1 /* 2 * Copyright (c) 1983 Eric P. Allman 3 * Copyright (c) 1988, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)deliver.c 8.53 (Berkeley) 12/10/93"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 #include <netdb.h> 15 #include <errno.h> 16 #ifdef NAMED_BIND 17 #include <arpa/nameser.h> 18 #include <resolv.h> 19 20 extern int h_errno; 21 #endif 22 23 extern char SmtpError[]; 24 25 /* 26 ** SENDALL -- actually send all the messages. 27 ** 28 ** Parameters: 29 ** e -- the envelope to send. 30 ** mode -- the delivery mode to use. If SM_DEFAULT, use 31 ** the current e->e_sendmode. 32 ** 33 ** Returns: 34 ** none. 35 ** 36 ** Side Effects: 37 ** Scans the send lists and sends everything it finds. 38 ** Delivers any appropriate error messages. 39 ** If we are running in a non-interactive mode, takes the 40 ** appropriate action. 41 */ 42 43 sendall(e, mode) 44 ENVELOPE *e; 45 char mode; 46 { 47 register ADDRESS *q; 48 char *owner; 49 int otherowners; 50 register ENVELOPE *ee; 51 ENVELOPE *splitenv = NULL; 52 bool announcequeueup; 53 54 /* 55 ** If we have had global, fatal errors, don't bother sending 56 ** the message at all if we are in SMTP mode. Local errors 57 ** (e.g., a single address failing) will still cause the other 58 ** addresses to be sent. 59 */ 60 61 if (bitset(EF_FATALERRS, e->e_flags) && OpMode == MD_SMTP) 62 { 63 e->e_flags |= EF_CLRQUEUE; 64 return; 65 } 66 67 /* determine actual delivery mode */ 68 CurrentLA = getla(); 69 if (mode == SM_DEFAULT) 70 { 71 mode = e->e_sendmode; 72 if (mode != SM_VERIFY && 73 shouldqueue(e->e_msgpriority, e->e_ctime)) 74 mode = SM_QUEUE; 75 announcequeueup = mode == SM_QUEUE; 76 } 77 else 78 announcequeueup = FALSE; 79 80 if (tTd(13, 1)) 81 { 82 printf("\n===== SENDALL: mode %c, id %s, e_from ", 83 mode, e->e_id); 84 printaddr(&e->e_from, FALSE); 85 printf("sendqueue:\n"); 86 printaddr(e->e_sendqueue, TRUE); 87 } 88 89 /* 90 ** Do any preprocessing necessary for the mode we are running. 91 ** Check to make sure the hop count is reasonable. 92 ** Delete sends to the sender in mailing lists. 93 */ 94 95 CurEnv = e; 96 97 if (e->e_hopcount > MaxHopCount) 98 { 99 errno = 0; 100 syserr("554 too many hops %d (%d max): from %s via %s, to %s", 101 e->e_hopcount, MaxHopCount, e->e_from.q_paddr, 102 RealHostName, e->e_sendqueue->q_paddr); 103 return; 104 } 105 106 /* 107 ** Do sender deletion. 108 ** 109 ** If the sender has the QQUEUEUP flag set, skip this. 110 ** This can happen if the name server is hosed when you 111 ** are trying to send mail. The result is that the sender 112 ** is instantiated in the queue as a recipient. 113 */ 114 115 if (!bitset(EF_METOO, e->e_flags) && 116 !bitset(QQUEUEUP, e->e_from.q_flags)) 117 { 118 if (tTd(13, 5)) 119 { 120 printf("sendall: QDONTSEND "); 121 printaddr(&e->e_from, FALSE); 122 } 123 e->e_from.q_flags |= QDONTSEND; 124 (void) recipient(&e->e_from, &e->e_sendqueue, e); 125 } 126 127 /* 128 ** Handle alias owners. 129 ** 130 ** We scan up the q_alias chain looking for owners. 131 ** We discard owners that are the same as the return path. 132 */ 133 134 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 135 { 136 register struct address *a; 137 138 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias) 139 continue; 140 if (a != NULL) 141 q->q_owner = a->q_owner; 142 143 if (q->q_owner != NULL && 144 !bitset(QDONTSEND, q->q_flags) && 145 strcmp(q->q_owner, e->e_from.q_paddr) == 0) 146 q->q_owner = NULL; 147 } 148 149 owner = ""; 150 otherowners = 1; 151 while (owner != NULL && otherowners > 0) 152 { 153 owner = NULL; 154 otherowners = 0; 155 156 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 157 { 158 if (bitset(QDONTSEND, q->q_flags)) 159 continue; 160 161 if (q->q_owner != NULL) 162 { 163 if (owner == NULL) 164 owner = q->q_owner; 165 else if (owner != q->q_owner) 166 { 167 if (strcmp(owner, q->q_owner) == 0) 168 { 169 /* make future comparisons cheap */ 170 q->q_owner = owner; 171 } 172 else 173 { 174 otherowners++; 175 } 176 owner = q->q_owner; 177 } 178 } 179 else 180 { 181 otherowners++; 182 } 183 } 184 185 if (owner != NULL && otherowners > 0) 186 { 187 extern HDR *copyheader(); 188 extern ADDRESS *copyqueue(); 189 190 /* 191 ** Split this envelope into two. 192 */ 193 194 ee = (ENVELOPE *) xalloc(sizeof(ENVELOPE)); 195 *ee = *e; 196 ee->e_id = NULL; 197 (void) queuename(ee, '\0'); 198 199 if (tTd(13, 1)) 200 printf("sendall: split %s into %s\n", 201 e->e_id, ee->e_id); 202 203 ee->e_header = copyheader(e->e_header); 204 ee->e_sendqueue = copyqueue(e->e_sendqueue); 205 ee->e_errorqueue = copyqueue(e->e_errorqueue); 206 ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS); 207 setsender(owner, ee, NULL, TRUE); 208 if (tTd(13, 5)) 209 { 210 printf("sendall(split): QDONTSEND "); 211 printaddr(&ee->e_from, FALSE); 212 } 213 ee->e_from.q_flags |= QDONTSEND; 214 ee->e_dfp = NULL; 215 ee->e_xfp = NULL; 216 ee->e_df = NULL; 217 ee->e_errormode = EM_MAIL; 218 ee->e_sibling = splitenv; 219 splitenv = ee; 220 221 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 222 if (q->q_owner == owner) 223 q->q_flags |= QDONTSEND; 224 for (q = ee->e_sendqueue; q != NULL; q = q->q_next) 225 if (q->q_owner != owner) 226 q->q_flags |= QDONTSEND; 227 228 if (e->e_df != NULL && mode != SM_VERIFY) 229 { 230 ee->e_dfp = NULL; 231 ee->e_df = queuename(ee, 'd'); 232 ee->e_df = newstr(ee->e_df); 233 if (link(e->e_df, ee->e_df) < 0) 234 { 235 syserr("sendall: link(%s, %s)", 236 e->e_df, ee->e_df); 237 } 238 } 239 240 if (mode != SM_VERIFY) 241 openxscript(ee); 242 #ifdef LOG 243 if (LogLevel > 4) 244 syslog(LOG_INFO, "%s: clone %s", 245 ee->e_id, e->e_id); 246 #endif 247 } 248 } 249 250 if (owner != NULL) 251 { 252 setsender(owner, e, NULL, TRUE); 253 if (tTd(13, 5)) 254 { 255 printf("sendall(owner): QDONTSEND "); 256 printaddr(&e->e_from, FALSE); 257 } 258 e->e_from.q_flags |= QDONTSEND; 259 e->e_errormode = EM_MAIL; 260 } 261 262 # ifdef QUEUE 263 if ((mode == SM_QUEUE || mode == SM_FORK || 264 (mode != SM_VERIFY && SuperSafe)) && 265 !bitset(EF_INQUEUE, e->e_flags)) 266 { 267 /* be sure everything is instantiated in the queue */ 268 queueup(e, TRUE, announcequeueup); 269 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 270 queueup(ee, TRUE, announcequeueup); 271 } 272 #endif /* QUEUE */ 273 274 if (splitenv != NULL) 275 { 276 if (tTd(13, 1)) 277 { 278 printf("\nsendall: Split queue; remaining queue:\n"); 279 printaddr(e->e_sendqueue, TRUE); 280 } 281 282 for (ee = splitenv; ee != NULL; ee = ee->e_sibling) 283 { 284 CurEnv = ee; 285 sendenvelope(ee, mode); 286 } 287 288 CurEnv = e; 289 } 290 sendenvelope(e, mode); 291 292 for (; splitenv != NULL; splitenv = splitenv->e_sibling) 293 dropenvelope(splitenv); 294 } 295 296 sendenvelope(e, mode) 297 register ENVELOPE *e; 298 char mode; 299 { 300 bool oldverbose; 301 int pid; 302 register ADDRESS *q; 303 char *qf; 304 char *id; 305 306 /* 307 ** If we have had global, fatal errors, don't bother sending 308 ** the message at all if we are in SMTP mode. Local errors 309 ** (e.g., a single address failing) will still cause the other 310 ** addresses to be sent. 311 */ 312 313 if (bitset(EF_FATALERRS, e->e_flags) && OpMode == MD_SMTP) 314 { 315 e->e_flags |= EF_CLRQUEUE; 316 return; 317 } 318 319 oldverbose = Verbose; 320 switch (mode) 321 { 322 case SM_VERIFY: 323 Verbose = TRUE; 324 break; 325 326 case SM_QUEUE: 327 queueonly: 328 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 329 return; 330 331 case SM_FORK: 332 if (e->e_xfp != NULL) 333 (void) fflush(e->e_xfp); 334 335 # ifndef HASFLOCK 336 /* 337 ** Since fcntl locking has the interesting semantic that 338 ** the lock is owned by a process, not by an open file 339 ** descriptor, we have to flush this to the queue, and 340 ** then restart from scratch in the child. 341 */ 342 343 /* save id for future use */ 344 id = e->e_id; 345 346 /* now drop the envelope in the parent */ 347 e->e_flags |= EF_INQUEUE|EF_KEEPQUEUE; 348 dropenvelope(e); 349 350 /* and reacquire in the child */ 351 (void) dowork(id, TRUE, FALSE, e); 352 353 return; 354 355 # else /* HASFLOCK */ 356 357 pid = fork(); 358 if (pid < 0) 359 { 360 goto queueonly; 361 } 362 else if (pid > 0) 363 { 364 /* be sure we leave the temp files to our child */ 365 /* can't call unlockqueue to avoid unlink of xfp */ 366 if (e->e_lockfp != NULL) 367 (void) xfclose(e->e_lockfp, "sendenvelope", "lockfp"); 368 e->e_lockfp = NULL; 369 370 /* close any random open files in the envelope */ 371 closexscript(e); 372 if (e->e_dfp != NULL) 373 (void) xfclose(e->e_dfp, "sendenvelope", e->e_df); 374 e->e_dfp = NULL; 375 e->e_id = e->e_df = NULL; 376 return; 377 } 378 379 /* double fork to avoid zombies */ 380 if (fork() > 0) 381 exit(EX_OK); 382 383 /* be sure we are immune from the terminal */ 384 disconnect(1, e); 385 386 /* 387 ** Close any cached connections. 388 ** 389 ** We don't send the QUIT protocol because the parent 390 ** still knows about the connection. 391 ** 392 ** This should only happen when delivering an error 393 ** message. 394 */ 395 396 mci_flush(FALSE, NULL); 397 398 # endif /* HASFLOCK */ 399 400 break; 401 } 402 403 /* 404 ** Run through the list and send everything. 405 ** 406 ** Set EF_GLOBALERRS so that error messages during delivery 407 ** result in returned mail. 408 */ 409 410 e->e_nsent = 0; 411 e->e_flags |= EF_GLOBALERRS; 412 413 /* now run through the queue */ 414 for (q = e->e_sendqueue; q != NULL; q = q->q_next) 415 { 416 #ifdef XDEBUG 417 char wbuf[MAXNAME + 20]; 418 419 (void) sprintf(wbuf, "sendall(%s)", q->q_paddr); 420 checkfd012(wbuf); 421 #endif 422 if (mode == SM_VERIFY) 423 { 424 e->e_to = q->q_paddr; 425 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 426 { 427 if (q->q_host != NULL && q->q_host[0] != '\0') 428 message("deliverable: mailer %s, host %s, user %s", 429 q->q_mailer->m_name, 430 q->q_host, 431 q->q_user); 432 else 433 message("deliverable: mailer %s, user %s", 434 q->q_mailer->m_name, 435 q->q_user); 436 } 437 } 438 else if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 439 { 440 # ifdef QUEUE 441 /* 442 ** Checkpoint the send list every few addresses 443 */ 444 445 if (e->e_nsent >= CheckpointInterval) 446 { 447 queueup(e, TRUE, FALSE); 448 e->e_nsent = 0; 449 } 450 # endif /* QUEUE */ 451 (void) deliver(e, q); 452 } 453 } 454 Verbose = oldverbose; 455 456 #ifdef XDEBUG 457 checkfd012("end of sendenvelope"); 458 #endif 459 460 if (mode == SM_FORK) 461 finis(); 462 } 463 /* 464 ** DOFORK -- do a fork, retrying a couple of times on failure. 465 ** 466 ** This MUST be a macro, since after a vfork we are running 467 ** two processes on the same stack!!! 468 ** 469 ** Parameters: 470 ** none. 471 ** 472 ** Returns: 473 ** From a macro??? You've got to be kidding! 474 ** 475 ** Side Effects: 476 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 477 ** pid of child in parent, zero in child. 478 ** -1 on unrecoverable error. 479 ** 480 ** Notes: 481 ** I'm awfully sorry this looks so awful. That's 482 ** vfork for you..... 483 */ 484 485 # define NFORKTRIES 5 486 487 # ifndef FORK 488 # define FORK fork 489 # endif 490 491 # define DOFORK(fORKfN) \ 492 {\ 493 register int i;\ 494 \ 495 for (i = NFORKTRIES; --i >= 0; )\ 496 {\ 497 pid = fORKfN();\ 498 if (pid >= 0)\ 499 break;\ 500 if (i > 0)\ 501 sleep((unsigned) NFORKTRIES - i);\ 502 }\ 503 } 504 /* 505 ** DOFORK -- simple fork interface to DOFORK. 506 ** 507 ** Parameters: 508 ** none. 509 ** 510 ** Returns: 511 ** pid of child in parent. 512 ** zero in child. 513 ** -1 on error. 514 ** 515 ** Side Effects: 516 ** returns twice, once in parent and once in child. 517 */ 518 519 dofork() 520 { 521 register int pid; 522 523 DOFORK(fork); 524 return (pid); 525 } 526 /* 527 ** DELIVER -- Deliver a message to a list of addresses. 528 ** 529 ** This routine delivers to everyone on the same host as the 530 ** user on the head of the list. It is clever about mailers 531 ** that don't handle multiple users. It is NOT guaranteed 532 ** that it will deliver to all these addresses however -- so 533 ** deliver should be called once for each address on the 534 ** list. 535 ** 536 ** Parameters: 537 ** e -- the envelope to deliver. 538 ** firstto -- head of the address list to deliver to. 539 ** 540 ** Returns: 541 ** zero -- successfully delivered. 542 ** else -- some failure, see ExitStat for more info. 543 ** 544 ** Side Effects: 545 ** The standard input is passed off to someone. 546 */ 547 548 deliver(e, firstto) 549 register ENVELOPE *e; 550 ADDRESS *firstto; 551 { 552 char *host; /* host being sent to */ 553 char *user; /* user being sent to */ 554 char **pvp; 555 register char **mvp; 556 register char *p; 557 register MAILER *m; /* mailer for this recipient */ 558 ADDRESS *ctladdr; 559 register MCI *mci; 560 register ADDRESS *to = firstto; 561 bool clever = FALSE; /* running user smtp to this mailer */ 562 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 563 int rcode; /* response code */ 564 char *firstsig; /* signature of firstto */ 565 int pid; 566 char *curhost; 567 int mpvect[2]; 568 int rpvect[2]; 569 char *pv[MAXPV+1]; 570 char tobuf[TOBUFSIZE]; /* text line of to people */ 571 char buf[MAXNAME]; 572 char rpathbuf[MAXNAME]; /* translated return path */ 573 extern int checkcompat(); 574 575 errno = 0; 576 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags)) 577 return (0); 578 579 #ifdef NAMED_BIND 580 /* unless interactive, try twice, over a minute */ 581 if (OpMode == MD_DAEMON || OpMode == MD_SMTP) { 582 _res.retrans = 30; 583 _res.retry = 2; 584 } 585 #endif 586 587 m = to->q_mailer; 588 host = to->q_host; 589 CurEnv = e; /* just in case */ 590 e->e_statmsg = NULL; 591 SmtpError[0] = '\0'; 592 593 if (tTd(10, 1)) 594 printf("\n--deliver, mailer=%d, host=`%s', first user=`%s'\n", 595 m->m_mno, host, to->q_user); 596 if (tTd(10, 100)) 597 printopenfds(FALSE); 598 599 /* 600 ** If this mailer is expensive, and if we don't want to make 601 ** connections now, just mark these addresses and return. 602 ** This is useful if we want to batch connections to 603 ** reduce load. This will cause the messages to be 604 ** queued up, and a daemon will come along to send the 605 ** messages later. 606 ** This should be on a per-mailer basis. 607 */ 608 609 if (NoConnect && bitnset(M_EXPENSIVE, m->m_flags) && !Verbose) 610 { 611 for (; to != NULL; to = to->q_next) 612 { 613 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 614 to->q_mailer != m) 615 continue; 616 to->q_flags |= QQUEUEUP; 617 e->e_to = to->q_paddr; 618 message("queued"); 619 if (LogLevel > 8) 620 logdelivery(m, NULL, "queued", NULL, e); 621 } 622 e->e_to = NULL; 623 return (0); 624 } 625 626 /* 627 ** Do initial argv setup. 628 ** Insert the mailer name. Notice that $x expansion is 629 ** NOT done on the mailer name. Then, if the mailer has 630 ** a picky -f flag, we insert it as appropriate. This 631 ** code does not check for 'pv' overflow; this places a 632 ** manifest lower limit of 4 for MAXPV. 633 ** The from address rewrite is expected to make 634 ** the address relative to the other end. 635 */ 636 637 /* rewrite from address, using rewriting rules */ 638 rcode = EX_OK; 639 (void) strcpy(rpathbuf, remotename(e->e_from.q_paddr, m, 640 RF_SENDERADDR|RF_CANONICAL, 641 &rcode, e)); 642 define('g', rpathbuf, e); /* translated return path */ 643 define('h', host, e); /* to host */ 644 Errors = 0; 645 pvp = pv; 646 *pvp++ = m->m_argv[0]; 647 648 /* insert -f or -r flag as appropriate */ 649 if (FromFlag && (bitnset(M_FOPT, m->m_flags) || bitnset(M_ROPT, m->m_flags))) 650 { 651 if (bitnset(M_FOPT, m->m_flags)) 652 *pvp++ = "-f"; 653 else 654 *pvp++ = "-r"; 655 *pvp++ = newstr(rpathbuf); 656 } 657 658 /* 659 ** Append the other fixed parts of the argv. These run 660 ** up to the first entry containing "$u". There can only 661 ** be one of these, and there are only a few more slots 662 ** in the pv after it. 663 */ 664 665 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 666 { 667 /* can't use strchr here because of sign extension problems */ 668 while (*p != '\0') 669 { 670 if ((*p++ & 0377) == MACROEXPAND) 671 { 672 if (*p == 'u') 673 break; 674 } 675 } 676 677 if (*p != '\0') 678 break; 679 680 /* this entry is safe -- go ahead and process it */ 681 expand(*mvp, buf, &buf[sizeof buf - 1], e); 682 *pvp++ = newstr(buf); 683 if (pvp >= &pv[MAXPV - 3]) 684 { 685 syserr("554 Too many parameters to %s before $u", pv[0]); 686 return (-1); 687 } 688 } 689 690 /* 691 ** If we have no substitution for the user name in the argument 692 ** list, we know that we must supply the names otherwise -- and 693 ** SMTP is the answer!! 694 */ 695 696 if (*mvp == NULL) 697 { 698 /* running SMTP */ 699 # ifdef SMTP 700 clever = TRUE; 701 *pvp = NULL; 702 # else /* SMTP */ 703 /* oops! we don't implement SMTP */ 704 syserr("554 SMTP style mailer not implemented"); 705 return (EX_SOFTWARE); 706 # endif /* SMTP */ 707 } 708 709 /* 710 ** At this point *mvp points to the argument with $u. We 711 ** run through our address list and append all the addresses 712 ** we can. If we run out of space, do not fret! We can 713 ** always send another copy later. 714 */ 715 716 tobuf[0] = '\0'; 717 e->e_to = tobuf; 718 ctladdr = NULL; 719 firstsig = hostsignature(firstto->q_mailer, firstto->q_host, e); 720 for (; to != NULL; to = to->q_next) 721 { 722 /* avoid sending multiple recipients to dumb mailers */ 723 if (tobuf[0] != '\0' && !bitnset(M_MUSER, m->m_flags)) 724 break; 725 726 /* if already sent or not for this host, don't send */ 727 if (bitset(QDONTSEND|QBADADDR|QQUEUEUP, to->q_flags) || 728 to->q_mailer != firstto->q_mailer || 729 strcmp(hostsignature(to->q_mailer, to->q_host, e), firstsig) != 0) 730 continue; 731 732 /* avoid overflowing tobuf */ 733 if (sizeof tobuf < (strlen(to->q_paddr) + strlen(tobuf) + 2)) 734 break; 735 736 if (tTd(10, 1)) 737 { 738 printf("\nsend to "); 739 printaddr(to, FALSE); 740 } 741 742 /* compute effective uid/gid when sending */ 743 ctladdr = getctladdr(to); 744 745 user = to->q_user; 746 e->e_to = to->q_paddr; 747 if (tTd(10, 5)) 748 { 749 printf("deliver: QDONTSEND "); 750 printaddr(to, FALSE); 751 } 752 to->q_flags |= QDONTSEND; 753 754 /* 755 ** Check to see that these people are allowed to 756 ** talk to each other. 757 */ 758 759 if (m->m_maxsize != 0 && e->e_msgsize > m->m_maxsize) 760 { 761 NoReturn = TRUE; 762 usrerr("552 Message is too large; %ld bytes max", m->m_maxsize); 763 giveresponse(EX_UNAVAILABLE, m, NULL, ctladdr, e); 764 continue; 765 } 766 rcode = checkcompat(to, e); 767 if (rcode != EX_OK) 768 { 769 markfailure(e, to, rcode); 770 giveresponse(rcode, m, NULL, ctladdr, e); 771 continue; 772 } 773 774 /* 775 ** Strip quote bits from names if the mailer is dumb 776 ** about them. 777 */ 778 779 if (bitnset(M_STRIPQ, m->m_flags)) 780 { 781 stripquotes(user); 782 stripquotes(host); 783 } 784 785 /* hack attack -- delivermail compatibility */ 786 if (m == ProgMailer && *user == '|') 787 user++; 788 789 /* 790 ** If an error message has already been given, don't 791 ** bother to send to this address. 792 ** 793 ** >>>>>>>>>> This clause assumes that the local mailer 794 ** >> NOTE >> cannot do any further aliasing; that 795 ** >>>>>>>>>> function is subsumed by sendmail. 796 */ 797 798 if (bitset(QBADADDR|QQUEUEUP, to->q_flags)) 799 continue; 800 801 /* save statistics.... */ 802 markstats(e, to); 803 804 /* 805 ** See if this user name is "special". 806 ** If the user name has a slash in it, assume that this 807 ** is a file -- send it off without further ado. Note 808 ** that this type of addresses is not processed along 809 ** with the others, so we fudge on the To person. 810 */ 811 812 if (m == FileMailer) 813 { 814 rcode = mailfile(user, ctladdr, e); 815 giveresponse(rcode, m, NULL, ctladdr, e); 816 if (rcode == EX_OK) 817 to->q_flags |= QSENT; 818 continue; 819 } 820 821 /* 822 ** Address is verified -- add this user to mailer 823 ** argv, and add it to the print list of recipients. 824 */ 825 826 /* link together the chain of recipients */ 827 to->q_tchain = tochain; 828 tochain = to; 829 830 /* create list of users for error messages */ 831 (void) strcat(tobuf, ","); 832 (void) strcat(tobuf, to->q_paddr); 833 define('u', user, e); /* to user */ 834 p = to->q_home; 835 if (p == NULL && ctladdr != NULL) 836 p = ctladdr->q_home; 837 define('z', p, e); /* user's home */ 838 839 /* 840 ** Expand out this user into argument list. 841 */ 842 843 if (!clever) 844 { 845 expand(*mvp, buf, &buf[sizeof buf - 1], e); 846 *pvp++ = newstr(buf); 847 if (pvp >= &pv[MAXPV - 2]) 848 { 849 /* allow some space for trailing parms */ 850 break; 851 } 852 } 853 } 854 855 /* see if any addresses still exist */ 856 if (tobuf[0] == '\0') 857 { 858 define('g', (char *) NULL, e); 859 return (0); 860 } 861 862 /* print out messages as full list */ 863 e->e_to = tobuf + 1; 864 865 /* 866 ** Fill out any parameters after the $u parameter. 867 */ 868 869 while (!clever && *++mvp != NULL) 870 { 871 expand(*mvp, buf, &buf[sizeof buf - 1], e); 872 *pvp++ = newstr(buf); 873 if (pvp >= &pv[MAXPV]) 874 syserr("554 deliver: pv overflow after $u for %s", pv[0]); 875 } 876 *pvp++ = NULL; 877 878 /* 879 ** Call the mailer. 880 ** The argument vector gets built, pipes 881 ** are created as necessary, and we fork & exec as 882 ** appropriate. 883 ** If we are running SMTP, we just need to clean up. 884 */ 885 886 #ifdef NAMED_BIND 887 if (ConfigLevel < 2) 888 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 889 #endif 890 891 if (tTd(11, 1)) 892 { 893 printf("openmailer:"); 894 printav(pv); 895 } 896 errno = 0; 897 898 CurHostName = m->m_mailer; 899 900 /* 901 ** Deal with the special case of mail handled through an IPC 902 ** connection. 903 ** In this case we don't actually fork. We must be 904 ** running SMTP for this to work. We will return a 905 ** zero pid to indicate that we are running IPC. 906 ** We also handle a debug version that just talks to stdin/out. 907 */ 908 909 curhost = NULL; 910 SmtpPhase = NULL; 911 mci = NULL; 912 913 #ifdef XDEBUG 914 { 915 char wbuf[MAXLINE]; 916 917 /* make absolutely certain 0, 1, and 2 are in use */ 918 sprintf(wbuf, "%s... openmailer(%s)", e->e_to, m->m_name); 919 checkfd012(wbuf); 920 } 921 #endif 922 923 /* check for Local Person Communication -- not for mortals!!! */ 924 if (strcmp(m->m_mailer, "[LPC]") == 0) 925 { 926 mci = (MCI *) xalloc(sizeof *mci); 927 bzero((char *) mci, sizeof *mci); 928 mci->mci_in = stdin; 929 mci->mci_out = stdout; 930 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 931 mci->mci_mailer = m; 932 } 933 else if (strcmp(m->m_mailer, "[IPC]") == 0 || 934 strcmp(m->m_mailer, "[TCP]") == 0) 935 { 936 #ifdef DAEMON 937 register int i; 938 register u_short port; 939 940 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0') 941 { 942 syserr("null host name for %s mailer", m->m_mailer); 943 rcode = EX_CONFIG; 944 goto give_up; 945 } 946 947 CurHostName = pv[1]; 948 curhost = hostsignature(m, pv[1], e); 949 950 if (curhost == NULL || curhost[0] == '\0') 951 { 952 syserr("null host signature for %s", pv[1]); 953 rcode = EX_OSERR; 954 goto give_up; 955 } 956 957 if (!clever) 958 { 959 syserr("554 non-clever IPC"); 960 rcode = EX_CONFIG; 961 goto give_up; 962 } 963 if (pv[2] != NULL) 964 port = atoi(pv[2]); 965 else 966 port = 0; 967 tryhost: 968 while (*curhost != '\0') 969 { 970 register char *p; 971 static char hostbuf[MAXNAME]; 972 973 /* pull the next host from the signature */ 974 p = strchr(curhost, ':'); 975 if (p == NULL) 976 p = &curhost[strlen(curhost)]; 977 if (p == curhost) 978 { 979 syserr("deliver: null host name in signature"); 980 curhost++; 981 continue; 982 } 983 strncpy(hostbuf, curhost, p - curhost); 984 hostbuf[p - curhost] = '\0'; 985 if (*p != '\0') 986 p++; 987 curhost = p; 988 989 /* see if we already know that this host is fried */ 990 CurHostName = hostbuf; 991 mci = mci_get(hostbuf, m); 992 if (mci->mci_state != MCIS_CLOSED) 993 { 994 if (tTd(11, 1)) 995 { 996 printf("openmailer: "); 997 mci_dump(mci, FALSE); 998 } 999 CurHostName = mci->mci_host; 1000 break; 1001 } 1002 mci->mci_mailer = m; 1003 if (mci->mci_exitstat != EX_OK) 1004 continue; 1005 1006 /* try the connection */ 1007 setproctitle("%s %s: %s", e->e_id, hostbuf, "user open"); 1008 message("Connecting to %s (%s)...", 1009 hostbuf, m->m_name); 1010 i = makeconnection(hostbuf, port, mci, 1011 bitnset(M_SECURE_PORT, m->m_flags)); 1012 mci->mci_exitstat = i; 1013 mci->mci_errno = errno; 1014 #ifdef NAMED_BIND 1015 mci->mci_herrno = h_errno; 1016 #endif 1017 if (i == EX_OK) 1018 { 1019 mci->mci_state = MCIS_OPENING; 1020 mci_cache(mci); 1021 if (TrafficLogFile != NULL) 1022 fprintf(TrafficLogFile, "%05d == CONNECT %s\n", 1023 getpid(), hostbuf); 1024 break; 1025 } 1026 else if (tTd(11, 1)) 1027 printf("openmailer: makeconnection => stat=%d, errno=%d\n", 1028 i, errno); 1029 1030 /* enter status of this host */ 1031 setstat(i); 1032 1033 /* should print some message here for -v mode */ 1034 } 1035 if (mci == NULL) 1036 { 1037 syserr("deliver: no host name"); 1038 rcode = EX_OSERR; 1039 goto give_up; 1040 } 1041 mci->mci_pid = 0; 1042 #else /* no DAEMON */ 1043 syserr("554 openmailer: no IPC"); 1044 if (tTd(11, 1)) 1045 printf("openmailer: NULL\n"); 1046 rcode = EX_UNAVAILABLE; 1047 goto give_up; 1048 #endif /* DAEMON */ 1049 } 1050 else 1051 { 1052 if (TrafficLogFile != NULL) 1053 { 1054 char **av; 1055 1056 fprintf(TrafficLogFile, "%05d === EXEC", getpid()); 1057 for (av = pv; *av != NULL; av++) 1058 fprintf(TrafficLogFile, " %s", *av); 1059 fprintf(TrafficLogFile, "\n"); 1060 } 1061 1062 /* create a pipe to shove the mail through */ 1063 if (pipe(mpvect) < 0) 1064 { 1065 syserr("%s... openmailer(%s): pipe (to mailer)", 1066 e->e_to, m->m_name); 1067 if (tTd(11, 1)) 1068 printf("openmailer: NULL\n"); 1069 rcode = EX_OSERR; 1070 goto give_up; 1071 } 1072 1073 /* if this mailer speaks smtp, create a return pipe */ 1074 if (clever && pipe(rpvect) < 0) 1075 { 1076 syserr("%s... openmailer(%s): pipe (from mailer)", 1077 e->e_to, m->m_name); 1078 (void) close(mpvect[0]); 1079 (void) close(mpvect[1]); 1080 if (tTd(11, 1)) 1081 printf("openmailer: NULL\n"); 1082 rcode = EX_OSERR; 1083 goto give_up; 1084 } 1085 1086 /* 1087 ** Actually fork the mailer process. 1088 ** DOFORK is clever about retrying. 1089 ** 1090 ** Dispose of SIGCHLD signal catchers that may be laying 1091 ** around so that endmail will get it. 1092 */ 1093 1094 if (e->e_xfp != NULL) 1095 (void) fflush(e->e_xfp); /* for debugging */ 1096 (void) fflush(stdout); 1097 # ifdef SIGCHLD 1098 (void) setsignal(SIGCHLD, SIG_DFL); 1099 # endif /* SIGCHLD */ 1100 DOFORK(FORK); 1101 /* pid is set by DOFORK */ 1102 if (pid < 0) 1103 { 1104 /* failure */ 1105 syserr("%s... openmailer(%s): cannot fork", 1106 e->e_to, m->m_name); 1107 (void) close(mpvect[0]); 1108 (void) close(mpvect[1]); 1109 if (clever) 1110 { 1111 (void) close(rpvect[0]); 1112 (void) close(rpvect[1]); 1113 } 1114 if (tTd(11, 1)) 1115 printf("openmailer: NULL\n"); 1116 rcode = EX_OSERR; 1117 goto give_up; 1118 } 1119 else if (pid == 0) 1120 { 1121 int i; 1122 int saveerrno; 1123 char **ep; 1124 char *env[MAXUSERENVIRON]; 1125 extern char **environ; 1126 extern int DtableSize; 1127 1128 /* child -- set up input & exec mailer */ 1129 (void) setsignal(SIGINT, SIG_IGN); 1130 (void) setsignal(SIGHUP, SIG_IGN); 1131 (void) setsignal(SIGTERM, SIG_DFL); 1132 1133 /* reset user and group */ 1134 if (!bitnset(M_RESTR, m->m_flags)) 1135 { 1136 if (ctladdr == NULL || ctladdr->q_uid == 0) 1137 { 1138 (void) initgroups(DefUser, DefGid); 1139 (void) setgid(DefGid); 1140 (void) setuid(DefUid); 1141 } 1142 else 1143 { 1144 (void) initgroups(ctladdr->q_ruser? 1145 ctladdr->q_ruser: ctladdr->q_user, 1146 ctladdr->q_gid); 1147 (void) setgid(ctladdr->q_gid); 1148 (void) setuid(ctladdr->q_uid); 1149 } 1150 } 1151 1152 if (tTd(11, 2)) 1153 printf("openmailer: running as r/euid=%d/%d\n", 1154 getuid(), geteuid()); 1155 1156 /* move into some "safe" directory */ 1157 if (m->m_execdir != NULL) 1158 { 1159 char *p, *q; 1160 char buf[MAXLINE]; 1161 1162 for (p = m->m_execdir; p != NULL; p = q) 1163 { 1164 q = strchr(p, ':'); 1165 if (q != NULL) 1166 *q = '\0'; 1167 expand(p, buf, &buf[sizeof buf] - 1, e); 1168 if (q != NULL) 1169 *q++ = ':'; 1170 if (tTd(11, 20)) 1171 printf("openmailer: trydir %s\n", 1172 buf); 1173 if (buf[0] != '\0' && chdir(buf) >= 0) 1174 break; 1175 } 1176 } 1177 1178 /* arrange to filter std & diag output of command */ 1179 if (clever) 1180 { 1181 (void) close(rpvect[0]); 1182 if (dup2(rpvect[1], STDOUT_FILENO) < 0) 1183 { 1184 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout", 1185 e->e_to, m->m_name, rpvect[1]); 1186 _exit(EX_OSERR); 1187 } 1188 (void) close(rpvect[1]); 1189 } 1190 else if (OpMode == MD_SMTP || HoldErrs) 1191 { 1192 /* put mailer output in transcript */ 1193 if (dup2(fileno(e->e_xfp), STDOUT_FILENO) < 0) 1194 { 1195 syserr("%s... openmailer(%s): cannot dup xscript %d for stdout", 1196 e->e_to, m->m_name, 1197 fileno(e->e_xfp)); 1198 _exit(EX_OSERR); 1199 } 1200 } 1201 if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) 1202 { 1203 syserr("%s... openmailer(%s): cannot dup stdout for stderr", 1204 e->e_to, m->m_name); 1205 _exit(EX_OSERR); 1206 } 1207 1208 /* arrange to get standard input */ 1209 (void) close(mpvect[1]); 1210 if (dup2(mpvect[0], STDIN_FILENO) < 0) 1211 { 1212 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin", 1213 e->e_to, m->m_name, mpvect[0]); 1214 _exit(EX_OSERR); 1215 } 1216 (void) close(mpvect[0]); 1217 1218 /* arrange for all the files to be closed */ 1219 for (i = 3; i < DtableSize; i++) 1220 { 1221 register int j; 1222 1223 if ((j = fcntl(i, F_GETFD, 0)) != -1) 1224 (void) fcntl(i, F_SETFD, j | 1); 1225 } 1226 1227 /* set up the mailer environment */ 1228 i = 0; 1229 env[i++] = "AGENT=sendmail"; 1230 for (ep = environ; *ep != NULL; ep++) 1231 { 1232 if (strncmp(*ep, "TZ=", 3) == 0) 1233 env[i++] = *ep; 1234 } 1235 env[i++] = NULL; 1236 1237 /* try to execute the mailer */ 1238 execve(m->m_mailer, pv, env); 1239 saveerrno = errno; 1240 syserr("Cannot exec %s", m->m_mailer); 1241 if (m == LocalMailer || transienterror(saveerrno)) 1242 _exit(EX_OSERR); 1243 _exit(EX_UNAVAILABLE); 1244 } 1245 1246 /* 1247 ** Set up return value. 1248 */ 1249 1250 mci = (MCI *) xalloc(sizeof *mci); 1251 bzero((char *) mci, sizeof *mci); 1252 mci->mci_mailer = m; 1253 mci->mci_state = clever ? MCIS_OPENING : MCIS_OPEN; 1254 mci->mci_pid = pid; 1255 (void) close(mpvect[0]); 1256 mci->mci_out = fdopen(mpvect[1], "w"); 1257 if (mci->mci_out == NULL) 1258 { 1259 syserr("deliver: cannot create mailer output channel, fd=%d", 1260 mpvect[1]); 1261 (void) close(mpvect[1]); 1262 if (clever) 1263 { 1264 (void) close(rpvect[0]); 1265 (void) close(rpvect[1]); 1266 } 1267 rcode = EX_OSERR; 1268 goto give_up; 1269 } 1270 if (clever) 1271 { 1272 (void) close(rpvect[1]); 1273 mci->mci_in = fdopen(rpvect[0], "r"); 1274 if (mci->mci_in == NULL) 1275 { 1276 syserr("deliver: cannot create mailer input channel, fd=%d", 1277 mpvect[1]); 1278 (void) close(rpvect[0]); 1279 fclose(mci->mci_out); 1280 mci->mci_out = NULL; 1281 rcode = EX_OSERR; 1282 goto give_up; 1283 } 1284 } 1285 else 1286 { 1287 mci->mci_flags |= MCIF_TEMP; 1288 mci->mci_in = NULL; 1289 } 1290 } 1291 1292 /* 1293 ** If we are in SMTP opening state, send initial protocol. 1294 */ 1295 1296 if (clever && mci->mci_state != MCIS_CLOSED) 1297 { 1298 smtpinit(m, mci, e); 1299 } 1300 if (tTd(11, 1)) 1301 { 1302 printf("openmailer: "); 1303 mci_dump(mci, FALSE); 1304 } 1305 1306 if (mci->mci_state != MCIS_OPEN) 1307 { 1308 /* couldn't open the mailer */ 1309 rcode = mci->mci_exitstat; 1310 errno = mci->mci_errno; 1311 #ifdef NAMED_BIND 1312 h_errno = mci->mci_herrno; 1313 #endif 1314 if (rcode == EX_OK) 1315 { 1316 /* shouldn't happen */ 1317 syserr("554 deliver: rcode=%d, mci_state=%d, sig=%s", 1318 rcode, mci->mci_state, firstsig); 1319 rcode = EX_SOFTWARE; 1320 } 1321 else if (rcode == EX_TEMPFAIL && curhost != NULL && *curhost != '\0') 1322 { 1323 /* try next MX site */ 1324 goto tryhost; 1325 } 1326 } 1327 else if (!clever) 1328 { 1329 /* 1330 ** Format and send message. 1331 */ 1332 1333 putfromline(mci->mci_out, m, e); 1334 (*e->e_puthdr)(mci->mci_out, m, e); 1335 putline("\n", mci->mci_out, m); 1336 (*e->e_putbody)(mci->mci_out, m, e, NULL); 1337 1338 /* get the exit status */ 1339 rcode = endmailer(mci, e, pv); 1340 } 1341 else 1342 #ifdef SMTP 1343 { 1344 /* 1345 ** Send the MAIL FROM: protocol 1346 */ 1347 1348 rcode = smtpmailfrom(m, mci, e); 1349 if (rcode == EX_OK) 1350 { 1351 register char *t = tobuf; 1352 register int i; 1353 1354 /* send the recipient list */ 1355 tobuf[0] = '\0'; 1356 for (to = tochain; to != NULL; to = to->q_tchain) 1357 { 1358 e->e_to = to->q_paddr; 1359 if ((i = smtprcpt(to, m, mci, e)) != EX_OK) 1360 { 1361 markfailure(e, to, i); 1362 giveresponse(i, m, mci, ctladdr, e); 1363 } 1364 else 1365 { 1366 *t++ = ','; 1367 for (p = to->q_paddr; *p; *t++ = *p++) 1368 continue; 1369 *t = '\0'; 1370 } 1371 } 1372 1373 /* now send the data */ 1374 if (tobuf[0] == '\0') 1375 { 1376 rcode = EX_OK; 1377 e->e_to = NULL; 1378 if (bitset(MCIF_CACHED, mci->mci_flags)) 1379 smtprset(m, mci, e); 1380 } 1381 else 1382 { 1383 e->e_to = tobuf + 1; 1384 rcode = smtpdata(m, mci, e); 1385 } 1386 1387 /* now close the connection */ 1388 if (!bitset(MCIF_CACHED, mci->mci_flags)) 1389 smtpquit(m, mci, e); 1390 } 1391 if (rcode != EX_OK && curhost != NULL && *curhost != '\0') 1392 { 1393 /* try next MX site */ 1394 goto tryhost; 1395 } 1396 } 1397 #else /* not SMTP */ 1398 { 1399 syserr("554 deliver: need SMTP compiled to use clever mailer"); 1400 rcode = EX_CONFIG; 1401 goto give_up; 1402 } 1403 #endif /* SMTP */ 1404 #ifdef NAMED_BIND 1405 if (ConfigLevel < 2) 1406 _res.options |= RES_DEFNAMES | RES_DNSRCH; /* XXX */ 1407 #endif 1408 1409 /* arrange a return receipt if requested */ 1410 if (rcode == EX_OK && e->e_receiptto != NULL && 1411 bitnset(M_LOCALMAILER, m->m_flags)) 1412 { 1413 e->e_flags |= EF_SENDRECEIPT; 1414 /* do we want to send back more info? */ 1415 } 1416 1417 /* 1418 ** Do final status disposal. 1419 ** We check for something in tobuf for the SMTP case. 1420 ** If we got a temporary failure, arrange to queue the 1421 ** addressees. 1422 */ 1423 1424 give_up: 1425 if (tobuf[0] != '\0') 1426 giveresponse(rcode, m, mci, ctladdr, e); 1427 for (to = tochain; to != NULL; to = to->q_tchain) 1428 { 1429 if (rcode != EX_OK) 1430 markfailure(e, to, rcode); 1431 else 1432 { 1433 to->q_flags |= QSENT; 1434 e->e_nsent++; 1435 if (e->e_receiptto != NULL && 1436 bitnset(M_LOCALMAILER, m->m_flags)) 1437 { 1438 fprintf(e->e_xfp, "%s... Successfully delivered\n", 1439 to->q_paddr); 1440 } 1441 } 1442 } 1443 1444 /* 1445 ** Restore state and return. 1446 */ 1447 1448 #ifdef XDEBUG 1449 { 1450 char wbuf[MAXLINE]; 1451 1452 /* make absolutely certain 0, 1, and 2 are in use */ 1453 sprintf(wbuf, "%s... end of deliver(%s)", 1454 e->e_to == NULL ? "NO-TO-LIST" : e->e_to, 1455 m->m_name); 1456 checkfd012(wbuf); 1457 } 1458 #endif 1459 1460 errno = 0; 1461 define('g', (char *) NULL, e); 1462 return (rcode); 1463 } 1464 /* 1465 ** MARKFAILURE -- mark a failure on a specific address. 1466 ** 1467 ** Parameters: 1468 ** e -- the envelope we are sending. 1469 ** q -- the address to mark. 1470 ** rcode -- the code signifying the particular failure. 1471 ** 1472 ** Returns: 1473 ** none. 1474 ** 1475 ** Side Effects: 1476 ** marks the address (and possibly the envelope) with the 1477 ** failure so that an error will be returned or 1478 ** the message will be queued, as appropriate. 1479 */ 1480 1481 markfailure(e, q, rcode) 1482 register ENVELOPE *e; 1483 register ADDRESS *q; 1484 int rcode; 1485 { 1486 char buf[MAXLINE]; 1487 1488 switch (rcode) 1489 { 1490 case EX_OK: 1491 break; 1492 1493 case EX_TEMPFAIL: 1494 case EX_IOERR: 1495 case EX_OSERR: 1496 q->q_flags |= QQUEUEUP; 1497 break; 1498 1499 default: 1500 q->q_flags |= QBADADDR; 1501 break; 1502 } 1503 } 1504 /* 1505 ** ENDMAILER -- Wait for mailer to terminate. 1506 ** 1507 ** We should never get fatal errors (e.g., segmentation 1508 ** violation), so we report those specially. For other 1509 ** errors, we choose a status message (into statmsg), 1510 ** and if it represents an error, we print it. 1511 ** 1512 ** Parameters: 1513 ** pid -- pid of mailer. 1514 ** e -- the current envelope. 1515 ** pv -- the parameter vector that invoked the mailer 1516 ** (for error messages). 1517 ** 1518 ** Returns: 1519 ** exit code of mailer. 1520 ** 1521 ** Side Effects: 1522 ** none. 1523 */ 1524 1525 endmailer(mci, e, pv) 1526 register MCI *mci; 1527 register ENVELOPE *e; 1528 char **pv; 1529 { 1530 int st; 1531 1532 /* close any connections */ 1533 if (mci->mci_in != NULL) 1534 (void) xfclose(mci->mci_in, pv[0], "mci_in"); 1535 if (mci->mci_out != NULL) 1536 (void) xfclose(mci->mci_out, pv[0], "mci_out"); 1537 mci->mci_in = mci->mci_out = NULL; 1538 mci->mci_state = MCIS_CLOSED; 1539 1540 /* in the IPC case there is nothing to wait for */ 1541 if (mci->mci_pid == 0) 1542 return (EX_OK); 1543 1544 /* wait for the mailer process to die and collect status */ 1545 st = waitfor(mci->mci_pid); 1546 if (st == -1) 1547 { 1548 syserr("endmailer %s: wait", pv[0]); 1549 return (EX_SOFTWARE); 1550 } 1551 1552 if (WIFEXITED(st)) 1553 { 1554 /* normal death -- return status */ 1555 return (WEXITSTATUS(st)); 1556 } 1557 1558 /* it died a horrid death */ 1559 syserr("mailer %s died with signal %o", pv[0], st); 1560 1561 /* log the arguments */ 1562 if (e->e_xfp != NULL) 1563 { 1564 register char **av; 1565 1566 fprintf(e->e_xfp, "Arguments:"); 1567 for (av = pv; *av != NULL; av++) 1568 fprintf(e->e_xfp, " %s", *av); 1569 fprintf(e->e_xfp, "\n"); 1570 } 1571 1572 ExitStat = EX_TEMPFAIL; 1573 return (EX_TEMPFAIL); 1574 } 1575 /* 1576 ** GIVERESPONSE -- Interpret an error response from a mailer 1577 ** 1578 ** Parameters: 1579 ** stat -- the status code from the mailer (high byte 1580 ** only; core dumps must have been taken care of 1581 ** already). 1582 ** m -- the mailer info for this mailer. 1583 ** mci -- the mailer connection info -- can be NULL if the 1584 ** response is given before the connection is made. 1585 ** ctladdr -- the controlling address for the recipient 1586 ** address(es). 1587 ** e -- the current envelope. 1588 ** 1589 ** Returns: 1590 ** none. 1591 ** 1592 ** Side Effects: 1593 ** Errors may be incremented. 1594 ** ExitStat may be set. 1595 */ 1596 1597 giveresponse(stat, m, mci, ctladdr, e) 1598 int stat; 1599 register MAILER *m; 1600 register MCI *mci; 1601 ADDRESS *ctladdr; 1602 ENVELOPE *e; 1603 { 1604 register const char *statmsg; 1605 extern char *SysExMsg[]; 1606 register int i; 1607 extern int N_SysEx; 1608 char buf[MAXLINE]; 1609 1610 /* 1611 ** Compute status message from code. 1612 */ 1613 1614 i = stat - EX__BASE; 1615 if (stat == 0) 1616 { 1617 statmsg = "250 Sent"; 1618 if (e->e_statmsg != NULL) 1619 { 1620 (void) sprintf(buf, "%s (%s)", statmsg, e->e_statmsg); 1621 statmsg = buf; 1622 } 1623 } 1624 else if (i < 0 || i > N_SysEx) 1625 { 1626 (void) sprintf(buf, "554 unknown mailer error %d", stat); 1627 stat = EX_UNAVAILABLE; 1628 statmsg = buf; 1629 } 1630 else if (stat == EX_TEMPFAIL) 1631 { 1632 (void) strcpy(buf, SysExMsg[i] + 1); 1633 #ifdef NAMED_BIND 1634 if (h_errno == TRY_AGAIN) 1635 statmsg = errstring(h_errno+E_DNSBASE); 1636 else 1637 #endif 1638 { 1639 if (errno != 0) 1640 statmsg = errstring(errno); 1641 else 1642 { 1643 #ifdef SMTP 1644 statmsg = SmtpError; 1645 #else /* SMTP */ 1646 statmsg = NULL; 1647 #endif /* SMTP */ 1648 } 1649 } 1650 if (statmsg != NULL && statmsg[0] != '\0') 1651 { 1652 (void) strcat(buf, ": "); 1653 (void) strcat(buf, statmsg); 1654 } 1655 statmsg = buf; 1656 } 1657 #ifdef NAMED_BIND 1658 else if (stat == EX_NOHOST && h_errno != 0) 1659 { 1660 statmsg = errstring(h_errno + E_DNSBASE); 1661 (void) sprintf(buf, "%s (%s)", SysExMsg[i], statmsg); 1662 statmsg = buf; 1663 } 1664 #endif 1665 else 1666 { 1667 statmsg = SysExMsg[i]; 1668 if (*statmsg++ == ':') 1669 { 1670 (void) sprintf(buf, "%s: %s", statmsg, errstring(errno)); 1671 statmsg = buf; 1672 } 1673 } 1674 1675 /* 1676 ** Print the message as appropriate 1677 */ 1678 1679 if (stat == EX_OK || stat == EX_TEMPFAIL) 1680 { 1681 extern char MsgBuf[]; 1682 1683 message(&statmsg[4], errstring(errno)); 1684 if (stat == EX_TEMPFAIL && e->e_xfp != NULL) 1685 fprintf(e->e_xfp, "%s\n", &MsgBuf[4]); 1686 } 1687 else 1688 { 1689 Errors++; 1690 usrerr(statmsg, errstring(errno)); 1691 } 1692 1693 /* 1694 ** Final cleanup. 1695 ** Log a record of the transaction. Compute the new 1696 ** ExitStat -- if we already had an error, stick with 1697 ** that. 1698 */ 1699 1700 if (LogLevel > ((stat == EX_TEMPFAIL) ? 8 : (stat == EX_OK) ? 7 : 6)) 1701 logdelivery(m, mci, &statmsg[4], ctladdr, e); 1702 1703 if (stat != EX_TEMPFAIL) 1704 setstat(stat); 1705 if (stat != EX_OK && (stat != EX_TEMPFAIL || e->e_message == NULL)) 1706 { 1707 if (e->e_message != NULL) 1708 free(e->e_message); 1709 e->e_message = newstr(&statmsg[4]); 1710 } 1711 errno = 0; 1712 #ifdef NAMED_BIND 1713 h_errno = 0; 1714 #endif 1715 } 1716 /* 1717 ** LOGDELIVERY -- log the delivery in the system log 1718 ** 1719 ** Care is taken to avoid logging lines that are too long, because 1720 ** some versions of syslog have an unfortunate proclivity for core 1721 ** dumping. This is a hack, to be sure, that is at best empirical. 1722 ** 1723 ** Parameters: 1724 ** m -- the mailer info. Can be NULL for initial queue. 1725 ** mci -- the mailer connection info -- can be NULL if the 1726 ** log is occuring when no connection is active. 1727 ** stat -- the message to print for the status. 1728 ** ctladdr -- the controlling address for the to list. 1729 ** e -- the current envelope. 1730 ** 1731 ** Returns: 1732 ** none 1733 ** 1734 ** Side Effects: 1735 ** none 1736 */ 1737 1738 logdelivery(m, mci, stat, ctladdr, e) 1739 MAILER *m; 1740 register MCI *mci; 1741 char *stat; 1742 ADDRESS *ctladdr; 1743 register ENVELOPE *e; 1744 { 1745 # ifdef LOG 1746 register char *bp; 1747 register char *p; 1748 int l; 1749 char buf[512]; 1750 1751 # if (SYSLOG_BUFSIZE) >= 256 1752 bp = buf; 1753 if (ctladdr != NULL) 1754 { 1755 strcpy(bp, ", ctladdr="); 1756 strcat(bp, shortenstring(ctladdr->q_paddr, 83)); 1757 bp += strlen(bp); 1758 if (bitset(QGOODUID, ctladdr->q_flags)) 1759 { 1760 (void) sprintf(bp, " (%d/%d)", 1761 ctladdr->q_uid, ctladdr->q_gid); 1762 bp += strlen(bp); 1763 } 1764 } 1765 1766 (void) sprintf(bp, ", delay=%s", pintvl(curtime() - e->e_ctime, TRUE)); 1767 bp += strlen(bp); 1768 1769 if (m != NULL) 1770 { 1771 (void) strcpy(bp, ", mailer="); 1772 (void) strcat(bp, m->m_name); 1773 bp += strlen(bp); 1774 } 1775 1776 if (mci != NULL && mci->mci_host != NULL) 1777 { 1778 # ifdef DAEMON 1779 extern SOCKADDR CurHostAddr; 1780 # endif 1781 1782 (void) strcpy(bp, ", relay="); 1783 (void) strcat(bp, mci->mci_host); 1784 1785 # ifdef DAEMON 1786 (void) strcat(bp, " ("); 1787 (void) strcat(bp, anynet_ntoa(&CurHostAddr)); 1788 (void) strcat(bp, ")"); 1789 # endif 1790 } 1791 else 1792 { 1793 char *p = macvalue('h', e); 1794 1795 if (p != NULL && p[0] != '\0') 1796 { 1797 (void) strcpy(bp, ", relay="); 1798 (void) strcat(bp, p); 1799 } 1800 } 1801 bp += strlen(bp); 1802 1803 #define STATLEN (((SYSLOG_BUFSIZE) - 100) / 4) 1804 #if (STATLEN) < 63 1805 # undef STATLEN 1806 # define STATLEN 63 1807 #endif 1808 #if (STATLEN) > 203 1809 # undef STATLEN 1810 # define STATLEN 203 1811 #endif 1812 1813 if ((bp - buf) > (sizeof buf - ((STATLEN) + 20))) 1814 { 1815 /* desperation move -- truncate data */ 1816 bp = buf + sizeof buf - ((STATLEN) + 17); 1817 strcpy(bp, "..."); 1818 bp += 3; 1819 } 1820 1821 (void) strcpy(bp, ", stat="); 1822 bp += strlen(bp); 1823 1824 (void) strcpy(bp, shortenstring(stat, (STATLEN))); 1825 1826 l = SYSLOG_BUFSIZE - 100 - strlen(buf); 1827 p = e->e_to; 1828 while (strlen(p) >= l) 1829 { 1830 register char *q = strchr(p + l, ','); 1831 1832 if (q == NULL) 1833 break; 1834 syslog(LOG_INFO, "%s: to=%.*s [more]%s", 1835 e->e_id, ++q - p, p, buf); 1836 p = q; 1837 } 1838 syslog(LOG_INFO, "%s: to=%s%s", e->e_id, p, buf); 1839 1840 # else /* we have a very short log buffer size */ 1841 1842 l = SYSLOG_BUFSIZE - 40; 1843 p = e->e_to; 1844 while (strlen(p) >= l) 1845 { 1846 register char *q = strchr(p + l, ','); 1847 1848 if (q == NULL) 1849 break; 1850 syslog(LOG_INFO, "%s: to=%.*s [more]", 1851 e->e_id, ++q - p, p); 1852 p = q; 1853 } 1854 syslog(LOG_INFO, "%s: to=%s", e->e_id, p); 1855 1856 if (ctladdr != NULL) 1857 { 1858 bp = buf; 1859 strcpy(buf, "ctladdr="); 1860 bp += strlen(buf); 1861 strcpy(bp, shortenstring(ctladdr->q_paddr, 83)); 1862 bp += strlen(buf); 1863 if (bitset(QGOODUID, ctladdr->q_flags)) 1864 { 1865 (void) sprintf(bp, " (%d/%d)", 1866 ctladdr->q_uid, ctladdr->q_gid); 1867 bp += strlen(bp); 1868 } 1869 syslog(LOG_INFO, "%s: %s", e->e_id, buf); 1870 } 1871 syslog(LOG_INFO, "%s: delay=%s", 1872 e->e_id, pintvl(curtime() - e->e_ctime, TRUE)); 1873 1874 if (m != NULL) 1875 syslog(LOG_INFO, "%s: mailer=%s", e->e_id, m->m_name); 1876 1877 if (mci != NULL && mci->mci_host != NULL) 1878 { 1879 # ifdef DAEMON 1880 extern SOCKADDR CurHostAddr; 1881 # endif 1882 1883 (void) strcpy(buf, mci->mci_host); 1884 1885 # ifdef DAEMON 1886 (void) strcat(buf, " ("); 1887 (void) strcat(buf, anynet_ntoa(&CurHostAddr)); 1888 (void) strcat(buf, ")"); 1889 # endif 1890 syslog(LOG_INFO, "%s: relay=%s", e->e_id, buf); 1891 } 1892 else 1893 { 1894 char *p = macvalue('h', e); 1895 1896 if (p != NULL && p[0] != '\0') 1897 syslog(LOG_INFO, "%s: relay=%s", e->e_id, p); 1898 } 1899 1900 strcpy(bp, ", stat="); 1901 bp += strlen(bp); 1902 1903 syslog(LOG_INFO, "%s: stat=%s", e->e_id, shortenstring(stat, 63)); 1904 # endif /* short log buffer */ 1905 # endif /* LOG */ 1906 } 1907 /* 1908 ** PUTFROMLINE -- output a UNIX-style from line (or whatever) 1909 ** 1910 ** This can be made an arbitrary message separator by changing $l 1911 ** 1912 ** One of the ugliest hacks seen by human eyes is contained herein: 1913 ** UUCP wants those stupid "remote from <host>" lines. Why oh why 1914 ** does a well-meaning programmer such as myself have to deal with 1915 ** this kind of antique garbage???? 1916 ** 1917 ** Parameters: 1918 ** fp -- the file to output to. 1919 ** m -- the mailer describing this entry. 1920 ** 1921 ** Returns: 1922 ** none 1923 ** 1924 ** Side Effects: 1925 ** outputs some text to fp. 1926 */ 1927 1928 putfromline(fp, m, e) 1929 register FILE *fp; 1930 register MAILER *m; 1931 ENVELOPE *e; 1932 { 1933 char *template = "\201l\n"; 1934 char buf[MAXLINE]; 1935 1936 if (bitnset(M_NHDR, m->m_flags)) 1937 return; 1938 1939 # ifdef UGLYUUCP 1940 if (bitnset(M_UGLYUUCP, m->m_flags)) 1941 { 1942 char *bang; 1943 char xbuf[MAXLINE]; 1944 1945 expand("\201g", buf, &buf[sizeof buf - 1], e); 1946 bang = strchr(buf, '!'); 1947 if (bang == NULL) 1948 { 1949 errno = 0; 1950 syserr("554 No ! in UUCP From address! (%s given)", buf); 1951 } 1952 else 1953 { 1954 *bang++ = '\0'; 1955 (void) sprintf(xbuf, "From %s \201d remote from %s\n", bang, buf); 1956 template = xbuf; 1957 } 1958 } 1959 # endif /* UGLYUUCP */ 1960 expand(template, buf, &buf[sizeof buf - 1], e); 1961 putline(buf, fp, m); 1962 } 1963 /* 1964 ** PUTBODY -- put the body of a message. 1965 ** 1966 ** Parameters: 1967 ** fp -- file to output onto. 1968 ** m -- a mailer descriptor to control output format. 1969 ** e -- the envelope to put out. 1970 ** separator -- if non-NULL, a message separator that must 1971 ** not be permitted in the resulting message. 1972 ** 1973 ** Returns: 1974 ** none. 1975 ** 1976 ** Side Effects: 1977 ** The message is written onto fp. 1978 */ 1979 1980 putbody(fp, m, e, separator) 1981 FILE *fp; 1982 MAILER *m; 1983 register ENVELOPE *e; 1984 char *separator; 1985 { 1986 char buf[MAXLINE]; 1987 1988 /* 1989 ** Output the body of the message 1990 */ 1991 1992 if (e->e_dfp == NULL) 1993 { 1994 if (e->e_df != NULL) 1995 { 1996 e->e_dfp = fopen(e->e_df, "r"); 1997 if (e->e_dfp == NULL) 1998 syserr("putbody: Cannot open %s for %s from %s", 1999 e->e_df, e->e_to, e->e_from.q_paddr); 2000 } 2001 else 2002 putline("<<< No Message Collected >>>", fp, m); 2003 } 2004 if (e->e_dfp != NULL) 2005 { 2006 rewind(e->e_dfp); 2007 while (!ferror(fp) && fgets(buf, sizeof buf, e->e_dfp) != NULL) 2008 { 2009 if (buf[0] == 'F' && bitnset(M_ESCFROM, m->m_flags) && 2010 strncmp(buf, "From ", 5) == 0) 2011 (void) putc('>', fp); 2012 if (buf[0] == '-' && buf[1] == '-' && separator != NULL) 2013 { 2014 /* possible separator */ 2015 int sl = strlen(separator); 2016 2017 if (strncmp(&buf[2], separator, sl) == 0) 2018 (void) putc(' ', fp); 2019 } 2020 putline(buf, fp, m); 2021 } 2022 2023 if (ferror(e->e_dfp)) 2024 { 2025 syserr("putbody: %s: read error", e->e_df); 2026 ExitStat = EX_IOERR; 2027 } 2028 } 2029 2030 /* some mailers want extra blank line at end of message */ 2031 if (bitnset(M_BLANKEND, m->m_flags) && buf[0] != '\0' && buf[0] != '\n') 2032 putline("", fp, m); 2033 2034 (void) fflush(fp); 2035 if (ferror(fp) && errno != EPIPE) 2036 { 2037 syserr("putbody: write error"); 2038 ExitStat = EX_IOERR; 2039 } 2040 errno = 0; 2041 } 2042 /* 2043 ** MAILFILE -- Send a message to a file. 2044 ** 2045 ** If the file has the setuid/setgid bits set, but NO execute 2046 ** bits, sendmail will try to become the owner of that file 2047 ** rather than the real user. Obviously, this only works if 2048 ** sendmail runs as root. 2049 ** 2050 ** This could be done as a subordinate mailer, except that it 2051 ** is used implicitly to save messages in ~/dead.letter. We 2052 ** view this as being sufficiently important as to include it 2053 ** here. For example, if the system is dying, we shouldn't have 2054 ** to create another process plus some pipes to save the message. 2055 ** 2056 ** Parameters: 2057 ** filename -- the name of the file to send to. 2058 ** ctladdr -- the controlling address header -- includes 2059 ** the userid/groupid to be when sending. 2060 ** 2061 ** Returns: 2062 ** The exit code associated with the operation. 2063 ** 2064 ** Side Effects: 2065 ** none. 2066 */ 2067 2068 mailfile(filename, ctladdr, e) 2069 char *filename; 2070 ADDRESS *ctladdr; 2071 register ENVELOPE *e; 2072 { 2073 register FILE *f; 2074 register int pid; 2075 int mode; 2076 2077 if (tTd(11, 1)) 2078 { 2079 printf("mailfile %s\n ctladdr=", filename); 2080 printaddr(ctladdr, FALSE); 2081 } 2082 2083 if (e->e_xfp != NULL) 2084 fflush(e->e_xfp); 2085 2086 /* 2087 ** Fork so we can change permissions here. 2088 ** Note that we MUST use fork, not vfork, because of 2089 ** the complications of calling subroutines, etc. 2090 */ 2091 2092 DOFORK(fork); 2093 2094 if (pid < 0) 2095 return (EX_OSERR); 2096 else if (pid == 0) 2097 { 2098 /* child -- actually write to file */ 2099 struct stat stb; 2100 2101 (void) setsignal(SIGINT, SIG_DFL); 2102 (void) setsignal(SIGHUP, SIG_DFL); 2103 (void) setsignal(SIGTERM, SIG_DFL); 2104 (void) umask(OldUmask); 2105 2106 if (stat(filename, &stb) < 0) 2107 stb.st_mode = FileMode; 2108 mode = stb.st_mode; 2109 2110 /* limit the errors to those actually caused in the child */ 2111 errno = 0; 2112 ExitStat = EX_OK; 2113 2114 if (bitset(0111, stb.st_mode)) 2115 exit(EX_CANTCREAT); 2116 if (ctladdr != NULL) 2117 { 2118 /* ignore setuid and setgid bits */ 2119 mode &= ~(S_ISGID|S_ISUID); 2120 } 2121 2122 /* we have to open the dfile BEFORE setuid */ 2123 if (e->e_dfp == NULL && e->e_df != NULL) 2124 { 2125 e->e_dfp = fopen(e->e_df, "r"); 2126 if (e->e_dfp == NULL) 2127 { 2128 syserr("mailfile: Cannot open %s for %s from %s", 2129 e->e_df, e->e_to, e->e_from.q_paddr); 2130 } 2131 } 2132 2133 if (!bitset(S_ISGID, mode) || setgid(stb.st_gid) < 0) 2134 { 2135 if (ctladdr == NULL || ctladdr->q_uid == 0) 2136 { 2137 (void) initgroups(DefUser, DefGid); 2138 } 2139 else 2140 { 2141 (void) initgroups(ctladdr->q_ruser ? 2142 ctladdr->q_ruser : ctladdr->q_user, 2143 ctladdr->q_gid); 2144 } 2145 } 2146 if (!bitset(S_ISUID, mode) || setuid(stb.st_uid) < 0) 2147 { 2148 if (ctladdr == NULL || ctladdr->q_uid == 0) 2149 (void) setuid(DefUid); 2150 else 2151 (void) setuid(ctladdr->q_uid); 2152 } 2153 FileName = filename; 2154 LineNumber = 0; 2155 f = dfopen(filename, O_WRONLY|O_CREAT|O_APPEND, FileMode); 2156 if (f == NULL) 2157 { 2158 message("554 cannot open: %s", errstring(errno)); 2159 exit(EX_CANTCREAT); 2160 } 2161 2162 putfromline(f, FileMailer, e); 2163 (*e->e_puthdr)(f, FileMailer, e); 2164 putline("\n", f, FileMailer); 2165 (*e->e_putbody)(f, FileMailer, e, NULL); 2166 putline("\n", f, FileMailer); 2167 if (ferror(f)) 2168 { 2169 message("451 I/O error: %s", errstring(errno)); 2170 setstat(EX_IOERR); 2171 } 2172 (void) xfclose(f, "mailfile", filename); 2173 (void) fflush(stdout); 2174 2175 /* reset ISUID & ISGID bits for paranoid systems */ 2176 (void) chmod(filename, (int) stb.st_mode); 2177 exit(ExitStat); 2178 /*NOTREACHED*/ 2179 } 2180 else 2181 { 2182 /* parent -- wait for exit status */ 2183 int st; 2184 2185 st = waitfor(pid); 2186 if (WIFEXITED(st)) 2187 return (WEXITSTATUS(st)); 2188 else 2189 { 2190 syserr("child died on signal %d", st); 2191 return (EX_UNAVAILABLE); 2192 } 2193 /*NOTREACHED*/ 2194 } 2195 } 2196 /* 2197 ** HOSTSIGNATURE -- return the "signature" for a host. 2198 ** 2199 ** The signature describes how we are going to send this -- it 2200 ** can be just the hostname (for non-Internet hosts) or can be 2201 ** an ordered list of MX hosts. 2202 ** 2203 ** Parameters: 2204 ** m -- the mailer describing this host. 2205 ** host -- the host name. 2206 ** e -- the current envelope. 2207 ** 2208 ** Returns: 2209 ** The signature for this host. 2210 ** 2211 ** Side Effects: 2212 ** Can tweak the symbol table. 2213 */ 2214 2215 char * 2216 hostsignature(m, host, e) 2217 register MAILER *m; 2218 char *host; 2219 ENVELOPE *e; 2220 { 2221 register char *p; 2222 register STAB *s; 2223 int i; 2224 int len; 2225 #ifdef NAMED_BIND 2226 int nmx; 2227 auto int rcode; 2228 char *hp; 2229 char *endp; 2230 int oldoptions; 2231 char *mxhosts[MAXMXHOSTS + 1]; 2232 #endif 2233 2234 /* 2235 ** Check to see if this uses IPC -- if not, it can't have MX records. 2236 */ 2237 2238 p = m->m_mailer; 2239 if (strcmp(p, "[IPC]") != 0 && strcmp(p, "[TCP]") != 0) 2240 { 2241 /* just an ordinary mailer */ 2242 return host; 2243 } 2244 2245 /* 2246 ** Look it up in the symbol table. 2247 */ 2248 2249 s = stab(host, ST_HOSTSIG, ST_ENTER); 2250 if (s->s_hostsig != NULL) 2251 return s->s_hostsig; 2252 2253 /* 2254 ** Not already there -- create a signature. 2255 */ 2256 2257 #ifdef NAMED_BIND 2258 if (ConfigLevel < 2) 2259 { 2260 oldoptions = _res.options; 2261 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH); /* XXX */ 2262 } 2263 2264 for (hp = host; hp != NULL; hp = endp) 2265 { 2266 endp = strchr(hp, ':'); 2267 if (endp != NULL) 2268 *endp = '\0'; 2269 2270 nmx = getmxrr(hp, mxhosts, TRUE, &rcode); 2271 2272 if (nmx <= 0) 2273 { 2274 register MCI *mci; 2275 2276 /* update the connection info for this host */ 2277 mci = mci_get(hp, m); 2278 mci->mci_exitstat = rcode; 2279 mci->mci_errno = errno; 2280 #ifdef NAMED_BIND 2281 mci->mci_herrno = h_errno; 2282 #endif 2283 2284 /* and return the original host name as the signature */ 2285 nmx = 1; 2286 mxhosts[0] = hp; 2287 } 2288 2289 len = 0; 2290 for (i = 0; i < nmx; i++) 2291 { 2292 len += strlen(mxhosts[i]) + 1; 2293 } 2294 if (s->s_hostsig != NULL) 2295 len += strlen(s->s_hostsig) + 1; 2296 p = xalloc(len); 2297 if (s->s_hostsig != NULL) 2298 { 2299 (void) strcpy(p, s->s_hostsig); 2300 free(s->s_hostsig); 2301 s->s_hostsig = p; 2302 p += strlen(p); 2303 *p++ = ':'; 2304 } 2305 else 2306 s->s_hostsig = p; 2307 for (i = 0; i < nmx; i++) 2308 { 2309 if (i != 0) 2310 *p++ = ':'; 2311 strcpy(p, mxhosts[i]); 2312 p += strlen(p); 2313 } 2314 if (endp != NULL) 2315 *endp++ = ':'; 2316 } 2317 makelower(s->s_hostsig); 2318 if (ConfigLevel < 2) 2319 _res.options = oldoptions; 2320 #else 2321 /* not using BIND -- the signature is just the host name */ 2322 s->s_hostsig = host; 2323 #endif 2324 if (tTd(17, 1)) 2325 printf("hostsignature(%s) = %s\n", host, s->s_hostsig); 2326 return s->s_hostsig; 2327 } 2328