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 3.70 03/05/82); 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 i = smtpinit(m, pv, (ADDRESS *) NULL); 172 giveresponse(i, TRUE, m); 173 # ifdef QUEUE 174 if (i == EX_TEMPFAIL) 175 { 176 QueueUp = TRUE; 177 tempfail = TRUE; 178 } 179 # endif QUEUE 180 # else SMTP 181 /* oops! we don't implement SMTP */ 182 syserr("SMTP style mailer"); 183 return (EX_SOFTWARE); 184 # endif SMTP 185 } 186 187 /* 188 ** At this point *mvp points to the argument with $u. We 189 ** run through our address list and append all the addresses 190 ** we can. If we run out of space, do not fret! We can 191 ** always send another copy later. 192 */ 193 194 tobuf[0] = '\0'; 195 To = tobuf; 196 ctladdr = NULL; 197 for (; to != NULL; to = to->q_next) 198 { 199 /* avoid sending multiple recipients to dumb mailers */ 200 if (tobuf[0] != '\0' && !bitset(M_MUSER, m->m_flags)) 201 break; 202 203 /* if already sent or not for this host, don't send */ 204 if ((!ForceMail && bitset(QDONTSEND, to->q_flags)) || 205 strcmp(to->q_host, host) != 0 || to->q_mailer != firstto->q_mailer) 206 continue; 207 208 # ifdef DEBUG 209 if (Debug) 210 { 211 printf("\nsend to "); 212 printaddr(to, FALSE); 213 } 214 # endif DEBUG 215 216 /* link together the chain of recipients */ 217 if (!bitset(QDONTSEND, to->q_flags)) 218 { 219 to->q_tchain = tochain; 220 tochain = to; 221 } 222 223 /* compute effective uid/gid when sending */ 224 if (to->q_mailer == ProgMailer) 225 ctladdr = getctladdr(to); 226 227 user = to->q_user; 228 To = to->q_paddr; 229 to->q_flags |= QDONTSEND; 230 if (tempfail) 231 { 232 to->q_flags |= QQUEUEUP; 233 continue; 234 } 235 236 /* 237 ** Check to see that these people are allowed to 238 ** talk to each other. 239 */ 240 241 if (!checkcompat(to)) 242 { 243 giveresponse(EX_UNAVAILABLE, TRUE, m); 244 continue; 245 } 246 247 /* 248 ** Strip quote bits from names if the mailer is dumb 249 ** about them. 250 */ 251 252 if (bitset(M_STRIPQ, m->m_flags)) 253 { 254 stripquotes(user, TRUE); 255 stripquotes(host, TRUE); 256 } 257 else 258 { 259 stripquotes(user, FALSE); 260 stripquotes(host, FALSE); 261 } 262 263 /* 264 ** If an error message has already been given, don't 265 ** bother to send to this address. 266 ** 267 ** >>>>>>>>>> This clause assumes that the local mailer 268 ** >> NOTE >> cannot do any further aliasing; that 269 ** >>>>>>>>>> function is subsumed by sendmail. 270 */ 271 272 if (bitset(QBADADDR, to->q_flags)) 273 continue; 274 275 /* save statistics.... */ 276 Stat.stat_nt[to->q_mailer->m_mno]++; 277 Stat.stat_bt[to->q_mailer->m_mno] += kbytes(MsgSize); 278 279 /* 280 ** See if this user name is "special". 281 ** If the user name has a slash in it, assume that this 282 ** is a file -- send it off without further ado. 283 ** Note that this means that editfcn's will not 284 ** be applied to the message. Also note that 285 ** this type of addresses is not processed along 286 ** with the others, so we fudge on the To person. 287 */ 288 289 if (m == LocalMailer) 290 { 291 if (user[0] == '/') 292 { 293 i = mailfile(user, getctladdr(to)); 294 giveresponse(i, TRUE, m); 295 continue; 296 } 297 } 298 299 /* 300 ** Address is verified -- add this user to mailer 301 ** argv, and add it to the print list of recipients. 302 */ 303 304 /* create list of users for error messages */ 305 if (tobuf[0] != '\0') 306 (void) strcat(tobuf, ","); 307 (void) strcat(tobuf, to->q_paddr); 308 define('u', user); /* to user */ 309 define('z', to->q_home); /* user's home */ 310 311 /* 312 ** Expand out this user into argument list or 313 ** send it to our SMTP server. 314 */ 315 316 if (clever) 317 { 318 # ifdef SMTP 319 i = smtprcpt(to); 320 if (i != EX_OK) 321 { 322 # ifdef QUEUE 323 if (i == EX_TEMPFAIL) 324 { 325 QueueUp = TRUE; 326 to->q_flags |= QQUEUEUP; 327 } 328 else 329 # endif QUEUE 330 { 331 to->q_flags |= QBADADDR; 332 giveresponse(i, TRUE, m); 333 } 334 } 335 # else SMTP 336 syserr("trying to be clever"); 337 # endif SMTP 338 } 339 else 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 return (-1); 653 else 654 return (0); 655 } 656 # endif DAEMON 657 658 /* create a pipe to shove the mail through */ 659 if (pipe(mpvect) < 0) 660 { 661 syserr("pipe (to mailer)"); 662 return (-1); 663 } 664 665 # ifdef SMTP 666 /* if this mailer speaks smtp, create a return pipe */ 667 if (clever && pipe(rpvect) < 0) 668 { 669 syserr("pipe (from mailer)"); 670 (void) close(mpvect[0]); 671 (void) close(mpvect[1]); 672 return (-1); 673 } 674 # endif SMTP 675 676 /* 677 ** Actually fork the mailer process. 678 ** DOFORK is clever about retrying. 679 */ 680 681 DOFORK(XFORK); 682 /* pid is set by DOFORK */ 683 if (pid < 0) 684 { 685 /* failure */ 686 syserr("Cannot fork"); 687 (void) close(mpvect[0]); 688 (void) close(mpvect[1]); 689 if (clever) 690 { 691 (void) close(rpvect[0]); 692 (void) close(rpvect[1]); 693 } 694 return (-1); 695 } 696 else if (pid == 0) 697 { 698 /* child -- set up input & exec mailer */ 699 /* make diagnostic output be standard output */ 700 (void) signal(SIGINT, SIG_IGN); 701 (void) signal(SIGHUP, SIG_IGN); 702 (void) signal(SIGTERM, SIG_DFL); 703 704 /* arrange to filter standard & diag output of command */ 705 if (clever) 706 { 707 (void) close(rpvect[0]); 708 (void) close(1); 709 (void) dup(rpvect[1]); 710 (void) close(rpvect[1]); 711 } 712 else if (OutChannel != stdout) 713 { 714 (void) close(1); 715 (void) dup(fileno(OutChannel)); 716 } 717 (void) close(2); 718 (void) dup(1); 719 720 /* arrange to get standard input */ 721 (void) close(mpvect[1]); 722 (void) close(0); 723 if (dup(mpvect[0]) < 0) 724 { 725 syserr("Cannot dup to zero!"); 726 _exit(EX_OSERR); 727 } 728 (void) close(mpvect[0]); 729 if (!bitset(M_RESTR, m->m_flags)) 730 { 731 if (ctladdr->q_uid == 0) 732 { 733 (void) setgid(DefGid); 734 (void) setuid(DefUid); 735 } 736 else 737 { 738 (void) setgid(ctladdr->q_gid); 739 (void) setuid(ctladdr->q_uid); 740 } 741 } 742 # ifndef VFORK 743 /* 744 ** We have to be careful with vfork - we can't mung up the 745 ** memory but we don't want the mailer to inherit any extra 746 ** open files. Chances are the mailer won't 747 ** care about an extra file, but then again you never know. 748 ** Actually, we would like to close(fileno(pwf)), but it's 749 ** declared static so we can't. But if we fclose(pwf), which 750 ** is what endpwent does, it closes it in the parent too and 751 ** the next getpwnam will be slower. If you have a weird 752 ** mailer that chokes on the extra file you should do the 753 ** endpwent(). 754 ** 755 ** Similar comments apply to log. However, openlog is 756 ** clever enough to set the FIOCLEX mode on the file, 757 ** so it will be closed automatically on the exec. 758 */ 759 760 endpwent(); 761 # ifdef LOG 762 closelog(); 763 # endif LOG 764 # endif VFORK 765 766 /* try to execute the mailer */ 767 execv(m->m_mailer, pvp); 768 769 /* syserr fails because log is closed */ 770 /* syserr("Cannot exec %s", m->m_mailer); */ 771 printf("Cannot exec '%s' errno=%d\n", m->m_mailer, errno); 772 (void) fflush(stdout); 773 _exit(EX_UNAVAILABLE); 774 } 775 776 /* 777 ** Set up return value. 778 */ 779 780 (void) close(mpvect[0]); 781 mfile = fdopen(mpvect[1], "w"); 782 if (clever) 783 { 784 (void) close(rpvect[1]); 785 rfile = fdopen(rpvect[0], "r"); 786 } 787 788 *pmfile = mfile; 789 *prfile = rfile; 790 791 return (pid); 792 } 793 /* 794 ** GIVERESPONSE -- Interpret an error response from a mailer 795 ** 796 ** Parameters: 797 ** stat -- the status code from the mailer (high byte 798 ** only; core dumps must have been taken care of 799 ** already). 800 ** force -- if set, force an error message output, even 801 ** if the mailer seems to like to print its own 802 ** messages. 803 ** m -- the mailer descriptor for this mailer. 804 ** 805 ** Returns: 806 ** none. 807 ** 808 ** Side Effects: 809 ** Errors may be incremented. 810 ** ExitStat may be set. 811 */ 812 813 giveresponse(stat, force, m) 814 int stat; 815 int force; 816 register struct mailer *m; 817 { 818 register char *statmsg; 819 extern char *SysExMsg[]; 820 register int i; 821 extern int N_SysEx; 822 char buf[30]; 823 824 /* 825 ** Compute status message from code. 826 */ 827 828 i = stat - EX__BASE; 829 if (i < 0 || i > N_SysEx) 830 statmsg = NULL; 831 else 832 statmsg = SysExMsg[i]; 833 if (stat == 0) 834 { 835 if (bitset(M_LOCAL, m->m_flags)) 836 statmsg = "delivered"; 837 else 838 statmsg = "queued"; 839 if (Verbose) 840 message(Arpa_Info, statmsg); 841 } 842 # ifdef QUEUE 843 else if (stat == EX_TEMPFAIL) 844 { 845 if (Verbose) 846 message(Arpa_Info, "transmission deferred"); 847 } 848 # endif QUEUE 849 else 850 { 851 Errors++; 852 if (statmsg == NULL && m->m_badstat != 0) 853 { 854 stat = m->m_badstat; 855 i = stat - EX__BASE; 856 # ifdef DEBUG 857 if (i < 0 || i >= N_SysEx) 858 syserr("Bad m_badstat %d", stat); 859 else 860 # endif DEBUG 861 statmsg = SysExMsg[i]; 862 } 863 if (statmsg == NULL) 864 usrerr("unknown mailer response %d", stat); 865 else if (force || !bitset(M_QUIET, m->m_flags) || Verbose) 866 usrerr("%s", statmsg); 867 } 868 869 /* 870 ** Final cleanup. 871 ** Log a record of the transaction. Compute the new 872 ** ExitStat -- if we already had an error, stick with 873 ** that. 874 */ 875 876 if (statmsg == NULL) 877 { 878 (void) sprintf(buf, "error %d", stat); 879 statmsg = buf; 880 } 881 882 # ifdef LOG 883 syslog(LOG_INFO, "%s->%s: %ld: %s", From.q_paddr, To, MsgSize, statmsg); 884 # endif LOG 885 # ifdef QUEUE 886 if (stat != EX_TEMPFAIL) 887 # endif QUEUE 888 setstat(stat); 889 } 890 /* 891 ** PUTMESSAGE -- output a message to the final mailer. 892 ** 893 ** This routine takes care of recreating the header from the 894 ** in-core copy, etc. 895 ** 896 ** Parameters: 897 ** fp -- file to output onto. 898 ** m -- a mailer descriptor. 899 ** xdot -- if set, hide lines beginning with dot. 900 ** 901 ** Returns: 902 ** none. 903 ** 904 ** Side Effects: 905 ** The message is written onto fp. 906 */ 907 908 putmessage(fp, m, xdot) 909 FILE *fp; 910 struct mailer *m; 911 bool xdot; 912 { 913 char buf[BUFSIZ]; 914 915 /* 916 ** Output "From" line unless supressed 917 ** 918 ** >>>>>>>>>> One of the ugliest hacks seen by human eyes is 919 ** >>>>>>>>>> contained herein: UUCP wants those stupid 920 ** >>>>>>>>>> "remote from <host>" lines. Why oh why does a 921 ** >> NOTE >> well-meaning programmer such as myself have to 922 ** >>>>>>>>>> deal with this kind of antique garbage???? 923 ** >>>>>>>>>> This even depends on the local UUCP host name 924 ** >>>>>>>>>> being in the $U macro!!!! 925 */ 926 927 if (!bitset(M_NHDR, m->m_flags)) 928 { 929 # ifdef UGLYUUCP 930 if (bitset(M_UGLYUUCP, m->m_flags)) 931 (void) expand("From $f $d remote from $U", buf, 932 &buf[sizeof buf - 1]); 933 else 934 # endif UGLYUUCP 935 (void) expand("$l", buf, &buf[sizeof buf - 1]); 936 fprintf(fp, "%s\n", buf); 937 } 938 939 /* 940 ** Output all header lines 941 */ 942 943 putheader(fp, m); 944 945 /* 946 ** Output the body of the message 947 */ 948 949 if (TempFile != NULL) 950 { 951 rewind(TempFile); 952 while (!ferror(fp) && fgets(buf, sizeof buf, TempFile) != NULL) 953 fprintf(fp, "%s%s", xdot && buf[0] == '.' ? "." : "", buf); 954 955 if (ferror(TempFile)) 956 { 957 syserr("putmessage: read error"); 958 setstat(EX_IOERR); 959 } 960 } 961 962 (void) fflush(fp); 963 if (ferror(fp) && errno != EPIPE) 964 { 965 syserr("putmessage: write error"); 966 setstat(EX_IOERR); 967 } 968 errno = 0; 969 } 970 /* 971 ** PUTHEADER -- put the header part of a message 972 ** 973 ** Parameters: 974 ** fp -- file to put it on. 975 ** m -- mailer to use. 976 ** 977 ** Returns: 978 ** none. 979 ** 980 ** Side Effects: 981 ** none. 982 */ 983 984 putheader(fp, m) 985 register FILE *fp; 986 register struct mailer *m; 987 { 988 char buf[BUFSIZ]; 989 register HDR *h; 990 extern char *arpadate(); 991 bool anyheader = FALSE; 992 extern char *capitalize(); 993 extern char *hvalue(); 994 extern bool samefrom(); 995 char *of_line; 996 997 of_line = hvalue("original-from"); 998 for (h = Header; h != NULL; h = h->h_link) 999 { 1000 register char *p; 1001 char *origfrom = OrigFrom; 1002 bool nooutput; 1003 1004 nooutput = FALSE; 1005 if (bitset(H_CHECK|H_ACHECK, h->h_flags) && !bitset(h->h_mflags, m->m_flags)) 1006 nooutput = TRUE; 1007 1008 /* use From: line from message if generated is the same */ 1009 if (strcmp(h->h_field, "from") == 0 && origfrom != NULL && 1010 strcmp(m->m_from, "$f") == 0 && of_line == NULL) 1011 { 1012 p = origfrom; 1013 origfrom = NULL; 1014 } 1015 else if (bitset(H_DEFAULT, h->h_flags)) 1016 { 1017 (void) expand(h->h_value, buf, &buf[sizeof buf]); 1018 p = buf; 1019 } 1020 else if (bitset(H_ADDR, h->h_flags)) 1021 { 1022 register int opos; 1023 bool firstone = TRUE; 1024 1025 /* 1026 ** Output the address list translated by the 1027 ** mailer and with commas. 1028 */ 1029 1030 p = h->h_value; 1031 if (p == NULL || *p == '\0' || nooutput) 1032 continue; 1033 fprintf(fp, "%s: ", capitalize(h->h_field)); 1034 opos = strlen(h->h_field) + 2; 1035 while (*p != '\0') 1036 { 1037 register char *name = p; 1038 extern char *remotename(); 1039 char savechar; 1040 1041 /* find the end of the name */ 1042 while (*p != '\0' && *p != ',') 1043 { 1044 extern bool isatword(); 1045 char *oldp; 1046 1047 if (!OldStyle || !isspace(*p)) 1048 { 1049 p++; 1050 continue; 1051 } 1052 oldp = p; 1053 while (*p != '\0' && isspace(*p)) 1054 p++; 1055 if (*p != '@' && !isatword(p)) 1056 { 1057 p = oldp; 1058 break; 1059 } 1060 p += *p == '@' ? 1 : 2; 1061 while (*p != '\0' && isspace(*p)) 1062 p++; 1063 } 1064 savechar = *p; 1065 *p = '\0'; 1066 1067 /* translate the name to be relative */ 1068 name = remotename(name, m); 1069 if (*name == '\0') 1070 continue; 1071 1072 /* output the name with nice formatting */ 1073 opos += strlen(name); 1074 if (!firstone) 1075 opos += 2; 1076 if (opos > 78 && !firstone) 1077 { 1078 fprintf(fp, ",\n "); 1079 opos = 8 + strlen(name); 1080 } 1081 else if (!firstone) 1082 fprintf(fp, ", "); 1083 fprintf(fp, "%s", name); 1084 firstone = FALSE; 1085 1086 /* clean up the source string */ 1087 *p = savechar; 1088 while (*p != '\0' && (isspace(*p) || *p == ',')) 1089 p++; 1090 } 1091 fprintf(fp, "\n"); 1092 nooutput = TRUE; 1093 } 1094 else 1095 p = h->h_value; 1096 if (p == NULL || *p == '\0') 1097 continue; 1098 1099 /* hack, hack -- output Original-From field if different */ 1100 if (strcmp(h->h_field, "from") == 0 && origfrom != NULL) 1101 { 1102 /* output new Original-From line if needed */ 1103 if (of_line == NULL && !samefrom(p, origfrom)) 1104 { 1105 fprintf(fp, "Original-From: %s\n", origfrom); 1106 anyheader = TRUE; 1107 } 1108 if (of_line != NULL && !nooutput && samefrom(p, of_line)) 1109 { 1110 /* delete Original-From: line if redundant */ 1111 p = of_line; 1112 of_line = NULL; 1113 } 1114 } 1115 else if (strcmp(h->h_field, "original-from") == 0 && of_line == NULL) 1116 nooutput = TRUE; 1117 1118 /* finally, output the header line */ 1119 if (!nooutput) 1120 { 1121 fprintf(fp, "%s: %s\n", capitalize(h->h_field), p); 1122 h->h_flags |= H_USED; 1123 anyheader = TRUE; 1124 } 1125 } 1126 if (anyheader) 1127 fprintf(fp, "\n"); 1128 } 1129 /* 1130 ** ISATWORD -- tell if the word we are pointing to is "at". 1131 ** 1132 ** Parameters: 1133 ** p -- word to check. 1134 ** 1135 ** Returns: 1136 ** TRUE -- if p is the word at. 1137 ** FALSE -- otherwise. 1138 ** 1139 ** Side Effects: 1140 ** none. 1141 */ 1142 1143 bool 1144 isatword(p) 1145 register char *p; 1146 { 1147 extern char lower(); 1148 1149 if (lower(p[0]) == 'a' && lower(p[1]) == 't' && 1150 p[2] != '\0' && isspace(p[2])) 1151 return (TRUE); 1152 return (FALSE); 1153 } 1154 /* 1155 ** REMOTENAME -- return the name relative to the current mailer 1156 ** 1157 ** Parameters: 1158 ** name -- the name to translate. 1159 ** 1160 ** Returns: 1161 ** the text string representing this address relative to 1162 ** the receiving mailer. 1163 ** 1164 ** Side Effects: 1165 ** none. 1166 ** 1167 ** Warnings: 1168 ** The text string returned is tucked away locally; 1169 ** copy it if you intend to save it. 1170 */ 1171 1172 char * 1173 remotename(name, m) 1174 char *name; 1175 struct mailer *m; 1176 { 1177 static char buf[MAXNAME]; 1178 char lbuf[MAXNAME]; 1179 extern char *macvalue(); 1180 char *oldf = macvalue('f'); 1181 char *oldx = macvalue('x'); 1182 char *oldg = macvalue('g'); 1183 extern char **prescan(); 1184 register char **pvp; 1185 extern char *getxpart(); 1186 1187 /* 1188 ** Do general rewriting of name. 1189 ** This will also take care of doing global name translation. 1190 */ 1191 1192 define('x', getxpart(name)); 1193 pvp = prescan(name, '\0'); 1194 for (;;) 1195 { 1196 rewrite(pvp, 1); 1197 rewrite(pvp, 3); 1198 if (**pvp == CANONNET) 1199 { 1200 auto ADDRESS a; 1201 register char *p; 1202 extern char *hostalias(); 1203 1204 /* oops... resolved to something */ 1205 if (buildaddr(pvp, &a) == NULL) 1206 return (name); 1207 p = hostalias(&a); 1208 if (p == NULL) 1209 return (name); 1210 pvp = prescan(p, '\0'); 1211 } 1212 else 1213 { 1214 cataddr(pvp, lbuf, sizeof lbuf); 1215 break; 1216 } 1217 } 1218 1219 /* make the name relative to the receiving mailer */ 1220 define('f', lbuf); 1221 (void) expand(m->m_from, buf, &buf[sizeof buf - 1]); 1222 1223 /* rewrite to get rid of garbage we added in the expand above */ 1224 pvp = prescan(buf, '\0'); 1225 rewrite(pvp, 2); 1226 cataddr(pvp, lbuf, sizeof lbuf); 1227 1228 /* now add any comment info we had before back */ 1229 define('g', lbuf); 1230 (void) expand("$q", buf, &buf[sizeof buf - 1]); 1231 1232 define('f', oldf); 1233 define('g', oldg); 1234 define('x', oldx); 1235 1236 # ifdef DEBUG 1237 if (Debug > 0) 1238 printf("remotename(%s) => `%s'\n", name, buf); 1239 # endif DEBUG 1240 return (buf); 1241 } 1242 /* 1243 ** SAMEFROM -- tell if two text addresses represent the same from address. 1244 ** 1245 ** Parameters: 1246 ** ifrom -- internally generated form of from address. 1247 ** efrom -- external form of from address. 1248 ** 1249 ** Returns: 1250 ** TRUE -- if they convey the same info. 1251 ** FALSE -- if any information has been lost. 1252 ** 1253 ** Side Effects: 1254 ** none. 1255 */ 1256 1257 bool 1258 samefrom(ifrom, efrom) 1259 char *ifrom; 1260 char *efrom; 1261 { 1262 register char *p; 1263 char buf[MAXNAME + 4]; 1264 1265 # ifdef DEBUG 1266 if (Debug > 7) 1267 printf("samefrom(%s,%s)-->", ifrom, efrom); 1268 # endif DEBUG 1269 if (strcmp(ifrom, efrom) == 0) 1270 goto success; 1271 p = index(ifrom, '@'); 1272 if (p == NULL) 1273 goto failure; 1274 *p = '\0'; 1275 strcpy(buf, ifrom); 1276 strcat(buf, " at "); 1277 *p++ = '@'; 1278 strcat(buf, p); 1279 if (strcmp(buf, efrom) == 0) 1280 goto success; 1281 1282 failure: 1283 # ifdef DEBUG 1284 if (Debug > 7) 1285 printf("FALSE\n"); 1286 # endif DEBUG 1287 return (FALSE); 1288 1289 success: 1290 # ifdef DEBUG 1291 if (Debug > 7) 1292 printf("TRUE\n"); 1293 # endif DEBUG 1294 return (TRUE); 1295 } 1296 /* 1297 ** MAILFILE -- Send a message to a file. 1298 ** 1299 ** If the file has the setuid/setgid bits set, but NO execute 1300 ** bits, sendmail will try to become the owner of that file 1301 ** rather than the real user. Obviously, this only works if 1302 ** sendmail runs as root. 1303 ** 1304 ** Parameters: 1305 ** filename -- the name of the file to send to. 1306 ** ctladdr -- the controlling address header -- includes 1307 ** the userid/groupid to be when sending. 1308 ** 1309 ** Returns: 1310 ** The exit code associated with the operation. 1311 ** 1312 ** Side Effects: 1313 ** none. 1314 */ 1315 1316 mailfile(filename, ctladdr) 1317 char *filename; 1318 ADDRESS *ctladdr; 1319 { 1320 register FILE *f; 1321 register int pid; 1322 1323 /* 1324 ** Fork so we can change permissions here. 1325 ** Note that we MUST use fork, not vfork, because of 1326 ** the complications of calling subroutines, etc. 1327 */ 1328 1329 DOFORK(fork); 1330 1331 if (pid < 0) 1332 return (EX_OSERR); 1333 else if (pid == 0) 1334 { 1335 /* child -- actually write to file */ 1336 struct stat stb; 1337 1338 (void) signal(SIGINT, SIG_DFL); 1339 (void) signal(SIGHUP, SIG_DFL); 1340 (void) signal(SIGTERM, SIG_DFL); 1341 umask(OldUmask); 1342 if (stat(filename, &stb) < 0) 1343 stb.st_mode = 0666; 1344 if (bitset(0111, stb.st_mode)) 1345 exit(EX_CANTCREAT); 1346 if (ctladdr == NULL) 1347 ctladdr = &From; 1348 if (!bitset(S_ISGID, stb.st_mode) || setgid(stb.st_gid) < 0) 1349 { 1350 if (ctladdr->q_uid == 0) 1351 (void) setgid(DefGid); 1352 else 1353 (void) setgid(ctladdr->q_gid); 1354 } 1355 if (!bitset(S_ISUID, stb.st_mode) || setuid(stb.st_uid) < 0) 1356 { 1357 if (ctladdr->q_uid == 0) 1358 (void) setuid(DefUid); 1359 else 1360 (void) setuid(ctladdr->q_uid); 1361 } 1362 f = fopen(filename, "a"); 1363 if (f == NULL) 1364 exit(EX_CANTCREAT); 1365 1366 putmessage(f, Mailer[1], FALSE); 1367 fputs("\n", f); 1368 (void) fclose(f); 1369 (void) fflush(stdout); 1370 1371 /* reset ISUID & ISGID bits */ 1372 (void) chmod(filename, (int) stb.st_mode); 1373 exit(EX_OK); 1374 /*NOTREACHED*/ 1375 } 1376 else 1377 { 1378 /* parent -- wait for exit status */ 1379 register int i; 1380 auto int stat; 1381 1382 while ((i = wait(&stat)) != pid) 1383 { 1384 if (i < 0) 1385 { 1386 stat = EX_OSERR << 8; 1387 break; 1388 } 1389 } 1390 if ((stat & 0377) != 0) 1391 stat = EX_UNAVAILABLE << 8; 1392 return ((stat >> 8) & 0377); 1393 } 1394 } 1395 /* 1396 ** SENDALL -- actually send all the messages. 1397 ** 1398 ** Parameters: 1399 ** verifyonly -- if set, only give verification messages. 1400 ** 1401 ** Returns: 1402 ** none. 1403 ** 1404 ** Side Effects: 1405 ** Scans the send lists and sends everything it finds. 1406 */ 1407 1408 sendall(verifyonly) 1409 bool verifyonly; 1410 { 1411 register ADDRESS *q; 1412 typedef int (*fnptr)(); 1413 1414 # ifdef DEBUG 1415 if (Debug > 1) 1416 { 1417 printf("\nSendQueue:\n"); 1418 printaddr(SendQueue, TRUE); 1419 } 1420 # endif DEBUG 1421 1422 for (q = SendQueue; q != NULL; q = q->q_next) 1423 { 1424 if (verifyonly) 1425 { 1426 To = q->q_paddr; 1427 if (!bitset(QDONTSEND|QBADADDR, q->q_flags)) 1428 { 1429 if (bitset(M_LOCAL, q->q_mailer->m_flags)) 1430 message(Arpa_Info, "deliverable"); 1431 else 1432 message(Arpa_Info, "queueable"); 1433 } 1434 } 1435 else 1436 (void) deliver(q, (fnptr) NULL); 1437 } 1438 } 1439