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