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