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 6.33 (Berkeley) 03/01/93"; 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 $x expansion is 125 ** NOT done on the mailer name. Then, if the mailer has 126 ** a picky -f flag, we insert it as appropriate. This 127 ** code does not check for 'pv' overflow; this places a 128 ** manifest lower limit of 4 for MAXPV. 129 ** The from address rewrite is expected to make 130 ** the address relative to the other end. 131 */ 132 133 /* rewrite from address, using rewriting rules */ 134 (void) strcpy(rpathbuf, remotename(e->e_returnpath, m, TRUE, FALSE, 135 TRUE, e)); 136 if (e->e_returnpath == e->e_sender) 137 { 138 from = rpathbuf; 139 } 140 else 141 { 142 (void) strcpy(tfrombuf, remotename(e->e_sender, m, TRUE, FALSE, 143 TRUE, e)); 144 from = tfrombuf; 145 } 146 147 define('f', e->e_returnpath, e); /* raw return path */ 148 define('<', rpathbuf, e); /* translated return path */ 149 define('g', from, e); /* translated sender */ 150 define('h', host, e); /* to host */ 151 Errors = 0; 152 pvp = pv; 153 *pvp++ = m->m_argv[0]; 154 155 /* insert -f or -r flag as appropriate */ 156 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 157 { 158 if (bitnset(M_FOPT, m->m_flags)) 159 *pvp++ = "-f"; 160 else 161 *pvp++ = "-r"; 162 *pvp++ = newstr(rpathbuf); 163 } 164 165 /* 166 ** Append the other fixed parts of the argv. These run 167 ** up to the first entry containing "$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 (!clever) 769 syserr("554 non-clever IPC"); 770 if (pvp[2] != NULL) 771 port = atoi(pvp[2]); 772 else 773 port = 0; 774 while (*curhost != '\0') 775 { 776 register char *p; 777 char hostbuf[MAXNAME]; 778 779 /* pull the next host from the signature */ 780 p = strchr(curhost, ':'); 781 if (p == NULL) 782 p = &curhost[strlen(curhost)]; 783 strncpy(hostbuf, curhost, p - curhost); 784 hostbuf[p - curhost] = '\0'; 785 if (*p != '\0') 786 p++; 787 curhost = p; 788 789 /* see if we already know that this host is fried */ 790 CurHostName = hostbuf; 791 mci = mci_get(hostbuf, m); 792 if (mci->mci_state != MCIS_CLOSED) 793 { 794 if (tTd(11, 1)) 795 { 796 printf("openmailer: "); 797 mci_dump(mci); 798 } 799 CurHostName = mci->mci_host; 800 return mci; 801 } 802 mci->mci_mailer = m; 803 if (mci->mci_exitstat != EX_OK) 804 continue; 805 806 /* try the connection */ 807 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 808 message("Connecting to %s (%s)...", 809 hostbuf, m->m_name); 810 i = makeconnection(hostbuf, port, mci, 811 bitnset(M_SECURE_PORT, m->m_flags)); 812 mci->mci_exitstat = i; 813 mci->mci_errno = errno; 814 if (i == EX_OK) 815 { 816 mci->mci_state = MCIS_OPENING; 817 mci_cache(mci); 818 break; 819 } 820 else if (tTd(11, 1)) 821 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 822 i, errno); 823 824 825 /* enter status of this host */ 826 setstat(i); 827 } 828 mci->mci_pid = 0; 829 #else /* no DAEMON */ 830 syserr("554 openmailer: no IPC"); 831 if (tTd(11, 1)) 832 printf("openmailer: NULL\n"); 833 return NULL; 834 #endif /* DAEMON */ 835 } 836 else 837 { 838 /* create a pipe to shove the mail through */ 839 if (pipe(mpvect) < 0) 840 { 841 syserr("openmailer: pipe (to mailer)"); 842 if (tTd(11, 1)) 843 printf("openmailer: NULL\n"); 844 return NULL; 845 } 846 847 /* if this mailer speaks smtp, create a return pipe */ 848 if (clever && pipe(rpvect) < 0) 849 { 850 syserr("openmailer: pipe (from mailer)"); 851 (void) close(mpvect[0]); 852 (void) close(mpvect[1]); 853 if (tTd(11, 1)) 854 printf("openmailer: NULL\n"); 855 return NULL; 856 } 857 858 /* 859 ** Actually fork the mailer process. 860 ** DOFORK is clever about retrying. 861 ** 862 ** Dispose of SIGCHLD signal catchers that may be laying 863 ** around so that endmail will get it. 864 */ 865 866 if (e->e_xfp != NULL) 867 (void) fflush(e->e_xfp); /* for debugging */ 868 (void) fflush(stdout); 869 # ifdef SIGCHLD 870 (void) signal(SIGCHLD, SIG_DFL); 871 # endif /* SIGCHLD */ 872 DOFORK(FORK); 873 /* pid is set by DOFORK */ 874 if (pid < 0) 875 { 876 /* failure */ 877 syserr("openmailer: cannot fork"); 878 (void) close(mpvect[0]); 879 (void) close(mpvect[1]); 880 if (clever) 881 { 882 (void) close(rpvect[0]); 883 (void) close(rpvect[1]); 884 } 885 if (tTd(11, 1)) 886 printf("openmailer: NULL\n"); 887 return NULL; 888 } 889 else if (pid == 0) 890 { 891 int i; 892 int saveerrno; 893 char *env[2]; 894 extern int DtableSize; 895 896 /* child -- set up input & exec mailer */ 897 /* make diagnostic output be standard output */ 898 (void) signal(SIGINT, SIG_IGN); 899 (void) signal(SIGHUP, SIG_IGN); 900 (void) signal(SIGTERM, SIG_DFL); 901 902 /* close any other cached connections */ 903 mci_flush(FALSE, mci); 904 905 /* arrange to filter std & diag output of command */ 906 if (clever) 907 { 908 (void) close(rpvect[0]); 909 (void) close(1); 910 (void) dup(rpvect[1]); 911 (void) close(rpvect[1]); 912 } 913 else if (OpMode == MD_SMTP || HoldErrs) 914 { 915 /* put mailer output in transcript */ 916 (void) close(1); 917 (void) dup(fileno(e->e_xfp)); 918 } 919 (void) close(2); 920 (void) dup(1); 921 922 /* arrange to get standard input */ 923 (void) close(mpvect[1]); 924 (void) close(0); 925 if (dup(mpvect[0]) < 0) 926 { 927 syserr("Cannot dup to zero!"); 928 _exit(EX_OSERR); 929 } 930 (void) close(mpvect[0]); 931 if (!bitnset(M_RESTR, m->m_flags)) 932 { 933 if (ctladdr == NULL || ctladdr->q_uid == 0) 934 { 935 (void) setgid(DefGid); 936 (void) initgroups(DefUser, DefGid); 937 (void) setuid(DefUid); 938 } 939 else 940 { 941 (void) setgid(ctladdr->q_gid); 942 (void) initgroups(ctladdr->q_ruser? 943 ctladdr->q_ruser: ctladdr->q_user, 944 ctladdr->q_gid); 945 (void) setuid(ctladdr->q_uid); 946 } 947 } 948 949 /* arrange for all the files to be closed */ 950 for (i = 3; i < DtableSize; i++) 951 { 952 register int j; 953 if ((j = fcntl(i, F_GETFD, 0)) != -1) 954 (void)fcntl(i, F_SETFD, j|1); 955 } 956 957 /* try to execute the mailer */ 958 env[0] = "AGENT=sendmail"; 959 env[1] = NULL; 960 execve(m->m_mailer, pvp, env); 961 saveerrno = errno; 962 syserr("Cannot exec %s", m->m_mailer); 963 if (m == LocalMailer) 964 _exit(EX_TEMPFAIL); 965 switch (saveerrno) 966 { 967 case EIO: 968 case EAGAIN: 969 case ENOMEM: 970 # ifdef EPROCLIM 971 case EPROCLIM: 972 # endif 973 # ifdef ETIMEDOUT 974 case ETIMEDOUT: 975 # endif 976 _exit(EX_TEMPFAIL); 977 } 978 _exit(EX_UNAVAILABLE); 979 } 980 981 /* 982 ** Set up return value. 983 */ 984 985 mci = (MCI *) xalloc(sizeof *mci); 986 bzero((char *) mci, sizeof *mci); 987 mci->mci_mailer = m; 988 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 989 mci->mci_pid = pid; 990 (void) close(mpvect[0]); 991 mci->mci_out = fdopen(mpvect[1], "w"); 992 if (clever) 993 { 994 (void) close(rpvect[1]); 995 mci->mci_in = fdopen(rpvect[0], "r"); 996 } 997 else 998 { 999 mci->mci_flags |= MCIF_TEMP; 1000 mci->mci_in = NULL; 1001 } 1002 } 1003 1004 /* 1005 ** If we are in SMTP opening state, send initial protocol. 1006 */ 1007 1008 if (clever && mci->mci_state != MCIS_CLOSED) 1009 { 1010 smtpinit(m, mci, e); 1011 } 1012 if (tTd(11, 1)) 1013 { 1014 printf("openmailer: "); 1015 mci_dump(mci); 1016 } 1017 1018 return mci; 1019 } 1020 /* 1021 ** GIVERESPONSE -- Interpret an error response from a mailer 1022 ** 1023 ** Parameters: 1024 ** stat -- the status code from the mailer (high byte 1025 ** only; core dumps must have been taken care of 1026 ** already). 1027 ** m -- the mailer info for this mailer. 1028 ** mci -- the mailer connection info -- can be NULL if the 1029 ** response is given before the connection is made. 1030 ** e -- the current envelope. 1031 ** 1032 ** Returns: 1033 ** none. 1034 ** 1035 ** Side Effects: 1036 ** Errors may be incremented. 1037 ** ExitStat may be set. 1038 */ 1039 1040 giveresponse(stat, m, mci, e) 1041 int stat; 1042 register MAILER *m; 1043 register MCI *mci; 1044 ENVELOPE *e; 1045 { 1046 register char *statmsg; 1047 extern char *SysExMsg[]; 1048 register int i; 1049 extern int N_SysEx; 1050 #ifdef NAMED_BIND 1051 extern int h_errno; 1052 #endif 1053 char buf[MAXLINE]; 1054 1055 /* 1056 ** Compute status message from code. 1057 */ 1058 1059 i = stat - EX__BASE; 1060 if (stat == 0) 1061 statmsg = "250 Sent"; 1062 else if (i < 0 || i > N_SysEx) 1063 { 1064 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1065 stat = EX_UNAVAILABLE; 1066 statmsg = buf; 1067 } 1068 else if (stat == EX_TEMPFAIL) 1069 { 1070 (void) strcpy(buf, SysExMsg[i]); 1071 #ifdef NAMED_BIND 1072 if (h_errno == TRY_AGAIN) 1073 { 1074 extern char *errstring(); 1075 1076 statmsg = errstring(h_errno+MAX_ERRNO); 1077 } 1078 else 1079 #endif 1080 { 1081 if (errno != 0) 1082 { 1083 extern char *errstring(); 1084 1085 statmsg = errstring(errno); 1086 } 1087 else 1088 { 1089 #ifdef SMTP 1090 extern char SmtpError[]; 1091 1092 statmsg = SmtpError; 1093 #else /* SMTP */ 1094 statmsg = NULL; 1095 #endif /* SMTP */ 1096 } 1097 } 1098 if (statmsg != NULL && statmsg[0] != '\0') 1099 { 1100 (void) strcat(buf, ": "); 1101 (void) strcat(buf, statmsg); 1102 } 1103 statmsg = buf; 1104 } 1105 else 1106 { 1107 statmsg = SysExMsg[i]; 1108 } 1109 1110 /* 1111 ** Print the message as appropriate 1112 */ 1113 1114 if (stat == EX_OK || stat == EX_TEMPFAIL) 1115 message(&statmsg[4]); 1116 else 1117 { 1118 Errors++; 1119 usrerr(statmsg); 1120 } 1121 1122 /* 1123 ** Final cleanup. 1124 ** Log a record of the transaction. Compute the new 1125 ** ExitStat -- if we already had an error, stick with 1126 ** that. 1127 */ 1128 1129 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1130 logdelivery(m, mci, &statmsg[4], e); 1131 1132 if (stat != EX_TEMPFAIL) 1133 setstat(stat); 1134 if (stat != EX_OK) 1135 { 1136 if (e->e_message != NULL) 1137 free(e->e_message); 1138 e->e_message = newstr(&statmsg[4]); 1139 } 1140 errno = 0; 1141 #ifdef NAMED_BIND 1142 h_errno = 0; 1143 #endif 1144 } 1145 /* 1146 ** LOGDELIVERY -- log the delivery in the system log 1147 ** 1148 ** Parameters: 1149 ** m -- the mailer info. Can be NULL for initial queue. 1150 ** mci -- the mailer connection info -- can be NULL if the 1151 ** log is occuring when no connection is active. 1152 ** stat -- the message to print for the status. 1153 ** e -- the current envelope. 1154 ** 1155 ** Returns: 1156 ** none 1157 ** 1158 ** Side Effects: 1159 ** none 1160 */ 1161 1162 logdelivery(m, mci, stat, e) 1163 MAILER *m; 1164 register MCI *mci; 1165 char *stat; 1166 register ENVELOPE *e; 1167 { 1168 char *delay; 1169 char *curhost; 1170 extern char *pintvl(); 1171 1172 # ifdef LOG 1173 if (mci != NULL && mci->mci_host != NULL) 1174 curhost = mci->mci_host; 1175 else 1176 curhost = CurHostName; 1177 1178 delay = pintvl(curtime() - e->e_ctime, TRUE); 1179 if (strcmp(stat, "Sent") != 0 || m == NULL || curhost == NULL || 1180 strcmp(curhost, "localhost") == 0) 1181 { 1182 syslog(LOG_INFO, "%s: to=%s, delay=%s, stat=%s", 1183 e->e_id, e->e_to, delay, stat); 1184 } 1185 else 1186 { 1187 char *p1, *p2; 1188 extern char *macvalue(); 1189 1190 if (curhost[0] == '/') 1191 { 1192 p1 = macvalue('h', e); 1193 if (p1 == NULL || p1[0] == '\0') 1194 p1 = "local"; 1195 p2 = curhost; 1196 } 1197 # ifdef DAEMON 1198 else 1199 { 1200 extern struct sockaddr_in CurHostAddr; 1201 extern char *inet_ntoa(); 1202 1203 p1 = curhost; 1204 p2 = inet_ntoa(CurHostAddr.sin_addr); 1205 } 1206 # endif 1207 syslog(LOG_INFO, "%s: to=%s, delay=%s, mailer=%s, stat=Sent to %s (%s)", 1208 e->e_id, e->e_to, delay, m->m_name, p1, p2); 1209 } 1210 # endif /* LOG */ 1211 } 1212 /* 1213 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1214 ** 1215 ** This can be made an arbitrary message separator by changing $l 1216 ** 1217 ** One of the ugliest hacks seen by human eyes is contained herein: 1218 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1219 ** does a well-meaning programmer such as myself have to deal with 1220 ** this kind of antique garbage???? 1221 ** 1222 ** Parameters: 1223 ** fp -- the file to output to. 1224 ** m -- the mailer describing this entry. 1225 ** 1226 ** Returns: 1227 ** none 1228 ** 1229 ** Side Effects: 1230 ** outputs some text to fp. 1231 */ 1232 1233 putfromline(fp, m, e) 1234 register FILE *fp; 1235 register MAILER *m; 1236 ENVELOPE *e; 1237 { 1238 char *template = "\201l\n"; 1239 char buf[MAXLINE]; 1240 1241 if (bitnset(M_NHDR, m->m_flags)) 1242 return; 1243 1244 # ifdef UGLYUUCP 1245 if (bitnset(M_UGLYUUCP, m->m_flags)) 1246 { 1247 char *bang; 1248 char xbuf[MAXLINE]; 1249 1250 expand("\201<", buf, &buf[sizeof buf - 1], e); 1251 bang = strchr(buf, '!'); 1252 if (bang == NULL) 1253 syserr("554 No ! in UUCP! (%s)", buf); 1254 else 1255 { 1256 *bang++ = '\0'; 1257 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1258 template = xbuf; 1259 } 1260 } 1261 # endif /* UGLYUUCP */ 1262 expand(template, buf, &buf[sizeof buf - 1], e); 1263 putline(buf, fp, m); 1264 } 1265 /* 1266 ** PUTBODY -- put the body of a message. 1267 ** 1268 ** Parameters: 1269 ** fp -- file to output onto. 1270 ** m -- a mailer descriptor to control output format. 1271 ** e -- the envelope to put out. 1272 ** 1273 ** Returns: 1274 ** none. 1275 ** 1276 ** Side Effects: 1277 ** The message is written onto fp. 1278 */ 1279 1280 putbody(fp, m, e) 1281 FILE *fp; 1282 MAILER *m; 1283 register ENVELOPE *e; 1284 { 1285 char buf[MAXLINE]; 1286 1287 /* 1288 ** Output the body of the message 1289 */ 1290 1291 if (e->e_dfp == NULL) 1292 { 1293 if (e->e_df != NULL) 1294 { 1295 e->e_dfp = fopen(e->e_df, "r"); 1296 if (e->e_dfp == NULL) 1297 syserr("putbody: Cannot open %s for %s from %s", 1298 e->e_df, e->e_to, e->e_from); 1299 } 1300 else 1301 putline("<<< No Message Collected >>>", fp, m); 1302 } 1303 if (e->e_dfp != NULL) 1304 { 1305 rewind(e->e_dfp); 1306 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1307 { 1308 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1309 strncmp(buf, "From ", 5) == 0) 1310 (void) putc('>', fp); 1311 putline(buf, fp, m); 1312 } 1313 1314 if (ferror(e->e_dfp)) 1315 { 1316 syserr("putbody: read error"); 1317 ExitStat = EX_IOERR; 1318 } 1319 } 1320 1321 (void) fflush(fp); 1322 if (ferror(fp) && errno != EPIPE) 1323 { 1324 syserr("putbody: write error"); 1325 ExitStat = EX_IOERR; 1326 } 1327 errno = 0; 1328 } 1329 /* 1330 ** PARENTBODY -- put the body of the parent of a message. 1331 ** 1332 ** Parameters: 1333 ** fp -- file to output onto. 1334 ** m -- a mailer descriptor to control output format. 1335 ** e -- the envelope whose parent to put out. 1336 ** 1337 ** Returns: 1338 ** none. 1339 ** 1340 ** Side Effects: 1341 ** The message is written onto fp. 1342 */ 1343 1344 parentbody(fp, m, e) 1345 FILE *fp; 1346 MAILER *m; 1347 register ENVELOPE *e; 1348 { 1349 putbody(fp, m, e->e_parent); 1350 } 1351 /* 1352 ** MAILFILE -- Send a message to a file. 1353 ** 1354 ** If the file has the setuid/setgid bits set, but NO execute 1355 ** bits, sendmail will try to become the owner of that file 1356 ** rather than the real user. Obviously, this only works if 1357 ** sendmail runs as root. 1358 ** 1359 ** This could be done as a subordinate mailer, except that it 1360 ** is used implicitly to save messages in ~/dead.letter. We 1361 ** view this as being sufficiently important as to include it 1362 ** here. For example, if the system is dying, we shouldn't have 1363 ** to create another process plus some pipes to save the message. 1364 ** 1365 ** Parameters: 1366 ** filename -- the name of the file to send to. 1367 ** ctladdr -- the controlling address header -- includes 1368 ** the userid/groupid to be when sending. 1369 ** 1370 ** Returns: 1371 ** The exit code associated with the operation. 1372 ** 1373 ** Side Effects: 1374 ** none. 1375 */ 1376 1377 mailfile(filename, ctladdr, e) 1378 char *filename; 1379 ADDRESS *ctladdr; 1380 register ENVELOPE *e; 1381 { 1382 register FILE *f; 1383 register int pid; 1384 int mode; 1385 1386 /* 1387 ** Fork so we can change permissions here. 1388 ** Note that we MUST use fork, not vfork, because of 1389 ** the complications of calling subroutines, etc. 1390 */ 1391 1392 DOFORK(fork); 1393 1394 if (pid < 0) 1395 return (EX_OSERR); 1396 else if (pid == 0) 1397 { 1398 /* child -- actually write to file */ 1399 struct stat stb; 1400 1401 (void) signal(SIGINT, SIG_DFL); 1402 (void) signal(SIGHUP, SIG_DFL); 1403 (void) signal(SIGTERM, SIG_DFL); 1404 (void) umask(OldUmask); 1405 1406 if (stat(filename, &stb) < 0) 1407 stb.st_mode = 0666; 1408 mode = stb.st_mode; 1409 1410 /* limit the errors to those actually caused in the child */ 1411 errno = 0; 1412 ExitStat = EX_OK; 1413 1414 if (bitset(0111, stb.st_mode)) 1415 exit(EX_CANTCREAT); 1416 if (ctladdr == NULL) 1417 ctladdr = &e->e_from; 1418 else 1419 { 1420 /* ignore setuid and setgid bits */ 1421 mode &= ~(S_ISGID|S_ISUID); 1422 } 1423 1424 /* we have to open the dfile BEFORE setuid */ 1425 if (e->e_dfp == NULL && e->e_df != NULL) 1426 { 1427 e->e_dfp = fopen(e->e_df, "r"); 1428 if (e->e_dfp == NULL) 1429 { 1430 syserr("mailfile: Cannot open %s for %s from %s", 1431 e->e_df, e->e_to, e->e_from); 1432 } 1433 } 1434 1435 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1436 { 1437 if (ctladdr->q_uid == 0) 1438 { 1439 (void) setgid(DefGid); 1440 (void) initgroups(DefUser, DefGid); 1441 } 1442 else 1443 { 1444 (void) setgid(ctladdr->q_gid); 1445 (void) initgroups(ctladdr->q_ruser ? 1446 ctladdr->q_ruser : ctladdr->q_user, 1447 ctladdr->q_gid); 1448 } 1449 } 1450 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1451 { 1452 if (ctladdr->q_uid == 0) 1453 (void) setuid(DefUid); 1454 else 1455 (void) setuid(ctladdr->q_uid); 1456 } 1457 FileName = filename; 1458 LineNumber = 0; 1459 f = dfopen(filename, "a"); 1460 if (f == NULL) 1461 { 1462 message("554 cannot open"); 1463 exit(EX_CANTCREAT); 1464 } 1465 1466 putfromline(f, ProgMailer, e); 1467 (*e->e_puthdr)(f, ProgMailer, e); 1468 putline("\n", f, ProgMailer); 1469 (*e->e_putbody)(f, ProgMailer, e); 1470 putline("\n", f, ProgMailer); 1471 if (ferror(f)) 1472 { 1473 message("451 I/O error"); 1474 setstat(EX_IOERR); 1475 } 1476 (void) fclose(f); 1477 (void) fflush(stdout); 1478 1479 /* reset ISUID & ISGID bits for paranoid systems */ 1480 (void) chmod(filename, (int) stb.st_mode); 1481 exit(ExitStat); 1482 /*NOTREACHED*/ 1483 } 1484 else 1485 { 1486 /* parent -- wait for exit status */ 1487 int st; 1488 1489 st = waitfor(pid); 1490 if ((st & 0377) != 0) 1491 return (EX_UNAVAILABLE); 1492 else 1493 return ((st >> 8) & 0377); 1494 /*NOTREACHED*/ 1495 } 1496 } 1497 /* 1498 ** SENDALL -- actually send all the messages. 1499 ** 1500 ** Parameters: 1501 ** e -- the envelope to send. 1502 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1503 ** the current SendMode. 1504 ** 1505 ** Returns: 1506 ** none. 1507 ** 1508 ** Side Effects: 1509 ** Scans the send lists and sends everything it finds. 1510 ** Delivers any appropriate error messages. 1511 ** If we are running in a non-interactive mode, takes the 1512 ** appropriate action. 1513 */ 1514 1515 sendall(e, mode) 1516 ENVELOPE *e; 1517 char mode; 1518 { 1519 register ADDRESS *q; 1520 bool oldverbose; 1521 int pid; 1522 char *owner; 1523 int otherowners; 1524 ENVELOPE *splitenv = NULL; 1525 # ifdef LOCKF 1526 struct flock lfd; 1527 # endif 1528 1529 /* determine actual delivery mode */ 1530 if (mode == SM_DEFAULT) 1531 { 1532 extern bool shouldqueue(); 1533 1534 mode = SendMode; 1535 if (mode != SM_VERIFY && 1536 shouldqueue(e->e_msgpriority, e->e_ctime)) 1537 mode = SM_QUEUE; 1538 } 1539 1540 if (tTd(13, 1)) 1541 { 1542 printf("\nSENDALL: mode %c, sendqueue:\n", mode); 1543 printaddr(e->e_sendqueue, TRUE); 1544 } 1545 1546 /* 1547 ** Do any preprocessing necessary for the mode we are running. 1548 ** Check to make sure the hop count is reasonable. 1549 ** Delete sends to the sender in mailing lists. 1550 */ 1551 1552 CurEnv = e; 1553 1554 if (e->e_hopcount > MaxHopCount) 1555 { 1556 errno = 0; 1557 syserr("554 too many hops %d (%d max): from %s, to %s", 1558 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 1559 e->e_sendqueue->q_paddr); 1560 return; 1561 } 1562 1563 if (!MeToo) 1564 { 1565 extern ADDRESS *recipient(); 1566 1567 e->e_from.q_flags |= QDONTSEND; 1568 if (tTd(13, 5)) 1569 { 1570 printf("sendall: QDONTSEND "); 1571 printaddr(&e->e_from, FALSE); 1572 } 1573 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1574 } 1575 1576 /* 1577 ** Handle alias owners. 1578 ** 1579 ** We scan up the q_alias chain looking for owners. 1580 ** We discard owners that are the same as the return path. 1581 */ 1582 1583 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1584 { 1585 register struct address *a; 1586 1587 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 1588 continue; 1589 if (a != NULL) 1590 q->q_owner = a->q_owner; 1591 1592 if (q->q_owner != NULL && !bitset(QDONTSEND, q->q_flags) && 1593 strcmp(q->q_owner, e->e_returnpath) == 0) 1594 q->q_owner = NULL; 1595 } 1596 1597 owner = ""; 1598 otherowners = 1; 1599 while (owner != NULL && otherowners > 0) 1600 { 1601 owner = NULL; 1602 otherowners = 0; 1603 1604 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1605 { 1606 if (bitset(QDONTSEND, q->q_flags)) 1607 continue; 1608 1609 if (q->q_owner != NULL) 1610 { 1611 if (owner == NULL) 1612 owner = q->q_owner; 1613 else if (owner != q->q_owner) 1614 { 1615 if (strcmp(owner, q->q_owner) == 0) 1616 { 1617 /* make future comparisons cheap */ 1618 q->q_owner = owner; 1619 } 1620 else 1621 { 1622 otherowners++; 1623 } 1624 owner = q->q_owner; 1625 } 1626 } 1627 else 1628 { 1629 otherowners++; 1630 } 1631 } 1632 1633 if (owner != NULL && otherowners > 0) 1634 { 1635 register ENVELOPE *ee; 1636 extern HDR *copyheader(); 1637 extern ADDRESS *copyqueue(); 1638 1639 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 1640 STRUCTCOPY(*e, *ee); 1641 ee->e_id = NULL; 1642 ee->e_parent = e; 1643 ee->e_header = copyheader(e->e_header); 1644 ee->e_sendqueue = copyqueue(e->e_sendqueue); 1645 ee->e_errorqueue = copyqueue(e->e_errorqueue); 1646 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE); 1647 ee->e_returnpath = owner; 1648 ee->e_putbody = parentbody; 1649 ee->e_sibling = splitenv; 1650 splitenv = ee; 1651 1652 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1653 if (q->q_owner == owner) 1654 q->q_flags |= QDONTSEND; 1655 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 1656 if (q->q_owner != owner) 1657 q->q_flags |= QDONTSEND; 1658 1659 if (e->e_df != NULL && mode != SM_VERIFY) 1660 { 1661 ee->e_dfp = NULL; 1662 ee->e_df = newstr(queuename(ee, 'd')); 1663 if (link(e->e_df, ee->e_df) < 0) 1664 { 1665 syserr("sendall: link(%s, %s)", 1666 e->e_df, ee->e_df); 1667 } 1668 } 1669 } 1670 } 1671 1672 if (owner != NULL) 1673 e->e_returnpath = owner; 1674 1675 # ifdef QUEUE 1676 if ((mode == SM_QUEUE || mode == SM_FORK || 1677 (mode != SM_VERIFY && SuperSafe)) && 1678 !bitset(EF_INQUEUE, e->e_flags)) 1679 queueup(e, TRUE, mode == SM_QUEUE); 1680 #endif /* QUEUE */ 1681 1682 if (splitenv != NULL) 1683 { 1684 if (tTd(13, 1)) 1685 { 1686 printf("\nsendall: Split queue; remaining queue:\n"); 1687 printaddr(e->e_sendqueue, TRUE); 1688 } 1689 1690 while (splitenv != NULL) 1691 { 1692 sendall(splitenv, mode); 1693 splitenv = splitenv->e_sibling; 1694 } 1695 1696 CurEnv = e; 1697 } 1698 1699 oldverbose = Verbose; 1700 switch (mode) 1701 { 1702 case SM_VERIFY: 1703 Verbose = TRUE; 1704 break; 1705 1706 case SM_QUEUE: 1707 queueonly: 1708 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1709 return; 1710 1711 case SM_FORK: 1712 if (e->e_xfp != NULL) 1713 (void) fflush(e->e_xfp); 1714 1715 # ifdef LOCKF 1716 /* 1717 ** Since lockf has the interesting semantic that the 1718 ** lock is lost when we fork, we have to risk losing 1719 ** the lock here by closing before the fork, and then 1720 ** trying to get it back in the child. 1721 */ 1722 1723 if (e->e_lockfp != NULL) 1724 { 1725 (void) fclose(e->e_lockfp); 1726 e->e_lockfp = NULL; 1727 } 1728 # endif /* LOCKF */ 1729 1730 pid = fork(); 1731 if (pid < 0) 1732 { 1733 goto queueonly; 1734 } 1735 else if (pid > 0) 1736 { 1737 /* be sure we leave the temp files to our child */ 1738 e->e_id = e->e_df = NULL; 1739 # ifndef LOCKF 1740 if (e->e_lockfp != NULL) 1741 { 1742 (void) fclose(e->e_lockfp); 1743 e->e_lockfp = NULL; 1744 } 1745 # endif 1746 1747 /* close any random open files in the envelope */ 1748 if (e->e_dfp != NULL) 1749 { 1750 (void) fclose(e->e_dfp); 1751 e->e_dfp = NULL; 1752 } 1753 if (e->e_xfp != NULL) 1754 { 1755 (void) fclose(e->e_xfp); 1756 e->e_xfp = NULL; 1757 } 1758 return; 1759 } 1760 1761 /* double fork to avoid zombies */ 1762 if (fork() > 0) 1763 exit(EX_OK); 1764 1765 /* be sure we are immune from the terminal */ 1766 disconnect(FALSE); 1767 1768 # ifdef LOCKF 1769 /* 1770 ** Now try to get our lock back. 1771 */ 1772 1773 lfd.l_type = F_WRLCK; 1774 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1775 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1776 if (e->e_lockfp == NULL || 1777 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1778 { 1779 /* oops.... lost it */ 1780 # ifdef LOG 1781 if (LogLevel > 29) 1782 syslog(LOG_NOTICE, "%s: lost lock: %m", 1783 e->e_id); 1784 # endif /* LOG */ 1785 exit(EX_OK); 1786 } 1787 # endif /* LOCKF */ 1788 1789 /* 1790 ** Close any cached connections. 1791 ** 1792 ** We don't send the QUIT protocol because the parent 1793 ** still knows about the connection. 1794 ** 1795 ** This should only happen when delivering an error 1796 ** message. 1797 */ 1798 1799 mci_flush(FALSE, NULL); 1800 1801 break; 1802 } 1803 1804 /* 1805 ** Run through the list and send everything. 1806 */ 1807 1808 e->e_nsent = 0; 1809 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1810 { 1811 if (mode == SM_VERIFY) 1812 { 1813 e->e_to = q->q_paddr; 1814 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1815 message("deliverable"); 1816 } 1817 else if (!bitset(QDONTSEND, q->q_flags)) 1818 { 1819 # ifdef QUEUE 1820 /* 1821 ** Checkpoint the send list every few addresses 1822 */ 1823 1824 if (e->e_nsent >= CheckpointInterval) 1825 { 1826 queueup(e, TRUE, FALSE); 1827 e->e_nsent = 0; 1828 } 1829 # endif /* QUEUE */ 1830 (void) deliver(e, q); 1831 } 1832 } 1833 Verbose = oldverbose; 1834 1835 /* 1836 ** Now run through and check for errors. 1837 */ 1838 1839 if (mode == SM_VERIFY) 1840 return; 1841 1842 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1843 { 1844 if (tTd(13, 3)) 1845 { 1846 printf("Checking "); 1847 printaddr(q, FALSE); 1848 } 1849 1850 /* only send errors if the message failed */ 1851 if (!bitset(QBADADDR, q->q_flags)) 1852 continue; 1853 1854 if (q->q_owner == NULL && strcmp(e->e_from.q_paddr, "<>") != 0) 1855 (void) sendtolist(e->e_from.q_paddr, NULL, 1856 &e->e_errorqueue, e); 1857 } 1858 1859 if (mode == SM_FORK) 1860 finis(); 1861 } 1862 /* 1863 ** HOSTSIGNATURE -- return the "signature" for a host. 1864 ** 1865 ** The signature describes how we are going to send this -- it 1866 ** can be just the hostname (for non-Internet hosts) or can be 1867 ** an ordered list of MX hosts. 1868 ** 1869 ** Parameters: 1870 ** m -- the mailer describing this host. 1871 ** host -- the host name. 1872 ** e -- the current envelope. 1873 ** 1874 ** Returns: 1875 ** The signature for this host. 1876 ** 1877 ** Side Effects: 1878 ** Can tweak the symbol table. 1879 */ 1880 1881 char * 1882 hostsignature(m, host, e) 1883 register MAILER *m; 1884 char *host; 1885 ENVELOPE *e; 1886 { 1887 register char *p; 1888 register STAB *s; 1889 int i; 1890 int len; 1891 #ifdef NAMED_BIND 1892 int nmx; 1893 auto int rcode; 1894 char *mxhosts[MAXMXHOSTS + 1]; 1895 static char myhostbuf[MAXNAME]; 1896 #endif 1897 1898 /* 1899 ** Check to see if this uses IPC -- if not, it can't have MX records. 1900 */ 1901 1902 p = m->m_mailer; 1903 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1904 { 1905 /* just an ordinary mailer */ 1906 return host; 1907 } 1908 1909 /* 1910 ** If it is a numeric address, just return it. 1911 */ 1912 1913 if (host[0] == '[') 1914 return host; 1915 1916 /* 1917 ** Look it up in the symbol table. 1918 */ 1919 1920 s = stab(host, ST_HOSTSIG, ST_ENTER); 1921 if (s->s_hostsig != NULL) 1922 return s->s_hostsig; 1923 1924 /* 1925 ** Not already there -- create a signature. 1926 */ 1927 1928 #ifdef NAMED_BIND 1929 if (myhostbuf[0] == '\0') 1930 expand("\201j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1931 1932 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1933 if (nmx <= 0) 1934 { 1935 register MCI *mci; 1936 extern int errno; 1937 extern MCI *mci_get(); 1938 1939 /* update the connection info for this host */ 1940 mci = mci_get(host, m); 1941 mci->mci_exitstat = rcode; 1942 mci->mci_errno = errno; 1943 1944 /* and return the original host name as the signature */ 1945 s->s_hostsig = host; 1946 return host; 1947 } 1948 1949 len = 0; 1950 for (i = 0; i < nmx; i++) 1951 { 1952 len += strlen(mxhosts[i]) + 1; 1953 } 1954 s->s_hostsig = p = xalloc(len); 1955 for (i = 0; i < nmx; i++) 1956 { 1957 if (i != 0) 1958 *p++ = ':'; 1959 strcpy(p, mxhosts[i]); 1960 p += strlen(p); 1961 } 1962 makelower(s->s_hostsig); 1963 #else 1964 /* not using BIND -- the signature is just the host name */ 1965 s->s_hostsig = host; 1966 #endif 1967 if (tTd(17, 1)) 1968 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1969 return s->s_hostsig; 1970 } 1971