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 8.83 (Berkeley) 04/29/94"; 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|EF_SENDRECEIPT); 210 ee->e_flags |= EF_NORECEIPT; 211 setsender(owner, ee, NULL, TRUE); 212 if (tTd(13, 5)) 213 { 214 printf("sendall(split): QDONTSEND "); 215 printaddr(&ee->e_from, FALSE); 216 } 217 ee->e_from.q_flags |= QDONTSEND; 218 ee->e_dfp = NULL; 219 ee->e_xfp = NULL; 220 ee->e_df = NULL; 221 ee->e_errormode = EM_MAIL; 222 ee->e_sibling = splitenv; 223 splitenv = ee; 224 225 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 226 if (q->q_owner == owner) 227 { 228 q->q_flags |= QDONTSEND; 229 q->q_flags &= ~QQUEUEUP; 230 } 231 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 232 if (q->q_owner != owner) 233 { 234 q->q_flags |= QDONTSEND; 235 q->q_flags &= ~QQUEUEUP; 236 } 237 238 if (e->e_df != NULL && mode != SM_VERIFY) 239 { 240 ee->e_dfp = NULL; 241 ee->e_df = queuename(ee, 'd'); 242 ee->e_df = newstr(ee->e_df); 243 if (link(e->e_df, ee->e_df) < 0) 244 { 245 syserr("sendall: link(%s, %s)", 246 e->e_df, ee->e_df); 247 } 248 } 249 #ifdef LOG 250 if (LogLevel > 4) 251 syslog(LOG_INFO, "%s: clone %s, owner=%s", 252 ee->e_id, e->e_id, owner); 253 #endif 254 } 255 } 256 257 if (owner != NULL) 258 { 259 setsender(owner, e, NULL, TRUE); 260 if (tTd(13, 5)) 261 { 262 printf("sendall(owner): QDONTSEND "); 263 printaddr(&e->e_from, FALSE); 264 } 265 e->e_from.q_flags |= QDONTSEND; 266 e->e_errormode = EM_MAIL; 267 e->e_flags |= EF_NORECEIPT; 268 } 269 270 # ifdef QUEUE 271 if ((mode == SM_QUEUE || mode == SM_FORK || 272 (mode != SM_VERIFY && SuperSafe)) && 273 !bitset(EF_INQUEUE, e->e_flags)) 274 { 275 /* be sure everything is instantiated in the queue */ 276 queueup(e, TRUE, announcequeueup); 277 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 278 queueup(ee, TRUE, announcequeueup); 279 } 280 #endif /* QUEUE */ 281 282 if (splitenv != NULL) 283 { 284 if (tTd(13, 1)) 285 { 286 printf("\nsendall: Split queue; remaining queue:\n"); 287 printaddr(e->e_sendqueue, TRUE); 288 } 289 290 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 291 { 292 CurEnv = ee; 293 if (mode != SM_VERIFY) 294 openxscript(ee); 295 sendenvelope(ee, mode); 296 dropenvelope(ee); 297 } 298 299 CurEnv = e; 300 } 301 sendenvelope(e, mode); 302 } 303 304 sendenvelope(e, mode) 305 register ENVELOPE *e; 306 char mode; 307 { 308 bool oldverbose; 309 int pid; 310 register ADDRESS *q; 311 char *qf; 312 char *id; 313 314 /* 315 ** If we have had global, fatal errors, don't bother sending 316 ** the message at all if we are in SMTP mode. Local errors 317 ** (e.g., a single address failing) will still cause the other 318 ** addresses to be sent. 319 */ 320 321 if (bitset(EF_FATALERRS, e->e_flags) && 322 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 323 { 324 e->e_flags |= EF_CLRQUEUE; 325 return; 326 } 327 328 oldverbose = Verbose; 329 switch (mode) 330 { 331 case SM_VERIFY: 332 Verbose = TRUE; 333 break; 334 335 case SM_QUEUE: 336 queueonly: 337 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 338 return; 339 340 case SM_FORK: 341 if (e->e_xfp != NULL) 342 (void) fflush(e->e_xfp); 343 344 # if !HASFLOCK 345 /* 346 ** Since fcntl locking has the interesting semantic that 347 ** the lock is owned by a process, not by an open file 348 ** descriptor, we have to flush this to the queue, and 349 ** then restart from scratch in the child. 350 */ 351 352 /* save id for future use */ 353 id = e->e_id; 354 355 /* now drop the envelope in the parent */ 356 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 357 dropenvelope(e); 358 359 /* and reacquire in the child */ 360 (void) dowork(id, TRUE, FALSE, e); 361 362 return; 363 364 # else /* HASFLOCK */ 365 366 pid = fork(); 367 if (pid < 0) 368 { 369 goto queueonly; 370 } 371 else if (pid > 0) 372 { 373 /* be sure we leave the temp files to our child */ 374 /* can't call unlockqueue to avoid unlink of xfp */ 375 if (e->e_lockfp != NULL) 376 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 377 e->e_lockfp = NULL; 378 379 /* close any random open files in the envelope */ 380 closexscript(e); 381 if (e->e_dfp != NULL) 382 (void) xfclose(e->e_dfp, "sendenvelope", e->e_df); 383 e->e_dfp = NULL; 384 e->e_id = e->e_df = NULL; 385 386 /* catch intermediate zombie */ 387 (void) waitfor(pid); 388 return; 389 } 390 391 /* double fork to avoid zombies */ 392 pid = fork(); 393 if (pid > 0) 394 exit(EX_OK); 395 396 /* be sure we are immune from the terminal */ 397 disconnect(1, e); 398 399 /* prevent parent from waiting if there was an error */ 400 if (pid < 0) 401 { 402 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 403 finis(); 404 } 405 406 /* 407 ** Close any cached connections. 408 ** 409 ** We don't send the QUIT protocol because the parent 410 ** still knows about the connection. 411 ** 412 ** This should only happen when delivering an error 413 ** message. 414 */ 415 416 mci_flush(FALSE, NULL); 417 418 # endif /* HASFLOCK */ 419 420 break; 421 } 422 423 /* 424 ** Run through the list and send everything. 425 ** 426 ** Set EF_GLOBALERRS so that error messages during delivery 427 ** result in returned mail. 428 */ 429 430 e->e_nsent = 0; 431 e->e_flags |= EF_GLOBALERRS; 432 433 /* now run through the queue */ 434 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 435 { 436 #ifdef XDEBUG 437 char wbuf[MAXNAME + 20]; 438 439 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 440 checkfd012(wbuf); 441 #endif 442 if (mode == SM_VERIFY) 443 { 444 e->e_to = q->q_paddr; 445 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 446 { 447 if (q->q_host != NULL && q->q_host[0] != '\0') 448 message("deliverable: mailer %s, host %s, user %s", 449 q->q_mailer->m_name, 450 q->q_host, 451 q->q_user); 452 else 453 message("deliverable: mailer %s, user %s", 454 q->q_mailer->m_name, 455 q->q_user); 456 } 457 } 458 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 459 { 460 # ifdef QUEUE 461 /* 462 ** Checkpoint the send list every few addresses 463 */ 464 465 if (e->e_nsent >= CheckpointInterval) 466 { 467 queueup(e, TRUE, FALSE); 468 e->e_nsent = 0; 469 } 470 # endif /* QUEUE */ 471 (void) deliver(e, q); 472 } 473 } 474 Verbose = oldverbose; 475 476 #ifdef XDEBUG 477 checkfd012("end of sendenvelope"); 478 #endif 479 480 if (mode == SM_FORK) 481 finis(); 482 } 483 /* 484 ** DOFORK -- do a fork, retrying a couple of times on failure. 485 ** 486 ** This MUST be a macro, since after a vfork we are running 487 ** two processes on the same stack!!! 488 ** 489 ** Parameters: 490 ** none. 491 ** 492 ** Returns: 493 ** From a macro??? You've got to be kidding! 494 ** 495 ** Side Effects: 496 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 497 ** pid of child in parent, zero in child. 498 ** -1 on unrecoverable error. 499 ** 500 ** Notes: 501 ** I'm awfully sorry this looks so awful. That's 502 ** vfork for you..... 503 */ 504 505 # define NFORKTRIES 5 506 507 # ifndef FORK 508 # define FORK fork 509 # endif 510 511 # define DOFORK(fORKfN) \ 512 {\ 513 register int i;\ 514 \ 515 for (i = NFORKTRIES; --i >= 0; )\ 516 {\ 517 pid = fORKfN();\ 518 if (pid >= 0)\ 519 break;\ 520 if (i > 0)\ 521 sleep((unsigned) NFORKTRIES - i);\ 522 }\ 523 } 524 /* 525 ** DOFORK -- simple fork interface to DOFORK. 526 ** 527 ** Parameters: 528 ** none. 529 ** 530 ** Returns: 531 ** pid of child in parent. 532 ** zero in child. 533 ** -1 on error. 534 ** 535 ** Side Effects: 536 ** returns twice, once in parent and once in child. 537 */ 538 539 dofork() 540 { 541 register int pid; 542 543 DOFORK(fork); 544 return (pid); 545 } 546 /* 547 ** DELIVER -- Deliver a message to a list of addresses. 548 ** 549 ** This routine delivers to everyone on the same host as the 550 ** user on the head of the list. It is clever about mailers 551 ** that don't handle multiple users. It is NOT guaranteed 552 ** that it will deliver to all these addresses however -- so 553 ** deliver should be called once for each address on the 554 ** list. 555 ** 556 ** Parameters: 557 ** e -- the envelope to deliver. 558 ** firstto -- head of the address list to deliver to. 559 ** 560 ** Returns: 561 ** zero -- successfully delivered. 562 ** else -- some failure, see ExitStat for more info. 563 ** 564 ** Side Effects: 565 ** The standard input is passed off to someone. 566 */ 567 568 deliver(e, firstto) 569 register ENVELOPE *e; 570 ADDRESS *firstto; 571 { 572 char *host; /* host being sent to */ 573 char *user; /* user being sent to */ 574 char **pvp; 575 register char **mvp; 576 register char *p; 577 register MAILER *m; /* mailer for this recipient */ 578 ADDRESS *ctladdr; 579 register MCI *mci; 580 register ADDRESS *to = firstto; 581 bool clever = FALSE; /* running user smtp to this mailer */ 582 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 583 int rcode; /* response code */ 584 char *firstsig; /* signature of firstto */ 585 int pid; 586 char *curhost; 587 int mpvect[2]; 588 int rpvect[2]; 589 char *pv[MAXPV+1]; 590 char tobuf[TOBUFSIZE]; /* text line of to people */ 591 char buf[MAXNAME]; 592 char rpathbuf[MAXNAME]; /* translated return path */ 593 extern int checkcompat(); 594 595 errno = 0; 596 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 597 return (0); 598 599 #if NAMED_BIND 600 /* unless interactive, try twice, over a minute */ 601 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) 602 { 603 _res.retrans = 30; 604 _res.retry = 2; 605 } 606 #endif 607 608 m = to->q_mailer; 609 host = to->q_host; 610 CurEnv = e; /* just in case */ 611 e->e_statmsg = NULL; 612 SmtpError[0] = '\0'; 613 614 if (tTd(10, 1)) 615 printf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n", 616 e->e_id, m->m_name, host, to->q_user); 617 if (tTd(10, 100)) 618 printopenfds(FALSE); 619 620 /* 621 ** If this mailer is expensive, and if we don't want to make 622 ** connections now, just mark these addresses and return. 623 ** This is useful if we want to batch connections to 624 ** reduce load. This will cause the messages to be 625 ** queued up, and a daemon will come along to send the 626 ** messages later. 627 ** This should be on a per-mailer basis. 628 */ 629 630 if (NoConnect && bitnset(M_EXPENSIVE, m->m_flags) && !Verbose) 631 { 632 for (; to != NULL; to = to->q_next) 633 { 634 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 635 to->q_mailer != m) 636 continue; 637 to->q_flags |= QQUEUEUP; 638 e->e_to = to->q_paddr; 639 message("queued"); 640 if (LogLevel > 8) 641 logdelivery(m, NULL, "queued", NULL, e); 642 } 643 e->e_to = NULL; 644 return (0); 645 } 646 647 /* 648 ** Do initial argv setup. 649 ** Insert the mailer name. Notice that $x expansion is 650 ** NOT done on the mailer name. Then, if the mailer has 651 ** a picky -f flag, we insert it as appropriate. This 652 ** code does not check for 'pv' overflow; this places a 653 ** manifest lower limit of 4 for MAXPV. 654 ** The from address rewrite is expected to make 655 ** the address relative to the other end. 656 */ 657 658 /* rewrite from address, using rewriting rules */ 659 rcode = EX_OK; 660 (void) strcpy(rpathbuf, remotename(e->e_from.q_paddr, m, 661 RF_SENDERADDR|RF_CANONICAL, 662 &rcode, e)); 663 define('g', rpathbuf, e); /* translated return path */ 664 define('h', host, e); /* to host */ 665 Errors = 0; 666 pvp = pv; 667 *pvp++ = m->m_argv[0]; 668 669 /* insert -f or -r flag as appropriate */ 670 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 671 { 672 if (bitnset(M_FOPT, m->m_flags)) 673 *pvp++ = "-f"; 674 else 675 *pvp++ = "-r"; 676 *pvp++ = newstr(rpathbuf); 677 } 678 679 /* 680 ** Append the other fixed parts of the argv. These run 681 ** up to the first entry containing "$u". There can only 682 ** be one of these, and there are only a few more slots 683 ** in the pv after it. 684 */ 685 686 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 687 { 688 /* can't use strchr here because of sign extension problems */ 689 while (*p != '\0') 690 { 691 if ((*p++ & 0377) == MACROEXPAND) 692 { 693 if (*p == 'u') 694 break; 695 } 696 } 697 698 if (*p != '\0') 699 break; 700 701 /* this entry is safe -- go ahead and process it */ 702 expand(*mvp, buf, &buf[sizeof buf - 1], e); 703 *pvp++ = newstr(buf); 704 if (pvp >= &pv[MAXPV - 3]) 705 { 706 syserr("554 Too many parameters to %s before $u", pv[0]); 707 return (-1); 708 } 709 } 710 711 /* 712 ** If we have no substitution for the user name in the argument 713 ** list, we know that we must supply the names otherwise -- and 714 ** SMTP is the answer!! 715 */ 716 717 if (*mvp == NULL) 718 { 719 /* running SMTP */ 720 # ifdef SMTP 721 clever = TRUE; 722 *pvp = NULL; 723 # else /* SMTP */ 724 /* oops! we don't implement SMTP */ 725 syserr("554 SMTP style mailer not implemented"); 726 return (EX_SOFTWARE); 727 # endif /* SMTP */ 728 } 729 730 /* 731 ** At this point *mvp points to the argument with $u. We 732 ** run through our address list and append all the addresses 733 ** we can. If we run out of space, do not fret! We can 734 ** always send another copy later. 735 */ 736 737 tobuf[0] = '\0'; 738 e->e_to = tobuf; 739 ctladdr = NULL; 740 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 741 for (; to != NULL; to = to->q_next) 742 { 743 /* avoid sending multiple recipients to dumb mailers */ 744 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 745 break; 746 747 /* if already sent or not for this host, don't send */ 748 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 749 to->q_mailer != firstto->q_mailer || 750 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 751 continue; 752 753 /* avoid overflowing tobuf */ 754 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 755 break; 756 757 if (tTd(10, 1)) 758 { 759 printf("\nsend to "); 760 printaddr(to, FALSE); 761 } 762 763 /* compute effective uid/gid when sending */ 764 /* XXX perhaps this should be to->q_mailer != LocalMailer ?? */ 765 /* XXX perhaps it should be a mailer flag? */ 766 if (to->q_mailer == ProgMailer || to->q_mailer == FileMailer) 767 ctladdr = getctladdr(to); 768 769 user = to->q_user; 770 e->e_to = to->q_paddr; 771 if (tTd(10, 5)) 772 { 773 printf("deliver: QDONTSEND "); 774 printaddr(to, FALSE); 775 } 776 to->q_flags |= QDONTSEND; 777 778 /* 779 ** Check to see that these people are allowed to 780 ** talk to each other. 781 */ 782 783 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 784 { 785 NoReturn = TRUE; 786 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 787 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, e); 788 continue; 789 } 790 rcode = checkcompat(to, e); 791 if (rcode != EX_OK) 792 { 793 markfailure(e, to, rcode); 794 giveresponse(rcode, m, NULL, ctladdr, e); 795 continue; 796 } 797 798 /* 799 ** Strip quote bits from names if the mailer is dumb 800 ** about them. 801 */ 802 803 if (bitnset(M_STRIPQ, m->m_flags)) 804 { 805 stripquotes(user); 806 stripquotes(host); 807 } 808 809 /* hack attack -- delivermail compatibility */ 810 if (m == ProgMailer && *user == '|') 811 user++; 812 813 /* 814 ** If an error message has already been given, don't 815 ** bother to send to this address. 816 ** 817 ** >>>>>>>>>> This clause assumes that the local mailer 818 ** >> NOTE >> cannot do any further aliasing; that 819 ** >>>>>>>>>> function is subsumed by sendmail. 820 */ 821 822 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 823 continue; 824 825 /* save statistics.... */ 826 markstats(e, to); 827 828 /* 829 ** See if this user name is "special". 830 ** If the user name has a slash in it, assume that this 831 ** is a file -- send it off without further ado. Note 832 ** that this type of addresses is not processed along 833 ** with the others, so we fudge on the To person. 834 */ 835 836 if (m == FileMailer) 837 { 838 rcode = mailfile(user, ctladdr, e); 839 giveresponse(rcode, m, NULL, ctladdr, e); 840 if (rcode == EX_OK) 841 to->q_flags |= QSENT; 842 continue; 843 } 844 845 /* 846 ** Address is verified -- add this user to mailer 847 ** argv, and add it to the print list of recipients. 848 */ 849 850 /* link together the chain of recipients */ 851 to->q_tchain = tochain; 852 tochain = to; 853 854 /* create list of users for error messages */ 855 (void) strcat(tobuf, ","); 856 (void) strcat(tobuf, to->q_paddr); 857 define('u', user, e); /* to user */ 858 p = to->q_home; 859 if (p == NULL && ctladdr != NULL) 860 p = ctladdr->q_home; 861 define('z', p, e); /* user's home */ 862 863 /* 864 ** Expand out this user into argument list. 865 */ 866 867 if (!clever) 868 { 869 expand(*mvp, buf, &buf[sizeof buf - 1], e); 870 *pvp++ = newstr(buf); 871 if (pvp >= &pv[MAXPV - 2]) 872 { 873 /* allow some space for trailing parms */ 874 break; 875 } 876 } 877 } 878 879 /* see if any addresses still exist */ 880 if (tobuf[0] == '\0') 881 { 882 define('g', (char *) NULL, e); 883 return (0); 884 } 885 886 /* print out messages as full list */ 887 e->e_to = tobuf + 1; 888 889 /* 890 ** Fill out any parameters after the $u parameter. 891 */ 892 893 while (!clever && *++mvp != NULL) 894 { 895 expand(*mvp, buf, &buf[sizeof buf - 1], e); 896 *pvp++ = newstr(buf); 897 if (pvp >= &pv[MAXPV]) 898 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 899 } 900 *pvp++ = NULL; 901 902 /* 903 ** Call the mailer. 904 ** The argument vector gets built, pipes 905 ** are created as necessary, and we fork & exec as 906 ** appropriate. 907 ** If we are running SMTP, we just need to clean up. 908 */ 909 910 /*XXX this seems a bit wierd */ 911 if (ctladdr == NULL && m != ProgMailer && 912 bitset(QGOODUID, e->e_from.q_flags)) 913 ctladdr = &e->e_from; 914 915 #if NAMED_BIND 916 if (ConfigLevel < 2) 917 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 918 #endif 919 920 if (tTd(11, 1)) 921 { 922 printf("openmailer:"); 923 printav(pv); 924 } 925 errno = 0; 926 927 CurHostName = m->m_mailer; 928 929 /* 930 ** Deal with the special case of mail handled through an IPC 931 ** connection. 932 ** In this case we don't actually fork. We must be 933 ** running SMTP for this to work. We will return a 934 ** zero pid to indicate that we are running IPC. 935 ** We also handle a debug version that just talks to stdin/out. 936 */ 937 938 curhost = NULL; 939 SmtpPhase = NULL; 940 mci = NULL; 941 942 #ifdef XDEBUG 943 { 944 char wbuf[MAXLINE]; 945 946 /* make absolutely certain 0, 1, and 2 are in use */ 947 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 948 checkfd012(wbuf); 949 } 950 #endif 951 952 /* check for Local Person Communication -- not for mortals!!! */ 953 if (strcmp(m->m_mailer, "[LPC]") == 0) 954 { 955 mci = (MCI *) xalloc(sizeof *mci); 956 bzero((char *) mci, sizeof *mci); 957 mci->mci_in = stdin; 958 mci->mci_out = stdout; 959 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 960 mci->mci_mailer = m; 961 } 962 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 963 strcmp(m->m_mailer, "[TCP]") == 0) 964 { 965 #ifdef DAEMON 966 register int i; 967 register u_short port; 968 969 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 970 { 971 syserr("null host name for %s mailer", m->m_mailer); 972 rcode = EX_CONFIG; 973 goto give_up; 974 } 975 976 CurHostName = pv[1]; 977 curhost = hostsignature(m, pv[1], e); 978 979 if (curhost == NULL || curhost[0] == '\0') 980 { 981 syserr("null host signature for %s", pv[1]); 982 rcode = EX_OSERR; 983 goto give_up; 984 } 985 986 if (!clever) 987 { 988 syserr("554 non-clever IPC"); 989 rcode = EX_CONFIG; 990 goto give_up; 991 } 992 if (pv[2] != NULL) 993 port = atoi(pv[2]); 994 else 995 port = 0; 996 tryhost: 997 while (*curhost != '\0') 998 { 999 register char *p; 1000 static char hostbuf[MAXNAME]; 1001 1002 /* pull the next host from the signature */ 1003 p = strchr(curhost, ':'); 1004 if (p == NULL) 1005 p = &curhost[strlen(curhost)]; 1006 if (p == curhost) 1007 { 1008 syserr("deliver: null host name in signature"); 1009 curhost++; 1010 continue; 1011 } 1012 strncpy(hostbuf, curhost, p - curhost); 1013 hostbuf[p - curhost] = '\0'; 1014 if (*p != '\0') 1015 p++; 1016 curhost = p; 1017 1018 /* see if we already know that this host is fried */ 1019 CurHostName = hostbuf; 1020 mci = mci_get(hostbuf, m); 1021 if (mci->mci_state != MCIS_CLOSED) 1022 { 1023 if (tTd(11, 1)) 1024 { 1025 printf("openmailer: "); 1026 mci_dump(mci, FALSE); 1027 } 1028 CurHostName = mci->mci_host; 1029 break; 1030 } 1031 mci->mci_mailer = m; 1032 if (mci->mci_exitstat != EX_OK) 1033 continue; 1034 1035 /* try the connection */ 1036 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1037 message("Connecting to %s (%s)...", 1038 hostbuf, m->m_name); 1039 i = makeconnection(hostbuf, port, mci, 1040 bitnset(M_SECURE_PORT, m->m_flags)); 1041 mci->mci_exitstat = i; 1042 mci->mci_errno = errno; 1043 #if NAMED_BIND 1044 mci->mci_herrno = h_errno; 1045 #endif 1046 if (i == EX_OK) 1047 { 1048 mci->mci_state = MCIS_OPENING; 1049 mci_cache(mci); 1050 if (TrafficLogFile != NULL) 1051 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1052 getpid(), hostbuf); 1053 break; 1054 } 1055 else if (tTd(11, 1)) 1056 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1057 i, errno); 1058 1059 /* enter status of this host */ 1060 setstat(i); 1061 1062 /* should print some message here for -v mode */ 1063 } 1064 if (mci == NULL) 1065 { 1066 syserr("deliver: no host name"); 1067 rcode = EX_OSERR; 1068 goto give_up; 1069 } 1070 mci->mci_pid = 0; 1071 #else /* no DAEMON */ 1072 syserr("554 openmailer: no IPC"); 1073 if (tTd(11, 1)) 1074 printf("openmailer: NULL\n"); 1075 rcode = EX_UNAVAILABLE; 1076 goto give_up; 1077 #endif /* DAEMON */ 1078 } 1079 else 1080 { 1081 if (TrafficLogFile != NULL) 1082 { 1083 char **av; 1084 1085 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1086 for (av = pv; *av != NULL; av++) 1087 fprintf(TrafficLogFile, " %s", *av); 1088 fprintf(TrafficLogFile, "\n"); 1089 } 1090 1091 /* create a pipe to shove the mail through */ 1092 if (pipe(mpvect) < 0) 1093 { 1094 syserr("%s... openmailer(%s): pipe (to mailer)", 1095 e->e_to, m->m_name); 1096 if (tTd(11, 1)) 1097 printf("openmailer: NULL\n"); 1098 rcode = EX_OSERR; 1099 goto give_up; 1100 } 1101 1102 /* if this mailer speaks smtp, create a return pipe */ 1103 if (clever && pipe(rpvect) < 0) 1104 { 1105 syserr("%s... openmailer(%s): pipe (from mailer)", 1106 e->e_to, m->m_name); 1107 (void) close(mpvect[0]); 1108 (void) close(mpvect[1]); 1109 if (tTd(11, 1)) 1110 printf("openmailer: NULL\n"); 1111 rcode = EX_OSERR; 1112 goto give_up; 1113 } 1114 1115 /* 1116 ** Actually fork the mailer process. 1117 ** DOFORK is clever about retrying. 1118 ** 1119 ** Dispose of SIGCHLD signal catchers that may be laying 1120 ** around so that endmail will get it. 1121 */ 1122 1123 if (e->e_xfp != NULL) 1124 (void) fflush(e->e_xfp); /* for debugging */ 1125 (void) fflush(stdout); 1126 # ifdef SIGCHLD 1127 (void) setsignal(SIGCHLD, SIG_DFL); 1128 # endif /* SIGCHLD */ 1129 DOFORK(FORK); 1130 /* pid is set by DOFORK */ 1131 if (pid < 0) 1132 { 1133 /* failure */ 1134 syserr("%s... openmailer(%s): cannot fork", 1135 e->e_to, m->m_name); 1136 (void) close(mpvect[0]); 1137 (void) close(mpvect[1]); 1138 if (clever) 1139 { 1140 (void) close(rpvect[0]); 1141 (void) close(rpvect[1]); 1142 } 1143 if (tTd(11, 1)) 1144 printf("openmailer: NULL\n"); 1145 rcode = EX_OSERR; 1146 goto give_up; 1147 } 1148 else if (pid == 0) 1149 { 1150 int i; 1151 int saveerrno; 1152 char **ep; 1153 char *env[MAXUSERENVIRON]; 1154 extern char **environ; 1155 extern int DtableSize; 1156 1157 /* child -- set up input & exec mailer */ 1158 (void) setsignal(SIGINT, SIG_IGN); 1159 (void) setsignal(SIGHUP, SIG_IGN); 1160 (void) setsignal(SIGTERM, SIG_DFL); 1161 1162 /* reset user and group */ 1163 if (!bitnset(M_RESTR, m->m_flags)) 1164 { 1165 if (ctladdr == NULL || ctladdr->q_uid == 0) 1166 { 1167 (void) initgroups(DefUser, DefGid); 1168 (void) setgid(DefGid); 1169 (void) setuid(DefUid); 1170 } 1171 else 1172 { 1173 (void) initgroups(ctladdr->q_ruser? 1174 ctladdr->q_ruser: ctladdr->q_user, 1175 ctladdr->q_gid); 1176 (void) setgid(ctladdr->q_gid); 1177 (void) setuid(ctladdr->q_uid); 1178 } 1179 } 1180 1181 if (tTd(11, 2)) 1182 printf("openmailer: running as r/euid=%d/%d\n", 1183 getuid(), geteuid()); 1184 1185 /* move into some "safe" directory */ 1186 if (m->m_execdir != NULL) 1187 { 1188 char *p, *q; 1189 char buf[MAXLINE]; 1190 1191 for (p = m->m_execdir; p != NULL; p = q) 1192 { 1193 q = strchr(p, ':'); 1194 if (q != NULL) 1195 *q = '\0'; 1196 expand(p, buf, &buf[sizeof buf] - 1, e); 1197 if (q != NULL) 1198 *q++ = ':'; 1199 if (tTd(11, 20)) 1200 printf("openmailer: trydir %s\n", 1201 buf); 1202 if (buf[0] != '\0' && chdir(buf) >= 0) 1203 break; 1204 } 1205 } 1206 1207 /* arrange to filter std & diag output of command */ 1208 if (clever) 1209 { 1210 (void) close(rpvect[0]); 1211 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1212 { 1213 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1214 e->e_to, m->m_name, rpvect[1]); 1215 _exit(EX_OSERR); 1216 } 1217 (void) close(rpvect[1]); 1218 } 1219 else if (OpMode == MD_SMTP || OpMode == MD_DAEMON || 1220 HoldErrs || DisConnected) 1221 { 1222 /* put mailer output in transcript */ 1223 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1224 { 1225 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1226 e->e_to, m->m_name, 1227 fileno(e->e_xfp)); 1228 _exit(EX_OSERR); 1229 } 1230 } 1231 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1232 { 1233 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1234 e->e_to, m->m_name); 1235 _exit(EX_OSERR); 1236 } 1237 1238 /* arrange to get standard input */ 1239 (void) close(mpvect[1]); 1240 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1241 { 1242 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1243 e->e_to, m->m_name, mpvect[0]); 1244 _exit(EX_OSERR); 1245 } 1246 (void) close(mpvect[0]); 1247 1248 /* arrange for all the files to be closed */ 1249 for (i = 3; i < DtableSize; i++) 1250 { 1251 register int j; 1252 1253 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1254 (void) fcntl(i, F_SETFD, j | 1); 1255 } 1256 1257 /* 1258 ** Set up the mailer environment 1259 ** TZ is timezone information. 1260 ** SYSTYPE is Apollo software sys type (required). 1261 ** ISP is Apollo hardware system type (required). 1262 */ 1263 1264 i = 0; 1265 env[i++] = "AGENT=sendmail"; 1266 for (ep = environ; *ep != NULL; ep++) 1267 { 1268 if (strncmp(*ep, "TZ=", 3) == 0 || 1269 strncmp(*ep, "ISP=", 4) == 0 || 1270 strncmp(*ep, "SYSTYPE=", 8) == 0) 1271 env[i++] = *ep; 1272 } 1273 env[i++] = NULL; 1274 1275 /* run disconnected from terminal */ 1276 (void) setsid(); 1277 1278 /* try to execute the mailer */ 1279 execve(m->m_mailer, pv, env); 1280 saveerrno = errno; 1281 syserr("Cannot exec %s", m->m_mailer); 1282 if (m == LocalMailer || transienterror(saveerrno)) 1283 _exit(EX_OSERR); 1284 _exit(EX_UNAVAILABLE); 1285 } 1286 1287 /* 1288 ** Set up return value. 1289 */ 1290 1291 mci = (MCI *) xalloc(sizeof *mci); 1292 bzero((char *) mci, sizeof *mci); 1293 mci->mci_mailer = m; 1294 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1295 mci->mci_pid = pid; 1296 (void) close(mpvect[0]); 1297 mci->mci_out = fdopen(mpvect[1], "w"); 1298 if (mci->mci_out == NULL) 1299 { 1300 syserr("deliver: cannot create mailer output channel, fd=%d", 1301 mpvect[1]); 1302 (void) close(mpvect[1]); 1303 if (clever) 1304 { 1305 (void) close(rpvect[0]); 1306 (void) close(rpvect[1]); 1307 } 1308 rcode = EX_OSERR; 1309 goto give_up; 1310 } 1311 if (clever) 1312 { 1313 (void) close(rpvect[1]); 1314 mci->mci_in = fdopen(rpvect[0], "r"); 1315 if (mci->mci_in == NULL) 1316 { 1317 syserr("deliver: cannot create mailer input channel, fd=%d", 1318 mpvect[1]); 1319 (void) close(rpvect[0]); 1320 fclose(mci->mci_out); 1321 mci->mci_out = NULL; 1322 rcode = EX_OSERR; 1323 goto give_up; 1324 } 1325 } 1326 else 1327 { 1328 mci->mci_flags |= MCIF_TEMP; 1329 mci->mci_in = NULL; 1330 } 1331 } 1332 1333 /* 1334 ** If we are in SMTP opening state, send initial protocol. 1335 */ 1336 1337 if (clever && mci->mci_state != MCIS_CLOSED) 1338 { 1339 smtpinit(m, mci, e); 1340 } 1341 if (tTd(11, 1)) 1342 { 1343 printf("openmailer: "); 1344 mci_dump(mci, FALSE); 1345 } 1346 1347 if (mci->mci_state != MCIS_OPEN) 1348 { 1349 /* couldn't open the mailer */ 1350 rcode = mci->mci_exitstat; 1351 errno = mci->mci_errno; 1352 #if NAMED_BIND 1353 h_errno = mci->mci_herrno; 1354 #endif 1355 if (rcode == EX_OK) 1356 { 1357 /* shouldn't happen */ 1358 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1359 rcode, mci->mci_state, firstsig); 1360 rcode = EX_SOFTWARE; 1361 } 1362 else if (rcode == EX_TEMPFAIL && curhost != NULL && *curhost != '\0') 1363 { 1364 /* try next MX site */ 1365 goto tryhost; 1366 } 1367 } 1368 else if (!clever) 1369 { 1370 /* 1371 ** Format and send message. 1372 */ 1373 1374 putfromline(mci, e); 1375 (*e->e_puthdr)(mci, e); 1376 putline("\n", mci); 1377 (*e->e_putbody)(mci, e, NULL); 1378 1379 /* get the exit status */ 1380 rcode = endmailer(mci, e, pv); 1381 } 1382 else 1383 #ifdef SMTP 1384 { 1385 /* 1386 ** Send the MAIL FROM: protocol 1387 */ 1388 1389 rcode = smtpmailfrom(m, mci, e); 1390 if (rcode == EX_OK) 1391 { 1392 register char *t = tobuf; 1393 register int i; 1394 1395 /* send the recipient list */ 1396 tobuf[0] = '\0'; 1397 for (to = tochain; to != NULL; to = to->q_tchain) 1398 { 1399 e->e_to = to->q_paddr; 1400 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1401 { 1402 markfailure(e, to, i); 1403 giveresponse(i, m, mci, ctladdr, e); 1404 } 1405 else 1406 { 1407 *t++ = ','; 1408 for (p = to->q_paddr; *p; *t++ = *p++) 1409 continue; 1410 *t = '\0'; 1411 } 1412 } 1413 1414 /* now send the data */ 1415 if (tobuf[0] == '\0') 1416 { 1417 rcode = EX_OK; 1418 e->e_to = NULL; 1419 if (bitset(MCIF_CACHED, mci->mci_flags)) 1420 smtprset(m, mci, e); 1421 } 1422 else 1423 { 1424 e->e_to = tobuf + 1; 1425 rcode = smtpdata(m, mci, e); 1426 } 1427 1428 /* now close the connection */ 1429 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1430 smtpquit(m, mci, e); 1431 } 1432 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1433 { 1434 /* try next MX site */ 1435 goto tryhost; 1436 } 1437 } 1438 #else /* not SMTP */ 1439 { 1440 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1441 rcode = EX_CONFIG; 1442 goto give_up; 1443 } 1444 #endif /* SMTP */ 1445 #if NAMED_BIND 1446 if (ConfigLevel < 2) 1447 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1448 #endif 1449 1450 /* arrange a return receipt if requested */ 1451 if (rcode == EX_OK && e->e_receiptto != NULL && 1452 bitnset(M_LOCALMAILER, m->m_flags)) 1453 { 1454 e->e_flags |= EF_SENDRECEIPT; 1455 /* do we want to send back more info? */ 1456 } 1457 1458 /* 1459 ** Do final status disposal. 1460 ** We check for something in tobuf for the SMTP case. 1461 ** If we got a temporary failure, arrange to queue the 1462 ** addressees. 1463 */ 1464 1465 give_up: 1466 if (tobuf[0] != '\0') 1467 giveresponse(rcode, m, mci, ctladdr, e); 1468 for (to = tochain; to != NULL; to = to->q_tchain) 1469 { 1470 if (rcode != EX_OK) 1471 markfailure(e, to, rcode); 1472 else 1473 { 1474 to->q_flags |= QSENT; 1475 e->e_nsent++; 1476 if (e->e_receiptto != NULL && 1477 bitnset(M_LOCALMAILER, m->m_flags)) 1478 { 1479 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1480 to->q_paddr); 1481 } 1482 } 1483 } 1484 1485 /* 1486 ** Restore state and return. 1487 */ 1488 1489 #ifdef XDEBUG 1490 { 1491 char wbuf[MAXLINE]; 1492 1493 /* make absolutely certain 0, 1, and 2 are in use */ 1494 sprintf(wbuf, "%s... end of deliver(%s)", 1495 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1496 m->m_name); 1497 checkfd012(wbuf); 1498 } 1499 #endif 1500 1501 errno = 0; 1502 define('g', (char *) NULL, e); 1503 return (rcode); 1504 } 1505 /* 1506 ** MARKFAILURE -- mark a failure on a specific address. 1507 ** 1508 ** Parameters: 1509 ** e -- the envelope we are sending. 1510 ** q -- the address to mark. 1511 ** rcode -- the code signifying the particular failure. 1512 ** 1513 ** Returns: 1514 ** none. 1515 ** 1516 ** Side Effects: 1517 ** marks the address (and possibly the envelope) with the 1518 ** failure so that an error will be returned or 1519 ** the message will be queued, as appropriate. 1520 */ 1521 1522 markfailure(e, q, rcode) 1523 register ENVELOPE *e; 1524 register ADDRESS *q; 1525 int rcode; 1526 { 1527 char buf[MAXLINE]; 1528 1529 switch (rcode) 1530 { 1531 case EX_OK: 1532 break; 1533 1534 case EX_TEMPFAIL: 1535 case EX_IOERR: 1536 case EX_OSERR: 1537 q->q_flags |= QQUEUEUP; 1538 break; 1539 1540 default: 1541 q->q_flags |= QBADADDR; 1542 break; 1543 } 1544 } 1545 /* 1546 ** ENDMAILER -- Wait for mailer to terminate. 1547 ** 1548 ** We should never get fatal errors (e.g., segmentation 1549 ** violation), so we report those specially. For other 1550 ** errors, we choose a status message (into statmsg), 1551 ** and if it represents an error, we print it. 1552 ** 1553 ** Parameters: 1554 ** pid -- pid of mailer. 1555 ** e -- the current envelope. 1556 ** pv -- the parameter vector that invoked the mailer 1557 ** (for error messages). 1558 ** 1559 ** Returns: 1560 ** exit code of mailer. 1561 ** 1562 ** Side Effects: 1563 ** none. 1564 */ 1565 1566 endmailer(mci, e, pv) 1567 register MCI *mci; 1568 register ENVELOPE *e; 1569 char **pv; 1570 { 1571 int st; 1572 1573 /* close any connections */ 1574 if (mci->mci_in != NULL) 1575 (void) xfclose(mci->mci_in, mci->mci_mailer->m_name, "mci_in"); 1576 if (mci->mci_out != NULL) 1577 (void) xfclose(mci->mci_out, mci->mci_mailer->m_name, "mci_out"); 1578 mci->mci_in = mci->mci_out = NULL; 1579 mci->mci_state = MCIS_CLOSED; 1580 1581 /* in the IPC case there is nothing to wait for */ 1582 if (mci->mci_pid == 0) 1583 return (EX_OK); 1584 1585 /* wait for the mailer process to die and collect status */ 1586 st = waitfor(mci->mci_pid); 1587 if (st == -1) 1588 { 1589 syserr("endmailer %s: wait", pv[0]); 1590 return (EX_SOFTWARE); 1591 } 1592 1593 if (WIFEXITED(st)) 1594 { 1595 /* normal death -- return status */ 1596 return (WEXITSTATUS(st)); 1597 } 1598 1599 /* it died a horrid death */ 1600 syserr("451 mailer %s died with signal %o", 1601 mci->mci_mailer->m_name, st); 1602 1603 /* log the arguments */ 1604 if (pv != NULL && e->e_xfp != NULL) 1605 { 1606 register char **av; 1607 1608 fprintf(e->e_xfp, "Arguments:"); 1609 for (av = pv; *av != NULL; av++) 1610 fprintf(e->e_xfp, " %s", *av); 1611 fprintf(e->e_xfp, "\n"); 1612 } 1613 1614 ExitStat = EX_TEMPFAIL; 1615 return (EX_TEMPFAIL); 1616 } 1617 /* 1618 ** GIVERESPONSE -- Interpret an error response from a mailer 1619 ** 1620 ** Parameters: 1621 ** stat -- the status code from the mailer (high byte 1622 ** only; core dumps must have been taken care of 1623 ** already). 1624 ** m -- the mailer info for this mailer. 1625 ** mci -- the mailer connection info -- can be NULL if the 1626 ** response is given before the connection is made. 1627 ** ctladdr -- the controlling address for the recipient 1628 ** address(es). 1629 ** e -- the current envelope. 1630 ** 1631 ** Returns: 1632 ** none. 1633 ** 1634 ** Side Effects: 1635 ** Errors may be incremented. 1636 ** ExitStat may be set. 1637 */ 1638 1639 giveresponse(stat, m, mci, ctladdr, e) 1640 int stat; 1641 register MAILER *m; 1642 register MCI *mci; 1643 ADDRESS *ctladdr; 1644 ENVELOPE *e; 1645 { 1646 register const char *statmsg; 1647 extern char *SysExMsg[]; 1648 register int i; 1649 extern int N_SysEx; 1650 char buf[MAXLINE]; 1651 1652 /* 1653 ** Compute status message from code. 1654 */ 1655 1656 i = stat - EX__BASE; 1657 if (stat == 0) 1658 { 1659 statmsg = "250 Sent"; 1660 if (e->e_statmsg != NULL) 1661 { 1662 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1663 statmsg = buf; 1664 } 1665 } 1666 else if (i < 0 || i > N_SysEx) 1667 { 1668 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1669 stat = EX_UNAVAILABLE; 1670 statmsg = buf; 1671 } 1672 else if (stat == EX_TEMPFAIL) 1673 { 1674 (void) strcpy(buf, SysExMsg[i] + 1); 1675 #if NAMED_BIND 1676 if (h_errno == TRY_AGAIN) 1677 statmsg = errstring(h_errno+E_DNSBASE); 1678 else 1679 #endif 1680 { 1681 if (errno != 0) 1682 statmsg = errstring(errno); 1683 else 1684 { 1685 #ifdef SMTP 1686 statmsg = SmtpError; 1687 #else /* SMTP */ 1688 statmsg = NULL; 1689 #endif /* SMTP */ 1690 } 1691 } 1692 if (statmsg != NULL && statmsg[0] != '\0') 1693 { 1694 (void) strcat(buf, ": "); 1695 (void) strcat(buf, statmsg); 1696 } 1697 statmsg = buf; 1698 } 1699 #if NAMED_BIND 1700 else if (stat == EX_NOHOST && h_errno != 0) 1701 { 1702 statmsg = errstring(h_errno + E_DNSBASE); 1703 (void) sprintf(buf, "%s (%s)", SysExMsg[i] + 1, statmsg); 1704 statmsg = buf; 1705 } 1706 #endif 1707 else 1708 { 1709 statmsg = SysExMsg[i]; 1710 if (*statmsg++ == ':') 1711 { 1712 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1713 statmsg = buf; 1714 } 1715 } 1716 1717 /* 1718 ** Print the message as appropriate 1719 */ 1720 1721 if (stat == EX_OK || stat == EX_TEMPFAIL) 1722 { 1723 extern char MsgBuf[]; 1724 1725 message("%s", &statmsg[4]); 1726 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1727 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1728 } 1729 else 1730 { 1731 char mbuf[8]; 1732 1733 Errors++; 1734 sprintf(mbuf, "%.3s %%s", statmsg); 1735 usrerr(mbuf, &statmsg[4]); 1736 } 1737 1738 /* 1739 ** Final cleanup. 1740 ** Log a record of the transaction. Compute the new 1741 ** ExitStat -- if we already had an error, stick with 1742 ** that. 1743 */ 1744 1745 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1746 logdelivery(m, mci, &statmsg[4], ctladdr, e); 1747 1748 if (tTd(11, 2)) 1749 printf("giveresponse: stat=%d, e->e_message=%s\n", 1750 stat, e->e_message); 1751 1752 if (stat != EX_TEMPFAIL) 1753 setstat(stat); 1754 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1755 { 1756 if (e->e_message != NULL) 1757 free(e->e_message); 1758 e->e_message = newstr(&statmsg[4]); 1759 } 1760 errno = 0; 1761 #if NAMED_BIND 1762 h_errno = 0; 1763 #endif 1764 } 1765 /* 1766 ** LOGDELIVERY -- log the delivery in the system log 1767 ** 1768 ** Care is taken to avoid logging lines that are too long, because 1769 ** some versions of syslog have an unfortunate proclivity for core 1770 ** dumping. This is a hack, to be sure, that is at best empirical. 1771 ** 1772 ** Parameters: 1773 ** m -- the mailer info. Can be NULL for initial queue. 1774 ** mci -- the mailer connection info -- can be NULL if the 1775 ** log is occuring when no connection is active. 1776 ** stat -- the message to print for the status. 1777 ** ctladdr -- the controlling address for the to list. 1778 ** e -- the current envelope. 1779 ** 1780 ** Returns: 1781 ** none 1782 ** 1783 ** Side Effects: 1784 ** none 1785 */ 1786 1787 logdelivery(m, mci, stat, ctladdr, e) 1788 MAILER *m; 1789 register MCI *mci; 1790 char *stat; 1791 ADDRESS *ctladdr; 1792 register ENVELOPE *e; 1793 { 1794 # ifdef LOG 1795 register char *bp; 1796 register char *p; 1797 int l; 1798 char buf[512]; 1799 1800 # if (SYSLOG_BUFSIZE) >= 256 1801 bp = buf; 1802 if (ctladdr != NULL) 1803 { 1804 strcpy(bp, ", ctladdr="); 1805 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 1806 bp += strlen(bp); 1807 if (bitset(QGOODUID, ctladdr->q_flags)) 1808 { 1809 (void) sprintf(bp, " (%d/%d)", 1810 ctladdr->q_uid, ctladdr->q_gid); 1811 bp += strlen(bp); 1812 } 1813 } 1814 1815 (void) sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1816 bp += strlen(bp); 1817 1818 if (m != NULL) 1819 { 1820 (void) strcpy(bp, ", mailer="); 1821 (void) strcat(bp, m->m_name); 1822 bp += strlen(bp); 1823 } 1824 1825 if (mci != NULL && mci->mci_host != NULL) 1826 { 1827 # ifdef DAEMON 1828 extern SOCKADDR CurHostAddr; 1829 # endif 1830 1831 (void) strcpy(bp, ", relay="); 1832 (void) strcat(bp, mci->mci_host); 1833 1834 # ifdef DAEMON 1835 (void) strcat(bp, " ["); 1836 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 1837 (void) strcat(bp, "]"); 1838 # endif 1839 } 1840 else if (strcmp(stat, "queued") != 0) 1841 { 1842 char *p = macvalue('h', e); 1843 1844 if (p != NULL && p[0] != '\0') 1845 { 1846 (void) strcpy(bp, ", relay="); 1847 (void) strcat(bp, p); 1848 } 1849 } 1850 bp += strlen(bp); 1851 1852 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 1853 #if (STATLEN) < 63 1854 # undef STATLEN 1855 # define STATLEN 63 1856 #endif 1857 #if (STATLEN) > 203 1858 # undef STATLEN 1859 # define STATLEN 203 1860 #endif 1861 1862 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 1863 { 1864 /* desperation move -- truncate data */ 1865 bp = buf + sizeof buf - ((STATLEN) + 17); 1866 strcpy(bp, "..."); 1867 bp += 3; 1868 } 1869 1870 (void) strcpy(bp, ", stat="); 1871 bp += strlen(bp); 1872 1873 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 1874 1875 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 1876 p = e->e_to; 1877 while (strlen(p) >= l) 1878 { 1879 register char *q = strchr(p + l, ','); 1880 1881 if (q == NULL) 1882 break; 1883 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 1884 e->e_id, ++q - p, p, buf); 1885 p = q; 1886 } 1887 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 1888 1889 # else /* we have a very short log buffer size */ 1890 1891 l = SYSLOG_BUFSIZE - 85; 1892 p = e->e_to; 1893 while (strlen(p) >= l) 1894 { 1895 register char *q = strchr(p + l, ','); 1896 1897 if (q == NULL) 1898 break; 1899 syslog(LOG_INFO, "%s: to=%.*s [more]", 1900 e->e_id, ++q - p, p); 1901 p = q; 1902 } 1903 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 1904 1905 if (ctladdr != NULL) 1906 { 1907 bp = buf; 1908 strcpy(buf, "ctladdr="); 1909 bp += strlen(buf); 1910 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 1911 bp += strlen(buf); 1912 if (bitset(QGOODUID, ctladdr->q_flags)) 1913 { 1914 (void) sprintf(bp, " (%d/%d)", 1915 ctladdr->q_uid, ctladdr->q_gid); 1916 bp += strlen(bp); 1917 } 1918 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1919 } 1920 bp = buf; 1921 sprintf(bp, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1922 bp += strlen(bp); 1923 1924 if (m != NULL) 1925 { 1926 sprintf(bp, ", mailer=%s", m->m_name); 1927 bp += strlen(bp); 1928 } 1929 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1930 1931 buf[0] = '\0'; 1932 if (mci != NULL && mci->mci_host != NULL) 1933 { 1934 # ifdef DAEMON 1935 extern SOCKADDR CurHostAddr; 1936 # endif 1937 1938 sprintf(buf, "relay=%s", mci->mci_host); 1939 1940 # ifdef DAEMON 1941 (void) strcat(buf, " ["); 1942 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 1943 (void) strcat(buf, "]"); 1944 # endif 1945 } 1946 else if (strcmp(stat, "queued") != 0) 1947 { 1948 char *p = macvalue('h', e); 1949 1950 if (p != NULL && p[0] != '\0') 1951 sprintf(buf, "relay=%s", p); 1952 } 1953 if (buf[0] != '\0') 1954 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1955 1956 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 1957 # endif /* short log buffer */ 1958 # endif /* LOG */ 1959 } 1960 /* 1961 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1962 ** 1963 ** This can be made an arbitrary message separator by changing $l 1964 ** 1965 ** One of the ugliest hacks seen by human eyes is contained herein: 1966 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1967 ** does a well-meaning programmer such as myself have to deal with 1968 ** this kind of antique garbage???? 1969 ** 1970 ** Parameters: 1971 ** mci -- the connection information. 1972 ** e -- the envelope. 1973 ** 1974 ** Returns: 1975 ** none 1976 ** 1977 ** Side Effects: 1978 ** outputs some text to fp. 1979 */ 1980 1981 putfromline(mci, e) 1982 register MCI *mci; 1983 ENVELOPE *e; 1984 { 1985 char *template = "\201l\n"; 1986 char buf[MAXLINE]; 1987 1988 if (bitnset(M_NHDR, mci->mci_mailer->m_flags)) 1989 return; 1990 1991 # ifdef UGLYUUCP 1992 if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags)) 1993 { 1994 char *bang; 1995 char xbuf[MAXLINE]; 1996 1997 expand("\201g", buf, &buf[sizeof buf - 1], e); 1998 bang = strchr(buf, '!'); 1999 if (bang == NULL) 2000 { 2001 errno = 0; 2002 syserr("554 No ! in UUCP From address! (%s given)", buf); 2003 } 2004 else 2005 { 2006 *bang++ = '\0'; 2007 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 2008 template = xbuf; 2009 } 2010 } 2011 # endif /* UGLYUUCP */ 2012 expand(template, buf, &buf[sizeof buf - 1], e); 2013 putline(buf, mci); 2014 } 2015 /* 2016 ** PUTBODY -- put the body of a message. 2017 ** 2018 ** Parameters: 2019 ** mci -- the connection information. 2020 ** e -- the envelope to put out. 2021 ** separator -- if non-NULL, a message separator that must 2022 ** not be permitted in the resulting message. 2023 ** 2024 ** Returns: 2025 ** none. 2026 ** 2027 ** Side Effects: 2028 ** The message is written onto fp. 2029 */ 2030 2031 putbody(mci, e, separator) 2032 register MCI *mci; 2033 register ENVELOPE *e; 2034 char *separator; 2035 { 2036 char buf[MAXLINE]; 2037 2038 /* 2039 ** Output the body of the message 2040 */ 2041 2042 if (e->e_dfp == NULL) 2043 { 2044 if (e->e_df != NULL) 2045 { 2046 e->e_dfp = fopen(e->e_df, "r"); 2047 if (e->e_dfp == NULL) 2048 syserr("putbody: Cannot open %s for %s from %s", 2049 e->e_df, e->e_to, e->e_from.q_paddr); 2050 } 2051 else 2052 putline("<<< No Message Collected >>>", mci); 2053 } 2054 if (e->e_dfp != NULL) 2055 { 2056 rewind(e->e_dfp); 2057 while (!ferror(mci->mci_out) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 2058 { 2059 if (buf[0] == 'F' && 2060 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) && 2061 strncmp(buf, "From ", 5) == 0) 2062 (void) putc('>', mci->mci_out); 2063 if (buf[0] == '-' && buf[1] == '-' && separator != NULL) 2064 { 2065 /* possible separator */ 2066 int sl = strlen(separator); 2067 2068 if (strncmp(&buf[2], separator, sl) == 0) 2069 (void) putc(' ', mci->mci_out); 2070 } 2071 putline(buf, mci); 2072 } 2073 2074 if (ferror(e->e_dfp)) 2075 { 2076 syserr("putbody: %s: read error", e->e_df); 2077 ExitStat = EX_IOERR; 2078 } 2079 } 2080 2081 /* some mailers want extra blank line at end of message */ 2082 if (bitnset(M_BLANKEND, mci->mci_mailer->m_flags) && 2083 buf[0] != '\0' && buf[0] != '\n') 2084 putline("", mci); 2085 2086 (void) fflush(mci->mci_out); 2087 if (ferror(mci->mci_out) && errno != EPIPE) 2088 { 2089 syserr("putbody: write error"); 2090 ExitStat = EX_IOERR; 2091 } 2092 errno = 0; 2093 } 2094 /* 2095 ** MAILFILE -- Send a message to a file. 2096 ** 2097 ** If the file has the setuid/setgid bits set, but NO execute 2098 ** bits, sendmail will try to become the owner of that file 2099 ** rather than the real user. Obviously, this only works if 2100 ** sendmail runs as root. 2101 ** 2102 ** This could be done as a subordinate mailer, except that it 2103 ** is used implicitly to save messages in ~/dead.letter. We 2104 ** view this as being sufficiently important as to include it 2105 ** here. For example, if the system is dying, we shouldn't have 2106 ** to create another process plus some pipes to save the message. 2107 ** 2108 ** Parameters: 2109 ** filename -- the name of the file to send to. 2110 ** ctladdr -- the controlling address header -- includes 2111 ** the userid/groupid to be when sending. 2112 ** 2113 ** Returns: 2114 ** The exit code associated with the operation. 2115 ** 2116 ** Side Effects: 2117 ** none. 2118 */ 2119 2120 mailfile(filename, ctladdr, e) 2121 char *filename; 2122 ADDRESS *ctladdr; 2123 register ENVELOPE *e; 2124 { 2125 register FILE *f; 2126 register int pid; 2127 int mode; 2128 2129 if (tTd(11, 1)) 2130 { 2131 printf("mailfile %s\n ctladdr=", filename); 2132 printaddr(ctladdr, FALSE); 2133 } 2134 2135 if (e->e_xfp != NULL) 2136 fflush(e->e_xfp); 2137 2138 /* 2139 ** Fork so we can change permissions here. 2140 ** Note that we MUST use fork, not vfork, because of 2141 ** the complications of calling subroutines, etc. 2142 */ 2143 2144 DOFORK(fork); 2145 2146 if (pid < 0) 2147 return (EX_OSERR); 2148 else if (pid == 0) 2149 { 2150 /* child -- actually write to file */ 2151 struct stat stb; 2152 MCI mcibuf; 2153 2154 (void) setsignal(SIGINT, SIG_DFL); 2155 (void) setsignal(SIGHUP, SIG_DFL); 2156 (void) setsignal(SIGTERM, SIG_DFL); 2157 (void) umask(OldUmask); 2158 2159 if (stat(filename, &stb) < 0) 2160 stb.st_mode = FileMode; 2161 mode = stb.st_mode; 2162 2163 /* limit the errors to those actually caused in the child */ 2164 errno = 0; 2165 ExitStat = EX_OK; 2166 2167 if (bitset(0111, stb.st_mode)) 2168 exit(EX_CANTCREAT); 2169 if (ctladdr != NULL) 2170 { 2171 /* ignore setuid and setgid bits */ 2172 mode &= ~(S_ISGID|S_ISUID); 2173 } 2174 2175 /* we have to open the dfile BEFORE setuid */ 2176 if (e->e_dfp == NULL && e->e_df != NULL) 2177 { 2178 e->e_dfp = fopen(e->e_df, "r"); 2179 if (e->e_dfp == NULL) 2180 { 2181 syserr("mailfile: Cannot open %s for %s from %s", 2182 e->e_df, e->e_to, e->e_from.q_paddr); 2183 } 2184 } 2185 2186 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 2187 { 2188 if (ctladdr == NULL || ctladdr->q_uid == 0) 2189 { 2190 (void) initgroups(DefUser, DefGid); 2191 } 2192 else 2193 { 2194 (void) initgroups(ctladdr->q_ruser ? 2195 ctladdr->q_ruser : ctladdr->q_user, 2196 ctladdr->q_gid); 2197 } 2198 } 2199 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 2200 { 2201 if (ctladdr == NULL || ctladdr->q_uid == 0) 2202 (void) setuid(DefUid); 2203 else 2204 (void) setuid(ctladdr->q_uid); 2205 } 2206 FileName = filename; 2207 LineNumber = 0; 2208 f = dfopen(filename, O_WRONLY|O_CREAT|O_APPEND, FileMode); 2209 if (f == NULL) 2210 { 2211 message("554 cannot open: %s", errstring(errno)); 2212 exit(EX_CANTCREAT); 2213 } 2214 2215 bzero(&mcibuf, sizeof mcibuf); 2216 mcibuf.mci_mailer = FileMailer; 2217 mcibuf.mci_out = f; 2218 if (bitnset(M_7BITS, FileMailer->m_flags)) 2219 mcibuf.mci_flags |= MCIF_7BIT; 2220 2221 putfromline(&mcibuf, e); 2222 (*e->e_puthdr)(&mcibuf, e); 2223 putline("\n", &mcibuf); 2224 (*e->e_putbody)(&mcibuf, e, NULL); 2225 putline("\n", &mcibuf); 2226 if (ferror(f)) 2227 { 2228 message("451 I/O error: %s", errstring(errno)); 2229 setstat(EX_IOERR); 2230 } 2231 (void) xfclose(f, "mailfile", filename); 2232 (void) fflush(stdout); 2233 2234 /* reset ISUID & ISGID bits for paranoid systems */ 2235 (void) chmod(filename, (int) stb.st_mode); 2236 exit(ExitStat); 2237 /*NOTREACHED*/ 2238 } 2239 else 2240 { 2241 /* parent -- wait for exit status */ 2242 int st; 2243 2244 st = waitfor(pid); 2245 if (WIFEXITED(st)) 2246 return (WEXITSTATUS(st)); 2247 else 2248 { 2249 syserr("child died on signal %d", st); 2250 return (EX_UNAVAILABLE); 2251 } 2252 /*NOTREACHED*/ 2253 } 2254 } 2255 /* 2256 ** HOSTSIGNATURE -- return the "signature" for a host. 2257 ** 2258 ** The signature describes how we are going to send this -- it 2259 ** can be just the hostname (for non-Internet hosts) or can be 2260 ** an ordered list of MX hosts. 2261 ** 2262 ** Parameters: 2263 ** m -- the mailer describing this host. 2264 ** host -- the host name. 2265 ** e -- the current envelope. 2266 ** 2267 ** Returns: 2268 ** The signature for this host. 2269 ** 2270 ** Side Effects: 2271 ** Can tweak the symbol table. 2272 */ 2273 2274 char * 2275 hostsignature(m, host, e) 2276 register MAILER *m; 2277 char *host; 2278 ENVELOPE *e; 2279 { 2280 register char *p; 2281 register STAB *s; 2282 int i; 2283 int len; 2284 #if NAMED_BIND 2285 int nmx; 2286 auto int rcode; 2287 char *hp; 2288 char *endp; 2289 int oldoptions; 2290 char *mxhosts[MAXMXHOSTS + 1]; 2291 #endif 2292 2293 /* 2294 ** Check to see if this uses IPC -- if not, it can't have MX records. 2295 */ 2296 2297 p = m->m_mailer; 2298 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2299 { 2300 /* just an ordinary mailer */ 2301 return host; 2302 } 2303 2304 /* 2305 ** Look it up in the symbol table. 2306 */ 2307 2308 s = stab(host, ST_HOSTSIG, ST_ENTER); 2309 if (s->s_hostsig != NULL) 2310 return s->s_hostsig; 2311 2312 /* 2313 ** Not already there -- create a signature. 2314 */ 2315 2316 #if NAMED_BIND 2317 if (ConfigLevel < 2) 2318 { 2319 oldoptions = _res.options; 2320 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2321 } 2322 2323 for (hp = host; hp != NULL; hp = endp) 2324 { 2325 endp = strchr(hp, ':'); 2326 if (endp != NULL) 2327 *endp = '\0'; 2328 2329 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2330 2331 if (nmx <= 0) 2332 { 2333 register MCI *mci; 2334 2335 /* update the connection info for this host */ 2336 mci = mci_get(hp, m); 2337 mci->mci_exitstat = rcode; 2338 mci->mci_errno = errno; 2339 #if NAMED_BIND 2340 mci->mci_herrno = h_errno; 2341 #endif 2342 2343 /* and return the original host name as the signature */ 2344 nmx = 1; 2345 mxhosts[0] = hp; 2346 } 2347 2348 len = 0; 2349 for (i = 0; i < nmx; i++) 2350 { 2351 len += strlen(mxhosts[i]) + 1; 2352 } 2353 if (s->s_hostsig != NULL) 2354 len += strlen(s->s_hostsig) + 1; 2355 p = xalloc(len); 2356 if (s->s_hostsig != NULL) 2357 { 2358 (void) strcpy(p, s->s_hostsig); 2359 free(s->s_hostsig); 2360 s->s_hostsig = p; 2361 p += strlen(p); 2362 *p++ = ':'; 2363 } 2364 else 2365 s->s_hostsig = p; 2366 for (i = 0; i < nmx; i++) 2367 { 2368 if (i != 0) 2369 *p++ = ':'; 2370 strcpy(p, mxhosts[i]); 2371 p += strlen(p); 2372 } 2373 if (endp != NULL) 2374 *endp++ = ':'; 2375 } 2376 makelower(s->s_hostsig); 2377 if (ConfigLevel < 2) 2378 _res.options = oldoptions; 2379 #else 2380 /* not using BIND -- the signature is just the host name */ 2381 s->s_hostsig = host; 2382 #endif 2383 if (tTd(17, 1)) 2384 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2385 return s->s_hostsig; 2386 } 2387