1 /* 2 * Copyright (c) 1983, 1995 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 8.145 (Berkeley) 04/22/95"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <errno.h> 15 #if NAMED_BIND 16 #include <resolv.h> 17 18 extern int h_errno; 19 #endif 20 21 extern char SmtpError[]; 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 void 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 oldverbose = Verbose; 52 bool somedeliveries = FALSE; 53 int pid; 54 extern void sendenvelope(); 55 56 /* 57 ** If we have had global, fatal errors, don't bother sending 58 ** the message at all if we are in SMTP mode. Local errors 59 ** (e.g., a single address failing) will still cause the other 60 ** addresses to be sent. 61 */ 62 63 if (bitset(EF_FATALERRS, e->e_flags) && 64 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 65 { 66 e->e_flags |= EF_CLRQUEUE; 67 return; 68 } 69 70 /* determine actual delivery mode */ 71 CurrentLA = getla(); 72 if (mode == SM_DEFAULT) 73 { 74 mode = e->e_sendmode; 75 if (mode != SM_VERIFY && 76 shouldqueue(e->e_msgpriority, e->e_ctime)) 77 mode = SM_QUEUE; 78 } 79 80 if (tTd(13, 1)) 81 { 82 extern void printenvflags(); 83 84 printf("\n===== SENDALL: mode %c, id %s, e_from ", 85 mode, e->e_id); 86 printaddr(&e->e_from, FALSE); 87 printf("\te_flags = "); 88 printenvflags(e); 89 printf("sendqueue:\n"); 90 printaddr(e->e_sendqueue, TRUE); 91 } 92 93 /* 94 ** Do any preprocessing necessary for the mode we are running. 95 ** Check to make sure the hop count is reasonable. 96 ** Delete sends to the sender in mailing lists. 97 */ 98 99 CurEnv = e; 100 101 if (e->e_hopcount > MaxHopCount) 102 { 103 errno = 0; 104 queueup(e, TRUE, mode == SM_QUEUE); 105 e->e_flags |= EF_FATALERRS|EF_PM_NOTIFY|EF_CLRQUEUE; 106 syserr("554 Too many hops %d (%d max): from %s via %s, to %s", 107 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 108 RealHostName == NULL ? "localhost" : RealHostName, 109 e->e_sendqueue->q_paddr); 110 e->e_sendqueue->q_status = "5.4.6"; 111 return; 112 } 113 114 /* 115 ** Do sender deletion. 116 ** 117 ** If the sender has the QQUEUEUP flag set, skip this. 118 ** This can happen if the name server is hosed when you 119 ** are trying to send mail. The result is that the sender 120 ** is instantiated in the queue as a recipient. 121 */ 122 123 if (!bitset(EF_METOO, e->e_flags) && 124 !bitset(QQUEUEUP, e->e_from.q_flags)) 125 { 126 if (tTd(13, 5)) 127 { 128 printf("sendall: QDONTSEND "); 129 printaddr(&e->e_from, FALSE); 130 } 131 e->e_from.q_flags |= QDONTSEND; 132 (void) recipient(&e->e_from, &e->e_sendqueue, 0, e); 133 } 134 135 /* 136 ** Handle alias owners. 137 ** 138 ** We scan up the q_alias chain looking for owners. 139 ** We discard owners that are the same as the return path. 140 */ 141 142 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 143 { 144 register struct address *a; 145 146 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 147 continue; 148 if (a != NULL) 149 q->q_owner = a->q_owner; 150 151 if (q->q_owner != NULL && 152 !bitset(QDONTSEND, q->q_flags) && 153 strcmp(q->q_owner, e->e_from.q_paddr) == 0) 154 q->q_owner = NULL; 155 } 156 157 owner = ""; 158 otherowners = 1; 159 while (owner != NULL && otherowners > 0) 160 { 161 owner = NULL; 162 otherowners = 0; 163 164 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 165 { 166 if (bitset(QDONTSEND, q->q_flags)) 167 continue; 168 169 if (q->q_owner != NULL) 170 { 171 if (owner == NULL) 172 owner = q->q_owner; 173 else if (owner != q->q_owner) 174 { 175 if (strcmp(owner, q->q_owner) == 0) 176 { 177 /* make future comparisons cheap */ 178 q->q_owner = owner; 179 } 180 else 181 { 182 otherowners++; 183 } 184 owner = q->q_owner; 185 } 186 } 187 else 188 { 189 otherowners++; 190 } 191 192 /* 193 ** If this mailer is expensive, and if we don't 194 ** want to make connections now, just mark these 195 ** addresses and return. This is useful if we 196 ** want to batch connections to reduce load. This 197 ** will cause the messages to be queued up, and a 198 ** daemon will come along to send the messages later. 199 */ 200 201 if (bitset(QBADADDR|QQUEUEUP, q->q_flags)) 202 continue; 203 if (NoConnect && !Verbose && 204 bitnset(M_EXPENSIVE, q->q_mailer->m_flags)) 205 { 206 q->q_flags |= QQUEUEUP; 207 e->e_to = q->q_paddr; 208 message("queued"); 209 if (LogLevel > 8) 210 logdelivery(q->q_mailer, NULL, 211 "queued", NULL, 212 (time_t) 0, e); 213 e->e_to = NULL; 214 } 215 else 216 { 217 somedeliveries = TRUE; 218 } 219 } 220 221 if (owner != NULL && otherowners > 0) 222 { 223 extern HDR *copyheader(); 224 extern ADDRESS *copyqueue(); 225 226 /* 227 ** Split this envelope into two. 228 */ 229 230 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 231 *ee = *e; 232 ee->e_id = NULL; 233 (void) queuename(ee, '\0'); 234 235 if (tTd(13, 1)) 236 printf("sendall: split %s into %s\n", 237 e->e_id, ee->e_id); 238 239 ee->e_header = copyheader(e->e_header); 240 ee->e_sendqueue = copyqueue(e->e_sendqueue); 241 ee->e_errorqueue = copyqueue(e->e_errorqueue); 242 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS|EF_SENDRECEIPT|EF_RET_PARAM); 243 ee->e_flags |= EF_NORECEIPT; 244 setsender(owner, ee, NULL, TRUE); 245 if (tTd(13, 5)) 246 { 247 printf("sendall(split): QDONTSEND "); 248 printaddr(&ee->e_from, FALSE); 249 } 250 ee->e_from.q_flags |= QDONTSEND; 251 ee->e_dfp = NULL; 252 ee->e_xfp = NULL; 253 ee->e_errormode = EM_MAIL; 254 ee->e_sibling = splitenv; 255 splitenv = ee; 256 257 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 258 { 259 if (q->q_owner == owner) 260 { 261 q->q_flags |= QDONTSEND; 262 q->q_flags &= ~QQUEUEUP; 263 } 264 } 265 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 266 { 267 if (q->q_owner != owner) 268 { 269 q->q_flags |= QDONTSEND; 270 q->q_flags &= ~QQUEUEUP; 271 } 272 else 273 { 274 /* clear DSN parameters */ 275 q->q_flags &= ~(QHASNOTIFY|QPINGONSUCCESS); 276 q->q_flags |= QPINGONFAILURE|QPINGONDELAY; 277 } 278 } 279 280 if (mode != SM_VERIFY && bitset(EF_HAS_DF, e->e_flags)) 281 { 282 char df1buf[20], df2buf[20]; 283 284 ee->e_dfp = NULL; 285 strcpy(df1buf, queuename(e, 'd')); 286 strcpy(df2buf, queuename(ee, 'd')); 287 if (link(df1buf, df2buf) < 0) 288 { 289 syserr("sendall: link(%s, %s)", 290 df1buf, df2buf); 291 } 292 } 293 #ifdef LOG 294 if (LogLevel > 4) 295 syslog(LOG_INFO, "%s: clone %s, owner=%s", 296 ee->e_id, e->e_id, owner); 297 #endif 298 } 299 } 300 301 if (owner != NULL) 302 { 303 setsender(owner, e, NULL, TRUE); 304 if (tTd(13, 5)) 305 { 306 printf("sendall(owner): QDONTSEND "); 307 printaddr(&e->e_from, FALSE); 308 } 309 e->e_from.q_flags |= QDONTSEND; 310 e->e_errormode = EM_MAIL; 311 e->e_flags |= EF_NORECEIPT; 312 } 313 314 /* if nothing to be delivered, just queue up everything */ 315 if (!somedeliveries && mode != SM_QUEUE && mode != SM_VERIFY) 316 mode = SM_QUEUE; 317 318 # ifdef QUEUE 319 if ((mode == SM_QUEUE || mode == SM_FORK || 320 (mode != SM_VERIFY && SuperSafe)) && 321 !bitset(EF_INQUEUE, e->e_flags)) 322 { 323 /* be sure everything is instantiated in the queue */ 324 queueup(e, TRUE, mode == SM_QUEUE); 325 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 326 queueup(ee, TRUE, mode == SM_QUEUE); 327 } 328 #endif /* QUEUE */ 329 330 /* 331 ** If we belong in background, fork now. 332 */ 333 334 switch (mode) 335 { 336 case SM_VERIFY: 337 Verbose = TRUE; 338 break; 339 340 case SM_QUEUE: 341 queueonly: 342 if (e->e_nrcpts > 0) 343 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 344 return; 345 346 case SM_FORK: 347 if (e->e_xfp != NULL) 348 (void) fflush(e->e_xfp); 349 350 # if !HASFLOCK 351 /* 352 ** Since fcntl locking has the interesting semantic that 353 ** the lock is owned by a process, not by an open file 354 ** descriptor, we have to flush this to the queue, and 355 ** then restart from scratch in the child. 356 */ 357 358 { 359 /* save id for future use */ 360 char *qid = e->e_id; 361 362 /* now drop the envelope in the parent */ 363 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 364 dropenvelope(e); 365 366 /* and reacquire in the child */ 367 (void) dowork(qid, TRUE, FALSE, e); 368 } 369 370 return; 371 372 # else /* HASFLOCK */ 373 374 pid = fork(); 375 if (pid < 0) 376 { 377 goto queueonly; 378 } 379 else if (pid > 0) 380 { 381 /* be sure we leave the temp files to our child */ 382 /* can't call unlockqueue to avoid unlink of xfp */ 383 if (e->e_lockfp != NULL) 384 (void) xfclose(e->e_lockfp, "sendenvelope lockfp", e->e_id); 385 e->e_lockfp = NULL; 386 387 /* close any random open files in the envelope */ 388 closexscript(e); 389 if (e->e_dfp != NULL) 390 (void) xfclose(e->e_dfp, "sendenvelope dfp", e->e_id); 391 e->e_dfp = NULL; 392 e->e_id = NULL; 393 e->e_flags &= ~EF_HAS_DF; 394 395 /* catch intermediate zombie */ 396 (void) waitfor(pid); 397 return; 398 } 399 400 /* double fork to avoid zombies */ 401 pid = fork(); 402 if (pid > 0) 403 exit(EX_OK); 404 405 /* be sure we are immune from the terminal */ 406 disconnect(1, e); 407 408 /* prevent parent from waiting if there was an error */ 409 if (pid < 0) 410 { 411 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 412 finis(); 413 } 414 415 /* 416 ** Close any cached connections. 417 ** 418 ** We don't send the QUIT protocol because the parent 419 ** still knows about the connection. 420 ** 421 ** This should only happen when delivering an error 422 ** message. 423 */ 424 425 mci_flush(FALSE, NULL); 426 427 # endif /* HASFLOCK */ 428 429 break; 430 } 431 432 if (splitenv != NULL) 433 { 434 if (tTd(13, 1)) 435 { 436 printf("\nsendall: Split queue; remaining queue:\n"); 437 printaddr(e->e_sendqueue, TRUE); 438 } 439 440 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 441 { 442 CurEnv = ee; 443 if (mode != SM_VERIFY) 444 openxscript(ee); 445 sendenvelope(ee, mode); 446 dropenvelope(ee); 447 } 448 449 CurEnv = e; 450 } 451 sendenvelope(e, mode); 452 Verbose = oldverbose; 453 } 454 455 void 456 sendenvelope(e, mode) 457 register ENVELOPE *e; 458 char mode; 459 { 460 register ADDRESS *q; 461 bool didany; 462 463 /* 464 ** If we have had global, fatal errors, don't bother sending 465 ** the message at all if we are in SMTP mode. Local errors 466 ** (e.g., a single address failing) will still cause the other 467 ** addresses to be sent. 468 */ 469 470 if (bitset(EF_FATALERRS, e->e_flags) && 471 (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 472 { 473 e->e_flags |= EF_CLRQUEUE; 474 return; 475 } 476 477 /* 478 ** Run through the list and send everything. 479 ** 480 ** Set EF_GLOBALERRS so that error messages during delivery 481 ** result in returned mail. 482 */ 483 484 e->e_nsent = 0; 485 e->e_flags |= EF_GLOBALERRS; 486 didany = FALSE; 487 488 /* now run through the queue */ 489 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 490 { 491 #ifdef XDEBUG 492 char wbuf[MAXNAME + 20]; 493 494 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 495 checkfd012(wbuf); 496 #endif 497 if (mode == SM_VERIFY) 498 { 499 e->e_to = q->q_paddr; 500 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 501 { 502 if (q->q_host != NULL && q->q_host[0] != '\0') 503 message("deliverable: mailer %s, host %s, user %s", 504 q->q_mailer->m_name, 505 q->q_host, 506 q->q_user); 507 else 508 message("deliverable: mailer %s, user %s", 509 q->q_mailer->m_name, 510 q->q_user); 511 } 512 } 513 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 514 { 515 # ifdef QUEUE 516 /* 517 ** Checkpoint the send list every few addresses 518 */ 519 520 if (e->e_nsent >= CheckpointInterval) 521 { 522 queueup(e, TRUE, FALSE); 523 e->e_nsent = 0; 524 } 525 # endif /* QUEUE */ 526 (void) deliver(e, q); 527 didany = TRUE; 528 } 529 } 530 if (didany) 531 { 532 e->e_dtime = curtime(); 533 e->e_ntries++; 534 } 535 536 #ifdef XDEBUG 537 checkfd012("end of sendenvelope"); 538 #endif 539 540 if (mode == SM_FORK) 541 finis(); 542 } 543 /* 544 ** DOFORK -- do a fork, retrying a couple of times on failure. 545 ** 546 ** This MUST be a macro, since after a vfork we are running 547 ** two processes on the same stack!!! 548 ** 549 ** Parameters: 550 ** none. 551 ** 552 ** Returns: 553 ** From a macro??? You've got to be kidding! 554 ** 555 ** Side Effects: 556 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 557 ** pid of child in parent, zero in child. 558 ** -1 on unrecoverable error. 559 ** 560 ** Notes: 561 ** I'm awfully sorry this looks so awful. That's 562 ** vfork for you..... 563 */ 564 565 # define NFORKTRIES 5 566 567 # ifndef FORK 568 # define FORK fork 569 # endif 570 571 # define DOFORK(fORKfN) \ 572 {\ 573 register int i;\ 574 \ 575 for (i = NFORKTRIES; --i >= 0; )\ 576 {\ 577 pid = fORKfN();\ 578 if (pid >= 0)\ 579 break;\ 580 if (i > 0)\ 581 sleep((unsigned) NFORKTRIES - i);\ 582 }\ 583 } 584 /* 585 ** DOFORK -- simple fork interface to DOFORK. 586 ** 587 ** Parameters: 588 ** none. 589 ** 590 ** Returns: 591 ** pid of child in parent. 592 ** zero in child. 593 ** -1 on error. 594 ** 595 ** Side Effects: 596 ** returns twice, once in parent and once in child. 597 */ 598 599 dofork() 600 { 601 register int pid = -1; 602 603 DOFORK(fork); 604 return (pid); 605 } 606 /* 607 ** DELIVER -- Deliver a message to a list of addresses. 608 ** 609 ** This routine delivers to everyone on the same host as the 610 ** user on the head of the list. It is clever about mailers 611 ** that don't handle multiple users. It is NOT guaranteed 612 ** that it will deliver to all these addresses however -- so 613 ** deliver should be called once for each address on the 614 ** list. 615 ** 616 ** Parameters: 617 ** e -- the envelope to deliver. 618 ** firstto -- head of the address list to deliver to. 619 ** 620 ** Returns: 621 ** zero -- successfully delivered. 622 ** else -- some failure, see ExitStat for more info. 623 ** 624 ** Side Effects: 625 ** The standard input is passed off to someone. 626 */ 627 628 int 629 deliver(e, firstto) 630 register ENVELOPE *e; 631 ADDRESS *firstto; 632 { 633 char *host; /* host being sent to */ 634 char *user; /* user being sent to */ 635 char **pvp; 636 register char **mvp; 637 register char *p; 638 register MAILER *m; /* mailer for this recipient */ 639 ADDRESS *ctladdr; 640 register MCI *mci; 641 register ADDRESS *to = firstto; 642 bool clever = FALSE; /* running user smtp to this mailer */ 643 ADDRESS *tochain = NULL; /* users chain in this mailer call */ 644 int rcode; /* response code */ 645 char *firstsig; /* signature of firstto */ 646 int pid = -1; 647 char *curhost; 648 time_t xstart; 649 int mpvect[2]; 650 int rpvect[2]; 651 char *pv[MAXPV+1]; 652 char tobuf[TOBUFSIZE]; /* text line of to people */ 653 char buf[MAXNAME + 1]; 654 char rpathbuf[MAXNAME + 1]; /* translated return path */ 655 extern int checkcompat(); 656 657 errno = 0; 658 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 659 return (0); 660 661 #if NAMED_BIND 662 /* unless interactive, try twice, over a minute */ 663 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) 664 { 665 _res.retrans = 30; 666 _res.retry = 2; 667 } 668 #endif 669 670 m = to->q_mailer; 671 host = to->q_host; 672 CurEnv = e; /* just in case */ 673 e->e_statmsg = NULL; 674 SmtpError[0] = '\0'; 675 xstart = curtime(); 676 677 if (tTd(10, 1)) 678 printf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n", 679 e->e_id, m->m_name, host, to->q_user); 680 if (tTd(10, 100)) 681 printopenfds(FALSE); 682 683 /* 684 ** Do initial argv setup. 685 ** Insert the mailer name. Notice that $x expansion is 686 ** NOT done on the mailer name. Then, if the mailer has 687 ** a picky -f flag, we insert it as appropriate. This 688 ** code does not check for 'pv' overflow; this places a 689 ** manifest lower limit of 4 for MAXPV. 690 ** The from address rewrite is expected to make 691 ** the address relative to the other end. 692 */ 693 694 /* rewrite from address, using rewriting rules */ 695 rcode = EX_OK; 696 if (bitnset(M_UDBENVELOPE, e->e_from.q_mailer->m_flags)) 697 p = e->e_sender; 698 else 699 p = e->e_from.q_paddr; 700 (void) strcpy(rpathbuf, remotename(p, m, 701 RF_SENDERADDR|RF_CANONICAL, 702 &rcode, e)); 703 define('g', rpathbuf, e); /* translated return path */ 704 define('h', host, e); /* to host */ 705 Errors = 0; 706 pvp = pv; 707 *pvp++ = m->m_argv[0]; 708 709 /* insert -f or -r flag as appropriate */ 710 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 711 { 712 if (bitnset(M_FOPT, m->m_flags)) 713 *pvp++ = "-f"; 714 else 715 *pvp++ = "-r"; 716 *pvp++ = newstr(rpathbuf); 717 } 718 719 /* 720 ** Append the other fixed parts of the argv. These run 721 ** up to the first entry containing "$u". There can only 722 ** be one of these, and there are only a few more slots 723 ** in the pv after it. 724 */ 725 726 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 727 { 728 /* can't use strchr here because of sign extension problems */ 729 while (*p != '\0') 730 { 731 if ((*p++ & 0377) == MACROEXPAND) 732 { 733 if (*p == 'u') 734 break; 735 } 736 } 737 738 if (*p != '\0') 739 break; 740 741 /* this entry is safe -- go ahead and process it */ 742 expand(*mvp, buf, sizeof buf, e); 743 *pvp++ = newstr(buf); 744 if (pvp >= &pv[MAXPV - 3]) 745 { 746 syserr("554 Too many parameters to %s before $u", pv[0]); 747 return (-1); 748 } 749 } 750 751 /* 752 ** If we have no substitution for the user name in the argument 753 ** list, we know that we must supply the names otherwise -- and 754 ** SMTP is the answer!! 755 */ 756 757 if (*mvp == NULL) 758 { 759 /* running SMTP */ 760 # ifdef SMTP 761 clever = TRUE; 762 *pvp = NULL; 763 # else /* SMTP */ 764 /* oops! we don't implement SMTP */ 765 syserr("554 SMTP style mailer not implemented"); 766 return (EX_SOFTWARE); 767 # endif /* SMTP */ 768 } 769 770 /* 771 ** At this point *mvp points to the argument with $u. We 772 ** run through our address list and append all the addresses 773 ** we can. If we run out of space, do not fret! We can 774 ** always send another copy later. 775 */ 776 777 tobuf[0] = '\0'; 778 e->e_to = tobuf; 779 ctladdr = NULL; 780 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 781 for (; to != NULL; to = to->q_next) 782 { 783 /* avoid sending multiple recipients to dumb mailers */ 784 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 785 break; 786 787 /* if already sent or not for this host, don't send */ 788 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 789 to->q_mailer != firstto->q_mailer || 790 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 791 continue; 792 793 /* avoid overflowing tobuf */ 794 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 795 break; 796 797 if (tTd(10, 1)) 798 { 799 printf("\nsend to "); 800 printaddr(to, FALSE); 801 } 802 803 /* compute effective uid/gid when sending */ 804 if (bitnset(M_RUNASRCPT, to->q_mailer->m_flags)) 805 ctladdr = getctladdr(to); 806 807 if (tTd(10, 2)) 808 { 809 printf("ctladdr="); 810 printaddr(ctladdr, FALSE); 811 } 812 813 user = to->q_user; 814 e->e_to = to->q_paddr; 815 if (tTd(10, 5)) 816 { 817 printf("deliver: QDONTSEND "); 818 printaddr(to, FALSE); 819 } 820 to->q_flags |= QDONTSEND; 821 822 /* 823 ** Check to see that these people are allowed to 824 ** talk to each other. 825 */ 826 827 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 828 { 829 e->e_flags |= EF_NO_BODY_RETN; 830 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 831 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, xstart, e); 832 continue; 833 } 834 #if NAMED_BIND 835 h_errno = 0; 836 #endif 837 rcode = checkcompat(to, e); 838 if (rcode != EX_OK) 839 { 840 markfailure(e, to, NULL, rcode); 841 giveresponse(rcode, m, NULL, ctladdr, xstart, e); 842 continue; 843 } 844 845 /* 846 ** Strip quote bits from names if the mailer is dumb 847 ** about them. 848 */ 849 850 if (bitnset(M_STRIPQ, m->m_flags)) 851 { 852 stripquotes(user); 853 stripquotes(host); 854 } 855 856 /* hack attack -- delivermail compatibility */ 857 if (m == ProgMailer && *user == '|') 858 user++; 859 860 /* 861 ** If an error message has already been given, don't 862 ** bother to send to this address. 863 ** 864 ** >>>>>>>>>> This clause assumes that the local mailer 865 ** >> NOTE >> cannot do any further aliasing; that 866 ** >>>>>>>>>> function is subsumed by sendmail. 867 */ 868 869 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 870 continue; 871 872 /* save statistics.... */ 873 markstats(e, to); 874 875 /* 876 ** See if this user name is "special". 877 ** If the user name has a slash in it, assume that this 878 ** is a file -- send it off without further ado. Note 879 ** that this type of addresses is not processed along 880 ** with the others, so we fudge on the To person. 881 */ 882 883 if (m == FileMailer) 884 { 885 rcode = mailfile(user, ctladdr, e); 886 giveresponse(rcode, m, NULL, ctladdr, xstart, e); 887 e->e_nsent++; 888 if (rcode == EX_OK) 889 { 890 to->q_flags |= QSENT; 891 if (bitnset(M_LOCALMAILER, m->m_flags) && 892 (e->e_receiptto != NULL || 893 bitset(QPINGONSUCCESS, to->q_flags))) 894 { 895 to->q_flags |= QREPORT; 896 to->q_status = "2.1.5"; 897 fprintf(e->e_xfp, "%s... Successfully delivered\n", 898 to->q_paddr); 899 } 900 } 901 to->q_statdate = curtime(); 902 continue; 903 } 904 905 /* 906 ** Address is verified -- add this user to mailer 907 ** argv, and add it to the print list of recipients. 908 */ 909 910 /* link together the chain of recipients */ 911 to->q_tchain = tochain; 912 tochain = to; 913 914 /* create list of users for error messages */ 915 (void) strcat(tobuf, ","); 916 (void) strcat(tobuf, to->q_paddr); 917 define('u', user, e); /* to user */ 918 p = to->q_home; 919 if (p == NULL && ctladdr != NULL) 920 p = ctladdr->q_home; 921 define('z', p, e); /* user's home */ 922 923 /* 924 ** Expand out this user into argument list. 925 */ 926 927 if (!clever) 928 { 929 expand(*mvp, buf, sizeof buf, e); 930 *pvp++ = newstr(buf); 931 if (pvp >= &pv[MAXPV - 2]) 932 { 933 /* allow some space for trailing parms */ 934 break; 935 } 936 } 937 } 938 939 /* see if any addresses still exist */ 940 if (tobuf[0] == '\0') 941 { 942 define('g', (char *) NULL, e); 943 return (0); 944 } 945 946 /* print out messages as full list */ 947 e->e_to = tobuf + 1; 948 949 /* 950 ** Fill out any parameters after the $u parameter. 951 */ 952 953 while (!clever && *++mvp != NULL) 954 { 955 expand(*mvp, buf, sizeof buf, e); 956 *pvp++ = newstr(buf); 957 if (pvp >= &pv[MAXPV]) 958 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 959 } 960 *pvp++ = NULL; 961 962 /* 963 ** Call the mailer. 964 ** The argument vector gets built, pipes 965 ** are created as necessary, and we fork & exec as 966 ** appropriate. 967 ** If we are running SMTP, we just need to clean up. 968 */ 969 970 /*XXX this seems a bit wierd */ 971 if (ctladdr == NULL && m != ProgMailer && 972 bitset(QGOODUID, e->e_from.q_flags)) 973 ctladdr = &e->e_from; 974 975 #if NAMED_BIND 976 if (ConfigLevel < 2) 977 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 978 #endif 979 980 if (tTd(11, 1)) 981 { 982 printf("openmailer:"); 983 printav(pv); 984 } 985 errno = 0; 986 #if NAMED_BIND 987 h_errno = 0; 988 #endif 989 990 CurHostName = NULL; 991 992 /* 993 ** Deal with the special case of mail handled through an IPC 994 ** connection. 995 ** In this case we don't actually fork. We must be 996 ** running SMTP for this to work. We will return a 997 ** zero pid to indicate that we are running IPC. 998 ** We also handle a debug version that just talks to stdin/out. 999 */ 1000 1001 curhost = NULL; 1002 SmtpPhase = NULL; 1003 mci = NULL; 1004 1005 #ifdef XDEBUG 1006 { 1007 char wbuf[MAXLINE]; 1008 1009 /* make absolutely certain 0, 1, and 2 are in use */ 1010 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 1011 checkfd012(wbuf); 1012 } 1013 #endif 1014 1015 /* check for 8-bit available */ 1016 if (bitset(EF_HAS8BIT, e->e_flags) && 1017 bitnset(M_7BITS, m->m_flags) && 1018 !bitset(MM_MIME8BIT, MimeMode)) 1019 { 1020 usrerr("554 Cannot send 8-bit data to 7-bit destination"); 1021 rcode = EX_DATAERR; 1022 goto give_up; 1023 } 1024 1025 /* check for Local Person Communication -- not for mortals!!! */ 1026 if (strcmp(m->m_mailer, "[LPC]") == 0) 1027 { 1028 mci = (MCI *) xalloc(sizeof *mci); 1029 bzero((char *) mci, sizeof *mci); 1030 mci->mci_in = stdin; 1031 mci->mci_out = stdout; 1032 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1033 mci->mci_mailer = m; 1034 } 1035 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 1036 strcmp(m->m_mailer, "[TCP]") == 0) 1037 { 1038 #ifdef DAEMON 1039 register int i; 1040 register u_short port = 0; 1041 1042 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 1043 { 1044 syserr("null host name for %s mailer", m->m_mailer); 1045 rcode = EX_CONFIG; 1046 goto give_up; 1047 } 1048 1049 CurHostName = pv[1]; 1050 curhost = hostsignature(m, pv[1], e); 1051 1052 if (curhost == NULL || curhost[0] == '\0') 1053 { 1054 syserr("null host signature for %s", pv[1]); 1055 rcode = EX_CONFIG; 1056 goto give_up; 1057 } 1058 1059 if (!clever) 1060 { 1061 syserr("554 non-clever IPC"); 1062 rcode = EX_CONFIG; 1063 goto give_up; 1064 } 1065 if (pv[2] != NULL) 1066 port = atoi(pv[2]); 1067 tryhost: 1068 while (*curhost != '\0') 1069 { 1070 register char *p; 1071 static char hostbuf[MAXNAME + 1]; 1072 1073 /* pull the next host from the signature */ 1074 p = strchr(curhost, ':'); 1075 if (p == NULL) 1076 p = &curhost[strlen(curhost)]; 1077 if (p == curhost) 1078 { 1079 syserr("deliver: null host name in signature"); 1080 curhost++; 1081 continue; 1082 } 1083 strncpy(hostbuf, curhost, p - curhost); 1084 hostbuf[p - curhost] = '\0'; 1085 if (*p != '\0') 1086 p++; 1087 curhost = p; 1088 1089 /* see if we already know that this host is fried */ 1090 CurHostName = hostbuf; 1091 mci = mci_get(hostbuf, m); 1092 if (mci->mci_state != MCIS_CLOSED) 1093 { 1094 if (tTd(11, 1)) 1095 { 1096 printf("openmailer: "); 1097 mci_dump(mci, FALSE); 1098 } 1099 CurHostName = mci->mci_host; 1100 message("Using cached connection to %s via %s...", 1101 hostbuf, m->m_name); 1102 break; 1103 } 1104 mci->mci_mailer = m; 1105 if (mci->mci_exitstat != EX_OK) 1106 continue; 1107 1108 /* try the connection */ 1109 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1110 message("Connecting to %s via %s...", 1111 hostbuf, m->m_name); 1112 i = makeconnection(hostbuf, port, mci, 1113 bitnset(M_SECURE_PORT, m->m_flags)); 1114 mci->mci_exitstat = i; 1115 mci->mci_errno = errno; 1116 #if NAMED_BIND 1117 mci->mci_herrno = h_errno; 1118 #endif 1119 if (i == EX_OK) 1120 { 1121 mci->mci_state = MCIS_OPENING; 1122 mci_cache(mci); 1123 if (TrafficLogFile != NULL) 1124 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1125 getpid(), hostbuf); 1126 break; 1127 } 1128 else if (tTd(11, 1)) 1129 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1130 i, errno); 1131 1132 /* enter status of this host */ 1133 setstat(i); 1134 1135 /* should print some message here for -v mode */ 1136 } 1137 if (mci == NULL) 1138 { 1139 syserr("deliver: no host name"); 1140 rcode = EX_OSERR; 1141 goto give_up; 1142 } 1143 mci->mci_pid = 0; 1144 #else /* no DAEMON */ 1145 syserr("554 openmailer: no IPC"); 1146 if (tTd(11, 1)) 1147 printf("openmailer: NULL\n"); 1148 rcode = EX_UNAVAILABLE; 1149 goto give_up; 1150 #endif /* DAEMON */ 1151 } 1152 else 1153 { 1154 /* flush any expired connections */ 1155 (void) mci_scan(NULL); 1156 1157 /* announce the connection to verbose listeners */ 1158 if (host == NULL || host[0] == '\0') 1159 message("Connecting to %s...", m->m_name); 1160 else 1161 message("Connecting to %s via %s...", host, m->m_name); 1162 if (TrafficLogFile != NULL) 1163 { 1164 char **av; 1165 1166 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1167 for (av = pv; *av != NULL; av++) 1168 fprintf(TrafficLogFile, " %s", *av); 1169 fprintf(TrafficLogFile, "\n"); 1170 } 1171 1172 /* create a pipe to shove the mail through */ 1173 if (pipe(mpvect) < 0) 1174 { 1175 syserr("%s... openmailer(%s): pipe (to mailer)", 1176 e->e_to, m->m_name); 1177 if (tTd(11, 1)) 1178 printf("openmailer: NULL\n"); 1179 rcode = EX_OSERR; 1180 goto give_up; 1181 } 1182 1183 /* if this mailer speaks smtp, create a return pipe */ 1184 if (clever && pipe(rpvect) < 0) 1185 { 1186 syserr("%s... openmailer(%s): pipe (from mailer)", 1187 e->e_to, m->m_name); 1188 (void) close(mpvect[0]); 1189 (void) close(mpvect[1]); 1190 if (tTd(11, 1)) 1191 printf("openmailer: NULL\n"); 1192 rcode = EX_OSERR; 1193 goto give_up; 1194 } 1195 1196 /* 1197 ** Actually fork the mailer process. 1198 ** DOFORK is clever about retrying. 1199 ** 1200 ** Dispose of SIGCHLD signal catchers that may be laying 1201 ** around so that endmail will get it. 1202 */ 1203 1204 if (e->e_xfp != NULL) 1205 (void) fflush(e->e_xfp); /* for debugging */ 1206 (void) fflush(stdout); 1207 # ifdef SIGCHLD 1208 (void) setsignal(SIGCHLD, SIG_DFL); 1209 # endif /* SIGCHLD */ 1210 DOFORK(FORK); 1211 /* pid is set by DOFORK */ 1212 if (pid < 0) 1213 { 1214 /* failure */ 1215 syserr("%s... openmailer(%s): cannot fork", 1216 e->e_to, m->m_name); 1217 (void) close(mpvect[0]); 1218 (void) close(mpvect[1]); 1219 if (clever) 1220 { 1221 (void) close(rpvect[0]); 1222 (void) close(rpvect[1]); 1223 } 1224 if (tTd(11, 1)) 1225 printf("openmailer: NULL\n"); 1226 rcode = EX_OSERR; 1227 goto give_up; 1228 } 1229 else if (pid == 0) 1230 { 1231 int i; 1232 int saveerrno; 1233 char **ep; 1234 char *env[MAXUSERENVIRON]; 1235 extern char **environ; 1236 extern int DtableSize; 1237 1238 if (e->e_lockfp != NULL) 1239 (void) close(fileno(e->e_lockfp)); 1240 1241 /* child -- set up input & exec mailer */ 1242 (void) setsignal(SIGINT, SIG_IGN); 1243 (void) setsignal(SIGHUP, SIG_IGN); 1244 (void) setsignal(SIGTERM, SIG_DFL); 1245 1246 /* tweak niceness */ 1247 if (m->m_nice != 0) 1248 nice(m->m_nice); 1249 1250 /* reset user and group */ 1251 if (bitnset(M_SPECIFIC_UID, m->m_flags)) 1252 { 1253 (void) setgid(m->m_gid); 1254 (void) setuid(m->m_uid); 1255 } 1256 else if (ctladdr != NULL && ctladdr->q_uid != 0) 1257 { 1258 (void) initgroups(ctladdr->q_ruser? 1259 ctladdr->q_ruser: ctladdr->q_user, 1260 ctladdr->q_gid); 1261 (void) setgid(ctladdr->q_gid); 1262 (void) setuid(ctladdr->q_uid); 1263 } 1264 else 1265 { 1266 (void) initgroups(DefUser, DefGid); 1267 if (m->m_gid == 0) 1268 (void) setgid(DefGid); 1269 else 1270 (void) setgid(m->m_gid); 1271 if (m->m_uid == 0) 1272 (void) setuid(DefUid); 1273 else 1274 (void) setuid(m->m_uid); 1275 } 1276 1277 if (tTd(11, 2)) 1278 printf("openmailer: running as r/euid=%d/%d\n", 1279 getuid(), geteuid()); 1280 1281 /* move into some "safe" directory */ 1282 if (m->m_execdir != NULL) 1283 { 1284 char *p, *q; 1285 char buf[MAXLINE + 1]; 1286 1287 for (p = m->m_execdir; p != NULL; p = q) 1288 { 1289 q = strchr(p, ':'); 1290 if (q != NULL) 1291 *q = '\0'; 1292 expand(p, buf, sizeof buf, e); 1293 if (q != NULL) 1294 *q++ = ':'; 1295 if (tTd(11, 20)) 1296 printf("openmailer: trydir %s\n", 1297 buf); 1298 if (buf[0] != '\0' && chdir(buf) >= 0) 1299 break; 1300 } 1301 } 1302 1303 /* arrange to filter std & diag output of command */ 1304 if (clever) 1305 { 1306 (void) close(rpvect[0]); 1307 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1308 { 1309 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1310 e->e_to, m->m_name, rpvect[1]); 1311 _exit(EX_OSERR); 1312 } 1313 (void) close(rpvect[1]); 1314 } 1315 else if (OpMode == MD_SMTP || OpMode == MD_DAEMON || 1316 HoldErrs || DisConnected) 1317 { 1318 /* put mailer output in transcript */ 1319 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1320 { 1321 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1322 e->e_to, m->m_name, 1323 fileno(e->e_xfp)); 1324 _exit(EX_OSERR); 1325 } 1326 } 1327 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1328 { 1329 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1330 e->e_to, m->m_name); 1331 _exit(EX_OSERR); 1332 } 1333 1334 /* arrange to get standard input */ 1335 (void) close(mpvect[1]); 1336 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1337 { 1338 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1339 e->e_to, m->m_name, mpvect[0]); 1340 _exit(EX_OSERR); 1341 } 1342 (void) close(mpvect[0]); 1343 1344 /* arrange for all the files to be closed */ 1345 for (i = 3; i < DtableSize; i++) 1346 { 1347 register int j; 1348 1349 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1350 (void) fcntl(i, F_SETFD, j | 1); 1351 } 1352 1353 /* 1354 ** Set up the mailer environment 1355 ** _FORCE_MAIL_LOCAL_ is DG-UX equiv of -d flag. 1356 ** TZ is timezone information. 1357 ** SYSTYPE is Apollo software sys type (required). 1358 ** ISP is Apollo hardware system type (required). 1359 */ 1360 1361 i = 0; 1362 env[i++] = "AGENT=sendmail"; 1363 env[i++] = "_FORCE_MAIL_LOCAL_=yes"; 1364 for (ep = environ; *ep != NULL; ep++) 1365 { 1366 if (strncmp(*ep, "TZ=", 3) == 0 || 1367 strncmp(*ep, "ISP=", 4) == 0 || 1368 strncmp(*ep, "SYSTYPE=", 8) == 0) 1369 env[i++] = *ep; 1370 } 1371 env[i] = NULL; 1372 1373 /* run disconnected from terminal */ 1374 (void) setsid(); 1375 1376 /* try to execute the mailer */ 1377 execve(m->m_mailer, (ARGV_T) pv, (ARGV_T) env); 1378 saveerrno = errno; 1379 syserr("Cannot exec %s", m->m_mailer); 1380 if (bitnset(M_LOCALMAILER, m->m_flags) || 1381 transienterror(saveerrno)) 1382 _exit(EX_OSERR); 1383 _exit(EX_UNAVAILABLE); 1384 } 1385 1386 /* 1387 ** Set up return value. 1388 */ 1389 1390 mci = (MCI *) xalloc(sizeof *mci); 1391 bzero((char *) mci, sizeof *mci); 1392 mci->mci_mailer = m; 1393 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1394 mci->mci_pid = pid; 1395 (void) close(mpvect[0]); 1396 mci->mci_out = fdopen(mpvect[1], "w"); 1397 if (mci->mci_out == NULL) 1398 { 1399 syserr("deliver: cannot create mailer output channel, fd=%d", 1400 mpvect[1]); 1401 (void) close(mpvect[1]); 1402 if (clever) 1403 { 1404 (void) close(rpvect[0]); 1405 (void) close(rpvect[1]); 1406 } 1407 rcode = EX_OSERR; 1408 goto give_up; 1409 } 1410 if (clever) 1411 { 1412 (void) close(rpvect[1]); 1413 mci->mci_in = fdopen(rpvect[0], "r"); 1414 if (mci->mci_in == NULL) 1415 { 1416 syserr("deliver: cannot create mailer input channel, fd=%d", 1417 mpvect[1]); 1418 (void) close(rpvect[0]); 1419 fclose(mci->mci_out); 1420 mci->mci_out = NULL; 1421 rcode = EX_OSERR; 1422 goto give_up; 1423 } 1424 } 1425 else 1426 { 1427 mci->mci_flags |= MCIF_TEMP; 1428 mci->mci_in = NULL; 1429 } 1430 } 1431 1432 /* 1433 ** If we are in SMTP opening state, send initial protocol. 1434 */ 1435 1436 if (clever && mci->mci_state != MCIS_CLOSED) 1437 { 1438 smtpinit(m, mci, e); 1439 } 1440 1441 if (bitset(EF_HAS8BIT, e->e_flags) && bitnset(M_7BITS, m->m_flags)) 1442 mci->mci_flags |= MCIF_CVT8TO7; 1443 else 1444 mci->mci_flags &= ~MCIF_CVT8TO7; 1445 1446 if (tTd(11, 1)) 1447 { 1448 printf("openmailer: "); 1449 mci_dump(mci, FALSE); 1450 } 1451 1452 if (mci->mci_state != MCIS_OPEN) 1453 { 1454 /* couldn't open the mailer */ 1455 rcode = mci->mci_exitstat; 1456 errno = mci->mci_errno; 1457 #if NAMED_BIND 1458 h_errno = mci->mci_herrno; 1459 #endif 1460 if (rcode == EX_OK) 1461 { 1462 /* shouldn't happen */ 1463 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1464 rcode, mci->mci_state, firstsig); 1465 rcode = EX_SOFTWARE; 1466 } 1467 else if (curhost != NULL && *curhost != '\0') 1468 { 1469 /* try next MX site */ 1470 goto tryhost; 1471 } 1472 } 1473 else if (!clever) 1474 { 1475 /* 1476 ** Format and send message. 1477 */ 1478 1479 putfromline(mci, e); 1480 (*e->e_puthdr)(mci, e->e_header, e); 1481 (*e->e_putbody)(mci, e, NULL); 1482 1483 /* get the exit status */ 1484 rcode = endmailer(mci, e, pv); 1485 } 1486 else 1487 #ifdef SMTP 1488 { 1489 /* 1490 ** Send the MAIL FROM: protocol 1491 */ 1492 1493 rcode = smtpmailfrom(m, mci, e); 1494 if (rcode == EX_OK) 1495 { 1496 register char *t = tobuf; 1497 register int i; 1498 1499 /* send the recipient list */ 1500 tobuf[0] = '\0'; 1501 for (to = tochain; to != NULL; to = to->q_tchain) 1502 { 1503 e->e_to = to->q_paddr; 1504 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1505 { 1506 markfailure(e, to, mci, i); 1507 giveresponse(i, m, mci, ctladdr, xstart, e); 1508 } 1509 else 1510 { 1511 *t++ = ','; 1512 for (p = to->q_paddr; *p; *t++ = *p++) 1513 continue; 1514 *t = '\0'; 1515 } 1516 } 1517 1518 /* now send the data */ 1519 if (tobuf[0] == '\0') 1520 { 1521 rcode = EX_OK; 1522 e->e_to = NULL; 1523 if (bitset(MCIF_CACHED, mci->mci_flags)) 1524 smtprset(m, mci, e); 1525 } 1526 else 1527 { 1528 e->e_to = tobuf + 1; 1529 rcode = smtpdata(m, mci, e); 1530 } 1531 1532 /* now close the connection */ 1533 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1534 smtpquit(m, mci, e); 1535 } 1536 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1537 { 1538 /* try next MX site */ 1539 goto tryhost; 1540 } 1541 } 1542 #else /* not SMTP */ 1543 { 1544 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1545 rcode = EX_CONFIG; 1546 goto give_up; 1547 } 1548 #endif /* SMTP */ 1549 #if NAMED_BIND 1550 if (ConfigLevel < 2) 1551 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1552 #endif 1553 1554 /* arrange a return receipt if requested */ 1555 if (rcode == EX_OK && e->e_receiptto != NULL && 1556 bitnset(M_LOCALMAILER, m->m_flags)) 1557 { 1558 e->e_flags |= EF_SENDRECEIPT; 1559 /* do we want to send back more info? */ 1560 } 1561 1562 /* 1563 ** Do final status disposal. 1564 ** We check for something in tobuf for the SMTP case. 1565 ** If we got a temporary failure, arrange to queue the 1566 ** addressees. 1567 */ 1568 1569 give_up: 1570 if (tobuf[0] != '\0') 1571 giveresponse(rcode, m, mci, ctladdr, xstart, e); 1572 for (to = tochain; to != NULL; to = to->q_tchain) 1573 { 1574 if (rcode != EX_OK) 1575 markfailure(e, to, mci, rcode); 1576 else if (!bitset(QBADADDR|QQUEUEUP, to->q_flags)) 1577 { 1578 to->q_flags |= QSENT; 1579 to->q_statdate = curtime(); 1580 e->e_nsent++; 1581 if (bitnset(M_LOCALMAILER, m->m_flags) && 1582 (e->e_receiptto != NULL || 1583 bitset(QPINGONSUCCESS, to->q_flags))) 1584 { 1585 to->q_flags |= QREPORT; 1586 to->q_status = "2.1.5"; 1587 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1588 to->q_paddr); 1589 } 1590 else if (bitset(QPINGONSUCCESS, to->q_flags) && 1591 bitset(QPRIMARY, to->q_flags) && 1592 !bitset(MCIF_DSN, mci->mci_flags)) 1593 { 1594 to->q_flags |= QRELAYED; 1595 fprintf(e->e_xfp, "%s... relayed; expect no further notifications\n", 1596 to->q_paddr); 1597 } 1598 } 1599 } 1600 1601 /* 1602 ** Restore state and return. 1603 */ 1604 1605 #ifdef XDEBUG 1606 { 1607 char wbuf[MAXLINE]; 1608 1609 /* make absolutely certain 0, 1, and 2 are in use */ 1610 sprintf(wbuf, "%s... end of deliver(%s)", 1611 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1612 m->m_name); 1613 checkfd012(wbuf); 1614 } 1615 #endif 1616 1617 errno = 0; 1618 define('g', (char *) NULL, e); 1619 return (rcode); 1620 } 1621 /* 1622 ** MARKFAILURE -- mark a failure on a specific address. 1623 ** 1624 ** Parameters: 1625 ** e -- the envelope we are sending. 1626 ** q -- the address to mark. 1627 ** mci -- mailer connection information. 1628 ** rcode -- the code signifying the particular failure. 1629 ** 1630 ** Returns: 1631 ** none. 1632 ** 1633 ** Side Effects: 1634 ** marks the address (and possibly the envelope) with the 1635 ** failure so that an error will be returned or 1636 ** the message will be queued, as appropriate. 1637 */ 1638 1639 markfailure(e, q, mci, rcode) 1640 register ENVELOPE *e; 1641 register ADDRESS *q; 1642 register MCI *mci; 1643 int rcode; 1644 { 1645 char *stat = NULL; 1646 1647 switch (rcode) 1648 { 1649 case EX_OK: 1650 break; 1651 1652 case EX_TEMPFAIL: 1653 case EX_IOERR: 1654 case EX_OSERR: 1655 q->q_flags |= QQUEUEUP; 1656 break; 1657 1658 default: 1659 q->q_flags |= QBADADDR; 1660 break; 1661 } 1662 1663 if (q->q_status == NULL && mci != NULL) 1664 q->q_status = mci->mci_status; 1665 switch (rcode) 1666 { 1667 case EX_USAGE: 1668 stat = "5.5.4"; 1669 break; 1670 1671 case EX_DATAERR: 1672 stat = "5.5.2"; 1673 break; 1674 1675 case EX_NOUSER: 1676 case EX_NOHOST: 1677 stat = "5.1.1"; 1678 break; 1679 1680 case EX_NOINPUT: 1681 case EX_CANTCREAT: 1682 case EX_NOPERM: 1683 stat = "5.3.0"; 1684 break; 1685 1686 case EX_UNAVAILABLE: 1687 case EX_SOFTWARE: 1688 case EX_OSFILE: 1689 case EX_PROTOCOL: 1690 case EX_CONFIG: 1691 stat = "5.5.0"; 1692 break; 1693 1694 case EX_OSERR: 1695 case EX_IOERR: 1696 stat = "4.5.0"; 1697 break; 1698 1699 case EX_TEMPFAIL: 1700 stat = "4.2.0"; 1701 break; 1702 } 1703 if (stat != NULL) 1704 q->q_status = stat; 1705 1706 q->q_statdate = curtime(); 1707 if (CurHostName != NULL && CurHostName[0] != '\0') 1708 q->q_statmta = newstr(CurHostName); 1709 if (rcode != EX_OK && q->q_rstatus == NULL) 1710 { 1711 char buf[30]; 1712 1713 (void) sprintf(buf, "%d", rcode); 1714 q->q_rstatus = newstr(buf); 1715 } 1716 } 1717 /* 1718 ** ENDMAILER -- Wait for mailer to terminate. 1719 ** 1720 ** We should never get fatal errors (e.g., segmentation 1721 ** violation), so we report those specially. For other 1722 ** errors, we choose a status message (into statmsg), 1723 ** and if it represents an error, we print it. 1724 ** 1725 ** Parameters: 1726 ** pid -- pid of mailer. 1727 ** e -- the current envelope. 1728 ** pv -- the parameter vector that invoked the mailer 1729 ** (for error messages). 1730 ** 1731 ** Returns: 1732 ** exit code of mailer. 1733 ** 1734 ** Side Effects: 1735 ** none. 1736 */ 1737 1738 endmailer(mci, e, pv) 1739 register MCI *mci; 1740 register ENVELOPE *e; 1741 char **pv; 1742 { 1743 int st; 1744 1745 /* close any connections */ 1746 if (mci->mci_in != NULL) 1747 (void) xfclose(mci->mci_in, mci->mci_mailer->m_name, "mci_in"); 1748 if (mci->mci_out != NULL) 1749 (void) xfclose(mci->mci_out, mci->mci_mailer->m_name, "mci_out"); 1750 mci->mci_in = mci->mci_out = NULL; 1751 mci->mci_state = MCIS_CLOSED; 1752 1753 /* in the IPC case there is nothing to wait for */ 1754 if (mci->mci_pid == 0) 1755 return (EX_OK); 1756 1757 /* wait for the mailer process to die and collect status */ 1758 st = waitfor(mci->mci_pid); 1759 if (st == -1) 1760 { 1761 syserr("endmailer %s: wait", pv[0]); 1762 return (EX_SOFTWARE); 1763 } 1764 1765 if (WIFEXITED(st)) 1766 { 1767 /* normal death -- return status */ 1768 return (WEXITSTATUS(st)); 1769 } 1770 1771 /* it died a horrid death */ 1772 syserr("451 mailer %s died with signal %o", 1773 mci->mci_mailer->m_name, st); 1774 1775 /* log the arguments */ 1776 if (pv != NULL && e->e_xfp != NULL) 1777 { 1778 register char **av; 1779 1780 fprintf(e->e_xfp, "Arguments:"); 1781 for (av = pv; *av != NULL; av++) 1782 fprintf(e->e_xfp, " %s", *av); 1783 fprintf(e->e_xfp, "\n"); 1784 } 1785 1786 ExitStat = EX_TEMPFAIL; 1787 return (EX_TEMPFAIL); 1788 } 1789 /* 1790 ** GIVERESPONSE -- Interpret an error response from a mailer 1791 ** 1792 ** Parameters: 1793 ** stat -- the status code from the mailer (high byte 1794 ** only; core dumps must have been taken care of 1795 ** already). 1796 ** m -- the mailer info for this mailer. 1797 ** mci -- the mailer connection info -- can be NULL if the 1798 ** response is given before the connection is made. 1799 ** ctladdr -- the controlling address for the recipient 1800 ** address(es). 1801 ** xstart -- the transaction start time, for computing 1802 ** transaction delays. 1803 ** e -- the current envelope. 1804 ** 1805 ** Returns: 1806 ** none. 1807 ** 1808 ** Side Effects: 1809 ** Errors may be incremented. 1810 ** ExitStat may be set. 1811 */ 1812 1813 giveresponse(stat, m, mci, ctladdr, xstart, e) 1814 int stat; 1815 register MAILER *m; 1816 register MCI *mci; 1817 ADDRESS *ctladdr; 1818 time_t xstart; 1819 ENVELOPE *e; 1820 { 1821 register const char *statmsg; 1822 extern char *SysExMsg[]; 1823 register int i; 1824 extern int N_SysEx; 1825 char buf[MAXLINE]; 1826 1827 /* 1828 ** Compute status message from code. 1829 */ 1830 1831 i = stat - EX__BASE; 1832 if (stat == 0) 1833 { 1834 statmsg = "250 Sent"; 1835 if (e->e_statmsg != NULL) 1836 { 1837 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1838 statmsg = buf; 1839 } 1840 } 1841 else if (i < 0 || i > N_SysEx) 1842 { 1843 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1844 stat = EX_UNAVAILABLE; 1845 statmsg = buf; 1846 } 1847 else if (stat == EX_TEMPFAIL) 1848 { 1849 (void) strcpy(buf, SysExMsg[i] + 1); 1850 #if NAMED_BIND 1851 if (h_errno == TRY_AGAIN) 1852 statmsg = errstring(h_errno+E_DNSBASE); 1853 else 1854 #endif 1855 { 1856 if (errno != 0) 1857 statmsg = errstring(errno); 1858 else 1859 { 1860 #ifdef SMTP 1861 statmsg = SmtpError; 1862 #else /* SMTP */ 1863 statmsg = NULL; 1864 #endif /* SMTP */ 1865 } 1866 } 1867 if (statmsg != NULL && statmsg[0] != '\0') 1868 { 1869 (void) strcat(buf, ": "); 1870 (void) strcat(buf, statmsg); 1871 } 1872 statmsg = buf; 1873 } 1874 #if NAMED_BIND 1875 else if (stat == EX_NOHOST && h_errno != 0) 1876 { 1877 statmsg = errstring(h_errno + E_DNSBASE); 1878 (void) sprintf(buf, "%s (%s)", SysExMsg[i] + 1, statmsg); 1879 statmsg = buf; 1880 } 1881 #endif 1882 else 1883 { 1884 statmsg = SysExMsg[i]; 1885 if (*statmsg++ == ':') 1886 { 1887 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1888 statmsg = buf; 1889 } 1890 } 1891 1892 /* 1893 ** Print the message as appropriate 1894 */ 1895 1896 if (stat == EX_OK || stat == EX_TEMPFAIL) 1897 { 1898 extern char MsgBuf[]; 1899 1900 message("%s", &statmsg[4]); 1901 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1902 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1903 } 1904 else 1905 { 1906 char mbuf[8]; 1907 1908 Errors++; 1909 sprintf(mbuf, "%.3s %%s", statmsg); 1910 usrerr(mbuf, &statmsg[4]); 1911 } 1912 1913 /* 1914 ** Final cleanup. 1915 ** Log a record of the transaction. Compute the new 1916 ** ExitStat -- if we already had an error, stick with 1917 ** that. 1918 */ 1919 1920 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1921 logdelivery(m, mci, &statmsg[4], ctladdr, xstart, e); 1922 1923 if (tTd(11, 2)) 1924 printf("giveresponse: stat=%d, e->e_message=%s\n", 1925 stat, e->e_message == NULL ? "<NULL>" : e->e_message); 1926 1927 if (stat != EX_TEMPFAIL) 1928 setstat(stat); 1929 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1930 { 1931 if (e->e_message != NULL) 1932 free(e->e_message); 1933 e->e_message = newstr(&statmsg[4]); 1934 } 1935 errno = 0; 1936 #if NAMED_BIND 1937 h_errno = 0; 1938 #endif 1939 } 1940 /* 1941 ** LOGDELIVERY -- log the delivery in the system log 1942 ** 1943 ** Care is taken to avoid logging lines that are too long, because 1944 ** some versions of syslog have an unfortunate proclivity for core 1945 ** dumping. This is a hack, to be sure, that is at best empirical. 1946 ** 1947 ** Parameters: 1948 ** m -- the mailer info. Can be NULL for initial queue. 1949 ** mci -- the mailer connection info -- can be NULL if the 1950 ** log is occuring when no connection is active. 1951 ** stat -- the message to print for the status. 1952 ** ctladdr -- the controlling address for the to list. 1953 ** xstart -- the transaction start time, used for 1954 ** computing transaction delay. 1955 ** e -- the current envelope. 1956 ** 1957 ** Returns: 1958 ** none 1959 ** 1960 ** Side Effects: 1961 ** none 1962 */ 1963 1964 logdelivery(m, mci, stat, ctladdr, xstart, e) 1965 MAILER *m; 1966 register MCI *mci; 1967 char *stat; 1968 ADDRESS *ctladdr; 1969 time_t xstart; 1970 register ENVELOPE *e; 1971 { 1972 # ifdef LOG 1973 register char *bp; 1974 register char *p; 1975 int l; 1976 char buf[512]; 1977 1978 # if (SYSLOG_BUFSIZE) >= 256 1979 bp = buf; 1980 if (ctladdr != NULL) 1981 { 1982 strcpy(bp, ", ctladdr="); 1983 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 1984 bp += strlen(bp); 1985 if (bitset(QGOODUID, ctladdr->q_flags)) 1986 { 1987 (void) sprintf(bp, " (%d/%d)", 1988 ctladdr->q_uid, ctladdr->q_gid); 1989 bp += strlen(bp); 1990 } 1991 } 1992 1993 sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1994 bp += strlen(bp); 1995 1996 if (xstart != (time_t) 0) 1997 { 1998 sprintf(bp, ", xdelay=%s", pintvl(curtime() - xstart, TRUE)); 1999 bp += strlen(bp); 2000 } 2001 2002 if (m != NULL) 2003 { 2004 (void) strcpy(bp, ", mailer="); 2005 (void) strcat(bp, m->m_name); 2006 bp += strlen(bp); 2007 } 2008 2009 if (mci != NULL && mci->mci_host != NULL) 2010 { 2011 # ifdef DAEMON 2012 extern SOCKADDR CurHostAddr; 2013 # endif 2014 2015 (void) strcpy(bp, ", relay="); 2016 (void) strcat(bp, mci->mci_host); 2017 2018 # ifdef DAEMON 2019 (void) strcat(bp, " ["); 2020 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 2021 (void) strcat(bp, "]"); 2022 # endif 2023 } 2024 else if (strcmp(stat, "queued") != 0) 2025 { 2026 char *p = macvalue('h', e); 2027 2028 if (p != NULL && p[0] != '\0') 2029 { 2030 (void) strcpy(bp, ", relay="); 2031 (void) strcat(bp, p); 2032 } 2033 } 2034 bp += strlen(bp); 2035 2036 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 2037 #if (STATLEN) < 63 2038 # undef STATLEN 2039 # define STATLEN 63 2040 #endif 2041 #if (STATLEN) > 203 2042 # undef STATLEN 2043 # define STATLEN 203 2044 #endif 2045 2046 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 2047 { 2048 /* desperation move -- truncate data */ 2049 bp = buf + sizeof buf - ((STATLEN) + 17); 2050 strcpy(bp, "..."); 2051 bp += 3; 2052 } 2053 2054 (void) strcpy(bp, ", stat="); 2055 bp += strlen(bp); 2056 2057 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 2058 2059 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 2060 p = e->e_to; 2061 while (strlen(p) >= (SIZE_T) l) 2062 { 2063 register char *q = strchr(p + l, ','); 2064 2065 if (q == NULL) 2066 break; 2067 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 2068 e->e_id, ++q - p, p, buf); 2069 p = q; 2070 } 2071 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 2072 2073 # else /* we have a very short log buffer size */ 2074 2075 l = SYSLOG_BUFSIZE - 85; 2076 p = e->e_to; 2077 while (strlen(p) >= l) 2078 { 2079 register char *q = strchr(p + l, ','); 2080 2081 if (q == NULL) 2082 break; 2083 syslog(LOG_INFO, "%s: to=%.*s [more]", 2084 e->e_id, ++q - p, p); 2085 p = q; 2086 } 2087 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 2088 2089 if (ctladdr != NULL) 2090 { 2091 bp = buf; 2092 strcpy(buf, "ctladdr="); 2093 bp += strlen(buf); 2094 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 2095 bp += strlen(buf); 2096 if (bitset(QGOODUID, ctladdr->q_flags)) 2097 { 2098 (void) sprintf(bp, " (%d/%d)", 2099 ctladdr->q_uid, ctladdr->q_gid); 2100 bp += strlen(bp); 2101 } 2102 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 2103 } 2104 bp = buf; 2105 sprintf(bp, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 2106 bp += strlen(bp); 2107 if (xstart != (time_t) 0) 2108 { 2109 sprintf(bp, ", xdelay=%s", pintvl(curtime() - xstart, TRUE)); 2110 bp += strlen(bp); 2111 } 2112 2113 if (m != NULL) 2114 { 2115 sprintf(bp, ", mailer=%s", m->m_name); 2116 bp += strlen(bp); 2117 } 2118 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 2119 2120 buf[0] = '\0'; 2121 if (mci != NULL && mci->mci_host != NULL) 2122 { 2123 # ifdef DAEMON 2124 extern SOCKADDR CurHostAddr; 2125 # endif 2126 2127 sprintf(buf, "relay=%s", mci->mci_host); 2128 2129 # ifdef DAEMON 2130 (void) strcat(buf, " ["); 2131 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 2132 (void) strcat(buf, "]"); 2133 # endif 2134 } 2135 else if (strcmp(stat, "queued") != 0) 2136 { 2137 char *p = macvalue('h', e); 2138 2139 if (p != NULL && p[0] != '\0') 2140 sprintf(buf, "relay=%s", p); 2141 } 2142 if (buf[0] != '\0') 2143 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 2144 2145 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 2146 # endif /* short log buffer */ 2147 # endif /* LOG */ 2148 } 2149 /* 2150 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 2151 ** 2152 ** This can be made an arbitrary message separator by changing $l 2153 ** 2154 ** One of the ugliest hacks seen by human eyes is contained herein: 2155 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 2156 ** does a well-meaning programmer such as myself have to deal with 2157 ** this kind of antique garbage???? 2158 ** 2159 ** Parameters: 2160 ** mci -- the connection information. 2161 ** e -- the envelope. 2162 ** 2163 ** Returns: 2164 ** none 2165 ** 2166 ** Side Effects: 2167 ** outputs some text to fp. 2168 */ 2169 2170 putfromline(mci, e) 2171 register MCI *mci; 2172 ENVELOPE *e; 2173 { 2174 char *template = "\201l\n"; 2175 char buf[MAXLINE]; 2176 2177 if (bitnset(M_NHDR, mci->mci_mailer->m_flags)) 2178 return; 2179 2180 # ifdef UGLYUUCP 2181 if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags)) 2182 { 2183 char *bang; 2184 char xbuf[MAXLINE]; 2185 2186 expand("\201g", buf, sizeof buf, e); 2187 bang = strchr(buf, '!'); 2188 if (bang == NULL) 2189 { 2190 errno = 0; 2191 syserr("554 No ! in UUCP From address! (%s given)", buf); 2192 } 2193 else 2194 { 2195 *bang++ = '\0'; 2196 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 2197 template = xbuf; 2198 } 2199 } 2200 # endif /* UGLYUUCP */ 2201 expand(template, buf, sizeof buf, e); 2202 putxline(buf, mci, PXLF_NOTHINGSPECIAL); 2203 } 2204 /* 2205 ** PUTBODY -- put the body of a message. 2206 ** 2207 ** Parameters: 2208 ** mci -- the connection information. 2209 ** e -- the envelope to put out. 2210 ** separator -- if non-NULL, a message separator that must 2211 ** not be permitted in the resulting message. 2212 ** 2213 ** Returns: 2214 ** none. 2215 ** 2216 ** Side Effects: 2217 ** The message is written onto fp. 2218 */ 2219 2220 /* values for output state variable */ 2221 #define OS_HEAD 0 /* at beginning of line */ 2222 #define OS_CR 1 /* read a carriage return */ 2223 #define OS_INLINE 2 /* putting rest of line */ 2224 2225 putbody(mci, e, separator) 2226 register MCI *mci; 2227 register ENVELOPE *e; 2228 char *separator; 2229 { 2230 char buf[MAXLINE]; 2231 2232 /* 2233 ** Output the body of the message 2234 */ 2235 2236 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags)) 2237 { 2238 char *df = queuename(e, 'd'); 2239 2240 e->e_dfp = fopen(df, "r"); 2241 if (e->e_dfp == NULL) 2242 syserr("putbody: Cannot open %s for %s from %s", 2243 df, e->e_to, e->e_from.q_paddr); 2244 } 2245 if (e->e_dfp == NULL) 2246 { 2247 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2248 { 2249 putline("", mci); 2250 mci->mci_flags &= ~MCIF_INHEADER; 2251 } 2252 putline("<<< No Message Collected >>>", mci); 2253 goto endofmessage; 2254 } 2255 if (e->e_dfino == (ino_t) 0) 2256 { 2257 struct stat stbuf; 2258 2259 if (fstat(fileno(e->e_dfp), &stbuf) < 0) 2260 e->e_dfino = -1; 2261 else 2262 { 2263 e->e_dfdev = stbuf.st_dev; 2264 e->e_dfino = stbuf.st_ino; 2265 } 2266 } 2267 rewind(e->e_dfp); 2268 2269 if (bitset(MCIF_CVT8TO7, mci->mci_flags)) 2270 { 2271 char *boundaries[MAXMIMENESTING + 1]; 2272 2273 /* 2274 ** Do 8 to 7 bit MIME conversion. 2275 */ 2276 2277 /* make sure it looks like a MIME message */ 2278 if (hvalue("MIME-Version", e->e_header) == NULL) 2279 putline("MIME-Version: 1.0", mci); 2280 2281 if (hvalue("Content-Type", e->e_header) == NULL) 2282 { 2283 sprintf(buf, "Content-Type: text/plain; charset=%s", 2284 defcharset(e)); 2285 putline(buf, mci); 2286 } 2287 2288 /* now do the hard work */ 2289 boundaries[0] = NULL; 2290 mime8to7(mci, e->e_header, e, boundaries, M87F_OUTER); 2291 } 2292 else 2293 { 2294 int ostate; 2295 register char *bp; 2296 register char *pbp; 2297 register int c; 2298 int padc; 2299 char *buflim; 2300 int pos = 0; 2301 char peekbuf[10]; 2302 2303 /* we can pass it through unmodified */ 2304 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2305 { 2306 putline("", mci); 2307 mci->mci_flags &= ~MCIF_INHEADER; 2308 } 2309 2310 /* determine end of buffer; allow for short mailer lines */ 2311 buflim = &buf[sizeof buf - 1]; 2312 if (mci->mci_mailer->m_linelimit > 0 && 2313 mci->mci_mailer->m_linelimit < sizeof buf - 1) 2314 buflim = &buf[mci->mci_mailer->m_linelimit - 1]; 2315 2316 /* copy temp file to output with mapping */ 2317 ostate = OS_HEAD; 2318 bp = buf; 2319 pbp = peekbuf; 2320 while (!ferror(mci->mci_out)) 2321 { 2322 register char *xp; 2323 2324 if (pbp > peekbuf) 2325 c = *--pbp; 2326 else if ((c = fgetc(e->e_dfp)) == EOF) 2327 break; 2328 if (bitset(MCIF_7BIT, mci->mci_flags)) 2329 c &= 0x7f; 2330 switch (ostate) 2331 { 2332 case OS_HEAD: 2333 if (c != '\r' && c != '\n' && bp < buflim) 2334 { 2335 *bp++ = c; 2336 break; 2337 } 2338 2339 /* check beginning of line for special cases */ 2340 *bp = '\0'; 2341 pos = 0; 2342 padc = EOF; 2343 if (buf[0] == 'F' && 2344 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) && 2345 strncmp(buf, "From ", 5) == 0) 2346 { 2347 padc = '>'; 2348 } 2349 if (buf[0] == '-' && buf[1] == '-' && 2350 separator != NULL) 2351 { 2352 /* possible separator */ 2353 int sl = strlen(separator); 2354 2355 if (strncmp(&buf[2], separator, sl) == 0) 2356 padc = ' '; 2357 } 2358 if (buf[0] == '.' && 2359 bitnset(M_XDOT, mci->mci_mailer->m_flags)) 2360 { 2361 padc = '.'; 2362 } 2363 2364 /* now copy out saved line */ 2365 if (TrafficLogFile != NULL) 2366 { 2367 fprintf(TrafficLogFile, "%05d >>> ", getpid()); 2368 if (padc != EOF) 2369 fputc(padc, TrafficLogFile); 2370 for (xp = buf; xp < bp; xp++) 2371 fputc(*xp, TrafficLogFile); 2372 if (c == '\n') 2373 fputs(mci->mci_mailer->m_eol, 2374 TrafficLogFile); 2375 } 2376 if (padc != EOF) 2377 { 2378 fputc(padc, mci->mci_out); 2379 pos++; 2380 } 2381 for (xp = buf; xp < bp; xp++) 2382 fputc(*xp, mci->mci_out); 2383 if (c == '\n') 2384 { 2385 fputs(mci->mci_mailer->m_eol, 2386 mci->mci_out); 2387 pos = 0; 2388 } 2389 else 2390 { 2391 pos += bp - buf; 2392 if (c != '\r') 2393 *pbp++ = c; 2394 } 2395 bp = buf; 2396 2397 /* determine next state */ 2398 if (c == '\n') 2399 ostate = OS_HEAD; 2400 else if (c == '\r') 2401 ostate = OS_CR; 2402 else 2403 ostate = OS_INLINE; 2404 continue; 2405 2406 case OS_CR: 2407 if (c == '\n') 2408 { 2409 /* got CRLF */ 2410 fputs(mci->mci_mailer->m_eol, mci->mci_out); 2411 if (TrafficLogFile != NULL) 2412 { 2413 fputs(mci->mci_mailer->m_eol, 2414 TrafficLogFile); 2415 } 2416 ostate = OS_HEAD; 2417 continue; 2418 } 2419 2420 /* had a naked carriage return */ 2421 *pbp++ = c; 2422 c = '\r'; 2423 goto putch; 2424 2425 case OS_INLINE: 2426 if (c == '\r') 2427 { 2428 ostate = OS_CR; 2429 continue; 2430 } 2431 putch: 2432 if (mci->mci_mailer->m_linelimit > 0 && 2433 pos > mci->mci_mailer->m_linelimit && 2434 c != '\n') 2435 { 2436 putc('!', mci->mci_out); 2437 fputs(mci->mci_mailer->m_eol, mci->mci_out); 2438 if (TrafficLogFile != NULL) 2439 { 2440 fprintf(TrafficLogFile, "!%s", 2441 mci->mci_mailer->m_eol); 2442 } 2443 ostate = OS_HEAD; 2444 *pbp++ = c; 2445 continue; 2446 } 2447 if (TrafficLogFile != NULL) 2448 fputc(c, TrafficLogFile); 2449 putc(c, mci->mci_out); 2450 pos++; 2451 ostate = c == '\n' ? OS_HEAD : OS_INLINE; 2452 break; 2453 } 2454 } 2455 } 2456 2457 if (ferror(e->e_dfp)) 2458 { 2459 syserr("putbody: df%s: read error", e->e_id); 2460 ExitStat = EX_IOERR; 2461 } 2462 2463 endofmessage: 2464 /* some mailers want extra blank line at end of message */ 2465 if (bitnset(M_BLANKEND, mci->mci_mailer->m_flags) && 2466 buf[0] != '\0' && buf[0] != '\n') 2467 putline("", mci); 2468 2469 (void) fflush(mci->mci_out); 2470 if (ferror(mci->mci_out) && errno != EPIPE) 2471 { 2472 syserr("putbody: write error"); 2473 ExitStat = EX_IOERR; 2474 } 2475 errno = 0; 2476 } 2477 /* 2478 ** MAILFILE -- Send a message to a file. 2479 ** 2480 ** If the file has the setuid/setgid bits set, but NO execute 2481 ** bits, sendmail will try to become the owner of that file 2482 ** rather than the real user. Obviously, this only works if 2483 ** sendmail runs as root. 2484 ** 2485 ** This could be done as a subordinate mailer, except that it 2486 ** is used implicitly to save messages in ~/dead.letter. We 2487 ** view this as being sufficiently important as to include it 2488 ** here. For example, if the system is dying, we shouldn't have 2489 ** to create another process plus some pipes to save the message. 2490 ** 2491 ** Parameters: 2492 ** filename -- the name of the file to send to. 2493 ** ctladdr -- the controlling address header -- includes 2494 ** the userid/groupid to be when sending. 2495 ** 2496 ** Returns: 2497 ** The exit code associated with the operation. 2498 ** 2499 ** Side Effects: 2500 ** none. 2501 */ 2502 2503 mailfile(filename, ctladdr, e) 2504 char *filename; 2505 ADDRESS *ctladdr; 2506 register ENVELOPE *e; 2507 { 2508 register FILE *f; 2509 register int pid = -1; 2510 int mode; 2511 2512 if (tTd(11, 1)) 2513 { 2514 printf("mailfile %s\n ctladdr=", filename); 2515 printaddr(ctladdr, FALSE); 2516 } 2517 2518 if (e->e_xfp != NULL) 2519 fflush(e->e_xfp); 2520 2521 /* 2522 ** Fork so we can change permissions here. 2523 ** Note that we MUST use fork, not vfork, because of 2524 ** the complications of calling subroutines, etc. 2525 */ 2526 2527 DOFORK(fork); 2528 2529 if (pid < 0) 2530 return (EX_OSERR); 2531 else if (pid == 0) 2532 { 2533 /* child -- actually write to file */ 2534 struct stat stb; 2535 struct stat fsb; 2536 MCI mcibuf; 2537 int oflags = O_WRONLY|O_APPEND; 2538 2539 if (e->e_lockfp != NULL) 2540 (void) close(fileno(e->e_lockfp)); 2541 2542 (void) setsignal(SIGINT, SIG_DFL); 2543 (void) setsignal(SIGHUP, SIG_DFL); 2544 (void) setsignal(SIGTERM, SIG_DFL); 2545 (void) umask(OldUmask); 2546 2547 #ifdef HASLSTAT 2548 if ((SafeFileEnv != NULL ? lstat(filename, &stb) 2549 : stat(filename, &stb)) < 0) 2550 #else 2551 if (stat(filename, &stb) < 0) 2552 #endif 2553 { 2554 stb.st_mode = FileMode; 2555 oflags |= O_CREAT|O_EXCL; 2556 } 2557 else if (bitset(0111, stb.st_mode) || stb.st_nlink != 1 || 2558 (SafeFileEnv != NULL && !S_ISREG(stb.st_mode))) 2559 exit(EX_CANTCREAT); 2560 mode = stb.st_mode; 2561 2562 /* limit the errors to those actually caused in the child */ 2563 errno = 0; 2564 ExitStat = EX_OK; 2565 2566 if (ctladdr != NULL) 2567 { 2568 /* ignore setuid and setgid bits */ 2569 mode &= ~(S_ISGID|S_ISUID); 2570 } 2571 2572 /* we have to open the dfile BEFORE setuid */ 2573 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags)) 2574 { 2575 char *df = queuename(e, 'd'); 2576 2577 e->e_dfp = fopen(df, "r"); 2578 if (e->e_dfp == NULL) 2579 { 2580 syserr("mailfile: Cannot open %s for %s from %s", 2581 df, e->e_to, e->e_from.q_paddr); 2582 } 2583 } 2584 2585 if (SafeFileEnv != NULL && SafeFileEnv[0] != '\0') 2586 { 2587 int i; 2588 2589 if (chroot(SafeFileEnv) < 0) 2590 { 2591 syserr("mailfile: Cannot chroot(%s)", 2592 SafeFileEnv); 2593 exit(EX_CANTCREAT); 2594 } 2595 i = strlen(SafeFileEnv); 2596 if (strncmp(SafeFileEnv, filename, i) == 0) 2597 filename += i; 2598 } 2599 if (chdir("/") < 0) 2600 syserr("mailfile: cannot chdir(/)"); 2601 2602 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 2603 { 2604 if (ctladdr != NULL && ctladdr->q_uid != 0) 2605 (void) initgroups(ctladdr->q_ruser ? 2606 ctladdr->q_ruser : ctladdr->q_user, 2607 ctladdr->q_gid); 2608 else if (FileMailer != NULL && FileMailer->m_gid != 0) 2609 (void) initgroups(DefUser, FileMailer->m_gid); 2610 else 2611 (void) initgroups(DefUser, DefGid); 2612 } 2613 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 2614 { 2615 if (ctladdr != NULL && ctladdr->q_uid != 0) 2616 (void) setuid(ctladdr->q_uid); 2617 else if (FileMailer != NULL && FileMailer->m_uid != 0) 2618 (void) setuid(FileMailer->m_uid); 2619 else 2620 (void) setuid(DefUid); 2621 } 2622 FileName = filename; 2623 LineNumber = 0; 2624 f = dfopen(filename, oflags, FileMode); 2625 if (f == NULL) 2626 { 2627 message("554 cannot open: %s", errstring(errno)); 2628 exit(EX_CANTCREAT); 2629 } 2630 if (fstat(fileno(f), &fsb) < 0 || 2631 (!bitset(O_CREAT, oflags) && 2632 (stb.st_nlink != fsb.st_nlink || 2633 stb.st_dev != fsb.st_dev || 2634 stb.st_ino != fsb.st_ino || 2635 stb.st_uid != fsb.st_uid))) 2636 { 2637 message("554 cannot write: file changed after open"); 2638 exit(EX_CANTCREAT); 2639 } 2640 2641 bzero(&mcibuf, sizeof mcibuf); 2642 mcibuf.mci_mailer = FileMailer; 2643 mcibuf.mci_out = f; 2644 if (bitnset(M_7BITS, FileMailer->m_flags)) 2645 mcibuf.mci_flags |= MCIF_7BIT; 2646 2647 putfromline(&mcibuf, e); 2648 (*e->e_puthdr)(&mcibuf, e->e_header, e); 2649 (*e->e_putbody)(&mcibuf, e, NULL); 2650 putline("\n", &mcibuf); 2651 if (ferror(f)) 2652 { 2653 message("451 I/O error: %s", errstring(errno)); 2654 setstat(EX_IOERR); 2655 } 2656 (void) xfclose(f, "mailfile", filename); 2657 (void) fflush(stdout); 2658 2659 /* reset ISUID & ISGID bits for paranoid systems */ 2660 (void) chmod(filename, (int) stb.st_mode); 2661 exit(ExitStat); 2662 /*NOTREACHED*/ 2663 } 2664 else 2665 { 2666 /* parent -- wait for exit status */ 2667 int st; 2668 2669 st = waitfor(pid); 2670 if (WIFEXITED(st)) 2671 return (WEXITSTATUS(st)); 2672 else 2673 { 2674 syserr("child died on signal %d", st); 2675 return (EX_UNAVAILABLE); 2676 } 2677 /*NOTREACHED*/ 2678 } 2679 } 2680 /* 2681 ** HOSTSIGNATURE -- return the "signature" for a host. 2682 ** 2683 ** The signature describes how we are going to send this -- it 2684 ** can be just the hostname (for non-Internet hosts) or can be 2685 ** an ordered list of MX hosts. 2686 ** 2687 ** Parameters: 2688 ** m -- the mailer describing this host. 2689 ** host -- the host name. 2690 ** e -- the current envelope. 2691 ** 2692 ** Returns: 2693 ** The signature for this host. 2694 ** 2695 ** Side Effects: 2696 ** Can tweak the symbol table. 2697 */ 2698 2699 char * 2700 hostsignature(m, host, e) 2701 register MAILER *m; 2702 char *host; 2703 ENVELOPE *e; 2704 { 2705 register char *p; 2706 register STAB *s; 2707 int i; 2708 int len; 2709 #if NAMED_BIND 2710 int nmx; 2711 auto int rcode; 2712 char *hp; 2713 char *endp; 2714 int oldoptions = _res.options; 2715 char *mxhosts[MAXMXHOSTS + 1]; 2716 #endif 2717 2718 /* 2719 ** Check to see if this uses IPC -- if not, it can't have MX records. 2720 */ 2721 2722 p = m->m_mailer; 2723 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2724 { 2725 /* just an ordinary mailer */ 2726 return host; 2727 } 2728 2729 /* 2730 ** Look it up in the symbol table. 2731 */ 2732 2733 s = stab(host, ST_HOSTSIG, ST_ENTER); 2734 if (s->s_hostsig != NULL) 2735 return s->s_hostsig; 2736 2737 /* 2738 ** Not already there -- create a signature. 2739 */ 2740 2741 #if NAMED_BIND 2742 if (ConfigLevel < 2) 2743 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2744 2745 for (hp = host; hp != NULL; hp = endp) 2746 { 2747 endp = strchr(hp, ':'); 2748 if (endp != NULL) 2749 *endp = '\0'; 2750 2751 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2752 2753 if (nmx <= 0) 2754 { 2755 register MCI *mci; 2756 2757 /* update the connection info for this host */ 2758 mci = mci_get(hp, m); 2759 mci->mci_exitstat = rcode; 2760 mci->mci_errno = errno; 2761 mci->mci_herrno = h_errno; 2762 2763 /* and return the original host name as the signature */ 2764 nmx = 1; 2765 mxhosts[0] = hp; 2766 } 2767 2768 len = 0; 2769 for (i = 0; i < nmx; i++) 2770 { 2771 len += strlen(mxhosts[i]) + 1; 2772 } 2773 if (s->s_hostsig != NULL) 2774 len += strlen(s->s_hostsig) + 1; 2775 p = xalloc(len); 2776 if (s->s_hostsig != NULL) 2777 { 2778 (void) strcpy(p, s->s_hostsig); 2779 free(s->s_hostsig); 2780 s->s_hostsig = p; 2781 p += strlen(p); 2782 *p++ = ':'; 2783 } 2784 else 2785 s->s_hostsig = p; 2786 for (i = 0; i < nmx; i++) 2787 { 2788 if (i != 0) 2789 *p++ = ':'; 2790 strcpy(p, mxhosts[i]); 2791 p += strlen(p); 2792 } 2793 if (endp != NULL) 2794 *endp++ = ':'; 2795 } 2796 makelower(s->s_hostsig); 2797 if (ConfigLevel < 2) 2798 _res.options = oldoptions; 2799 #else 2800 /* not using BIND -- the signature is just the host name */ 2801 s->s_hostsig = host; 2802 #endif 2803 if (tTd(17, 1)) 2804 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2805 return s->s_hostsig; 2806 } 2807 /* 2808 ** SETSTATUS -- set the address status for return messages 2809 ** 2810 ** Parameters: 2811 ** a -- the address to set. 2812 ** msg -- the text of the message, which must be in standard 2813 ** SMTP form (3 digits, a space, and a message). 2814 ** 2815 ** Returns: 2816 ** none. 2817 */ 2818 2819 setstatus(a, msg) 2820 register ADDRESS *a; 2821 char *msg; 2822 { 2823 char buf[MAXLINE]; 2824 2825 if (a->q_rstatus != NULL) 2826 free(a->q_rstatus); 2827 if (strlen(msg) > (SIZE_T) 4) 2828 { 2829 register char *p, *q; 2830 int parenlev = 0; 2831 2832 strncpy(buf, msg, 4); 2833 p = &buf[4]; 2834 *p++ = '('; 2835 for (q = &msg[4]; *q != '\0'; q++) 2836 { 2837 switch (*q) 2838 { 2839 case '(': 2840 parenlev++; 2841 break; 2842 2843 case ')': 2844 if (parenlev > 0) 2845 parenlev--; 2846 else 2847 *p++ = '\\'; 2848 break; 2849 } 2850 *p++ = *q; 2851 } 2852 while (parenlev-- >= 0) 2853 *p++ = ')'; 2854 *p++ = '\0'; 2855 msg = buf; 2856 } 2857 a->q_rstatus = newstr(msg); 2858 } 2859