1 # include <signal.h> 2 # include <errno.h> 3 # include "sendmail.h" 4 # include <sys/stat.h> 5 # ifdef LOG 6 # include <syslog.h> 7 # endif LOG 8 9 SCCSID(@(#)deliver.c 3.75 03/27/82); 10 11 /* 12 ** DELIVER -- Deliver a message to a list of addresses. 13 ** 14 ** This routine delivers to everyone on the same host as the 15 ** user on the head of the list. It is clever about mailers 16 ** that don't handle multiple users. It is NOT guaranteed 17 ** that it will deliver to all these addresses however -- so 18 ** deliver should be called once for each address on the 19 ** list. 20 ** 21 ** Parameters: 22 ** firstto -- head of the address list to deliver to. 23 ** editfcn -- if non-NULL, we want to call this function 24 ** to output the letter (instead of just out- 25 ** putting it raw). 26 ** 27 ** Returns: 28 ** zero -- successfully delivered. 29 ** else -- some failure, see ExitStat for more info. 30 ** 31 ** Side Effects: 32 ** The standard input is passed off to someone. 33 */ 34 35 deliver(firstto, editfcn) 36 ADDRESS *firstto; 37 int (*editfcn)(); 38 { 39 char *host; /* host being sent to */ 40 char *user; /* user being sent to */ 41 char **pvp; 42 register char **mvp; 43 register char *p; 44 register struct mailer *m; /* mailer for this recipient */ 45 register int i; 46 extern putmessage(); 47 extern bool checkcompat(); 48 char *pv[MAXPV+1]; 49 char tobuf[MAXLINE]; /* text line of to people */ 50 char buf[MAXNAME]; 51 ADDRESS *ctladdr; 52 extern ADDRESS *getctladdr(); 53 char tfrombuf[MAXNAME]; /* translated from person */ 54 extern char **prescan(); 55 register ADDRESS *to = firstto; 56 bool clever = FALSE; /* running user smtp to this mailer */ 57 bool tempfail = FALSE; 58 ADDRESS *tochain = NULL; /* chain of users in this mailer call */ 59 60 errno = 0; 61 if (!ForceMail && bitset(QDONTSEND, to->q_flags)) 62 return (0); 63 64 # ifdef DEBUG 65 if (Debug) 66 printf("\n--deliver, mailer=%d, host=`%s', first user=`%s'\n", 67 to->q_mailer->m_mno, to->q_host, to->q_user); 68 # endif DEBUG 69 70 m = to->q_mailer; 71 host = to->q_host; 72 73 /* 74 ** If this mailer is expensive, and if we don't want to make 75 ** connections now, just mark these addresses and return. 76 ** This is useful if we want to batch connections to 77 ** reduce load. This will cause the messages to be 78 ** queued up, and a daemon will come along to send the 79 ** messages later. 80 ** This should be on a per-mailer basis. 81 */ 82 83 if (NoConnect && !QueueRun && bitset(M_EXPENSIVE, m->m_flags)) 84 { 85 QueueUp = TRUE; 86 for (; to != NULL; to = to->q_next) 87 if (!bitset(QDONTSEND, to->q_flags)) 88 to->q_flags |= QQUEUEUP|QDONTSEND; 89 return (0); 90 } 91 92 /* 93 ** Do initial argv setup. 94 ** Insert the mailer name. Notice that $x expansion is 95 ** NOT done on the mailer name. Then, if the mailer has 96 ** a picky -f flag, we insert it as appropriate. This 97 ** code does not check for 'pv' overflow; this places a 98 ** manifest lower limit of 4 for MAXPV. 99 ** We rewrite the from address here, being careful 100 ** to also rewrite it again using ruleset 2 to 101 ** eliminate redundancies. 102 */ 103 104 /* rewrite from address, using rewriting rules */ 105 (void) expand(m->m_from, buf, &buf[sizeof buf - 1]); 106 mvp = prescan(buf, '\0'); 107 if (mvp == NULL) 108 { 109 syserr("bad mailer from translate \"%s\"", buf); 110 return (EX_SOFTWARE); 111 } 112 rewrite(mvp, 2); 113 cataddr(mvp, tfrombuf, sizeof tfrombuf); 114 115 define('g', tfrombuf); /* translated sender address */ 116 define('h', host); /* to host */ 117 Errors = 0; 118 pvp = pv; 119 *pvp++ = m->m_argv[0]; 120 121 /* insert -f or -r flag as appropriate */ 122 if (bitset(M_FOPT|M_ROPT, m->m_flags) && FromFlag) 123 { 124 if (bitset(M_FOPT, m->m_flags)) 125 *pvp++ = "-f"; 126 else 127 *pvp++ = "-r"; 128 (void) expand("$g", buf, &buf[sizeof buf - 1]); 129 *pvp++ = newstr(buf); 130 } 131 132 /* 133 ** Append the other fixed parts of the argv. These run 134 ** up to the first entry containing "$u". There can only 135 ** be one of these, and there are only a few more slots 136 ** in the pv after it. 137 */ 138 139 for (mvp = m->m_argv; (p = *++mvp) != NULL; ) 140 { 141 while ((p = index(p, '$')) != NULL) 142 if (*++p == 'u') 143 break; 144 if (p != NULL) 145 break; 146 147 /* this entry is safe -- go ahead and process it */ 148 (void) expand(*mvp, buf, &buf[sizeof buf - 1]); 149 *pvp++ = newstr(buf); 150 if (pvp >= &pv[MAXPV - 3]) 151 { 152 syserr("Too many parameters to %s before $u", pv[0]); 153 return (-1); 154 } 155 } 156 157 /* 158 ** If we have no substitution for the user name in the argument 159 ** list, we know that we must supply the names otherwise -- and 160 ** SMTP is the answer!! 161 */ 162 163 if (*mvp == NULL) 164 { 165 /* running SMTP */ 166 # ifdef SMTP 167 clever = TRUE; 168 *pvp = NULL; 169 170 /* send the initial SMTP protocol */ 171 smtpinit(m, pv, (ADDRESS *) NULL); 172 # ifdef QUEUE 173 if (i == EX_TEMPFAIL) 174 { 175 QueueUp = TRUE; 176 tempfail = TRUE; 177 } 178 # endif QUEUE 179 # else SMTP 180 /* oops! we don't implement SMTP */ 181 syserr("SMTP style mailer"); 182 return (EX_SOFTWARE); 183 # endif SMTP 184 } 185 186 /* 187 ** At this point *mvp points to the argument with $u. We 188 ** run through our address list and append all the addresses 189 ** we can. If we run out of space, do not fret! We can 190 ** always send another copy later. 191 */ 192 193 tobuf[0] = '\0'; 194 To = tobuf; 195 ctladdr = NULL; 196 for (; to != NULL; to = to->q_next) 197 { 198 /* avoid sending multiple recipients to dumb mailers */ 199 if (tobuf[0] != '\0' && !bitset(M_MUSER, m->m_flags)) 200 break; 201 202 /* if already sent or not for this host, don't send */ 203 if ((!ForceMail && bitset(QDONTSEND, to->q_flags)) || 204 strcmp(to->q_host, host) != 0 || to->q_mailer != firstto->q_mailer) 205 continue; 206 207 # ifdef DEBUG 208 if (Debug) 209 { 210 printf("\nsend to "); 211 printaddr(to, FALSE); 212 } 213 # endif DEBUG 214 215 /* compute effective uid/gid when sending */ 216 if (to->q_mailer == ProgMailer) 217 ctladdr = getctladdr(to); 218 219 user = to->q_user; 220 To = to->q_paddr; 221 to->q_flags |= QDONTSEND; 222 if (tempfail) 223 { 224 to->q_flags |= QQUEUEUP; 225 continue; 226 } 227 228 /* 229 ** Check to see that these people are allowed to 230 ** talk to each other. 231 */ 232 233 if (!checkcompat(to)) 234 { 235 giveresponse(EX_UNAVAILABLE, TRUE, m); 236 continue; 237 } 238 239 /* 240 ** Strip quote bits from names if the mailer is dumb 241 ** about them. 242 */ 243 244 if (bitset(M_STRIPQ, m->m_flags)) 245 { 246 stripquotes(user, TRUE); 247 stripquotes(host, TRUE); 248 } 249 else 250 { 251 stripquotes(user, FALSE); 252 stripquotes(host, FALSE); 253 } 254 255 /* 256 ** Pass it to the other host if we are running SMTP. 257 */ 258 259 if (clever) 260 { 261 # ifdef SMTP 262 i = smtprcpt(to); 263 if (i != EX_OK) 264 { 265 # ifdef QUEUE 266 if (i == EX_TEMPFAIL) 267 { 268 QueueUp = TRUE; 269 to->q_flags |= QQUEUEUP; 270 } 271 else 272 # endif QUEUE 273 { 274 to->q_flags |= QBADADDR; 275 giveresponse(i, TRUE, m); 276 } 277 } 278 # else SMTP 279 syserr("trying to be clever"); 280 # endif SMTP 281 } 282 283 /* 284 ** If an error message has already been given, don't 285 ** bother to send to this address. 286 ** 287 ** >>>>>>>>>> This clause assumes that the local mailer 288 ** >> NOTE >> cannot do any further aliasing; that 289 ** >>>>>>>>>> function is subsumed by sendmail. 290 */ 291 292 if (bitset(QBADADDR, to->q_flags)) 293 continue; 294 295 /* save statistics.... */ 296 Stat.stat_nt[to->q_mailer->m_mno]++; 297 Stat.stat_bt[to->q_mailer->m_mno] += kbytes(MsgSize); 298 299 /* 300 ** See if this user name is "special". 301 ** If the user name has a slash in it, assume that this 302 ** is a file -- send it off without further ado. 303 ** Note that this means that editfcn's will not 304 ** be applied to the message. Also note that 305 ** this type of addresses is not processed along 306 ** with the others, so we fudge on the To person. 307 */ 308 309 if (m == LocalMailer) 310 { 311 if (user[0] == '/') 312 { 313 i = mailfile(user, getctladdr(to)); 314 giveresponse(i, TRUE, m); 315 continue; 316 } 317 } 318 319 /* 320 ** Address is verified -- add this user to mailer 321 ** argv, and add it to the print list of recipients. 322 */ 323 324 /* link together the chain of recipients */ 325 to->q_tchain = tochain; 326 tochain = to; 327 328 /* create list of users for error messages */ 329 if (tobuf[0] != '\0') 330 (void) strcat(tobuf, ","); 331 (void) strcat(tobuf, to->q_paddr); 332 define('u', user); /* to user */ 333 define('z', to->q_home); /* user's home */ 334 335 /* 336 ** Expand out this user into argument list. 337 */ 338 339 if (!clever) 340 { 341 (void) expand(*mvp, buf, &buf[sizeof buf - 1]); 342 *pvp++ = newstr(buf); 343 if (pvp >= &pv[MAXPV - 2]) 344 { 345 /* allow some space for trailing parms */ 346 break; 347 } 348 } 349 } 350 351 /* see if any addresses still exist */ 352 if (tobuf[0] == '\0') 353 { 354 # ifdef SMTP 355 if (clever) 356 smtpquit(pv[0]); 357 # endif SMTP 358 return (0); 359 } 360 361 /* print out messages as full list */ 362 To = tobuf; 363 364 /* 365 ** Fill out any parameters after the $u parameter. 366 */ 367 368 while (!clever && *++mvp != NULL) 369 { 370 (void) expand(*mvp, buf, &buf[sizeof buf - 1]); 371 *pvp++ = newstr(buf); 372 if (pvp >= &pv[MAXPV]) 373 syserr("deliver: pv overflow after $u for %s", pv[0]); 374 } 375 *pvp++ = NULL; 376 377 /* 378 ** Call the mailer. 379 ** The argument vector gets built, pipes 380 ** are created as necessary, and we fork & exec as 381 ** appropriate. 382 ** If we are running SMTP, we just need to clean up. 383 */ 384 385 if (editfcn == NULL) 386 editfcn = putmessage; 387 if (ctladdr == NULL) 388 ctladdr = &From; 389 # ifdef SMTP 390 if (clever) 391 { 392 i = smtpfinish(m, editfcn); 393 smtpquit(pv[0]); 394 } 395 else 396 # endif SMTP 397 i = sendoff(m, pv, editfcn, ctladdr); 398 399 /* 400 ** If we got a temporary failure, arrange to queue the 401 ** addressees. 402 */ 403 404 # ifdef QUEUE 405 if (i == EX_TEMPFAIL) 406 { 407 QueueUp = TRUE; 408 for (to = tochain; to != NULL; to = to->q_tchain) 409 to->q_flags |= QQUEUEUP; 410 } 411 # endif QUEUE 412 413 errno = 0; 414 return (i); 415 } 416 /* 417 ** DOFORK -- do a fork, retrying a couple of times on failure. 418 ** 419 ** This MUST be a macro, since after a vfork we are running 420 ** two processes on the same stack!!! 421 ** 422 ** Parameters: 423 ** none. 424 ** 425 ** Returns: 426 ** From a macro??? You've got to be kidding! 427 ** 428 ** Side Effects: 429 ** Modifies the ==> LOCAL <== variable 'pid', leaving: 430 ** pid of child in parent, zero in child. 431 ** -1 on unrecoverable error. 432 ** 433 ** Notes: 434 ** I'm awfully sorry this looks so awful. That's 435 ** vfork for you..... 436 */ 437 438 # define NFORKTRIES 5 439 # ifdef VFORK 440 # define XFORK vfork 441 # else VFORK 442 # define XFORK fork 443 # endif VFORK 444 445 # define DOFORK(fORKfN) \ 446 {\ 447 register int i;\ 448 \ 449 for (i = NFORKTRIES; i-- > 0; )\ 450 {\ 451 pid = fORKfN();\ 452 if (pid >= 0)\ 453 break;\ 454 sleep((unsigned) NFORKTRIES - i);\ 455 }\ 456 } 457 /* 458 ** DOFORK -- simple fork interface to DOFORK. 459 ** 460 ** Parameters: 461 ** none. 462 ** 463 ** Returns: 464 ** pid of child in parent. 465 ** zero in child. 466 ** -1 on error. 467 ** 468 ** Side Effects: 469 ** returns twice, once in parent and once in child. 470 */ 471 472 dofork() 473 { 474 register int pid; 475 476 DOFORK(fork); 477 return (pid); 478 } 479 /* 480 ** SENDOFF -- send off call to mailer & collect response. 481 ** 482 ** Parameters: 483 ** m -- mailer descriptor. 484 ** pvp -- parameter vector to send to it. 485 ** editfcn -- function to pipe it through. 486 ** ctladdr -- an address pointer controlling the 487 ** user/groupid etc. of the mailer. 488 ** 489 ** Returns: 490 ** exit status of mailer. 491 ** 492 ** Side Effects: 493 ** none. 494 */ 495 496 sendoff(m, pvp, editfcn, ctladdr) 497 struct mailer *m; 498 char **pvp; 499 int (*editfcn)(); 500 ADDRESS *ctladdr; 501 { 502 auto FILE *mfile; 503 auto FILE *rfile; 504 register int i; 505 extern putmessage(); 506 int pid; 507 508 /* 509 ** Create connection to mailer. 510 */ 511 512 pid = openmailer(m, pvp, ctladdr, FALSE, &mfile, &rfile); 513 if (pid < 0) 514 return (-1); 515 516 /* 517 ** Format and send message. 518 */ 519 520 (void) signal(SIGPIPE, SIG_IGN); 521 if (editfcn == NULL) 522 editfcn = putmessage; 523 524 (*editfcn)(mfile, m, FALSE); 525 (void) fclose(mfile); 526 527 i = endmailer(pid, pvp[0]); 528 giveresponse(i, TRUE, m); 529 530 /* arrange a return receipt if requested */ 531 if (RetReceipt && bitset(M_LOCAL, m->m_flags) && i == EX_OK) 532 { 533 SendReceipt = TRUE; 534 fprintf(Xscript, "%s... successfully delivered\n", To); 535 /* do we want to send back more info? */ 536 } 537 538 return (i); 539 } 540 /* 541 ** ENDMAILER -- Wait for mailer to terminate. 542 ** 543 ** We should never get fatal errors (e.g., segmentation 544 ** violation), so we report those specially. For other 545 ** errors, we choose a status message (into statmsg), 546 ** and if it represents an error, we print it. 547 ** 548 ** Parameters: 549 ** pid -- pid of mailer. 550 ** name -- name of mailer (for error messages). 551 ** 552 ** Returns: 553 ** exit code of mailer. 554 ** 555 ** Side Effects: 556 ** none. 557 */ 558 559 endmailer(pid, name) 560 int pid; 561 char *name; 562 { 563 register int i; 564 auto int st; 565 566 /* in the IPC case there is nothing to wait for */ 567 if (pid == 0) 568 return (EX_OK); 569 570 /* wait for the mailer process to die and collect status */ 571 while ((i = wait(&st)) > 0 && i != pid) 572 continue; 573 if (i < 0) 574 { 575 syserr("wait"); 576 return (-1); 577 } 578 579 /* see if it died a horrid death */ 580 if ((st & 0377) != 0) 581 { 582 syserr("%s: stat %o", name, st); 583 ExitStat = EX_UNAVAILABLE; 584 return (-1); 585 } 586 587 /* normal death -- return status */ 588 i = (st >> 8) & 0377; 589 return (i); 590 } 591 /* 592 ** OPENMAILER -- open connection to mailer. 593 ** 594 ** Parameters: 595 ** m -- mailer descriptor. 596 ** pvp -- parameter vector to pass to mailer. 597 ** ctladdr -- controlling address for user. 598 ** clever -- create a full duplex connection. 599 ** pmfile -- pointer to mfile (to mailer) connection. 600 ** prfile -- pointer to rfile (from mailer) connection. 601 ** 602 ** Returns: 603 ** pid of mailer ( > 0 ). 604 ** -1 on error. 605 ** zero on an IPC connection. 606 ** 607 ** Side Effects: 608 ** creates a mailer in a subprocess. 609 */ 610 611 openmailer(m, pvp, ctladdr, clever, pmfile, prfile) 612 struct mailer *m; 613 char **pvp; 614 ADDRESS *ctladdr; 615 bool clever; 616 FILE **pmfile; 617 FILE **prfile; 618 { 619 int pid; 620 int mpvect[2]; 621 int rpvect[2]; 622 FILE *mfile; 623 FILE *rfile; 624 extern FILE *fdopen(); 625 626 # ifdef DEBUG 627 if (Debug) 628 { 629 printf("openmailer:\n"); 630 printav(pvp); 631 } 632 # endif DEBUG 633 errno = 0; 634 635 # ifdef DAEMON 636 /* 637 ** Deal with the special case of mail handled through an IPC 638 ** connection. 639 ** In this case we don't actually fork. We must be 640 ** running SMTP for this to work. We will return a 641 ** zero pid to indicate that we are running IPC. 642 */ 643 644 if (strcmp(m->m_mailer, "[IPC]") == 0) 645 { 646 register int i; 647 648 if (!clever) 649 syserr("non-clever IPC"); 650 i = makeconnection(pvp[1], pmfile, prfile); 651 if (i != EX_OK) 652 { 653 ExitStat = i; 654 return (-1); 655 } 656 else 657 return (0); 658 } 659 # endif DAEMON 660 661 /* create a pipe to shove the mail through */ 662 if (pipe(mpvect) < 0) 663 { 664 syserr("pipe (to mailer)"); 665 return (-1); 666 } 667 668 # ifdef SMTP 669 /* if this mailer speaks smtp, create a return pipe */ 670 if (clever && pipe(rpvect) < 0) 671 { 672 syserr("pipe (from mailer)"); 673 (void) close(mpvect[0]); 674 (void) close(mpvect[1]); 675 return (-1); 676 } 677 # endif SMTP 678 679 /* 680 ** Actually fork the mailer process. 681 ** DOFORK is clever about retrying. 682 */ 683 684 DOFORK(XFORK); 685 /* pid is set by DOFORK */ 686 if (pid < 0) 687 { 688 /* failure */ 689 syserr("Cannot fork"); 690 (void) close(mpvect[0]); 691 (void) close(mpvect[1]); 692 if (clever) 693 { 694 (void) close(rpvect[0]); 695 (void) close(rpvect[1]); 696 } 697 return (-1); 698 } 699 else if (pid == 0) 700 { 701 /* child -- set up input & exec mailer */ 702 /* make diagnostic output be standard output */ 703 (void) signal(SIGINT, SIG_IGN); 704 (void) signal(SIGHUP, SIG_IGN); 705 (void) signal(SIGTERM, SIG_DFL); 706 707 /* arrange to filter standard & diag output of command */ 708 if (clever) 709 { 710 (void) close(rpvect[0]); 711 (void) close(1); 712 (void) dup(rpvect[1]); 713 (void) close(rpvect[1]); 714 } 715 else if (OutChannel != stdout) 716 { 717 (void) close(1); 718 (void) dup(fileno(OutChannel)); 719 } 720 (void) close(2); 721 (void) dup(1); 722 723 /* arrange to get standard input */ 724 (void) close(mpvect[1]); 725 (void) close(0); 726 if (dup(mpvect[0]) < 0) 727 { 728 syserr("Cannot dup to zero!"); 729 _exit(EX_OSERR); 730 } 731 (void) close(mpvect[0]); 732 if (!bitset(M_RESTR, m->m_flags)) 733 { 734 if (ctladdr->q_uid == 0) 735 { 736 (void) setgid(DefGid); 737 (void) setuid(DefUid); 738 } 739 else 740 { 741 (void) setgid(ctladdr->q_gid); 742 (void) setuid(ctladdr->q_uid); 743 } 744 } 745 # ifndef VFORK 746 /* 747 ** We have to be careful with vfork - we can't mung up the 748 ** memory but we don't want the mailer to inherit any extra 749 ** open files. Chances are the mailer won't 750 ** care about an extra file, but then again you never know. 751 ** Actually, we would like to close(fileno(pwf)), but it's 752 ** declared static so we can't. But if we fclose(pwf), which 753 ** is what endpwent does, it closes it in the parent too and 754 ** the next getpwnam will be slower. If you have a weird 755 ** mailer that chokes on the extra file you should do the 756 ** endpwent(). 757 ** 758 ** Similar comments apply to log. However, openlog is 759 ** clever enough to set the FIOCLEX mode on the file, 760 ** so it will be closed automatically on the exec. 761 */ 762 763 endpwent(); 764 # ifdef LOG 765 closelog(); 766 # endif LOG 767 # endif VFORK 768 769 /* try to execute the mailer */ 770 execv(m->m_mailer, pvp); 771 772 /* syserr fails because log is closed */ 773 /* syserr("Cannot exec %s", m->m_mailer); */ 774 printf("Cannot exec '%s' errno=%d\n", m->m_mailer, errno); 775 (void) fflush(stdout); 776 _exit(EX_UNAVAILABLE); 777 } 778 779 /* 780 ** Set up return value. 781 */ 782 783 (void) close(mpvect[0]); 784 mfile = fdopen(mpvect[1], "w"); 785 if (clever) 786 { 787 (void) close(rpvect[1]); 788 rfile = fdopen(rpvect[0], "r"); 789 } 790 791 *pmfile = mfile; 792 *prfile = rfile; 793 794 return (pid); 795 } 796 /* 797 ** GIVERESPONSE -- Interpret an error response from a mailer 798 ** 799 ** Parameters: 800 ** stat -- the status code from the mailer (high byte 801 ** only; core dumps must have been taken care of 802 ** already). 803 ** force -- if set, force an error message output, even 804 ** if the mailer seems to like to print its own 805 ** messages. 806 ** m -- the mailer descriptor for this mailer. 807 ** 808 ** Returns: 809 ** none. 810 ** 811 ** Side Effects: 812 ** Errors may be incremented. 813 ** ExitStat may be set. 814 */ 815 816 giveresponse(stat, force, m) 817 int stat; 818 int force; 819 register struct mailer *m; 820 { 821 register char *statmsg; 822 extern char *SysExMsg[]; 823 register int i; 824 extern int N_SysEx; 825 char buf[30]; 826 827 /* 828 ** Compute status message from code. 829 */ 830 831 i = stat - EX__BASE; 832 if (i < 0 || i > N_SysEx) 833 statmsg = NULL; 834 else 835 statmsg = SysExMsg[i]; 836 if (stat == 0) 837 { 838 if (bitset(M_LOCAL, m->m_flags)) 839 statmsg = "delivered"; 840 else 841 statmsg = "queued"; 842 if (Verbose) 843 message(Arpa_Info, statmsg); 844 } 845 # ifdef QUEUE 846 else if (stat == EX_TEMPFAIL) 847 { 848 if (Verbose) 849 message(Arpa_Info, "transmission deferred"); 850 } 851 # endif QUEUE 852 else 853 { 854 Errors++; 855 FatalErrors = TRUE; 856 if (statmsg == NULL && m->m_badstat != 0) 857 { 858 stat = m->m_badstat; 859 i = stat - EX__BASE; 860 # ifdef DEBUG 861 if (i < 0 || i >= N_SysEx) 862 syserr("Bad m_badstat %d", stat); 863 else 864 # endif DEBUG 865 statmsg = SysExMsg[i]; 866 } 867 if (statmsg == NULL) 868 usrerr("unknown mailer response %d", stat); 869 else if (force || !bitset(M_QUIET, m->m_flags) || Verbose) 870 usrerr("%s", statmsg); 871 } 872 873 /* 874 ** Final cleanup. 875 ** Log a record of the transaction. Compute the new 876 ** ExitStat -- if we already had an error, stick with 877 ** that. 878 */ 879 880 if (statmsg == NULL) 881 { 882 (void) sprintf(buf, "error %d", stat); 883 statmsg = buf; 884 } 885 886 # ifdef LOG 887 syslog(LOG_INFO, "%s->%s: %ld: %s", From.q_paddr, To, MsgSize, statmsg); 888 # endif LOG 889 # ifdef QUEUE 890 if (stat != EX_TEMPFAIL) 891 # endif QUEUE 892 setstat(stat); 893 } 894 /* 895 ** PUTMESSAGE -- output a message to the final mailer. 896 ** 897 ** This routine takes care of recreating the header from the 898 ** in-core copy, etc. 899 ** 900 ** Parameters: 901 ** fp -- file to output onto. 902 ** m -- a mailer descriptor. 903 ** xdot -- if set, hide lines beginning with dot. 904 ** 905 ** Returns: 906 ** none. 907 ** 908 ** Side Effects: 909 ** The message is written onto fp. 910 */ 911 912 putmessage(fp, m, xdot) 913 FILE *fp; 914 struct mailer *m; 915 bool xdot; 916 { 917 char buf[BUFSIZ]; 918 919 /* 920 ** Output "From" line unless supressed 921 ** 922 ** >>>>>>>>>> One of the ugliest hacks seen by human eyes is 923 ** >>>>>>>>>> contained herein: UUCP wants those stupid 924 ** >> NOTE >> "remote from <host>" lines. Why oh why does a 925 ** >>>>>>>>>> well-meaning programmer such as myself have to 926 ** >>>>>>>>>> deal with this kind of antique garbage???? 927 */ 928 929 if (!bitset(M_NHDR, m->m_flags)) 930 { 931 # ifdef UGLYUUCP 932 if (bitset(M_UGLYUUCP, m->m_flags)) 933 { 934 extern char *macvalue(); 935 char *sys = macvalue('g'); 936 char *bang = index(sys, '!'); 937 938 if (bang == NULL) 939 syserr("No ! in UUCP! (%s)", sys); 940 else 941 *bang = '\0'; 942 (void) expand("From $f $d remote from $g", buf, 943 &buf[sizeof buf - 1]); 944 *bang = '!'; 945 } 946 else 947 # endif UGLYUUCP 948 (void) expand("$l", buf, &buf[sizeof buf - 1]); 949 fprintf(fp, "%s\n", buf); 950 } 951 952 /* 953 ** Output all header lines 954 */ 955 956 putheader(fp, m); 957 958 /* 959 ** Output the body of the message 960 */ 961 962 if (TempFile != NULL) 963 { 964 rewind(TempFile); 965 while (!ferror(fp) && fgets(buf, sizeof buf, TempFile) != NULL) 966 fprintf(fp, "%s%s", xdot && buf[0] == '.' ? "." : "", buf); 967 968 if (ferror(TempFile)) 969 { 970 syserr("putmessage: read error"); 971 ExitStat = EX_IOERR; 972 } 973 } 974 975 (void) fflush(fp); 976 if (ferror(fp) && errno != EPIPE) 977 { 978 syserr("putmessage: write error"); 979 ExitStat = EX_IOERR; 980 } 981 errno = 0; 982 } 983 /* 984 ** PUTHEADER -- put the header part of a message 985 ** 986 ** Parameters: 987 ** fp -- file to put it on. 988 ** m -- mailer to use. 989 ** 990 ** Returns: 991 ** none. 992 ** 993 ** Side Effects: 994 ** none. 995 */ 996 997 putheader(fp, m) 998 register FILE *fp; 999 register struct mailer *m; 1000 { 1001 char buf[BUFSIZ]; 1002 register HDR *h; 1003 extern char *arpadate(); 1004 bool anyheader = FALSE; 1005 extern char *capitalize(); 1006 extern char *hvalue(); 1007 extern bool samefrom(); 1008 char *of_line; 1009 1010 of_line = hvalue("original-from"); 1011 for (h = Header; h != NULL; h = h->h_link) 1012 { 1013 register char *p; 1014 char *origfrom = OrigFrom; 1015 bool nooutput; 1016 1017 nooutput = FALSE; 1018 if (bitset(H_CHECK|H_ACHECK, h->h_flags) && !bitset(h->h_mflags, m->m_flags)) 1019 nooutput = TRUE; 1020 1021 /* use From: line from message if generated is the same */ 1022 if (strcmp(h->h_field, "from") == 0 && origfrom != NULL && 1023 strcmp(m->m_from, "$f") == 0 && of_line == NULL) 1024 { 1025 p = origfrom; 1026 origfrom = NULL; 1027 } 1028 else if (bitset(H_DEFAULT, h->h_flags)) 1029 { 1030 (void) expand(h->h_value, buf, &buf[sizeof buf]); 1031 p = buf; 1032 } 1033 else if (bitset(H_ADDR, h->h_flags)) 1034 { 1035 register int opos; 1036 bool firstone = TRUE; 1037 1038 /* 1039 ** Output the address list translated by the 1040 ** mailer and with commas. 1041 */ 1042 1043 p = h->h_value; 1044 if (p == NULL || *p == '\0' || nooutput) 1045 continue; 1046 fprintf(fp, "%s: ", capitalize(h->h_field)); 1047 opos = strlen(h->h_field) + 2; 1048 while (*p != '\0') 1049 { 1050 register char *name = p; 1051 extern char *remotename(); 1052 char savechar; 1053 1054 /* find the end of the name */ 1055 while (*p != '\0' && *p != ',') 1056 { 1057 extern bool isatword(); 1058 char *oldp; 1059 1060 if (!OldStyle || !isspace(*p)) 1061 { 1062 p++; 1063 continue; 1064 } 1065 oldp = p; 1066 while (*p != '\0' && isspace(*p)) 1067 p++; 1068 if (*p != '@' && !isatword(p)) 1069 { 1070 p = oldp; 1071 break; 1072 } 1073 p += *p == '@' ? 1 : 2; 1074 while (*p != '\0' && isspace(*p)) 1075 p++; 1076 } 1077 savechar = *p; 1078 *p = '\0'; 1079 1080 /* translate the name to be relative */ 1081 name = remotename(name, m); 1082 if (*name == '\0') 1083 continue; 1084 1085 /* output the name with nice formatting */ 1086 opos += strlen(name); 1087 if (!firstone) 1088 opos += 2; 1089 if (opos > 78 && !firstone) 1090 { 1091 fprintf(fp, ",\n "); 1092 opos = 8 + strlen(name); 1093 } 1094 else if (!firstone) 1095 fprintf(fp, ", "); 1096 fprintf(fp, "%s", name); 1097 firstone = FALSE; 1098 1099 /* clean up the source string */ 1100 *p = savechar; 1101 while (*p != '\0' && (isspace(*p) || *p == ',')) 1102 p++; 1103 } 1104 fprintf(fp, "\n"); 1105 nooutput = TRUE; 1106 } 1107 else 1108 p = h->h_value; 1109 if (p == NULL || *p == '\0') 1110 continue; 1111 1112 /* hack, hack -- output Original-From field if different */ 1113 if (strcmp(h->h_field, "from") == 0 && origfrom != NULL) 1114 { 1115 /* output new Original-From line if needed */ 1116 if (of_line == NULL && !samefrom(p, origfrom)) 1117 { 1118 fprintf(fp, "Original-From: %s\n", origfrom); 1119 anyheader = TRUE; 1120 } 1121 if (of_line != NULL && !nooutput && samefrom(p, of_line)) 1122 { 1123 /* delete Original-From: line if redundant */ 1124 p = of_line; 1125 of_line = NULL; 1126 } 1127 } 1128 else if (strcmp(h->h_field, "original-from") == 0 && of_line == NULL) 1129 nooutput = TRUE; 1130 1131 /* finally, output the header line */ 1132 if (!nooutput) 1133 { 1134 fprintf(fp, "%s: %s\n", capitalize(h->h_field), p); 1135 h->h_flags |= H_USED; 1136 anyheader = TRUE; 1137 } 1138 } 1139 if (anyheader) 1140 fprintf(fp, "\n"); 1141 } 1142 /* 1143 ** ISATWORD -- tell if the word we are pointing to is "at". 1144 ** 1145 ** Parameters: 1146 ** p -- word to check. 1147 ** 1148 ** Returns: 1149 ** TRUE -- if p is the word at. 1150 ** FALSE -- otherwise. 1151 ** 1152 ** Side Effects: 1153 ** none. 1154 */ 1155 1156 bool 1157 isatword(p) 1158 register char *p; 1159 { 1160 extern char lower(); 1161 1162 if (lower(p[0]) == 'a' && lower(p[1]) == 't' && 1163 p[2] != '\0' && isspace(p[2])) 1164 return (TRUE); 1165 return (FALSE); 1166 } 1167 /* 1168 ** REMOTENAME -- return the name relative to the current mailer 1169 ** 1170 ** Parameters: 1171 ** name -- the name to translate. 1172 ** 1173 ** Returns: 1174 ** the text string representing this address relative to 1175 ** the receiving mailer. 1176 ** 1177 ** Side Effects: 1178 ** none. 1179 ** 1180 ** Warnings: 1181 ** The text string returned is tucked away locally; 1182 ** copy it if you intend to save it. 1183 */ 1184 1185 char * 1186 remotename(name, m) 1187 char *name; 1188 struct mailer *m; 1189 { 1190 # ifdef NOTDEF 1191 static char buf[MAXNAME]; 1192 char lbuf[MAXNAME]; 1193 extern char *macvalue(); 1194 char *oldf = macvalue('f'); 1195 char *oldx = macvalue('x'); 1196 char *oldg = macvalue('g'); 1197 extern char **prescan(); 1198 register char **pvp; 1199 extern char *getxpart(); 1200 1201 /* 1202 ** Do general rewriting of name. 1203 ** This will also take care of doing global name translation. 1204 */ 1205 1206 define('x', getxpart(name)); 1207 pvp = prescan(name, '\0'); 1208 for (;;) 1209 { 1210 rewrite(pvp, 1); 1211 rewrite(pvp, 3); 1212 if (**pvp == CANONNET) 1213 { 1214 auto ADDRESS a; 1215 register char *p; 1216 extern char *hostalias(); 1217 1218 /* oops... resolved to something */ 1219 if (buildaddr(pvp, &a) == NULL) 1220 return (name); 1221 p = hostalias(&a); 1222 if (p == NULL) 1223 return (name); 1224 pvp = prescan(p, '\0'); 1225 } 1226 else 1227 { 1228 cataddr(pvp, lbuf, sizeof lbuf); 1229 break; 1230 } 1231 } 1232 1233 /* make the name relative to the receiving mailer */ 1234 define('f', lbuf); 1235 (void) expand(m->m_from, buf, &buf[sizeof buf - 1]); 1236 1237 /* rewrite to get rid of garbage we added in the expand above */ 1238 pvp = prescan(buf, '\0'); 1239 rewrite(pvp, 2); 1240 cataddr(pvp, lbuf, sizeof lbuf); 1241 1242 /* now add any comment info we had before back */ 1243 define('g', lbuf); 1244 (void) expand("$q", buf, &buf[sizeof buf - 1]); 1245 1246 define('f', oldf); 1247 define('g', oldg); 1248 define('x', oldx); 1249 1250 # ifdef DEBUG 1251 if (Debug > 0) 1252 printf("remotename(%s) => `%s'\n", name, buf); 1253 # endif DEBUG 1254 return (buf); 1255 # else NOTDEF 1256 /* oh bother, this breaks UUCP...... */ 1257 return (name); 1258 # endif NOTDEF 1259 } 1260 /* 1261 ** SAMEFROM -- tell if two text addresses represent the same from address. 1262 ** 1263 ** Parameters: 1264 ** ifrom -- internally generated form of from address. 1265 ** efrom -- external form of from address. 1266 ** 1267 ** Returns: 1268 ** TRUE -- if they convey the same info. 1269 ** FALSE -- if any information has been lost. 1270 ** 1271 ** Side Effects: 1272 ** none. 1273 */ 1274 1275 bool 1276 samefrom(ifrom, efrom) 1277 char *ifrom; 1278 char *efrom; 1279 { 1280 register char *p; 1281 char buf[MAXNAME + 4]; 1282 1283 # ifdef DEBUG 1284 if (Debug > 7) 1285 printf("samefrom(%s,%s)-->", ifrom, efrom); 1286 # endif DEBUG 1287 if (strcmp(ifrom, efrom) == 0) 1288 goto success; 1289 p = index(ifrom, '@'); 1290 if (p == NULL) 1291 goto failure; 1292 *p = '\0'; 1293 strcpy(buf, ifrom); 1294 strcat(buf, " at "); 1295 *p++ = '@'; 1296 strcat(buf, p); 1297 if (strcmp(buf, efrom) == 0) 1298 goto success; 1299 1300 failure: 1301 # ifdef DEBUG 1302 if (Debug > 7) 1303 printf("FALSE\n"); 1304 # endif DEBUG 1305 return (FALSE); 1306 1307 success: 1308 # ifdef DEBUG 1309 if (Debug > 7) 1310 printf("TRUE\n"); 1311 # endif DEBUG 1312 return (TRUE); 1313 } 1314 /* 1315 ** MAILFILE -- Send a message to a file. 1316 ** 1317 ** If the file has the setuid/setgid bits set, but NO execute 1318 ** bits, sendmail will try to become the owner of that file 1319 ** rather than the real user. Obviously, this only works if 1320 ** sendmail runs as root. 1321 ** 1322 ** Parameters: 1323 ** filename -- the name of the file to send to. 1324 ** ctladdr -- the controlling address header -- includes 1325 ** the userid/groupid to be when sending. 1326 ** 1327 ** Returns: 1328 ** The exit code associated with the operation. 1329 ** 1330 ** Side Effects: 1331 ** none. 1332 */ 1333 1334 mailfile(filename, ctladdr) 1335 char *filename; 1336 ADDRESS *ctladdr; 1337 { 1338 register FILE *f; 1339 register int pid; 1340 1341 /* 1342 ** Fork so we can change permissions here. 1343 ** Note that we MUST use fork, not vfork, because of 1344 ** the complications of calling subroutines, etc. 1345 */ 1346 1347 DOFORK(fork); 1348 1349 if (pid < 0) 1350 return (EX_OSERR); 1351 else if (pid == 0) 1352 { 1353 /* child -- actually write to file */ 1354 struct stat stb; 1355 1356 (void) signal(SIGINT, SIG_DFL); 1357 (void) signal(SIGHUP, SIG_DFL); 1358 (void) signal(SIGTERM, SIG_DFL); 1359 umask(OldUmask); 1360 if (stat(filename, &stb) < 0) 1361 stb.st_mode = 0666; 1362 if (bitset(0111, stb.st_mode)) 1363 exit(EX_CANTCREAT); 1364 if (ctladdr == NULL) 1365 ctladdr = &From; 1366 if (!bitset(S_ISGID, stb.st_mode) || setgid(stb.st_gid) < 0) 1367 { 1368 if (ctladdr->q_uid == 0) 1369 (void) setgid(DefGid); 1370 else 1371 (void) setgid(ctladdr->q_gid); 1372 } 1373 if (!bitset(S_ISUID, stb.st_mode) || setuid(stb.st_uid) < 0) 1374 { 1375 if (ctladdr->q_uid == 0) 1376 (void) setuid(DefUid); 1377 else 1378 (void) setuid(ctladdr->q_uid); 1379 } 1380 f = fopen(filename, "a"); 1381 if (f == NULL) 1382 exit(EX_CANTCREAT); 1383 1384 putmessage(f, Mailer[1], FALSE); 1385 fputs("\n", f); 1386 (void) fclose(f); 1387 (void) fflush(stdout); 1388 1389 /* reset ISUID & ISGID bits */ 1390 (void) chmod(filename, (int) stb.st_mode); 1391 exit(EX_OK); 1392 /*NOTREACHED*/ 1393 } 1394 else 1395 { 1396 /* parent -- wait for exit status */ 1397 register int i; 1398 auto int stat; 1399 1400 while ((i = wait(&stat)) != pid) 1401 { 1402 if (i < 0) 1403 { 1404 stat = EX_OSERR << 8; 1405 break; 1406 } 1407 } 1408 if ((stat & 0377) != 0) 1409 stat = EX_UNAVAILABLE << 8; 1410 return ((stat >> 8) & 0377); 1411 } 1412 } 1413 /* 1414 ** SENDALL -- actually send all the messages. 1415 ** 1416 ** Parameters: 1417 ** verifyonly -- if set, only give verification messages. 1418 ** 1419 ** Returns: 1420 ** none. 1421 ** 1422 ** Side Effects: 1423 ** Scans the send lists and sends everything it finds. 1424 */ 1425 1426 sendall(verifyonly) 1427 bool verifyonly; 1428 { 1429 register ADDRESS *q; 1430 typedef int (*fnptr)(); 1431 1432 # ifdef DEBUG 1433 if (Debug > 1) 1434 { 1435 printf("\nSendQueue:\n"); 1436 printaddr(SendQueue, TRUE); 1437 } 1438 # endif DEBUG 1439 1440 for (q = SendQueue; q != NULL; q = q->q_next) 1441 { 1442 if (verifyonly) 1443 { 1444 To = q->q_paddr; 1445 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1446 { 1447 if (bitset(M_LOCAL, q->q_mailer->m_flags)) 1448 message(Arpa_Info, "deliverable"); 1449 else 1450 message(Arpa_Info, "queueable"); 1451 } 1452 } 1453 else 1454 (void) deliver(q, (fnptr) NULL); 1455 } 1456 } 1457