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 6.40 (Berkeley) 03/07/93"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <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|QQUEUEUP, 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|QQUEUEUP, to->q_flags) || 110 to->q_mailer != m) 111 continue; 112 to->q_flags |= QQUEUEUP|QDONTSEND; 113 e->e_to = to->q_paddr; 114 message("queued"); 115 if (LogLevel > 8) 116 logdelivery(m, NULL, "queued", e); 117 } 118 e->e_to = NULL; 119 return (0); 120 } 121 122 /* 123 ** Do initial argv setup. 124 ** Insert the mailer name. Notice that $x expansion is 125 ** NOT done on the mailer name. Then, if the mailer has 126 ** a picky -f flag, we insert it as appropriate. This 127 ** code does not check for 'pv' overflow; this places a 128 ** manifest lower limit of 4 for MAXPV. 129 ** The from address rewrite is expected to make 130 ** the address relative to the other end. 131 */ 132 133 /* rewrite from address, using rewriting rules */ 134 (void) strcpy(rpathbuf, remotename(e->e_returnpath, m, TRUE, FALSE, 135 TRUE, FALSE, e)); 136 if (e->e_returnpath == e->e_sender) 137 { 138 from = rpathbuf; 139 } 140 else 141 { 142 (void) strcpy(tfrombuf, remotename(e->e_sender, m, TRUE, FALSE, 143 TRUE, FALSE, e)); 144 from = tfrombuf; 145 } 146 147 define('f', e->e_returnpath, e); /* raw return path */ 148 define('<', rpathbuf, e); /* translated return path */ 149 define('g', from, e); /* translated sender */ 150 define('h', host, e); /* to host */ 151 Errors = 0; 152 pvp = pv; 153 *pvp++ = m->m_argv[0]; 154 155 /* insert -f or -r flag as appropriate */ 156 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 157 { 158 if (bitnset(M_FOPT, m->m_flags)) 159 *pvp++ = "-f"; 160 else 161 *pvp++ = "-r"; 162 *pvp++ = newstr(rpathbuf); 163 } 164 165 /* 166 ** Append the other fixed parts of the argv. These run 167 ** up to the first entry containing "$u". There can only 168 ** be one of these, and there are only a few more slots 169 ** in the pv after it. 170 */ 171 172 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 173 { 174 /* can't use strchr here because of sign extension problems */ 175 while (*p != '\0') 176 { 177 if ((*p++ & 0377) == MACROEXPAND) 178 { 179 if (*p == 'u') 180 break; 181 } 182 } 183 184 if (*p != '\0') 185 break; 186 187 /* this entry is safe -- go ahead and process it */ 188 expand(*mvp, buf, &buf[sizeof buf - 1], e); 189 *pvp++ = newstr(buf); 190 if (pvp >= &pv[MAXPV - 3]) 191 { 192 syserr("554 Too many parameters to %s before $u", pv[0]); 193 return (-1); 194 } 195 } 196 197 /* 198 ** If we have no substitution for the user name in the argument 199 ** list, we know that we must supply the names otherwise -- and 200 ** SMTP is the answer!! 201 */ 202 203 if (*mvp == NULL) 204 { 205 /* running SMTP */ 206 # ifdef SMTP 207 clever = TRUE; 208 *pvp = NULL; 209 # else /* SMTP */ 210 /* oops! we don't implement SMTP */ 211 syserr("554 SMTP style mailer"); 212 return (EX_SOFTWARE); 213 # endif /* SMTP */ 214 } 215 216 /* 217 ** At this point *mvp points to the argument with $u. We 218 ** run through our address list and append all the addresses 219 ** we can. If we run out of space, do not fret! We can 220 ** always send another copy later. 221 */ 222 223 tobuf[0] = '\0'; 224 e->e_to = tobuf; 225 ctladdr = NULL; 226 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 227 for (; to != NULL; to = to->q_next) 228 { 229 /* avoid sending multiple recipients to dumb mailers */ 230 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 231 break; 232 233 /* if already sent or not for this host, don't send */ 234 if (bitset(QDONTSEND|QQUEUEUP, to->q_flags) || 235 to->q_mailer != firstto->q_mailer || 236 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 237 continue; 238 239 /* avoid overflowing tobuf */ 240 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 241 break; 242 243 if (tTd(10, 1)) 244 { 245 printf("\nsend to "); 246 printaddr(to, FALSE); 247 } 248 249 /* compute effective uid/gid when sending */ 250 if (to->q_mailer == ProgMailer) 251 ctladdr = getctladdr(to); 252 253 user = to->q_user; 254 e->e_to = to->q_paddr; 255 to->q_flags |= QDONTSEND; 256 if (tTd(10, 5)) 257 { 258 printf("deliver: QDONTSEND "); 259 printaddr(to, FALSE); 260 } 261 262 /* 263 ** Check to see that these people are allowed to 264 ** talk to each other. 265 */ 266 267 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 268 { 269 NoReturn = TRUE; 270 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 271 giveresponse(EX_UNAVAILABLE, m, NULL, e); 272 continue; 273 } 274 rcode = checkcompat(to, e); 275 if (rcode != EX_OK) 276 { 277 giveresponse(rcode, m, NULL, e); 278 continue; 279 } 280 281 /* 282 ** Strip quote bits from names if the mailer is dumb 283 ** about them. 284 */ 285 286 if (bitnset(M_STRIPQ, m->m_flags)) 287 { 288 stripquotes(user); 289 stripquotes(host); 290 } 291 292 /* hack attack -- delivermail compatibility */ 293 if (m == ProgMailer && *user == '|') 294 user++; 295 296 /* 297 ** If an error message has already been given, don't 298 ** bother to send to this address. 299 ** 300 ** >>>>>>>>>> This clause assumes that the local mailer 301 ** >> NOTE >> cannot do any further aliasing; that 302 ** >>>>>>>>>> function is subsumed by sendmail. 303 */ 304 305 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 306 continue; 307 308 /* save statistics.... */ 309 markstats(e, to); 310 311 /* 312 ** See if this user name is "special". 313 ** If the user name has a slash in it, assume that this 314 ** is a file -- send it off without further ado. Note 315 ** that this type of addresses is not processed along 316 ** with the others, so we fudge on the To person. 317 */ 318 319 if (m == FileMailer) 320 { 321 rcode = mailfile(user, getctladdr(to), e); 322 giveresponse(rcode, m, NULL, e); 323 if (rcode == EX_OK) 324 to->q_flags |= QSENT; 325 continue; 326 } 327 328 /* 329 ** Address is verified -- add this user to mailer 330 ** argv, and add it to the print list of recipients. 331 */ 332 333 /* link together the chain of recipients */ 334 to->q_tchain = tochain; 335 tochain = to; 336 337 /* create list of users for error messages */ 338 (void) strcat(tobuf, ","); 339 (void) strcat(tobuf, to->q_paddr); 340 define('u', user, e); /* to user */ 341 define('z', to->q_home, e); /* user's home */ 342 343 /* 344 ** Expand out this user into argument list. 345 */ 346 347 if (!clever) 348 { 349 expand(*mvp, buf, &buf[sizeof buf - 1], e); 350 *pvp++ = newstr(buf); 351 if (pvp >= &pv[MAXPV - 2]) 352 { 353 /* allow some space for trailing parms */ 354 break; 355 } 356 } 357 } 358 359 /* see if any addresses still exist */ 360 if (tobuf[0] == '\0') 361 { 362 define('g', (char *) NULL, e); 363 define('<', (char *) NULL, e); 364 return (0); 365 } 366 367 /* print out messages as full list */ 368 e->e_to = tobuf + 1; 369 370 /* 371 ** Fill out any parameters after the $u parameter. 372 */ 373 374 while (!clever && *++mvp != NULL) 375 { 376 expand(*mvp, buf, &buf[sizeof buf - 1], e); 377 *pvp++ = newstr(buf); 378 if (pvp >= &pv[MAXPV]) 379 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 380 } 381 *pvp++ = NULL; 382 383 /* 384 ** Call the mailer. 385 ** The argument vector gets built, pipes 386 ** are created as necessary, and we fork & exec as 387 ** appropriate. 388 ** If we are running SMTP, we just need to clean up. 389 */ 390 391 if (ctladdr == NULL && m != ProgMailer) 392 ctladdr = &e->e_from; 393 #ifdef NAMED_BIND 394 if (ConfigLevel < 2) 395 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 396 #endif 397 mci = openmailer(m, pv, ctladdr, clever, e); 398 if (mci == NULL) 399 { 400 /* catastrophic error */ 401 rcode = EX_OSERR; 402 goto give_up; 403 } 404 else if (mci->mci_state != MCIS_OPEN) 405 { 406 /* couldn't open the mailer */ 407 rcode = mci->mci_exitstat; 408 errno = mci->mci_errno; 409 if (rcode == EX_OK) 410 { 411 /* shouldn't happen */ 412 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 413 rcode, mci->mci_state, firstsig); 414 rcode = EX_SOFTWARE; 415 } 416 } 417 else if (!clever) 418 { 419 /* 420 ** Format and send message. 421 */ 422 423 putfromline(mci->mci_out, m, e); 424 (*e->e_puthdr)(mci->mci_out, m, e); 425 putline("\n", mci->mci_out, m); 426 (*e->e_putbody)(mci->mci_out, m, e); 427 428 /* get the exit status */ 429 rcode = endmailer(mci, pv[0]); 430 } 431 else 432 #ifdef SMTP 433 { 434 /* 435 ** Send the MAIL FROM: protocol 436 */ 437 438 rcode = smtpmailfrom(m, mci, e); 439 if (rcode == EX_OK) 440 { 441 register char *t = tobuf; 442 register int i; 443 444 /* send the recipient list */ 445 tobuf[0] = '\0'; 446 for (to = tochain; to != NULL; to = to->q_tchain) 447 { 448 e->e_to = to->q_paddr; 449 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 450 { 451 markfailure(e, to, i); 452 giveresponse(i, m, mci, e); 453 } 454 else 455 { 456 *t++ = ','; 457 for (p = to->q_paddr; *p; *t++ = *p++) 458 continue; 459 } 460 } 461 462 /* now send the data */ 463 if (tobuf[0] == '\0') 464 { 465 e->e_to = NULL; 466 if (bitset(MCIF_CACHED, mci->mci_flags)) 467 smtprset(m, mci, e); 468 } 469 else 470 { 471 e->e_to = tobuf + 1; 472 rcode = smtpdata(m, mci, e); 473 } 474 475 /* now close the connection */ 476 if (!bitset(MCIF_CACHED, mci->mci_flags)) 477 smtpquit(m, mci, e); 478 } 479 } 480 #else /* not SMTP */ 481 { 482 syserr("554 deliver: need SMTP compiled to use clever mailer"); 483 rcode = EX_CONFIG; 484 goto give_up; 485 } 486 #endif /* SMTP */ 487 #ifdef NAMED_BIND 488 if (ConfigLevel < 2) 489 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 490 #endif 491 492 /* arrange a return receipt if requested */ 493 if (e->e_receiptto != NULL && bitnset(M_LOCALMAILER, m->m_flags)) 494 { 495 e->e_flags |= EF_SENDRECEIPT; 496 /* do we want to send back more info? */ 497 } 498 499 /* 500 ** Do final status disposal. 501 ** We check for something in tobuf for the SMTP case. 502 ** If we got a temporary failure, arrange to queue the 503 ** addressees. 504 */ 505 506 give_up: 507 if (tobuf[0] != '\0') 508 giveresponse(rcode, m, mci, e); 509 for (to = tochain; to != NULL; to = to->q_tchain) 510 { 511 if (rcode != EX_OK) 512 markfailure(e, to, rcode); 513 else 514 { 515 to->q_flags |= QSENT; 516 e->e_nsent++; 517 } 518 } 519 520 /* 521 ** Restore state and return. 522 */ 523 524 errno = 0; 525 define('g', (char *) NULL, e); 526 define('<', (char *) NULL, e); 527 return (rcode); 528 } 529 /* 530 ** MARKFAILURE -- mark a failure on a specific address. 531 ** 532 ** Parameters: 533 ** e -- the envelope we are sending. 534 ** q -- the address to mark. 535 ** rcode -- the code signifying the particular failure. 536 ** 537 ** Returns: 538 ** none. 539 ** 540 ** Side Effects: 541 ** marks the address (and possibly the envelope) with the 542 ** failure so that an error will be returned or 543 ** the message will be queued, as appropriate. 544 */ 545 546 markfailure(e, q, rcode) 547 register ENVELOPE *e; 548 register ADDRESS *q; 549 int rcode; 550 { 551 if (rcode == EX_OK) 552 return; 553 else if (rcode != EX_TEMPFAIL && rcode != EX_IOERR && rcode != EX_OSERR) 554 q->q_flags |= QBADADDR; 555 else if (curtime() > e->e_ctime + TimeOut) 556 { 557 extern char *pintvl(); 558 char buf[MAXLINE]; 559 560 if (!bitset(EF_TIMEOUT, e->e_flags)) 561 { 562 (void) sprintf(buf, "Cannot send message for %s", 563 pintvl(TimeOut, FALSE)); 564 if (e->e_message != NULL) 565 free(e->e_message); 566 e->e_message = newstr(buf); 567 message(buf); 568 } 569 q->q_flags |= QBADADDR; 570 e->e_flags |= EF_TIMEOUT; 571 fprintf(e->e_xfp, "421 %s... Message timed out\n", q->q_paddr); 572 } 573 else 574 q->q_flags |= QQUEUEUP; 575 } 576 /* 577 ** DOFORK -- do a fork, retrying a couple of times on failure. 578 ** 579 ** This MUST be a macro, since after a vfork we are running 580 ** two processes on the same stack!!! 581 ** 582 ** Parameters: 583 ** none. 584 ** 585 ** Returns: 586 ** From a macro??? You've got to be kidding! 587 ** 588 ** Side Effects: 589 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 590 ** pid of child in parent, zero in child. 591 ** -1 on unrecoverable error. 592 ** 593 ** Notes: 594 ** I'm awfully sorry this looks so awful. That's 595 ** vfork for you..... 596 */ 597 598 # define NFORKTRIES 5 599 600 # ifndef FORK 601 # define FORK fork 602 # endif 603 604 # define DOFORK(fORKfN) \ 605 {\ 606 register int i;\ 607 \ 608 for (i = NFORKTRIES; --i >= 0; )\ 609 {\ 610 pid = fORKfN();\ 611 if (pid >= 0)\ 612 break;\ 613 if (i > 0)\ 614 sleep((unsigned) NFORKTRIES - i);\ 615 }\ 616 } 617 /* 618 ** DOFORK -- simple fork interface to DOFORK. 619 ** 620 ** Parameters: 621 ** none. 622 ** 623 ** Returns: 624 ** pid of child in parent. 625 ** zero in child. 626 ** -1 on error. 627 ** 628 ** Side Effects: 629 ** returns twice, once in parent and once in child. 630 */ 631 632 dofork() 633 { 634 register int pid; 635 636 DOFORK(fork); 637 return (pid); 638 } 639 /* 640 ** ENDMAILER -- Wait for mailer to terminate. 641 ** 642 ** We should never get fatal errors (e.g., segmentation 643 ** violation), so we report those specially. For other 644 ** errors, we choose a status message (into statmsg), 645 ** and if it represents an error, we print it. 646 ** 647 ** Parameters: 648 ** pid -- pid of mailer. 649 ** name -- name of mailer (for error messages). 650 ** 651 ** Returns: 652 ** exit code of mailer. 653 ** 654 ** Side Effects: 655 ** none. 656 */ 657 658 endmailer(mci, name) 659 register MCI *mci; 660 char *name; 661 { 662 int st; 663 664 /* close any connections */ 665 if (mci->mci_in != NULL) 666 (void) fclose(mci->mci_in); 667 if (mci->mci_out != NULL) 668 (void) fclose(mci->mci_out); 669 mci->mci_in = mci->mci_out = NULL; 670 mci->mci_state = MCIS_CLOSED; 671 672 /* in the IPC case there is nothing to wait for */ 673 if (mci->mci_pid == 0) 674 return (EX_OK); 675 676 /* wait for the mailer process to die and collect status */ 677 st = waitfor(mci->mci_pid); 678 if (st == -1) 679 { 680 syserr("endmailer %s: wait", name); 681 return (EX_SOFTWARE); 682 } 683 684 /* see if it died a horrid death */ 685 if ((st & 0377) != 0) 686 { 687 syserr("mailer %s died with signal %o", name, st); 688 ExitStat = EX_TEMPFAIL; 689 return (EX_TEMPFAIL); 690 } 691 692 /* normal death -- return status */ 693 st = (st >> 8) & 0377; 694 return (st); 695 } 696 /* 697 ** OPENMAILER -- open connection to mailer. 698 ** 699 ** Parameters: 700 ** m -- mailer descriptor. 701 ** pvp -- parameter vector to pass to mailer. 702 ** ctladdr -- controlling address for user. 703 ** clever -- create a full duplex connection. 704 ** 705 ** Returns: 706 ** The mail connection info struct for this connection. 707 ** NULL on failure. 708 ** 709 ** Side Effects: 710 ** creates a mailer in a subprocess. 711 */ 712 713 MCI * 714 openmailer(m, pvp, ctladdr, clever, e) 715 MAILER *m; 716 char **pvp; 717 ADDRESS *ctladdr; 718 bool clever; 719 ENVELOPE *e; 720 { 721 int pid; 722 register MCI *mci; 723 int mpvect[2]; 724 int rpvect[2]; 725 extern FILE *fdopen(); 726 727 if (tTd(11, 1)) 728 { 729 printf("openmailer:"); 730 printav(pvp); 731 } 732 errno = 0; 733 734 CurHostName = m->m_mailer; 735 736 /* 737 ** Deal with the special case of mail handled through an IPC 738 ** connection. 739 ** In this case we don't actually fork. We must be 740 ** running SMTP for this to work. We will return a 741 ** zero pid to indicate that we are running IPC. 742 ** We also handle a debug version that just talks to stdin/out. 743 */ 744 745 /* check for Local Person Communication -- not for mortals!!! */ 746 if (strcmp(m->m_mailer, "[LPC]") == 0) 747 { 748 mci = (MCI *) xalloc(sizeof *mci); 749 bzero((char *) mci, sizeof *mci); 750 mci->mci_in = stdin; 751 mci->mci_out = stdout; 752 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 753 mci->mci_mailer = m; 754 } 755 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 756 strcmp(m->m_mailer, "[TCP]") == 0) 757 { 758 #ifdef DAEMON 759 register int i; 760 register u_short port; 761 char *curhost; 762 extern MCI *mci_get(); 763 extern char *hostsignature(); 764 765 CurHostName = pvp[1]; 766 curhost = hostsignature(m, pvp[1], e); 767 768 if (curhost == NULL || curhost[0] == '\0') 769 { 770 syserr("null signature"); 771 return NULL; 772 } 773 774 if (!clever) 775 { 776 syserr("554 non-clever IPC"); 777 return NULL; 778 } 779 if (pvp[2] != NULL) 780 port = atoi(pvp[2]); 781 else 782 port = 0; 783 while (*curhost != '\0') 784 { 785 register char *p; 786 char hostbuf[MAXNAME]; 787 788 /* pull the next host from the signature */ 789 p = strchr(curhost, ':'); 790 if (p == NULL) 791 p = &curhost[strlen(curhost)]; 792 strncpy(hostbuf, curhost, p - curhost); 793 hostbuf[p - curhost] = '\0'; 794 if (*p != '\0') 795 p++; 796 curhost = p; 797 798 /* see if we already know that this host is fried */ 799 CurHostName = hostbuf; 800 mci = mci_get(hostbuf, m); 801 if (mci->mci_state != MCIS_CLOSED) 802 { 803 if (tTd(11, 1)) 804 { 805 printf("openmailer: "); 806 mci_dump(mci); 807 } 808 CurHostName = mci->mci_host; 809 return mci; 810 } 811 mci->mci_mailer = m; 812 if (mci->mci_exitstat != EX_OK) 813 continue; 814 815 /* try the connection */ 816 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 817 message("Connecting to %s (%s)...", 818 hostbuf, m->m_name); 819 i = makeconnection(hostbuf, port, mci, 820 bitnset(M_SECURE_PORT, m->m_flags)); 821 mci->mci_exitstat = i; 822 mci->mci_errno = errno; 823 if (i == EX_OK) 824 { 825 mci->mci_state = MCIS_OPENING; 826 mci_cache(mci); 827 break; 828 } 829 else if (tTd(11, 1)) 830 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 831 i, errno); 832 833 834 /* enter status of this host */ 835 setstat(i); 836 } 837 mci->mci_pid = 0; 838 #else /* no DAEMON */ 839 syserr("554 openmailer: no IPC"); 840 if (tTd(11, 1)) 841 printf("openmailer: NULL\n"); 842 return NULL; 843 #endif /* DAEMON */ 844 } 845 else 846 { 847 /* create a pipe to shove the mail through */ 848 if (pipe(mpvect) < 0) 849 { 850 syserr("openmailer: pipe (to mailer)"); 851 if (tTd(11, 1)) 852 printf("openmailer: NULL\n"); 853 return NULL; 854 } 855 856 /* if this mailer speaks smtp, create a return pipe */ 857 if (clever && pipe(rpvect) < 0) 858 { 859 syserr("openmailer: pipe (from mailer)"); 860 (void) close(mpvect[0]); 861 (void) close(mpvect[1]); 862 if (tTd(11, 1)) 863 printf("openmailer: NULL\n"); 864 return NULL; 865 } 866 867 /* 868 ** Actually fork the mailer process. 869 ** DOFORK is clever about retrying. 870 ** 871 ** Dispose of SIGCHLD signal catchers that may be laying 872 ** around so that endmail will get it. 873 */ 874 875 if (e->e_xfp != NULL) 876 (void) fflush(e->e_xfp); /* for debugging */ 877 (void) fflush(stdout); 878 # ifdef SIGCHLD 879 (void) signal(SIGCHLD, SIG_DFL); 880 # endif /* SIGCHLD */ 881 DOFORK(FORK); 882 /* pid is set by DOFORK */ 883 if (pid < 0) 884 { 885 /* failure */ 886 syserr("openmailer: cannot fork"); 887 (void) close(mpvect[0]); 888 (void) close(mpvect[1]); 889 if (clever) 890 { 891 (void) close(rpvect[0]); 892 (void) close(rpvect[1]); 893 } 894 if (tTd(11, 1)) 895 printf("openmailer: NULL\n"); 896 return NULL; 897 } 898 else if (pid == 0) 899 { 900 int i; 901 int saveerrno; 902 char *env[2]; 903 extern int DtableSize; 904 905 /* child -- set up input & exec mailer */ 906 /* make diagnostic output be standard output */ 907 (void) signal(SIGINT, SIG_IGN); 908 (void) signal(SIGHUP, SIG_IGN); 909 (void) signal(SIGTERM, SIG_DFL); 910 911 /* close any other cached connections */ 912 mci_flush(FALSE, mci); 913 914 /* arrange to filter std & diag output of command */ 915 if (clever) 916 { 917 (void) close(rpvect[0]); 918 (void) close(1); 919 (void) dup(rpvect[1]); 920 (void) close(rpvect[1]); 921 } 922 else if (OpMode == MD_SMTP || HoldErrs) 923 { 924 /* put mailer output in transcript */ 925 (void) close(1); 926 (void) dup(fileno(e->e_xfp)); 927 } 928 (void) close(2); 929 (void) dup(1); 930 931 /* arrange to get standard input */ 932 (void) close(mpvect[1]); 933 (void) close(0); 934 if (dup(mpvect[0]) < 0) 935 { 936 syserr("Cannot dup to zero!"); 937 _exit(EX_OSERR); 938 } 939 (void) close(mpvect[0]); 940 if (!bitnset(M_RESTR, m->m_flags)) 941 { 942 if (ctladdr == NULL || ctladdr->q_uid == 0) 943 { 944 (void) setgid(DefGid); 945 (void) initgroups(DefUser, DefGid); 946 (void) setuid(DefUid); 947 } 948 else 949 { 950 (void) setgid(ctladdr->q_gid); 951 (void) initgroups(ctladdr->q_ruser? 952 ctladdr->q_ruser: ctladdr->q_user, 953 ctladdr->q_gid); 954 (void) setuid(ctladdr->q_uid); 955 } 956 } 957 958 /* arrange for all the files to be closed */ 959 for (i = 3; i < DtableSize; i++) 960 { 961 register int j; 962 if ((j = fcntl(i, F_GETFD, 0)) != -1) 963 (void)fcntl(i, F_SETFD, j|1); 964 } 965 966 /* try to execute the mailer */ 967 env[0] = "AGENT=sendmail"; 968 env[1] = NULL; 969 execve(m->m_mailer, pvp, env); 970 saveerrno = errno; 971 syserr("Cannot exec %s", m->m_mailer); 972 if (m == LocalMailer) 973 _exit(EX_TEMPFAIL); 974 if (transienterror(saveerrno)) 975 _exit(EX_TEMPFAIL); 976 _exit(EX_UNAVAILABLE); 977 } 978 979 /* 980 ** Set up return value. 981 */ 982 983 mci = (MCI *) xalloc(sizeof *mci); 984 bzero((char *) mci, sizeof *mci); 985 mci->mci_mailer = m; 986 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 987 mci->mci_pid = pid; 988 (void) close(mpvect[0]); 989 mci->mci_out = fdopen(mpvect[1], "w"); 990 if (clever) 991 { 992 (void) close(rpvect[1]); 993 mci->mci_in = fdopen(rpvect[0], "r"); 994 } 995 else 996 { 997 mci->mci_flags |= MCIF_TEMP; 998 mci->mci_in = NULL; 999 } 1000 } 1001 1002 /* 1003 ** If we are in SMTP opening state, send initial protocol. 1004 */ 1005 1006 if (clever && mci->mci_state != MCIS_CLOSED) 1007 { 1008 smtpinit(m, mci, e); 1009 } 1010 if (tTd(11, 1)) 1011 { 1012 printf("openmailer: "); 1013 mci_dump(mci); 1014 } 1015 1016 return mci; 1017 } 1018 /* 1019 ** GIVERESPONSE -- Interpret an error response from a mailer 1020 ** 1021 ** Parameters: 1022 ** stat -- the status code from the mailer (high byte 1023 ** only; core dumps must have been taken care of 1024 ** already). 1025 ** m -- the mailer info for this mailer. 1026 ** mci -- the mailer connection info -- can be NULL if the 1027 ** response is given before the connection is made. 1028 ** e -- the current envelope. 1029 ** 1030 ** Returns: 1031 ** none. 1032 ** 1033 ** Side Effects: 1034 ** Errors may be incremented. 1035 ** ExitStat may be set. 1036 */ 1037 1038 giveresponse(stat, m, mci, e) 1039 int stat; 1040 register MAILER *m; 1041 register MCI *mci; 1042 ENVELOPE *e; 1043 { 1044 register char *statmsg; 1045 extern char *SysExMsg[]; 1046 register int i; 1047 extern int N_SysEx; 1048 #ifdef NAMED_BIND 1049 extern int h_errno; 1050 #endif 1051 char buf[MAXLINE]; 1052 1053 /* 1054 ** Compute status message from code. 1055 */ 1056 1057 i = stat - EX__BASE; 1058 if (stat == 0) 1059 statmsg = "250 Sent"; 1060 else if (i < 0 || i > N_SysEx) 1061 { 1062 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1063 stat = EX_UNAVAILABLE; 1064 statmsg = buf; 1065 } 1066 else if (stat == EX_TEMPFAIL) 1067 { 1068 (void) strcpy(buf, SysExMsg[i]); 1069 #ifdef NAMED_BIND 1070 if (h_errno == TRY_AGAIN) 1071 { 1072 extern char *errstring(); 1073 1074 statmsg = errstring(h_errno+MAX_ERRNO); 1075 } 1076 else 1077 #endif 1078 { 1079 if (errno != 0) 1080 { 1081 extern char *errstring(); 1082 1083 statmsg = errstring(errno); 1084 } 1085 else 1086 { 1087 #ifdef SMTP 1088 extern char SmtpError[]; 1089 1090 statmsg = SmtpError; 1091 #else /* SMTP */ 1092 statmsg = NULL; 1093 #endif /* SMTP */ 1094 } 1095 } 1096 if (statmsg != NULL && statmsg[0] != '\0') 1097 { 1098 (void) strcat(buf, ": "); 1099 (void) strcat(buf, statmsg); 1100 } 1101 statmsg = buf; 1102 } 1103 else 1104 { 1105 statmsg = SysExMsg[i]; 1106 } 1107 1108 /* 1109 ** Print the message as appropriate 1110 */ 1111 1112 if (stat == EX_OK || stat == EX_TEMPFAIL) 1113 message(&statmsg[4], errstring(errno)); 1114 else 1115 { 1116 Errors++; 1117 usrerr(statmsg, errstring(errno)); 1118 } 1119 1120 /* 1121 ** Final cleanup. 1122 ** Log a record of the transaction. Compute the new 1123 ** ExitStat -- if we already had an error, stick with 1124 ** that. 1125 */ 1126 1127 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1128 logdelivery(m, mci, &statmsg[4], e); 1129 1130 if (stat != EX_TEMPFAIL) 1131 setstat(stat); 1132 if (stat != EX_OK) 1133 { 1134 if (e->e_message != NULL) 1135 free(e->e_message); 1136 e->e_message = newstr(&statmsg[4]); 1137 } 1138 errno = 0; 1139 #ifdef NAMED_BIND 1140 h_errno = 0; 1141 #endif 1142 } 1143 /* 1144 ** LOGDELIVERY -- log the delivery in the system log 1145 ** 1146 ** Parameters: 1147 ** m -- the mailer info. Can be NULL for initial queue. 1148 ** mci -- the mailer connection info -- can be NULL if the 1149 ** log is occuring when no connection is active. 1150 ** stat -- the message to print for the status. 1151 ** e -- the current envelope. 1152 ** 1153 ** Returns: 1154 ** none 1155 ** 1156 ** Side Effects: 1157 ** none 1158 */ 1159 1160 logdelivery(m, mci, stat, e) 1161 MAILER *m; 1162 register MCI *mci; 1163 char *stat; 1164 register ENVELOPE *e; 1165 { 1166 # ifdef LOG 1167 char *curhost; 1168 char buf[512]; 1169 extern char *pintvl(); 1170 extern char *macvalue(); 1171 1172 (void) sprintf(buf, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1173 1174 if (m != NULL) 1175 { 1176 (void) strcat(buf, ", mailer="); 1177 (void) strcat(buf, m->m_name); 1178 } 1179 1180 if (mci != NULL && mci->mci_host != NULL) 1181 { 1182 # ifdef DAEMON 1183 extern struct sockaddr_in CurHostAddr; 1184 extern char *inet_ntoa(); 1185 # endif 1186 1187 (void) strcat(buf, ", relay="); 1188 (void) strcat(buf, mci->mci_host); 1189 1190 # ifdef DAEMON 1191 (void) strcat(buf, " ("); 1192 (void) strcat(buf, inet_ntoa(CurHostAddr.sin_addr)); 1193 (void) strcat(buf, ")"); 1194 # endif 1195 } 1196 else 1197 { 1198 char *p = macvalue('h', e); 1199 1200 if (p != NULL && p[0] != '\0') 1201 { 1202 (void) strcat(buf, ", relay="); 1203 (void) strcat(buf, p); 1204 } 1205 } 1206 1207 syslog(LOG_INFO, "%s: to=%s, %s, stat=%s", 1208 e->e_id, e->e_to, buf, stat); 1209 # endif /* LOG */ 1210 } 1211 /* 1212 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1213 ** 1214 ** This can be made an arbitrary message separator by changing $l 1215 ** 1216 ** One of the ugliest hacks seen by human eyes is contained herein: 1217 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1218 ** does a well-meaning programmer such as myself have to deal with 1219 ** this kind of antique garbage???? 1220 ** 1221 ** Parameters: 1222 ** fp -- the file to output to. 1223 ** m -- the mailer describing this entry. 1224 ** 1225 ** Returns: 1226 ** none 1227 ** 1228 ** Side Effects: 1229 ** outputs some text to fp. 1230 */ 1231 1232 putfromline(fp, m, e) 1233 register FILE *fp; 1234 register MAILER *m; 1235 ENVELOPE *e; 1236 { 1237 char *template = "\201l\n"; 1238 char buf[MAXLINE]; 1239 1240 if (bitnset(M_NHDR, m->m_flags)) 1241 return; 1242 1243 # ifdef UGLYUUCP 1244 if (bitnset(M_UGLYUUCP, m->m_flags)) 1245 { 1246 char *bang; 1247 char xbuf[MAXLINE]; 1248 1249 expand("\201<", buf, &buf[sizeof buf - 1], e); 1250 bang = strchr(buf, '!'); 1251 if (bang == NULL) 1252 syserr("554 No ! in UUCP! (%s)", buf); 1253 else 1254 { 1255 *bang++ = '\0'; 1256 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1257 template = xbuf; 1258 } 1259 } 1260 # endif /* UGLYUUCP */ 1261 expand(template, buf, &buf[sizeof buf - 1], e); 1262 putline(buf, fp, m); 1263 } 1264 /* 1265 ** PUTBODY -- put the body of a message. 1266 ** 1267 ** Parameters: 1268 ** fp -- file to output onto. 1269 ** m -- a mailer descriptor to control output format. 1270 ** e -- the envelope to put out. 1271 ** 1272 ** Returns: 1273 ** none. 1274 ** 1275 ** Side Effects: 1276 ** The message is written onto fp. 1277 */ 1278 1279 putbody(fp, m, e) 1280 FILE *fp; 1281 MAILER *m; 1282 register ENVELOPE *e; 1283 { 1284 char buf[MAXLINE]; 1285 1286 /* 1287 ** Output the body of the message 1288 */ 1289 1290 if (e->e_dfp == NULL) 1291 { 1292 if (e->e_df != NULL) 1293 { 1294 e->e_dfp = fopen(e->e_df, "r"); 1295 if (e->e_dfp == NULL) 1296 syserr("putbody: Cannot open %s for %s from %s", 1297 e->e_df, e->e_to, e->e_from); 1298 } 1299 else 1300 putline("<<< No Message Collected >>>", fp, m); 1301 } 1302 if (e->e_dfp != NULL) 1303 { 1304 rewind(e->e_dfp); 1305 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1306 { 1307 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1308 strncmp(buf, "From ", 5) == 0) 1309 (void) putc('>', fp); 1310 putline(buf, fp, m); 1311 } 1312 1313 if (ferror(e->e_dfp)) 1314 { 1315 syserr("putbody: read error"); 1316 ExitStat = EX_IOERR; 1317 } 1318 } 1319 1320 (void) fflush(fp); 1321 if (ferror(fp) && errno != EPIPE) 1322 { 1323 syserr("putbody: write error"); 1324 ExitStat = EX_IOERR; 1325 } 1326 errno = 0; 1327 } 1328 /* 1329 ** PARENTBODY -- put the body of the parent of a message. 1330 ** 1331 ** Parameters: 1332 ** fp -- file to output onto. 1333 ** m -- a mailer descriptor to control output format. 1334 ** e -- the envelope whose parent to put out. 1335 ** 1336 ** Returns: 1337 ** none. 1338 ** 1339 ** Side Effects: 1340 ** The message is written onto fp. 1341 */ 1342 1343 parentbody(fp, m, e) 1344 FILE *fp; 1345 MAILER *m; 1346 register ENVELOPE *e; 1347 { 1348 putbody(fp, m, e->e_parent); 1349 } 1350 /* 1351 ** MAILFILE -- Send a message to a file. 1352 ** 1353 ** If the file has the setuid/setgid bits set, but NO execute 1354 ** bits, sendmail will try to become the owner of that file 1355 ** rather than the real user. Obviously, this only works if 1356 ** sendmail runs as root. 1357 ** 1358 ** This could be done as a subordinate mailer, except that it 1359 ** is used implicitly to save messages in ~/dead.letter. We 1360 ** view this as being sufficiently important as to include it 1361 ** here. For example, if the system is dying, we shouldn't have 1362 ** to create another process plus some pipes to save the message. 1363 ** 1364 ** Parameters: 1365 ** filename -- the name of the file to send to. 1366 ** ctladdr -- the controlling address header -- includes 1367 ** the userid/groupid to be when sending. 1368 ** 1369 ** Returns: 1370 ** The exit code associated with the operation. 1371 ** 1372 ** Side Effects: 1373 ** none. 1374 */ 1375 1376 mailfile(filename, ctladdr, e) 1377 char *filename; 1378 ADDRESS *ctladdr; 1379 register ENVELOPE *e; 1380 { 1381 register FILE *f; 1382 register int pid; 1383 int mode; 1384 1385 /* 1386 ** Fork so we can change permissions here. 1387 ** Note that we MUST use fork, not vfork, because of 1388 ** the complications of calling subroutines, etc. 1389 */ 1390 1391 DOFORK(fork); 1392 1393 if (pid < 0) 1394 return (EX_OSERR); 1395 else if (pid == 0) 1396 { 1397 /* child -- actually write to file */ 1398 struct stat stb; 1399 1400 (void) signal(SIGINT, SIG_DFL); 1401 (void) signal(SIGHUP, SIG_DFL); 1402 (void) signal(SIGTERM, SIG_DFL); 1403 (void) umask(OldUmask); 1404 1405 if (stat(filename, &stb) < 0) 1406 stb.st_mode = 0666; 1407 mode = stb.st_mode; 1408 1409 /* limit the errors to those actually caused in the child */ 1410 errno = 0; 1411 ExitStat = EX_OK; 1412 1413 if (bitset(0111, stb.st_mode)) 1414 exit(EX_CANTCREAT); 1415 if (ctladdr == NULL) 1416 ctladdr = &e->e_from; 1417 else 1418 { 1419 /* ignore setuid and setgid bits */ 1420 mode &= ~(S_ISGID|S_ISUID); 1421 } 1422 1423 /* we have to open the dfile BEFORE setuid */ 1424 if (e->e_dfp == NULL && e->e_df != NULL) 1425 { 1426 e->e_dfp = fopen(e->e_df, "r"); 1427 if (e->e_dfp == NULL) 1428 { 1429 syserr("mailfile: Cannot open %s for %s from %s", 1430 e->e_df, e->e_to, e->e_from); 1431 } 1432 } 1433 1434 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1435 { 1436 if (ctladdr->q_uid == 0) 1437 { 1438 (void) setgid(DefGid); 1439 (void) initgroups(DefUser, DefGid); 1440 } 1441 else 1442 { 1443 (void) setgid(ctladdr->q_gid); 1444 (void) initgroups(ctladdr->q_ruser ? 1445 ctladdr->q_ruser : ctladdr->q_user, 1446 ctladdr->q_gid); 1447 } 1448 } 1449 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1450 { 1451 if (ctladdr->q_uid == 0) 1452 (void) setuid(DefUid); 1453 else 1454 (void) setuid(ctladdr->q_uid); 1455 } 1456 FileName = filename; 1457 LineNumber = 0; 1458 f = dfopen(filename, "a"); 1459 if (f == NULL) 1460 { 1461 message("554 cannot open"); 1462 exit(EX_CANTCREAT); 1463 } 1464 1465 putfromline(f, ProgMailer, e); 1466 (*e->e_puthdr)(f, ProgMailer, e); 1467 putline("\n", f, ProgMailer); 1468 (*e->e_putbody)(f, ProgMailer, e); 1469 putline("\n", f, ProgMailer); 1470 if (ferror(f)) 1471 { 1472 message("451 I/O error"); 1473 setstat(EX_IOERR); 1474 } 1475 (void) fclose(f); 1476 (void) fflush(stdout); 1477 1478 /* reset ISUID & ISGID bits for paranoid systems */ 1479 (void) chmod(filename, (int) stb.st_mode); 1480 exit(ExitStat); 1481 /*NOTREACHED*/ 1482 } 1483 else 1484 { 1485 /* parent -- wait for exit status */ 1486 int st; 1487 1488 st = waitfor(pid); 1489 if ((st & 0377) != 0) 1490 return (EX_UNAVAILABLE); 1491 else 1492 return ((st >> 8) & 0377); 1493 /*NOTREACHED*/ 1494 } 1495 } 1496 /* 1497 ** SENDALL -- actually send all the messages. 1498 ** 1499 ** Parameters: 1500 ** e -- the envelope to send. 1501 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1502 ** the current SendMode. 1503 ** 1504 ** Returns: 1505 ** none. 1506 ** 1507 ** Side Effects: 1508 ** Scans the send lists and sends everything it finds. 1509 ** Delivers any appropriate error messages. 1510 ** If we are running in a non-interactive mode, takes the 1511 ** appropriate action. 1512 */ 1513 1514 sendall(e, mode) 1515 ENVELOPE *e; 1516 char mode; 1517 { 1518 register ADDRESS *q; 1519 bool oldverbose; 1520 int pid; 1521 char *owner; 1522 int otherowners; 1523 ENVELOPE *splitenv = NULL; 1524 # ifdef LOCKF 1525 struct flock lfd; 1526 # endif 1527 1528 /* determine actual delivery mode */ 1529 if (mode == SM_DEFAULT) 1530 { 1531 extern bool shouldqueue(); 1532 1533 mode = SendMode; 1534 if (mode != SM_VERIFY && 1535 shouldqueue(e->e_msgpriority, e->e_ctime)) 1536 mode = SM_QUEUE; 1537 } 1538 1539 if (tTd(13, 1)) 1540 { 1541 printf("\nSENDALL: mode %c, sendqueue:\n", mode); 1542 printaddr(e->e_sendqueue, TRUE); 1543 } 1544 1545 /* 1546 ** Do any preprocessing necessary for the mode we are running. 1547 ** Check to make sure the hop count is reasonable. 1548 ** Delete sends to the sender in mailing lists. 1549 */ 1550 1551 CurEnv = e; 1552 1553 if (e->e_hopcount > MaxHopCount) 1554 { 1555 errno = 0; 1556 syserr("554 too many hops %d (%d max): from %s, to %s", 1557 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 1558 e->e_sendqueue->q_paddr); 1559 return; 1560 } 1561 1562 if (!MeToo) 1563 { 1564 extern ADDRESS *recipient(); 1565 1566 e->e_from.q_flags |= QDONTSEND; 1567 if (tTd(13, 5)) 1568 { 1569 printf("sendall: QDONTSEND "); 1570 printaddr(&e->e_from, FALSE); 1571 } 1572 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1573 } 1574 1575 /* 1576 ** Handle alias owners. 1577 ** 1578 ** We scan up the q_alias chain looking for owners. 1579 ** We discard owners that are the same as the return path. 1580 */ 1581 1582 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1583 { 1584 register struct address *a; 1585 1586 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 1587 continue; 1588 if (a != NULL) 1589 q->q_owner = a->q_owner; 1590 1591 if (q->q_owner != NULL && !bitset(QDONTSEND, q->q_flags) && 1592 strcmp(q->q_owner, e->e_returnpath) == 0) 1593 q->q_owner = NULL; 1594 } 1595 1596 owner = ""; 1597 otherowners = 1; 1598 while (owner != NULL && otherowners > 0) 1599 { 1600 owner = NULL; 1601 otherowners = 0; 1602 1603 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1604 { 1605 if (bitset(QDONTSEND, q->q_flags)) 1606 continue; 1607 1608 if (q->q_owner != NULL) 1609 { 1610 if (owner == NULL) 1611 owner = q->q_owner; 1612 else if (owner != q->q_owner) 1613 { 1614 if (strcmp(owner, q->q_owner) == 0) 1615 { 1616 /* make future comparisons cheap */ 1617 q->q_owner = owner; 1618 } 1619 else 1620 { 1621 otherowners++; 1622 } 1623 owner = q->q_owner; 1624 } 1625 } 1626 else 1627 { 1628 otherowners++; 1629 } 1630 } 1631 1632 if (owner != NULL && otherowners > 0) 1633 { 1634 register ENVELOPE *ee; 1635 extern HDR *copyheader(); 1636 extern ADDRESS *copyqueue(); 1637 1638 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 1639 STRUCTCOPY(*e, *ee); 1640 ee->e_id = NULL; 1641 ee->e_parent = e; 1642 ee->e_header = copyheader(e->e_header); 1643 ee->e_sendqueue = copyqueue(e->e_sendqueue); 1644 ee->e_errorqueue = copyqueue(e->e_errorqueue); 1645 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE); 1646 ee->e_returnpath = owner; 1647 ee->e_putbody = parentbody; 1648 ee->e_sibling = splitenv; 1649 splitenv = ee; 1650 1651 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1652 if (q->q_owner == owner) 1653 q->q_flags |= QDONTSEND; 1654 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 1655 if (q->q_owner != owner) 1656 q->q_flags |= QDONTSEND; 1657 1658 if (e->e_df != NULL && mode != SM_VERIFY) 1659 { 1660 ee->e_dfp = NULL; 1661 ee->e_df = newstr(queuename(ee, 'd')); 1662 if (link(e->e_df, ee->e_df) < 0) 1663 { 1664 syserr("sendall: link(%s, %s)", 1665 e->e_df, ee->e_df); 1666 } 1667 } 1668 } 1669 } 1670 1671 if (owner != NULL) 1672 e->e_returnpath = owner; 1673 1674 # ifdef QUEUE 1675 if ((mode == SM_QUEUE || mode == SM_FORK || 1676 (mode != SM_VERIFY && SuperSafe)) && 1677 !bitset(EF_INQUEUE, e->e_flags)) 1678 queueup(e, TRUE, mode == SM_QUEUE); 1679 #endif /* QUEUE */ 1680 1681 if (splitenv != NULL) 1682 { 1683 if (tTd(13, 1)) 1684 { 1685 printf("\nsendall: Split queue; remaining queue:\n"); 1686 printaddr(e->e_sendqueue, TRUE); 1687 } 1688 1689 while (splitenv != NULL) 1690 { 1691 sendall(splitenv, mode); 1692 splitenv = splitenv->e_sibling; 1693 } 1694 1695 CurEnv = e; 1696 } 1697 1698 oldverbose = Verbose; 1699 switch (mode) 1700 { 1701 case SM_VERIFY: 1702 Verbose = TRUE; 1703 break; 1704 1705 case SM_QUEUE: 1706 queueonly: 1707 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1708 return; 1709 1710 case SM_FORK: 1711 if (e->e_xfp != NULL) 1712 (void) fflush(e->e_xfp); 1713 1714 # ifdef LOCKF 1715 /* 1716 ** Since lockf has the interesting semantic that the 1717 ** lock is lost when we fork, we have to risk losing 1718 ** the lock here by closing before the fork, and then 1719 ** trying to get it back in the child. 1720 */ 1721 1722 if (e->e_lockfp != NULL) 1723 { 1724 (void) fclose(e->e_lockfp); 1725 e->e_lockfp = NULL; 1726 } 1727 # endif /* LOCKF */ 1728 1729 pid = fork(); 1730 if (pid < 0) 1731 { 1732 goto queueonly; 1733 } 1734 else if (pid > 0) 1735 { 1736 /* be sure we leave the temp files to our child */ 1737 e->e_id = e->e_df = NULL; 1738 # ifndef LOCKF 1739 if (e->e_lockfp != NULL) 1740 { 1741 (void) fclose(e->e_lockfp); 1742 e->e_lockfp = NULL; 1743 } 1744 # endif 1745 1746 /* close any random open files in the envelope */ 1747 if (e->e_dfp != NULL) 1748 { 1749 (void) fclose(e->e_dfp); 1750 e->e_dfp = NULL; 1751 } 1752 if (e->e_xfp != NULL) 1753 { 1754 (void) fclose(e->e_xfp); 1755 e->e_xfp = NULL; 1756 } 1757 return; 1758 } 1759 1760 /* double fork to avoid zombies */ 1761 if (fork() > 0) 1762 exit(EX_OK); 1763 1764 /* be sure we are immune from the terminal */ 1765 disconnect(FALSE); 1766 1767 # ifdef LOCKF 1768 /* 1769 ** Now try to get our lock back. 1770 */ 1771 1772 lfd.l_type = F_WRLCK; 1773 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1774 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1775 if (e->e_lockfp == NULL || 1776 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1777 { 1778 /* oops.... lost it */ 1779 # ifdef LOG 1780 if (LogLevel > 29) 1781 syslog(LOG_NOTICE, "%s: lost lock: %m", 1782 e->e_id); 1783 # endif /* LOG */ 1784 exit(EX_OK); 1785 } 1786 # endif /* LOCKF */ 1787 1788 /* 1789 ** Close any cached connections. 1790 ** 1791 ** We don't send the QUIT protocol because the parent 1792 ** still knows about the connection. 1793 ** 1794 ** This should only happen when delivering an error 1795 ** message. 1796 */ 1797 1798 mci_flush(FALSE, NULL); 1799 1800 break; 1801 } 1802 1803 /* 1804 ** Run through the list and send everything. 1805 */ 1806 1807 e->e_nsent = 0; 1808 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1809 { 1810 if (mode == SM_VERIFY) 1811 { 1812 e->e_to = q->q_paddr; 1813 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1814 message("deliverable"); 1815 } 1816 else if (!bitset(QDONTSEND, q->q_flags)) 1817 { 1818 # ifdef QUEUE 1819 /* 1820 ** Checkpoint the send list every few addresses 1821 */ 1822 1823 if (e->e_nsent >= CheckpointInterval) 1824 { 1825 queueup(e, TRUE, FALSE); 1826 e->e_nsent = 0; 1827 } 1828 # endif /* QUEUE */ 1829 (void) deliver(e, q); 1830 } 1831 } 1832 Verbose = oldverbose; 1833 1834 /* 1835 ** Now run through and check for errors. 1836 */ 1837 1838 if (mode == SM_VERIFY) 1839 return; 1840 1841 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1842 { 1843 if (tTd(13, 3)) 1844 { 1845 printf("Checking "); 1846 printaddr(q, FALSE); 1847 } 1848 1849 /* only send errors if the message failed */ 1850 if (!bitset(QBADADDR, q->q_flags)) 1851 continue; 1852 1853 if (q->q_owner == NULL && strcmp(e->e_from.q_paddr, "<>") != 0) 1854 (void) sendtolist(e->e_from.q_paddr, NULL, 1855 &e->e_errorqueue, e); 1856 } 1857 1858 if (mode == SM_FORK) 1859 finis(); 1860 } 1861 /* 1862 ** HOSTSIGNATURE -- return the "signature" for a host. 1863 ** 1864 ** The signature describes how we are going to send this -- it 1865 ** can be just the hostname (for non-Internet hosts) or can be 1866 ** an ordered list of MX hosts. 1867 ** 1868 ** Parameters: 1869 ** m -- the mailer describing this host. 1870 ** host -- the host name. 1871 ** e -- the current envelope. 1872 ** 1873 ** Returns: 1874 ** The signature for this host. 1875 ** 1876 ** Side Effects: 1877 ** Can tweak the symbol table. 1878 */ 1879 1880 char * 1881 hostsignature(m, host, e) 1882 register MAILER *m; 1883 char *host; 1884 ENVELOPE *e; 1885 { 1886 register char *p; 1887 register STAB *s; 1888 int i; 1889 int len; 1890 #ifdef NAMED_BIND 1891 int nmx; 1892 auto int rcode; 1893 char *mxhosts[MAXMXHOSTS + 1]; 1894 static char myhostbuf[MAXNAME]; 1895 #endif 1896 1897 /* 1898 ** Check to see if this uses IPC -- if not, it can't have MX records. 1899 */ 1900 1901 p = m->m_mailer; 1902 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1903 { 1904 /* just an ordinary mailer */ 1905 return host; 1906 } 1907 1908 /* 1909 ** If it is a numeric address, just return it. 1910 */ 1911 1912 if (host[0] == '[') 1913 return host; 1914 1915 /* 1916 ** Look it up in the symbol table. 1917 */ 1918 1919 s = stab(host, ST_HOSTSIG, ST_ENTER); 1920 if (s->s_hostsig != NULL) 1921 return s->s_hostsig; 1922 1923 /* 1924 ** Not already there -- create a signature. 1925 */ 1926 1927 #ifdef NAMED_BIND 1928 if (myhostbuf[0] == '\0') 1929 expand("\201j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1930 1931 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1932 if (nmx <= 0) 1933 { 1934 register MCI *mci; 1935 extern int errno; 1936 extern MCI *mci_get(); 1937 1938 /* update the connection info for this host */ 1939 mci = mci_get(host, m); 1940 mci->mci_exitstat = rcode; 1941 mci->mci_errno = errno; 1942 1943 /* and return the original host name as the signature */ 1944 s->s_hostsig = host; 1945 return host; 1946 } 1947 1948 len = 0; 1949 for (i = 0; i < nmx; i++) 1950 { 1951 len += strlen(mxhosts[i]) + 1; 1952 } 1953 s->s_hostsig = p = xalloc(len); 1954 for (i = 0; i < nmx; i++) 1955 { 1956 if (i != 0) 1957 *p++ = ':'; 1958 strcpy(p, mxhosts[i]); 1959 p += strlen(p); 1960 } 1961 makelower(s->s_hostsig); 1962 #else 1963 /* not using BIND -- the signature is just the host name */ 1964 s->s_hostsig = host; 1965 #endif 1966 if (tTd(17, 1)) 1967 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1968 return s->s_hostsig; 1969 } 1970