 2174 else 2175 { 2176 (void) initgroups(ctladdr->q_ruser ? 2177 ctladdr->q_ruser : ctladdr->q_user, 2178 ctladdr->q_gid); 2179 } 2180 } 2181 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 2182 { 2183 if (ctladdr == NULL || ctladdr->q_uid == 0) 2184 (void) setuid(DefUid); 2185 else 2186 (void) setuid(ctladdr->q_uid); 2187 } 2188 FileName = filename; 2189 LineNumber = 0; 2190 f = dfopen(filename, O_WRONLY|O_CREAT|O_APPEND, FileMode); 2191 if (f == NULL) 2192 { 2193 message("554 cannot open: %s", errstring(errno)); 2194 exit(EX_CANTCREAT); 2195 } 2196 2197 bzero(&mcibuf, sizeof mcibuf); 2198 mcibuf.mci_mailer = FileMailer; 2199 mcibuf.mci_out = f; 2200 if (bitnset(M_7BITS, FileMailer->m_flags)) 2201 mcibuf.mci_flags |= MCIF_7BIT; 2202 2203 putfromline(&mcibuf, e); 2204 (*e->e_puthdr)(&mcibuf, e); 2205 putline("\n", &mcibuf); 2206 (*e->e_putbody)(&mcibuf, e, NULL); 2207 putline("\n", &mcibuf); 2208 if (ferror(f)) 2209 { 2210 message("451 I/O error: %s", errstring(errno)); 2211 setstat(EX_IOERR); 2212 } 2213 (void) xfclose(f, "mailfile", filename); 2214 (void) fflush(stdout); 2215 2216 /* reset ISUID & ISGID bits for paranoid systems */ 2217 (void) chmod(filename, (int) stb.st_mode); 2218 exit(ExitStat); 2219 /*NOTREACHED*/ 2220 } 2221 else 2222 { 2223 /* parent -- wait for exit status */ 2224 int st; 2225 2226 st = waitfor(pid); 2227 if (WIFEXITED(st)) 2228 return (WEXITSTATUS(st)); 2229 else 2230 { 2231 syserr("child died on signal %d", st); 2232 return (EX_UNAVAILABLE); 2233 } 2234 /*NOTREACHED*/ 2235 } 2236 } 2237 /* 2238 ** HOSTSIGNATURE -- return the "signature" for a host. 2239 ** 2240 ** The signature describes how we are going to send this -- it 2241 ** can be just the hostname (for non-Internet hosts) or can be 2242 ** an ordered list of MX hosts. 2243 ** 2244 ** Parameters: 2245 ** m -- the mailer describing this host. 2246 ** host -- the host name. 2247 ** e -- the current envelope. 2248 ** 2249 ** Returns: 2250 ** The signature for this host. 2251 ** 2252 ** Side Effects: 2253 ** Can tweak the symbol table. 2254 */ 2255 2256 char * 2257 hostsignature(m, host, e) 2258 register MAILER *m; 2259 char *host; 2260 ENVELOPE *e; 2261 { 2262 register char *p; 2263 register STAB *s; 2264 int i; 2265 int len; 2266 #ifdef NAMED_BIND 2267 int nmx; 2268 auto int rcode; 2269 char *hp; 2270 char *endp; 2271 int oldoptions; 2272 char *mxhosts[MAXMXHOSTS + 1]; 2273 #endif 2274 2275 /* 2276 ** Check to see if this uses IPC -- if not, it can't have MX records. 2277 */ 2278 2279 p = m->m_mailer; 2280 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2281 { 2282 /* just an ordinary mailer */ 2283 return host; 2284 } 2285 2286 /* 2287 ** Look it up in the symbol table. 2288 */ 2289 2290 s = stab(host, ST_HOSTSIG, ST_ENTER); 2291 if (s->s_hostsig != NULL) 2292 return s->s_hostsig; 2293 2294 /* 2295 ** Not already there -- create a signature. 2296 */ 2297 2298 #ifdef NAMED_BIND 2299 if (ConfigLevel < 2) 2300 { 2301 oldoptions = _res.options; 2302 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2303 } 2304 2305 for (hp = host; hp != NULL; hp = endp) 2306 { 2307 endp = strchr(hp, ':'); 2308 if (endp != NULL) 2309 *endp = '\0'; 2310 2311 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2312 2313 if (nmx <= 0) 2314 { 2315 register MCI *mci; 2316 2317 /* update the connection info for this host */ 2318 mci = mci_get(hp, m); 2319 mci->mci_exitstat = rcode; 2320 mci->mci_errno = errno; 2321 #ifdef NAMED_BIND 2322 mci->mci_herrno = h_errno; 2323 #endif 2324 2325 /* and return the original host name as the signature */ 2326 nmx = 1; 2327 mxhosts[0] = hp; 2328 } 2329 2330 len = 0; 2331 for (i = 0; i < nmx; i++) 2332 { 2333 len += strlen(mxhosts[i]) + 1; 2334 } 2335 if (s->s_hostsig != NULL) 2336 len += strlen(s->s_hostsig) + 1; 2337 p = xalloc(len); 2338 if (s->s_hostsig != NULL) 2339 { 2340 (void) strcpy(p, s->s_hostsig); 2341 free(s->s_hostsig); 2342 s->s_hostsig = p; 2343 p += strlen(p); 2344 *p++ = ':'; 2345 } 2346 else 2347 s->s_hostsig = p; 2348 for (i = 0; i < nmx; i++) 2349 { 2350 if (i != 0) 2351 *p++ = ':'; 2352 strcpy(p, mxhosts[i]); 2353 p += strlen(p); 2354 } 2355 if (endp != NULL) 2356 *endp++ = ':'; 2357 } 2358 makelower(s->s_hostsig); 2359 if (ConfigLevel < 2) 2360 _res.options = oldoptions; 2361 #else 2362 /* not using BIND -- the signature is just the host name */ 2363 s->s_hostsig = host; 2364 #endif 2365 if (tTd(17, 1)) 2366 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2367 return s->s_hostsig; 2368 } 2369