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 8.30 (Berkeley) 10/08/93"; 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 /* 24 ** SENDALL -- actually send all the messages. 25 ** 26 ** Parameters: 27 ** e -- the envelope to send. 28 ** mode -- the delivery mode to use. If SM_DEFAULT, use 29 ** the current e->e_sendmode. 30 ** 31 ** Returns: 32 ** none. 33 ** 34 ** Side Effects: 35 ** Scans the send lists and sends everything it finds. 36 ** Delivers any appropriate error messages. 37 ** If we are running in a non-interactive mode, takes the 38 ** appropriate action. 39 */ 40 41 sendall(e, mode) 42 ENVELOPE *e; 43 char mode; 44 { 45 register ADDRESS *q; 46 char *owner; 47 int otherowners; 48 register ENVELOPE *ee; 49 ENVELOPE *splitenv = NULL; 50 bool announcequeueup; 51 52 /* 53 ** If we have had global, fatal errors, don't bother sending 54 ** the message at all if we are in SMTP mode. Local errors 55 ** (e.g., a single address failing) will still cause the other 56 ** addresses to be sent. 57 */ 58 59 if (bitset(EF_FATALERRS, e->e_flags) && OpMode == MD_SMTP) 60 { 61 e->e_flags |= EF_CLRQUEUE; 62 return; 63 } 64 65 /* determine actual delivery mode */ 66 if (mode == SM_DEFAULT) 67 { 68 mode = e->e_sendmode; 69 if (mode != SM_VERIFY && 70 shouldqueue(e->e_msgpriority, e->e_ctime)) 71 mode = SM_QUEUE; 72 announcequeueup = mode == SM_QUEUE; 73 } 74 else 75 announcequeueup = FALSE; 76 77 if (tTd(13, 1)) 78 { 79 printf("\n===== SENDALL: mode %c, id %s, e_from ", 80 mode, e->e_id); 81 printaddr(&e->e_from, FALSE); 82 printf("sendqueue:\n"); 83 printaddr(e->e_sendqueue, TRUE); 84 } 85 86 /* 87 ** Do any preprocessing necessary for the mode we are running. 88 ** Check to make sure the hop count is reasonable. 89 ** Delete sends to the sender in mailing lists. 90 */ 91 92 CurEnv = e; 93 94 if (e->e_hopcount > MaxHopCount) 95 { 96 errno = 0; 97 syserr("554 too many hops %d (%d max): from %s via %s, to %s", 98 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 99 RealHostName, e->e_sendqueue->q_paddr); 100 return; 101 } 102 103 /* 104 ** Do sender deletion. 105 ** 106 ** If the sender has the QQUEUEUP flag set, skip this. 107 ** This can happen if the name server is hosed when you 108 ** are trying to send mail. The result is that the sender 109 ** is instantiated in the queue as a recipient. 110 */ 111 112 if (!bitset(EF_METOO, e->e_flags) && 113 !bitset(QQUEUEUP, e->e_from.q_flags)) 114 { 115 if (tTd(13, 5)) 116 { 117 printf("sendall: QDONTSEND "); 118 printaddr(&e->e_from, FALSE); 119 } 120 e->e_from.q_flags |= QDONTSEND; 121 (void) recipient(&e->e_from, &e->e_sendqueue, e); 122 } 123 124 /* 125 ** Handle alias owners. 126 ** 127 ** We scan up the q_alias chain looking for owners. 128 ** We discard owners that are the same as the return path. 129 */ 130 131 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 132 { 133 register struct address *a; 134 135 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 136 continue; 137 if (a != NULL) 138 q->q_owner = a->q_owner; 139 140 if (q->q_owner != NULL && 141 !bitset(QDONTSEND, q->q_flags) && 142 strcmp(q->q_owner, e->e_from.q_paddr) == 0) 143 q->q_owner = NULL; 144 } 145 146 owner = ""; 147 otherowners = 1; 148 while (owner != NULL && otherowners > 0) 149 { 150 owner = NULL; 151 otherowners = 0; 152 153 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 154 { 155 if (bitset(QDONTSEND, q->q_flags)) 156 continue; 157 158 if (q->q_owner != NULL) 159 { 160 if (owner == NULL) 161 owner = q->q_owner; 162 else if (owner != q->q_owner) 163 { 164 if (strcmp(owner, q->q_owner) == 0) 165 { 166 /* make future comparisons cheap */ 167 q->q_owner = owner; 168 } 169 else 170 { 171 otherowners++; 172 } 173 owner = q->q_owner; 174 } 175 } 176 else 177 { 178 otherowners++; 179 } 180 } 181 182 if (owner != NULL && otherowners > 0) 183 { 184 extern HDR *copyheader(); 185 extern ADDRESS *copyqueue(); 186 187 /* 188 ** Split this envelope into two. 189 */ 190 191 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 192 *ee = *e; 193 ee->e_id = NULL; 194 (void) queuename(ee, '\0'); 195 196 if (tTd(13, 1)) 197 printf("sendall: split %s into %s\n", 198 e->e_id, ee->e_id); 199 200 ee->e_header = copyheader(e->e_header); 201 ee->e_sendqueue = copyqueue(e->e_sendqueue); 202 ee->e_errorqueue = copyqueue(e->e_errorqueue); 203 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS); 204 setsender(owner, ee, NULL, TRUE); 205 if (tTd(13, 5)) 206 { 207 printf("sendall(split): QDONTSEND "); 208 printaddr(&ee->e_from, FALSE); 209 } 210 ee->e_from.q_flags |= QDONTSEND; 211 ee->e_dfp = NULL; 212 ee->e_xfp = NULL; 213 ee->e_lockfp = NULL; 214 ee->e_df = NULL; 215 ee->e_errormode = EM_MAIL; 216 ee->e_sibling = splitenv; 217 splitenv = ee; 218 219 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 220 if (q->q_owner == owner) 221 q->q_flags |= QDONTSEND; 222 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 223 if (q->q_owner != owner) 224 q->q_flags |= QDONTSEND; 225 226 if (e->e_df != NULL && mode != SM_VERIFY) 227 { 228 ee->e_dfp = NULL; 229 ee->e_df = queuename(ee, 'd'); 230 ee->e_df = newstr(ee->e_df); 231 if (link(e->e_df, ee->e_df) < 0) 232 { 233 syserr("sendall: link(%s, %s)", 234 e->e_df, ee->e_df); 235 } 236 } 237 238 if (mode != SM_VERIFY) 239 openxscript(ee); 240 #ifdef LOG 241 if (LogLevel > 4) 242 syslog(LOG_INFO, "%s: clone %s", 243 ee->e_id, e->e_id); 244 #endif 245 } 246 } 247 248 if (owner != NULL) 249 { 250 setsender(owner, e, NULL, TRUE); 251 if (tTd(13, 5)) 252 { 253 printf("sendall(owner): QDONTSEND "); 254 printaddr(&e->e_from, FALSE); 255 } 256 e->e_from.q_flags |= QDONTSEND; 257 e->e_errormode = EM_MAIL; 258 } 259 260 # ifdef QUEUE 261 if ((mode == SM_QUEUE || mode == SM_FORK || 262 (mode != SM_VERIFY && SuperSafe)) && 263 !bitset(EF_INQUEUE, e->e_flags)) 264 { 265 /* be sure everything is instantiated in the queue */ 266 queueup(e, TRUE, announcequeueup); 267 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 268 queueup(ee, TRUE, announcequeueup); 269 } 270 #endif /* QUEUE */ 271 272 if (splitenv != NULL) 273 { 274 if (tTd(13, 1)) 275 { 276 printf("\nsendall: Split queue; remaining queue:\n"); 277 printaddr(e->e_sendqueue, TRUE); 278 } 279 280 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 281 { 282 CurEnv = ee; 283 sendenvelope(ee, mode); 284 } 285 286 CurEnv = e; 287 } 288 sendenvelope(e, mode); 289 290 for (; splitenv != NULL; splitenv = splitenv->e_sibling) 291 dropenvelope(splitenv); 292 } 293 294 sendenvelope(e, mode) 295 register ENVELOPE *e; 296 char mode; 297 { 298 bool oldverbose; 299 int pid; 300 register ADDRESS *q; 301 char *qf; 302 char *id; 303 304 /* 305 ** If we have had global, fatal errors, don't bother sending 306 ** the message at all if we are in SMTP mode. Local errors 307 ** (e.g., a single address failing) will still cause the other 308 ** addresses to be sent. 309 */ 310 311 if (bitset(EF_FATALERRS, e->e_flags) && OpMode == MD_SMTP) 312 { 313 e->e_flags |= EF_CLRQUEUE; 314 return; 315 } 316 317 oldverbose = Verbose; 318 switch (mode) 319 { 320 case SM_VERIFY: 321 Verbose = TRUE; 322 break; 323 324 case SM_QUEUE: 325 queueonly: 326 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 327 return; 328 329 case SM_FORK: 330 if (e->e_xfp != NULL) 331 (void) fflush(e->e_xfp); 332 333 # ifndef HASFLOCK 334 /* 335 ** Since fcntl locking has the interesting semantic that 336 ** the lock is owned by a process, not by an open file 337 ** descriptor, we have to flush this to the queue, and 338 ** then restart from scratch in the child. 339 */ 340 341 /* save id for future use */ 342 id = e->e_id; 343 344 /* now drop the envelope in the parent */ 345 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 346 e->e_flags &= ~EF_FATALERRS; 347 dropenvelope(e); 348 349 /* and reacquire in the child */ 350 (void) dowork(id, TRUE, FALSE, e); 351 352 return; 353 354 # else /* HASFLOCK */ 355 356 pid = fork(); 357 if (pid < 0) 358 { 359 goto queueonly; 360 } 361 else if (pid > 0) 362 { 363 /* be sure we leave the temp files to our child */ 364 /* can't call unlockqueue to avoid unlink of xfp */ 365 if (e->e_lockfp != NULL) 366 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 367 e->e_lockfp = NULL; 368 369 /* close any random open files in the envelope */ 370 closexscript(e); 371 if (e->e_dfp != NULL) 372 (void) xfclose(e->e_dfp, "sendenvelope", e->e_df); 373 e->e_dfp = NULL; 374 e->e_id = e->e_df = NULL; 375 return; 376 } 377 378 /* double fork to avoid zombies */ 379 if (fork() > 0) 380 exit(EX_OK); 381 382 /* be sure we are immune from the terminal */ 383 disconnect(1, e); 384 385 /* 386 ** Close any cached connections. 387 ** 388 ** We don't send the QUIT protocol because the parent 389 ** still knows about the connection. 390 ** 391 ** This should only happen when delivering an error 392 ** message. 393 */ 394 395 mci_flush(FALSE, NULL); 396 397 # endif /* HASFLOCK */ 398 399 break; 400 } 401 402 /* 403 ** Run through the list and send everything. 404 ** 405 ** Set EF_GLOBALERRS so that error messages during delivery 406 ** result in returned mail. 407 */ 408 409 e->e_nsent = 0; 410 e->e_flags |= EF_GLOBALERRS; 411 412 /* now run through the queue */ 413 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 414 { 415 #ifdef XDEBUG 416 char wbuf[MAXNAME + 20]; 417 418 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 419 checkfd012(wbuf); 420 #endif 421 if (mode == SM_VERIFY) 422 { 423 e->e_to = q->q_paddr; 424 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 425 { 426 message("deliverable: mailer %s, host %s, user %s", 427 q->q_mailer->m_name, 428 q->q_host, 429 q->q_user); 430 } 431 } 432 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 433 { 434 # ifdef QUEUE 435 /* 436 ** Checkpoint the send list every few addresses 437 */ 438 439 if (e->e_nsent >= CheckpointInterval) 440 { 441 queueup(e, TRUE, FALSE); 442 e->e_nsent = 0; 443 } 444 # endif /* QUEUE */ 445 (void) deliver(e, q); 446 } 447 } 448 Verbose = oldverbose; 449 450 #ifdef XDEBUG 451 checkfd012("end of sendenvelope"); 452 #endif 453 454 if (mode == SM_FORK) 455 finis(); 456 } 457 /* 458 ** DOFORK -- do a fork, retrying a couple of times on failure. 459 ** 460 ** This MUST be a macro, since after a vfork we are running 461 ** two processes on the same stack!!! 462 ** 463 ** Parameters: 464 ** none. 465 ** 466 ** Returns: 467 ** From a macro??? You've got to be kidding! 468 ** 469 ** Side Effects: 470 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 471 ** pid of child in parent, zero in child. 472 ** -1 on unrecoverable error. 473 ** 474 ** Notes: 475 ** I'm awfully sorry this looks so awful. That's 476 ** vfork for you..... 477 */ 478 479 # define NFORKTRIES 5 480 481 # ifndef FORK 482 # define FORK fork 483 # endif 484 485 # define DOFORK(fORKfN) \ 486 {\ 487 register int i;\ 488 \ 489 for (i = NFORKTRIES; --i >= 0; )\ 490 {\ 491 pid = fORKfN();\ 492 if (pid >= 0)\ 493 break;\ 494 if (i > 0)\ 495 sleep((unsigned) NFORKTRIES - i);\ 496 }\ 497 } 498 /* 499 ** DOFORK -- simple fork interface to DOFORK. 500 ** 501 ** Parameters: 502 ** none. 503 ** 504 ** Returns: 505 ** pid of child in parent. 506 ** zero in child. 507 ** -1 on error. 508 ** 509 ** Side Effects: 510 ** returns twice, once in parent and once in child. 511 */ 512 513 dofork() 514 { 515 register int pid; 516 517 DOFORK(fork); 518 return (pid); 519 } 520 /* 521 ** DELIVER -- Deliver a message to a list of addresses. 522 ** 523 ** This routine delivers to everyone on the same host as the 524 ** user on the head of the list. It is clever about mailers 525 ** that don't handle multiple users. It is NOT guaranteed 526 ** that it will deliver to all these addresses however -- so 527 ** deliver should be called once for each address on the 528 ** list. 529 ** 530 ** Parameters: 531 ** e -- the envelope to deliver. 532 ** firstto -- head of the address list to deliver to. 533 ** 534 ** Returns: 535 ** zero -- successfully delivered. 536 ** else -- some failure, see ExitStat for more info. 537 ** 538 ** Side Effects: 539 ** The standard input is passed off to someone. 540 */ 541 542 deliver(e, firstto) 543 register ENVELOPE *e; 544 ADDRESS *firstto; 545 { 546 char *host; /* host being sent to */ 547 char *user; /* user being sent to */ 548 char **pvp; 549 register char **mvp; 550 register char *p; 551 register MAILER *m; /* mailer for this recipient */ 552 ADDRESS *ctladdr; 553 register MCI *mci; 554 register ADDRESS *to = firstto; 555 bool clever = FALSE; /* running user smtp to this mailer */ 556 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 557 int rcode; /* response code */ 558 char *firstsig; /* signature of firstto */ 559 int pid; 560 char *curhost; 561 int mpvect[2]; 562 int rpvect[2]; 563 char *pv[MAXPV+1]; 564 char tobuf[TOBUFSIZE]; /* text line of to people */ 565 char buf[MAXNAME]; 566 char rpathbuf[MAXNAME]; /* translated return path */ 567 extern int checkcompat(); 568 extern FILE *fdopen(); 569 570 errno = 0; 571 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 572 return (0); 573 574 #ifdef NAMED_BIND 575 /* unless interactive, try twice, over a minute */ 576 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) { 577 _res.retrans = 30; 578 _res.retry = 2; 579 } 580 #endif 581 582 m = to->q_mailer; 583 host = to->q_host; 584 CurEnv = e; /* just in case */ 585 e->e_statmsg = NULL; 586 587 if (tTd(10, 1)) 588 printf("\n--deliver, mailer=%d, host=`%s', first user=`%s'\n", 589 m->m_mno, host, to->q_user); 590 591 /* 592 ** If this mailer is expensive, and if we don't want to make 593 ** connections now, just mark these addresses and return. 594 ** This is useful if we want to batch connections to 595 ** reduce load. This will cause the messages to be 596 ** queued up, and a daemon will come along to send the 597 ** messages later. 598 ** This should be on a per-mailer basis. 599 */ 600 601 if (NoConnect && bitnset(M_EXPENSIVE, m->m_flags) && !Verbose) 602 { 603 for (; to != NULL; to = to->q_next) 604 { 605 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 606 to->q_mailer != m) 607 continue; 608 to->q_flags |= QQUEUEUP; 609 e->e_to = to->q_paddr; 610 message("queued"); 611 if (LogLevel > 8) 612 logdelivery(m, NULL, "queued", e); 613 } 614 e->e_to = NULL; 615 return (0); 616 } 617 618 /* 619 ** Do initial argv setup. 620 ** Insert the mailer name. Notice that $x expansion is 621 ** NOT done on the mailer name. Then, if the mailer has 622 ** a picky -f flag, we insert it as appropriate. This 623 ** code does not check for 'pv' overflow; this places a 624 ** manifest lower limit of 4 for MAXPV. 625 ** The from address rewrite is expected to make 626 ** the address relative to the other end. 627 */ 628 629 /* rewrite from address, using rewriting rules */ 630 rcode = EX_OK; 631 (void) strcpy(rpathbuf, remotename(e->e_from.q_paddr, m, 632 RF_SENDERADDR|RF_CANONICAL, 633 &rcode, e)); 634 define('g', rpathbuf, e); /* translated return path */ 635 define('h', host, e); /* to host */ 636 Errors = 0; 637 pvp = pv; 638 *pvp++ = m->m_argv[0]; 639 640 /* insert -f or -r flag as appropriate */ 641 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 642 { 643 if (bitnset(M_FOPT, m->m_flags)) 644 *pvp++ = "-f"; 645 else 646 *pvp++ = "-r"; 647 *pvp++ = newstr(rpathbuf); 648 } 649 650 /* 651 ** Append the other fixed parts of the argv. These run 652 ** up to the first entry containing "$u". There can only 653 ** be one of these, and there are only a few more slots 654 ** in the pv after it. 655 */ 656 657 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 658 { 659 /* can't use strchr here because of sign extension problems */ 660 while (*p != '\0') 661 { 662 if ((*p++ & 0377) == MACROEXPAND) 663 { 664 if (*p == 'u') 665 break; 666 } 667 } 668 669 if (*p != '\0') 670 break; 671 672 /* this entry is safe -- go ahead and process it */ 673 expand(*mvp, buf, &buf[sizeof buf - 1], e); 674 *pvp++ = newstr(buf); 675 if (pvp >= &pv[MAXPV - 3]) 676 { 677 syserr("554 Too many parameters to %s before $u", pv[0]); 678 return (-1); 679 } 680 } 681 682 /* 683 ** If we have no substitution for the user name in the argument 684 ** list, we know that we must supply the names otherwise -- and 685 ** SMTP is the answer!! 686 */ 687 688 if (*mvp == NULL) 689 { 690 /* running SMTP */ 691 # ifdef SMTP 692 clever = TRUE; 693 *pvp = NULL; 694 # else /* SMTP */ 695 /* oops! we don't implement SMTP */ 696 syserr("554 SMTP style mailer"); 697 return (EX_SOFTWARE); 698 # endif /* SMTP */ 699 } 700 701 /* 702 ** At this point *mvp points to the argument with $u. We 703 ** run through our address list and append all the addresses 704 ** we can. If we run out of space, do not fret! We can 705 ** always send another copy later. 706 */ 707 708 tobuf[0] = '\0'; 709 e->e_to = tobuf; 710 ctladdr = NULL; 711 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 712 for (; to != NULL; to = to->q_next) 713 { 714 /* avoid sending multiple recipients to dumb mailers */ 715 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 716 break; 717 718 /* if already sent or not for this host, don't send */ 719 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 720 to->q_mailer != firstto->q_mailer || 721 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 722 continue; 723 724 /* avoid overflowing tobuf */ 725 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 726 break; 727 728 if (tTd(10, 1)) 729 { 730 printf("\nsend to "); 731 printaddr(to, FALSE); 732 } 733 734 /* compute effective uid/gid when sending */ 735 if (to->q_mailer == ProgMailer) 736 ctladdr = getctladdr(to); 737 738 user = to->q_user; 739 e->e_to = to->q_paddr; 740 if (tTd(10, 5)) 741 { 742 printf("deliver: QDONTSEND "); 743 printaddr(to, FALSE); 744 } 745 to->q_flags |= QDONTSEND; 746 747 /* 748 ** Check to see that these people are allowed to 749 ** talk to each other. 750 */ 751 752 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 753 { 754 NoReturn = TRUE; 755 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 756 giveresponse(EX_UNAVAILABLE, m, NULL, e); 757 continue; 758 } 759 rcode = checkcompat(to, e); 760 if (rcode != EX_OK) 761 { 762 markfailure(e, to, rcode); 763 giveresponse(rcode, m, NULL, e); 764 continue; 765 } 766 767 /* 768 ** Strip quote bits from names if the mailer is dumb 769 ** about them. 770 */ 771 772 if (bitnset(M_STRIPQ, m->m_flags)) 773 { 774 stripquotes(user); 775 stripquotes(host); 776 } 777 778 /* hack attack -- delivermail compatibility */ 779 if (m == ProgMailer && *user == '|') 780 user++; 781 782 /* 783 ** If an error message has already been given, don't 784 ** bother to send to this address. 785 ** 786 ** >>>>>>>>>> This clause assumes that the local mailer 787 ** >> NOTE >> cannot do any further aliasing; that 788 ** >>>>>>>>>> function is subsumed by sendmail. 789 */ 790 791 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 792 continue; 793 794 /* save statistics.... */ 795 markstats(e, to); 796 797 /* 798 ** See if this user name is "special". 799 ** If the user name has a slash in it, assume that this 800 ** is a file -- send it off without further ado. Note 801 ** that this type of addresses is not processed along 802 ** with the others, so we fudge on the To person. 803 */ 804 805 if (m == FileMailer) 806 { 807 rcode = mailfile(user, getctladdr(to), e); 808 giveresponse(rcode, m, NULL, e); 809 if (rcode == EX_OK) 810 to->q_flags |= QSENT; 811 continue; 812 } 813 814 /* 815 ** Address is verified -- add this user to mailer 816 ** argv, and add it to the print list of recipients. 817 */ 818 819 /* link together the chain of recipients */ 820 to->q_tchain = tochain; 821 tochain = to; 822 823 /* create list of users for error messages */ 824 (void) strcat(tobuf, ","); 825 (void) strcat(tobuf, to->q_paddr); 826 define('u', user, e); /* to user */ 827 p = to->q_home; 828 if (p == NULL && ctladdr != NULL) 829 p = ctladdr->q_home; 830 define('z', p, e); /* user's home */ 831 832 /* 833 ** Expand out this user into argument list. 834 */ 835 836 if (!clever) 837 { 838 expand(*mvp, buf, &buf[sizeof buf - 1], e); 839 *pvp++ = newstr(buf); 840 if (pvp >= &pv[MAXPV - 2]) 841 { 842 /* allow some space for trailing parms */ 843 break; 844 } 845 } 846 } 847 848 /* see if any addresses still exist */ 849 if (tobuf[0] == '\0') 850 { 851 define('g', (char *) NULL, e); 852 return (0); 853 } 854 855 /* print out messages as full list */ 856 e->e_to = tobuf + 1; 857 858 /* 859 ** Fill out any parameters after the $u parameter. 860 */ 861 862 while (!clever && *++mvp != NULL) 863 { 864 expand(*mvp, buf, &buf[sizeof buf - 1], e); 865 *pvp++ = newstr(buf); 866 if (pvp >= &pv[MAXPV]) 867 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 868 } 869 *pvp++ = NULL; 870 871 /* 872 ** Call the mailer. 873 ** The argument vector gets built, pipes 874 ** are created as necessary, and we fork & exec as 875 ** appropriate. 876 ** If we are running SMTP, we just need to clean up. 877 */ 878 879 if (ctladdr == NULL && m != ProgMailer) 880 ctladdr = &e->e_from; 881 #ifdef NAMED_BIND 882 if (ConfigLevel < 2) 883 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 884 #endif 885 886 if (tTd(11, 1)) 887 { 888 printf("openmailer:"); 889 printav(pv); 890 } 891 errno = 0; 892 893 CurHostName = m->m_mailer; 894 895 /* 896 ** Deal with the special case of mail handled through an IPC 897 ** connection. 898 ** In this case we don't actually fork. We must be 899 ** running SMTP for this to work. We will return a 900 ** zero pid to indicate that we are running IPC. 901 ** We also handle a debug version that just talks to stdin/out. 902 */ 903 904 curhost = NULL; 905 SmtpPhase = NULL; 906 907 #ifdef XDEBUG 908 { 909 char wbuf[MAXLINE]; 910 911 /* make absolutely certain 0, 1, and 2 are in use */ 912 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 913 checkfd012(wbuf); 914 } 915 #endif 916 917 918 /* check for Local Person Communication -- not for mortals!!! */ 919 if (strcmp(m->m_mailer, "[LPC]") == 0) 920 { 921 mci = (MCI *) xalloc(sizeof *mci); 922 bzero((char *) mci, sizeof *mci); 923 mci->mci_in = stdin; 924 mci->mci_out = stdout; 925 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 926 mci->mci_mailer = m; 927 } 928 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 929 strcmp(m->m_mailer, "[TCP]") == 0) 930 { 931 #ifdef DAEMON 932 register int i; 933 register u_short port; 934 935 CurHostName = pv[1]; 936 curhost = hostsignature(m, pv[1], e); 937 938 if (curhost == NULL || curhost[0] == '\0') 939 { 940 syserr("null signature"); 941 rcode = EX_OSERR; 942 goto give_up; 943 } 944 945 if (!clever) 946 { 947 syserr("554 non-clever IPC"); 948 rcode = EX_OSERR; 949 goto give_up; 950 } 951 if (pv[2] != NULL) 952 port = atoi(pv[2]); 953 else 954 port = 0; 955 tryhost: 956 mci = NULL; 957 while (*curhost != '\0') 958 { 959 register char *p; 960 static char hostbuf[MAXNAME]; 961 962 mci = NULL; 963 964 /* pull the next host from the signature */ 965 p = strchr(curhost, ':'); 966 if (p == NULL) 967 p = &curhost[strlen(curhost)]; 968 strncpy(hostbuf, curhost, p - curhost); 969 hostbuf[p - curhost] = '\0'; 970 if (*p != '\0') 971 p++; 972 curhost = p; 973 974 /* see if we already know that this host is fried */ 975 CurHostName = hostbuf; 976 mci = mci_get(hostbuf, m); 977 if (mci->mci_state != MCIS_CLOSED) 978 { 979 if (tTd(11, 1)) 980 { 981 printf("openmailer: "); 982 mci_dump(mci); 983 } 984 CurHostName = mci->mci_host; 985 break; 986 } 987 mci->mci_mailer = m; 988 if (mci->mci_exitstat != EX_OK) 989 continue; 990 991 /* try the connection */ 992 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 993 message("Connecting to %s (%s)...", 994 hostbuf, m->m_name); 995 i = makeconnection(hostbuf, port, mci, 996 bitnset(M_SECURE_PORT, m->m_flags)); 997 mci->mci_exitstat = i; 998 mci->mci_errno = errno; 999 #ifdef NAMED_BIND 1000 mci->mci_herrno = h_errno; 1001 #endif 1002 if (i == EX_OK) 1003 { 1004 mci->mci_state = MCIS_OPENING; 1005 mci_cache(mci); 1006 if (TrafficLogFile != NULL) 1007 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1008 getpid(), hostbuf); 1009 break; 1010 } 1011 else if (tTd(11, 1)) 1012 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1013 i, errno); 1014 1015 1016 /* enter status of this host */ 1017 setstat(i); 1018 } 1019 mci->mci_pid = 0; 1020 #else /* no DAEMON */ 1021 syserr("554 openmailer: no IPC"); 1022 if (tTd(11, 1)) 1023 printf("openmailer: NULL\n"); 1024 return NULL; 1025 #endif /* DAEMON */ 1026 } 1027 else 1028 { 1029 if (TrafficLogFile != NULL) 1030 { 1031 char **av; 1032 1033 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1034 for (av = pv; *av != NULL; av++) 1035 fprintf(TrafficLogFile, " %s", *av); 1036 fprintf(TrafficLogFile, "\n"); 1037 } 1038 1039 /* create a pipe to shove the mail through */ 1040 if (pipe(mpvect) < 0) 1041 { 1042 syserr("%s... openmailer(%s): pipe (to mailer)", 1043 e->e_to, m->m_name); 1044 if (tTd(11, 1)) 1045 printf("openmailer: NULL\n"); 1046 rcode = EX_OSERR; 1047 goto give_up; 1048 } 1049 1050 /* if this mailer speaks smtp, create a return pipe */ 1051 if (clever && pipe(rpvect) < 0) 1052 { 1053 syserr("%s... openmailer(%s): pipe (from mailer)", 1054 e->e_to, m->m_name); 1055 (void) close(mpvect[0]); 1056 (void) close(mpvect[1]); 1057 if (tTd(11, 1)) 1058 printf("openmailer: NULL\n"); 1059 rcode = EX_OSERR; 1060 goto give_up; 1061 } 1062 1063 /* 1064 ** Actually fork the mailer process. 1065 ** DOFORK is clever about retrying. 1066 ** 1067 ** Dispose of SIGCHLD signal catchers that may be laying 1068 ** around so that endmail will get it. 1069 */ 1070 1071 if (e->e_xfp != NULL) 1072 (void) fflush(e->e_xfp); /* for debugging */ 1073 (void) fflush(stdout); 1074 # ifdef SIGCHLD 1075 (void) setsignal(SIGCHLD, SIG_DFL); 1076 # endif /* SIGCHLD */ 1077 DOFORK(FORK); 1078 /* pid is set by DOFORK */ 1079 if (pid < 0) 1080 { 1081 /* failure */ 1082 syserr("%s... openmailer(%s): cannot fork", 1083 e->e_to, m->m_name); 1084 (void) close(mpvect[0]); 1085 (void) close(mpvect[1]); 1086 if (clever) 1087 { 1088 (void) close(rpvect[0]); 1089 (void) close(rpvect[1]); 1090 } 1091 if (tTd(11, 1)) 1092 printf("openmailer: NULL\n"); 1093 rcode = EX_OSERR; 1094 goto give_up; 1095 } 1096 else if (pid == 0) 1097 { 1098 int i; 1099 int saveerrno; 1100 char **ep; 1101 char *env[MAXUSERENVIRON]; 1102 extern char **environ; 1103 extern int DtableSize; 1104 1105 /* child -- set up input & exec mailer */ 1106 (void) setsignal(SIGINT, SIG_IGN); 1107 (void) setsignal(SIGHUP, SIG_IGN); 1108 (void) setsignal(SIGTERM, SIG_DFL); 1109 1110 /* close any other cached connections */ 1111 mci_flush(FALSE, mci); 1112 1113 /* reset user and group */ 1114 if (!bitnset(M_RESTR, m->m_flags)) 1115 { 1116 if (ctladdr == NULL || ctladdr->q_uid == 0) 1117 { 1118 (void) initgroups(DefUser, DefGid); 1119 (void) setuid(DefUid); 1120 } 1121 else 1122 { 1123 (void) initgroups(ctladdr->q_ruser? 1124 ctladdr->q_ruser: ctladdr->q_user, 1125 ctladdr->q_gid); 1126 (void) setuid(ctladdr->q_uid); 1127 } 1128 } 1129 1130 if (tTd(11, 2)) 1131 printf("openmailer: running as r/euid=%d/%d\n", 1132 getuid(), geteuid()); 1133 1134 /* move into some "safe" directory */ 1135 if (m->m_execdir != NULL) 1136 { 1137 char *p, *q; 1138 char buf[MAXLINE]; 1139 1140 for (p = m->m_execdir; p != NULL; p = q) 1141 { 1142 q = strchr(p, ':'); 1143 if (q != NULL) 1144 *q = '\0'; 1145 expand(p, buf, &buf[sizeof buf] - 1, e); 1146 if (q != NULL) 1147 *q++ = ':'; 1148 if (tTd(11, 20)) 1149 printf("openmailer: trydir %s\n", 1150 buf); 1151 if (buf[0] != '\0' && chdir(buf) >= 0) 1152 break; 1153 } 1154 } 1155 1156 /* arrange to filter std & diag output of command */ 1157 if (clever) 1158 { 1159 (void) close(rpvect[0]); 1160 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1161 { 1162 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1163 e->e_to, m->m_name, rpvect[1]); 1164 _exit(EX_OSERR); 1165 } 1166 (void) close(rpvect[1]); 1167 } 1168 else if (OpMode == MD_SMTP || HoldErrs) 1169 { 1170 /* put mailer output in transcript */ 1171 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1172 { 1173 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1174 e->e_to, m->m_name, 1175 fileno(e->e_xfp)); 1176 _exit(EX_OSERR); 1177 } 1178 } 1179 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1180 { 1181 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1182 e->e_to, m->m_name); 1183 _exit(EX_OSERR); 1184 } 1185 1186 /* arrange to get standard input */ 1187 (void) close(mpvect[1]); 1188 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1189 { 1190 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1191 e->e_to, m->m_name, mpvect[0]); 1192 _exit(EX_OSERR); 1193 } 1194 (void) close(mpvect[0]); 1195 1196 /* arrange for all the files to be closed */ 1197 for (i = 3; i < DtableSize; i++) 1198 { 1199 register int j; 1200 1201 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1202 (void) fcntl(i, F_SETFD, j | 1); 1203 } 1204 1205 /* set up the mailer environment */ 1206 i = 0; 1207 env[i++] = "AGENT=sendmail"; 1208 for (ep = environ; *ep != NULL; ep++) 1209 { 1210 if (strncmp(*ep, "TZ=", 3) == 0) 1211 env[i++] = *ep; 1212 } 1213 env[i++] = NULL; 1214 1215 /* try to execute the mailer */ 1216 execve(m->m_mailer, pv, env); 1217 saveerrno = errno; 1218 syserr("Cannot exec %s", m->m_mailer); 1219 if (m == LocalMailer || transienterror(saveerrno)) 1220 _exit(EX_OSERR); 1221 _exit(EX_UNAVAILABLE); 1222 } 1223 1224 /* 1225 ** Set up return value. 1226 */ 1227 1228 mci = (MCI *) xalloc(sizeof *mci); 1229 bzero((char *) mci, sizeof *mci); 1230 mci->mci_mailer = m; 1231 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1232 mci->mci_pid = pid; 1233 (void) close(mpvect[0]); 1234 mci->mci_out = fdopen(mpvect[1], "w"); 1235 if (clever) 1236 { 1237 (void) close(rpvect[1]); 1238 mci->mci_in = fdopen(rpvect[0], "r"); 1239 } 1240 else 1241 { 1242 mci->mci_flags |= MCIF_TEMP; 1243 mci->mci_in = NULL; 1244 } 1245 } 1246 1247 /* 1248 ** If we are in SMTP opening state, send initial protocol. 1249 */ 1250 1251 if (clever && mci->mci_state != MCIS_CLOSED) 1252 { 1253 smtpinit(m, mci, e); 1254 } 1255 if (tTd(11, 1)) 1256 { 1257 printf("openmailer: "); 1258 mci_dump(mci); 1259 } 1260 1261 if (mci->mci_state != MCIS_OPEN) 1262 { 1263 /* couldn't open the mailer */ 1264 rcode = mci->mci_exitstat; 1265 errno = mci->mci_errno; 1266 #ifdef NAMED_BIND 1267 h_errno = mci->mci_herrno; 1268 #endif 1269 if (rcode == EX_OK) 1270 { 1271 /* shouldn't happen */ 1272 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1273 rcode, mci->mci_state, firstsig); 1274 rcode = EX_SOFTWARE; 1275 } 1276 else if (rcode == EX_TEMPFAIL && *curhost != '\0') 1277 { 1278 /* try next MX site */ 1279 goto tryhost; 1280 } 1281 } 1282 else if (!clever) 1283 { 1284 /* 1285 ** Format and send message. 1286 */ 1287 1288 putfromline(mci->mci_out, m, e); 1289 (*e->e_puthdr)(mci->mci_out, m, e); 1290 putline("\n", mci->mci_out, m); 1291 (*e->e_putbody)(mci->mci_out, m, e, NULL); 1292 1293 /* get the exit status */ 1294 rcode = endmailer(mci, e, pv); 1295 } 1296 else 1297 #ifdef SMTP 1298 { 1299 /* 1300 ** Send the MAIL FROM: protocol 1301 */ 1302 1303 rcode = smtpmailfrom(m, mci, e); 1304 if (rcode == EX_OK) 1305 { 1306 register char *t = tobuf; 1307 register int i; 1308 1309 /* send the recipient list */ 1310 tobuf[0] = '\0'; 1311 for (to = tochain; to != NULL; to = to->q_tchain) 1312 { 1313 e->e_to = to->q_paddr; 1314 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1315 { 1316 markfailure(e, to, i); 1317 giveresponse(i, m, mci, e); 1318 } 1319 else 1320 { 1321 *t++ = ','; 1322 for (p = to->q_paddr; *p; *t++ = *p++) 1323 continue; 1324 *t = '\0'; 1325 } 1326 } 1327 1328 /* now send the data */ 1329 if (tobuf[0] == '\0') 1330 { 1331 rcode = EX_OK; 1332 e->e_to = NULL; 1333 if (bitset(MCIF_CACHED, mci->mci_flags)) 1334 smtprset(m, mci, e); 1335 } 1336 else 1337 { 1338 e->e_to = tobuf + 1; 1339 rcode = smtpdata(m, mci, e); 1340 } 1341 1342 /* now close the connection */ 1343 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1344 smtpquit(m, mci, e); 1345 } 1346 if (rcode != EX_OK && *curhost != '\0') 1347 { 1348 /* try next MX site */ 1349 goto tryhost; 1350 } 1351 } 1352 #else /* not SMTP */ 1353 { 1354 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1355 rcode = EX_CONFIG; 1356 goto give_up; 1357 } 1358 #endif /* SMTP */ 1359 #ifdef NAMED_BIND 1360 if (ConfigLevel < 2) 1361 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1362 #endif 1363 1364 /* arrange a return receipt if requested */ 1365 if (e->e_receiptto != NULL && bitnset(M_LOCALMAILER, m->m_flags)) 1366 { 1367 e->e_flags |= EF_SENDRECEIPT; 1368 /* do we want to send back more info? */ 1369 } 1370 1371 /* 1372 ** Do final status disposal. 1373 ** We check for something in tobuf for the SMTP case. 1374 ** If we got a temporary failure, arrange to queue the 1375 ** addressees. 1376 */ 1377 1378 give_up: 1379 if (tobuf[0] != '\0') 1380 giveresponse(rcode, m, mci, e); 1381 for (to = tochain; to != NULL; to = to->q_tchain) 1382 { 1383 if (rcode != EX_OK) 1384 markfailure(e, to, rcode); 1385 else 1386 { 1387 to->q_flags |= QSENT; 1388 e->e_nsent++; 1389 } 1390 } 1391 1392 /* 1393 ** Restore state and return. 1394 */ 1395 1396 #ifdef XDEBUG 1397 { 1398 char wbuf[MAXLINE]; 1399 1400 /* make absolutely certain 0, 1, and 2 are in use */ 1401 sprintf(wbuf, "%s... end of deliver(%s)", 1402 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1403 m->m_name); 1404 checkfd012(wbuf); 1405 } 1406 #endif 1407 1408 errno = 0; 1409 define('g', (char *) NULL, e); 1410 return (rcode); 1411 } 1412 /* 1413 ** MARKFAILURE -- mark a failure on a specific address. 1414 ** 1415 ** Parameters: 1416 ** e -- the envelope we are sending. 1417 ** q -- the address to mark. 1418 ** rcode -- the code signifying the particular failure. 1419 ** 1420 ** Returns: 1421 ** none. 1422 ** 1423 ** Side Effects: 1424 ** marks the address (and possibly the envelope) with the 1425 ** failure so that an error will be returned or 1426 ** the message will be queued, as appropriate. 1427 */ 1428 1429 markfailure(e, q, rcode) 1430 register ENVELOPE *e; 1431 register ADDRESS *q; 1432 int rcode; 1433 { 1434 char buf[MAXLINE]; 1435 1436 if (rcode == EX_OK) 1437 return; 1438 else if (rcode == EX_TEMPFAIL) 1439 q->q_flags |= QQUEUEUP; 1440 else if (rcode != EX_IOERR && rcode != EX_OSERR) 1441 q->q_flags |= QBADADDR; 1442 } 1443 /* 1444 ** ENDMAILER -- Wait for mailer to terminate. 1445 ** 1446 ** We should never get fatal errors (e.g., segmentation 1447 ** violation), so we report those specially. For other 1448 ** errors, we choose a status message (into statmsg), 1449 ** and if it represents an error, we print it. 1450 ** 1451 ** Parameters: 1452 ** pid -- pid of mailer. 1453 ** e -- the current envelope. 1454 ** pv -- the parameter vector that invoked the mailer 1455 ** (for error messages). 1456 ** 1457 ** Returns: 1458 ** exit code of mailer. 1459 ** 1460 ** Side Effects: 1461 ** none. 1462 */ 1463 1464 endmailer(mci, e, pv) 1465 register MCI *mci; 1466 register ENVELOPE *e; 1467 char **pv; 1468 { 1469 int st; 1470 1471 /* close any connections */ 1472 if (mci->mci_in != NULL) 1473 (void) xfclose(mci->mci_in, pv[0], "mci_in"); 1474 if (mci->mci_out != NULL) 1475 (void) xfclose(mci->mci_out, pv[0], "mci_out"); 1476 mci->mci_in = mci->mci_out = NULL; 1477 mci->mci_state = MCIS_CLOSED; 1478 1479 /* in the IPC case there is nothing to wait for */ 1480 if (mci->mci_pid == 0) 1481 return (EX_OK); 1482 1483 /* wait for the mailer process to die and collect status */ 1484 st = waitfor(mci->mci_pid); 1485 if (st == -1) 1486 { 1487 syserr("endmailer %s: wait", pv[0]); 1488 return (EX_SOFTWARE); 1489 } 1490 1491 if (WIFEXITED(st)) 1492 { 1493 /* normal death -- return status */ 1494 return (WEXITSTATUS(st)); 1495 } 1496 1497 /* it died a horrid death */ 1498 syserr("mailer %s died with signal %o", pv[0], st); 1499 1500 /* log the arguments */ 1501 if (e->e_xfp != NULL) 1502 { 1503 register char **av; 1504 1505 fprintf(e->e_xfp, "Arguments:"); 1506 for (av = pv; *av != NULL; av++) 1507 fprintf(e->e_xfp, " %s", *av); 1508 fprintf(e->e_xfp, "\n"); 1509 } 1510 1511 ExitStat = EX_TEMPFAIL; 1512 return (EX_TEMPFAIL); 1513 } 1514 /* 1515 ** GIVERESPONSE -- Interpret an error response from a mailer 1516 ** 1517 ** Parameters: 1518 ** stat -- the status code from the mailer (high byte 1519 ** only; core dumps must have been taken care of 1520 ** already). 1521 ** m -- the mailer info for this mailer. 1522 ** mci -- the mailer connection info -- can be NULL if the 1523 ** response is given before the connection is made. 1524 ** e -- the current envelope. 1525 ** 1526 ** Returns: 1527 ** none. 1528 ** 1529 ** Side Effects: 1530 ** Errors may be incremented. 1531 ** ExitStat may be set. 1532 */ 1533 1534 giveresponse(stat, m, mci, e) 1535 int stat; 1536 register MAILER *m; 1537 register MCI *mci; 1538 ENVELOPE *e; 1539 { 1540 register const char *statmsg; 1541 extern char *SysExMsg[]; 1542 register int i; 1543 extern int N_SysEx; 1544 char buf[MAXLINE]; 1545 1546 /* 1547 ** Compute status message from code. 1548 */ 1549 1550 i = stat - EX__BASE; 1551 if (stat == 0) 1552 { 1553 statmsg = "250 Sent"; 1554 if (e->e_statmsg != NULL) 1555 { 1556 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1557 statmsg = buf; 1558 } 1559 } 1560 else if (i < 0 || i > N_SysEx) 1561 { 1562 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1563 stat = EX_UNAVAILABLE; 1564 statmsg = buf; 1565 } 1566 else if (stat == EX_TEMPFAIL) 1567 { 1568 (void) strcpy(buf, SysExMsg[i] + 1); 1569 #ifdef NAMED_BIND 1570 if (h_errno == TRY_AGAIN) 1571 statmsg = errstring(h_errno+E_DNSBASE); 1572 else 1573 #endif 1574 { 1575 if (errno != 0) 1576 statmsg = errstring(errno); 1577 else 1578 { 1579 #ifdef SMTP 1580 extern char SmtpError[]; 1581 1582 statmsg = SmtpError; 1583 #else /* SMTP */ 1584 statmsg = NULL; 1585 #endif /* SMTP */ 1586 } 1587 } 1588 if (statmsg != NULL && statmsg[0] != '\0') 1589 { 1590 (void) strcat(buf, ": "); 1591 (void) strcat(buf, statmsg); 1592 } 1593 statmsg = buf; 1594 } 1595 #ifdef NAMED_BIND 1596 else if (stat == EX_NOHOST && h_errno != 0) 1597 { 1598 statmsg = errstring(h_errno + E_DNSBASE); 1599 (void) sprintf(buf, "%s (%s)", SysExMsg[i], statmsg); 1600 statmsg = buf; 1601 } 1602 #endif 1603 else 1604 { 1605 statmsg = SysExMsg[i]; 1606 if (*statmsg++ == ':') 1607 { 1608 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1609 statmsg = buf; 1610 } 1611 } 1612 1613 /* 1614 ** Print the message as appropriate 1615 */ 1616 1617 if (stat == EX_OK || stat == EX_TEMPFAIL) 1618 message(&statmsg[4], errstring(errno)); 1619 else 1620 { 1621 Errors++; 1622 usrerr(statmsg, errstring(errno)); 1623 } 1624 1625 /* 1626 ** Final cleanup. 1627 ** Log a record of the transaction. Compute the new 1628 ** ExitStat -- if we already had an error, stick with 1629 ** that. 1630 */ 1631 1632 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1633 logdelivery(m, mci, &statmsg[4], e); 1634 1635 if (stat != EX_TEMPFAIL) 1636 setstat(stat); 1637 if (stat != EX_OK) 1638 { 1639 if (e->e_message != NULL) 1640 free(e->e_message); 1641 e->e_message = newstr(&statmsg[4]); 1642 } 1643 errno = 0; 1644 #ifdef NAMED_BIND 1645 h_errno = 0; 1646 #endif 1647 } 1648 /* 1649 ** LOGDELIVERY -- log the delivery in the system log 1650 ** 1651 ** Parameters: 1652 ** m -- the mailer info. Can be NULL for initial queue. 1653 ** mci -- the mailer connection info -- can be NULL if the 1654 ** log is occuring when no connection is active. 1655 ** stat -- the message to print for the status. 1656 ** e -- the current envelope. 1657 ** 1658 ** Returns: 1659 ** none 1660 ** 1661 ** Side Effects: 1662 ** none 1663 */ 1664 1665 logdelivery(m, mci, stat, e) 1666 MAILER *m; 1667 register MCI *mci; 1668 char *stat; 1669 register ENVELOPE *e; 1670 { 1671 # ifdef LOG 1672 char buf[512]; 1673 1674 (void) sprintf(buf, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1675 1676 if (m != NULL) 1677 { 1678 (void) strcat(buf, ", mailer="); 1679 (void) strcat(buf, m->m_name); 1680 } 1681 1682 if (mci != NULL && mci->mci_host != NULL) 1683 { 1684 # ifdef DAEMON 1685 extern SOCKADDR CurHostAddr; 1686 # endif 1687 1688 (void) strcat(buf, ", relay="); 1689 (void) strcat(buf, mci->mci_host); 1690 1691 # ifdef DAEMON 1692 (void) strcat(buf, " ("); 1693 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 1694 (void) strcat(buf, ")"); 1695 # endif 1696 } 1697 else 1698 { 1699 char *p = macvalue('h', e); 1700 1701 if (p != NULL && p[0] != '\0') 1702 { 1703 (void) strcat(buf, ", relay="); 1704 (void) strcat(buf, p); 1705 } 1706 } 1707 1708 syslog(LOG_INFO, "%s: to=%s, %s, stat=%s", 1709 e->e_id, e->e_to, buf, stat); 1710 # endif /* LOG */ 1711 } 1712 /* 1713 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1714 ** 1715 ** This can be made an arbitrary message separator by changing $l 1716 ** 1717 ** One of the ugliest hacks seen by human eyes is contained herein: 1718 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1719 ** does a well-meaning programmer such as myself have to deal with 1720 ** this kind of antique garbage???? 1721 ** 1722 ** Parameters: 1723 ** fp -- the file to output to. 1724 ** m -- the mailer describing this entry. 1725 ** 1726 ** Returns: 1727 ** none 1728 ** 1729 ** Side Effects: 1730 ** outputs some text to fp. 1731 */ 1732 1733 putfromline(fp, m, e) 1734 register FILE *fp; 1735 register MAILER *m; 1736 ENVELOPE *e; 1737 { 1738 char *template = "\201l\n"; 1739 char buf[MAXLINE]; 1740 1741 if (bitnset(M_NHDR, m->m_flags)) 1742 return; 1743 1744 # ifdef UGLYUUCP 1745 if (bitnset(M_UGLYUUCP, m->m_flags)) 1746 { 1747 char *bang; 1748 char xbuf[MAXLINE]; 1749 1750 expand("\201g", buf, &buf[sizeof buf - 1], e); 1751 bang = strchr(buf, '!'); 1752 if (bang == NULL) 1753 { 1754 errno = 0; 1755 syserr("554 No ! in UUCP From address! (%s given)", buf); 1756 } 1757 else 1758 { 1759 *bang++ = '\0'; 1760 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1761 template = xbuf; 1762 } 1763 } 1764 # endif /* UGLYUUCP */ 1765 expand(template, buf, &buf[sizeof buf - 1], e); 1766 putline(buf, fp, m); 1767 } 1768 /* 1769 ** PUTBODY -- put the body of a message. 1770 ** 1771 ** Parameters: 1772 ** fp -- file to output onto. 1773 ** m -- a mailer descriptor to control output format. 1774 ** e -- the envelope to put out. 1775 ** separator -- if non-NULL, a message separator that must 1776 ** not be permitted in the resulting message. 1777 ** 1778 ** Returns: 1779 ** none. 1780 ** 1781 ** Side Effects: 1782 ** The message is written onto fp. 1783 */ 1784 1785 putbody(fp, m, e, separator) 1786 FILE *fp; 1787 MAILER *m; 1788 register ENVELOPE *e; 1789 char *separator; 1790 { 1791 char buf[MAXLINE]; 1792 1793 /* 1794 ** Output the body of the message 1795 */ 1796 1797 if (e->e_dfp == NULL) 1798 { 1799 if (e->e_df != NULL) 1800 { 1801 e->e_dfp = fopen(e->e_df, "r"); 1802 if (e->e_dfp == NULL) 1803 syserr("putbody: Cannot open %s for %s from %s", 1804 e->e_df, e->e_to, e->e_from.q_paddr); 1805 } 1806 else 1807 putline("<<< No Message Collected >>>", fp, m); 1808 } 1809 if (e->e_dfp != NULL) 1810 { 1811 rewind(e->e_dfp); 1812 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1813 { 1814 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1815 strncmp(buf, "From ", 5) == 0) 1816 (void) putc('>', fp); 1817 if (buf[0] == '-' && buf[1] == '-' && separator != NULL) 1818 { 1819 /* possible separator */ 1820 int sl = strlen(separator); 1821 1822 if (strncmp(&buf[2], separator, sl) == 0) 1823 (void) putc(' ', fp); 1824 } 1825 putline(buf, fp, m); 1826 } 1827 1828 if (ferror(e->e_dfp)) 1829 { 1830 syserr("putbody: read error"); 1831 ExitStat = EX_IOERR; 1832 } 1833 } 1834 1835 /* some mailers want extra blank line at end of message */ 1836 if (bitnset(M_BLANKEND, m->m_flags) && buf[0] != '\0' && buf[0] != '\n') 1837 putline("", fp, m); 1838 1839 (void) fflush(fp); 1840 if (ferror(fp) && errno != EPIPE) 1841 { 1842 syserr("putbody: write error"); 1843 ExitStat = EX_IOERR; 1844 } 1845 errno = 0; 1846 } 1847 /* 1848 ** MAILFILE -- Send a message to a file. 1849 ** 1850 ** If the file has the setuid/setgid bits set, but NO execute 1851 ** bits, sendmail will try to become the owner of that file 1852 ** rather than the real user. Obviously, this only works if 1853 ** sendmail runs as root. 1854 ** 1855 ** This could be done as a subordinate mailer, except that it 1856 ** is used implicitly to save messages in ~/dead.letter. We 1857 ** view this as being sufficiently important as to include it 1858 ** here. For example, if the system is dying, we shouldn't have 1859 ** to create another process plus some pipes to save the message. 1860 ** 1861 ** Parameters: 1862 ** filename -- the name of the file to send to. 1863 ** ctladdr -- the controlling address header -- includes 1864 ** the userid/groupid to be when sending. 1865 ** 1866 ** Returns: 1867 ** The exit code associated with the operation. 1868 ** 1869 ** Side Effects: 1870 ** none. 1871 */ 1872 1873 mailfile(filename, ctladdr, e) 1874 char *filename; 1875 ADDRESS *ctladdr; 1876 register ENVELOPE *e; 1877 { 1878 register FILE *f; 1879 register int pid; 1880 int mode; 1881 1882 if (tTd(11, 1)) 1883 { 1884 printf("mailfile %s\n ctladdr=", filename); 1885 printaddr(ctladdr, FALSE); 1886 } 1887 1888 if (e->e_xfp != NULL) 1889 fflush(e->e_xfp); 1890 1891 /* 1892 ** Fork so we can change permissions here. 1893 ** Note that we MUST use fork, not vfork, because of 1894 ** the complications of calling subroutines, etc. 1895 */ 1896 1897 DOFORK(fork); 1898 1899 if (pid < 0) 1900 return (EX_OSERR); 1901 else if (pid == 0) 1902 { 1903 /* child -- actually write to file */ 1904 struct stat stb; 1905 1906 (void) setsignal(SIGINT, SIG_DFL); 1907 (void) setsignal(SIGHUP, SIG_DFL); 1908 (void) setsignal(SIGTERM, SIG_DFL); 1909 (void) umask(OldUmask); 1910 1911 if (stat(filename, &stb) < 0) 1912 stb.st_mode = FileMode; 1913 mode = stb.st_mode; 1914 1915 /* limit the errors to those actually caused in the child */ 1916 errno = 0; 1917 ExitStat = EX_OK; 1918 1919 if (bitset(0111, stb.st_mode)) 1920 exit(EX_CANTCREAT); 1921 if (ctladdr == NULL) 1922 ctladdr = &e->e_from; 1923 else 1924 { 1925 /* ignore setuid and setgid bits */ 1926 mode &= ~(S_ISGID|S_ISUID); 1927 } 1928 1929 /* we have to open the dfile BEFORE setuid */ 1930 if (e->e_dfp == NULL && e->e_df != NULL) 1931 { 1932 e->e_dfp = fopen(e->e_df, "r"); 1933 if (e->e_dfp == NULL) 1934 { 1935 syserr("mailfile: Cannot open %s for %s from %s", 1936 e->e_df, e->e_to, e->e_from.q_paddr); 1937 } 1938 } 1939 1940 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1941 { 1942 if (ctladdr->q_uid == 0) 1943 { 1944 (void) initgroups(DefUser, DefGid); 1945 } 1946 else 1947 { 1948 (void) initgroups(ctladdr->q_ruser ? 1949 ctladdr->q_ruser : ctladdr->q_user, 1950 ctladdr->q_gid); 1951 } 1952 } 1953 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1954 { 1955 if (ctladdr->q_uid == 0) 1956 (void) setuid(DefUid); 1957 else 1958 (void) setuid(ctladdr->q_uid); 1959 } 1960 FileName = filename; 1961 LineNumber = 0; 1962 f = dfopen(filename, O_WRONLY|O_CREAT|O_APPEND, FileMode); 1963 if (f == NULL) 1964 { 1965 message("554 cannot open: %s", errstring(errno)); 1966 exit(EX_CANTCREAT); 1967 } 1968 1969 putfromline(f, FileMailer, e); 1970 (*e->e_puthdr)(f, FileMailer, e); 1971 putline("\n", f, FileMailer); 1972 (*e->e_putbody)(f, FileMailer, e, NULL); 1973 putline("\n", f, FileMailer); 1974 if (ferror(f)) 1975 { 1976 message("451 I/O error: %s", errstring(errno)); 1977 setstat(EX_IOERR); 1978 } 1979 (void) xfclose(f, "mailfile", filename); 1980 (void) fflush(stdout); 1981 1982 /* reset ISUID & ISGID bits for paranoid systems */ 1983 (void) chmod(filename, (int) stb.st_mode); 1984 exit(ExitStat); 1985 /*NOTREACHED*/ 1986 } 1987 else 1988 { 1989 /* parent -- wait for exit status */ 1990 int st; 1991 1992 st = waitfor(pid); 1993 if (WIFEXITED(st)) 1994 return (WEXITSTATUS(st)); 1995 else 1996 { 1997 syserr("child died on signal %d", st); 1998 return (EX_UNAVAILABLE); 1999 } 2000 /*NOTREACHED*/ 2001 } 2002 } 2003 /* 2004 ** HOSTSIGNATURE -- return the "signature" for a host. 2005 ** 2006 ** The signature describes how we are going to send this -- it 2007 ** can be just the hostname (for non-Internet hosts) or can be 2008 ** an ordered list of MX hosts. 2009 ** 2010 ** Parameters: 2011 ** m -- the mailer describing this host. 2012 ** host -- the host name. 2013 ** e -- the current envelope. 2014 ** 2015 ** Returns: 2016 ** The signature for this host. 2017 ** 2018 ** Side Effects: 2019 ** Can tweak the symbol table. 2020 */ 2021 2022 char * 2023 hostsignature(m, host, e) 2024 register MAILER *m; 2025 char *host; 2026 ENVELOPE *e; 2027 { 2028 register char *p; 2029 register STAB *s; 2030 int i; 2031 int len; 2032 #ifdef NAMED_BIND 2033 int nmx; 2034 auto int rcode; 2035 char *hp; 2036 char *endp; 2037 int oldoptions; 2038 char *mxhosts[MAXMXHOSTS + 1]; 2039 #endif 2040 2041 /* 2042 ** Check to see if this uses IPC -- if not, it can't have MX records. 2043 */ 2044 2045 p = m->m_mailer; 2046 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2047 { 2048 /* just an ordinary mailer */ 2049 return host; 2050 } 2051 2052 /* 2053 ** Look it up in the symbol table. 2054 */ 2055 2056 s = stab(host, ST_HOSTSIG, ST_ENTER); 2057 if (s->s_hostsig != NULL) 2058 return s->s_hostsig; 2059 2060 /* 2061 ** Not already there -- create a signature. 2062 */ 2063 2064 #ifdef NAMED_BIND 2065 if (ConfigLevel < 2) 2066 { 2067 oldoptions = _res.options; 2068 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2069 } 2070 2071 for (hp = host; hp != NULL; hp = endp) 2072 { 2073 endp = strchr(hp, ':'); 2074 if (endp != NULL) 2075 *endp = '\0'; 2076 2077 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2078 2079 if (nmx <= 0) 2080 { 2081 register MCI *mci; 2082 extern int errno; 2083 2084 /* update the connection info for this host */ 2085 mci = mci_get(hp, m); 2086 mci->mci_exitstat = rcode; 2087 mci->mci_errno = errno; 2088 #ifdef NAMED_BIND 2089 mci->mci_herrno = h_errno; 2090 #endif 2091 2092 /* and return the original host name as the signature */ 2093 nmx = 1; 2094 mxhosts[0] = hp; 2095 } 2096 2097 len = 0; 2098 for (i = 0; i < nmx; i++) 2099 { 2100 len += strlen(mxhosts[i]) + 1; 2101 } 2102 if (s->s_hostsig != NULL) 2103 len += strlen(s->s_hostsig) + 1; 2104 p = xalloc(len); 2105 if (s->s_hostsig != NULL) 2106 { 2107 (void) strcpy(p, s->s_hostsig); 2108 free(s->s_hostsig); 2109 s->s_hostsig = p; 2110 p += strlen(p); 2111 *p++ = ':'; 2112 } 2113 else 2114 s->s_hostsig = p; 2115 for (i = 0; i < nmx; i++) 2116 { 2117 if (i != 0) 2118 *p++ = ':'; 2119 strcpy(p, mxhosts[i]); 2120 p += strlen(p); 2121 } 2122 if (endp != NULL) 2123 *endp++ = ':'; 2124 } 2125 makelower(s->s_hostsig); 2126 if (ConfigLevel < 2) 2127 _res.options = oldoptions; 2128 #else 2129 /* not using BIND -- the signature is just the host name */ 2130 s->s_hostsig = host; 2131 #endif 2132 if (tTd(17, 1)) 2133 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2134 return s->s_hostsig; 2135 } 2136