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 6.31 (Berkeley) 02/28/93"; 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("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, e); 272 continue; 273 } 274 rcode = checkcompat(to, e); 275 if (rcode != EX_OK) 276 { 277 giveresponse(rcode, m, 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, 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) 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, 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, 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 descriptor for this mailer. 1028 ** 1029 ** Returns: 1030 ** none. 1031 ** 1032 ** Side Effects: 1033 ** Errors may be incremented. 1034 ** ExitStat may be set. 1035 */ 1036 1037 giveresponse(stat, m, e) 1038 int stat; 1039 register MAILER *m; 1040 ENVELOPE *e; 1041 { 1042 register char *statmsg; 1043 extern char *SysExMsg[]; 1044 register int i; 1045 extern int N_SysEx; 1046 #ifdef NAMED_BIND 1047 extern int h_errno; 1048 #endif 1049 char buf[MAXLINE]; 1050 1051 #ifdef lint 1052 if (m == NULL) 1053 return; 1054 #endif lint 1055 1056 /* 1057 ** Compute status message from code. 1058 */ 1059 1060 i = stat - EX__BASE; 1061 if (stat == 0) 1062 statmsg = "250 Sent"; 1063 else if (i < 0 || i > N_SysEx) 1064 { 1065 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1066 stat = EX_UNAVAILABLE; 1067 statmsg = buf; 1068 } 1069 else if (stat == EX_TEMPFAIL) 1070 { 1071 (void) strcpy(buf, SysExMsg[i]); 1072 #ifdef NAMED_BIND 1073 if (h_errno == TRY_AGAIN) 1074 { 1075 extern char *errstring(); 1076 1077 statmsg = errstring(h_errno+MAX_ERRNO); 1078 } 1079 else 1080 #endif 1081 { 1082 if (errno != 0) 1083 { 1084 extern char *errstring(); 1085 1086 statmsg = errstring(errno); 1087 } 1088 else 1089 { 1090 #ifdef SMTP 1091 extern char SmtpError[]; 1092 1093 statmsg = SmtpError; 1094 #else /* SMTP */ 1095 statmsg = NULL; 1096 #endif /* SMTP */ 1097 } 1098 } 1099 if (statmsg != NULL && statmsg[0] != '\0') 1100 { 1101 (void) strcat(buf, ": "); 1102 (void) strcat(buf, statmsg); 1103 } 1104 statmsg = buf; 1105 } 1106 else 1107 { 1108 statmsg = SysExMsg[i]; 1109 } 1110 1111 /* 1112 ** Print the message as appropriate 1113 */ 1114 1115 if (stat == EX_OK || stat == EX_TEMPFAIL) 1116 message(&statmsg[4]); 1117 else 1118 { 1119 Errors++; 1120 usrerr(statmsg); 1121 } 1122 1123 /* 1124 ** Final cleanup. 1125 ** Log a record of the transaction. Compute the new 1126 ** ExitStat -- if we already had an error, stick with 1127 ** that. 1128 */ 1129 1130 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1131 logdelivery(&statmsg[4], e); 1132 1133 if (stat != EX_TEMPFAIL) 1134 setstat(stat); 1135 if (stat != EX_OK) 1136 { 1137 if (e->e_message != NULL) 1138 free(e->e_message); 1139 e->e_message = newstr(&statmsg[4]); 1140 } 1141 errno = 0; 1142 #ifdef NAMED_BIND 1143 h_errno = 0; 1144 #endif 1145 } 1146 /* 1147 ** LOGDELIVERY -- log the delivery in the system log 1148 ** 1149 ** Parameters: 1150 ** stat -- the message to print for the status 1151 ** 1152 ** Returns: 1153 ** none 1154 ** 1155 ** Side Effects: 1156 ** none 1157 */ 1158 1159 logdelivery(stat, e) 1160 char *stat; 1161 register ENVELOPE *e; 1162 { 1163 char *delay; 1164 extern char *pintvl(); 1165 1166 # ifdef LOG 1167 delay = pintvl(curtime() - e->e_ctime, TRUE); 1168 if (strcmp(stat, "Sent") != 0 || CurHostName == NULL || 1169 strcmp(CurHostName, "localhost") == 0) 1170 { 1171 syslog(LOG_INFO, "%s: to=%s, delay=%s, stat=%s", 1172 e->e_id, e->e_to, delay, stat); 1173 } 1174 else 1175 { 1176 char *p1, *p2; 1177 extern char *macvalue(); 1178 1179 if (CurHostName[0] == '/') 1180 { 1181 p1 = macvalue('h', e); 1182 if (p1 == NULL || p1[0] == '\0') 1183 p1 = "local"; 1184 p2 = CurHostName; 1185 } 1186 # ifdef DAEMON 1187 else 1188 { 1189 extern struct sockaddr_in CurHostAddr; 1190 extern char *inet_ntoa(); 1191 1192 p1 = CurHostName; 1193 p2 = inet_ntoa(CurHostAddr.sin_addr); 1194 } 1195 # endif 1196 syslog(LOG_INFO, "%s: to=%s, delay=%s, stat=Sent to %s (%s)", 1197 e->e_id, e->e_to, delay, p1, p2); 1198 } 1199 # endif /* LOG */ 1200 } 1201 /* 1202 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1203 ** 1204 ** This can be made an arbitrary message separator by changing $l 1205 ** 1206 ** One of the ugliest hacks seen by human eyes is contained herein: 1207 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1208 ** does a well-meaning programmer such as myself have to deal with 1209 ** this kind of antique garbage???? 1210 ** 1211 ** Parameters: 1212 ** fp -- the file to output to. 1213 ** m -- the mailer describing this entry. 1214 ** 1215 ** Returns: 1216 ** none 1217 ** 1218 ** Side Effects: 1219 ** outputs some text to fp. 1220 */ 1221 1222 putfromline(fp, m, e) 1223 register FILE *fp; 1224 register MAILER *m; 1225 ENVELOPE *e; 1226 { 1227 char *template = "\201l\n"; 1228 char buf[MAXLINE]; 1229 1230 if (bitnset(M_NHDR, m->m_flags)) 1231 return; 1232 1233 # ifdef UGLYUUCP 1234 if (bitnset(M_UGLYUUCP, m->m_flags)) 1235 { 1236 char *bang; 1237 char xbuf[MAXLINE]; 1238 1239 expand("\201<", buf, &buf[sizeof buf - 1], e); 1240 bang = strchr(buf, '!'); 1241 if (bang == NULL) 1242 syserr("554 No ! in UUCP! (%s)", buf); 1243 else 1244 { 1245 *bang++ = '\0'; 1246 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1247 template = xbuf; 1248 } 1249 } 1250 # endif /* UGLYUUCP */ 1251 expand(template, buf, &buf[sizeof buf - 1], e); 1252 putline(buf, fp, m); 1253 } 1254 /* 1255 ** PUTBODY -- put the body of a message. 1256 ** 1257 ** Parameters: 1258 ** fp -- file to output onto. 1259 ** m -- a mailer descriptor to control output format. 1260 ** e -- the envelope to put out. 1261 ** 1262 ** Returns: 1263 ** none. 1264 ** 1265 ** Side Effects: 1266 ** The message is written onto fp. 1267 */ 1268 1269 putbody(fp, m, e) 1270 FILE *fp; 1271 MAILER *m; 1272 register ENVELOPE *e; 1273 { 1274 char buf[MAXLINE]; 1275 1276 /* 1277 ** Output the body of the message 1278 */ 1279 1280 if (e->e_dfp == NULL) 1281 { 1282 if (e->e_df != NULL) 1283 { 1284 e->e_dfp = fopen(e->e_df, "r"); 1285 if (e->e_dfp == NULL) 1286 syserr("putbody: Cannot open %s for %s from %s", 1287 e->e_df, e->e_to, e->e_from); 1288 } 1289 else 1290 putline("<<< No Message Collected >>>", fp, m); 1291 } 1292 if (e->e_dfp != NULL) 1293 { 1294 rewind(e->e_dfp); 1295 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1296 { 1297 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1298 strncmp(buf, "From ", 5) == 0) 1299 (void) putc('>', fp); 1300 putline(buf, fp, m); 1301 } 1302 1303 if (ferror(e->e_dfp)) 1304 { 1305 syserr("putbody: read error"); 1306 ExitStat = EX_IOERR; 1307 } 1308 } 1309 1310 (void) fflush(fp); 1311 if (ferror(fp) && errno != EPIPE) 1312 { 1313 syserr("putbody: write error"); 1314 ExitStat = EX_IOERR; 1315 } 1316 errno = 0; 1317 } 1318 /* 1319 ** PARENTBODY -- put the body of the parent of a message. 1320 ** 1321 ** Parameters: 1322 ** fp -- file to output onto. 1323 ** m -- a mailer descriptor to control output format. 1324 ** e -- the envelope whose parent to put out. 1325 ** 1326 ** Returns: 1327 ** none. 1328 ** 1329 ** Side Effects: 1330 ** The message is written onto fp. 1331 */ 1332 1333 parentbody(fp, m, e) 1334 FILE *fp; 1335 MAILER *m; 1336 register ENVELOPE *e; 1337 { 1338 putbody(fp, m, e->e_parent); 1339 } 1340 /* 1341 ** MAILFILE -- Send a message to a file. 1342 ** 1343 ** If the file has the setuid/setgid bits set, but NO execute 1344 ** bits, sendmail will try to become the owner of that file 1345 ** rather than the real user. Obviously, this only works if 1346 ** sendmail runs as root. 1347 ** 1348 ** This could be done as a subordinate mailer, except that it 1349 ** is used implicitly to save messages in ~/dead.letter. We 1350 ** view this as being sufficiently important as to include it 1351 ** here. For example, if the system is dying, we shouldn't have 1352 ** to create another process plus some pipes to save the message. 1353 ** 1354 ** Parameters: 1355 ** filename -- the name of the file to send to. 1356 ** ctladdr -- the controlling address header -- includes 1357 ** the userid/groupid to be when sending. 1358 ** 1359 ** Returns: 1360 ** The exit code associated with the operation. 1361 ** 1362 ** Side Effects: 1363 ** none. 1364 */ 1365 1366 mailfile(filename, ctladdr, e) 1367 char *filename; 1368 ADDRESS *ctladdr; 1369 register ENVELOPE *e; 1370 { 1371 register FILE *f; 1372 register int pid; 1373 int mode; 1374 1375 /* 1376 ** Fork so we can change permissions here. 1377 ** Note that we MUST use fork, not vfork, because of 1378 ** the complications of calling subroutines, etc. 1379 */ 1380 1381 DOFORK(fork); 1382 1383 if (pid < 0) 1384 return (EX_OSERR); 1385 else if (pid == 0) 1386 { 1387 /* child -- actually write to file */ 1388 struct stat stb; 1389 1390 (void) signal(SIGINT, SIG_DFL); 1391 (void) signal(SIGHUP, SIG_DFL); 1392 (void) signal(SIGTERM, SIG_DFL); 1393 (void) umask(OldUmask); 1394 1395 if (stat(filename, &stb) < 0) 1396 stb.st_mode = 0666; 1397 mode = stb.st_mode; 1398 1399 /* limit the errors to those actually caused in the child */ 1400 errno = 0; 1401 ExitStat = EX_OK; 1402 1403 if (bitset(0111, stb.st_mode)) 1404 exit(EX_CANTCREAT); 1405 if (ctladdr == NULL) 1406 ctladdr = &e->e_from; 1407 else 1408 { 1409 /* ignore setuid and setgid bits */ 1410 mode &= ~(S_ISGID|S_ISUID); 1411 } 1412 1413 /* we have to open the dfile BEFORE setuid */ 1414 if (e->e_dfp == NULL && e->e_df != NULL) 1415 { 1416 e->e_dfp = fopen(e->e_df, "r"); 1417 if (e->e_dfp == NULL) 1418 { 1419 syserr("mailfile: Cannot open %s for %s from %s", 1420 e->e_df, e->e_to, e->e_from); 1421 } 1422 } 1423 1424 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1425 { 1426 if (ctladdr->q_uid == 0) 1427 { 1428 (void) setgid(DefGid); 1429 (void) initgroups(DefUser, DefGid); 1430 } 1431 else 1432 { 1433 (void) setgid(ctladdr->q_gid); 1434 (void) initgroups(ctladdr->q_ruser ? 1435 ctladdr->q_ruser : ctladdr->q_user, 1436 ctladdr->q_gid); 1437 } 1438 } 1439 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1440 { 1441 if (ctladdr->q_uid == 0) 1442 (void) setuid(DefUid); 1443 else 1444 (void) setuid(ctladdr->q_uid); 1445 } 1446 FileName = filename; 1447 LineNumber = 0; 1448 f = dfopen(filename, "a"); 1449 if (f == NULL) 1450 { 1451 message("554 cannot open"); 1452 exit(EX_CANTCREAT); 1453 } 1454 1455 putfromline(f, ProgMailer, e); 1456 (*e->e_puthdr)(f, ProgMailer, e); 1457 putline("\n", f, ProgMailer); 1458 (*e->e_putbody)(f, ProgMailer, e); 1459 putline("\n", f, ProgMailer); 1460 if (ferror(f)) 1461 { 1462 message("451 I/O error"); 1463 setstat(EX_IOERR); 1464 } 1465 (void) fclose(f); 1466 (void) fflush(stdout); 1467 1468 /* reset ISUID & ISGID bits for paranoid systems */ 1469 (void) chmod(filename, (int) stb.st_mode); 1470 exit(ExitStat); 1471 /*NOTREACHED*/ 1472 } 1473 else 1474 { 1475 /* parent -- wait for exit status */ 1476 int st; 1477 1478 st = waitfor(pid); 1479 if ((st & 0377) != 0) 1480 return (EX_UNAVAILABLE); 1481 else 1482 return ((st >> 8) & 0377); 1483 /*NOTREACHED*/ 1484 } 1485 } 1486 /* 1487 ** SENDALL -- actually send all the messages. 1488 ** 1489 ** Parameters: 1490 ** e -- the envelope to send. 1491 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1492 ** the current SendMode. 1493 ** 1494 ** Returns: 1495 ** none. 1496 ** 1497 ** Side Effects: 1498 ** Scans the send lists and sends everything it finds. 1499 ** Delivers any appropriate error messages. 1500 ** If we are running in a non-interactive mode, takes the 1501 ** appropriate action. 1502 */ 1503 1504 sendall(e, mode) 1505 ENVELOPE *e; 1506 char mode; 1507 { 1508 register ADDRESS *q; 1509 bool oldverbose; 1510 int pid; 1511 char *owner; 1512 int otherowners; 1513 ENVELOPE *splitenv = NULL; 1514 # ifdef LOCKF 1515 struct flock lfd; 1516 # endif 1517 1518 /* determine actual delivery mode */ 1519 if (mode == SM_DEFAULT) 1520 { 1521 extern bool shouldqueue(); 1522 1523 mode = SendMode; 1524 if (mode != SM_VERIFY && 1525 shouldqueue(e->e_msgpriority, e->e_ctime)) 1526 mode = SM_QUEUE; 1527 } 1528 1529 if (tTd(13, 1)) 1530 { 1531 printf("\nSENDALL: mode %c, sendqueue:\n", mode); 1532 printaddr(e->e_sendqueue, TRUE); 1533 } 1534 1535 /* 1536 ** Do any preprocessing necessary for the mode we are running. 1537 ** Check to make sure the hop count is reasonable. 1538 ** Delete sends to the sender in mailing lists. 1539 */ 1540 1541 CurEnv = e; 1542 1543 if (e->e_hopcount > MaxHopCount) 1544 { 1545 errno = 0; 1546 syserr("554 too many hops %d (%d max): from %s, to %s", 1547 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 1548 e->e_sendqueue->q_paddr); 1549 return; 1550 } 1551 1552 if (!MeToo) 1553 { 1554 extern ADDRESS *recipient(); 1555 1556 e->e_from.q_flags |= QDONTSEND; 1557 if (tTd(13, 5)) 1558 { 1559 printf("sendall: QDONTSEND "); 1560 printaddr(&e->e_from, FALSE); 1561 } 1562 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1563 } 1564 1565 /* 1566 ** Handle alias owners. 1567 ** 1568 ** We scan up the q_alias chain looking for owners. 1569 ** We discard owners that are the same as the return path. 1570 */ 1571 1572 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1573 { 1574 register struct address *a; 1575 1576 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 1577 continue; 1578 if (a != NULL) 1579 q->q_owner = a->q_owner; 1580 1581 if (q->q_owner != NULL && !bitset(QDONTSEND, q->q_flags) && 1582 strcmp(q->q_owner, e->e_returnpath) == 0) 1583 q->q_owner = NULL; 1584 } 1585 1586 owner = ""; 1587 otherowners = 1; 1588 while (owner != NULL && otherowners > 0) 1589 { 1590 owner = NULL; 1591 otherowners = 0; 1592 1593 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1594 { 1595 if (bitset(QDONTSEND, q->q_flags)) 1596 continue; 1597 1598 if (q->q_owner != NULL) 1599 { 1600 if (owner == NULL) 1601 owner = q->q_owner; 1602 else if (owner != q->q_owner) 1603 { 1604 if (strcmp(owner, q->q_owner) == 0) 1605 { 1606 /* make future comparisons cheap */ 1607 q->q_owner = owner; 1608 } 1609 else 1610 { 1611 otherowners++; 1612 } 1613 owner = q->q_owner; 1614 } 1615 } 1616 else 1617 { 1618 otherowners++; 1619 } 1620 } 1621 1622 if (owner != NULL && otherowners > 0) 1623 { 1624 register ENVELOPE *ee; 1625 extern HDR *copyheader(); 1626 extern ADDRESS *copyqueue(); 1627 1628 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 1629 STRUCTCOPY(*e, *ee); 1630 ee->e_id = NULL; 1631 ee->e_parent = e; 1632 ee->e_header = copyheader(e->e_header); 1633 ee->e_sendqueue = copyqueue(e->e_sendqueue); 1634 ee->e_errorqueue = copyqueue(e->e_errorqueue); 1635 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE); 1636 ee->e_returnpath = owner; 1637 ee->e_putbody = parentbody; 1638 ee->e_sibling = splitenv; 1639 splitenv = ee; 1640 1641 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1642 if (q->q_owner == owner) 1643 q->q_flags |= QDONTSEND; 1644 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 1645 if (q->q_owner != owner) 1646 q->q_flags |= QDONTSEND; 1647 1648 if (e->e_df != NULL && mode != SM_VERIFY) 1649 { 1650 ee->e_dfp = NULL; 1651 ee->e_df = newstr(queuename(ee, 'd')); 1652 if (link(e->e_df, ee->e_df) < 0) 1653 { 1654 syserr("sendall: link(%s, %s)", 1655 e->e_df, ee->e_df); 1656 } 1657 } 1658 } 1659 } 1660 1661 if (owner != NULL) 1662 e->e_returnpath = owner; 1663 1664 # ifdef QUEUE 1665 if ((mode == SM_QUEUE || mode == SM_FORK || 1666 (mode != SM_VERIFY && SuperSafe)) && 1667 !bitset(EF_INQUEUE, e->e_flags)) 1668 queueup(e, TRUE, mode == SM_QUEUE); 1669 #endif /* QUEUE */ 1670 1671 if (splitenv != NULL) 1672 { 1673 if (tTd(13, 1)) 1674 { 1675 printf("\nsendall: Split queue; remaining queue:\n"); 1676 printaddr(e->e_sendqueue, TRUE); 1677 } 1678 1679 while (splitenv != NULL) 1680 { 1681 sendall(splitenv, mode); 1682 splitenv = splitenv->e_sibling; 1683 } 1684 1685 CurEnv = e; 1686 } 1687 1688 oldverbose = Verbose; 1689 switch (mode) 1690 { 1691 case SM_VERIFY: 1692 Verbose = TRUE; 1693 break; 1694 1695 case SM_QUEUE: 1696 queueonly: 1697 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1698 return; 1699 1700 case SM_FORK: 1701 if (e->e_xfp != NULL) 1702 (void) fflush(e->e_xfp); 1703 1704 # ifdef LOCKF 1705 /* 1706 ** Since lockf has the interesting semantic that the 1707 ** lock is lost when we fork, we have to risk losing 1708 ** the lock here by closing before the fork, and then 1709 ** trying to get it back in the child. 1710 */ 1711 1712 if (e->e_lockfp != NULL) 1713 { 1714 (void) fclose(e->e_lockfp); 1715 e->e_lockfp = NULL; 1716 } 1717 # endif /* LOCKF */ 1718 1719 pid = fork(); 1720 if (pid < 0) 1721 { 1722 goto queueonly; 1723 } 1724 else if (pid > 0) 1725 { 1726 /* be sure we leave the temp files to our child */ 1727 e->e_id = e->e_df = NULL; 1728 # ifndef LOCKF 1729 if (e->e_lockfp != NULL) 1730 { 1731 (void) fclose(e->e_lockfp); 1732 e->e_lockfp = NULL; 1733 } 1734 # endif 1735 1736 /* close any random open files in the envelope */ 1737 if (e->e_dfp != NULL) 1738 { 1739 (void) fclose(e->e_dfp); 1740 e->e_dfp = NULL; 1741 } 1742 if (e->e_xfp != NULL) 1743 { 1744 (void) fclose(e->e_xfp); 1745 e->e_xfp = NULL; 1746 } 1747 return; 1748 } 1749 1750 /* double fork to avoid zombies */ 1751 if (fork() > 0) 1752 exit(EX_OK); 1753 1754 /* be sure we are immune from the terminal */ 1755 disconnect(FALSE); 1756 1757 # ifdef LOCKF 1758 /* 1759 ** Now try to get our lock back. 1760 */ 1761 1762 lfd.l_type = F_WRLCK; 1763 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1764 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1765 if (e->e_lockfp == NULL || 1766 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1767 { 1768 /* oops.... lost it */ 1769 # ifdef LOG 1770 if (LogLevel > 29) 1771 syslog(LOG_NOTICE, "%s: lost lock: %m", 1772 e->e_id); 1773 # endif /* LOG */ 1774 exit(EX_OK); 1775 } 1776 # endif /* LOCKF */ 1777 1778 /* 1779 ** Close any cached connections. 1780 ** 1781 ** We don't send the QUIT protocol because the parent 1782 ** still knows about the connection. 1783 ** 1784 ** This should only happen when delivering an error 1785 ** message. 1786 */ 1787 1788 mci_flush(FALSE, NULL); 1789 1790 break; 1791 } 1792 1793 /* 1794 ** Run through the list and send everything. 1795 */ 1796 1797 e->e_nsent = 0; 1798 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1799 { 1800 if (mode == SM_VERIFY) 1801 { 1802 e->e_to = q->q_paddr; 1803 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1804 message("deliverable"); 1805 } 1806 else if (!bitset(QDONTSEND, q->q_flags)) 1807 { 1808 # ifdef QUEUE 1809 /* 1810 ** Checkpoint the send list every few addresses 1811 */ 1812 1813 if (e->e_nsent >= CheckpointInterval) 1814 { 1815 queueup(e, TRUE, FALSE); 1816 e->e_nsent = 0; 1817 } 1818 # endif /* QUEUE */ 1819 (void) deliver(e, q); 1820 } 1821 } 1822 Verbose = oldverbose; 1823 1824 /* 1825 ** Now run through and check for errors. 1826 */ 1827 1828 if (mode == SM_VERIFY) 1829 return; 1830 1831 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1832 { 1833 if (tTd(13, 3)) 1834 { 1835 printf("Checking "); 1836 printaddr(q, FALSE); 1837 } 1838 1839 /* only send errors if the message failed */ 1840 if (!bitset(QBADADDR, q->q_flags)) 1841 continue; 1842 1843 if (q->q_owner == NULL && strcmp(e->e_from.q_paddr, "<>") != 0) 1844 (void) sendtolist(e->e_from.q_paddr, NULL, 1845 &e->e_errorqueue, e); 1846 } 1847 1848 if (mode == SM_FORK) 1849 finis(); 1850 } 1851 /* 1852 ** HOSTSIGNATURE -- return the "signature" for a host. 1853 ** 1854 ** The signature describes how we are going to send this -- it 1855 ** can be just the hostname (for non-Internet hosts) or can be 1856 ** an ordered list of MX hosts. 1857 ** 1858 ** Parameters: 1859 ** m -- the mailer describing this host. 1860 ** host -- the host name. 1861 ** e -- the current envelope. 1862 ** 1863 ** Returns: 1864 ** The signature for this host. 1865 ** 1866 ** Side Effects: 1867 ** Can tweak the symbol table. 1868 */ 1869 1870 char * 1871 hostsignature(m, host, e) 1872 register MAILER *m; 1873 char *host; 1874 ENVELOPE *e; 1875 { 1876 register char *p; 1877 register STAB *s; 1878 int i; 1879 int len; 1880 #ifdef NAMED_BIND 1881 int nmx; 1882 auto int rcode; 1883 char *mxhosts[MAXMXHOSTS + 1]; 1884 static char myhostbuf[MAXNAME]; 1885 #endif 1886 1887 /* 1888 ** Check to see if this uses IPC -- if not, it can't have MX records. 1889 */ 1890 1891 p = m->m_mailer; 1892 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1893 { 1894 /* just an ordinary mailer */ 1895 return host; 1896 } 1897 1898 /* 1899 ** If it is a numeric address, just return it. 1900 */ 1901 1902 if (host[0] == '[') 1903 return host; 1904 1905 /* 1906 ** Look it up in the symbol table. 1907 */ 1908 1909 s = stab(host, ST_HOSTSIG, ST_ENTER); 1910 if (s->s_hostsig != NULL) 1911 return s->s_hostsig; 1912 1913 /* 1914 ** Not already there -- create a signature. 1915 */ 1916 1917 #ifdef NAMED_BIND 1918 if (myhostbuf[0] == '\0') 1919 expand("\201j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1920 1921 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1922 if (nmx <= 0) 1923 { 1924 register MCI *mci; 1925 extern int errno; 1926 extern MCI *mci_get(); 1927 1928 /* update the connection info for this host */ 1929 mci = mci_get(host, m); 1930 mci->mci_exitstat = rcode; 1931 mci->mci_errno = errno; 1932 1933 /* and return the original host name as the signature */ 1934 s->s_hostsig = host; 1935 return host; 1936 } 1937 1938 len = 0; 1939 for (i = 0; i < nmx; i++) 1940 { 1941 len += strlen(mxhosts[i]) + 1; 1942 } 1943 s->s_hostsig = p = xalloc(len); 1944 for (i = 0; i < nmx; i++) 1945 { 1946 if (i != 0) 1947 *p++ = ':'; 1948 strcpy(p, mxhosts[i]); 1949 p += strlen(p); 1950 } 1951 makelower(s->s_hostsig); 1952 #else 1953 /* not using BIND -- the signature is just the host name */ 1954 s->s_hostsig = host; 1955 #endif 1956 if (tTd(17, 1)) 1957 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1958 return s->s_hostsig; 1959 } 1960