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 6.15 (Berkeley) 02/14/93"; 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 if (tTd(10, 5)) 247 { 248 printf("deliver: QDONTSEND "); 249 printaddr(to, FALSE); 250 } 251 252 /* 253 ** Check to see that these people are allowed to 254 ** talk to each other. 255 */ 256 257 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 258 { 259 NoReturn = TRUE; 260 usrerr("Message is too large; %ld bytes max", m->m_maxsize); 261 giveresponse(EX_UNAVAILABLE, m, e); 262 continue; 263 } 264 rcode = checkcompat(to, e); 265 if (rcode != EX_OK) 266 { 267 giveresponse(rcode, m, e); 268 continue; 269 } 270 271 /* 272 ** Strip quote bits from names if the mailer is dumb 273 ** about them. 274 */ 275 276 if (bitnset(M_STRIPQ, m->m_flags)) 277 { 278 stripquotes(user); 279 stripquotes(host); 280 } 281 282 /* hack attack -- delivermail compatibility */ 283 if (m == ProgMailer && *user == '|') 284 user++; 285 286 /* 287 ** If an error message has already been given, don't 288 ** bother to send to this address. 289 ** 290 ** >>>>>>>>>> This clause assumes that the local mailer 291 ** >> NOTE >> cannot do any further aliasing; that 292 ** >>>>>>>>>> function is subsumed by sendmail. 293 */ 294 295 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 296 continue; 297 298 /* save statistics.... */ 299 markstats(e, to); 300 301 /* 302 ** See if this user name is "special". 303 ** If the user name has a slash in it, assume that this 304 ** is a file -- send it off without further ado. Note 305 ** that this type of addresses is not processed along 306 ** with the others, so we fudge on the To person. 307 */ 308 309 if (m == FileMailer) 310 { 311 rcode = mailfile(user, getctladdr(to), e); 312 giveresponse(rcode, m, e); 313 if (rcode == EX_OK) 314 to->q_flags |= QSENT; 315 continue; 316 } 317 318 /* 319 ** Address is verified -- add this user to mailer 320 ** argv, and add it to the print list of recipients. 321 */ 322 323 /* link together the chain of recipients */ 324 to->q_tchain = tochain; 325 tochain = to; 326 327 /* create list of users for error messages */ 328 (void) strcat(tobuf, ","); 329 (void) strcat(tobuf, to->q_paddr); 330 define('u', user, e); /* to user */ 331 define('z', to->q_home, e); /* user's home */ 332 333 /* 334 ** Expand out this user into argument list. 335 */ 336 337 if (!clever) 338 { 339 expand(*mvp, buf, &buf[sizeof buf - 1], e); 340 *pvp++ = newstr(buf); 341 if (pvp >= &pv[MAXPV - 2]) 342 { 343 /* allow some space for trailing parms */ 344 break; 345 } 346 } 347 } 348 349 /* see if any addresses still exist */ 350 if (tobuf[0] == '\0') 351 { 352 define('g', (char *) NULL, e); 353 define('<', (char *) NULL, e); 354 return (0); 355 } 356 357 /* print out messages as full list */ 358 e->e_to = tobuf + 1; 359 360 /* 361 ** Fill out any parameters after the $u parameter. 362 */ 363 364 while (!clever && *++mvp != NULL) 365 { 366 expand(*mvp, buf, &buf[sizeof buf - 1], e); 367 *pvp++ = newstr(buf); 368 if (pvp >= &pv[MAXPV]) 369 syserr("deliver: pv overflow after $u for %s", pv[0]); 370 } 371 *pvp++ = NULL; 372 373 /* 374 ** Call the mailer. 375 ** The argument vector gets built, pipes 376 ** are created as necessary, and we fork & exec as 377 ** appropriate. 378 ** If we are running SMTP, we just need to clean up. 379 */ 380 381 if (ctladdr == NULL) 382 ctladdr = &e->e_from; 383 #ifdef NAMED_BIND 384 if (ConfigLevel < 2) 385 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 386 #endif 387 mci = openmailer(m, pv, ctladdr, clever, e); 388 if (mci == NULL) 389 { 390 /* catastrophic error */ 391 rcode = EX_OSERR; 392 goto give_up; 393 } 394 else if (mci->mci_state != MCIS_OPEN) 395 { 396 /* couldn't open the mailer */ 397 rcode = mci->mci_exitstat; 398 errno = mci->mci_errno; 399 if (rcode == EX_OK) 400 { 401 /* shouldn't happen */ 402 syserr("deliver: rcode=%d, mci_state=%d, sig=%s", 403 rcode, mci->mci_state, firstsig); 404 rcode = EX_SOFTWARE; 405 } 406 } 407 else if (!clever) 408 { 409 /* 410 ** Format and send message. 411 */ 412 413 putfromline(mci->mci_out, m, e); 414 (*e->e_puthdr)(mci->mci_out, m, e); 415 putline("\n", mci->mci_out, m); 416 (*e->e_putbody)(mci->mci_out, m, e); 417 418 /* get the exit status */ 419 rcode = endmailer(mci, pv[0]); 420 } 421 else 422 #ifdef SMTP 423 { 424 /* 425 ** Send the MAIL FROM: protocol 426 */ 427 428 rcode = smtpmailfrom(m, mci, e); 429 if (rcode == EX_OK) 430 { 431 register char *t = tobuf; 432 register int i; 433 434 /* send the recipient list */ 435 tobuf[0] = '\0'; 436 for (to = tochain; to != NULL; to = to->q_tchain) 437 { 438 e->e_to = to->q_paddr; 439 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 440 { 441 markfailure(e, to, i); 442 giveresponse(i, m, e); 443 } 444 else 445 { 446 *t++ = ','; 447 for (p = to->q_paddr; *p; *t++ = *p++) 448 continue; 449 } 450 } 451 452 /* now send the data */ 453 if (tobuf[0] == '\0') 454 { 455 e->e_to = NULL; 456 if (bitset(MCIF_CACHED, mci->mci_flags)) 457 smtprset(m, mci, e); 458 } 459 else 460 { 461 e->e_to = tobuf + 1; 462 rcode = smtpdata(m, mci, e); 463 } 464 465 /* now close the connection */ 466 if (!bitset(MCIF_CACHED, mci->mci_flags)) 467 smtpquit(m, mci, e); 468 } 469 } 470 #else /* not SMTP */ 471 { 472 syserr("deliver: need SMTP compiled to use clever mailer"); 473 rcode = EX_CONFIG; 474 goto give_up; 475 } 476 #endif /* SMTP */ 477 #ifdef NAMED_BIND 478 if (ConfigLevel < 2) 479 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 480 #endif 481 482 /* arrange a return receipt if requested */ 483 if (e->e_receiptto != NULL && bitnset(M_LOCAL, m->m_flags)) 484 { 485 e->e_flags |= EF_SENDRECEIPT; 486 /* do we want to send back more info? */ 487 } 488 489 /* 490 ** Do final status disposal. 491 ** We check for something in tobuf for the SMTP case. 492 ** If we got a temporary failure, arrange to queue the 493 ** addressees. 494 */ 495 496 give_up: 497 if (tobuf[0] != '\0') 498 giveresponse(rcode, m, e); 499 for (to = tochain; to != NULL; to = to->q_tchain) 500 { 501 if (rcode != EX_OK) 502 markfailure(e, to, rcode); 503 else 504 { 505 to->q_flags |= QSENT; 506 e->e_nsent++; 507 } 508 } 509 510 /* 511 ** Restore state and return. 512 */ 513 514 errno = 0; 515 define('g', (char *) NULL, e); 516 define('<', (char *) NULL, e); 517 return (rcode); 518 } 519 /* 520 ** MARKFAILURE -- mark a failure on a specific address. 521 ** 522 ** Parameters: 523 ** e -- the envelope we are sending. 524 ** q -- the address to mark. 525 ** rcode -- the code signifying the particular failure. 526 ** 527 ** Returns: 528 ** none. 529 ** 530 ** Side Effects: 531 ** marks the address (and possibly the envelope) with the 532 ** failure so that an error will be returned or 533 ** the message will be queued, as appropriate. 534 */ 535 536 markfailure(e, q, rcode) 537 register ENVELOPE *e; 538 register ADDRESS *q; 539 int rcode; 540 { 541 if (rcode == EX_OK) 542 return; 543 else if (rcode != EX_TEMPFAIL && rcode != EX_IOERR && rcode != EX_OSERR) 544 q->q_flags |= QBADADDR; 545 else if (curtime() > e->e_ctime + TimeOut) 546 { 547 extern char *pintvl(); 548 char buf[MAXLINE]; 549 550 if (!bitset(EF_TIMEOUT, e->e_flags)) 551 { 552 (void) sprintf(buf, "Cannot send message for %s", 553 pintvl(TimeOut, FALSE)); 554 if (e->e_message != NULL) 555 free(e->e_message); 556 e->e_message = newstr(buf); 557 message(Arpa_Info, buf); 558 } 559 q->q_flags |= QBADADDR; 560 e->e_flags |= EF_TIMEOUT; 561 fprintf(e->e_xfp, "421 %s... Message timed out\n", q->q_paddr); 562 } 563 else 564 q->q_flags |= QQUEUEUP; 565 } 566 /* 567 ** DOFORK -- do a fork, retrying a couple of times on failure. 568 ** 569 ** This MUST be a macro, since after a vfork we are running 570 ** two processes on the same stack!!! 571 ** 572 ** Parameters: 573 ** none. 574 ** 575 ** Returns: 576 ** From a macro??? You've got to be kidding! 577 ** 578 ** Side Effects: 579 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 580 ** pid of child in parent, zero in child. 581 ** -1 on unrecoverable error. 582 ** 583 ** Notes: 584 ** I'm awfully sorry this looks so awful. That's 585 ** vfork for you..... 586 */ 587 588 # define NFORKTRIES 5 589 590 # ifndef FORK 591 # define FORK fork 592 # endif 593 594 # define DOFORK(fORKfN) \ 595 {\ 596 register int i;\ 597 \ 598 for (i = NFORKTRIES; --i >= 0; )\ 599 {\ 600 pid = fORKfN();\ 601 if (pid >= 0)\ 602 break;\ 603 if (i > 0)\ 604 sleep((unsigned) NFORKTRIES - i);\ 605 }\ 606 } 607 /* 608 ** DOFORK -- simple fork interface to DOFORK. 609 ** 610 ** Parameters: 611 ** none. 612 ** 613 ** Returns: 614 ** pid of child in parent. 615 ** zero in child. 616 ** -1 on error. 617 ** 618 ** Side Effects: 619 ** returns twice, once in parent and once in child. 620 */ 621 622 dofork() 623 { 624 register int pid; 625 626 DOFORK(fork); 627 return (pid); 628 } 629 /* 630 ** ENDMAILER -- Wait for mailer to terminate. 631 ** 632 ** We should never get fatal errors (e.g., segmentation 633 ** violation), so we report those specially. For other 634 ** errors, we choose a status message (into statmsg), 635 ** and if it represents an error, we print it. 636 ** 637 ** Parameters: 638 ** pid -- pid of mailer. 639 ** name -- name of mailer (for error messages). 640 ** 641 ** Returns: 642 ** exit code of mailer. 643 ** 644 ** Side Effects: 645 ** none. 646 */ 647 648 endmailer(mci, name) 649 register MCI *mci; 650 char *name; 651 { 652 int st; 653 654 /* close any connections */ 655 if (mci->mci_in != NULL) 656 (void) fclose(mci->mci_in); 657 if (mci->mci_out != NULL) 658 (void) fclose(mci->mci_out); 659 mci->mci_in = mci->mci_out = NULL; 660 mci->mci_state = MCIS_CLOSED; 661 662 /* in the IPC case there is nothing to wait for */ 663 if (mci->mci_pid == 0) 664 return (EX_OK); 665 666 /* wait for the mailer process to die and collect status */ 667 st = waitfor(mci->mci_pid); 668 if (st == -1) 669 { 670 syserr("endmailer %s: wait", name); 671 return (EX_SOFTWARE); 672 } 673 674 /* see if it died a horrid death */ 675 if ((st & 0377) != 0) 676 { 677 syserr("mailer %s died with signal %o", name, st); 678 ExitStat = EX_TEMPFAIL; 679 return (EX_TEMPFAIL); 680 } 681 682 /* normal death -- return status */ 683 st = (st >> 8) & 0377; 684 return (st); 685 } 686 /* 687 ** OPENMAILER -- open connection to mailer. 688 ** 689 ** Parameters: 690 ** m -- mailer descriptor. 691 ** pvp -- parameter vector to pass to mailer. 692 ** ctladdr -- controlling address for user. 693 ** clever -- create a full duplex connection. 694 ** 695 ** Returns: 696 ** The mail connection info struct for this connection. 697 ** NULL on failure. 698 ** 699 ** Side Effects: 700 ** creates a mailer in a subprocess. 701 */ 702 703 MCI * 704 openmailer(m, pvp, ctladdr, clever, e) 705 MAILER *m; 706 char **pvp; 707 ADDRESS *ctladdr; 708 bool clever; 709 ENVELOPE *e; 710 { 711 int pid; 712 register MCI *mci; 713 int mpvect[2]; 714 int rpvect[2]; 715 extern FILE *fdopen(); 716 717 if (tTd(11, 1)) 718 { 719 printf("openmailer:"); 720 printav(pvp); 721 } 722 errno = 0; 723 724 CurHostName = m->m_mailer; 725 726 /* 727 ** Deal with the special case of mail handled through an IPC 728 ** connection. 729 ** In this case we don't actually fork. We must be 730 ** running SMTP for this to work. We will return a 731 ** zero pid to indicate that we are running IPC. 732 ** We also handle a debug version that just talks to stdin/out. 733 */ 734 735 /* check for Local Person Communication -- not for mortals!!! */ 736 if (strcmp(m->m_mailer, "[LPC]") == 0) 737 { 738 mci = (MCI *) xalloc(sizeof *mci); 739 bzero((char *) mci, sizeof *mci); 740 mci->mci_in = stdin; 741 mci->mci_out = stdout; 742 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 743 mci->mci_mailer = m; 744 } 745 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 746 strcmp(m->m_mailer, "[TCP]") == 0) 747 { 748 #ifdef DAEMON 749 register int i; 750 register u_short port; 751 char *curhost; 752 extern MCI *mci_get(); 753 extern char *hostsignature(); 754 755 CurHostName = pvp[1]; 756 curhost = hostsignature(m, pvp[1], e); 757 758 if (!clever) 759 syserr("non-clever IPC"); 760 if (pvp[2] != NULL) 761 port = atoi(pvp[2]); 762 else 763 port = 0; 764 while (*curhost != '\0') 765 { 766 register char *p; 767 char hostbuf[MAXNAME]; 768 769 /* pull the next host from the signature */ 770 p = strchr(curhost, ':'); 771 if (p == NULL) 772 p = &curhost[strlen(curhost)]; 773 strncpy(hostbuf, curhost, p - curhost); 774 hostbuf[p - curhost] = '\0'; 775 if (*p != '\0') 776 p++; 777 curhost = p; 778 779 /* see if we already know that this host is fried */ 780 CurHostName = hostbuf; 781 mci = mci_get(hostbuf, m); 782 if (mci->mci_state != MCIS_CLOSED) 783 { 784 if (tTd(11, 1)) 785 { 786 printf("openmailer: "); 787 mci_dump(mci); 788 } 789 CurHostName = mci->mci_host; 790 return mci; 791 } 792 mci->mci_mailer = m; 793 if (mci->mci_exitstat != EX_OK) 794 continue; 795 796 /* try the connection */ 797 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 798 message(Arpa_Info, "Connecting to %s (%s)...", 799 hostbuf, m->m_name); 800 i = makeconnection(hostbuf, port, mci, 801 bitnset(M_SECURE_PORT, m->m_flags)); 802 mci->mci_exitstat = i; 803 mci->mci_errno = errno; 804 if (i == EX_OK) 805 { 806 mci->mci_state = MCIS_OPENING; 807 mci_cache(mci); 808 break; 809 } 810 else if (tTd(11, 1)) 811 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 812 i, errno); 813 814 815 /* enter status of this host */ 816 setstat(i); 817 } 818 mci->mci_pid = 0; 819 #else /* no DAEMON */ 820 syserr("openmailer: no IPC"); 821 if (tTd(11, 1)) 822 printf("openmailer: NULL\n"); 823 return NULL; 824 #endif /* DAEMON */ 825 } 826 else 827 { 828 /* create a pipe to shove the mail through */ 829 if (pipe(mpvect) < 0) 830 { 831 syserr("openmailer: pipe (to mailer)"); 832 if (tTd(11, 1)) 833 printf("openmailer: NULL\n"); 834 return NULL; 835 } 836 837 /* if this mailer speaks smtp, create a return pipe */ 838 if (clever && pipe(rpvect) < 0) 839 { 840 syserr("openmailer: pipe (from mailer)"); 841 (void) close(mpvect[0]); 842 (void) close(mpvect[1]); 843 if (tTd(11, 1)) 844 printf("openmailer: NULL\n"); 845 return NULL; 846 } 847 848 /* 849 ** Actually fork the mailer process. 850 ** DOFORK is clever about retrying. 851 ** 852 ** Dispose of SIGCHLD signal catchers that may be laying 853 ** around so that endmail will get it. 854 */ 855 856 if (e->e_xfp != NULL) 857 (void) fflush(e->e_xfp); /* for debugging */ 858 (void) fflush(stdout); 859 # ifdef SIGCHLD 860 (void) signal(SIGCHLD, SIG_DFL); 861 # endif /* SIGCHLD */ 862 DOFORK(FORK); 863 /* pid is set by DOFORK */ 864 if (pid < 0) 865 { 866 /* failure */ 867 syserr("openmailer: cannot fork"); 868 (void) close(mpvect[0]); 869 (void) close(mpvect[1]); 870 if (clever) 871 { 872 (void) close(rpvect[0]); 873 (void) close(rpvect[1]); 874 } 875 if (tTd(11, 1)) 876 printf("openmailer: NULL\n"); 877 return NULL; 878 } 879 else if (pid == 0) 880 { 881 int i; 882 int saveerrno; 883 char *env[2]; 884 extern int DtableSize; 885 886 /* child -- set up input & exec mailer */ 887 /* make diagnostic output be standard output */ 888 (void) signal(SIGINT, SIG_IGN); 889 (void) signal(SIGHUP, SIG_IGN); 890 (void) signal(SIGTERM, SIG_DFL); 891 892 /* arrange to filter std & diag output of command */ 893 if (clever) 894 { 895 (void) close(rpvect[0]); 896 (void) close(1); 897 (void) dup(rpvect[1]); 898 (void) close(rpvect[1]); 899 } 900 else if (OpMode == MD_SMTP || HoldErrs) 901 { 902 /* put mailer output in transcript */ 903 (void) close(1); 904 (void) dup(fileno(e->e_xfp)); 905 } 906 (void) close(2); 907 (void) dup(1); 908 909 /* arrange to get standard input */ 910 (void) close(mpvect[1]); 911 (void) close(0); 912 if (dup(mpvect[0]) < 0) 913 { 914 syserr("Cannot dup to zero!"); 915 _exit(EX_OSERR); 916 } 917 (void) close(mpvect[0]); 918 if (!bitnset(M_RESTR, m->m_flags)) 919 { 920 if (ctladdr == NULL || ctladdr->q_uid == 0) 921 { 922 (void) setgid(DefGid); 923 #ifndef SYSTEM5 924 (void) initgroups(DefUser, DefGid); 925 #endif 926 (void) setuid(DefUid); 927 } 928 else 929 { 930 (void) setgid(ctladdr->q_gid); 931 #ifndef SYSTEM5 932 (void) initgroups(ctladdr->q_ruser? 933 ctladdr->q_ruser: ctladdr->q_user, 934 ctladdr->q_gid); 935 #endif 936 (void) setuid(ctladdr->q_uid); 937 } 938 } 939 940 /* arrange for all the files to be closed */ 941 for (i = 3; i < DtableSize; i++) 942 { 943 register int j; 944 if ((j = fcntl(i, F_GETFD, 0)) != -1) 945 (void)fcntl(i, F_SETFD, j|1); 946 } 947 948 /* try to execute the mailer */ 949 env[0] = "AGENT=sendmail"; 950 env[1] = NULL; 951 execve(m->m_mailer, pvp, env); 952 saveerrno = errno; 953 syserr("Cannot exec %s", m->m_mailer); 954 if (m == LocalMailer) 955 _exit(EX_TEMPFAIL); 956 switch (saveerrno) 957 { 958 case EIO: 959 case EAGAIN: 960 case ENOMEM: 961 # ifdef EPROCLIM 962 case EPROCLIM: 963 # endif 964 _exit(EX_TEMPFAIL); 965 } 966 _exit(EX_UNAVAILABLE); 967 } 968 969 /* 970 ** Set up return value. 971 */ 972 973 mci = (MCI *) xalloc(sizeof *mci); 974 bzero((char *) mci, sizeof *mci); 975 mci->mci_mailer = m; 976 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 977 mci->mci_pid = pid; 978 (void) close(mpvect[0]); 979 mci->mci_out = fdopen(mpvect[1], "w"); 980 if (clever) 981 { 982 (void) close(rpvect[1]); 983 mci->mci_in = fdopen(rpvect[0], "r"); 984 } 985 else 986 { 987 mci->mci_flags |= MCIF_TEMP; 988 mci->mci_in = NULL; 989 } 990 } 991 992 /* 993 ** If we are in SMTP opening state, send initial protocol. 994 */ 995 996 if (clever && mci->mci_state != MCIS_CLOSED) 997 { 998 smtpinit(m, mci, e); 999 } 1000 if (tTd(11, 1)) 1001 { 1002 printf("openmailer: "); 1003 mci_dump(mci); 1004 } 1005 1006 return mci; 1007 } 1008 /* 1009 ** GIVERESPONSE -- Interpret an error response from a mailer 1010 ** 1011 ** Parameters: 1012 ** stat -- the status code from the mailer (high byte 1013 ** only; core dumps must have been taken care of 1014 ** already). 1015 ** m -- the mailer descriptor for this mailer. 1016 ** 1017 ** Returns: 1018 ** none. 1019 ** 1020 ** Side Effects: 1021 ** Errors may be incremented. 1022 ** ExitStat may be set. 1023 */ 1024 1025 giveresponse(stat, m, e) 1026 int stat; 1027 register MAILER *m; 1028 ENVELOPE *e; 1029 { 1030 register char *statmsg; 1031 extern char *SysExMsg[]; 1032 register int i; 1033 extern int N_SysEx; 1034 #ifdef NAMED_BIND 1035 extern int h_errno; 1036 #endif 1037 char buf[MAXLINE]; 1038 1039 #ifdef lint 1040 if (m == NULL) 1041 return; 1042 #endif lint 1043 1044 /* 1045 ** Compute status message from code. 1046 */ 1047 1048 i = stat - EX__BASE; 1049 if (stat == 0) 1050 statmsg = "250 Sent"; 1051 else if (i < 0 || i > N_SysEx) 1052 { 1053 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1054 stat = EX_UNAVAILABLE; 1055 statmsg = buf; 1056 } 1057 else if (stat == EX_TEMPFAIL) 1058 { 1059 (void) strcpy(buf, SysExMsg[i]); 1060 #ifdef NAMED_BIND 1061 if (h_errno == TRY_AGAIN) 1062 { 1063 extern char *errstring(); 1064 1065 statmsg = errstring(h_errno+MAX_ERRNO); 1066 } 1067 else 1068 #endif 1069 { 1070 if (errno != 0) 1071 { 1072 extern char *errstring(); 1073 1074 statmsg = errstring(errno); 1075 } 1076 else 1077 { 1078 #ifdef SMTP 1079 extern char SmtpError[]; 1080 1081 statmsg = SmtpError; 1082 #else /* SMTP */ 1083 statmsg = NULL; 1084 #endif /* SMTP */ 1085 } 1086 } 1087 if (statmsg != NULL && statmsg[0] != '\0') 1088 { 1089 (void) strcat(buf, ": "); 1090 (void) strcat(buf, statmsg); 1091 } 1092 statmsg = buf; 1093 } 1094 else 1095 { 1096 statmsg = SysExMsg[i]; 1097 } 1098 1099 /* 1100 ** Print the message as appropriate 1101 */ 1102 1103 if (stat == EX_OK || stat == EX_TEMPFAIL) 1104 message(Arpa_Info, &statmsg[4]); 1105 else 1106 { 1107 Errors++; 1108 usrerr(statmsg); 1109 } 1110 1111 /* 1112 ** Final cleanup. 1113 ** Log a record of the transaction. Compute the new 1114 ** ExitStat -- if we already had an error, stick with 1115 ** that. 1116 */ 1117 1118 if (LogLevel > ((stat == 0 || stat == EX_TEMPFAIL) ? 3 : 2)) 1119 logdelivery(&statmsg[4], e); 1120 1121 if (stat != EX_TEMPFAIL) 1122 setstat(stat); 1123 if (stat != EX_OK) 1124 { 1125 if (e->e_message != NULL) 1126 free(e->e_message); 1127 e->e_message = newstr(&statmsg[4]); 1128 } 1129 errno = 0; 1130 #ifdef NAMED_BIND 1131 h_errno = 0; 1132 #endif 1133 } 1134 /* 1135 ** LOGDELIVERY -- log the delivery in the system log 1136 ** 1137 ** Parameters: 1138 ** stat -- the message to print for the status 1139 ** 1140 ** Returns: 1141 ** none 1142 ** 1143 ** Side Effects: 1144 ** none 1145 */ 1146 1147 logdelivery(stat, e) 1148 char *stat; 1149 register ENVELOPE *e; 1150 { 1151 extern char *pintvl(); 1152 1153 # ifdef LOG 1154 syslog(LOG_INFO, "%s: to=%s, delay=%s, stat=%s", e->e_id, 1155 e->e_to, pintvl(curtime() - e->e_ctime, TRUE), stat); 1156 # endif /* LOG */ 1157 } 1158 /* 1159 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1160 ** 1161 ** This can be made an arbitrary message separator by changing $l 1162 ** 1163 ** One of the ugliest hacks seen by human eyes is contained herein: 1164 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1165 ** does a well-meaning programmer such as myself have to deal with 1166 ** this kind of antique garbage???? 1167 ** 1168 ** Parameters: 1169 ** fp -- the file to output to. 1170 ** m -- the mailer describing this entry. 1171 ** 1172 ** Returns: 1173 ** none 1174 ** 1175 ** Side Effects: 1176 ** outputs some text to fp. 1177 */ 1178 1179 putfromline(fp, m, e) 1180 register FILE *fp; 1181 register MAILER *m; 1182 ENVELOPE *e; 1183 { 1184 char *template = "\001l\n"; 1185 char buf[MAXLINE]; 1186 1187 if (bitnset(M_NHDR, m->m_flags)) 1188 return; 1189 1190 # ifdef UGLYUUCP 1191 if (bitnset(M_UGLYUUCP, m->m_flags)) 1192 { 1193 char *bang; 1194 char xbuf[MAXLINE]; 1195 1196 expand("\001<", buf, &buf[sizeof buf - 1], e); 1197 bang = strchr(buf, '!'); 1198 if (bang == NULL) 1199 syserr("No ! in UUCP! (%s)", buf); 1200 else 1201 { 1202 *bang++ = '\0'; 1203 (void) sprintf(xbuf, "From %s \001d remote from %s\n", bang, buf); 1204 template = xbuf; 1205 } 1206 } 1207 # endif /* UGLYUUCP */ 1208 expand(template, buf, &buf[sizeof buf - 1], e); 1209 putline(buf, fp, m); 1210 } 1211 /* 1212 ** PUTBODY -- put the body of a message. 1213 ** 1214 ** Parameters: 1215 ** fp -- file to output onto. 1216 ** m -- a mailer descriptor to control output format. 1217 ** e -- the envelope to put out. 1218 ** 1219 ** Returns: 1220 ** none. 1221 ** 1222 ** Side Effects: 1223 ** The message is written onto fp. 1224 */ 1225 1226 putbody(fp, m, e) 1227 FILE *fp; 1228 MAILER *m; 1229 register ENVELOPE *e; 1230 { 1231 char buf[MAXLINE]; 1232 1233 /* 1234 ** Output the body of the message 1235 */ 1236 1237 if (e->e_dfp == NULL) 1238 { 1239 if (e->e_df != NULL) 1240 { 1241 e->e_dfp = fopen(e->e_df, "r"); 1242 if (e->e_dfp == NULL) 1243 syserr("putbody: Cannot open %s for %s from %s", 1244 e->e_df, e->e_to, e->e_from); 1245 } 1246 else 1247 putline("<<< No Message Collected >>>", fp, m); 1248 } 1249 if (e->e_dfp != NULL) 1250 { 1251 rewind(e->e_dfp); 1252 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1253 { 1254 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1255 strncmp(buf, "From ", 5) == 0) 1256 (void) putc('>', fp); 1257 putline(buf, fp, m); 1258 } 1259 1260 if (ferror(e->e_dfp)) 1261 { 1262 syserr("putbody: read error"); 1263 ExitStat = EX_IOERR; 1264 } 1265 } 1266 1267 (void) fflush(fp); 1268 if (ferror(fp) && errno != EPIPE) 1269 { 1270 syserr("putbody: write error"); 1271 ExitStat = EX_IOERR; 1272 } 1273 errno = 0; 1274 } 1275 /* 1276 ** MAILFILE -- Send a message to a file. 1277 ** 1278 ** If the file has the setuid/setgid bits set, but NO execute 1279 ** bits, sendmail will try to become the owner of that file 1280 ** rather than the real user. Obviously, this only works if 1281 ** sendmail runs as root. 1282 ** 1283 ** This could be done as a subordinate mailer, except that it 1284 ** is used implicitly to save messages in ~/dead.letter. We 1285 ** view this as being sufficiently important as to include it 1286 ** here. For example, if the system is dying, we shouldn't have 1287 ** to create another process plus some pipes to save the message. 1288 ** 1289 ** Parameters: 1290 ** filename -- the name of the file to send to. 1291 ** ctladdr -- the controlling address header -- includes 1292 ** the userid/groupid to be when sending. 1293 ** 1294 ** Returns: 1295 ** The exit code associated with the operation. 1296 ** 1297 ** Side Effects: 1298 ** none. 1299 */ 1300 1301 mailfile(filename, ctladdr, e) 1302 char *filename; 1303 ADDRESS *ctladdr; 1304 register ENVELOPE *e; 1305 { 1306 register FILE *f; 1307 register int pid; 1308 int mode; 1309 1310 /* 1311 ** Fork so we can change permissions here. 1312 ** Note that we MUST use fork, not vfork, because of 1313 ** the complications of calling subroutines, etc. 1314 */ 1315 1316 DOFORK(fork); 1317 1318 if (pid < 0) 1319 return (EX_OSERR); 1320 else if (pid == 0) 1321 { 1322 /* child -- actually write to file */ 1323 struct stat stb; 1324 1325 (void) signal(SIGINT, SIG_DFL); 1326 (void) signal(SIGHUP, SIG_DFL); 1327 (void) signal(SIGTERM, SIG_DFL); 1328 (void) umask(OldUmask); 1329 1330 if (stat(filename, &stb) < 0) 1331 stb.st_mode = 0666; 1332 mode = stb.st_mode; 1333 1334 /* limit the errors to those actually caused in the child */ 1335 errno = 0; 1336 ExitStat = EX_OK; 1337 1338 if (bitset(0111, stb.st_mode)) 1339 exit(EX_CANTCREAT); 1340 if (ctladdr == NULL) 1341 ctladdr = &e->e_from; 1342 else 1343 { 1344 /* ignore setuid and setgid bits */ 1345 mode &= ~(S_ISGID|S_ISUID); 1346 } 1347 1348 /* we have to open the dfile BEFORE setuid */ 1349 if (e->e_dfp == NULL && e->e_df != NULL) 1350 { 1351 e->e_dfp = fopen(e->e_df, "r"); 1352 if (e->e_dfp == NULL) 1353 { 1354 syserr("mailfile: Cannot open %s for %s from %s", 1355 e->e_df, e->e_to, e->e_from); 1356 } 1357 } 1358 1359 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1360 { 1361 if (ctladdr->q_uid == 0) 1362 { 1363 (void) setgid(DefGid); 1364 #ifndef SYSTEM5 1365 (void) initgroups(DefUser, DefGid); 1366 #endif 1367 } 1368 else 1369 { 1370 (void) setgid(ctladdr->q_gid); 1371 #ifndef SYSTEM5 1372 (void) initgroups(ctladdr->q_ruser ? 1373 ctladdr->q_ruser : ctladdr->q_user, 1374 ctladdr->q_gid); 1375 #endif 1376 } 1377 } 1378 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1379 { 1380 if (ctladdr->q_uid == 0) 1381 (void) setuid(DefUid); 1382 else 1383 (void) setuid(ctladdr->q_uid); 1384 } 1385 FileName = filename; 1386 LineNumber = 0; 1387 f = dfopen(filename, "a"); 1388 if (f == NULL) 1389 { 1390 message("cannot open"); 1391 exit(EX_CANTCREAT); 1392 } 1393 1394 putfromline(f, ProgMailer, e); 1395 (*e->e_puthdr)(f, ProgMailer, e); 1396 putline("\n", f, ProgMailer); 1397 (*e->e_putbody)(f, ProgMailer, e); 1398 putline("\n", f, ProgMailer); 1399 if (ferror(f)) 1400 { 1401 message("I/O error"); 1402 setstat(EX_IOERR); 1403 } 1404 (void) fclose(f); 1405 (void) fflush(stdout); 1406 1407 /* reset ISUID & ISGID bits for paranoid systems */ 1408 (void) chmod(filename, (int) stb.st_mode); 1409 exit(ExitStat); 1410 /*NOTREACHED*/ 1411 } 1412 else 1413 { 1414 /* parent -- wait for exit status */ 1415 int st; 1416 1417 st = waitfor(pid); 1418 if ((st & 0377) != 0) 1419 return (EX_UNAVAILABLE); 1420 else 1421 return ((st >> 8) & 0377); 1422 /*NOTREACHED*/ 1423 } 1424 } 1425 /* 1426 ** SENDALL -- actually send all the messages. 1427 ** 1428 ** Parameters: 1429 ** e -- the envelope to send. 1430 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1431 ** the current SendMode. 1432 ** 1433 ** Returns: 1434 ** none. 1435 ** 1436 ** Side Effects: 1437 ** Scans the send lists and sends everything it finds. 1438 ** Delivers any appropriate error messages. 1439 ** If we are running in a non-interactive mode, takes the 1440 ** appropriate action. 1441 */ 1442 1443 sendall(e, mode) 1444 ENVELOPE *e; 1445 char mode; 1446 { 1447 register ADDRESS *q; 1448 bool oldverbose; 1449 int pid; 1450 # ifdef LOCKF 1451 struct flock lfd; 1452 # endif 1453 1454 /* determine actual delivery mode */ 1455 if (mode == SM_DEFAULT) 1456 { 1457 extern bool shouldqueue(); 1458 1459 if (shouldqueue(e->e_msgpriority, e->e_ctime)) 1460 mode = SM_QUEUE; 1461 else 1462 mode = SendMode; 1463 } 1464 1465 if (tTd(13, 1)) 1466 { 1467 printf("\nSENDALL: mode %c, sendqueue:\n", mode); 1468 printaddr(e->e_sendqueue, TRUE); 1469 } 1470 1471 /* 1472 ** Do any preprocessing necessary for the mode we are running. 1473 ** Check to make sure the hop count is reasonable. 1474 ** Delete sends to the sender in mailing lists. 1475 */ 1476 1477 CurEnv = e; 1478 1479 if (e->e_hopcount > MaxHopCount) 1480 { 1481 errno = 0; 1482 syserr("sendall: too many hops %d (%d max): from %s, to %s", 1483 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 1484 e->e_sendqueue->q_paddr); 1485 return; 1486 } 1487 1488 if (!MeToo) 1489 { 1490 extern ADDRESS *recipient(); 1491 1492 e->e_from.q_flags |= QDONTSEND; 1493 if (tTd(13, 5)) 1494 { 1495 printf("sendall: QDONTSEND "); 1496 printaddr(&e->e_from, FALSE); 1497 } 1498 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1499 } 1500 1501 # ifdef QUEUE 1502 if ((mode == SM_QUEUE || mode == SM_FORK || 1503 (mode != SM_VERIFY && SuperSafe)) && 1504 !bitset(EF_INQUEUE, e->e_flags)) 1505 queueup(e, TRUE, mode == SM_QUEUE); 1506 #endif /* QUEUE */ 1507 1508 oldverbose = Verbose; 1509 switch (mode) 1510 { 1511 case SM_VERIFY: 1512 Verbose = TRUE; 1513 break; 1514 1515 case SM_QUEUE: 1516 queueonly: 1517 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1518 return; 1519 1520 case SM_FORK: 1521 if (e->e_xfp != NULL) 1522 (void) fflush(e->e_xfp); 1523 1524 # ifdef LOCKF 1525 /* 1526 ** Since lockf has the interesting semantic that the 1527 ** lock is lost when we fork, we have to risk losing 1528 ** the lock here by closing before the fork, and then 1529 ** trying to get it back in the child. 1530 */ 1531 1532 if (e->e_lockfp != NULL) 1533 { 1534 (void) fclose(e->e_lockfp); 1535 e->e_lockfp = NULL; 1536 } 1537 # endif /* LOCKF */ 1538 1539 pid = fork(); 1540 if (pid < 0) 1541 { 1542 goto queueonly; 1543 } 1544 else if (pid > 0) 1545 { 1546 /* be sure we leave the temp files to our child */ 1547 e->e_id = e->e_df = NULL; 1548 # ifndef LOCKF 1549 if (e->e_lockfp != NULL) 1550 { 1551 (void) fclose(e->e_lockfp); 1552 e->e_lockfp = NULL; 1553 } 1554 # endif 1555 1556 /* close any random open files in the envelope */ 1557 if (e->e_dfp != NULL) 1558 { 1559 (void) fclose(e->e_dfp); 1560 e->e_dfp = NULL; 1561 } 1562 if (e->e_xfp != NULL) 1563 { 1564 (void) fclose(e->e_xfp); 1565 e->e_xfp = NULL; 1566 } 1567 return; 1568 } 1569 1570 /* double fork to avoid zombies */ 1571 if (fork() > 0) 1572 exit(EX_OK); 1573 1574 /* be sure we are immune from the terminal */ 1575 disconnect(FALSE); 1576 1577 # ifdef LOCKF 1578 /* 1579 ** Now try to get our lock back. 1580 */ 1581 1582 lfd.l_type = F_WRLCK; 1583 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1584 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1585 if (e->e_lockfp == NULL || 1586 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1587 { 1588 /* oops.... lost it */ 1589 # ifdef LOG 1590 if (LogLevel > 5) 1591 syslog(LOG_NOTICE, "%s: lost lock: %m", 1592 e->e_id); 1593 # endif /* LOG */ 1594 exit(EX_OK); 1595 } 1596 # endif /* LOCKF */ 1597 1598 break; 1599 } 1600 1601 /* 1602 ** Run through the list and send everything. 1603 */ 1604 1605 e->e_nsent = 0; 1606 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1607 { 1608 if (mode == SM_VERIFY) 1609 { 1610 e->e_to = q->q_paddr; 1611 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1612 message(Arpa_Info, "deliverable"); 1613 } 1614 else if (!bitset(QDONTSEND, q->q_flags)) 1615 { 1616 # ifdef QUEUE 1617 /* 1618 ** Checkpoint the send list every few addresses 1619 */ 1620 1621 if (e->e_nsent >= CheckpointInterval) 1622 { 1623 queueup(e, TRUE, FALSE); 1624 e->e_nsent = 0; 1625 } 1626 # endif /* QUEUE */ 1627 (void) deliver(e, q); 1628 } 1629 } 1630 Verbose = oldverbose; 1631 1632 /* 1633 ** Now run through and check for errors. 1634 */ 1635 1636 if (mode == SM_VERIFY) 1637 return; 1638 1639 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1640 { 1641 register ADDRESS *qq; 1642 1643 if (tTd(13, 3)) 1644 { 1645 printf("Checking "); 1646 printaddr(q, FALSE); 1647 } 1648 1649 /* only send errors if the message failed */ 1650 if (!bitset(QBADADDR, q->q_flags)) 1651 continue; 1652 1653 /* we have an address that failed -- find the parent */ 1654 for (qq = q; qq != NULL; qq = qq->q_alias) 1655 { 1656 char obuf[MAXNAME + 6]; 1657 extern char *aliaslookup(); 1658 1659 /* we can only have owners for local addresses */ 1660 if (!bitnset(M_LOCAL, qq->q_mailer->m_flags)) 1661 continue; 1662 1663 /* see if the owner list exists */ 1664 (void) strcpy(obuf, "owner-"); 1665 if (strncmp(qq->q_user, "owner-", 6) == 0) 1666 (void) strcat(obuf, "owner"); 1667 else 1668 (void) strcat(obuf, qq->q_user); 1669 if (!bitnset(M_USR_UPPER, qq->q_mailer->m_flags)) 1670 makelower(obuf); 1671 if (aliaslookup(obuf) == NULL) 1672 continue; 1673 1674 if (tTd(13, 4)) 1675 printf("Errors to %s\n", obuf); 1676 1677 /* owner list exists -- add it to the error queue */ 1678 sendtolist(obuf, (ADDRESS *) NULL, &e->e_errorqueue, e); 1679 1680 /* and set the return path to point to it */ 1681 e->e_returnpath = newstr(obuf); 1682 1683 ErrorMode = EM_MAIL; 1684 break; 1685 } 1686 1687 /* if we did not find an owner, send to the sender */ 1688 if (qq == NULL && bitset(QBADADDR, q->q_flags)) 1689 sendtolist(e->e_from.q_paddr, qq, &e->e_errorqueue, e); 1690 } 1691 1692 if (mode == SM_FORK) 1693 finis(); 1694 } 1695 /* 1696 ** HOSTSIGNATURE -- return the "signature" for a host. 1697 ** 1698 ** The signature describes how we are going to send this -- it 1699 ** can be just the hostname (for non-Internet hosts) or can be 1700 ** an ordered list of MX hosts. 1701 ** 1702 ** Parameters: 1703 ** m -- the mailer describing this host. 1704 ** host -- the host name. 1705 ** e -- the current envelope. 1706 ** 1707 ** Returns: 1708 ** The signature for this host. 1709 ** 1710 ** Side Effects: 1711 ** Can tweak the symbol table. 1712 */ 1713 1714 char * 1715 hostsignature(m, host, e) 1716 register MAILER *m; 1717 char *host; 1718 ENVELOPE *e; 1719 { 1720 register char *p; 1721 register STAB *s; 1722 int i; 1723 int len; 1724 #ifdef NAMED_BIND 1725 int nmx; 1726 auto int rcode; 1727 char *mxhosts[MAXMXHOSTS + 1]; 1728 static char myhostbuf[MAXNAME]; 1729 #endif 1730 1731 /* 1732 ** Check to see if this uses IPC -- if not, it can't have MX records. 1733 */ 1734 1735 p = m->m_mailer; 1736 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1737 { 1738 /* just an ordinary mailer */ 1739 return host; 1740 } 1741 1742 /* 1743 ** If it is a numeric address, just return it. 1744 */ 1745 1746 if (host[0] == '[') 1747 return host; 1748 1749 /* 1750 ** Look it up in the symbol table. 1751 */ 1752 1753 s = stab(host, ST_HOSTSIG, ST_ENTER); 1754 if (s->s_hostsig != NULL) 1755 return s->s_hostsig; 1756 1757 /* 1758 ** Not already there -- create a signature. 1759 */ 1760 1761 #ifdef NAMED_BIND 1762 if (myhostbuf[0] == '\0') 1763 expand("\001j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1764 1765 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1766 if (nmx <= 0) 1767 { 1768 register MCI *mci; 1769 extern int errno; 1770 extern MCI *mci_get(); 1771 1772 /* update the connection info for this host */ 1773 mci = mci_get(host, m); 1774 mci->mci_exitstat = rcode; 1775 mci->mci_errno = errno; 1776 1777 /* and return the original host name as the signature */ 1778 s->s_hostsig = host; 1779 return host; 1780 } 1781 1782 len = 0; 1783 for (i = 0; i < nmx; i++) 1784 { 1785 len += strlen(mxhosts[i]) + 1; 1786 } 1787 s->s_hostsig = p = xalloc(len); 1788 for (i = 0; i < nmx; i++) 1789 { 1790 if (i != 0) 1791 *p++ = ':'; 1792 strcpy(p, mxhosts[i]); 1793 p += strlen(p); 1794 } 1795 makelower(s->s_hostsig); 1796 #else 1797 /* not using BIND -- the signature is just the host name */ 1798 s->s_hostsig = host; 1799 #endif 1800 if (tTd(17, 1)) 1801 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1802 return s->s_hostsig; 1803 } 1804