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 8.107 (Berkeley) 11/13/94"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <netdb.h> 15 #include <errno.h> 16 #if NAMED_BIND 17 #include <resolv.h> 18 19 extern int h_errno; 20 #endif 21 22 extern char SmtpError[]; 23 24 /* 25 ** SENDALL -- actually send all the messages. 26 ** 27 ** Parameters: 28 ** e -- the envelope to send. 29 ** mode -- the delivery mode to use. If SM_DEFAULT, use 30 ** the current e->e_sendmode. 31 ** 32 ** Returns: 33 ** none. 34 ** 35 ** Side Effects: 36 ** Scans the send lists and sends everything it finds. 37 ** Delivers any appropriate error messages. 38 ** If we are running in a non-interactive mode, takes the 39 ** appropriate action. 40 */ 41 42 sendall(e, mode) 43 ENVELOPE *e; 44 char mode; 45 { 46 register ADDRESS *q; 47 char *owner; 48 int otherowners; 49 register ENVELOPE *ee; 50 ENVELOPE *splitenv = NULL; 51 bool announcequeueup; 52 bool oldverbose = Verbose; 53 int pid; 54 55 /* 56 ** If we have had global, fatal errors, don't bother sending 57 ** the message at all if we are in SMTP mode. Local errors 58 ** (e.g., a single address failing) will still cause the other 59 ** addresses to be sent. 60 */ 61 62 if (bitset(EF_FATALERRS, e->e_flags) && 63 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 64 { 65 e->e_flags |= EF_CLRQUEUE; 66 return; 67 } 68 69 /* determine actual delivery mode */ 70 CurrentLA = getla(); 71 if (mode == SM_DEFAULT) 72 { 73 mode = e->e_sendmode; 74 if (mode != SM_VERIFY && 75 shouldqueue(e->e_msgpriority, e->e_ctime)) 76 mode = SM_QUEUE; 77 announcequeueup = mode == SM_QUEUE; 78 } 79 else 80 announcequeueup = FALSE; 81 82 if (tTd(13, 1)) 83 { 84 printf("\n===== SENDALL: mode %c, id %s, e_from ", 85 mode, e->e_id); 86 printaddr(&e->e_from, FALSE); 87 printf("sendqueue:\n"); 88 printaddr(e->e_sendqueue, TRUE); 89 } 90 91 /* 92 ** Do any preprocessing necessary for the mode we are running. 93 ** Check to make sure the hop count is reasonable. 94 ** Delete sends to the sender in mailing lists. 95 */ 96 97 CurEnv = e; 98 99 if (e->e_hopcount > MaxHopCount) 100 { 101 errno = 0; 102 e->e_flags |= EF_FATALERRS|EF_PM_NOTIFY|EF_CLRQUEUE; 103 syserr("554 too many hops %d (%d max): from %s via %s, to %s", 104 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 105 RealHostName == NULL ? "localhost" : RealHostName, 106 e->e_sendqueue->q_paddr); 107 return; 108 } 109 110 /* 111 ** Do sender deletion. 112 ** 113 ** If the sender has the QQUEUEUP flag set, skip this. 114 ** This can happen if the name server is hosed when you 115 ** are trying to send mail. The result is that the sender 116 ** is instantiated in the queue as a recipient. 117 */ 118 119 if (!bitset(EF_METOO, e->e_flags) && 120 !bitset(QQUEUEUP, e->e_from.q_flags)) 121 { 122 if (tTd(13, 5)) 123 { 124 printf("sendall: QDONTSEND "); 125 printaddr(&e->e_from, FALSE); 126 } 127 e->e_from.q_flags |= QDONTSEND; 128 (void) recipient(&e->e_from, &e->e_sendqueue, e); 129 } 130 131 /* 132 ** Handle alias owners. 133 ** 134 ** We scan up the q_alias chain looking for owners. 135 ** We discard owners that are the same as the return path. 136 */ 137 138 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 139 { 140 register struct address *a; 141 142 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 143 continue; 144 if (a != NULL) 145 q->q_owner = a->q_owner; 146 147 if (q->q_owner != NULL && 148 !bitset(QDONTSEND, q->q_flags) && 149 strcmp(q->q_owner, e->e_from.q_paddr) == 0) 150 q->q_owner = NULL; 151 } 152 153 owner = ""; 154 otherowners = 1; 155 while (owner != NULL && otherowners > 0) 156 { 157 owner = NULL; 158 otherowners = 0; 159 160 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 161 { 162 if (bitset(QDONTSEND, q->q_flags)) 163 continue; 164 165 if (q->q_owner != NULL) 166 { 167 if (owner == NULL) 168 owner = q->q_owner; 169 else if (owner != q->q_owner) 170 { 171 if (strcmp(owner, q->q_owner) == 0) 172 { 173 /* make future comparisons cheap */ 174 q->q_owner = owner; 175 } 176 else 177 { 178 otherowners++; 179 } 180 owner = q->q_owner; 181 } 182 } 183 else 184 { 185 otherowners++; 186 } 187 } 188 189 if (owner != NULL && otherowners > 0) 190 { 191 extern HDR *copyheader(); 192 extern ADDRESS *copyqueue(); 193 194 /* 195 ** Split this envelope into two. 196 */ 197 198 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 199 *ee = *e; 200 ee->e_id = NULL; 201 (void) queuename(ee, '\0'); 202 203 if (tTd(13, 1)) 204 printf("sendall: split %s into %s\n", 205 e->e_id, ee->e_id); 206 207 ee->e_header = copyheader(e->e_header); 208 ee->e_sendqueue = copyqueue(e->e_sendqueue); 209 ee->e_errorqueue = copyqueue(e->e_errorqueue); 210 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS|EF_SENDRECEIPT); 211 ee->e_flags |= EF_NORECEIPT; 212 setsender(owner, ee, NULL, TRUE); 213 if (tTd(13, 5)) 214 { 215 printf("sendall(split): QDONTSEND "); 216 printaddr(&ee->e_from, FALSE); 217 } 218 ee->e_from.q_flags |= QDONTSEND; 219 ee->e_dfp = NULL; 220 ee->e_xfp = NULL; 221 ee->e_df = NULL; 222 ee->e_errormode = EM_MAIL; 223 ee->e_sibling = splitenv; 224 splitenv = ee; 225 226 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 227 if (q->q_owner == owner) 228 { 229 q->q_flags |= QDONTSEND; 230 q->q_flags &= ~QQUEUEUP; 231 } 232 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 233 if (q->q_owner != owner) 234 { 235 q->q_flags |= QDONTSEND; 236 q->q_flags &= ~QQUEUEUP; 237 } 238 239 if (e->e_df != NULL && mode != SM_VERIFY) 240 { 241 ee->e_dfp = NULL; 242 ee->e_df = queuename(ee, 'd'); 243 ee->e_df = newstr(ee->e_df); 244 if (link(e->e_df, ee->e_df) < 0) 245 { 246 syserr("sendall: link(%s, %s)", 247 e->e_df, ee->e_df); 248 } 249 } 250 #ifdef LOG 251 if (LogLevel > 4) 252 syslog(LOG_INFO, "%s: clone %s, owner=%s", 253 ee->e_id, e->e_id, owner); 254 #endif 255 } 256 } 257 258 if (owner != NULL) 259 { 260 setsender(owner, e, NULL, TRUE); 261 if (tTd(13, 5)) 262 { 263 printf("sendall(owner): QDONTSEND "); 264 printaddr(&e->e_from, FALSE); 265 } 266 e->e_from.q_flags |= QDONTSEND; 267 e->e_errormode = EM_MAIL; 268 e->e_flags |= EF_NORECEIPT; 269 } 270 271 # ifdef QUEUE 272 if ((mode == SM_QUEUE || mode == SM_FORK || 273 (mode != SM_VERIFY && SuperSafe)) && 274 !bitset(EF_INQUEUE, e->e_flags)) 275 { 276 /* be sure everything is instantiated in the queue */ 277 queueup(e, TRUE, announcequeueup); 278 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 279 queueup(ee, TRUE, announcequeueup); 280 } 281 #endif /* QUEUE */ 282 283 /* 284 ** If we belong in background, fork now. 285 */ 286 287 switch (mode) 288 { 289 case SM_VERIFY: 290 Verbose = TRUE; 291 break; 292 293 case SM_QUEUE: 294 queueonly: 295 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 296 return; 297 298 case SM_FORK: 299 if (e->e_xfp != NULL) 300 (void) fflush(e->e_xfp); 301 302 # if !HASFLOCK 303 /* 304 ** Since fcntl locking has the interesting semantic that 305 ** the lock is owned by a process, not by an open file 306 ** descriptor, we have to flush this to the queue, and 307 ** then restart from scratch in the child. 308 */ 309 310 /* save id for future use */ 311 id = e->e_id; 312 313 /* now drop the envelope in the parent */ 314 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 315 dropenvelope(e); 316 317 /* and reacquire in the child */ 318 (void) dowork(id, TRUE, FALSE, e); 319 320 return; 321 322 # else /* HASFLOCK */ 323 324 pid = fork(); 325 if (pid < 0) 326 { 327 goto queueonly; 328 } 329 else if (pid > 0) 330 { 331 /* be sure we leave the temp files to our child */ 332 /* can't call unlockqueue to avoid unlink of xfp */ 333 if (e->e_lockfp != NULL) 334 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 335 e->e_lockfp = NULL; 336 337 /* close any random open files in the envelope */ 338 closexscript(e); 339 if (e->e_dfp != NULL) 340 (void) xfclose(e->e_dfp, "sendenvelope", e->e_df); 341 e->e_dfp = NULL; 342 e->e_id = e->e_df = NULL; 343 344 /* catch intermediate zombie */ 345 (void) waitfor(pid); 346 return; 347 } 348 349 /* double fork to avoid zombies */ 350 pid = fork(); 351 if (pid > 0) 352 exit(EX_OK); 353 354 /* be sure we are immune from the terminal */ 355 disconnect(1, e); 356 357 /* prevent parent from waiting if there was an error */ 358 if (pid < 0) 359 { 360 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 361 finis(); 362 } 363 364 /* 365 ** Close any cached connections. 366 ** 367 ** We don't send the QUIT protocol because the parent 368 ** still knows about the connection. 369 ** 370 ** This should only happen when delivering an error 371 ** message. 372 */ 373 374 mci_flush(FALSE, NULL); 375 376 # endif /* HASFLOCK */ 377 378 break; 379 } 380 381 if (splitenv != NULL) 382 { 383 if (tTd(13, 1)) 384 { 385 printf("\nsendall: Split queue; remaining queue:\n"); 386 printaddr(e->e_sendqueue, TRUE); 387 } 388 389 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 390 { 391 CurEnv = ee; 392 if (mode != SM_VERIFY) 393 openxscript(ee); 394 sendenvelope(ee, mode); 395 dropenvelope(ee); 396 } 397 398 CurEnv = e; 399 } 400 sendenvelope(e, mode); 401 Verbose = oldverbose; 402 } 403 404 sendenvelope(e, mode) 405 register ENVELOPE *e; 406 char mode; 407 { 408 register ADDRESS *q; 409 char *qf; 410 char *id; 411 bool didany; 412 413 /* 414 ** If we have had global, fatal errors, don't bother sending 415 ** the message at all if we are in SMTP mode. Local errors 416 ** (e.g., a single address failing) will still cause the other 417 ** addresses to be sent. 418 */ 419 420 if (bitset(EF_FATALERRS, e->e_flags) && 421 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 422 { 423 e->e_flags |= EF_CLRQUEUE; 424 return; 425 } 426 427 /* 428 ** Run through the list and send everything. 429 ** 430 ** Set EF_GLOBALERRS so that error messages during delivery 431 ** result in returned mail. 432 */ 433 434 e->e_nsent = 0; 435 e->e_flags |= EF_GLOBALERRS; 436 didany = FALSE; 437 438 /* now run through the queue */ 439 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 440 { 441 #ifdef XDEBUG 442 char wbuf[MAXNAME + 20]; 443 444 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 445 checkfd012(wbuf); 446 #endif 447 if (mode == SM_VERIFY) 448 { 449 e->e_to = q->q_paddr; 450 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 451 { 452 if (q->q_host != NULL && q->q_host[0] != '\0') 453 message("deliverable: mailer %s, host %s, user %s", 454 q->q_mailer->m_name, 455 q->q_host, 456 q->q_user); 457 else 458 message("deliverable: mailer %s, user %s", 459 q->q_mailer->m_name, 460 q->q_user); 461 } 462 } 463 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 464 { 465 # ifdef QUEUE 466 /* 467 ** Checkpoint the send list every few addresses 468 */ 469 470 if (e->e_nsent >= CheckpointInterval) 471 { 472 queueup(e, TRUE, FALSE); 473 e->e_nsent = 0; 474 } 475 # endif /* QUEUE */ 476 (void) deliver(e, q); 477 didany = TRUE; 478 } 479 } 480 if (didany) 481 { 482 e->e_dtime = curtime(); 483 e->e_ntries++; 484 } 485 486 #ifdef XDEBUG 487 checkfd012("end of sendenvelope"); 488 #endif 489 490 if (mode == SM_FORK) 491 finis(); 492 } 493 /* 494 ** DOFORK -- do a fork, retrying a couple of times on failure. 495 ** 496 ** This MUST be a macro, since after a vfork we are running 497 ** two processes on the same stack!!! 498 ** 499 ** Parameters: 500 ** none. 501 ** 502 ** Returns: 503 ** From a macro??? You've got to be kidding! 504 ** 505 ** Side Effects: 506 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 507 ** pid of child in parent, zero in child. 508 ** -1 on unrecoverable error. 509 ** 510 ** Notes: 511 ** I'm awfully sorry this looks so awful. That's 512 ** vfork for you..... 513 */ 514 515 # define NFORKTRIES 5 516 517 # ifndef FORK 518 # define FORK fork 519 # endif 520 521 # define DOFORK(fORKfN) \ 522 {\ 523 register int i;\ 524 \ 525 for (i = NFORKTRIES; --i >= 0; )\ 526 {\ 527 pid = fORKfN();\ 528 if (pid >= 0)\ 529 break;\ 530 if (i > 0)\ 531 sleep((unsigned) NFORKTRIES - i);\ 532 }\ 533 } 534 /* 535 ** DOFORK -- simple fork interface to DOFORK. 536 ** 537 ** Parameters: 538 ** none. 539 ** 540 ** Returns: 541 ** pid of child in parent. 542 ** zero in child. 543 ** -1 on error. 544 ** 545 ** Side Effects: 546 ** returns twice, once in parent and once in child. 547 */ 548 549 dofork() 550 { 551 register int pid; 552 553 DOFORK(fork); 554 return (pid); 555 } 556 /* 557 ** DELIVER -- Deliver a message to a list of addresses. 558 ** 559 ** This routine delivers to everyone on the same host as the 560 ** user on the head of the list. It is clever about mailers 561 ** that don't handle multiple users. It is NOT guaranteed 562 ** that it will deliver to all these addresses however -- so 563 ** deliver should be called once for each address on the 564 ** list. 565 ** 566 ** Parameters: 567 ** e -- the envelope to deliver. 568 ** firstto -- head of the address list to deliver to. 569 ** 570 ** Returns: 571 ** zero -- successfully delivered. 572 ** else -- some failure, see ExitStat for more info. 573 ** 574 ** Side Effects: 575 ** The standard input is passed off to someone. 576 */ 577 578 deliver(e, firstto) 579 register ENVELOPE *e; 580 ADDRESS *firstto; 581 { 582 char *host; /* host being sent to */ 583 char *user; /* user being sent to */ 584 char **pvp; 585 register char **mvp; 586 register char *p; 587 register MAILER *m; /* mailer for this recipient */ 588 ADDRESS *ctladdr; 589 register MCI *mci; 590 register ADDRESS *to = firstto; 591 bool clever = FALSE; /* running user smtp to this mailer */ 592 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 593 int rcode; /* response code */ 594 char *firstsig; /* signature of firstto */ 595 int pid; 596 char *curhost; 597 int mpvect[2]; 598 int rpvect[2]; 599 char *pv[MAXPV+1]; 600 char tobuf[TOBUFSIZE]; /* text line of to people */ 601 char buf[MAXNAME]; 602 char rpathbuf[MAXNAME]; /* translated return path */ 603 extern int checkcompat(); 604 605 errno = 0; 606 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 607 return (0); 608 609 #if NAMED_BIND 610 /* unless interactive, try twice, over a minute */ 611 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) 612 { 613 _res.retrans = 30; 614 _res.retry = 2; 615 } 616 #endif 617 618 m = to->q_mailer; 619 host = to->q_host; 620 CurEnv = e; /* just in case */ 621 e->e_statmsg = NULL; 622 SmtpError[0] = '\0'; 623 624 if (tTd(10, 1)) 625 printf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n", 626 e->e_id, m->m_name, host, to->q_user); 627 if (tTd(10, 100)) 628 printopenfds(FALSE); 629 630 /* 631 ** If this mailer is expensive, and if we don't want to make 632 ** connections now, just mark these addresses and return. 633 ** This is useful if we want to batch connections to 634 ** reduce load. This will cause the messages to be 635 ** queued up, and a daemon will come along to send the 636 ** messages later. 637 ** This should be on a per-mailer basis. 638 */ 639 640 if (NoConnect && bitnset(M_EXPENSIVE, m->m_flags) && !Verbose) 641 { 642 for (; to != NULL; to = to->q_next) 643 { 644 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 645 to->q_mailer != m) 646 continue; 647 to->q_flags |= QQUEUEUP; 648 e->e_to = to->q_paddr; 649 message("queued"); 650 if (LogLevel > 8) 651 logdelivery(m, NULL, "queued", NULL, e); 652 } 653 e->e_to = NULL; 654 return (0); 655 } 656 657 /* 658 ** Do initial argv setup. 659 ** Insert the mailer name. Notice that $x expansion is 660 ** NOT done on the mailer name. Then, if the mailer has 661 ** a picky -f flag, we insert it as appropriate. This 662 ** code does not check for 'pv' overflow; this places a 663 ** manifest lower limit of 4 for MAXPV. 664 ** The from address rewrite is expected to make 665 ** the address relative to the other end. 666 */ 667 668 /* rewrite from address, using rewriting rules */ 669 rcode = EX_OK; 670 if (bitnset(M_UDBENVELOPE, e->e_from.q_mailer->m_flags)) 671 p = e->e_sender; 672 else 673 p = e->e_from.q_paddr; 674 (void) strcpy(rpathbuf, remotename(p, m, 675 RF_SENDERADDR|RF_CANONICAL, 676 &rcode, e)); 677 define('g', rpathbuf, e); /* translated return path */ 678 define('h', host, e); /* to host */ 679 Errors = 0; 680 pvp = pv; 681 *pvp++ = m->m_argv[0]; 682 683 /* insert -f or -r flag as appropriate */ 684 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 685 { 686 if (bitnset(M_FOPT, m->m_flags)) 687 *pvp++ = "-f"; 688 else 689 *pvp++ = "-r"; 690 *pvp++ = newstr(rpathbuf); 691 } 692 693 /* 694 ** Append the other fixed parts of the argv. These run 695 ** up to the first entry containing "$u". There can only 696 ** be one of these, and there are only a few more slots 697 ** in the pv after it. 698 */ 699 700 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 701 { 702 /* can't use strchr here because of sign extension problems */ 703 while (*p != '\0') 704 { 705 if ((*p++ & 0377) == MACROEXPAND) 706 { 707 if (*p == 'u') 708 break; 709 } 710 } 711 712 if (*p != '\0') 713 break; 714 715 /* this entry is safe -- go ahead and process it */ 716 expand(*mvp, buf, &buf[sizeof buf - 1], e); 717 *pvp++ = newstr(buf); 718 if (pvp >= &pv[MAXPV - 3]) 719 { 720 syserr("554 Too many parameters to %s before $u", pv[0]); 721 return (-1); 722 } 723 } 724 725 /* 726 ** If we have no substitution for the user name in the argument 727 ** list, we know that we must supply the names otherwise -- and 728 ** SMTP is the answer!! 729 */ 730 731 if (*mvp == NULL) 732 { 733 /* running SMTP */ 734 # ifdef SMTP 735 clever = TRUE; 736 *pvp = NULL; 737 # else /* SMTP */ 738 /* oops! we don't implement SMTP */ 739 syserr("554 SMTP style mailer not implemented"); 740 return (EX_SOFTWARE); 741 # endif /* SMTP */ 742 } 743 744 /* 745 ** At this point *mvp points to the argument with $u. We 746 ** run through our address list and append all the addresses 747 ** we can. If we run out of space, do not fret! We can 748 ** always send another copy later. 749 */ 750 751 tobuf[0] = '\0'; 752 e->e_to = tobuf; 753 ctladdr = NULL; 754 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 755 for (; to != NULL; to = to->q_next) 756 { 757 /* avoid sending multiple recipients to dumb mailers */ 758 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 759 break; 760 761 /* if already sent or not for this host, don't send */ 762 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 763 to->q_mailer != firstto->q_mailer || 764 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 765 continue; 766 767 /* avoid overflowing tobuf */ 768 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 769 break; 770 771 if (tTd(10, 1)) 772 { 773 printf("\nsend to "); 774 printaddr(to, FALSE); 775 } 776 777 /* compute effective uid/gid when sending */ 778 if (bitnset(M_RUNASRCPT, to->q_mailer->m_flags)) 779 ctladdr = getctladdr(to); 780 781 user = to->q_user; 782 e->e_to = to->q_paddr; 783 if (tTd(10, 5)) 784 { 785 printf("deliver: QDONTSEND "); 786 printaddr(to, FALSE); 787 } 788 to->q_flags |= QDONTSEND; 789 790 /* 791 ** Check to see that these people are allowed to 792 ** talk to each other. 793 */ 794 795 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 796 { 797 e->e_flags |= EF_NORETURN; 798 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 799 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, e); 800 continue; 801 } 802 #if NAMED_BIND 803 h_errno = 0; 804 #endif 805 rcode = checkcompat(to, e); 806 if (rcode != EX_OK) 807 { 808 markfailure(e, to, rcode); 809 giveresponse(rcode, m, NULL, ctladdr, e); 810 continue; 811 } 812 813 /* 814 ** Strip quote bits from names if the mailer is dumb 815 ** about them. 816 */ 817 818 if (bitnset(M_STRIPQ, m->m_flags)) 819 { 820 stripquotes(user); 821 stripquotes(host); 822 } 823 824 /* hack attack -- delivermail compatibility */ 825 if (m == ProgMailer && *user == '|') 826 user++; 827 828 /* 829 ** If an error message has already been given, don't 830 ** bother to send to this address. 831 ** 832 ** >>>>>>>>>> This clause assumes that the local mailer 833 ** >> NOTE >> cannot do any further aliasing; that 834 ** >>>>>>>>>> function is subsumed by sendmail. 835 */ 836 837 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 838 continue; 839 840 /* save statistics.... */ 841 markstats(e, to); 842 843 /* 844 ** See if this user name is "special". 845 ** If the user name has a slash in it, assume that this 846 ** is a file -- send it off without further ado. Note 847 ** that this type of addresses is not processed along 848 ** with the others, so we fudge on the To person. 849 */ 850 851 if (m == FileMailer) 852 { 853 rcode = mailfile(user, ctladdr, e); 854 giveresponse(rcode, m, NULL, ctladdr, e); 855 if (rcode == EX_OK) 856 to->q_flags |= QSENT; 857 to->q_statdate = curtime(); 858 continue; 859 } 860 861 /* 862 ** Address is verified -- add this user to mailer 863 ** argv, and add it to the print list of recipients. 864 */ 865 866 /* link together the chain of recipients */ 867 to->q_tchain = tochain; 868 tochain = to; 869 870 /* create list of users for error messages */ 871 (void) strcat(tobuf, ","); 872 (void) strcat(tobuf, to->q_paddr); 873 define('u', user, e); /* to user */ 874 p = to->q_home; 875 if (p == NULL && ctladdr != NULL) 876 p = ctladdr->q_home; 877 define('z', p, e); /* user's home */ 878 879 /* 880 ** Expand out this user into argument list. 881 */ 882 883 if (!clever) 884 { 885 expand(*mvp, buf, &buf[sizeof buf - 1], e); 886 *pvp++ = newstr(buf); 887 if (pvp >= &pv[MAXPV - 2]) 888 { 889 /* allow some space for trailing parms */ 890 break; 891 } 892 } 893 } 894 895 /* see if any addresses still exist */ 896 if (tobuf[0] == '\0') 897 { 898 define('g', (char *) NULL, e); 899 return (0); 900 } 901 902 /* print out messages as full list */ 903 e->e_to = tobuf + 1; 904 905 /* 906 ** Fill out any parameters after the $u parameter. 907 */ 908 909 while (!clever && *++mvp != NULL) 910 { 911 expand(*mvp, buf, &buf[sizeof buf - 1], e); 912 *pvp++ = newstr(buf); 913 if (pvp >= &pv[MAXPV]) 914 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 915 } 916 *pvp++ = NULL; 917 918 /* 919 ** Call the mailer. 920 ** The argument vector gets built, pipes 921 ** are created as necessary, and we fork & exec as 922 ** appropriate. 923 ** If we are running SMTP, we just need to clean up. 924 */ 925 926 /*XXX this seems a bit wierd */ 927 if (ctladdr == NULL && m != ProgMailer && 928 bitset(QGOODUID, e->e_from.q_flags)) 929 ctladdr = &e->e_from; 930 931 #if NAMED_BIND 932 if (ConfigLevel < 2) 933 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 934 #endif 935 936 if (tTd(11, 1)) 937 { 938 printf("openmailer:"); 939 printav(pv); 940 } 941 errno = 0; 942 #if NAMED_BIND 943 h_errno = 0; 944 #endif 945 946 CurHostName = m->m_mailer; 947 948 /* 949 ** Deal with the special case of mail handled through an IPC 950 ** connection. 951 ** In this case we don't actually fork. We must be 952 ** running SMTP for this to work. We will return a 953 ** zero pid to indicate that we are running IPC. 954 ** We also handle a debug version that just talks to stdin/out. 955 */ 956 957 curhost = NULL; 958 SmtpPhase = NULL; 959 mci = NULL; 960 961 #ifdef XDEBUG 962 { 963 char wbuf[MAXLINE]; 964 965 /* make absolutely certain 0, 1, and 2 are in use */ 966 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 967 checkfd012(wbuf); 968 } 969 #endif 970 971 /* check for 8-bit available */ 972 if (bitset(EF_HAS8BIT, e->e_flags) && 973 bitnset(M_7BITS, m->m_flags) && 974 !bitset(MM_MIME8BIT, MimeMode)) 975 { 976 usrerr("554 Cannot send 8-bit data to 7-bit destination"); 977 rcode = EX_DATAERR; 978 goto give_up; 979 } 980 981 /* check for Local Person Communication -- not for mortals!!! */ 982 if (strcmp(m->m_mailer, "[LPC]") == 0) 983 { 984 mci = (MCI *) xalloc(sizeof *mci); 985 bzero((char *) mci, sizeof *mci); 986 mci->mci_in = stdin; 987 mci->mci_out = stdout; 988 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 989 mci->mci_mailer = m; 990 } 991 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 992 strcmp(m->m_mailer, "[TCP]") == 0) 993 { 994 #ifdef DAEMON 995 register int i; 996 register u_short port; 997 998 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 999 { 1000 syserr("null host name for %s mailer", m->m_mailer); 1001 rcode = EX_CONFIG; 1002 goto give_up; 1003 } 1004 1005 CurHostName = pv[1]; 1006 curhost = hostsignature(m, pv[1], e); 1007 1008 if (curhost == NULL || curhost[0] == '\0') 1009 { 1010 syserr("null host signature for %s", pv[1]); 1011 rcode = EX_CONFIG; 1012 goto give_up; 1013 } 1014 1015 if (!clever) 1016 { 1017 syserr("554 non-clever IPC"); 1018 rcode = EX_CONFIG; 1019 goto give_up; 1020 } 1021 if (pv[2] != NULL) 1022 port = atoi(pv[2]); 1023 else 1024 port = 0; 1025 tryhost: 1026 while (*curhost != '\0') 1027 { 1028 register char *p; 1029 static char hostbuf[MAXNAME]; 1030 1031 /* pull the next host from the signature */ 1032 p = strchr(curhost, ':'); 1033 if (p == NULL) 1034 p = &curhost[strlen(curhost)]; 1035 if (p == curhost) 1036 { 1037 syserr("deliver: null host name in signature"); 1038 curhost++; 1039 continue; 1040 } 1041 strncpy(hostbuf, curhost, p - curhost); 1042 hostbuf[p - curhost] = '\0'; 1043 if (*p != '\0') 1044 p++; 1045 curhost = p; 1046 1047 /* see if we already know that this host is fried */ 1048 CurHostName = hostbuf; 1049 mci = mci_get(hostbuf, m); 1050 if (mci->mci_state != MCIS_CLOSED) 1051 { 1052 if (tTd(11, 1)) 1053 { 1054 printf("openmailer: "); 1055 mci_dump(mci, FALSE); 1056 } 1057 CurHostName = mci->mci_host; 1058 message("Using cached connection to %s via %s...", 1059 hostbuf, m->m_name); 1060 break; 1061 } 1062 mci->mci_mailer = m; 1063 if (mci->mci_exitstat != EX_OK) 1064 continue; 1065 1066 /* try the connection */ 1067 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1068 message("Connecting to %s via %s...", 1069 hostbuf, m->m_name); 1070 i = makeconnection(hostbuf, port, mci, 1071 bitnset(M_SECURE_PORT, m->m_flags)); 1072 mci->mci_exitstat = i; 1073 mci->mci_errno = errno; 1074 #if NAMED_BIND 1075 mci->mci_herrno = h_errno; 1076 #endif 1077 if (i == EX_OK) 1078 { 1079 mci->mci_state = MCIS_OPENING; 1080 mci_cache(mci); 1081 if (TrafficLogFile != NULL) 1082 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1083 getpid(), hostbuf); 1084 break; 1085 } 1086 else if (tTd(11, 1)) 1087 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1088 i, errno); 1089 1090 /* enter status of this host */ 1091 setstat(i); 1092 1093 /* should print some message here for -v mode */ 1094 } 1095 if (mci == NULL) 1096 { 1097 syserr("deliver: no host name"); 1098 rcode = EX_OSERR; 1099 goto give_up; 1100 } 1101 mci->mci_pid = 0; 1102 #else /* no DAEMON */ 1103 syserr("554 openmailer: no IPC"); 1104 if (tTd(11, 1)) 1105 printf("openmailer: NULL\n"); 1106 rcode = EX_UNAVAILABLE; 1107 goto give_up; 1108 #endif /* DAEMON */ 1109 } 1110 else 1111 { 1112 /* flush any expired connections */ 1113 (void) mci_scan(NULL); 1114 1115 /* announce the connection to verbose listeners */ 1116 if (host == NULL || host[0] == '\0') 1117 message("Connecting to %s...", m->m_name); 1118 else 1119 message("Connecting to %s via %s...", host, m->m_name); 1120 if (TrafficLogFile != NULL) 1121 { 1122 char **av; 1123 1124 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1125 for (av = pv; *av != NULL; av++) 1126 fprintf(TrafficLogFile, " %s", *av); 1127 fprintf(TrafficLogFile, "\n"); 1128 } 1129 1130 /* create a pipe to shove the mail through */ 1131 if (pipe(mpvect) < 0) 1132 { 1133 syserr("%s... openmailer(%s): pipe (to mailer)", 1134 e->e_to, m->m_name); 1135 if (tTd(11, 1)) 1136 printf("openmailer: NULL\n"); 1137 rcode = EX_OSERR; 1138 goto give_up; 1139 } 1140 1141 /* if this mailer speaks smtp, create a return pipe */ 1142 if (clever && pipe(rpvect) < 0) 1143 { 1144 syserr("%s... openmailer(%s): pipe (from mailer)", 1145 e->e_to, m->m_name); 1146 (void) close(mpvect[0]); 1147 (void) close(mpvect[1]); 1148 if (tTd(11, 1)) 1149 printf("openmailer: NULL\n"); 1150 rcode = EX_OSERR; 1151 goto give_up; 1152 } 1153 1154 /* 1155 ** Actually fork the mailer process. 1156 ** DOFORK is clever about retrying. 1157 ** 1158 ** Dispose of SIGCHLD signal catchers that may be laying 1159 ** around so that endmail will get it. 1160 */ 1161 1162 if (e->e_xfp != NULL) 1163 (void) fflush(e->e_xfp); /* for debugging */ 1164 (void) fflush(stdout); 1165 # ifdef SIGCHLD 1166 (void) setsignal(SIGCHLD, SIG_DFL); 1167 # endif /* SIGCHLD */ 1168 DOFORK(FORK); 1169 /* pid is set by DOFORK */ 1170 if (pid < 0) 1171 { 1172 /* failure */ 1173 syserr("%s... openmailer(%s): cannot fork", 1174 e->e_to, m->m_name); 1175 (void) close(mpvect[0]); 1176 (void) close(mpvect[1]); 1177 if (clever) 1178 { 1179 (void) close(rpvect[0]); 1180 (void) close(rpvect[1]); 1181 } 1182 if (tTd(11, 1)) 1183 printf("openmailer: NULL\n"); 1184 rcode = EX_OSERR; 1185 goto give_up; 1186 } 1187 else if (pid == 0) 1188 { 1189 int i; 1190 int saveerrno; 1191 char **ep; 1192 char *env[MAXUSERENVIRON]; 1193 extern char **environ; 1194 extern int DtableSize; 1195 1196 /* child -- set up input & exec mailer */ 1197 (void) setsignal(SIGINT, SIG_IGN); 1198 (void) setsignal(SIGHUP, SIG_IGN); 1199 (void) setsignal(SIGTERM, SIG_DFL); 1200 1201 /* reset user and group */ 1202 if (bitnset(M_SPECIFIC_UID, m->m_flags)) 1203 { 1204 (void) setgid(m->m_gid); 1205 (void) setuid(m->m_uid); 1206 } 1207 else if (ctladdr != NULL && ctladdr->q_uid != 0) 1208 { 1209 (void) initgroups(ctladdr->q_ruser? 1210 ctladdr->q_ruser: ctladdr->q_user, 1211 ctladdr->q_gid); 1212 (void) setgid(ctladdr->q_gid); 1213 (void) setuid(ctladdr->q_uid); 1214 } 1215 else 1216 { 1217 (void) initgroups(DefUser, DefGid); 1218 if (m->m_gid == 0) 1219 (void) setgid(DefGid); 1220 else 1221 (void) setgid(m->m_gid); 1222 if (m->m_uid == 0) 1223 (void) setuid(DefUid); 1224 else 1225 (void) setuid(m->m_uid); 1226 } 1227 1228 if (tTd(11, 2)) 1229 printf("openmailer: running as r/euid=%d/%d\n", 1230 getuid(), geteuid()); 1231 1232 /* move into some "safe" directory */ 1233 if (m->m_execdir != NULL) 1234 { 1235 char *p, *q; 1236 char buf[MAXLINE]; 1237 1238 for (p = m->m_execdir; p != NULL; p = q) 1239 { 1240 q = strchr(p, ':'); 1241 if (q != NULL) 1242 *q = '\0'; 1243 expand(p, buf, &buf[sizeof buf] - 1, e); 1244 if (q != NULL) 1245 *q++ = ':'; 1246 if (tTd(11, 20)) 1247 printf("openmailer: trydir %s\n", 1248 buf); 1249 if (buf[0] != '\0' && chdir(buf) >= 0) 1250 break; 1251 } 1252 } 1253 1254 /* arrange to filter std & diag output of command */ 1255 if (clever) 1256 { 1257 (void) close(rpvect[0]); 1258 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1259 { 1260 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1261 e->e_to, m->m_name, rpvect[1]); 1262 _exit(EX_OSERR); 1263 } 1264 (void) close(rpvect[1]); 1265 } 1266 else if (OpMode == MD_SMTP || OpMode == MD_DAEMON || 1267 HoldErrs || DisConnected) 1268 { 1269 /* put mailer output in transcript */ 1270 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1271 { 1272 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1273 e->e_to, m->m_name, 1274 fileno(e->e_xfp)); 1275 _exit(EX_OSERR); 1276 } 1277 } 1278 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1279 { 1280 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1281 e->e_to, m->m_name); 1282 _exit(EX_OSERR); 1283 } 1284 1285 /* arrange to get standard input */ 1286 (void) close(mpvect[1]); 1287 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1288 { 1289 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1290 e->e_to, m->m_name, mpvect[0]); 1291 _exit(EX_OSERR); 1292 } 1293 (void) close(mpvect[0]); 1294 1295 /* arrange for all the files to be closed */ 1296 for (i = 3; i < DtableSize; i++) 1297 { 1298 register int j; 1299 1300 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1301 (void) fcntl(i, F_SETFD, j | 1); 1302 } 1303 1304 /* 1305 ** Set up the mailer environment 1306 ** _FORCE_MAIL_LOCAL_ is DG-UX equiv of -d flag. 1307 ** TZ is timezone information. 1308 ** SYSTYPE is Apollo software sys type (required). 1309 ** ISP is Apollo hardware system type (required). 1310 */ 1311 1312 i = 0; 1313 env[i++] = "AGENT=sendmail"; 1314 env[i++] = "_FORCE_MAIL_LOCAL_=yes"; 1315 for (ep = environ; *ep != NULL; ep++) 1316 { 1317 if (strncmp(*ep, "TZ=", 3) == 0 || 1318 strncmp(*ep, "ISP=", 4) == 0 || 1319 strncmp(*ep, "SYSTYPE=", 8) == 0) 1320 env[i++] = *ep; 1321 } 1322 env[i] = NULL; 1323 1324 /* run disconnected from terminal */ 1325 (void) setsid(); 1326 1327 /* try to execute the mailer */ 1328 execve(m->m_mailer, pv, env); 1329 saveerrno = errno; 1330 syserr("Cannot exec %s", m->m_mailer); 1331 if (bitnset(M_LOCALMAILER, m->m_flags) || 1332 transienterror(saveerrno)) 1333 _exit(EX_OSERR); 1334 _exit(EX_UNAVAILABLE); 1335 } 1336 1337 /* 1338 ** Set up return value. 1339 */ 1340 1341 mci = (MCI *) xalloc(sizeof *mci); 1342 bzero((char *) mci, sizeof *mci); 1343 mci->mci_mailer = m; 1344 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1345 mci->mci_pid = pid; 1346 (void) close(mpvect[0]); 1347 mci->mci_out = fdopen(mpvect[1], "w"); 1348 if (mci->mci_out == NULL) 1349 { 1350 syserr("deliver: cannot create mailer output channel, fd=%d", 1351 mpvect[1]); 1352 (void) close(mpvect[1]); 1353 if (clever) 1354 { 1355 (void) close(rpvect[0]); 1356 (void) close(rpvect[1]); 1357 } 1358 rcode = EX_OSERR; 1359 goto give_up; 1360 } 1361 if (clever) 1362 { 1363 (void) close(rpvect[1]); 1364 mci->mci_in = fdopen(rpvect[0], "r"); 1365 if (mci->mci_in == NULL) 1366 { 1367 syserr("deliver: cannot create mailer input channel, fd=%d", 1368 mpvect[1]); 1369 (void) close(rpvect[0]); 1370 fclose(mci->mci_out); 1371 mci->mci_out = NULL; 1372 rcode = EX_OSERR; 1373 goto give_up; 1374 } 1375 } 1376 else 1377 { 1378 mci->mci_flags |= MCIF_TEMP; 1379 mci->mci_in = NULL; 1380 } 1381 } 1382 1383 /* 1384 ** If we are in SMTP opening state, send initial protocol. 1385 */ 1386 1387 if (clever && mci->mci_state != MCIS_CLOSED) 1388 { 1389 smtpinit(m, mci, e); 1390 } 1391 1392 if (bitset(EF_HAS8BIT, e->e_flags) && bitnset(M_7BITS, m->m_flags)) 1393 mci->mci_flags |= MCIF_CVT8TO7; 1394 else 1395 mci->mci_flags &= ~MCIF_CVT8TO7; 1396 1397 if (tTd(11, 1)) 1398 { 1399 printf("openmailer: "); 1400 mci_dump(mci, FALSE); 1401 } 1402 1403 if (mci->mci_state != MCIS_OPEN) 1404 { 1405 /* couldn't open the mailer */ 1406 rcode = mci->mci_exitstat; 1407 errno = mci->mci_errno; 1408 #if NAMED_BIND 1409 h_errno = mci->mci_herrno; 1410 #endif 1411 if (rcode == EX_OK) 1412 { 1413 /* shouldn't happen */ 1414 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1415 rcode, mci->mci_state, firstsig); 1416 rcode = EX_SOFTWARE; 1417 } 1418 else if (rcode == EX_TEMPFAIL && curhost != NULL && *curhost != '\0') 1419 { 1420 /* try next MX site */ 1421 goto tryhost; 1422 } 1423 } 1424 else if (!clever) 1425 { 1426 /* 1427 ** Format and send message. 1428 */ 1429 1430 putfromline(mci, e); 1431 (*e->e_puthdr)(mci, e->e_header, e); 1432 (*e->e_putbody)(mci, e, NULL); 1433 1434 /* get the exit status */ 1435 rcode = endmailer(mci, e, pv); 1436 } 1437 else 1438 #ifdef SMTP 1439 { 1440 /* 1441 ** Send the MAIL FROM: protocol 1442 */ 1443 1444 rcode = smtpmailfrom(m, mci, e); 1445 if (rcode == EX_OK) 1446 { 1447 register char *t = tobuf; 1448 register int i; 1449 1450 /* send the recipient list */ 1451 tobuf[0] = '\0'; 1452 for (to = tochain; to != NULL; to = to->q_tchain) 1453 { 1454 e->e_to = to->q_paddr; 1455 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1456 { 1457 markfailure(e, to, i); 1458 giveresponse(i, m, mci, ctladdr, e); 1459 } 1460 else 1461 { 1462 *t++ = ','; 1463 for (p = to->q_paddr; *p; *t++ = *p++) 1464 continue; 1465 *t = '\0'; 1466 } 1467 } 1468 1469 /* now send the data */ 1470 if (tobuf[0] == '\0') 1471 { 1472 rcode = EX_OK; 1473 e->e_to = NULL; 1474 if (bitset(MCIF_CACHED, mci->mci_flags)) 1475 smtprset(m, mci, e); 1476 } 1477 else 1478 { 1479 e->e_to = tobuf + 1; 1480 rcode = smtpdata(m, mci, e); 1481 } 1482 1483 /* now close the connection */ 1484 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1485 smtpquit(m, mci, e); 1486 } 1487 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1488 { 1489 /* try next MX site */ 1490 goto tryhost; 1491 } 1492 } 1493 #else /* not SMTP */ 1494 { 1495 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1496 rcode = EX_CONFIG; 1497 goto give_up; 1498 } 1499 #endif /* SMTP */ 1500 #if NAMED_BIND 1501 if (ConfigLevel < 2) 1502 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1503 #endif 1504 1505 /* arrange a return receipt if requested */ 1506 if (rcode == EX_OK && e->e_receiptto != NULL && 1507 bitnset(M_LOCALMAILER, m->m_flags)) 1508 { 1509 e->e_flags |= EF_SENDRECEIPT; 1510 /* do we want to send back more info? */ 1511 } 1512 1513 /* 1514 ** Do final status disposal. 1515 ** We check for something in tobuf for the SMTP case. 1516 ** If we got a temporary failure, arrange to queue the 1517 ** addressees. 1518 */ 1519 1520 give_up: 1521 if (tobuf[0] != '\0') 1522 giveresponse(rcode, m, mci, ctladdr, e); 1523 for (to = tochain; to != NULL; to = to->q_tchain) 1524 { 1525 if (rcode != EX_OK) 1526 markfailure(e, to, rcode); 1527 else 1528 { 1529 to->q_flags |= QSENT; 1530 e->e_nsent++; 1531 if (bitnset(M_LOCALMAILER, m->m_flags) && 1532 (e->e_receiptto != NULL || 1533 bitset(QPINGONSUCCESS, to->q_flags))) 1534 { 1535 to->q_flags |= QREPORT; 1536 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1537 to->q_paddr); 1538 } 1539 } 1540 } 1541 1542 /* 1543 ** Restore state and return. 1544 */ 1545 1546 #ifdef XDEBUG 1547 { 1548 char wbuf[MAXLINE]; 1549 1550 /* make absolutely certain 0, 1, and 2 are in use */ 1551 sprintf(wbuf, "%s... end of deliver(%s)", 1552 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1553 m->m_name); 1554 checkfd012(wbuf); 1555 } 1556 #endif 1557 1558 errno = 0; 1559 define('g', (char *) NULL, e); 1560 return (rcode); 1561 } 1562 /* 1563 ** MARKFAILURE -- mark a failure on a specific address. 1564 ** 1565 ** Parameters: 1566 ** e -- the envelope we are sending. 1567 ** q -- the address to mark. 1568 ** rcode -- the code signifying the particular failure. 1569 ** 1570 ** Returns: 1571 ** none. 1572 ** 1573 ** Side Effects: 1574 ** marks the address (and possibly the envelope) with the 1575 ** failure so that an error will be returned or 1576 ** the message will be queued, as appropriate. 1577 */ 1578 1579 markfailure(e, q, rcode) 1580 register ENVELOPE *e; 1581 register ADDRESS *q; 1582 int rcode; 1583 { 1584 char buf[MAXLINE]; 1585 1586 switch (rcode) 1587 { 1588 case EX_OK: 1589 break; 1590 1591 case EX_TEMPFAIL: 1592 case EX_IOERR: 1593 case EX_OSERR: 1594 q->q_flags |= QQUEUEUP; 1595 break; 1596 1597 default: 1598 q->q_flags |= QBADADDR; 1599 break; 1600 } 1601 q->q_statdate = curtime(); 1602 q->q_statmta = newstr(CurHostName); 1603 } 1604 /* 1605 ** ENDMAILER -- Wait for mailer to terminate. 1606 ** 1607 ** We should never get fatal errors (e.g., segmentation 1608 ** violation), so we report those specially. For other 1609 ** errors, we choose a status message (into statmsg), 1610 ** and if it represents an error, we print it. 1611 ** 1612 ** Parameters: 1613 ** pid -- pid of mailer. 1614 ** e -- the current envelope. 1615 ** pv -- the parameter vector that invoked the mailer 1616 ** (for error messages). 1617 ** 1618 ** Returns: 1619 ** exit code of mailer. 1620 ** 1621 ** Side Effects: 1622 ** none. 1623 */ 1624 1625 endmailer(mci, e, pv) 1626 register MCI *mci; 1627 register ENVELOPE *e; 1628 char **pv; 1629 { 1630 int st; 1631 1632 /* close any connections */ 1633 if (mci->mci_in != NULL) 1634 (void) xfclose(mci->mci_in, mci->mci_mailer->m_name, "mci_in"); 1635 if (mci->mci_out != NULL) 1636 (void) xfclose(mci->mci_out, mci->mci_mailer->m_name, "mci_out"); 1637 mci->mci_in = mci->mci_out = NULL; 1638 mci->mci_state = MCIS_CLOSED; 1639 1640 /* in the IPC case there is nothing to wait for */ 1641 if (mci->mci_pid == 0) 1642 return (EX_OK); 1643 1644 /* wait for the mailer process to die and collect status */ 1645 st = waitfor(mci->mci_pid); 1646 if (st == -1) 1647 { 1648 syserr("endmailer %s: wait", pv[0]); 1649 return (EX_SOFTWARE); 1650 } 1651 1652 if (WIFEXITED(st)) 1653 { 1654 /* normal death -- return status */ 1655 return (WEXITSTATUS(st)); 1656 } 1657 1658 /* it died a horrid death */ 1659 syserr("451 mailer %s died with signal %o", 1660 mci->mci_mailer->m_name, st); 1661 1662 /* log the arguments */ 1663 if (pv != NULL && e->e_xfp != NULL) 1664 { 1665 register char **av; 1666 1667 fprintf(e->e_xfp, "Arguments:"); 1668 for (av = pv; *av != NULL; av++) 1669 fprintf(e->e_xfp, " %s", *av); 1670 fprintf(e->e_xfp, "\n"); 1671 } 1672 1673 ExitStat = EX_TEMPFAIL; 1674 return (EX_TEMPFAIL); 1675 } 1676 /* 1677 ** GIVERESPONSE -- Interpret an error response from a mailer 1678 ** 1679 ** Parameters: 1680 ** stat -- the status code from the mailer (high byte 1681 ** only; core dumps must have been taken care of 1682 ** already). 1683 ** m -- the mailer info for this mailer. 1684 ** mci -- the mailer connection info -- can be NULL if the 1685 ** response is given before the connection is made. 1686 ** ctladdr -- the controlling address for the recipient 1687 ** address(es). 1688 ** e -- the current envelope. 1689 ** 1690 ** Returns: 1691 ** none. 1692 ** 1693 ** Side Effects: 1694 ** Errors may be incremented. 1695 ** ExitStat may be set. 1696 */ 1697 1698 giveresponse(stat, m, mci, ctladdr, e) 1699 int stat; 1700 register MAILER *m; 1701 register MCI *mci; 1702 ADDRESS *ctladdr; 1703 ENVELOPE *e; 1704 { 1705 register const char *statmsg; 1706 extern char *SysExMsg[]; 1707 register int i; 1708 extern int N_SysEx; 1709 char buf[MAXLINE]; 1710 1711 /* 1712 ** Compute status message from code. 1713 */ 1714 1715 i = stat - EX__BASE; 1716 if (stat == 0) 1717 { 1718 statmsg = "250 Sent"; 1719 if (e->e_statmsg != NULL) 1720 { 1721 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1722 statmsg = buf; 1723 } 1724 } 1725 else if (i < 0 || i > N_SysEx) 1726 { 1727 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1728 stat = EX_UNAVAILABLE; 1729 statmsg = buf; 1730 } 1731 else if (stat == EX_TEMPFAIL) 1732 { 1733 (void) strcpy(buf, SysExMsg[i] + 1); 1734 #if NAMED_BIND 1735 if (h_errno == TRY_AGAIN) 1736 statmsg = errstring(h_errno+E_DNSBASE); 1737 else 1738 #endif 1739 { 1740 if (errno != 0) 1741 statmsg = errstring(errno); 1742 else 1743 { 1744 #ifdef SMTP 1745 statmsg = SmtpError; 1746 #else /* SMTP */ 1747 statmsg = NULL; 1748 #endif /* SMTP */ 1749 } 1750 } 1751 if (statmsg != NULL && statmsg[0] != '\0') 1752 { 1753 (void) strcat(buf, ": "); 1754 (void) strcat(buf, statmsg); 1755 } 1756 statmsg = buf; 1757 } 1758 #if NAMED_BIND 1759 else if (stat == EX_NOHOST && h_errno != 0) 1760 { 1761 statmsg = errstring(h_errno + E_DNSBASE); 1762 (void) sprintf(buf, "%s (%s)", SysExMsg[i] + 1, statmsg); 1763 statmsg = buf; 1764 } 1765 #endif 1766 else 1767 { 1768 statmsg = SysExMsg[i]; 1769 if (*statmsg++ == ':') 1770 { 1771 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1772 statmsg = buf; 1773 } 1774 } 1775 1776 /* 1777 ** Print the message as appropriate 1778 */ 1779 1780 if (stat == EX_OK || stat == EX_TEMPFAIL) 1781 { 1782 extern char MsgBuf[]; 1783 1784 message("%s", &statmsg[4]); 1785 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1786 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1787 } 1788 else 1789 { 1790 char mbuf[8]; 1791 1792 Errors++; 1793 sprintf(mbuf, "%.3s %%s", statmsg); 1794 usrerr(mbuf, &statmsg[4]); 1795 } 1796 1797 /* 1798 ** Final cleanup. 1799 ** Log a record of the transaction. Compute the new 1800 ** ExitStat -- if we already had an error, stick with 1801 ** that. 1802 */ 1803 1804 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1805 logdelivery(m, mci, &statmsg[4], ctladdr, e); 1806 1807 if (tTd(11, 2)) 1808 printf("giveresponse: stat=%d, e->e_message=%s\n", 1809 stat, e->e_message); 1810 1811 if (stat != EX_TEMPFAIL) 1812 setstat(stat); 1813 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1814 { 1815 if (e->e_message != NULL) 1816 free(e->e_message); 1817 e->e_message = newstr(&statmsg[4]); 1818 } 1819 errno = 0; 1820 #if NAMED_BIND 1821 h_errno = 0; 1822 #endif 1823 } 1824 /* 1825 ** LOGDELIVERY -- log the delivery in the system log 1826 ** 1827 ** Care is taken to avoid logging lines that are too long, because 1828 ** some versions of syslog have an unfortunate proclivity for core 1829 ** dumping. This is a hack, to be sure, that is at best empirical. 1830 ** 1831 ** Parameters: 1832 ** m -- the mailer info. Can be NULL for initial queue. 1833 ** mci -- the mailer connection info -- can be NULL if the 1834 ** log is occuring when no connection is active. 1835 ** stat -- the message to print for the status. 1836 ** ctladdr -- the controlling address for the to list. 1837 ** e -- the current envelope. 1838 ** 1839 ** Returns: 1840 ** none 1841 ** 1842 ** Side Effects: 1843 ** none 1844 */ 1845 1846 logdelivery(m, mci, stat, ctladdr, e) 1847 MAILER *m; 1848 register MCI *mci; 1849 char *stat; 1850 ADDRESS *ctladdr; 1851 register ENVELOPE *e; 1852 { 1853 # ifdef LOG 1854 register char *bp; 1855 register char *p; 1856 int l; 1857 char buf[512]; 1858 1859 # if (SYSLOG_BUFSIZE) >= 256 1860 bp = buf; 1861 if (ctladdr != NULL) 1862 { 1863 strcpy(bp, ", ctladdr="); 1864 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 1865 bp += strlen(bp); 1866 if (bitset(QGOODUID, ctladdr->q_flags)) 1867 { 1868 (void) sprintf(bp, " (%d/%d)", 1869 ctladdr->q_uid, ctladdr->q_gid); 1870 bp += strlen(bp); 1871 } 1872 } 1873 1874 (void) sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1875 bp += strlen(bp); 1876 1877 if (m != NULL) 1878 { 1879 (void) strcpy(bp, ", mailer="); 1880 (void) strcat(bp, m->m_name); 1881 bp += strlen(bp); 1882 } 1883 1884 if (mci != NULL && mci->mci_host != NULL) 1885 { 1886 # ifdef DAEMON 1887 extern SOCKADDR CurHostAddr; 1888 # endif 1889 1890 (void) strcpy(bp, ", relay="); 1891 (void) strcat(bp, mci->mci_host); 1892 1893 # ifdef DAEMON 1894 (void) strcat(bp, " ["); 1895 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 1896 (void) strcat(bp, "]"); 1897 # endif 1898 } 1899 else if (strcmp(stat, "queued") != 0) 1900 { 1901 char *p = macvalue('h', e); 1902 1903 if (p != NULL && p[0] != '\0') 1904 { 1905 (void) strcpy(bp, ", relay="); 1906 (void) strcat(bp, p); 1907 } 1908 } 1909 bp += strlen(bp); 1910 1911 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 1912 #if (STATLEN) < 63 1913 # undef STATLEN 1914 # define STATLEN 63 1915 #endif 1916 #if (STATLEN) > 203 1917 # undef STATLEN 1918 # define STATLEN 203 1919 #endif 1920 1921 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 1922 { 1923 /* desperation move -- truncate data */ 1924 bp = buf + sizeof buf - ((STATLEN) + 17); 1925 strcpy(bp, "..."); 1926 bp += 3; 1927 } 1928 1929 (void) strcpy(bp, ", stat="); 1930 bp += strlen(bp); 1931 1932 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 1933 1934 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 1935 p = e->e_to; 1936 while (strlen(p) >= l) 1937 { 1938 register char *q = strchr(p + l, ','); 1939 1940 if (q == NULL) 1941 break; 1942 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 1943 e->e_id, ++q - p, p, buf); 1944 p = q; 1945 } 1946 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 1947 1948 # else /* we have a very short log buffer size */ 1949 1950 l = SYSLOG_BUFSIZE - 85; 1951 p = e->e_to; 1952 while (strlen(p) >= l) 1953 { 1954 register char *q = strchr(p + l, ','); 1955 1956 if (q == NULL) 1957 break; 1958 syslog(LOG_INFO, "%s: to=%.*s [more]", 1959 e->e_id, ++q - p, p); 1960 p = q; 1961 } 1962 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 1963 1964 if (ctladdr != NULL) 1965 { 1966 bp = buf; 1967 strcpy(buf, "ctladdr="); 1968 bp += strlen(buf); 1969 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 1970 bp += strlen(buf); 1971 if (bitset(QGOODUID, ctladdr->q_flags)) 1972 { 1973 (void) sprintf(bp, " (%d/%d)", 1974 ctladdr->q_uid, ctladdr->q_gid); 1975 bp += strlen(bp); 1976 } 1977 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1978 } 1979 bp = buf; 1980 sprintf(bp, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1981 bp += strlen(bp); 1982 1983 if (m != NULL) 1984 { 1985 sprintf(bp, ", mailer=%s", m->m_name); 1986 bp += strlen(bp); 1987 } 1988 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1989 1990 buf[0] = '\0'; 1991 if (mci != NULL && mci->mci_host != NULL) 1992 { 1993 # ifdef DAEMON 1994 extern SOCKADDR CurHostAddr; 1995 # endif 1996 1997 sprintf(buf, "relay=%s", mci->mci_host); 1998 1999 # ifdef DAEMON 2000 (void) strcat(buf, " ["); 2001 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 2002 (void) strcat(buf, "]"); 2003 # endif 2004 } 2005 else if (strcmp(stat, "queued") != 0) 2006 { 2007 char *p = macvalue('h', e); 2008 2009 if (p != NULL && p[0] != '\0') 2010 sprintf(buf, "relay=%s", p); 2011 } 2012 if (buf[0] != '\0') 2013 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 2014 2015 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 2016 # endif /* short log buffer */ 2017 # endif /* LOG */ 2018 } 2019 /* 2020 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 2021 ** 2022 ** This can be made an arbitrary message separator by changing $l 2023 ** 2024 ** One of the ugliest hacks seen by human eyes is contained herein: 2025 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 2026 ** does a well-meaning programmer such as myself have to deal with 2027 ** this kind of antique garbage???? 2028 ** 2029 ** Parameters: 2030 ** mci -- the connection information. 2031 ** e -- the envelope. 2032 ** 2033 ** Returns: 2034 ** none 2035 ** 2036 ** Side Effects: 2037 ** outputs some text to fp. 2038 */ 2039 2040 putfromline(mci, e) 2041 register MCI *mci; 2042 ENVELOPE *e; 2043 { 2044 char *template = "\201l\n"; 2045 char buf[MAXLINE]; 2046 2047 if (bitnset(M_NHDR, mci->mci_mailer->m_flags)) 2048 return; 2049 2050 # ifdef UGLYUUCP 2051 if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags)) 2052 { 2053 char *bang; 2054 char xbuf[MAXLINE]; 2055 2056 expand("\201g", buf, &buf[sizeof buf - 1], e); 2057 bang = strchr(buf, '!'); 2058 if (bang == NULL) 2059 { 2060 errno = 0; 2061 syserr("554 No ! in UUCP From address! (%s given)", buf); 2062 } 2063 else 2064 { 2065 *bang++ = '\0'; 2066 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 2067 template = xbuf; 2068 } 2069 } 2070 # endif /* UGLYUUCP */ 2071 expand(template, buf, &buf[sizeof buf - 1], e); 2072 putline(buf, mci); 2073 } 2074 /* 2075 ** PUTBODY -- put the body of a message. 2076 ** 2077 ** Parameters: 2078 ** mci -- the connection information. 2079 ** e -- the envelope to put out. 2080 ** separator -- if non-NULL, a message separator that must 2081 ** not be permitted in the resulting message. 2082 ** 2083 ** Returns: 2084 ** none. 2085 ** 2086 ** Side Effects: 2087 ** The message is written onto fp. 2088 */ 2089 2090 /* values for output state variable */ 2091 #define OS_HEAD 0 /* at beginning of line */ 2092 #define OS_CR 1 /* read a carriage return */ 2093 #define OS_INLINE 2 /* putting rest of line */ 2094 2095 putbody(mci, e, separator) 2096 register MCI *mci; 2097 register ENVELOPE *e; 2098 char *separator; 2099 { 2100 char buf[MAXLINE]; 2101 2102 /* 2103 ** Output the body of the message 2104 */ 2105 2106 if (e->e_dfp == NULL && e->e_df != NULL) 2107 { 2108 e->e_dfp = fopen(e->e_df, "r"); 2109 if (e->e_dfp == NULL) 2110 syserr("putbody: Cannot open %s for %s from %s", 2111 e->e_df, e->e_to, e->e_from.q_paddr); 2112 } 2113 if (e->e_dfp == NULL) 2114 { 2115 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2116 { 2117 putline("", mci); 2118 mci->mci_flags &= ~MCIF_INHEADER; 2119 } 2120 putline("<<< No Message Collected >>>", mci); 2121 goto endofmessage; 2122 } 2123 if (e->e_dfino == (ino_t) 0) 2124 { 2125 struct stat stbuf; 2126 2127 if (fstat(fileno(e->e_dfp), &stbuf) < 0) 2128 e->e_dfino = -1; 2129 else 2130 { 2131 e->e_dfdev = stbuf.st_dev; 2132 e->e_dfino = stbuf.st_ino; 2133 } 2134 } 2135 rewind(e->e_dfp); 2136 2137 if (bitset(MCIF_CVT8TO7, mci->mci_flags)) 2138 { 2139 /* 2140 ** Do 8 to 7 bit MIME conversion. 2141 */ 2142 2143 /* make sure it looks like a MIME message */ 2144 if (hvalue("MIME-Version", e->e_header) == NULL) 2145 putline("MIME-Version: 1.0", mci); 2146 2147 if (hvalue("Content-Type", e->e_header) == NULL) 2148 { 2149 sprintf(buf, "Content-Type: text/plain; charset=%s", 2150 defcharset(e)); 2151 putline(buf, mci); 2152 } 2153 2154 /* now do the hard work */ 2155 mime8to7(mci, e->e_header, e, NULL); 2156 } 2157 else 2158 { 2159 int ostate; 2160 register char *bp; 2161 register char *pbp; 2162 register int c; 2163 int padc; 2164 char *buflim; 2165 int pos; 2166 char peekbuf[10]; 2167 2168 /* we can pass it through unmodified */ 2169 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2170 { 2171 putline("", mci); 2172 mci->mci_flags &= ~MCIF_INHEADER; 2173 } 2174 2175 /* determine end of buffer; allow for short mailer lines */ 2176 buflim = &buf[sizeof buf - 1]; 2177 if (mci->mci_mailer->m_linelimit > 0 && 2178 mci->mci_mailer->m_linelimit < sizeof buf - 1) 2179 buflim = &buf[mci->mci_mailer->m_linelimit - 1]; 2180 2181 /* copy temp file to output with mapping */ 2182 ostate = OS_HEAD; 2183 bp = buf; 2184 pbp = peekbuf; 2185 while (!ferror(mci->mci_out)) 2186 { 2187 register char *xp; 2188 2189 if (pbp > peekbuf) 2190 c = *--pbp; 2191 else if ((c = fgetc(e->e_dfp)) == EOF) 2192 break; 2193 if (bitset(MCIF_7BIT, mci->mci_flags)) 2194 c &= 0x7f; 2195 switch (ostate) 2196 { 2197 case OS_HEAD: 2198 if (c != '\r' && c != '\n' && bp < buflim) 2199 { 2200 *bp++ = c; 2201 break; 2202 } 2203 2204 /* check beginning of line for special cases */ 2205 *bp = '\0'; 2206 pos = 0; 2207 padc = EOF; 2208 if (buf[0] == 'F' && 2209 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) && 2210 strncmp(buf, "From ", 5) == 0) 2211 { 2212 padc = '>'; 2213 } 2214 if (buf[0] == '-' && buf[1] == '-' && 2215 separator != NULL) 2216 { 2217 /* possible separator */ 2218 int sl = strlen(separator); 2219 2220 if (strncmp(&buf[2], separator, sl) == 0) 2221 padc = ' '; 2222 } 2223 if (buf[0] == '.' && 2224 bitnset(M_XDOT, mci->mci_mailer->m_flags)) 2225 { 2226 padc = '.'; 2227 } 2228 2229 /* now copy out saved line */ 2230 if (TrafficLogFile != NULL) 2231 { 2232 fprintf(TrafficLogFile, "%05d >>> ", getpid()); 2233 if (padc != EOF) 2234 fputc(padc, TrafficLogFile); 2235 for (xp = buf; xp < bp; xp++) 2236 fputc(*xp, TrafficLogFile); 2237 if (c == '\n') 2238 fputs(mci->mci_mailer->m_eol, 2239 TrafficLogFile); 2240 } 2241 if (padc != EOF) 2242 { 2243 fputc(padc, mci->mci_out); 2244 pos++; 2245 } 2246 for (xp = buf; xp < bp; xp++) 2247 fputc(*xp, mci->mci_out); 2248 if (c == '\n') 2249 { 2250 fputs(mci->mci_mailer->m_eol, 2251 mci->mci_out); 2252 pos = 0; 2253 } 2254 else 2255 { 2256 pos += bp - buf; 2257 if (c != '\r') 2258 *pbp++ = c; 2259 } 2260 bp = buf; 2261 2262 /* determine next state */ 2263 if (c == '\n') 2264 ostate = OS_HEAD; 2265 else if (c == '\r') 2266 ostate = OS_CR; 2267 else 2268 ostate = OS_INLINE; 2269 continue; 2270 2271 case OS_CR: 2272 if (c == '\n') 2273 { 2274 /* got CRLF */ 2275 fputs(mci->mci_mailer->m_eol, mci->mci_out); 2276 if (TrafficLogFile != NULL) 2277 { 2278 fputs(mci->mci_mailer->m_eol, 2279 TrafficLogFile); 2280 } 2281 ostate = OS_HEAD; 2282 continue; 2283 } 2284 2285 /* had a naked carriage return */ 2286 *pbp++ = c; 2287 c = '\r'; 2288 goto putch; 2289 2290 case OS_INLINE: 2291 if (c == '\r') 2292 { 2293 ostate = OS_CR; 2294 continue; 2295 } 2296 putch: 2297 if (mci->mci_mailer->m_linelimit > 0 && 2298 pos > mci->mci_mailer->m_linelimit && 2299 c != '\n') 2300 { 2301 putc('!', mci->mci_out); 2302 fputs(mci->mci_mailer->m_eol, mci->mci_out); 2303 if (TrafficLogFile != NULL) 2304 { 2305 fprintf(TrafficLogFile, "!%s", 2306 mci->mci_mailer->m_eol); 2307 } 2308 ostate = OS_HEAD; 2309 *pbp++ = c; 2310 continue; 2311 } 2312 if (TrafficLogFile != NULL) 2313 fputc(c, TrafficLogFile); 2314 putc(c, mci->mci_out); 2315 pos++; 2316 ostate = c == '\n' ? OS_HEAD : OS_INLINE; 2317 break; 2318 } 2319 } 2320 } 2321 2322 if (ferror(e->e_dfp)) 2323 { 2324 syserr("putbody: %s: read error", e->e_df); 2325 ExitStat = EX_IOERR; 2326 } 2327 2328 endofmessage: 2329 /* some mailers want extra blank line at end of message */ 2330 if (bitnset(M_BLANKEND, mci->mci_mailer->m_flags) && 2331 buf[0] != '\0' && buf[0] != '\n') 2332 putline("", mci); 2333 2334 (void) fflush(mci->mci_out); 2335 if (ferror(mci->mci_out) && errno != EPIPE) 2336 { 2337 syserr("putbody: write error"); 2338 ExitStat = EX_IOERR; 2339 } 2340 errno = 0; 2341 } 2342 /* 2343 ** MAILFILE -- Send a message to a file. 2344 ** 2345 ** If the file has the setuid/setgid bits set, but NO execute 2346 ** bits, sendmail will try to become the owner of that file 2347 ** rather than the real user. Obviously, this only works if 2348 ** sendmail runs as root. 2349 ** 2350 ** This could be done as a subordinate mailer, except that it 2351 ** is used implicitly to save messages in ~/dead.letter. We 2352 ** view this as being sufficiently important as to include it 2353 ** here. For example, if the system is dying, we shouldn't have 2354 ** to create another process plus some pipes to save the message. 2355 ** 2356 ** Parameters: 2357 ** filename -- the name of the file to send to. 2358 ** ctladdr -- the controlling address header -- includes 2359 ** the userid/groupid to be when sending. 2360 ** 2361 ** Returns: 2362 ** The exit code associated with the operation. 2363 ** 2364 ** Side Effects: 2365 ** none. 2366 */ 2367 2368 mailfile(filename, ctladdr, e) 2369 char *filename; 2370 ADDRESS *ctladdr; 2371 register ENVELOPE *e; 2372 { 2373 register FILE *f; 2374 register int pid; 2375 int mode; 2376 2377 if (tTd(11, 1)) 2378 { 2379 printf("mailfile %s\n ctladdr=", filename); 2380 printaddr(ctladdr, FALSE); 2381 } 2382 2383 if (e->e_xfp != NULL) 2384 fflush(e->e_xfp); 2385 2386 /* 2387 ** Fork so we can change permissions here. 2388 ** Note that we MUST use fork, not vfork, because of 2389 ** the complications of calling subroutines, etc. 2390 */ 2391 2392 DOFORK(fork); 2393 2394 if (pid < 0) 2395 return (EX_OSERR); 2396 else if (pid == 0) 2397 { 2398 /* child -- actually write to file */ 2399 struct stat stb; 2400 MCI mcibuf; 2401 2402 (void) setsignal(SIGINT, SIG_DFL); 2403 (void) setsignal(SIGHUP, SIG_DFL); 2404 (void) setsignal(SIGTERM, SIG_DFL); 2405 (void) umask(OldUmask); 2406 2407 if (stat(filename, &stb) < 0) 2408 stb.st_mode = FileMode; 2409 mode = stb.st_mode; 2410 2411 /* limit the errors to those actually caused in the child */ 2412 errno = 0; 2413 ExitStat = EX_OK; 2414 2415 if (bitset(0111, stb.st_mode)) 2416 exit(EX_CANTCREAT); 2417 if (ctladdr != NULL) 2418 { 2419 /* ignore setuid and setgid bits */ 2420 mode &= ~(S_ISGID|S_ISUID); 2421 } 2422 2423 /* we have to open the dfile BEFORE setuid */ 2424 if (e->e_dfp == NULL && e->e_df != NULL) 2425 { 2426 e->e_dfp = fopen(e->e_df, "r"); 2427 if (e->e_dfp == NULL) 2428 { 2429 syserr("mailfile: Cannot open %s for %s from %s", 2430 e->e_df, e->e_to, e->e_from.q_paddr); 2431 } 2432 } 2433 2434 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 2435 { 2436 if (ctladdr == NULL || ctladdr->q_uid == 0) 2437 { 2438 (void) initgroups(DefUser, DefGid); 2439 } 2440 else 2441 { 2442 (void) initgroups(ctladdr->q_ruser ? 2443 ctladdr->q_ruser : ctladdr->q_user, 2444 ctladdr->q_gid); 2445 } 2446 } 2447 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 2448 { 2449 if (ctladdr == NULL || ctladdr->q_uid == 0) 2450 (void) setuid(DefUid); 2451 else 2452 (void) setuid(ctladdr->q_uid); 2453 } 2454 FileName = filename; 2455 LineNumber = 0; 2456 f = dfopen(filename, O_WRONLY|O_CREAT|O_APPEND, FileMode); 2457 if (f == NULL) 2458 { 2459 message("554 cannot open: %s", errstring(errno)); 2460 exit(EX_CANTCREAT); 2461 } 2462 2463 bzero(&mcibuf, sizeof mcibuf); 2464 mcibuf.mci_mailer = FileMailer; 2465 mcibuf.mci_out = f; 2466 if (bitnset(M_7BITS, FileMailer->m_flags)) 2467 mcibuf.mci_flags |= MCIF_7BIT; 2468 2469 putfromline(&mcibuf, e); 2470 (*e->e_puthdr)(&mcibuf, e->e_header, e); 2471 (*e->e_putbody)(&mcibuf, e, NULL); 2472 putline("\n", &mcibuf); 2473 if (ferror(f)) 2474 { 2475 message("451 I/O error: %s", errstring(errno)); 2476 setstat(EX_IOERR); 2477 } 2478 (void) xfclose(f, "mailfile", filename); 2479 (void) fflush(stdout); 2480 2481 /* reset ISUID & ISGID bits for paranoid systems */ 2482 (void) chmod(filename, (int) stb.st_mode); 2483 exit(ExitStat); 2484 /*NOTREACHED*/ 2485 } 2486 else 2487 { 2488 /* parent -- wait for exit status */ 2489 int st; 2490 2491 st = waitfor(pid); 2492 if (WIFEXITED(st)) 2493 return (WEXITSTATUS(st)); 2494 else 2495 { 2496 syserr("child died on signal %d", st); 2497 return (EX_UNAVAILABLE); 2498 } 2499 /*NOTREACHED*/ 2500 } 2501 } 2502 /* 2503 ** HOSTSIGNATURE -- return the "signature" for a host. 2504 ** 2505 ** The signature describes how we are going to send this -- it 2506 ** can be just the hostname (for non-Internet hosts) or can be 2507 ** an ordered list of MX hosts. 2508 ** 2509 ** Parameters: 2510 ** m -- the mailer describing this host. 2511 ** host -- the host name. 2512 ** e -- the current envelope. 2513 ** 2514 ** Returns: 2515 ** The signature for this host. 2516 ** 2517 ** Side Effects: 2518 ** Can tweak the symbol table. 2519 */ 2520 2521 char * 2522 hostsignature(m, host, e) 2523 register MAILER *m; 2524 char *host; 2525 ENVELOPE *e; 2526 { 2527 register char *p; 2528 register STAB *s; 2529 int i; 2530 int len; 2531 #if NAMED_BIND 2532 int nmx; 2533 auto int rcode; 2534 char *hp; 2535 char *endp; 2536 int oldoptions; 2537 char *mxhosts[MAXMXHOSTS + 1]; 2538 #endif 2539 2540 /* 2541 ** Check to see if this uses IPC -- if not, it can't have MX records. 2542 */ 2543 2544 p = m->m_mailer; 2545 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2546 { 2547 /* just an ordinary mailer */ 2548 return host; 2549 } 2550 2551 /* 2552 ** Look it up in the symbol table. 2553 */ 2554 2555 s = stab(host, ST_HOSTSIG, ST_ENTER); 2556 if (s->s_hostsig != NULL) 2557 return s->s_hostsig; 2558 2559 /* 2560 ** Not already there -- create a signature. 2561 */ 2562 2563 #if NAMED_BIND 2564 if (ConfigLevel < 2) 2565 { 2566 oldoptions = _res.options; 2567 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2568 } 2569 2570 for (hp = host; hp != NULL; hp = endp) 2571 { 2572 endp = strchr(hp, ':'); 2573 if (endp != NULL) 2574 *endp = '\0'; 2575 2576 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2577 2578 if (nmx <= 0) 2579 { 2580 register MCI *mci; 2581 2582 /* update the connection info for this host */ 2583 mci = mci_get(hp, m); 2584 mci->mci_exitstat = rcode; 2585 mci->mci_errno = errno; 2586 #if NAMED_BIND 2587 mci->mci_herrno = h_errno; 2588 #endif 2589 2590 /* and return the original host name as the signature */ 2591 nmx = 1; 2592 mxhosts[0] = hp; 2593 } 2594 2595 len = 0; 2596 for (i = 0; i < nmx; i++) 2597 { 2598 len += strlen(mxhosts[i]) + 1; 2599 } 2600 if (s->s_hostsig != NULL) 2601 len += strlen(s->s_hostsig) + 1; 2602 p = xalloc(len); 2603 if (s->s_hostsig != NULL) 2604 { 2605 (void) strcpy(p, s->s_hostsig); 2606 free(s->s_hostsig); 2607 s->s_hostsig = p; 2608 p += strlen(p); 2609 *p++ = ':'; 2610 } 2611 else 2612 s->s_hostsig = p; 2613 for (i = 0; i < nmx; i++) 2614 { 2615 if (i != 0) 2616 *p++ = ':'; 2617 strcpy(p, mxhosts[i]); 2618 p += strlen(p); 2619 } 2620 if (endp != NULL) 2621 *endp++ = ':'; 2622 } 2623 makelower(s->s_hostsig); 2624 if (ConfigLevel < 2) 2625 _res.options = oldoptions; 2626 #else 2627 /* not using BIND -- the signature is just the host name */ 2628 s->s_hostsig = host; 2629 #endif 2630 if (tTd(17, 1)) 2631 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2632 return s->s_hostsig; 2633 } 2634 /* 2635 ** SETSTATUS -- set the address status for return messages 2636 ** 2637 ** Parameters: 2638 ** a -- the address to set. 2639 ** msg -- the text of the message, which must be in standard 2640 ** SMTP form (3 digits, a space, and a message). 2641 ** 2642 ** Returns: 2643 ** none. 2644 */ 2645 2646 setstatus(a, msg) 2647 register ADDRESS *a; 2648 char *msg; 2649 { 2650 char buf[MAXLINE]; 2651 2652 if (a->q_status != NULL) 2653 free(a->q_status); 2654 if (strlen(msg) > 4) 2655 { 2656 register char *p, *q; 2657 int parenlev = 0; 2658 2659 strncpy(buf, msg, 4); 2660 p = &buf[4]; 2661 *p++ = '('; 2662 for (q = &msg[4]; *q != NULL; q++) 2663 { 2664 switch (*q) 2665 { 2666 case '(': 2667 parenlev++; 2668 break; 2669 2670 case ')': 2671 if (parenlev > 0) 2672 parenlev--; 2673 else 2674 *p++ = '\\'; 2675 break; 2676 } 2677 *p++ = *q; 2678 } 2679 while (parenlev-- >= 0) 2680 *p++ = ')'; 2681 *p++ = '\0'; 2682 msg = buf; 2683 } 2684 a->q_status = newstr(msg); 2685 } 2686