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 6.46 (Berkeley) 03/17/93"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <signal.h> 15 #include <sys/stat.h> 16 #include <netdb.h> 17 #include <errno.h> 18 #ifdef NAMED_BIND 19 #include <arpa/nameser.h> 20 #include <resolv.h> 21 #endif 22 23 /* 24 ** DELIVER -- Deliver a message to a list of addresses. 25 ** 26 ** This routine delivers to everyone on the same host as the 27 ** user on the head of the list. It is clever about mailers 28 ** that don't handle multiple users. It is NOT guaranteed 29 ** that it will deliver to all these addresses however -- so 30 ** deliver should be called once for each address on the 31 ** list. 32 ** 33 ** Parameters: 34 ** e -- the envelope to deliver. 35 ** firstto -- head of the address list to deliver to. 36 ** 37 ** Returns: 38 ** zero -- successfully delivered. 39 ** else -- some failure, see ExitStat for more info. 40 ** 41 ** Side Effects: 42 ** The standard input is passed off to someone. 43 */ 44 45 deliver(e, firstto) 46 register ENVELOPE *e; 47 ADDRESS *firstto; 48 { 49 char *host; /* host being sent to */ 50 char *user; /* user being sent to */ 51 char **pvp; 52 register char **mvp; 53 register char *p; 54 register MAILER *m; /* mailer for this recipient */ 55 ADDRESS *ctladdr; 56 register MCI *mci; 57 register ADDRESS *to = firstto; 58 bool clever = FALSE; /* running user smtp to this mailer */ 59 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 60 int rcode; /* response code */ 61 char *firstsig; /* signature of firstto */ 62 char *pv[MAXPV+1]; 63 char tobuf[MAXLINE-50]; /* text line of to people */ 64 char buf[MAXNAME]; 65 char rpathbuf[MAXNAME]; /* translated return path */ 66 extern int checkcompat(); 67 extern ADDRESS *getctladdr(); 68 extern char *remotename(); 69 extern MCI *openmailer(); 70 extern char *hostsignature(); 71 72 errno = 0; 73 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 74 return (0); 75 76 #ifdef NAMED_BIND 77 /* unless interactive, try twice, over a minute */ 78 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) { 79 _res.retrans = 30; 80 _res.retry = 2; 81 } 82 #endif 83 84 m = to->q_mailer; 85 host = to->q_host; 86 87 if (tTd(10, 1)) 88 printf("\n--deliver, mailer=%d, host=`%s', first user=`%s'\n", 89 m->m_mno, host, to->q_user); 90 91 /* 92 ** If this mailer is expensive, and if we don't want to make 93 ** connections now, just mark these addresses and return. 94 ** This is useful if we want to batch connections to 95 ** reduce load. This will cause the messages to be 96 ** queued up, and a daemon will come along to send the 97 ** messages later. 98 ** This should be on a per-mailer basis. 99 */ 100 101 if (NoConnect && !QueueRun && bitnset(M_EXPENSIVE, m->m_flags) && 102 !Verbose) 103 { 104 for (; to != NULL; to = to->q_next) 105 { 106 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 107 to->q_mailer != m) 108 continue; 109 to->q_flags |= QQUEUEUP|QDONTSEND; 110 e->e_to = to->q_paddr; 111 message("queued"); 112 if (LogLevel > 8) 113 logdelivery(m, NULL, "queued", e); 114 } 115 e->e_to = NULL; 116 return (0); 117 } 118 119 /* 120 ** Do initial argv setup. 121 ** Insert the mailer name. Notice that $x expansion is 122 ** NOT done on the mailer name. Then, if the mailer has 123 ** a picky -f flag, we insert it as appropriate. This 124 ** code does not check for 'pv' overflow; this places a 125 ** manifest lower limit of 4 for MAXPV. 126 ** The from address rewrite is expected to make 127 ** the address relative to the other end. 128 */ 129 130 /* rewrite from address, using rewriting rules */ 131 (void) strcpy(rpathbuf, remotename(e->e_from.q_paddr, m, TRUE, FALSE, 132 TRUE, FALSE, e)); 133 134 define('f', e->e_from.q_paddr, e); /* raw return path */ 135 define('g', rpathbuf, e); /* translated return path */ 136 define('h', host, e); /* to host */ 137 Errors = 0; 138 pvp = pv; 139 *pvp++ = m->m_argv[0]; 140 141 /* insert -f or -r flag as appropriate */ 142 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 143 { 144 if (bitnset(M_FOPT, m->m_flags)) 145 *pvp++ = "-f"; 146 else 147 *pvp++ = "-r"; 148 *pvp++ = newstr(rpathbuf); 149 } 150 151 /* 152 ** Append the other fixed parts of the argv. These run 153 ** up to the first entry containing "$u". There can only 154 ** be one of these, and there are only a few more slots 155 ** in the pv after it. 156 */ 157 158 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 159 { 160 /* can't use strchr here because of sign extension problems */ 161 while (*p != '\0') 162 { 163 if ((*p++ & 0377) == MACROEXPAND) 164 { 165 if (*p == 'u') 166 break; 167 } 168 } 169 170 if (*p != '\0') 171 break; 172 173 /* this entry is safe -- go ahead and process it */ 174 expand(*mvp, buf, &buf[sizeof buf - 1], e); 175 *pvp++ = newstr(buf); 176 if (pvp >= &pv[MAXPV - 3]) 177 { 178 syserr("554 Too many parameters to %s before $u", pv[0]); 179 return (-1); 180 } 181 } 182 183 /* 184 ** If we have no substitution for the user name in the argument 185 ** list, we know that we must supply the names otherwise -- and 186 ** SMTP is the answer!! 187 */ 188 189 if (*mvp == NULL) 190 { 191 /* running SMTP */ 192 # ifdef SMTP 193 clever = TRUE; 194 *pvp = NULL; 195 # else /* SMTP */ 196 /* oops! we don't implement SMTP */ 197 syserr("554 SMTP style mailer"); 198 return (EX_SOFTWARE); 199 # endif /* SMTP */ 200 } 201 202 /* 203 ** At this point *mvp points to the argument with $u. We 204 ** run through our address list and append all the addresses 205 ** we can. If we run out of space, do not fret! We can 206 ** always send another copy later. 207 */ 208 209 tobuf[0] = '\0'; 210 e->e_to = tobuf; 211 ctladdr = NULL; 212 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 213 for (; to != NULL; to = to->q_next) 214 { 215 /* avoid sending multiple recipients to dumb mailers */ 216 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 217 break; 218 219 /* if already sent or not for this host, don't send */ 220 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 221 to->q_mailer != firstto->q_mailer || 222 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 223 continue; 224 225 /* avoid overflowing tobuf */ 226 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 227 break; 228 229 if (tTd(10, 1)) 230 { 231 printf("\nsend to "); 232 printaddr(to, FALSE); 233 } 234 235 /* compute effective uid/gid when sending */ 236 if (to->q_mailer == ProgMailer) 237 ctladdr = getctladdr(to); 238 239 user = to->q_user; 240 e->e_to = to->q_paddr; 241 if (tTd(10, 5)) 242 { 243 printf("deliver: QDONTSEND "); 244 printaddr(to, FALSE); 245 } 246 to->q_flags |= QDONTSEND; 247 248 /* 249 ** Check to see that these people are allowed to 250 ** talk to each other. 251 */ 252 253 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 254 { 255 NoReturn = TRUE; 256 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 257 giveresponse(EX_UNAVAILABLE, m, NULL, e); 258 continue; 259 } 260 rcode = checkcompat(to, e); 261 if (rcode != EX_OK) 262 { 263 giveresponse(rcode, m, NULL, e); 264 continue; 265 } 266 267 /* 268 ** Strip quote bits from names if the mailer is dumb 269 ** about them. 270 */ 271 272 if (bitnset(M_STRIPQ, m->m_flags)) 273 { 274 stripquotes(user); 275 stripquotes(host); 276 } 277 278 /* hack attack -- delivermail compatibility */ 279 if (m == ProgMailer && *user == '|') 280 user++; 281 282 /* 283 ** If an error message has already been given, don't 284 ** bother to send to this address. 285 ** 286 ** >>>>>>>>>> This clause assumes that the local mailer 287 ** >> NOTE >> cannot do any further aliasing; that 288 ** >>>>>>>>>> function is subsumed by sendmail. 289 */ 290 291 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 292 continue; 293 294 /* save statistics.... */ 295 markstats(e, to); 296 297 /* 298 ** See if this user name is "special". 299 ** If the user name has a slash in it, assume that this 300 ** is a file -- send it off without further ado. Note 301 ** that this type of addresses is not processed along 302 ** with the others, so we fudge on the To person. 303 */ 304 305 if (m == FileMailer) 306 { 307 rcode = mailfile(user, getctladdr(to), e); 308 giveresponse(rcode, m, NULL, e); 309 if (rcode == EX_OK) 310 to->q_flags |= QSENT; 311 continue; 312 } 313 314 /* 315 ** Address is verified -- add this user to mailer 316 ** argv, and add it to the print list of recipients. 317 */ 318 319 /* link together the chain of recipients */ 320 to->q_tchain = tochain; 321 tochain = to; 322 323 /* create list of users for error messages */ 324 (void) strcat(tobuf, ","); 325 (void) strcat(tobuf, to->q_paddr); 326 define('u', user, e); /* to user */ 327 define('z', to->q_home, e); /* user's home */ 328 329 /* 330 ** Expand out this user into argument list. 331 */ 332 333 if (!clever) 334 { 335 expand(*mvp, buf, &buf[sizeof buf - 1], e); 336 *pvp++ = newstr(buf); 337 if (pvp >= &pv[MAXPV - 2]) 338 { 339 /* allow some space for trailing parms */ 340 break; 341 } 342 } 343 } 344 345 /* see if any addresses still exist */ 346 if (tobuf[0] == '\0') 347 { 348 define('g', (char *) NULL, e); 349 return (0); 350 } 351 352 /* print out messages as full list */ 353 e->e_to = tobuf + 1; 354 355 /* 356 ** Fill out any parameters after the $u parameter. 357 */ 358 359 while (!clever && *++mvp != NULL) 360 { 361 expand(*mvp, buf, &buf[sizeof buf - 1], e); 362 *pvp++ = newstr(buf); 363 if (pvp >= &pv[MAXPV]) 364 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 365 } 366 *pvp++ = NULL; 367 368 /* 369 ** Call the mailer. 370 ** The argument vector gets built, pipes 371 ** are created as necessary, and we fork & exec as 372 ** appropriate. 373 ** If we are running SMTP, we just need to clean up. 374 */ 375 376 if (ctladdr == NULL && m != ProgMailer) 377 ctladdr = &e->e_from; 378 #ifdef NAMED_BIND 379 if (ConfigLevel < 2) 380 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 381 #endif 382 mci = openmailer(m, pv, ctladdr, clever, e); 383 if (mci == NULL) 384 { 385 /* catastrophic error */ 386 rcode = EX_OSERR; 387 goto give_up; 388 } 389 else if (mci->mci_state != MCIS_OPEN) 390 { 391 /* couldn't open the mailer */ 392 rcode = mci->mci_exitstat; 393 errno = mci->mci_errno; 394 if (rcode == EX_OK) 395 { 396 /* shouldn't happen */ 397 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 398 rcode, mci->mci_state, firstsig); 399 rcode = EX_SOFTWARE; 400 } 401 } 402 else if (!clever) 403 { 404 /* 405 ** Format and send message. 406 */ 407 408 putfromline(mci->mci_out, m, e); 409 (*e->e_puthdr)(mci->mci_out, m, e); 410 putline("\n", mci->mci_out, m); 411 (*e->e_putbody)(mci->mci_out, m, e); 412 413 /* get the exit status */ 414 rcode = endmailer(mci, pv[0]); 415 } 416 else 417 #ifdef SMTP 418 { 419 /* 420 ** Send the MAIL FROM: protocol 421 */ 422 423 rcode = smtpmailfrom(m, mci, e); 424 if (rcode == EX_OK) 425 { 426 register char *t = tobuf; 427 register int i; 428 429 /* send the recipient list */ 430 tobuf[0] = '\0'; 431 for (to = tochain; to != NULL; to = to->q_tchain) 432 { 433 e->e_to = to->q_paddr; 434 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 435 { 436 markfailure(e, to, i); 437 giveresponse(i, m, mci, e); 438 } 439 else 440 { 441 *t++ = ','; 442 for (p = to->q_paddr; *p; *t++ = *p++) 443 continue; 444 } 445 } 446 447 /* now send the data */ 448 if (tobuf[0] == '\0') 449 { 450 e->e_to = NULL; 451 if (bitset(MCIF_CACHED, mci->mci_flags)) 452 smtprset(m, mci, e); 453 } 454 else 455 { 456 e->e_to = tobuf + 1; 457 rcode = smtpdata(m, mci, e); 458 } 459 460 /* now close the connection */ 461 if (!bitset(MCIF_CACHED, mci->mci_flags)) 462 smtpquit(m, mci, e); 463 } 464 } 465 #else /* not SMTP */ 466 { 467 syserr("554 deliver: need SMTP compiled to use clever mailer"); 468 rcode = EX_CONFIG; 469 goto give_up; 470 } 471 #endif /* SMTP */ 472 #ifdef NAMED_BIND 473 if (ConfigLevel < 2) 474 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 475 #endif 476 477 /* arrange a return receipt if requested */ 478 if (e->e_receiptto != NULL && bitnset(M_LOCALMAILER, m->m_flags)) 479 { 480 e->e_flags |= EF_SENDRECEIPT; 481 /* do we want to send back more info? */ 482 } 483 484 /* 485 ** Do final status disposal. 486 ** We check for something in tobuf for the SMTP case. 487 ** If we got a temporary failure, arrange to queue the 488 ** addressees. 489 */ 490 491 give_up: 492 if (tobuf[0] != '\0') 493 giveresponse(rcode, m, mci, e); 494 for (to = tochain; to != NULL; to = to->q_tchain) 495 { 496 if (rcode != EX_OK) 497 markfailure(e, to, rcode); 498 else 499 { 500 to->q_flags |= QSENT; 501 e->e_nsent++; 502 } 503 } 504 505 /* 506 ** Restore state and return. 507 */ 508 509 errno = 0; 510 define('g', (char *) NULL, e); 511 return (rcode); 512 } 513 /* 514 ** MARKFAILURE -- mark a failure on a specific address. 515 ** 516 ** Parameters: 517 ** e -- the envelope we are sending. 518 ** q -- the address to mark. 519 ** rcode -- the code signifying the particular failure. 520 ** 521 ** Returns: 522 ** none. 523 ** 524 ** Side Effects: 525 ** marks the address (and possibly the envelope) with the 526 ** failure so that an error will be returned or 527 ** the message will be queued, as appropriate. 528 */ 529 530 markfailure(e, q, rcode) 531 register ENVELOPE *e; 532 register ADDRESS *q; 533 int rcode; 534 { 535 if (rcode == EX_OK) 536 return; 537 else if (rcode != EX_TEMPFAIL && rcode != EX_IOERR && rcode != EX_OSERR) 538 q->q_flags |= QBADADDR; 539 else if (curtime() > e->e_ctime + TimeOut) 540 { 541 extern char *pintvl(); 542 char buf[MAXLINE]; 543 544 if (!bitset(EF_TIMEOUT, e->e_flags)) 545 { 546 (void) sprintf(buf, "Cannot send message for %s", 547 pintvl(TimeOut, FALSE)); 548 if (e->e_message != NULL) 549 free(e->e_message); 550 e->e_message = newstr(buf); 551 message(buf); 552 } 553 q->q_flags |= QBADADDR; 554 e->e_flags |= EF_TIMEOUT; 555 fprintf(e->e_xfp, "421 %s... Message timed out\n", q->q_paddr); 556 } 557 else 558 q->q_flags |= QQUEUEUP; 559 } 560 /* 561 ** DOFORK -- do a fork, retrying a couple of times on failure. 562 ** 563 ** This MUST be a macro, since after a vfork we are running 564 ** two processes on the same stack!!! 565 ** 566 ** Parameters: 567 ** none. 568 ** 569 ** Returns: 570 ** From a macro??? You've got to be kidding! 571 ** 572 ** Side Effects: 573 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 574 ** pid of child in parent, zero in child. 575 ** -1 on unrecoverable error. 576 ** 577 ** Notes: 578 ** I'm awfully sorry this looks so awful. That's 579 ** vfork for you..... 580 */ 581 582 # define NFORKTRIES 5 583 584 # ifndef FORK 585 # define FORK fork 586 # endif 587 588 # define DOFORK(fORKfN) \ 589 {\ 590 register int i;\ 591 \ 592 for (i = NFORKTRIES; --i >= 0; )\ 593 {\ 594 pid = fORKfN();\ 595 if (pid >= 0)\ 596 break;\ 597 if (i > 0)\ 598 sleep((unsigned) NFORKTRIES - i);\ 599 }\ 600 } 601 /* 602 ** DOFORK -- simple fork interface to DOFORK. 603 ** 604 ** Parameters: 605 ** none. 606 ** 607 ** Returns: 608 ** pid of child in parent. 609 ** zero in child. 610 ** -1 on error. 611 ** 612 ** Side Effects: 613 ** returns twice, once in parent and once in child. 614 */ 615 616 dofork() 617 { 618 register int pid; 619 620 DOFORK(fork); 621 return (pid); 622 } 623 /* 624 ** ENDMAILER -- Wait for mailer to terminate. 625 ** 626 ** We should never get fatal errors (e.g., segmentation 627 ** violation), so we report those specially. For other 628 ** errors, we choose a status message (into statmsg), 629 ** and if it represents an error, we print it. 630 ** 631 ** Parameters: 632 ** pid -- pid of mailer. 633 ** name -- name of mailer (for error messages). 634 ** 635 ** Returns: 636 ** exit code of mailer. 637 ** 638 ** Side Effects: 639 ** none. 640 */ 641 642 endmailer(mci, name) 643 register MCI *mci; 644 char *name; 645 { 646 int st; 647 648 /* close any connections */ 649 if (mci->mci_in != NULL) 650 (void) xfclose(mci->mci_in, name, "mci_in"); 651 if (mci->mci_out != NULL) 652 (void) xfclose(mci->mci_out, name, "mci_out"); 653 mci->mci_in = mci->mci_out = NULL; 654 mci->mci_state = MCIS_CLOSED; 655 656 /* in the IPC case there is nothing to wait for */ 657 if (mci->mci_pid == 0) 658 return (EX_OK); 659 660 /* wait for the mailer process to die and collect status */ 661 st = waitfor(mci->mci_pid); 662 if (st == -1) 663 { 664 syserr("endmailer %s: wait", name); 665 return (EX_SOFTWARE); 666 } 667 668 /* see if it died a horrid death */ 669 if ((st & 0377) != 0) 670 { 671 syserr("mailer %s died with signal %o", name, st); 672 ExitStat = EX_TEMPFAIL; 673 return (EX_TEMPFAIL); 674 } 675 676 /* normal death -- return status */ 677 st = (st >> 8) & 0377; 678 return (st); 679 } 680 /* 681 ** OPENMAILER -- open connection to mailer. 682 ** 683 ** Parameters: 684 ** m -- mailer descriptor. 685 ** pvp -- parameter vector to pass to mailer. 686 ** ctladdr -- controlling address for user. 687 ** clever -- create a full duplex connection. 688 ** 689 ** Returns: 690 ** The mail connection info struct for this connection. 691 ** NULL on failure. 692 ** 693 ** Side Effects: 694 ** creates a mailer in a subprocess. 695 */ 696 697 MCI * 698 openmailer(m, pvp, ctladdr, clever, e) 699 MAILER *m; 700 char **pvp; 701 ADDRESS *ctladdr; 702 bool clever; 703 ENVELOPE *e; 704 { 705 int pid; 706 register MCI *mci; 707 int mpvect[2]; 708 int rpvect[2]; 709 extern FILE *fdopen(); 710 711 if (tTd(11, 1)) 712 { 713 printf("openmailer:"); 714 printav(pvp); 715 } 716 errno = 0; 717 718 CurHostName = m->m_mailer; 719 720 /* 721 ** Deal with the special case of mail handled through an IPC 722 ** connection. 723 ** In this case we don't actually fork. We must be 724 ** running SMTP for this to work. We will return a 725 ** zero pid to indicate that we are running IPC. 726 ** We also handle a debug version that just talks to stdin/out. 727 */ 728 729 /* check for Local Person Communication -- not for mortals!!! */ 730 if (strcmp(m->m_mailer, "[LPC]") == 0) 731 { 732 mci = (MCI *) xalloc(sizeof *mci); 733 bzero((char *) mci, sizeof *mci); 734 mci->mci_in = stdin; 735 mci->mci_out = stdout; 736 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 737 mci->mci_mailer = m; 738 } 739 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 740 strcmp(m->m_mailer, "[TCP]") == 0) 741 { 742 #ifdef DAEMON 743 register int i; 744 register u_short port; 745 char *curhost; 746 extern MCI *mci_get(); 747 extern char *hostsignature(); 748 749 CurHostName = pvp[1]; 750 curhost = hostsignature(m, pvp[1], e); 751 752 if (curhost == NULL || curhost[0] == '\0') 753 { 754 syserr("null signature"); 755 return NULL; 756 } 757 758 if (!clever) 759 { 760 syserr("554 non-clever IPC"); 761 return NULL; 762 } 763 if (pvp[2] != NULL) 764 port = atoi(pvp[2]); 765 else 766 port = 0; 767 while (*curhost != '\0') 768 { 769 register char *p; 770 static char hostbuf[MAXNAME]; 771 772 /* pull the next host from the signature */ 773 p = strchr(curhost, ':'); 774 if (p == NULL) 775 p = &curhost[strlen(curhost)]; 776 strncpy(hostbuf, curhost, p - curhost); 777 hostbuf[p - curhost] = '\0'; 778 if (*p != '\0') 779 p++; 780 curhost = p; 781 782 /* see if we already know that this host is fried */ 783 CurHostName = hostbuf; 784 mci = mci_get(hostbuf, m); 785 if (mci->mci_state != MCIS_CLOSED) 786 { 787 if (tTd(11, 1)) 788 { 789 printf("openmailer: "); 790 mci_dump(mci); 791 } 792 CurHostName = mci->mci_host; 793 return mci; 794 } 795 mci->mci_mailer = m; 796 if (mci->mci_exitstat != EX_OK) 797 continue; 798 799 /* try the connection */ 800 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 801 message("Connecting to %s (%s)...", 802 hostbuf, m->m_name); 803 i = makeconnection(hostbuf, port, mci, 804 bitnset(M_SECURE_PORT, m->m_flags)); 805 mci->mci_exitstat = i; 806 mci->mci_errno = errno; 807 if (i == EX_OK) 808 { 809 mci->mci_state = MCIS_OPENING; 810 mci_cache(mci); 811 break; 812 } 813 else if (tTd(11, 1)) 814 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 815 i, errno); 816 817 818 /* enter status of this host */ 819 setstat(i); 820 } 821 mci->mci_pid = 0; 822 #else /* no DAEMON */ 823 syserr("554 openmailer: no IPC"); 824 if (tTd(11, 1)) 825 printf("openmailer: NULL\n"); 826 return NULL; 827 #endif /* DAEMON */ 828 } 829 else 830 { 831 /* create a pipe to shove the mail through */ 832 if (pipe(mpvect) < 0) 833 { 834 syserr("openmailer: pipe (to mailer)"); 835 if (tTd(11, 1)) 836 printf("openmailer: NULL\n"); 837 return NULL; 838 } 839 840 /* if this mailer speaks smtp, create a return pipe */ 841 if (clever && pipe(rpvect) < 0) 842 { 843 syserr("openmailer: pipe (from mailer)"); 844 (void) close(mpvect[0]); 845 (void) close(mpvect[1]); 846 if (tTd(11, 1)) 847 printf("openmailer: NULL\n"); 848 return NULL; 849 } 850 851 /* 852 ** Actually fork the mailer process. 853 ** DOFORK is clever about retrying. 854 ** 855 ** Dispose of SIGCHLD signal catchers that may be laying 856 ** around so that endmail will get it. 857 */ 858 859 if (e->e_xfp != NULL) 860 (void) fflush(e->e_xfp); /* for debugging */ 861 (void) fflush(stdout); 862 # ifdef SIGCHLD 863 (void) signal(SIGCHLD, SIG_DFL); 864 # endif /* SIGCHLD */ 865 DOFORK(FORK); 866 /* pid is set by DOFORK */ 867 if (pid < 0) 868 { 869 /* failure */ 870 syserr("openmailer: cannot fork"); 871 (void) close(mpvect[0]); 872 (void) close(mpvect[1]); 873 if (clever) 874 { 875 (void) close(rpvect[0]); 876 (void) close(rpvect[1]); 877 } 878 if (tTd(11, 1)) 879 printf("openmailer: NULL\n"); 880 return NULL; 881 } 882 else if (pid == 0) 883 { 884 int i; 885 int saveerrno; 886 char **ep; 887 char *env[MAXUSERENVIRON]; 888 extern char **environ; 889 extern int DtableSize; 890 891 /* child -- set up input & exec mailer */ 892 /* make diagnostic output be standard output */ 893 (void) signal(SIGINT, SIG_IGN); 894 (void) signal(SIGHUP, SIG_IGN); 895 (void) signal(SIGTERM, SIG_DFL); 896 897 /* close any other cached connections */ 898 mci_flush(FALSE, mci); 899 900 /* arrange to filter std & diag output of command */ 901 if (clever) 902 { 903 (void) close(rpvect[0]); 904 (void) close(1); 905 (void) dup(rpvect[1]); 906 (void) close(rpvect[1]); 907 } 908 else if (OpMode == MD_SMTP || HoldErrs) 909 { 910 /* put mailer output in transcript */ 911 (void) close(1); 912 (void) dup(fileno(e->e_xfp)); 913 } 914 (void) close(2); 915 (void) dup(1); 916 917 /* arrange to get standard input */ 918 (void) close(mpvect[1]); 919 (void) close(0); 920 if (dup(mpvect[0]) < 0) 921 { 922 syserr("Cannot dup to zero!"); 923 _exit(EX_OSERR); 924 } 925 (void) close(mpvect[0]); 926 if (!bitnset(M_RESTR, m->m_flags)) 927 { 928 if (ctladdr == NULL || ctladdr->q_uid == 0) 929 { 930 (void) setgid(DefGid); 931 (void) initgroups(DefUser, DefGid); 932 (void) setuid(DefUid); 933 } 934 else 935 { 936 (void) setgid(ctladdr->q_gid); 937 (void) initgroups(ctladdr->q_ruser? 938 ctladdr->q_ruser: ctladdr->q_user, 939 ctladdr->q_gid); 940 (void) setuid(ctladdr->q_uid); 941 } 942 } 943 944 /* arrange for all the files to be closed */ 945 for (i = 3; i < DtableSize; i++) 946 { 947 register int j; 948 if ((j = fcntl(i, F_GETFD, 0)) != -1) 949 (void)fcntl(i, F_SETFD, j|1); 950 } 951 952 /* set up the mailer environment */ 953 i = 0; 954 env[i++] = "AGENT=sendmail"; 955 for (ep = environ; *ep != NULL; ep++) 956 { 957 if (strncmp(*ep, "TZ=", 3) == 0) 958 env[i++] = *ep; 959 } 960 env[i++] = NULL; 961 962 /* try to execute the mailer */ 963 execve(m->m_mailer, pvp, env); 964 saveerrno = errno; 965 syserr("Cannot exec %s", m->m_mailer); 966 if (m == LocalMailer) 967 _exit(EX_TEMPFAIL); 968 if (transienterror(saveerrno)) 969 _exit(EX_TEMPFAIL); 970 _exit(EX_UNAVAILABLE); 971 } 972 973 /* 974 ** Set up return value. 975 */ 976 977 mci = (MCI *) xalloc(sizeof *mci); 978 bzero((char *) mci, sizeof *mci); 979 mci->mci_mailer = m; 980 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 981 mci->mci_pid = pid; 982 (void) close(mpvect[0]); 983 mci->mci_out = fdopen(mpvect[1], "w"); 984 if (clever) 985 { 986 (void) close(rpvect[1]); 987 mci->mci_in = fdopen(rpvect[0], "r"); 988 } 989 else 990 { 991 mci->mci_flags |= MCIF_TEMP; 992 mci->mci_in = NULL; 993 } 994 } 995 996 /* 997 ** If we are in SMTP opening state, send initial protocol. 998 */ 999 1000 if (clever && mci->mci_state != MCIS_CLOSED) 1001 { 1002 smtpinit(m, mci, e); 1003 } 1004 if (tTd(11, 1)) 1005 { 1006 printf("openmailer: "); 1007 mci_dump(mci); 1008 } 1009 1010 return mci; 1011 } 1012 /* 1013 ** GIVERESPONSE -- Interpret an error response from a mailer 1014 ** 1015 ** Parameters: 1016 ** stat -- the status code from the mailer (high byte 1017 ** only; core dumps must have been taken care of 1018 ** already). 1019 ** m -- the mailer info for this mailer. 1020 ** mci -- the mailer connection info -- can be NULL if the 1021 ** response is given before the connection is made. 1022 ** e -- the current envelope. 1023 ** 1024 ** Returns: 1025 ** none. 1026 ** 1027 ** Side Effects: 1028 ** Errors may be incremented. 1029 ** ExitStat may be set. 1030 */ 1031 1032 giveresponse(stat, m, mci, e) 1033 int stat; 1034 register MAILER *m; 1035 register MCI *mci; 1036 ENVELOPE *e; 1037 { 1038 register char *statmsg; 1039 extern char *SysExMsg[]; 1040 register int i; 1041 extern int N_SysEx; 1042 #ifdef NAMED_BIND 1043 extern int h_errno; 1044 #endif 1045 char buf[MAXLINE]; 1046 extern char *errstring(); 1047 1048 /* 1049 ** Compute status message from code. 1050 */ 1051 1052 i = stat - EX__BASE; 1053 if (stat == 0) 1054 statmsg = "250 Sent"; 1055 else if (i < 0 || i > N_SysEx) 1056 { 1057 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1058 stat = EX_UNAVAILABLE; 1059 statmsg = buf; 1060 } 1061 else if (stat == EX_TEMPFAIL) 1062 { 1063 (void) strcpy(buf, SysExMsg[i] + 1); 1064 #ifdef NAMED_BIND 1065 if (h_errno == TRY_AGAIN) 1066 statmsg = errstring(h_errno+MAX_ERRNO); 1067 else 1068 #endif 1069 { 1070 if (errno != 0) 1071 statmsg = errstring(errno); 1072 else 1073 { 1074 #ifdef SMTP 1075 extern char SmtpError[]; 1076 1077 statmsg = SmtpError; 1078 #else /* SMTP */ 1079 statmsg = NULL; 1080 #endif /* SMTP */ 1081 } 1082 } 1083 if (statmsg != NULL && statmsg[0] != '\0') 1084 { 1085 (void) strcat(buf, ": "); 1086 (void) strcat(buf, statmsg); 1087 } 1088 statmsg = buf; 1089 } 1090 else 1091 { 1092 statmsg = SysExMsg[i]; 1093 if (*statmsg++ == ':') 1094 { 1095 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1096 statmsg = buf; 1097 } 1098 } 1099 1100 /* 1101 ** Print the message as appropriate 1102 */ 1103 1104 if (stat == EX_OK || stat == EX_TEMPFAIL) 1105 message(&statmsg[4], errstring(errno)); 1106 else 1107 { 1108 Errors++; 1109 usrerr(statmsg, errstring(errno)); 1110 } 1111 1112 /* 1113 ** Final cleanup. 1114 ** Log a record of the transaction. Compute the new 1115 ** ExitStat -- if we already had an error, stick with 1116 ** that. 1117 */ 1118 1119 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1120 logdelivery(m, mci, &statmsg[4], e); 1121 1122 if (stat != EX_TEMPFAIL) 1123 setstat(stat); 1124 if (stat != EX_OK) 1125 { 1126 if (e->e_message != NULL) 1127 free(e->e_message); 1128 e->e_message = newstr(&statmsg[4]); 1129 } 1130 errno = 0; 1131 #ifdef NAMED_BIND 1132 h_errno = 0; 1133 #endif 1134 } 1135 /* 1136 ** LOGDELIVERY -- log the delivery in the system log 1137 ** 1138 ** Parameters: 1139 ** m -- the mailer info. Can be NULL for initial queue. 1140 ** mci -- the mailer connection info -- can be NULL if the 1141 ** log is occuring when no connection is active. 1142 ** stat -- the message to print for the status. 1143 ** e -- the current envelope. 1144 ** 1145 ** Returns: 1146 ** none 1147 ** 1148 ** Side Effects: 1149 ** none 1150 */ 1151 1152 logdelivery(m, mci, stat, e) 1153 MAILER *m; 1154 register MCI *mci; 1155 char *stat; 1156 register ENVELOPE *e; 1157 { 1158 # ifdef LOG 1159 char *curhost; 1160 char buf[512]; 1161 extern char *pintvl(); 1162 extern char *macvalue(); 1163 1164 (void) sprintf(buf, "delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1165 1166 if (m != NULL) 1167 { 1168 (void) strcat(buf, ", mailer="); 1169 (void) strcat(buf, m->m_name); 1170 } 1171 1172 if (mci != NULL && mci->mci_host != NULL) 1173 { 1174 # ifdef DAEMON 1175 extern struct sockaddr_in CurHostAddr; 1176 extern char *inet_ntoa(); 1177 # endif 1178 1179 (void) strcat(buf, ", relay="); 1180 (void) strcat(buf, mci->mci_host); 1181 1182 # ifdef DAEMON 1183 (void) strcat(buf, " ("); 1184 (void) strcat(buf, inet_ntoa(CurHostAddr.sin_addr)); 1185 (void) strcat(buf, ")"); 1186 # endif 1187 } 1188 else 1189 { 1190 char *p = macvalue('h', e); 1191 1192 if (p != NULL && p[0] != '\0') 1193 { 1194 (void) strcat(buf, ", relay="); 1195 (void) strcat(buf, p); 1196 } 1197 } 1198 1199 syslog(LOG_INFO, "%s: to=%s, %s, stat=%s", 1200 e->e_id, e->e_to, buf, stat); 1201 # endif /* LOG */ 1202 } 1203 /* 1204 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1205 ** 1206 ** This can be made an arbitrary message separator by changing $l 1207 ** 1208 ** One of the ugliest hacks seen by human eyes is contained herein: 1209 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1210 ** does a well-meaning programmer such as myself have to deal with 1211 ** this kind of antique garbage???? 1212 ** 1213 ** Parameters: 1214 ** fp -- the file to output to. 1215 ** m -- the mailer describing this entry. 1216 ** 1217 ** Returns: 1218 ** none 1219 ** 1220 ** Side Effects: 1221 ** outputs some text to fp. 1222 */ 1223 1224 putfromline(fp, m, e) 1225 register FILE *fp; 1226 register MAILER *m; 1227 ENVELOPE *e; 1228 { 1229 char *template = "\201l\n"; 1230 char buf[MAXLINE]; 1231 1232 if (bitnset(M_NHDR, m->m_flags)) 1233 return; 1234 1235 # ifdef UGLYUUCP 1236 if (bitnset(M_UGLYUUCP, m->m_flags)) 1237 { 1238 char *bang; 1239 char xbuf[MAXLINE]; 1240 1241 expand("\201g", buf, &buf[sizeof buf - 1], e); 1242 bang = strchr(buf, '!'); 1243 if (bang == NULL) 1244 syserr("554 No ! in UUCP! (%s)", buf); 1245 else 1246 { 1247 *bang++ = '\0'; 1248 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1249 template = xbuf; 1250 } 1251 } 1252 # endif /* UGLYUUCP */ 1253 expand(template, buf, &buf[sizeof buf - 1], e); 1254 putline(buf, fp, m); 1255 } 1256 /* 1257 ** PUTBODY -- put the body of a message. 1258 ** 1259 ** Parameters: 1260 ** fp -- file to output onto. 1261 ** m -- a mailer descriptor to control output format. 1262 ** e -- the envelope to put out. 1263 ** 1264 ** Returns: 1265 ** none. 1266 ** 1267 ** Side Effects: 1268 ** The message is written onto fp. 1269 */ 1270 1271 putbody(fp, m, e) 1272 FILE *fp; 1273 MAILER *m; 1274 register ENVELOPE *e; 1275 { 1276 char buf[MAXLINE]; 1277 1278 /* 1279 ** Output the body of the message 1280 */ 1281 1282 if (e->e_dfp == NULL) 1283 { 1284 if (e->e_df != NULL) 1285 { 1286 e->e_dfp = fopen(e->e_df, "r"); 1287 if (e->e_dfp == NULL) 1288 syserr("putbody: Cannot open %s for %s from %s", 1289 e->e_df, e->e_to, e->e_from); 1290 } 1291 else 1292 putline("<<< No Message Collected >>>", fp, m); 1293 } 1294 if (e->e_dfp != NULL) 1295 { 1296 rewind(e->e_dfp); 1297 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 1298 { 1299 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 1300 strncmp(buf, "From ", 5) == 0) 1301 (void) putc('>', fp); 1302 putline(buf, fp, m); 1303 } 1304 1305 if (ferror(e->e_dfp)) 1306 { 1307 syserr("putbody: read error"); 1308 ExitStat = EX_IOERR; 1309 } 1310 } 1311 1312 (void) fflush(fp); 1313 if (ferror(fp) && errno != EPIPE) 1314 { 1315 syserr("putbody: write error"); 1316 ExitStat = EX_IOERR; 1317 } 1318 errno = 0; 1319 } 1320 /* 1321 ** MAILFILE -- Send a message to a file. 1322 ** 1323 ** If the file has the setuid/setgid bits set, but NO execute 1324 ** bits, sendmail will try to become the owner of that file 1325 ** rather than the real user. Obviously, this only works if 1326 ** sendmail runs as root. 1327 ** 1328 ** This could be done as a subordinate mailer, except that it 1329 ** is used implicitly to save messages in ~/dead.letter. We 1330 ** view this as being sufficiently important as to include it 1331 ** here. For example, if the system is dying, we shouldn't have 1332 ** to create another process plus some pipes to save the message. 1333 ** 1334 ** Parameters: 1335 ** filename -- the name of the file to send to. 1336 ** ctladdr -- the controlling address header -- includes 1337 ** the userid/groupid to be when sending. 1338 ** 1339 ** Returns: 1340 ** The exit code associated with the operation. 1341 ** 1342 ** Side Effects: 1343 ** none. 1344 */ 1345 1346 mailfile(filename, ctladdr, e) 1347 char *filename; 1348 ADDRESS *ctladdr; 1349 register ENVELOPE *e; 1350 { 1351 register FILE *f; 1352 register int pid; 1353 int mode; 1354 1355 /* 1356 ** Fork so we can change permissions here. 1357 ** Note that we MUST use fork, not vfork, because of 1358 ** the complications of calling subroutines, etc. 1359 */ 1360 1361 DOFORK(fork); 1362 1363 if (pid < 0) 1364 return (EX_OSERR); 1365 else if (pid == 0) 1366 { 1367 /* child -- actually write to file */ 1368 struct stat stb; 1369 1370 (void) signal(SIGINT, SIG_DFL); 1371 (void) signal(SIGHUP, SIG_DFL); 1372 (void) signal(SIGTERM, SIG_DFL); 1373 (void) umask(OldUmask); 1374 1375 if (stat(filename, &stb) < 0) 1376 stb.st_mode = 0666; 1377 mode = stb.st_mode; 1378 1379 /* limit the errors to those actually caused in the child */ 1380 errno = 0; 1381 ExitStat = EX_OK; 1382 1383 if (bitset(0111, stb.st_mode)) 1384 exit(EX_CANTCREAT); 1385 if (ctladdr == NULL) 1386 ctladdr = &e->e_from; 1387 else 1388 { 1389 /* ignore setuid and setgid bits */ 1390 mode &= ~(S_ISGID|S_ISUID); 1391 } 1392 1393 /* we have to open the dfile BEFORE setuid */ 1394 if (e->e_dfp == NULL && e->e_df != NULL) 1395 { 1396 e->e_dfp = fopen(e->e_df, "r"); 1397 if (e->e_dfp == NULL) 1398 { 1399 syserr("mailfile: Cannot open %s for %s from %s", 1400 e->e_df, e->e_to, e->e_from); 1401 } 1402 } 1403 1404 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 1405 { 1406 if (ctladdr->q_uid == 0) 1407 { 1408 (void) setgid(DefGid); 1409 (void) initgroups(DefUser, DefGid); 1410 } 1411 else 1412 { 1413 (void) setgid(ctladdr->q_gid); 1414 (void) initgroups(ctladdr->q_ruser ? 1415 ctladdr->q_ruser : ctladdr->q_user, 1416 ctladdr->q_gid); 1417 } 1418 } 1419 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 1420 { 1421 if (ctladdr->q_uid == 0) 1422 (void) setuid(DefUid); 1423 else 1424 (void) setuid(ctladdr->q_uid); 1425 } 1426 FileName = filename; 1427 LineNumber = 0; 1428 f = dfopen(filename, "a"); 1429 if (f == NULL) 1430 { 1431 message("554 cannot open"); 1432 exit(EX_CANTCREAT); 1433 } 1434 1435 putfromline(f, ProgMailer, e); 1436 (*e->e_puthdr)(f, ProgMailer, e); 1437 putline("\n", f, ProgMailer); 1438 (*e->e_putbody)(f, ProgMailer, e); 1439 putline("\n", f, ProgMailer); 1440 if (ferror(f)) 1441 { 1442 message("451 I/O error"); 1443 setstat(EX_IOERR); 1444 } 1445 (void) xfclose(f, "mailfile", filename); 1446 (void) fflush(stdout); 1447 1448 /* reset ISUID & ISGID bits for paranoid systems */ 1449 (void) chmod(filename, (int) stb.st_mode); 1450 exit(ExitStat); 1451 /*NOTREACHED*/ 1452 } 1453 else 1454 { 1455 /* parent -- wait for exit status */ 1456 int st; 1457 1458 st = waitfor(pid); 1459 if ((st & 0377) != 0) 1460 return (EX_UNAVAILABLE); 1461 else 1462 return ((st >> 8) & 0377); 1463 /*NOTREACHED*/ 1464 } 1465 } 1466 /* 1467 ** SENDALL -- actually send all the messages. 1468 ** 1469 ** Parameters: 1470 ** e -- the envelope to send. 1471 ** mode -- the delivery mode to use. If SM_DEFAULT, use 1472 ** the current SendMode. 1473 ** 1474 ** Returns: 1475 ** none. 1476 ** 1477 ** Side Effects: 1478 ** Scans the send lists and sends everything it finds. 1479 ** Delivers any appropriate error messages. 1480 ** If we are running in a non-interactive mode, takes the 1481 ** appropriate action. 1482 */ 1483 1484 sendall(e, mode) 1485 ENVELOPE *e; 1486 char mode; 1487 { 1488 register ADDRESS *q; 1489 char *owner; 1490 int otherowners; 1491 ENVELOPE *splitenv = NULL; 1492 1493 /* determine actual delivery mode */ 1494 if (mode == SM_DEFAULT) 1495 { 1496 extern bool shouldqueue(); 1497 1498 mode = SendMode; 1499 if (mode != SM_VERIFY && 1500 shouldqueue(e->e_msgpriority, e->e_ctime)) 1501 mode = SM_QUEUE; 1502 } 1503 1504 if (tTd(13, 1)) 1505 { 1506 printf("\nSENDALL: mode %c, e_from ", mode); 1507 printaddr(&e->e_from, FALSE); 1508 printf("sendqueue:\n"); 1509 printaddr(e->e_sendqueue, TRUE); 1510 } 1511 1512 /* 1513 ** Do any preprocessing necessary for the mode we are running. 1514 ** Check to make sure the hop count is reasonable. 1515 ** Delete sends to the sender in mailing lists. 1516 */ 1517 1518 CurEnv = e; 1519 1520 if (e->e_hopcount > MaxHopCount) 1521 { 1522 errno = 0; 1523 syserr("554 too many hops %d (%d max): from %s, to %s", 1524 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 1525 e->e_sendqueue->q_paddr); 1526 return; 1527 } 1528 1529 if (!MeToo) 1530 { 1531 extern ADDRESS *recipient(); 1532 1533 if (tTd(13, 5)) 1534 { 1535 printf("sendall: QDONTSEND "); 1536 printaddr(&e->e_from, FALSE); 1537 } 1538 e->e_from.q_flags |= QDONTSEND; 1539 (void) recipient(&e->e_from, &e->e_sendqueue, e); 1540 } 1541 1542 /* 1543 ** Handle alias owners. 1544 ** 1545 ** We scan up the q_alias chain looking for owners. 1546 ** We discard owners that are the same as the return path. 1547 */ 1548 1549 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1550 { 1551 register struct address *a; 1552 1553 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 1554 continue; 1555 if (a != NULL) 1556 q->q_owner = a->q_owner; 1557 1558 if (q->q_owner != NULL && 1559 !bitset(QDONTSEND, q->q_flags) && 1560 strcmp(q->q_owner, e->e_from.q_paddr) == 0) 1561 q->q_owner = NULL; 1562 } 1563 1564 owner = ""; 1565 otherowners = 1; 1566 while (owner != NULL && otherowners > 0) 1567 { 1568 owner = NULL; 1569 otherowners = 0; 1570 1571 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1572 { 1573 if (bitset(QDONTSEND, q->q_flags)) 1574 continue; 1575 1576 if (q->q_owner != NULL) 1577 { 1578 if (owner == NULL) 1579 owner = q->q_owner; 1580 else if (owner != q->q_owner) 1581 { 1582 if (strcmp(owner, q->q_owner) == 0) 1583 { 1584 /* make future comparisons cheap */ 1585 q->q_owner = owner; 1586 } 1587 else 1588 { 1589 otherowners++; 1590 } 1591 owner = q->q_owner; 1592 } 1593 } 1594 else 1595 { 1596 otherowners++; 1597 } 1598 } 1599 1600 if (owner != NULL && otherowners > 0) 1601 { 1602 register ENVELOPE *ee; 1603 extern HDR *copyheader(); 1604 extern ADDRESS *copyqueue(); 1605 1606 /* 1607 ** Split this envelope into two. 1608 */ 1609 1610 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 1611 *ee = *e; 1612 ee->e_id = NULL; 1613 (void) queuename(ee, '\0'); 1614 1615 if (tTd(13, 1)) 1616 printf("sendall: split %s into %s\n", 1617 e->e_id, ee->e_id); 1618 1619 ee->e_header = copyheader(e->e_header); 1620 ee->e_sendqueue = copyqueue(e->e_sendqueue); 1621 ee->e_errorqueue = copyqueue(e->e_errorqueue); 1622 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE); 1623 (void) parseaddr(owner, &ee->e_from, 1, '\0', NULL, ee); 1624 if (tTd(13, 5)) 1625 { 1626 printf("sendall(split): QDONTSEND "); 1627 printaddr(&ee->e_from, FALSE); 1628 } 1629 ee->e_from.q_flags |= QDONTSEND; 1630 ee->e_dfp = NULL; 1631 ee->e_xfp = NULL; 1632 ee->e_lockfp = NULL; 1633 ee->e_df = NULL; 1634 ee->e_sibling = splitenv; 1635 splitenv = ee; 1636 1637 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1638 if (q->q_owner == owner) 1639 q->q_flags |= QDONTSEND; 1640 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 1641 if (q->q_owner != owner) 1642 q->q_flags |= QDONTSEND; 1643 1644 if (e->e_df != NULL && mode != SM_VERIFY) 1645 { 1646 ee->e_dfp = NULL; 1647 ee->e_df = newstr(queuename(ee, 'd')); 1648 if (link(e->e_df, ee->e_df) < 0) 1649 { 1650 syserr("sendall: link(%s, %s)", 1651 e->e_df, ee->e_df); 1652 } 1653 } 1654 1655 if (mode != SM_VERIFY) 1656 { 1657 char xfbuf1[20], xfbuf2[20]; 1658 1659 (void) strcpy(xfbuf1, queuename(e, 'x')); 1660 (void) strcpy(xfbuf2, queuename(ee, 'x')); 1661 if (link(xfbuf1, xfbuf2) < 0) 1662 { 1663 syserr("sendall: link(%s, %s)", 1664 xfbuf1, xfbuf2); 1665 } 1666 } 1667 } 1668 } 1669 1670 if (owner != NULL) 1671 { 1672 (void) parseaddr(owner, &e->e_from, 1, '\0', NULL, e); 1673 if (tTd(13, 5)) 1674 { 1675 printf("sendall(owner): QDONTSEND "); 1676 printaddr(&e->e_from, FALSE); 1677 } 1678 e->e_from.q_flags |= QDONTSEND; 1679 } 1680 1681 # ifdef QUEUE 1682 if ((mode == SM_QUEUE || mode == SM_FORK || 1683 (mode != SM_VERIFY && SuperSafe)) && 1684 !bitset(EF_INQUEUE, e->e_flags)) 1685 queueup(e, TRUE, mode == SM_QUEUE); 1686 #endif /* QUEUE */ 1687 1688 if (splitenv != NULL) 1689 { 1690 register ENVELOPE *ee; 1691 1692 if (tTd(13, 1)) 1693 { 1694 printf("\nsendall: Split queue; remaining queue:\n"); 1695 printaddr(e->e_sendqueue, TRUE); 1696 } 1697 1698 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 1699 { 1700 CurEnv = ee; 1701 sendenvelope(ee, mode); 1702 } 1703 1704 CurEnv = e; 1705 } 1706 sendenvelope(e, mode); 1707 1708 for (; splitenv != NULL; splitenv = splitenv->e_sibling) 1709 dropenvelope(splitenv); 1710 } 1711 1712 sendenvelope(e, mode) 1713 register ENVELOPE *e; 1714 char mode; 1715 { 1716 bool oldverbose; 1717 int pid; 1718 register ADDRESS *q; 1719 #ifdef LOCKF 1720 struct flock lfd; 1721 #endif 1722 1723 oldverbose = Verbose; 1724 switch (mode) 1725 { 1726 case SM_VERIFY: 1727 Verbose = TRUE; 1728 break; 1729 1730 case SM_QUEUE: 1731 queueonly: 1732 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 1733 return; 1734 1735 case SM_FORK: 1736 if (e->e_xfp != NULL) 1737 (void) fflush(e->e_xfp); 1738 1739 # ifdef LOCKF 1740 /* 1741 ** Since lockf has the interesting semantic that the 1742 ** lock is lost when we fork, we have to risk losing 1743 ** the lock here by closing before the fork, and then 1744 ** trying to get it back in the child. 1745 */ 1746 1747 if (e->e_lockfp != NULL) 1748 { 1749 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 1750 e->e_lockfp = NULL; 1751 } 1752 # endif /* LOCKF */ 1753 1754 pid = fork(); 1755 if (pid < 0) 1756 { 1757 goto queueonly; 1758 } 1759 else if (pid > 0) 1760 { 1761 /* be sure we leave the temp files to our child */ 1762 e->e_id = e->e_df = NULL; 1763 # ifndef LOCKF 1764 if (e->e_lockfp != NULL) 1765 { 1766 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 1767 e->e_lockfp = NULL; 1768 } 1769 # endif 1770 1771 /* close any random open files in the envelope */ 1772 if (e->e_dfp != NULL) 1773 { 1774 (void) xfclose(e->e_dfp, "sendenvelope", "dfp"); 1775 e->e_dfp = NULL; 1776 } 1777 if (e->e_xfp != NULL) 1778 { 1779 (void) xfclose(e->e_xfp, "sendenvelope", "xfp"); 1780 e->e_xfp = NULL; 1781 } 1782 return; 1783 } 1784 1785 /* double fork to avoid zombies */ 1786 if (fork() > 0) 1787 exit(EX_OK); 1788 1789 /* be sure we are immune from the terminal */ 1790 disconnect(FALSE, e); 1791 1792 # ifdef LOCKF 1793 /* 1794 ** Now try to get our lock back. 1795 */ 1796 1797 lfd.l_type = F_WRLCK; 1798 lfd.l_whence = lfd.l_start = lfd.l_len = 0; 1799 e->e_lockfp = fopen(queuename(e, 'q'), "r+"); 1800 if (e->e_lockfp == NULL || 1801 fcntl(fileno(e->e_lockfp), F_SETLK, &lfd) < 0) 1802 { 1803 /* oops.... lost it */ 1804 # ifdef LOG 1805 if (LogLevel > 29) 1806 syslog(LOG_NOTICE, "%s: lost lock: %m", 1807 e->e_id); 1808 # endif /* LOG */ 1809 exit(EX_OK); 1810 } 1811 # endif /* LOCKF */ 1812 1813 /* 1814 ** Close any cached connections. 1815 ** 1816 ** We don't send the QUIT protocol because the parent 1817 ** still knows about the connection. 1818 ** 1819 ** This should only happen when delivering an error 1820 ** message. 1821 */ 1822 1823 mci_flush(FALSE, NULL); 1824 1825 break; 1826 } 1827 1828 /* 1829 ** Run through the list and send everything. 1830 */ 1831 1832 e->e_nsent = 0; 1833 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1834 { 1835 if (mode == SM_VERIFY) 1836 { 1837 e->e_to = q->q_paddr; 1838 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1839 message("deliverable"); 1840 } 1841 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1842 { 1843 # ifdef QUEUE 1844 /* 1845 ** Checkpoint the send list every few addresses 1846 */ 1847 1848 if (e->e_nsent >= CheckpointInterval) 1849 { 1850 queueup(e, TRUE, FALSE); 1851 e->e_nsent = 0; 1852 } 1853 # endif /* QUEUE */ 1854 (void) deliver(e, q); 1855 } 1856 } 1857 Verbose = oldverbose; 1858 1859 /* 1860 ** Now run through and check for errors. 1861 */ 1862 1863 if (mode == SM_VERIFY) 1864 { 1865 return; 1866 } 1867 1868 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 1869 { 1870 if (tTd(13, 3)) 1871 { 1872 printf("Checking "); 1873 printaddr(q, FALSE); 1874 } 1875 1876 /* only send errors if the message failed */ 1877 if (!bitset(QBADADDR, q->q_flags)) 1878 continue; 1879 1880 e->e_flags |= EF_FATALERRS; 1881 1882 if (q->q_owner == NULL && strcmp(e->e_from.q_paddr, "<>") != 0) 1883 (void) sendtolist(e->e_from.q_paddr, NULL, 1884 &e->e_errorqueue, e); 1885 } 1886 1887 if (mode == SM_FORK) 1888 finis(); 1889 } 1890 /* 1891 ** HOSTSIGNATURE -- return the "signature" for a host. 1892 ** 1893 ** The signature describes how we are going to send this -- it 1894 ** can be just the hostname (for non-Internet hosts) or can be 1895 ** an ordered list of MX hosts. 1896 ** 1897 ** Parameters: 1898 ** m -- the mailer describing this host. 1899 ** host -- the host name. 1900 ** e -- the current envelope. 1901 ** 1902 ** Returns: 1903 ** The signature for this host. 1904 ** 1905 ** Side Effects: 1906 ** Can tweak the symbol table. 1907 */ 1908 1909 char * 1910 hostsignature(m, host, e) 1911 register MAILER *m; 1912 char *host; 1913 ENVELOPE *e; 1914 { 1915 register char *p; 1916 register STAB *s; 1917 int i; 1918 int len; 1919 #ifdef NAMED_BIND 1920 int nmx; 1921 auto int rcode; 1922 char *mxhosts[MAXMXHOSTS + 1]; 1923 static char myhostbuf[MAXNAME]; 1924 #endif 1925 1926 /* 1927 ** Check to see if this uses IPC -- if not, it can't have MX records. 1928 */ 1929 1930 p = m->m_mailer; 1931 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 1932 { 1933 /* just an ordinary mailer */ 1934 return host; 1935 } 1936 1937 /* 1938 ** If it is a numeric address, just return it. 1939 */ 1940 1941 if (host[0] == '[') 1942 return host; 1943 1944 /* 1945 ** Look it up in the symbol table. 1946 */ 1947 1948 s = stab(host, ST_HOSTSIG, ST_ENTER); 1949 if (s->s_hostsig != NULL) 1950 return s->s_hostsig; 1951 1952 /* 1953 ** Not already there -- create a signature. 1954 */ 1955 1956 #ifdef NAMED_BIND 1957 if (myhostbuf[0] == '\0') 1958 expand("\201j", myhostbuf, &myhostbuf[sizeof myhostbuf - 1], e); 1959 1960 nmx = getmxrr(host, mxhosts, myhostbuf, &rcode); 1961 1962 if (nmx <= 0) 1963 { 1964 register MCI *mci; 1965 extern int errno; 1966 extern MCI *mci_get(); 1967 1968 /* update the connection info for this host */ 1969 mci = mci_get(host, m); 1970 mci->mci_exitstat = rcode; 1971 mci->mci_errno = errno; 1972 1973 /* and return the original host name as the signature */ 1974 s->s_hostsig = host; 1975 return host; 1976 } 1977 1978 len = 0; 1979 for (i = 0; i < nmx; i++) 1980 { 1981 len += strlen(mxhosts[i]) + 1; 1982 } 1983 s->s_hostsig = p = xalloc(len); 1984 for (i = 0; i < nmx; i++) 1985 { 1986 if (i != 0) 1987 *p++ = ':'; 1988 strcpy(p, mxhosts[i]); 1989 p += strlen(p); 1990 } 1991 makelower(s->s_hostsig); 1992 #else 1993 /* not using BIND -- the signature is just the host name */ 1994 s->s_hostsig = host; 1995 #endif 1996 if (tTd(17, 1)) 1997 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 1998 return s->s_hostsig; 1999 } 2000