1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988 Regents of the University of California. 4 * All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)deliver.c 6.7 (Berkeley) 01/10/93"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <sys/signal.h> 15 #include <sys/stat.h> 16 #include <netdb.h> 17 #include <fcntl.h> 18 #include <errno.h> 19 #ifdef NAMED_BIND 20 #include <arpa/nameser.h> 21 #include <resolv.h> 22 #endif 23 24 /* 25 ** DELIVER -- Deliver a message to a list of addresses. 26 ** 27 ** This routine delivers to everyone on the same host as the 28 ** user on the head of the list. It is clever about mailers 29 ** that don't handle multiple users. It is NOT guaranteed 30 ** that it will deliver to all these addresses however -- so 31 ** deliver should be called once for each address on the 32 ** list. 33 ** 34 ** Parameters: 35 ** e -- the envelope to deliver. 36 ** firstto -- head of the address list to deliver to. 37 ** 38 ** Returns: 39 ** zero -- successfully delivered. 40 ** else -- some failure, see ExitStat for more info. 41 ** 42 ** Side Effects: 43 ** The standard input is passed off to someone. 44 */ 45 46 deliver(e, firstto) 47 register ENVELOPE *e; 48 ADDRESS *firstto; 49 { 50 char *host; /* host being sent to */ 51 char *user; /* user being sent to */ 52 char **pvp; 53 register char **mvp; 54 register char *p; 55 register MAILER *m; /* mailer for this recipient */ 56 ADDRESS *ctladdr; 57 register MCI *mci; 58 register ADDRESS *to = firstto; 59 bool clever = FALSE; /* running user smtp to this mailer */ 60 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 61 int rcode; /* response code */ 62 char *from; /* pointer to from person */ 63 char *firstsig; /* signature of firstto */ 64 char *pv[MAXPV+1]; 65 char tobuf[MAXLINE-50]; /* text line of to people */ 66 char buf[MAXNAME]; 67 char tfrombuf[MAXNAME]; /* translated from person */ 68 char rpathbuf[MAXNAME]; /* translated return path */ 69 extern int checkcompat(); 70 extern ADDRESS *getctladdr(); 71 extern char *remotename(); 72 extern MCI *openmailer(); 73 extern char *hostsignature(); 74 75 errno = 0; 76 if (bitset(QDONTSEND, to->q_flags)) 77 return (0); 78 79 #ifdef NAMED_BIND 80 /* unless interactive, try twice, over a minute */ 81 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) { 82 _res.retrans = 30; 83 _res.retry = 2; 84 } 85 #endif 86 87 m = to->q_mailer; 88 host = to->q_host; 89 90 if (tTd(10, 1)) 91 printf("\n--deliver, mailer=%d, host=`%s', first user=`%s'\n", 92 m->m_mno, host, to->q_user); 93 94 /* 95 ** If this mailer is expensive, and if we don't want to make 96 ** connections now, just mark these addresses and return. 97 ** This is useful if we want to batch connections to 98 ** reduce load. This will cause the messages to be 99 ** queued up, and a daemon will come along to send the 100 ** messages later. 101 ** This should be on a per-mailer basis. 102 */ 103 104 if (NoConnect && !QueueRun && bitnset(M_EXPENSIVE, m->m_flags) && 105 !Verbose) 106 { 107 for (; to != NULL; to = to->q_next) 108 { 109 if (bitset(QDONTSEND, to->q_flags) || to->q_mailer != m) 110 continue; 111 to->q_flags |= QQUEUEUP|QDONTSEND; 112 e->e_to = to->q_paddr; 113 message(Arpa_Info, "queued"); 114 if (LogLevel > 4) 115 logdelivery("queued", e); 116 } 117 e->e_to = NULL; 118 return (0); 119 } 120 121 /* 122 ** Do initial argv setup. 123 ** Insert the mailer name. Notice that $x expansion is 124 ** NOT done on the mailer name. Then, if the mailer has 125 ** a picky -f flag, we insert it as appropriate. This 126 ** code does not check for 'pv' overflow; this places a 127 ** manifest lower limit of 4 for MAXPV. 128 ** The from address rewrite is expected to make 129 ** the address relative to the other end. 130 */ 131 132 /* rewrite from address, using rewriting rules */ 133 (void) strcpy(rpathbuf, remotename(e->e_returnpath, m, TRUE, TRUE, e)); 134 if (e->e_returnpath == e->e_sender) 135 { 136 from = rpathbuf; 137 } 138 else 139 { 140 (void) strcpy(tfrombuf, remotename(e->e_sender, m, TRUE, TRUE, e)); 141 from = tfrombuf; 142 } 143 144 define('f', e->e_returnpath, e); /* raw return path */ 145 define('<', rpathbuf, e); /* translated return path */ 146 define('g', from, e); /* translated sender */ 147 define('h', host, e); /* to host */ 148 Errors = 0; 149 pvp = pv; 150 *pvp++ = m->m_argv[0]; 151 152 /* insert -f or -r flag as appropriate */ 153 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 154 { 155 if (bitnset(M_FOPT, m->m_flags)) 156 *pvp++ = "-f"; 157 else 158 *pvp++ = "-r"; 159 *pvp++ = newstr(rpathbuf); 160 } 161 162 /* 163 ** Append the other fixed parts of the argv. These run 164 ** up to the first entry containing "$u". There can only 165 ** be one of these, and there are only a few more slots 166 ** in the pv after it. 167 */ 168 169 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 170 { 171 while ((p = strchr(p, '\001')) != NULL) 172 if (*++p == 'u') 173 break; 174 if (p != NULL) 175 break; 176 177 /* this entry is safe -- go ahead and process it */ 178 expand(*mvp, buf, &buf[sizeof buf - 1], e); 179 *pvp++ = newstr(buf); 180 if (pvp >= &pv[MAXPV - 3]) 181 { 182 syserr("Too many parameters to %s before $u", pv[0]); 183 return (-1); 184 } 185 } 186 187 /* 188 ** If we have no substitution for the user name in the argument 189 ** list, we know that we must supply the names otherwise -- and 190 ** SMTP is the answer!! 191 */ 192 193 if (*mvp == NULL) 194 { 195 /* running SMTP */ 196 # ifdef SMTP 197 clever = TRUE; 198 *pvp = NULL; 199 # else /* SMTP */ 200 /* oops! we don't implement SMTP */ 201 syserr("SMTP style mailer"); 202 return (EX_SOFTWARE); 203 # endif /* SMTP */ 204 } 205 206 /* 207 ** At this point *mvp points to the argument with $u. We 208 ** run through our address list and append all the addresses 209 ** we can. If we run out of space, do not fret! We can 210 ** always send another copy later. 211 */ 212 213 tobuf[0] = '\0'; 214 e->e_to = tobuf; 215 ctladdr = NULL; 216 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 217 for (; to != NULL; to = to->q_next) 218 { 219 /* avoid sending multiple recipients to dumb mailers */ 220 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 221 break; 222 223 /* if already sent or not for this host, don't send */ 224 if (bitset(QDONTSEND, to->q_flags) || 225 to->q_mailer != firstto->q_mailer || 226 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 227 continue; 228 229 /* avoid overflowing tobuf */ 230 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 231 break; 232 233 if (tTd(10, 1)) 234 { 235 printf("\nsend to "); 236 printaddr(to, FALSE); 237 } 238 239 /* compute effective uid/gid when sending */ 240 if (to->q_mailer == ProgMailer) 241 ctladdr = getctladdr(to); 242 243 user = to->q_user; 244 e->e_to = to->q_paddr; 245 to->q_flags |= QDONTSEND; 246 247 /* 248 ** Check to see that these people are allowed to 249 ** talk to each other. 250 */ 251 252 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 253 { 254 NoReturn = TRUE; 255 usrerr("Message is too large; %ld bytes max", m->m_maxsize); 256 giveresponse(EX_UNAVAILABLE, m, e); 257 continue; 258 } 259 rcode = checkcompat(to, e); 260 if (rcode != EX_OK) 261 { 262 giveresponse(rcode, m, e); 263 continue; 264 } 265 266 /* 267 ** Strip quote bits from names if the mailer is dumb 268 ** about them. 269 */ 270 271 if (bitnset(M_STRIPQ, m->m_flags)) 272 { 273 stripquotes(user); 274 stripquotes(host); 275 } 276 277 /* hack attack -- delivermail compatibility */ 278 if (m == ProgMailer && *user == '|') 279 user++; 280 281 /* 282 ** If an error message has already been given, don't 283 ** bother to send to this address. 284 ** 285 ** >>>>>>>>>> This clause assumes that the local mailer 286 ** >> NOTE >> cannot do any further aliasing; that 287 ** >>>>>>>>>> function is subsumed by sendmail. 288 */ 289 290 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 291 continue; 292 293 /* save statistics.... */ 294 markstats(e, to); 295 296 /* 297 ** See if this user name is "special". 298 ** If the user name has a slash in it, assume that this 299 ** is a file -- send it off without further ado. Note 300 ** that this type of addresses is not processed along 301 ** with the others, so we fudge on the To person. 302 */ 303 304 if (m == FileMailer) 305 { 306 rcode = mailfile(user, getctladdr(to), e); 307 giveresponse(rcode, m, e); 308 if (rcode == EX_OK) 309 to->q_flags |= QSENT; 310 continue; 311 } 312 313 /* 314 ** Address is verified -- add this user to mailer 315 ** argv, and add it to the print list of recipients. 316 */ 317 318 /* link together the chain of recipients */ 319 to->q_tchain = tochain; 320 tochain = to; 321 322 /* create list of users for error messages */ 323 (void) strcat(tobuf, ","); 324 (void) strcat(tobuf, to->q_paddr); 325 define('u', user, e); /* to user */ 326 define('z', to->q_home, e); /* user's home */ 327 328 /* 329 ** Expand out this user into argument list. 330 */ 331 332 if (!clever) 333 { 334 expand(*mvp, buf, &buf[sizeof buf - 1], e); 335 *pvp++ = newstr(buf); 336 if (pvp >= &pv[MAXPV - 2]) 337 { 338 /* allow some space for trailing parms */ 339 break; 340 } 341 } 342 } 343 344 /* see if any addresses still exist */ 345 if (tobuf[0] == '\0') 346 { 347 define('g', (char *) NULL, e); 348 define('<', (char *) NULL, e); 349 return (0); 350 } 351 352 /* print out messages as full list */ 353 e->e_to = tobuf + 1; 354 355 /* 356 ** Fill out any parameters after the $u parameter. 357 */ 358 359 while (!clever && *++mvp != NULL) 360 { 361 expand(*mvp, buf, &buf[sizeof buf - 1], e); 362 *pvp++ = newstr(buf); 363 if (pvp >= &pv[MAXPV]) 364 syserr("deliver: pv overflow after $u for %s", pv[0]); 365 } 366 *pvp++ = NULL; 367 368 /* 369 ** Call the mailer. 370 ** The argument vector gets built, pipes 371 ** are created as necessary, and we fork & exec as 372 ** appropriate. 373 ** If we are running SMTP, we just need to clean up. 374 */ 375 376 if (ctladdr == NULL) 377 ctladdr = &e->e_from; 378 #ifdef NAMED_BIND 379 if (ConfigLevel < 2) 380 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 381 #endif 382 mci = openmailer(m, pv, ctladdr, clever, e); 383 if (mci == NULL) 384 { 385 /* catastrophic error */ 386 rcode = -1; 387 goto give_up; 388 } 389 else if (mci->mci_state != MCIS_OPEN) 390 { 391 /* couldn't open the mailer */ 392 rcode = mci->mci_exitstat; 393 errno = mci->mci_errno; 394 if (rcode == EX_OK) 395 { 396 /* shouldn't happen */ 397 rcode = EX_SOFTWARE; 398 } 399 } 400 else if (!clever) 401 { 402 /* 403 ** Format and send message. 404 */ 405 406 putfromline(mci->mci_out, m, e); 407 (*e->e_puthdr)(mci->mci_out, m, e); 408 putline("\n", mci->mci_out, m); 409 (*e->e_putbody)(mci->mci_out, m, e); 410 411 /* get the exit status */ 412 rcode = endmailer(mci, pv[0]); 413 } 414 else 415 #ifdef SMTP 416 { 417 /* 418 ** Send the MAIL FROM: protocol 419 */ 420 421 rcode = smtpmailfrom(m, mci, e); 422 if (rcode == EX_OK) 423 { 424 register char *t = tobuf; 425 register int i; 426 427 /* send the recipient list */ 428 tobuf[0] = '\0'; 429 for (to = tochain; to != NULL; to = to->q_tchain) 430 { 431 e->e_to = to->q_paddr; 432 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 433 { 434 markfailure(e, to, i); 435 giveresponse(i, m, e); 436 } 437 else 438 { 439 *t++ = ','; 440 for (p = to->q_paddr; *p; *t++ = *p++) 441 continue; 442 } 443 } 444 445 /* now send the data */ 446 if (tobuf[0] == '\0') 447 { 448 e->e_to = NULL; 449 if (bitset(MCIF_CACHED, mci->mci_flags)) 450 smtprset(m, mci, e); 451 } 452 else 453 { 454 e->e_to = tobuf + 1; 455 rcode = smtpdata(m, mci, e); 456 } 457 458 /* now close the connection */ 459 if (!bitset(MCIF_CACHED, mci->mci_flags)) 460 smtpquit(m, mci, e); 461 } 462 } 463 #else /* not SMTP */ 464 { 465 syserr("deliver: need SMTP compiled to use clever mailer"); 466 rcode = -1; 467 goto give_up; 468 } 469 #endif /* SMTP */ 470 #ifdef NAMED_BIND 471 if (ConfigLevel < 2) 472 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 473 #endif 474 475 /* arrange a return receipt if requested */ 476 if (e->e_receiptto != NULL && bitnset(M_LOCAL, m->m_flags)) 477 { 478 e->e_flags |= EF_SENDRECEIPT; 479 /* do we want to send back more info? */ 480 } 481 482 /* 483 ** Do final status disposal. 484 ** We check for something in tobuf for the SMTP case. 485 ** If we got a temporary failure, arrange to queue the 486 ** addressees. 487 */ 488 489 give_up: 490 if (tobuf[0] != '\0') 491 giveresponse(rcode, m, e); 492 for (to = tochain; to != NULL; to = to->q_tchain) 493 { 494 if (rcode != EX_OK) 495 markfailure(e, to, rcode); 496 else 497 to->q_flags |= QSENT; 498 } 499 500 /* 501 ** Restore state and return. 502 */ 503 504 errno = 0; 505 define('g', (char *) NULL, e); 506 define('<', (char *) NULL, e); 507 return (rcode); 508 } 509 /* 510 ** MARKFAILURE -- mark a failure on a specific address. 511 ** 512 ** Parameters: 513 ** e -- the envelope we are sending. 514 ** q -- the address to mark. 515 ** rcode -- the code signifying the particular failure. 516 ** 517 ** Returns: 518 ** none. 519 ** 520 ** Side Effects: 521 ** marks the address (and possibly the envelope) with the 522 ** failure so that an error will be returned or 523 ** the message will be queued, as appropriate. 524 */ 525 526 markfailure(e, q, rcode) 527 register ENVELOPE *e; 528 register ADDRESS *q; 529 int rcode; 530 { 531 if (rcode == EX_OK) 532 return; 533 else if (rcode != EX_TEMPFAIL && rcode != EX_IOERR && rcode != EX_OSERR) 534 q->q_flags |= QBADADDR; 535 else if (curtime() > e->e_ctime + TimeOut) 536 { 537 extern char *pintvl(); 538 char buf[MAXLINE]; 539 540 if (!bitset(EF_TIMEOUT, e->e_flags)) 541 { 542 (void) sprintf(buf, "Cannot send message for %s", 543 pintvl(TimeOut, FALSE)); 544 if (e->e_message != NULL) 545 free(e->e_message); 546 e->e_message = newstr(buf); 547 message(Arpa_Info, buf); 548 } 549 q->q_flags |= QBADADDR; 550 e->e_flags |= EF_TIMEOUT; 551 } 552 else 553 q->q_flags |= QQUEUEUP; 554 } 555 /* 556 ** DOFORK -- do a fork, retrying a couple of times on failure. 557 ** 558 ** This MUST be a macro, since after a vfork we are running 559 ** two processes on the same stack!!! 560 ** 561 ** Parameters: 562 ** none. 563 ** 564 ** Returns: 565 ** From a macro??? You've got to be kidding! 566 ** 567 ** Side Effects: 568 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 569 ** pid of child in parent, zero in child. 570 ** -1 on unrecoverable error. 571 ** 572 ** Notes: 573 ** I'm awfully sorry this looks so awful. That's 574 ** vfork for you..... 575 */ 576 577 # define NFORKTRIES 5 578 579 # ifndef FORK 580 # define FORK fork 581 # endif 582 583 # define DOFORK(fORKfN) \ 584 {\ 585 register int i;\ 586 \ 587 for (i = NFORKTRIES; --i >= 0; )\ 588 {\ 589 pid = fORKfN();\ 590 if (pid >= 0)\ 591 break;\ 592 if (i > 0)\ 593 sleep((unsigned) NFORKTRIES - i);\ 594 }\ 595 } 596 /* 597 ** DOFORK -- simple fork interface to DOFORK. 598 ** 599 ** Parameters: 600 ** none. 601 ** 602 ** Returns: 603 ** pid of child in parent. 604 ** zero in child. 605 ** -1 on error. 606 ** 607 ** Side Effects: 608 ** returns twice, once in parent and once in child. 609 */ 610 611 dofork() 612 { 613 register int pid; 614 615 DOFORK(fork); 616 return (pid); 617 } 618 /* 619 ** ENDMAILER -- Wait for mailer to terminate. 620 ** 621 ** We should never get fatal errors (e.g., segmentation 622 ** violation), so we report those specially. For other 623 ** errors, we choose a status message (into statmsg), 624 ** and if it represents an error, we print it. 625 ** 626 ** Parameters: 627 ** pid -- pid of mailer. 628 ** name -- name of mailer (for error messages). 629 ** 630 ** Returns: 631 ** exit code of mailer. 632 ** 633 ** Side Effects: 634 ** none. 635 */ 636 637 endmailer(mci, name) 638 register MCI *mci; 639 char *name; 640 { 641 int st; 642 643 /* close any connections */ 644 if (mci->mci_in != NULL) 645 (void) fclose(mci->mci_in); 646 if (mci->mci_out != NULL) 647 (void) fclose(mci->mci_out); 648 mci->mci_in = mci->mci_out = NULL; 649 mci->mci_state = MCIS_CLOSED; 650 651 /* in the IPC case there is nothing to wait for */ 652 if (mci->mci_pid == 0) 653 return (EX_OK); 654 655 /* wait for the mailer process to die and collect status */ 656 st = waitfor(mci->mci_pid); 657 if (st == -1) 658 { 659 syserr("endmailer %s: wait", name); 660 return (EX_SOFTWARE); 661 } 662 663 /* see if it died a horrid death */ 664 if ((st & 0377) != 0) 665 { 666 syserr("mailer %s died with signal %o", name, st); 667 ExitStat = EX_TEMPFAIL; 668 return (EX_TEMPFAIL); 669 } 670 671 /* normal death -- return status */ 672 st = (st >> 8) & 0377; 673 return (st); 674 } 675 /* 676 ** OPENMAILER -- open connection to mailer. 677 ** 678 ** Parameters: 679 ** m -- mailer descriptor. 680 ** pvp -- parameter vector to pass to mailer. 681 ** ctladdr -- controlling address for user. 682 ** clever -- create a full duplex connection. 683 ** 684 ** Returns: 685 ** The mail connection info struct for this connection. 686 ** NULL on failure. 687 ** 688 ** Side Effects: 689 ** creates a mailer in a subprocess. 690 */ 691 692 MCI * 693 openmailer(m, pvp, ctladdr, clever, e) 694 MAILER *m; 695 char **pvp; 696 ADDRESS *ctladdr; 697 bool clever; 698 ENVELOPE *e; 699 { 700 int pid; 701 register MCI *mci; 702 int mpvect[2]; 703 int rpvect[2]; 704 extern FILE *fdopen(); 705 706 if (tTd(11, 1)) 707 { 708 printf("openmailer:"); 709 printav(pvp); 710 } 711 errno = 0; 712 713 CurHostName = m->m_mailer; 714 715 /* 716 ** Deal with the special case of mail handled through an IPC 717 ** connection. 718 ** In this case we don't actually fork. We must be 719 ** running SMTP for this to work. We will return a 720 ** zero pid to indicate that we are running IPC. 721 ** We also handle a debug version that just talks to stdin/out. 722 */ 723 724 /* check for Local Person Communication -- not for mortals!!! */ 725 if (strcmp(m->m_mailer, "[LPC]") == 0) 726 { 727 mci = (MCI *) xalloc(sizeof *mci); 728 bzero((char *) mci, sizeof *mci); 729 mci->mci_in = stdin; 730 mci->mci_out = stdout; 731 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 732 mci->mci_mailer = m; 733 } 734 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 735 strcmp(m->m_mailer, "[TCP]") == 0) 736 { 737 #ifdef DAEMON 738 register int i; 739 register u_short port; 740 char *curhost; 741 extern MCI *mci_get(); 742 extern char *hostsignature(); 743 744 CurHostName = pvp[1]; 745 curhost = hostsignature(m, pvp[1], e); 746 747 if (!clever) 748 syserr("non-clever IPC"); 749 if (pvp[2] != NULL) 750 port = atoi(pvp[2]); 751 else 752 port = 0; 753 while (*curhost != '\0') 754 { 755 register char *p; 756 char hostbuf[MAXNAME]; 757 758 /* pull the next host from the signature */ 759 p = strchr(curhost, ':'); 760 if (p == NULL) 761 p = &curhost[strlen(curhost)]; 762 strncpy(hostbuf, curhost, p - curhost); 763 hostbuf[p - curhost] = '\0'; 764 if (*p != '\0') 765 p++; 766 curhost = p; 767 768 /* see if we already know that this host is fried */ 769 CurHostName = hostbuf; 770 mci = mci_get(hostbuf, m); 771 if (mci->mci_state != MCIS_CLOSED) 772 { 773 if (tTd(11, 1)) 774 { 775 printf("openmailer: "); 776 mci_dump(mci); 777 } 778 return mci; 779 } 780 mci->mci_mailer = m; 781 if (mci->mci_exitstat != EX_OK) 782 continue; 783 784 /* try the connection */ 785 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 786 message(Arpa_Info, "Connecting to %s (%s)...", 787 hostbuf, m->m_name); 788 i = makeconnection(hostbuf, port, mci, 789 bitnset(M_SECURE_PORT, m->m_flags)); 790 mci->mci_exitstat = i; 791 mci->mci_errno = errno; 792 if (i == EX_OK) 793 { 794 mci->mci_state = MCIS_OPENING; 795 mci_cache(mci); 796 break; 797 } 798 else if (tTd(11, 1)) 799 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 800 i, errno); 801 802 803 /* enter status of this host */ 804 setstat(i); 805 } 806 mci->mci_pid = 0; 807 #else /* no DAEMON */ 808 syserr("openmailer: no IPC"); 809 if (tTd(11, 1)) 810 printf("openmailer: NULL\n"); 811 return NULL; 812 #endif /* DAEMON */ 813 } 814 else 815 { 816 /* create a pipe to shove the mail through */ 817 if (pipe(mpvect) < 0) 818 { 819 syserr("openmailer: pipe (to mailer)"); 820 if (tTd(11, 1)) 821 printf("openmailer: NULL\n"); 822 return NULL; 823 } 824 825 /* if this mailer speaks smtp, create a return pipe */ 826 if (clever && pipe(rpvect) < 0) 827 { 828 syserr("openmailer: pipe (from mailer)"); 829 (void) close(mpvect[0]); 830 (void) close(mpvect[1]); 831 if (tTd(11, 1)) 832 printf("openmailer: NULL\n"); 833 return NULL; 834 } 835 836 /* 837 ** Actually fork the mailer process. 838 ** DOFORK is clever about retrying. 839 ** 840 ** Dispose of SIGCHLD signal catchers that may be laying 841 ** around so that endmail will get it. 842 */ 843 844 if (e->e_xfp != NULL) 845 (void) fflush(e->e_xfp); /* for debugging */ 846 (void) fflush(stdout); 847 # ifdef SIGCHLD 848 (void) signal(SIGCHLD, SIG_DFL); 849 # endif /* SIGCHLD */ 850 DOFORK(FORK); 851 /* pid is set by DOFORK */ 852 if (pid < 0) 853 { 854 /* failure */ 855 syserr("openmailer: cannot fork"); 856 (void) close(mpvect[0]); 857 (void) close(mpvect[1]); 858 if (clever) 859 { 860 (void) close(rpvect[0]); 861 (void) close(rpvect[1]); 862 } 863 if (tTd(11, 1)) 864 printf("openmailer: NULL\n"); 865 return NULL; 866 } 867 else if (pid == 0) 868 { 869 int i; 870 int saveerrno; 871 extern int DtableSize; 872 873 /* child -- set up input & exec mailer */ 874 /* make diagnostic output be standard output */ 875 (void) signal(SIGINT, SIG_IGN); 876 (void) signal(SIGHUP, SIG_IGN); 877 (void) signal(SIGTERM, SIG_DFL); 878 879 /* arrange to filter std & diag output of command */ 880 if (clever) 881 { 882 (void) close(rpvect[0]); 883 (void) close(1); 884 (void) dup(rpvect[1]); 885 (void) close(rpvect[1]); 886 } 887 else if (OpMode == MD_SMTP || HoldErrs) 888 { 889 /* put mailer output in transcript */ 890 (void) close(1); 891 (void) dup(fileno(e->e_xfp)); 892 } 893 (void) close(2); 894 (void) dup(1); 895 896 /* arrange to get standard input */ 897 (void) close(mpvect[1]); 898 (void) close(0); 899 if (dup(mpvect[0]) < 0) 900 { 901 syserr("Cannot dup to zero!"); 902 _exit(EX_OSERR); 903 } 904 (void) close(mpvect[0]); 905 if (!bitnset(M_RESTR, m->m_flags)) 906 { 907 if (ctladdr == NULL || ctladdr->q_uid == 0) 908 { 909 (void) setgid(DefGid); 910 (void) initgroups(DefUser, DefGid); 911 (void) setuid(DefUid); 912 } 913 else 914 { 915 (void) setgid(ctladdr->q_gid); 916 (void) initgroups(ctladdr->q_ruser? 917 ctladdr->q_ruser: ctladdr->q_user, 918 ctladdr->q_gid); 919 (void) setuid(ctladdr->q_uid); 920 } 921 } 922 923 /* arrange for all the files to be closed */ 924 for (i = 3; i < DtableSize; i++) 925 { 926 register int j; 927 if ((j = fcntl(i, F_GETFD, 0)) != -1) 928 (void)fcntl(i, F_SETFD, j|1); 929 } 930 931 /* try to execute the mailer */ 932 execve(m->m_mailer, pvp, UserEnviron); 933 saveerrno = errno; 934 syserr("Cannot exec %s", m->m_mailer); 935 if (m == LocalMailer) 936 _exit(EX_TEMPFAIL); 937 switch (saveerrno) 938 { 939 case EIO: 940 case EAGAIN: 941 case ENOMEM: 942 # ifdef EPROCLIM 943 case EPROCLIM: 944 # endif 945 _exit(EX_TEMPFAIL); 946 } 947 _exit(EX_UNAVAILABLE); 948 } 949 950 /* 951 ** Set up return value. 952 */ 953 954 mci = (MCI *) xalloc(sizeof *mci); 955 bzero((char *) mci, sizeof *mci); 956 mci->mci_mailer = m; 957 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 958 mci->mci_pid = pid; 959 (void) close(mpvect[0]); 960 mci->mci_out = fdopen(mpvect[1], "w"); 961 if (clever) 962 { 963 (void) close(rpvect[1]); 964 mci->mci_in = fdopen(rpvect[0], "r"); 965 } 966 else 967 { 968 mci->mci_flags |= MCIF_TEMP; 969 mci->mci_in = NULL; 970 } 971 } 972 973 /* 974 ** If we are in SMTP opening state, send initial protocol. 975 */ 976 977 if (clever && mci->mci_state != MCIS_CLOSED) 978 { 979 smtpinit(m, mci, e); 980 } 981 if (tTd(11, 1)) 982 { 983 printf("openmailer: "); 984 mci_dump(mci); 985 } 986 987 return mci; 988 } 989 /* 990 ** GIVERESPONSE -- Interpret an error response from a mailer 991 ** 992 ** Parameters: 993 ** stat -- the status code from the mailer (high byte 994 ** only; core dumps must have been taken care of 995 ** already). 996 ** m -- the mailer descriptor for this mailer. 997 ** 998 ** Returns: 999 ** none. 1000 ** 1001 ** Side Effects: 1002 ** Errors may be incremented. 1003 ** ExitStat may be set. 1004 */ 1005 1006 giveresponse(stat, m, e) 1007 int stat; 1008 register MAILER *m; 1009 ENVELOPE *e; 1010 { 1011 register char *statmsg; 1012 extern char *SysExMsg[]; 1013 register int i; 1014 extern int N_SysEx; 1015 #ifdef NAMED_BIND 1016 extern int h_errno; 1017 #endif 1018 char buf[MAXLINE]; 1019 1020 #ifdef lint 1021 if (m == NULL) 1022 return; 1023 #endif lint 1024 1025 /* 1026 ** Compute status message from code. 1027 */ 1028 1029 i = stat - EX__BASE; 1030 if (stat == 0) 1031 statmsg = "250 Sent"; 1032 else if (i < 0 || i > N_SysEx) 1033 { 1034 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1035 stat = EX_UNAVAILABLE; 1036 statmsg = buf; 1037 } 1038 else if (stat == EX_TEMPFAIL) 1039 { 1040 (void) strcpy(buf, SysExMsg[i]); 1041 #ifdef NAMED_BIND 1042 if (h_errno == TRY_AGAIN) 1043 { 1044 extern char *errstring(); 1045 1046 statmsg = errstring(h_errno+MAX_ERRNO); 1047 } 1048 else 1049 #endif 1050 { 1051 if (errno != 0) 1052 { 1053 extern char *errstring(); 1054 1055 statmsg = errstring(errno); 1056 } 1057 else 1058 { 1059 #ifdef SMTP 1060 extern char SmtpError[]; 1061 1062 statmsg = SmtpError; 1063 #else /* SMTP */ 1064 statmsg = NULL; 1065 #endif /* SMTP */ 1066 } 1067 } 1068 if (statmsg != NULL && statmsg[0] != '\0') 1069 { 1070 (void) strcat(buf, ": "); 1071 (void) strcat(buf, statmsg); 1072 } 1073 statmsg = buf; 1074 } 1075 else 1076 { 1077 statmsg = SysExMsg[i]; 1078 } 1079 1080 /* 1081 ** Print the message as appropriate 1082 */ 1083 1084 if (stat == EX_OK || stat == EX_TEMPFAIL) 1085 message(Arpa_Info, &statmsg[4]); 1086 else 1087 { 1088 Errors++; 1089 usrerr(statmsg); 1090 } 1091 1092 /* 1093 ** Final cleanup. 1094 ** Log a record of the transaction. Compute the new 1095 ** ExitStat -- if we already had an error, stick with 1096 ** that. 1097 */ 1098 1099 if (LogLevel > ((stat == 0 || stat == EX_TEMPFAIL) ? 3 : 2)) 1100 logdelivery(&statmsg[4], e); 1101 1102 if (stat != EX_TEMPFAIL) 1103 setstat(stat); 1104 if (stat != EX_OK) 1105 { 1106 if (e->e_message != NULL) 1107 free(e->e_message); 1108 e->e_message = newstr(&statmsg[4]); 1109 } 1110 errno = 0; 1111 #ifdef NAMED_BIND 1112 h_errno = 0; 1113 #endif 1114 } 1115 /* 1116 ** LOGDELIVERY -- log the delivery in the system log 1117 ** 1118 ** Parameters: 1119 ** stat -- the message to print for the status 1120 ** 1121 ** Returns: 1122 ** none 1123 ** 1124 ** Side Effects: 1125 ** none 1126 */ 1127 1128 logdelivery(stat, e) 1129 char *stat; 1130 register ENVELOPE *e; 1131 { 1132 extern char *pintvl(); 1133 1134 # ifdef LOG 1135 syslog(LOG_INFO, "%s: to=%s, delay=%s, stat=%s", e->e_id, 1136 e->e_to, pintvl(curtime() - e->e_ctime, TRUE), stat); 1137 # endif /* LOG */ 1138 } 1139 /* 1140 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1141 ** 1142 ** This can be made an arbitrary message separator by changing $l 1143 ** 1144 ** One of the ugliest hacks seen by human eyes is contained herein: 1145 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1146 ** does a well-meaning programmer such as myself have to deal with 1147 ** this kind of antique garbage???? 1148 ** 1149 ** Parameters: 1150 ** fp -- the file to output to. 1151 ** m -- the mailer describing this entry. 1152 ** 1153 ** Returns: 1154 ** none 1155 ** 1156 ** Side Effects: 1157 ** outputs some text to fp. 1158 */ 1159 1160 putfromline(fp, m, e) 1161 register FILE *fp; 1162 register MAILER *m; 1163 ENVELOPE *e; 1164 { 1165 char *template = "\001l\n"; 1166 char buf[MAXLINE]; 1167 1168 if (bitnset(M_NHDR, m->m_flags)) 1169 return; 1170 1171 # ifdef UGLYUUCP 1172 if (bitnset(M_UGLYUUCP, m->m_flags)) 1173 { 1174 char *bang; 1175 char xbuf[MAXLINE]; 1176 1177 expand("\001<", buf, &buf[sizeof buf - 1], e); 1178 bang = strchr(buf, '!'); 1179 if (bang == NULL) 1180 syserr("No ! in UUCP! (%s)", buf); 1181 else 1182 { 1183 *bang++ = '\0'; 1184 (void) sprintf(xbuf, "From %s \001d remote from %s\n", bang, buf); 1185 template = xbuf; 1186 } 1187 } 1188 # endif /* UGLYUUCP */ 1189 expand(template, buf, &buf[sizeof buf - 1], e); 1190 putline(buf, fp, m); 1191 } 1192 /* 1193 ** PUTBODY -- put the body of a message. 1194 ** 1195 ** Parameters: 1196 ** fp -- file to output onto. 1197 ** m -- a mailer descriptor to control output format. 1198 ** e -- the envelope to put out. 1199 ** 1200 ** Returns: 1201 ** none. 1202 ** 1203 ** Side Effects: 1204 ** The message is written onto fp. 1205 */ 1206 1207 putbody(fp, m, e) 1208 FILE *fp; 1209 MAILER *m; 1210 register ENVELOPE *e; 1211 { 1212 char buf[MAXLINE]; 1213 1214 /* 1215 ** Output the body of the message 1216 */ 1217 1218 if (e->e_dfp == NULL) 1219 { 1220 if (e->e_df != NULL) 1221 { 1222 e->e_dfp = fopen(e->e_df, "r"); 1223 if (e->e_dfp == NULL) 1224 syserr("putbody: Cannot open %s for %s from %s", 1225 e->e_df, e->e_to, e->e_from); 1226 } 1227 else 1228 putline("<<< No Message Collected >>>", fp, m); 1229 } 1230 if (e->e_dfp != NULL) 1231 { 1232 rewind(e->e_dfp); 1233 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1234 { 1235 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1236 strncmp(buf, "From ", 5) == 0) 1237 (void) putc('>', fp); 1238 putline(buf, fp, m); 1239 } 1240 1241 if (ferror(e->e_dfp)) 1242 { 1243 syserr("putbody: read error"); 1244 ExitStat = EX_IOERR; 1245 } 1246 } 1247 1248 (void) fflush(fp); 1249 if (ferror(fp) && errno != EPIPE) 1250 { 1251 syserr("putbody: write error"); 1252 ExitStat = EX_IOERR; 1253 } 1254 errno = 0; 1255 } 1256 /* 1257 ** MAILFILE -- Send a message to a file. 1258 ** 1259 ** If the file has the setuid/setgid bits set, but NO execute 1260 ** bits, sendmail will try to become the owner of that file 1261 ** rather than the real user. Obviously, this only works if 1262 ** sendmail runs as root. 1263 ** 1264 ** This could be done as a subordinate mailer, except that it 1265 ** is used implicitly to save messages in ~/dead.letter. We 1266 ** view this as being sufficiently important as to include it 1267 ** here. For example, if the system is dying, we shouldn't have 1268 ** to create another process plus some pipes to save the message. 1269 ** 1270 ** Parameters: 1271 ** filename -- the name of the file to send to. 1272 ** ctladdr -- the controlling address header -- includes 1273 ** the userid/groupid to be when sending. 1274 ** 1275 ** Returns: 1276 ** The exit code associated with the operation. 1277 ** 1278 ** Side Effects: 1279 ** none. 1280 */ 1281 1282 mailfile(filename, ctladdr, e) 1283 char *filename; 1284 ADDRESS *ctladdr; 1285 register ENVELOPE *e; 1286 { 1287 register FILE *f; 1288 register int pid; 1289 int mode; 1290 1291 /* 1292 ** Fork so we can change permissions here. 1293 ** Note that we MUST use fork, not vfork, because of 1294 ** the complications of calling subroutines, etc. 1295 */ 1296 1297 DOFORK(fork); 1298 1299 if (pid < 0) 1300 return (EX_OSERR); 1301 else if (pid == 0) 1302 { 1303 /* child -- actually write to file */ 1304 struct stat stb; 1305 1306 (void) signal(SIGINT, SIG_DFL); 1307 (void) signal(SIGHUP, SIG_DFL); 1308 (void) signal(SIGTERM, SIG_DFL); 1309 (void) umask(OldUmask); 1310 1311 if (stat(filename, &stb) < 0) 1312 stb.st_mode = 0666; 1313 mode = stb.st_mode; 1314 1315 /* limit the errors to those actually caused in the child */ 1316 errno = 0; 1317 ExitStat = EX_OK; 1318 1319 if (bitset(0111, stb.st_mode)) 1320 exit(EX_CANTCREAT); 1321 if (ctladdr == NULL) 1322 ctladdr = &e->e_from; 1323 else 1324 { 1325 /* ignore setuid and setgid bits */ 1326 mode &= ~(S_ISGID|S_ISUID); 1327 } 1328 1329 /* we have to open the dfile BEFORE setuid */ 1330 if (e->e_dfp == NULL && e->e_df != NULL) 1331 { 1332 e->e_dfp = fopen(e->e_df, "r"); 1333 if (e->e_dfp == NULL) 1334 { 1335 syserr("mailfile: Cannot open %s for %s from %s", 1336 e->e_df, e->e_to, e->e_from); 1337 } 1338 } 1339 1340 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1341 { 1342 if (ctladdr->q_uid == 0) 1343 { 1344 (void) setgid(DefGid); 1345 (void) initgroups(DefUser, DefGid); 1346 } 1347 else 1348 { 1349 (void) setgid(ctladdr->q_gid); 1350 (void) initgroups(ctladdr->q_ruser ? 1351 ctladdr->q_ruser : ctladdr->q_user, 1352 ctladdr->q_gid); 1353 } 1354 } 1355 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1356 { 1357 if (ctladdr->q_uid == 0) 1358 (void) setuid(DefUid); 1359 else 1360 (void) setuid(ctladdr->q_uid); 1361 } 1362 FileName = filename; 1363 LineNumber = 0; 1364 f = dfopen(filename, "a"); 1365 if (f == NULL) 1366 { 1367 message("cannot open"); 1368 exit(EX_CANTCREAT); 1369 } 1370 1371 putfromline(f, ProgMailer, e); 1372 (*e->e_puthdr)(f, ProgMailer, e); 1373 putline("\n", f, ProgMailer); 1374 (*e->e_putbody)(f, ProgMailer, e); 1375 putline("\n", f, ProgMailer); 1376 if (ferror(f)) 1377 { 1378 message("I/O error"); 1379 setstat(EX_IOERR); 1380 } 1381 (void) fclose(f); 1382 (void) fflush(stdout); 1383 1384 /* reset ISUID & ISGID bits for paranoid systems */ 1385 (void) chmod(filename, (int) stb.st_mode); 1386 exit(ExitStat); 1387 /*NOTREACHED*/ 1388 } 1389 else 1390 { 1391 /* parent -- wait for exit status */ 1392 int st; 1393 1394 st = waitfor(pid); 1395 if ((st & 0377) != 0) 1396 return (EX_UNAVAILABLE); 1397 else 1398 return ((st >> 8) & 0377); 1399 /*NOTREACHED*/ 1400 } 1401 } 1402 /* 1403 ** SENDALL -- actually send all the messages. 1404 ** 1405 ** Parameters: 1406 ** e -- the envelope to send. 1407 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1408 ** the current SendMode. 1409 ** 1410 ** Returns: 1411 ** none. 1412 ** 1413 ** Side Effects: 1414 ** Scans the send lists and sends everything it finds. 1415 ** Delivers any appropriate error messages. 1416 ** If we are running in a non-interactive mode, takes the 1417 ** appropriate action. 1418 */ 1419 1420 sendall(e, mode) 1421 ENVELOPE *e; 1422 char mode; 1423 { 1424 register ADDRESS *q; 1425 bool oldverbose; 1426 int pid; 1427 int nsent; 1428 # ifdef LOCKF 1429 struct flock lfd; 1430 # endif 1431 1432 /* determine actual delivery mode */ 1433 if (mode == SM_DEFAULT) 1434 { 1435 extern bool shouldqueue(); 1436 1437 if (shouldqueue(e->e_msgpriority, e->e_ctime)) 1438 mode = SM_QUEUE; 1439 else 1440 mode = SendMode; 1441 } 1442 1443 if (tTd(13, 1)) 1444 { 1445 printf("\nSENDALL: mode %c, sendqueue:\n", mode); 1446 printaddr(e->e_sendqueue, TRUE); 1447 } 1448 1449 /* 1450 ** Do any preprocessing necessary for the mode we are running. 1451 ** Check to make sure the hop count is reasonable. 1452 ** Delete sends to the sender in mailing lists. 1453 */ 1454 1455 CurEnv = e; 1456 1457 if (e->e_hopcount > MaxHopCount) 1458 { 1459 errno = 0; 1460 syserr("sendall: too many hops %d (%d max): from %s, to %s", 1461 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, e->e_to); 1462 return; 1463 } 1464 1465 if (!MeToo) 1466 { 1467 extern ADDRESS *recipient(); 1468 1469 e->e_from.q_flags |= QDONTSEND; 1470 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1471 } 1472 1473 # ifdef QUEUE 1474 if ((mode == SM_QUEUE || mode == SM_FORK || 1475 (mode != SM_VERIFY && SuperSafe)) && 1476 !bitset(EF_INQUEUE, e->e_flags)) 1477 queueup(e, TRUE, mode == SM_QUEUE); 1478 #endif /* QUEUE */ 1479 1480 oldverbose = Verbose; 1481 switch (mode) 1482 { 1483 case SM_VERIFY: 1484 Verbose = TRUE; 1485 break; 1486 1487 case SM_QUEUE: 1488 queueonly: 1489 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1490 return; 1491 1492 case SM_FORK: 1493 if (e->e_xfp != NULL) 1494 (void) fflush(e->e_xfp); 1495 1496 # ifdef LOCKF 1497 /* 1498 ** Since lockf has the interesting semantic that the 1499 ** lock is lost when we fork, we have to risk losing 1500 ** the lock here by closing before the fork, and then 1501 ** trying to get it back in the child. 1502 */ 1503 1504 if (e->e_lockfp != NULL) 1505 { 1506 (void) fclose(e->e_lockfp); 1507 e->e_lockfp = NULL; 1508 } 1509 # endif /* LOCKF */ 1510 1511 pid = fork(); 1512 if (pid < 0) 1513 { 1514 goto queueonly; 1515 } 1516 else if (pid > 0) 1517 { 1518 /* be sure we leave the temp files to our child */ 1519 e->e_id = e->e_df = NULL; 1520 # ifndef LOCKF 1521 if (e->e_lockfp != NULL) 1522 (void) fclose(e->e_lockfp); 1523 # endif 1524 return; 1525 } 1526 1527 /* double fork to avoid zombies */ 1528 if (fork() > 0) 1529 exit(EX_OK); 1530 1531 /* be sure we are immune from the terminal */ 1532 disconnect(FALSE); 1533 1534 # ifdef LOCKF 1535 /* 1536 ** Now try to get our lock back. 1537 */ 1538 1539 lfd.l_type = F_WRLCK; 1540 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1541 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1542 if (e->e_lockfp == NULL || 1543 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1544 { 1545 /* oops.... lost it */ 1546 # ifdef LOG 1547 if (LogLevel > 5) 1548 syslog(LOG_NOTICE, "%s: lost lock: %m", 1549 e->e_id); 1550 # endif /* LOG */ 1551 exit(EX_OK); 1552 } 1553 # endif /* LOCKF */ 1554 1555 break; 1556 } 1557 1558 /* 1559 ** Run through the list and send everything. 1560 */ 1561 1562 nsent = 0; 1563 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1564 { 1565 if (mode == SM_VERIFY) 1566 { 1567 e->e_to = q->q_paddr; 1568 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1569 message(Arpa_Info, "deliverable"); 1570 } 1571 else if (!bitset(QDONTSEND, q->q_flags)) 1572 { 1573 # ifdef QUEUE 1574 /* 1575 ** Checkpoint the send list every few addresses 1576 */ 1577 1578 if (nsent >= CheckpointInterval) 1579 { 1580 queueup(e, TRUE, FALSE); 1581 nsent = 0; 1582 } 1583 # endif /* QUEUE */ 1584 if (deliver(e, q) == EX_OK) 1585 nsent++; 1586 } 1587 } 1588 Verbose = oldverbose; 1589 1590 /* 1591 ** Now run through and check for errors. 1592 */ 1593 1594 if (mode == SM_VERIFY) 1595 return; 1596 1597 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1598 { 1599 register ADDRESS *qq; 1600 1601 if (tTd(13, 3)) 1602 { 1603 printf("Checking "); 1604 printaddr(q, FALSE); 1605 } 1606 1607 /* only send errors if the message failed */ 1608 if (!bitset(QBADADDR, q->q_flags)) 1609 continue; 1610 1611 /* we have an address that failed -- find the parent */ 1612 for (qq = q; qq != NULL; qq = qq->q_alias) 1613 { 1614 char obuf[MAXNAME + 6]; 1615 extern char *aliaslookup(); 1616 1617 /* we can only have owners for local addresses */ 1618 if (!bitnset(M_LOCAL, qq->q_mailer->m_flags)) 1619 continue; 1620 1621 /* see if the owner list exists */ 1622 (void) strcpy(obuf, "owner-"); 1623 if (strncmp(qq->q_user, "owner-", 6) == 0) 1624 (void) strcat(obuf, "owner"); 1625 else 1626 (void) strcat(obuf, qq->q_user); 1627 if (!bitnset(M_USR_UPPER, qq->q_mailer->m_flags)) 1628 makelower(obuf); 1629 if (aliaslookup(obuf) == NULL) 1630 continue; 1631 1632 if (tTd(13, 4)) 1633 printf("Errors to %s\n", obuf); 1634 1635 /* owner list exists -- add it to the error queue */ 1636 sendtolist(obuf, (ADDRESS *) NULL, &e->e_errorqueue, e); 1637 1638 /* and set the return path to point to it */ 1639 e->e_returnpath = newstr(obuf); 1640 1641 ErrorMode = EM_MAIL; 1642 break; 1643 } 1644 1645 /* if we did not find an owner, send to the sender */ 1646 if (qq == NULL && bitset(QBADADDR, q->q_flags)) 1647 sendtolist(e->e_from.q_paddr, qq, &e->e_errorqueue, e); 1648 } 1649 1650 if (mode == SM_FORK) 1651 finis(); 1652 } 1653 /* 1654 ** HOSTSIGNATURE -- return the "signature" for a host. 1655 ** 1656 ** The signature describes how we are going to send this -- it 1657 ** can be just the hostname (for non-Internet hosts) or can be 1658 ** an ordered list of MX hosts. 1659 ** 1660 ** Parameters: 1661 ** m -- the mailer describing this host. 1662 ** host -- the host name. 1663 ** e -- the current envelope. 1664 ** 1665 ** Returns: 1666 ** The signature for this host. 1667 ** 1668 ** Side Effects: 1669 ** Can tweak the symbol table. 1670 */ 1671 1672 char * 1673 hostsignature(m, host, e) 1674 register MAILER *m; 1675 char *host; 1676 ENVELOPE *e; 1677 { 1678 register char *p; 1679 register STAB *s; 1680 int i; 1681 int len; 1682 #ifdef NAMED_BIND 1683 int nmx; 1684 auto int rcode; 1685 char *mxhosts[MAXMXHOSTS + 1]; 1686 static char myhostbuf[MAXNAME]; 1687 #endif 1688 1689 /* 1690 ** Check to see if this uses IPC -- if not, it can't have MX records. 1691 */ 1692 1693 p = m->m_mailer; 1694 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1695 { 1696 /* just an ordinary mailer */ 1697 return host; 1698 } 1699 1700 /* 1701 ** If it is a numeric address, just return it. 1702 */ 1703 1704 if (host[0] == '[') 1705 return host; 1706 1707 /* 1708 ** Look it up in the symbol table. 1709 */ 1710 1711 s = stab(host, ST_HOSTSIG, ST_ENTER); 1712 if (s->s_hostsig != NULL) 1713 return s->s_hostsig; 1714 1715 /* 1716 ** Not already there -- create a signature. 1717 */ 1718 1719 #ifdef NAMED_BIND 1720 if (myhostbuf[0] == '\0') 1721 expand("\001j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1722 1723 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1724 if (nmx <= 0) 1725 { 1726 register MCI *mci; 1727 extern int errno; 1728 extern MCI *mci_get(); 1729 1730 /* update the connection info for this host */ 1731 mci = mci_get(host, m); 1732 mci->mci_exitstat = rcode; 1733 mci->mci_errno = errno; 1734 1735 /* and return the original host name as the signature */ 1736 s->s_hostsig = host; 1737 return host; 1738 } 1739 1740 len = 0; 1741 for (i = 0; i < nmx; i++) 1742 { 1743 len += strlen(mxhosts[i]) + 1; 1744 } 1745 s->s_hostsig = p = xalloc(len); 1746 for (i = 0; i < nmx; i++) 1747 { 1748 if (i != 0) 1749 *p++ = ':'; 1750 strcpy(p, mxhosts[i]); 1751 p += strlen(p); 1752 } 1753 makelower(s->s_hostsig); 1754 #else 1755 /* not using BIND -- the signature is just the host name */ 1756 s->s_hostsig = host; 1757 #endif 1758 if (tTd(17, 1)) 1759 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1760 return s->s_hostsig; 1761 } 1762