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 8.156 (Berkeley) 06/10/95"; 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 int 600 dofork() 601 { 602 register int pid = -1; 603 604 DOFORK(fork); 605 return (pid); 606 } 607 /* 608 ** DELIVER -- Deliver a message to a list of addresses. 609 ** 610 ** This routine delivers to everyone on the same host as the 611 ** user on the head of the list. It is clever about mailers 612 ** that don't handle multiple users. It is NOT guaranteed 613 ** that it will deliver to all these addresses however -- so 614 ** deliver should be called once for each address on the 615 ** list. 616 ** 617 ** Parameters: 618 ** e -- the envelope to deliver. 619 ** firstto -- head of the address list to deliver to. 620 ** 621 ** Returns: 622 ** zero -- successfully delivered. 623 ** else -- some failure, see ExitStat for more info. 624 ** 625 ** Side Effects: 626 ** The standard input is passed off to someone. 627 */ 628 629 int 630 deliver(e, firstto) 631 register ENVELOPE *e; 632 ADDRESS *firstto; 633 { 634 char *host; /* host being sent to */ 635 char *user; /* user being sent to */ 636 char **pvp; 637 register char **mvp; 638 register char *p; 639 register MAILER *m; /* mailer for this recipient */ 640 ADDRESS *ctladdr; 641 register MCI *mci; 642 register ADDRESS *to = firstto; 643 bool clever = FALSE; /* running user smtp to this mailer */ 644 ADDRESS *tochain = NULL; /* users chain in this mailer call */ 645 int rcode; /* response code */ 646 char *firstsig; /* signature of firstto */ 647 int pid = -1; 648 char *curhost; 649 time_t xstart; 650 int mpvect[2]; 651 int rpvect[2]; 652 char *pv[MAXPV+1]; 653 char tobuf[TOBUFSIZE]; /* text line of to people */ 654 char buf[MAXNAME + 1]; 655 char rpathbuf[MAXNAME + 1]; /* translated return path */ 656 extern int checkcompat(); 657 extern void markfailure __P((ENVELOPE *, ADDRESS *, MCI *, int)); 658 659 errno = 0; 660 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 661 return (0); 662 663 #if NAMED_BIND 664 /* unless interactive, try twice, over a minute */ 665 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) 666 { 667 _res.retrans = 30; 668 _res.retry = 2; 669 } 670 #endif 671 672 m = to->q_mailer; 673 host = to->q_host; 674 CurEnv = e; /* just in case */ 675 e->e_statmsg = NULL; 676 SmtpError[0] = '\0'; 677 xstart = curtime(); 678 679 if (tTd(10, 1)) 680 printf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n", 681 e->e_id, m->m_name, host, to->q_user); 682 if (tTd(10, 100)) 683 printopenfds(FALSE); 684 685 /* 686 ** Do initial argv setup. 687 ** Insert the mailer name. Notice that $x expansion is 688 ** NOT done on the mailer name. Then, if the mailer has 689 ** a picky -f flag, we insert it as appropriate. This 690 ** code does not check for 'pv' overflow; this places a 691 ** manifest lower limit of 4 for MAXPV. 692 ** The from address rewrite is expected to make 693 ** the address relative to the other end. 694 */ 695 696 /* rewrite from address, using rewriting rules */ 697 rcode = EX_OK; 698 if (bitnset(M_UDBENVELOPE, e->e_from.q_mailer->m_flags)) 699 p = e->e_sender; 700 else 701 p = e->e_from.q_paddr; 702 (void) strcpy(rpathbuf, remotename(p, m, 703 RF_SENDERADDR|RF_CANONICAL, 704 &rcode, e)); 705 define('g', rpathbuf, e); /* translated return path */ 706 define('h', host, e); /* to host */ 707 Errors = 0; 708 pvp = pv; 709 *pvp++ = m->m_argv[0]; 710 711 /* insert -f or -r flag as appropriate */ 712 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 713 { 714 if (bitnset(M_FOPT, m->m_flags)) 715 *pvp++ = "-f"; 716 else 717 *pvp++ = "-r"; 718 *pvp++ = newstr(rpathbuf); 719 } 720 721 /* 722 ** Append the other fixed parts of the argv. These run 723 ** up to the first entry containing "$u". There can only 724 ** be one of these, and there are only a few more slots 725 ** in the pv after it. 726 */ 727 728 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 729 { 730 /* can't use strchr here because of sign extension problems */ 731 while (*p != '\0') 732 { 733 if ((*p++ & 0377) == MACROEXPAND) 734 { 735 if (*p == 'u') 736 break; 737 } 738 } 739 740 if (*p != '\0') 741 break; 742 743 /* this entry is safe -- go ahead and process it */ 744 expand(*mvp, buf, sizeof buf, e); 745 *pvp++ = newstr(buf); 746 if (pvp >= &pv[MAXPV - 3]) 747 { 748 syserr("554 Too many parameters to %s before $u", pv[0]); 749 return (-1); 750 } 751 } 752 753 /* 754 ** If we have no substitution for the user name in the argument 755 ** list, we know that we must supply the names otherwise -- and 756 ** SMTP is the answer!! 757 */ 758 759 if (*mvp == NULL) 760 { 761 /* running SMTP */ 762 # ifdef SMTP 763 clever = TRUE; 764 *pvp = NULL; 765 # else /* SMTP */ 766 /* oops! we don't implement SMTP */ 767 syserr("554 SMTP style mailer not implemented"); 768 return (EX_SOFTWARE); 769 # endif /* SMTP */ 770 } 771 772 /* 773 ** At this point *mvp points to the argument with $u. We 774 ** run through our address list and append all the addresses 775 ** we can. If we run out of space, do not fret! We can 776 ** always send another copy later. 777 */ 778 779 tobuf[0] = '\0'; 780 e->e_to = tobuf; 781 ctladdr = NULL; 782 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 783 for (; to != NULL; to = to->q_next) 784 { 785 /* avoid sending multiple recipients to dumb mailers */ 786 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 787 break; 788 789 /* if already sent or not for this host, don't send */ 790 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 791 to->q_mailer != firstto->q_mailer || 792 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 793 continue; 794 795 /* avoid overflowing tobuf */ 796 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 797 break; 798 799 if (tTd(10, 1)) 800 { 801 printf("\nsend to "); 802 printaddr(to, FALSE); 803 } 804 805 /* compute effective uid/gid when sending */ 806 if (bitnset(M_RUNASRCPT, to->q_mailer->m_flags)) 807 ctladdr = getctladdr(to); 808 809 if (tTd(10, 2)) 810 { 811 printf("ctladdr="); 812 printaddr(ctladdr, FALSE); 813 } 814 815 user = to->q_user; 816 e->e_to = to->q_paddr; 817 if (tTd(10, 5)) 818 { 819 printf("deliver: QDONTSEND "); 820 printaddr(to, FALSE); 821 } 822 to->q_flags |= QDONTSEND; 823 824 /* 825 ** Check to see that these people are allowed to 826 ** talk to each other. 827 */ 828 829 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 830 { 831 e->e_flags |= EF_NO_BODY_RETN; 832 to->q_status = "5.2.3"; 833 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 834 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, xstart, e); 835 continue; 836 } 837 #if NAMED_BIND 838 h_errno = 0; 839 #endif 840 rcode = checkcompat(to, e); 841 if (rcode != EX_OK) 842 { 843 markfailure(e, to, NULL, rcode); 844 giveresponse(rcode, m, NULL, ctladdr, xstart, e); 845 continue; 846 } 847 848 /* 849 ** Strip quote bits from names if the mailer is dumb 850 ** about them. 851 */ 852 853 if (bitnset(M_STRIPQ, m->m_flags)) 854 { 855 stripquotes(user); 856 stripquotes(host); 857 } 858 859 /* hack attack -- delivermail compatibility */ 860 if (m == ProgMailer && *user == '|') 861 user++; 862 863 /* 864 ** If an error message has already been given, don't 865 ** bother to send to this address. 866 ** 867 ** >>>>>>>>>> This clause assumes that the local mailer 868 ** >> NOTE >> cannot do any further aliasing; that 869 ** >>>>>>>>>> function is subsumed by sendmail. 870 */ 871 872 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 873 continue; 874 875 /* save statistics.... */ 876 markstats(e, to); 877 878 /* 879 ** See if this user name is "special". 880 ** If the user name has a slash in it, assume that this 881 ** is a file -- send it off without further ado. Note 882 ** that this type of addresses is not processed along 883 ** with the others, so we fudge on the To person. 884 */ 885 886 if (strcmp(m->m_mailer, "[FILE]") == 0) 887 { 888 rcode = mailfile(user, ctladdr, SFF_CREAT, e); 889 giveresponse(rcode, m, NULL, ctladdr, xstart, e); 890 e->e_nsent++; 891 if (rcode == EX_OK) 892 { 893 to->q_flags |= QSENT; 894 if (bitnset(M_LOCALMAILER, m->m_flags) && 895 (e->e_receiptto != NULL || 896 bitset(QPINGONSUCCESS, to->q_flags))) 897 { 898 to->q_flags |= QDELIVERED; 899 to->q_status = "2.1.5"; 900 fprintf(e->e_xfp, "%s... Successfully delivered\n", 901 to->q_paddr); 902 } 903 } 904 to->q_statdate = curtime(); 905 continue; 906 } 907 908 /* 909 ** Address is verified -- add this user to mailer 910 ** argv, and add it to the print list of recipients. 911 */ 912 913 /* link together the chain of recipients */ 914 to->q_tchain = tochain; 915 tochain = to; 916 917 /* create list of users for error messages */ 918 (void) strcat(tobuf, ","); 919 (void) strcat(tobuf, to->q_paddr); 920 define('u', user, e); /* to user */ 921 p = to->q_home; 922 if (p == NULL && ctladdr != NULL) 923 p = ctladdr->q_home; 924 define('z', p, e); /* user's home */ 925 926 /* 927 ** Expand out this user into argument list. 928 */ 929 930 if (!clever) 931 { 932 expand(*mvp, buf, sizeof buf, e); 933 *pvp++ = newstr(buf); 934 if (pvp >= &pv[MAXPV - 2]) 935 { 936 /* allow some space for trailing parms */ 937 break; 938 } 939 } 940 } 941 942 /* see if any addresses still exist */ 943 if (tobuf[0] == '\0') 944 { 945 define('g', (char *) NULL, e); 946 return (0); 947 } 948 949 /* print out messages as full list */ 950 e->e_to = tobuf + 1; 951 952 /* 953 ** Fill out any parameters after the $u parameter. 954 */ 955 956 while (!clever && *++mvp != NULL) 957 { 958 expand(*mvp, buf, sizeof buf, e); 959 *pvp++ = newstr(buf); 960 if (pvp >= &pv[MAXPV]) 961 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 962 } 963 *pvp++ = NULL; 964 965 /* 966 ** Call the mailer. 967 ** The argument vector gets built, pipes 968 ** are created as necessary, and we fork & exec as 969 ** appropriate. 970 ** If we are running SMTP, we just need to clean up. 971 */ 972 973 /*XXX this seems a bit wierd */ 974 if (ctladdr == NULL && m != ProgMailer && m != FileMailer && 975 bitset(QGOODUID, e->e_from.q_flags)) 976 ctladdr = &e->e_from; 977 978 #if NAMED_BIND 979 if (ConfigLevel < 2) 980 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 981 #endif 982 983 if (tTd(11, 1)) 984 { 985 printf("openmailer:"); 986 printav(pv); 987 } 988 errno = 0; 989 #if NAMED_BIND 990 h_errno = 0; 991 #endif 992 993 CurHostName = NULL; 994 995 /* 996 ** Deal with the special case of mail handled through an IPC 997 ** connection. 998 ** In this case we don't actually fork. We must be 999 ** running SMTP for this to work. We will return a 1000 ** zero pid to indicate that we are running IPC. 1001 ** We also handle a debug version that just talks to stdin/out. 1002 */ 1003 1004 curhost = NULL; 1005 SmtpPhase = NULL; 1006 mci = NULL; 1007 1008 #ifdef XDEBUG 1009 { 1010 char wbuf[MAXLINE]; 1011 1012 /* make absolutely certain 0, 1, and 2 are in use */ 1013 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 1014 checkfd012(wbuf); 1015 } 1016 #endif 1017 1018 /* check for 8-bit available */ 1019 if (bitset(EF_HAS8BIT, e->e_flags) && 1020 bitnset(M_7BITS, m->m_flags) && 1021 !bitset(MM_MIME8BIT, MimeMode)) 1022 { 1023 usrerr("554 Cannot send 8-bit data to 7-bit destination"); 1024 rcode = EX_DATAERR; 1025 e->e_status = "5.6.3"; 1026 goto give_up; 1027 } 1028 1029 /* check for Local Person Communication -- not for mortals!!! */ 1030 if (strcmp(m->m_mailer, "[LPC]") == 0) 1031 { 1032 mci = (MCI *) xalloc(sizeof *mci); 1033 bzero((char *) mci, sizeof *mci); 1034 mci->mci_in = stdin; 1035 mci->mci_out = stdout; 1036 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1037 mci->mci_mailer = m; 1038 } 1039 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 1040 strcmp(m->m_mailer, "[TCP]") == 0) 1041 { 1042 #ifdef DAEMON 1043 register int i; 1044 register u_short port = 0; 1045 1046 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 1047 { 1048 syserr("null host name for %s mailer", m->m_mailer); 1049 rcode = EX_CONFIG; 1050 goto give_up; 1051 } 1052 1053 CurHostName = pv[1]; 1054 curhost = hostsignature(m, pv[1], e); 1055 1056 if (curhost == NULL || curhost[0] == '\0') 1057 { 1058 syserr("null host signature for %s", pv[1]); 1059 rcode = EX_CONFIG; 1060 goto give_up; 1061 } 1062 1063 if (!clever) 1064 { 1065 syserr("554 non-clever IPC"); 1066 rcode = EX_CONFIG; 1067 goto give_up; 1068 } 1069 if (pv[2] != NULL) 1070 { 1071 port = htons(atoi(pv[2])); 1072 if (port == 0) 1073 { 1074 struct servent *sp = getservbyname(pv[2], "tcp"); 1075 1076 if (sp == NULL) 1077 syserr("Service %s unknown", pv[2]); 1078 else 1079 port = sp->s_port; 1080 } 1081 } 1082 tryhost: 1083 while (*curhost != '\0') 1084 { 1085 register char *p; 1086 static char hostbuf[MAXNAME + 1]; 1087 1088 /* pull the next host from the signature */ 1089 p = strchr(curhost, ':'); 1090 if (p == NULL) 1091 p = &curhost[strlen(curhost)]; 1092 if (p == curhost) 1093 { 1094 syserr("deliver: null host name in signature"); 1095 curhost++; 1096 continue; 1097 } 1098 strncpy(hostbuf, curhost, p - curhost); 1099 hostbuf[p - curhost] = '\0'; 1100 if (*p != '\0') 1101 p++; 1102 curhost = p; 1103 1104 /* see if we already know that this host is fried */ 1105 CurHostName = hostbuf; 1106 mci = mci_get(hostbuf, m); 1107 if (mci->mci_state != MCIS_CLOSED) 1108 { 1109 if (tTd(11, 1)) 1110 { 1111 printf("openmailer: "); 1112 mci_dump(mci, FALSE); 1113 } 1114 CurHostName = mci->mci_host; 1115 message("Using cached connection to %s via %s...", 1116 hostbuf, m->m_name); 1117 break; 1118 } 1119 mci->mci_mailer = m; 1120 if (mci->mci_exitstat != EX_OK) 1121 continue; 1122 1123 /* try the connection */ 1124 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1125 message("Connecting to %s via %s...", 1126 hostbuf, m->m_name); 1127 i = makeconnection(hostbuf, port, mci, 1128 bitnset(M_SECURE_PORT, m->m_flags)); 1129 mci->mci_exitstat = i; 1130 mci->mci_errno = errno; 1131 #if NAMED_BIND 1132 mci->mci_herrno = h_errno; 1133 #endif 1134 if (i == EX_OK) 1135 { 1136 mci->mci_state = MCIS_OPENING; 1137 mci_cache(mci); 1138 if (TrafficLogFile != NULL) 1139 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1140 getpid(), hostbuf); 1141 break; 1142 } 1143 else if (tTd(11, 1)) 1144 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1145 i, errno); 1146 1147 /* enter status of this host */ 1148 setstat(i); 1149 1150 /* should print some message here for -v mode */ 1151 } 1152 if (mci == NULL) 1153 { 1154 syserr("deliver: no host name"); 1155 rcode = EX_OSERR; 1156 goto give_up; 1157 } 1158 mci->mci_pid = 0; 1159 #else /* no DAEMON */ 1160 syserr("554 openmailer: no IPC"); 1161 if (tTd(11, 1)) 1162 printf("openmailer: NULL\n"); 1163 rcode = EX_UNAVAILABLE; 1164 goto give_up; 1165 #endif /* DAEMON */ 1166 } 1167 else 1168 { 1169 /* flush any expired connections */ 1170 (void) mci_scan(NULL); 1171 1172 /* announce the connection to verbose listeners */ 1173 if (host == NULL || host[0] == '\0') 1174 message("Connecting to %s...", m->m_name); 1175 else 1176 message("Connecting to %s via %s...", host, m->m_name); 1177 if (TrafficLogFile != NULL) 1178 { 1179 char **av; 1180 1181 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1182 for (av = pv; *av != NULL; av++) 1183 fprintf(TrafficLogFile, " %s", *av); 1184 fprintf(TrafficLogFile, "\n"); 1185 } 1186 1187 /* create a pipe to shove the mail through */ 1188 if (pipe(mpvect) < 0) 1189 { 1190 syserr("%s... openmailer(%s): pipe (to mailer)", 1191 e->e_to, m->m_name); 1192 if (tTd(11, 1)) 1193 printf("openmailer: NULL\n"); 1194 rcode = EX_OSERR; 1195 goto give_up; 1196 } 1197 1198 /* if this mailer speaks smtp, create a return pipe */ 1199 if (clever && pipe(rpvect) < 0) 1200 { 1201 syserr("%s... openmailer(%s): pipe (from mailer)", 1202 e->e_to, m->m_name); 1203 (void) close(mpvect[0]); 1204 (void) close(mpvect[1]); 1205 if (tTd(11, 1)) 1206 printf("openmailer: NULL\n"); 1207 rcode = EX_OSERR; 1208 goto give_up; 1209 } 1210 1211 /* 1212 ** Actually fork the mailer process. 1213 ** DOFORK is clever about retrying. 1214 ** 1215 ** Dispose of SIGCHLD signal catchers that may be laying 1216 ** around so that endmail will get it. 1217 */ 1218 1219 if (e->e_xfp != NULL) 1220 (void) fflush(e->e_xfp); /* for debugging */ 1221 (void) fflush(stdout); 1222 # ifdef SIGCHLD 1223 (void) setsignal(SIGCHLD, SIG_DFL); 1224 # endif /* SIGCHLD */ 1225 DOFORK(FORK); 1226 /* pid is set by DOFORK */ 1227 if (pid < 0) 1228 { 1229 /* failure */ 1230 syserr("%s... openmailer(%s): cannot fork", 1231 e->e_to, m->m_name); 1232 (void) close(mpvect[0]); 1233 (void) close(mpvect[1]); 1234 if (clever) 1235 { 1236 (void) close(rpvect[0]); 1237 (void) close(rpvect[1]); 1238 } 1239 if (tTd(11, 1)) 1240 printf("openmailer: NULL\n"); 1241 rcode = EX_OSERR; 1242 goto give_up; 1243 } 1244 else if (pid == 0) 1245 { 1246 int i; 1247 int saveerrno; 1248 struct stat stb; 1249 extern int DtableSize; 1250 1251 if (e->e_lockfp != NULL) 1252 (void) close(fileno(e->e_lockfp)); 1253 1254 /* child -- set up input & exec mailer */ 1255 (void) setsignal(SIGINT, SIG_IGN); 1256 (void) setsignal(SIGHUP, SIG_IGN); 1257 (void) setsignal(SIGTERM, SIG_DFL); 1258 1259 if (m != FileMailer || stat(to->q_user, &stb) < 0) 1260 stb.st_mode = 0; 1261 1262 /* tweak niceness */ 1263 if (m->m_nice != 0) 1264 nice(m->m_nice); 1265 1266 /* reset group id */ 1267 if (bitnset(M_SPECIFIC_UID, m->m_flags)) 1268 (void) setgid(m->m_gid); 1269 else if (bitset(S_ISGID, stb.st_mode)) 1270 (void) setgid(stb.st_gid); 1271 else if (ctladdr != NULL && ctladdr->q_gid != 0) 1272 { 1273 (void) initgroups(ctladdr->q_ruser? 1274 ctladdr->q_ruser: ctladdr->q_user, 1275 ctladdr->q_gid); 1276 (void) setgid(ctladdr->q_gid); 1277 } 1278 else 1279 { 1280 (void) initgroups(DefUser, DefGid); 1281 if (m->m_gid == 0) 1282 (void) setgid(DefGid); 1283 else 1284 (void) setgid(m->m_gid); 1285 } 1286 1287 /* reset user id */ 1288 if (bitnset(M_SPECIFIC_UID, m->m_flags)) 1289 (void) setuid(m->m_uid); 1290 else if (bitset(S_ISUID, stb.st_mode)) 1291 (void) setuid(stb.st_uid); 1292 else if (ctladdr != NULL && ctladdr->q_uid != 0) 1293 (void) setuid(ctladdr->q_uid); 1294 else 1295 { 1296 if (m->m_uid == 0) 1297 (void) setuid(DefUid); 1298 else 1299 (void) setuid(m->m_uid); 1300 } 1301 1302 if (tTd(11, 2)) 1303 printf("openmailer: running as r/euid=%d/%d\n", 1304 getuid(), geteuid()); 1305 1306 /* move into some "safe" directory */ 1307 if (m->m_execdir != NULL) 1308 { 1309 char *p, *q; 1310 char buf[MAXLINE + 1]; 1311 1312 for (p = m->m_execdir; p != NULL; p = q) 1313 { 1314 q = strchr(p, ':'); 1315 if (q != NULL) 1316 *q = '\0'; 1317 expand(p, buf, sizeof buf, e); 1318 if (q != NULL) 1319 *q++ = ':'; 1320 if (tTd(11, 20)) 1321 printf("openmailer: trydir %s\n", 1322 buf); 1323 if (buf[0] != '\0' && chdir(buf) >= 0) 1324 break; 1325 } 1326 } 1327 1328 /* arrange to filter std & diag output of command */ 1329 if (clever) 1330 { 1331 (void) close(rpvect[0]); 1332 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1333 { 1334 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1335 e->e_to, m->m_name, rpvect[1]); 1336 _exit(EX_OSERR); 1337 } 1338 (void) close(rpvect[1]); 1339 } 1340 else if (OpMode == MD_SMTP || OpMode == MD_DAEMON || 1341 HoldErrs || DisConnected) 1342 { 1343 /* put mailer output in transcript */ 1344 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1345 { 1346 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1347 e->e_to, m->m_name, 1348 fileno(e->e_xfp)); 1349 _exit(EX_OSERR); 1350 } 1351 } 1352 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1353 { 1354 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1355 e->e_to, m->m_name); 1356 _exit(EX_OSERR); 1357 } 1358 1359 /* arrange to get standard input */ 1360 (void) close(mpvect[1]); 1361 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1362 { 1363 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1364 e->e_to, m->m_name, mpvect[0]); 1365 _exit(EX_OSERR); 1366 } 1367 (void) close(mpvect[0]); 1368 1369 /* arrange for all the files to be closed */ 1370 for (i = 3; i < DtableSize; i++) 1371 { 1372 register int j; 1373 1374 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1375 (void) fcntl(i, F_SETFD, j | 1); 1376 } 1377 1378 /* run disconnected from terminal */ 1379 (void) setsid(); 1380 1381 /* try to execute the mailer */ 1382 execve(m->m_mailer, (ARGV_T) pv, (ARGV_T) UserEnviron); 1383 saveerrno = errno; 1384 syserr("Cannot exec %s", m->m_mailer); 1385 if (bitnset(M_LOCALMAILER, m->m_flags) || 1386 transienterror(saveerrno)) 1387 _exit(EX_OSERR); 1388 _exit(EX_UNAVAILABLE); 1389 } 1390 1391 /* 1392 ** Set up return value. 1393 */ 1394 1395 mci = (MCI *) xalloc(sizeof *mci); 1396 bzero((char *) mci, sizeof *mci); 1397 mci->mci_mailer = m; 1398 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1399 mci->mci_pid = pid; 1400 (void) close(mpvect[0]); 1401 mci->mci_out = fdopen(mpvect[1], "w"); 1402 if (mci->mci_out == NULL) 1403 { 1404 syserr("deliver: cannot create mailer output channel, fd=%d", 1405 mpvect[1]); 1406 (void) close(mpvect[1]); 1407 if (clever) 1408 { 1409 (void) close(rpvect[0]); 1410 (void) close(rpvect[1]); 1411 } 1412 rcode = EX_OSERR; 1413 goto give_up; 1414 } 1415 if (clever) 1416 { 1417 (void) close(rpvect[1]); 1418 mci->mci_in = fdopen(rpvect[0], "r"); 1419 if (mci->mci_in == NULL) 1420 { 1421 syserr("deliver: cannot create mailer input channel, fd=%d", 1422 mpvect[1]); 1423 (void) close(rpvect[0]); 1424 fclose(mci->mci_out); 1425 mci->mci_out = NULL; 1426 rcode = EX_OSERR; 1427 goto give_up; 1428 } 1429 } 1430 else 1431 { 1432 mci->mci_flags |= MCIF_TEMP; 1433 mci->mci_in = NULL; 1434 } 1435 } 1436 1437 /* 1438 ** If we are in SMTP opening state, send initial protocol. 1439 */ 1440 1441 if (clever && mci->mci_state != MCIS_CLOSED) 1442 { 1443 smtpinit(m, mci, e); 1444 } 1445 1446 if (bitset(EF_HAS8BIT, e->e_flags) && bitnset(M_7BITS, m->m_flags)) 1447 mci->mci_flags |= MCIF_CVT8TO7; 1448 else 1449 mci->mci_flags &= ~MCIF_CVT8TO7; 1450 1451 if (tTd(11, 1)) 1452 { 1453 printf("openmailer: "); 1454 mci_dump(mci, FALSE); 1455 } 1456 1457 if (mci->mci_state != MCIS_OPEN) 1458 { 1459 /* couldn't open the mailer */ 1460 rcode = mci->mci_exitstat; 1461 errno = mci->mci_errno; 1462 #if NAMED_BIND 1463 h_errno = mci->mci_herrno; 1464 #endif 1465 if (rcode == EX_OK) 1466 { 1467 /* shouldn't happen */ 1468 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1469 rcode, mci->mci_state, firstsig); 1470 rcode = EX_SOFTWARE; 1471 } 1472 else if (curhost != NULL && *curhost != '\0') 1473 { 1474 /* try next MX site */ 1475 goto tryhost; 1476 } 1477 } 1478 else if (!clever) 1479 { 1480 /* 1481 ** Format and send message. 1482 */ 1483 1484 putfromline(mci, e); 1485 (*e->e_puthdr)(mci, e->e_header, e); 1486 (*e->e_putbody)(mci, e, NULL); 1487 1488 /* get the exit status */ 1489 rcode = endmailer(mci, e, pv); 1490 } 1491 else 1492 #ifdef SMTP 1493 { 1494 /* 1495 ** Send the MAIL FROM: protocol 1496 */ 1497 1498 rcode = smtpmailfrom(m, mci, e); 1499 if (rcode == EX_OK) 1500 { 1501 register char *t = tobuf; 1502 register int i; 1503 1504 /* send the recipient list */ 1505 tobuf[0] = '\0'; 1506 for (to = tochain; to != NULL; to = to->q_tchain) 1507 { 1508 e->e_to = to->q_paddr; 1509 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1510 { 1511 markfailure(e, to, mci, i); 1512 giveresponse(i, m, mci, ctladdr, xstart, e); 1513 } 1514 else 1515 { 1516 *t++ = ','; 1517 for (p = to->q_paddr; *p; *t++ = *p++) 1518 continue; 1519 *t = '\0'; 1520 } 1521 } 1522 1523 /* now send the data */ 1524 if (tobuf[0] == '\0') 1525 { 1526 rcode = EX_OK; 1527 e->e_to = NULL; 1528 if (bitset(MCIF_CACHED, mci->mci_flags)) 1529 smtprset(m, mci, e); 1530 } 1531 else 1532 { 1533 e->e_to = tobuf + 1; 1534 rcode = smtpdata(m, mci, e); 1535 } 1536 1537 /* now close the connection */ 1538 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1539 smtpquit(m, mci, e); 1540 } 1541 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1542 { 1543 /* try next MX site */ 1544 goto tryhost; 1545 } 1546 } 1547 #else /* not SMTP */ 1548 { 1549 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1550 rcode = EX_CONFIG; 1551 goto give_up; 1552 } 1553 #endif /* SMTP */ 1554 #if NAMED_BIND 1555 if (ConfigLevel < 2) 1556 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1557 #endif 1558 1559 /* arrange a return receipt if requested */ 1560 if (rcode == EX_OK && e->e_receiptto != NULL && 1561 bitnset(M_LOCALMAILER, m->m_flags)) 1562 { 1563 e->e_flags |= EF_SENDRECEIPT; 1564 /* do we want to send back more info? */ 1565 } 1566 1567 /* 1568 ** Do final status disposal. 1569 ** We check for something in tobuf for the SMTP case. 1570 ** If we got a temporary failure, arrange to queue the 1571 ** addressees. 1572 */ 1573 1574 give_up: 1575 if (tobuf[0] != '\0') 1576 giveresponse(rcode, m, mci, ctladdr, xstart, e); 1577 for (to = tochain; to != NULL; to = to->q_tchain) 1578 { 1579 if (rcode != EX_OK) 1580 markfailure(e, to, mci, rcode); 1581 else if (!bitset(QBADADDR|QQUEUEUP, to->q_flags)) 1582 { 1583 to->q_flags |= QSENT; 1584 to->q_statdate = curtime(); 1585 e->e_nsent++; 1586 if (bitnset(M_LOCALMAILER, m->m_flags) && 1587 (e->e_receiptto != NULL || 1588 bitset(QPINGONSUCCESS, to->q_flags))) 1589 { 1590 to->q_flags |= QDELIVERED; 1591 to->q_status = "2.1.5"; 1592 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1593 to->q_paddr); 1594 } 1595 else if (bitset(QPINGONSUCCESS, to->q_flags) && 1596 bitset(QPRIMARY, to->q_flags) && 1597 !bitset(MCIF_DSN, mci->mci_flags)) 1598 { 1599 to->q_flags |= QRELAYED; 1600 fprintf(e->e_xfp, "%s... relayed; expect no further notifications\n", 1601 to->q_paddr); 1602 } 1603 } 1604 } 1605 1606 /* 1607 ** Restore state and return. 1608 */ 1609 1610 #ifdef XDEBUG 1611 { 1612 char wbuf[MAXLINE]; 1613 1614 /* make absolutely certain 0, 1, and 2 are in use */ 1615 sprintf(wbuf, "%s... end of deliver(%s)", 1616 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1617 m->m_name); 1618 checkfd012(wbuf); 1619 } 1620 #endif 1621 1622 errno = 0; 1623 define('g', (char *) NULL, e); 1624 return (rcode); 1625 } 1626 /* 1627 ** MARKFAILURE -- mark a failure on a specific address. 1628 ** 1629 ** Parameters: 1630 ** e -- the envelope we are sending. 1631 ** q -- the address to mark. 1632 ** mci -- mailer connection information. 1633 ** rcode -- the code signifying the particular failure. 1634 ** 1635 ** Returns: 1636 ** none. 1637 ** 1638 ** Side Effects: 1639 ** marks the address (and possibly the envelope) with the 1640 ** failure so that an error will be returned or 1641 ** the message will be queued, as appropriate. 1642 */ 1643 1644 void 1645 markfailure(e, q, mci, rcode) 1646 register ENVELOPE *e; 1647 register ADDRESS *q; 1648 register MCI *mci; 1649 int rcode; 1650 { 1651 char *stat = NULL; 1652 1653 switch (rcode) 1654 { 1655 case EX_OK: 1656 break; 1657 1658 case EX_TEMPFAIL: 1659 case EX_IOERR: 1660 case EX_OSERR: 1661 q->q_flags |= QQUEUEUP; 1662 break; 1663 1664 default: 1665 q->q_flags |= QBADADDR; 1666 break; 1667 } 1668 1669 /* find most specific error code possible */ 1670 if (q->q_status == NULL && mci != NULL) 1671 q->q_status = mci->mci_status; 1672 if (q->q_status == NULL) 1673 q->q_status = e->e_status; 1674 if (q->q_status == NULL) 1675 { 1676 switch (rcode) 1677 { 1678 case EX_USAGE: 1679 stat = "5.5.4"; 1680 break; 1681 1682 case EX_DATAERR: 1683 stat = "5.5.2"; 1684 break; 1685 1686 case EX_NOUSER: 1687 stat = "5.1.1"; 1688 break; 1689 1690 case EX_NOHOST: 1691 stat = "5.1.2"; 1692 break; 1693 1694 case EX_NOINPUT: 1695 case EX_CANTCREAT: 1696 case EX_NOPERM: 1697 stat = "5.3.0"; 1698 break; 1699 1700 case EX_UNAVAILABLE: 1701 case EX_SOFTWARE: 1702 case EX_OSFILE: 1703 case EX_PROTOCOL: 1704 case EX_CONFIG: 1705 stat = "5.5.0"; 1706 break; 1707 1708 case EX_OSERR: 1709 case EX_IOERR: 1710 stat = "4.5.0"; 1711 break; 1712 1713 case EX_TEMPFAIL: 1714 stat = "4.2.0"; 1715 break; 1716 } 1717 if (stat != NULL) 1718 q->q_status = stat; 1719 } 1720 1721 q->q_statdate = curtime(); 1722 if (CurHostName != NULL && CurHostName[0] != '\0') 1723 q->q_statmta = newstr(CurHostName); 1724 if (rcode != EX_OK && q->q_rstatus == NULL) 1725 { 1726 char buf[30]; 1727 1728 (void) sprintf(buf, "%d", rcode); 1729 q->q_rstatus = newstr(buf); 1730 } 1731 } 1732 /* 1733 ** ENDMAILER -- Wait for mailer to terminate. 1734 ** 1735 ** We should never get fatal errors (e.g., segmentation 1736 ** violation), so we report those specially. For other 1737 ** errors, we choose a status message (into statmsg), 1738 ** and if it represents an error, we print it. 1739 ** 1740 ** Parameters: 1741 ** pid -- pid of mailer. 1742 ** e -- the current envelope. 1743 ** pv -- the parameter vector that invoked the mailer 1744 ** (for error messages). 1745 ** 1746 ** Returns: 1747 ** exit code of mailer. 1748 ** 1749 ** Side Effects: 1750 ** none. 1751 */ 1752 1753 int 1754 endmailer(mci, e, pv) 1755 register MCI *mci; 1756 register ENVELOPE *e; 1757 char **pv; 1758 { 1759 int st; 1760 1761 /* close any connections */ 1762 if (mci->mci_in != NULL) 1763 (void) xfclose(mci->mci_in, mci->mci_mailer->m_name, "mci_in"); 1764 if (mci->mci_out != NULL) 1765 (void) xfclose(mci->mci_out, mci->mci_mailer->m_name, "mci_out"); 1766 mci->mci_in = mci->mci_out = NULL; 1767 mci->mci_state = MCIS_CLOSED; 1768 1769 /* in the IPC case there is nothing to wait for */ 1770 if (mci->mci_pid == 0) 1771 return (EX_OK); 1772 1773 /* wait for the mailer process to die and collect status */ 1774 st = waitfor(mci->mci_pid); 1775 if (st == -1) 1776 { 1777 syserr("endmailer %s: wait", pv[0]); 1778 return (EX_SOFTWARE); 1779 } 1780 1781 if (WIFEXITED(st)) 1782 { 1783 /* normal death -- return status */ 1784 return (WEXITSTATUS(st)); 1785 } 1786 1787 /* it died a horrid death */ 1788 syserr("451 mailer %s died with signal %o", 1789 mci->mci_mailer->m_name, st); 1790 1791 /* log the arguments */ 1792 if (pv != NULL && e->e_xfp != NULL) 1793 { 1794 register char **av; 1795 1796 fprintf(e->e_xfp, "Arguments:"); 1797 for (av = pv; *av != NULL; av++) 1798 fprintf(e->e_xfp, " %s", *av); 1799 fprintf(e->e_xfp, "\n"); 1800 } 1801 1802 ExitStat = EX_TEMPFAIL; 1803 return (EX_TEMPFAIL); 1804 } 1805 /* 1806 ** GIVERESPONSE -- Interpret an error response from a mailer 1807 ** 1808 ** Parameters: 1809 ** stat -- the status code from the mailer (high byte 1810 ** only; core dumps must have been taken care of 1811 ** already). 1812 ** m -- the mailer info for this mailer. 1813 ** mci -- the mailer connection info -- can be NULL if the 1814 ** response is given before the connection is made. 1815 ** ctladdr -- the controlling address for the recipient 1816 ** address(es). 1817 ** xstart -- the transaction start time, for computing 1818 ** transaction delays. 1819 ** e -- the current envelope. 1820 ** 1821 ** Returns: 1822 ** none. 1823 ** 1824 ** Side Effects: 1825 ** Errors may be incremented. 1826 ** ExitStat may be set. 1827 */ 1828 1829 void 1830 giveresponse(stat, m, mci, ctladdr, xstart, e) 1831 int stat; 1832 register MAILER *m; 1833 register MCI *mci; 1834 ADDRESS *ctladdr; 1835 time_t xstart; 1836 ENVELOPE *e; 1837 { 1838 register const char *statmsg; 1839 extern char *SysExMsg[]; 1840 register int i; 1841 extern int N_SysEx; 1842 char buf[MAXLINE]; 1843 1844 /* 1845 ** Compute status message from code. 1846 */ 1847 1848 i = stat - EX__BASE; 1849 if (stat == 0) 1850 { 1851 statmsg = "250 Sent"; 1852 if (e->e_statmsg != NULL) 1853 { 1854 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1855 statmsg = buf; 1856 } 1857 } 1858 else if (i < 0 || i > N_SysEx) 1859 { 1860 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1861 stat = EX_UNAVAILABLE; 1862 statmsg = buf; 1863 } 1864 else if (stat == EX_TEMPFAIL) 1865 { 1866 (void) strcpy(buf, SysExMsg[i] + 1); 1867 #if NAMED_BIND 1868 if (h_errno == TRY_AGAIN) 1869 statmsg = errstring(h_errno+E_DNSBASE); 1870 else 1871 #endif 1872 { 1873 if (errno != 0) 1874 statmsg = errstring(errno); 1875 else 1876 { 1877 #ifdef SMTP 1878 statmsg = SmtpError; 1879 #else /* SMTP */ 1880 statmsg = NULL; 1881 #endif /* SMTP */ 1882 } 1883 } 1884 if (statmsg != NULL && statmsg[0] != '\0') 1885 { 1886 (void) strcat(buf, ": "); 1887 (void) strcat(buf, statmsg); 1888 } 1889 statmsg = buf; 1890 } 1891 #if NAMED_BIND 1892 else if (stat == EX_NOHOST && h_errno != 0) 1893 { 1894 statmsg = errstring(h_errno + E_DNSBASE); 1895 (void) sprintf(buf, "%s (%s)", SysExMsg[i] + 1, statmsg); 1896 statmsg = buf; 1897 } 1898 #endif 1899 else 1900 { 1901 statmsg = SysExMsg[i]; 1902 if (*statmsg++ == ':') 1903 { 1904 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1905 statmsg = buf; 1906 } 1907 } 1908 1909 /* 1910 ** Print the message as appropriate 1911 */ 1912 1913 if (stat == EX_OK || stat == EX_TEMPFAIL) 1914 { 1915 extern char MsgBuf[]; 1916 1917 message("%s", &statmsg[4]); 1918 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1919 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1920 } 1921 else 1922 { 1923 char mbuf[8]; 1924 1925 Errors++; 1926 sprintf(mbuf, "%.3s %%s", statmsg); 1927 usrerr(mbuf, &statmsg[4]); 1928 } 1929 1930 /* 1931 ** Final cleanup. 1932 ** Log a record of the transaction. Compute the new 1933 ** ExitStat -- if we already had an error, stick with 1934 ** that. 1935 */ 1936 1937 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1938 logdelivery(m, mci, &statmsg[4], ctladdr, xstart, e); 1939 1940 if (tTd(11, 2)) 1941 printf("giveresponse: stat=%d, e->e_message=%s\n", 1942 stat, e->e_message == NULL ? "<NULL>" : e->e_message); 1943 1944 if (stat != EX_TEMPFAIL) 1945 setstat(stat); 1946 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1947 { 1948 if (e->e_message != NULL) 1949 free(e->e_message); 1950 e->e_message = newstr(&statmsg[4]); 1951 } 1952 errno = 0; 1953 #if NAMED_BIND 1954 h_errno = 0; 1955 #endif 1956 } 1957 /* 1958 ** LOGDELIVERY -- log the delivery in the system log 1959 ** 1960 ** Care is taken to avoid logging lines that are too long, because 1961 ** some versions of syslog have an unfortunate proclivity for core 1962 ** dumping. This is a hack, to be sure, that is at best empirical. 1963 ** 1964 ** Parameters: 1965 ** m -- the mailer info. Can be NULL for initial queue. 1966 ** mci -- the mailer connection info -- can be NULL if the 1967 ** log is occuring when no connection is active. 1968 ** stat -- the message to print for the status. 1969 ** ctladdr -- the controlling address for the to list. 1970 ** xstart -- the transaction start time, used for 1971 ** computing transaction delay. 1972 ** e -- the current envelope. 1973 ** 1974 ** Returns: 1975 ** none 1976 ** 1977 ** Side Effects: 1978 ** none 1979 */ 1980 1981 void 1982 logdelivery(m, mci, stat, ctladdr, xstart, e) 1983 MAILER *m; 1984 register MCI *mci; 1985 const char *stat; 1986 ADDRESS *ctladdr; 1987 time_t xstart; 1988 register ENVELOPE *e; 1989 { 1990 # ifdef LOG 1991 register char *bp; 1992 register char *p; 1993 int l; 1994 char buf[512]; 1995 1996 # if (SYSLOG_BUFSIZE) >= 256 1997 bp = buf; 1998 if (ctladdr != NULL) 1999 { 2000 strcpy(bp, ", ctladdr="); 2001 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 2002 bp += strlen(bp); 2003 if (bitset(QGOODUID, ctladdr->q_flags)) 2004 { 2005 (void) sprintf(bp, " (%d/%d)", 2006 ctladdr->q_uid, ctladdr->q_gid); 2007 bp += strlen(bp); 2008 } 2009 } 2010 2011 sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 2012 bp += strlen(bp); 2013 2014 if (xstart != (time_t) 0) 2015 { 2016 sprintf(bp, ", xdelay=%s", pintvl(curtime() - xstart, TRUE)); 2017 bp += strlen(bp); 2018 } 2019 2020 if (m != NULL) 2021 { 2022 (void) strcpy(bp, ", mailer="); 2023 (void) strcat(bp, m->m_name); 2024 bp += strlen(bp); 2025 } 2026 2027 if (mci != NULL && mci->mci_host != NULL) 2028 { 2029 # ifdef DAEMON 2030 extern SOCKADDR CurHostAddr; 2031 # endif 2032 2033 (void) strcpy(bp, ", relay="); 2034 (void) strcat(bp, mci->mci_host); 2035 2036 # ifdef DAEMON 2037 (void) strcat(bp, " ["); 2038 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 2039 (void) strcat(bp, "]"); 2040 # endif 2041 } 2042 else if (strcmp(stat, "queued") != 0) 2043 { 2044 char *p = macvalue('h', e); 2045 2046 if (p != NULL && p[0] != '\0') 2047 { 2048 (void) strcpy(bp, ", relay="); 2049 (void) strcat(bp, p); 2050 } 2051 } 2052 bp += strlen(bp); 2053 2054 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 2055 #if (STATLEN) < 63 2056 # undef STATLEN 2057 # define STATLEN 63 2058 #endif 2059 #if (STATLEN) > 203 2060 # undef STATLEN 2061 # define STATLEN 203 2062 #endif 2063 2064 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 2065 { 2066 /* desperation move -- truncate data */ 2067 bp = buf + sizeof buf - ((STATLEN) + 17); 2068 strcpy(bp, "..."); 2069 bp += 3; 2070 } 2071 2072 (void) strcpy(bp, ", stat="); 2073 bp += strlen(bp); 2074 2075 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 2076 2077 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 2078 p = e->e_to; 2079 while (strlen(p) >= (SIZE_T) l) 2080 { 2081 register char *q = strchr(p + l, ','); 2082 2083 if (q == NULL) 2084 break; 2085 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 2086 e->e_id, ++q - p, p, buf); 2087 p = q; 2088 } 2089 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 2090 2091 # else /* we have a very short log buffer size */ 2092 2093 l = SYSLOG_BUFSIZE - 85; 2094 p = e->e_to; 2095 while (strlen(p) >= l) 2096 { 2097 register char *q = strchr(p + l, ','); 2098 2099 if (q == NULL) 2100 break; 2101 syslog(LOG_INFO, "%s: to=%.*s [more]", 2102 e->e_id, ++q - p, p); 2103 p = q; 2104 } 2105 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 2106 2107 if (ctladdr != NULL) 2108 { 2109 bp = buf; 2110 strcpy(buf, "ctladdr="); 2111 bp += strlen(buf); 2112 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 2113 bp += strlen(buf); 2114 if (bitset(QGOODUID, ctladdr->q_flags)) 2115 { 2116 (void) sprintf(bp, " (%d/%d)", 2117 ctladdr->q_uid, ctladdr->q_gid); 2118 bp += strlen(bp); 2119 } 2120 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 2121 } 2122 bp = buf; 2123 sprintf(bp, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 2124 bp += strlen(bp); 2125 if (xstart != (time_t) 0) 2126 { 2127 sprintf(bp, ", xdelay=%s", pintvl(curtime() - xstart, TRUE)); 2128 bp += strlen(bp); 2129 } 2130 2131 if (m != NULL) 2132 { 2133 sprintf(bp, ", mailer=%s", m->m_name); 2134 bp += strlen(bp); 2135 } 2136 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 2137 2138 buf[0] = '\0'; 2139 if (mci != NULL && mci->mci_host != NULL) 2140 { 2141 # ifdef DAEMON 2142 extern SOCKADDR CurHostAddr; 2143 # endif 2144 2145 sprintf(buf, "relay=%s", mci->mci_host); 2146 2147 # ifdef DAEMON 2148 (void) strcat(buf, " ["); 2149 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 2150 (void) strcat(buf, "]"); 2151 # endif 2152 } 2153 else if (strcmp(stat, "queued") != 0) 2154 { 2155 char *p = macvalue('h', e); 2156 2157 if (p != NULL && p[0] != '\0') 2158 sprintf(buf, "relay=%s", p); 2159 } 2160 if (buf[0] != '\0') 2161 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 2162 2163 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 2164 # endif /* short log buffer */ 2165 # endif /* LOG */ 2166 } 2167 /* 2168 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 2169 ** 2170 ** This can be made an arbitrary message separator by changing $l 2171 ** 2172 ** One of the ugliest hacks seen by human eyes is contained herein: 2173 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 2174 ** does a well-meaning programmer such as myself have to deal with 2175 ** this kind of antique garbage???? 2176 ** 2177 ** Parameters: 2178 ** mci -- the connection information. 2179 ** e -- the envelope. 2180 ** 2181 ** Returns: 2182 ** none 2183 ** 2184 ** Side Effects: 2185 ** outputs some text to fp. 2186 */ 2187 2188 void 2189 putfromline(mci, e) 2190 register MCI *mci; 2191 ENVELOPE *e; 2192 { 2193 char *template = "\201l\n"; 2194 char buf[MAXLINE]; 2195 2196 if (bitnset(M_NHDR, mci->mci_mailer->m_flags)) 2197 return; 2198 2199 # ifdef UGLYUUCP 2200 if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags)) 2201 { 2202 char *bang; 2203 char xbuf[MAXLINE]; 2204 2205 expand("\201g", buf, sizeof buf, e); 2206 bang = strchr(buf, '!'); 2207 if (bang == NULL) 2208 { 2209 errno = 0; 2210 syserr("554 No ! in UUCP From address! (%s given)", buf); 2211 } 2212 else 2213 { 2214 *bang++ = '\0'; 2215 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 2216 template = xbuf; 2217 } 2218 } 2219 # endif /* UGLYUUCP */ 2220 expand(template, buf, sizeof buf, e); 2221 putxline(buf, mci, PXLF_NOTHINGSPECIAL); 2222 } 2223 /* 2224 ** PUTBODY -- put the body of a message. 2225 ** 2226 ** Parameters: 2227 ** mci -- the connection information. 2228 ** e -- the envelope to put out. 2229 ** separator -- if non-NULL, a message separator that must 2230 ** not be permitted in the resulting message. 2231 ** 2232 ** Returns: 2233 ** none. 2234 ** 2235 ** Side Effects: 2236 ** The message is written onto fp. 2237 */ 2238 2239 /* values for output state variable */ 2240 #define OS_HEAD 0 /* at beginning of line */ 2241 #define OS_CR 1 /* read a carriage return */ 2242 #define OS_INLINE 2 /* putting rest of line */ 2243 2244 void 2245 putbody(mci, e, separator) 2246 register MCI *mci; 2247 register ENVELOPE *e; 2248 char *separator; 2249 { 2250 char buf[MAXLINE]; 2251 2252 /* 2253 ** Output the body of the message 2254 */ 2255 2256 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags)) 2257 { 2258 char *df = queuename(e, 'd'); 2259 2260 e->e_dfp = fopen(df, "r"); 2261 if (e->e_dfp == NULL) 2262 syserr("putbody: Cannot open %s for %s from %s", 2263 df, e->e_to, e->e_from.q_paddr); 2264 } 2265 if (e->e_dfp == NULL) 2266 { 2267 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2268 { 2269 putline("", mci); 2270 mci->mci_flags &= ~MCIF_INHEADER; 2271 } 2272 putline("<<< No Message Collected >>>", mci); 2273 goto endofmessage; 2274 } 2275 if (e->e_dfino == (ino_t) 0) 2276 { 2277 struct stat stbuf; 2278 2279 if (fstat(fileno(e->e_dfp), &stbuf) < 0) 2280 e->e_dfino = -1; 2281 else 2282 { 2283 e->e_dfdev = stbuf.st_dev; 2284 e->e_dfino = stbuf.st_ino; 2285 } 2286 } 2287 rewind(e->e_dfp); 2288 2289 #if MIME8TO7 2290 if (bitset(MCIF_CVT8TO7, mci->mci_flags)) 2291 { 2292 char *boundaries[MAXMIMENESTING + 1]; 2293 2294 /* 2295 ** Do 8 to 7 bit MIME conversion. 2296 */ 2297 2298 /* make sure it looks like a MIME message */ 2299 if (hvalue("MIME-Version", e->e_header) == NULL) 2300 putline("MIME-Version: 1.0", mci); 2301 2302 if (hvalue("Content-Type", e->e_header) == NULL) 2303 { 2304 sprintf(buf, "Content-Type: text/plain; charset=%s", 2305 defcharset(e)); 2306 putline(buf, mci); 2307 } 2308 2309 /* now do the hard work */ 2310 boundaries[0] = NULL; 2311 mime8to7(mci, e->e_header, e, boundaries, M87F_OUTER); 2312 } 2313 else 2314 #endif 2315 { 2316 int ostate; 2317 register char *bp; 2318 register char *pbp; 2319 register int c; 2320 int padc; 2321 char *buflim; 2322 int pos = 0; 2323 char peekbuf[10]; 2324 2325 /* we can pass it through unmodified */ 2326 if (bitset(MCIF_INHEADER, mci->mci_flags)) 2327 { 2328 putline("", mci); 2329 mci->mci_flags &= ~MCIF_INHEADER; 2330 } 2331 2332 /* determine end of buffer; allow for short mailer lines */ 2333 buflim = &buf[sizeof buf - 1]; 2334 if (mci->mci_mailer->m_linelimit > 0 && 2335 mci->mci_mailer->m_linelimit < sizeof buf - 1) 2336 buflim = &buf[mci->mci_mailer->m_linelimit - 1]; 2337 2338 /* copy temp file to output with mapping */ 2339 ostate = OS_HEAD; 2340 bp = buf; 2341 pbp = peekbuf; 2342 while (!ferror(mci->mci_out)) 2343 { 2344 register char *xp; 2345 2346 if (pbp > peekbuf) 2347 c = *--pbp; 2348 else if ((c = getc(e->e_dfp)) == EOF) 2349 break; 2350 if (bitset(MCIF_7BIT, mci->mci_flags)) 2351 c &= 0x7f; 2352 switch (ostate) 2353 { 2354 case OS_HEAD: 2355 if (c != '\r' && c != '\n' && bp < buflim) 2356 { 2357 *bp++ = c; 2358 break; 2359 } 2360 2361 /* check beginning of line for special cases */ 2362 *bp = '\0'; 2363 pos = 0; 2364 padc = EOF; 2365 if (buf[0] == 'F' && 2366 bitnset(M_ESCFROM, mci->mci_mailer->m_flags) && 2367 strncmp(buf, "From ", 5) == 0) 2368 { 2369 padc = '>'; 2370 } 2371 if (buf[0] == '-' && buf[1] == '-' && 2372 separator != NULL) 2373 { 2374 /* possible separator */ 2375 int sl = strlen(separator); 2376 2377 if (strncmp(&buf[2], separator, sl) == 0) 2378 padc = ' '; 2379 } 2380 if (buf[0] == '.' && 2381 bitnset(M_XDOT, mci->mci_mailer->m_flags)) 2382 { 2383 padc = '.'; 2384 } 2385 2386 /* now copy out saved line */ 2387 if (TrafficLogFile != NULL) 2388 { 2389 fprintf(TrafficLogFile, "%05d >>> ", getpid()); 2390 if (padc != EOF) 2391 putc(padc, TrafficLogFile); 2392 for (xp = buf; xp < bp; xp++) 2393 putc(*xp, TrafficLogFile); 2394 if (c == '\n') 2395 fputs(mci->mci_mailer->m_eol, 2396 TrafficLogFile); 2397 } 2398 if (padc != EOF) 2399 { 2400 putc(padc, mci->mci_out); 2401 pos++; 2402 } 2403 for (xp = buf; xp < bp; xp++) 2404 putc(*xp, mci->mci_out); 2405 if (c == '\n') 2406 { 2407 fputs(mci->mci_mailer->m_eol, 2408 mci->mci_out); 2409 pos = 0; 2410 } 2411 else 2412 { 2413 pos += bp - buf; 2414 if (c != '\r') 2415 *pbp++ = c; 2416 } 2417 bp = buf; 2418 2419 /* determine next state */ 2420 if (c == '\n') 2421 ostate = OS_HEAD; 2422 else if (c == '\r') 2423 ostate = OS_CR; 2424 else 2425 ostate = OS_INLINE; 2426 continue; 2427 2428 case OS_CR: 2429 if (c == '\n') 2430 { 2431 /* got CRLF */ 2432 fputs(mci->mci_mailer->m_eol, mci->mci_out); 2433 if (TrafficLogFile != NULL) 2434 { 2435 fputs(mci->mci_mailer->m_eol, 2436 TrafficLogFile); 2437 } 2438 ostate = OS_HEAD; 2439 continue; 2440 } 2441 2442 /* had a naked carriage return */ 2443 *pbp++ = c; 2444 c = '\r'; 2445 goto putch; 2446 2447 case OS_INLINE: 2448 if (c == '\r') 2449 { 2450 ostate = OS_CR; 2451 continue; 2452 } 2453 putch: 2454 if (mci->mci_mailer->m_linelimit > 0 && 2455 pos > mci->mci_mailer->m_linelimit && 2456 c != '\n') 2457 { 2458 putc('!', mci->mci_out); 2459 fputs(mci->mci_mailer->m_eol, mci->mci_out); 2460 if (TrafficLogFile != NULL) 2461 { 2462 fprintf(TrafficLogFile, "!%s", 2463 mci->mci_mailer->m_eol); 2464 } 2465 ostate = OS_HEAD; 2466 *pbp++ = c; 2467 continue; 2468 } 2469 if (TrafficLogFile != NULL) 2470 putc(c, TrafficLogFile); 2471 putc(c, mci->mci_out); 2472 pos++; 2473 ostate = c == '\n' ? OS_HEAD : OS_INLINE; 2474 break; 2475 } 2476 } 2477 } 2478 2479 if (ferror(e->e_dfp)) 2480 { 2481 syserr("putbody: df%s: read error", e->e_id); 2482 ExitStat = EX_IOERR; 2483 } 2484 2485 endofmessage: 2486 /* some mailers want extra blank line at end of message */ 2487 if (bitnset(M_BLANKEND, mci->mci_mailer->m_flags) && 2488 buf[0] != '\0' && buf[0] != '\n') 2489 putline("", mci); 2490 2491 (void) fflush(mci->mci_out); 2492 if (ferror(mci->mci_out) && errno != EPIPE) 2493 { 2494 syserr("putbody: write error"); 2495 ExitStat = EX_IOERR; 2496 } 2497 errno = 0; 2498 } 2499 /* 2500 ** MAILFILE -- Send a message to a file. 2501 ** 2502 ** If the file has the setuid/setgid bits set, but NO execute 2503 ** bits, sendmail will try to become the owner of that file 2504 ** rather than the real user. Obviously, this only works if 2505 ** sendmail runs as root. 2506 ** 2507 ** This could be done as a subordinate mailer, except that it 2508 ** is used implicitly to save messages in ~/dead.letter. We 2509 ** view this as being sufficiently important as to include it 2510 ** here. For example, if the system is dying, we shouldn't have 2511 ** to create another process plus some pipes to save the message. 2512 ** 2513 ** Parameters: 2514 ** filename -- the name of the file to send to. 2515 ** ctladdr -- the controlling address header -- includes 2516 ** the userid/groupid to be when sending. 2517 ** sfflags -- flags for opening. 2518 ** e -- the current envelope. 2519 ** 2520 ** Returns: 2521 ** The exit code associated with the operation. 2522 ** 2523 ** Side Effects: 2524 ** none. 2525 */ 2526 2527 int 2528 mailfile(filename, ctladdr, sfflags, e) 2529 char *filename; 2530 ADDRESS *ctladdr; 2531 int sfflags; 2532 register ENVELOPE *e; 2533 { 2534 register FILE *f; 2535 register int pid = -1; 2536 int mode; 2537 2538 if (tTd(11, 1)) 2539 { 2540 printf("mailfile %s\n ctladdr=", filename); 2541 printaddr(ctladdr, FALSE); 2542 } 2543 2544 if (e->e_xfp != NULL) 2545 fflush(e->e_xfp); 2546 2547 /* 2548 ** Fork so we can change permissions here. 2549 ** Note that we MUST use fork, not vfork, because of 2550 ** the complications of calling subroutines, etc. 2551 */ 2552 2553 DOFORK(fork); 2554 2555 if (pid < 0) 2556 return (EX_OSERR); 2557 else if (pid == 0) 2558 { 2559 /* child -- actually write to file */ 2560 struct stat stb; 2561 struct stat fsb; 2562 MCI mcibuf; 2563 int oflags = O_WRONLY|O_APPEND; 2564 2565 if (e->e_lockfp != NULL) 2566 (void) close(fileno(e->e_lockfp)); 2567 2568 (void) setsignal(SIGINT, SIG_DFL); 2569 (void) setsignal(SIGHUP, SIG_DFL); 2570 (void) setsignal(SIGTERM, SIG_DFL); 2571 (void) umask(OldUmask); 2572 e->e_to = filename; 2573 ExitStat = EX_OK; 2574 2575 #ifdef HASLSTAT 2576 if ((SafeFileEnv != NULL ? lstat(filename, &stb) 2577 : stat(filename, &stb)) < 0) 2578 #else 2579 if (stat(filename, &stb) < 0) 2580 #endif 2581 { 2582 stb.st_mode = FileMode; 2583 oflags |= O_CREAT|O_EXCL; 2584 } 2585 else if (bitset(0111, stb.st_mode) || stb.st_nlink != 1 || 2586 (SafeFileEnv != NULL && !S_ISREG(stb.st_mode))) 2587 exit(EX_CANTCREAT); 2588 mode = stb.st_mode; 2589 2590 /* limit the errors to those actually caused in the child */ 2591 errno = 0; 2592 ExitStat = EX_OK; 2593 2594 if (ctladdr != NULL || bitset(SFF_RUNASREALUID, sfflags)) 2595 { 2596 /* ignore setuid and setgid bits */ 2597 mode &= ~(S_ISGID|S_ISUID); 2598 } 2599 2600 /* we have to open the dfile BEFORE setuid */ 2601 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags)) 2602 { 2603 char *df = queuename(e, 'd'); 2604 2605 e->e_dfp = fopen(df, "r"); 2606 if (e->e_dfp == NULL) 2607 { 2608 syserr("mailfile: Cannot open %s for %s from %s", 2609 df, e->e_to, e->e_from.q_paddr); 2610 } 2611 } 2612 2613 if (SafeFileEnv != NULL && SafeFileEnv[0] != '\0') 2614 { 2615 int i; 2616 2617 if (chroot(SafeFileEnv) < 0) 2618 { 2619 syserr("mailfile: Cannot chroot(%s)", 2620 SafeFileEnv); 2621 exit(EX_CANTCREAT); 2622 } 2623 i = strlen(SafeFileEnv); 2624 if (strncmp(SafeFileEnv, filename, i) == 0) 2625 filename += i; 2626 } 2627 if (chdir("/") < 0) 2628 syserr("mailfile: cannot chdir(/)"); 2629 2630 /* select a new user to run as */ 2631 if (!bitset(SFF_RUNASREALUID, sfflags)) 2632 { 2633 if (bitset(S_ISUID, mode)) 2634 { 2635 RealUserName = NULL; 2636 RealUid = stb.st_uid; 2637 } 2638 else if (ctladdr != NULL && ctladdr->q_uid != 0) 2639 { 2640 if (ctladdr->q_ruser != NULL) 2641 RealUserName = ctladdr->q_ruser; 2642 else 2643 RealUserName = ctladdr->q_user; 2644 RealUid = ctladdr->q_uid; 2645 } 2646 else if (FileMailer != NULL && FileMailer->m_uid != 0) 2647 { 2648 RealUserName = DefUser; 2649 RealUid = FileMailer->m_uid; 2650 } 2651 else 2652 { 2653 RealUserName = DefUser; 2654 RealUid = DefUid; 2655 } 2656 2657 /* select a new group to run as */ 2658 if (bitset(S_ISGID, mode)) 2659 RealGid = stb.st_gid; 2660 else if (ctladdr != NULL && ctladdr->q_uid != 0) 2661 RealGid = ctladdr->q_gid; 2662 else if (FileMailer != NULL && FileMailer->m_gid != 0) 2663 RealGid = FileMailer->m_gid; 2664 else 2665 RealGid = DefGid; 2666 } 2667 2668 /* last ditch */ 2669 if (!bitset(SFF_ROOTOK, sfflags)) 2670 { 2671 if (RealUid == 0) 2672 RealUid = DefUid; 2673 if (RealGid == 0) 2674 RealGid = DefGid; 2675 } 2676 2677 /* now set the group and user ids */ 2678 if (RealUserName != NULL) 2679 (void) initgroups(RealUserName, RealGid); 2680 else 2681 (void) setgid(RealGid); 2682 (void) setuid(RealUid); 2683 2684 sfflags |= SFF_NOPATHCHECK; 2685 sfflags &= ~SFF_OPENASROOT; 2686 f = safefopen(filename, oflags, FileMode, sfflags); 2687 if (f == NULL) 2688 { 2689 message("554 cannot open: %s", errstring(errno)); 2690 exit(EX_CANTCREAT); 2691 } 2692 2693 bzero(&mcibuf, sizeof mcibuf); 2694 mcibuf.mci_mailer = FileMailer; 2695 mcibuf.mci_out = f; 2696 if (bitnset(M_7BITS, FileMailer->m_flags)) 2697 mcibuf.mci_flags |= MCIF_7BIT; 2698 2699 putfromline(&mcibuf, e); 2700 (*e->e_puthdr)(&mcibuf, e->e_header, e); 2701 (*e->e_putbody)(&mcibuf, e, NULL); 2702 putline("\n", &mcibuf); 2703 if (ferror(f)) 2704 { 2705 message("451 I/O error: %s", errstring(errno)); 2706 setstat(EX_IOERR); 2707 } 2708 (void) xfclose(f, "mailfile", filename); 2709 (void) fflush(stdout); 2710 2711 /* reset ISUID & ISGID bits for paranoid systems */ 2712 (void) chmod(filename, (int) stb.st_mode); 2713 exit(ExitStat); 2714 /*NOTREACHED*/ 2715 } 2716 else 2717 { 2718 /* parent -- wait for exit status */ 2719 int st; 2720 2721 st = waitfor(pid); 2722 if (WIFEXITED(st)) 2723 return (WEXITSTATUS(st)); 2724 else 2725 { 2726 syserr("child died on signal %d", st); 2727 return (EX_UNAVAILABLE); 2728 } 2729 /*NOTREACHED*/ 2730 } 2731 } 2732 /* 2733 ** HOSTSIGNATURE -- return the "signature" for a host. 2734 ** 2735 ** The signature describes how we are going to send this -- it 2736 ** can be just the hostname (for non-Internet hosts) or can be 2737 ** an ordered list of MX hosts. 2738 ** 2739 ** Parameters: 2740 ** m -- the mailer describing this host. 2741 ** host -- the host name. 2742 ** e -- the current envelope. 2743 ** 2744 ** Returns: 2745 ** The signature for this host. 2746 ** 2747 ** Side Effects: 2748 ** Can tweak the symbol table. 2749 */ 2750 2751 char * 2752 hostsignature(m, host, e) 2753 register MAILER *m; 2754 char *host; 2755 ENVELOPE *e; 2756 { 2757 register char *p; 2758 register STAB *s; 2759 int i; 2760 int len; 2761 #if NAMED_BIND 2762 int nmx; 2763 auto int rcode; 2764 char *hp; 2765 char *endp; 2766 int oldoptions = _res.options; 2767 char *mxhosts[MAXMXHOSTS + 1]; 2768 #endif 2769 2770 /* 2771 ** Check to see if this uses IPC -- if not, it can't have MX records. 2772 */ 2773 2774 p = m->m_mailer; 2775 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2776 { 2777 /* just an ordinary mailer */ 2778 return host; 2779 } 2780 2781 /* 2782 ** Look it up in the symbol table. 2783 */ 2784 2785 s = stab(host, ST_HOSTSIG, ST_ENTER); 2786 if (s->s_hostsig != NULL) 2787 return s->s_hostsig; 2788 2789 /* 2790 ** Not already there -- create a signature. 2791 */ 2792 2793 #if NAMED_BIND 2794 if (ConfigLevel < 2) 2795 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2796 2797 for (hp = host; hp != NULL; hp = endp) 2798 { 2799 endp = strchr(hp, ':'); 2800 if (endp != NULL) 2801 *endp = '\0'; 2802 2803 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2804 2805 if (nmx <= 0) 2806 { 2807 register MCI *mci; 2808 2809 /* update the connection info for this host */ 2810 mci = mci_get(hp, m); 2811 mci->mci_exitstat = rcode; 2812 mci->mci_errno = errno; 2813 mci->mci_herrno = h_errno; 2814 2815 /* and return the original host name as the signature */ 2816 nmx = 1; 2817 mxhosts[0] = hp; 2818 } 2819 2820 len = 0; 2821 for (i = 0; i < nmx; i++) 2822 { 2823 len += strlen(mxhosts[i]) + 1; 2824 } 2825 if (s->s_hostsig != NULL) 2826 len += strlen(s->s_hostsig) + 1; 2827 p = xalloc(len); 2828 if (s->s_hostsig != NULL) 2829 { 2830 (void) strcpy(p, s->s_hostsig); 2831 free(s->s_hostsig); 2832 s->s_hostsig = p; 2833 p += strlen(p); 2834 *p++ = ':'; 2835 } 2836 else 2837 s->s_hostsig = p; 2838 for (i = 0; i < nmx; i++) 2839 { 2840 if (i != 0) 2841 *p++ = ':'; 2842 strcpy(p, mxhosts[i]); 2843 p += strlen(p); 2844 } 2845 if (endp != NULL) 2846 *endp++ = ':'; 2847 } 2848 makelower(s->s_hostsig); 2849 if (ConfigLevel < 2) 2850 _res.options = oldoptions; 2851 #else 2852 /* not using BIND -- the signature is just the host name */ 2853 s->s_hostsig = host; 2854 #endif 2855 if (tTd(17, 1)) 2856 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2857 return s->s_hostsig; 2858 } 2859