1 /* 2 * Copyright (c) 1998-2003, 2010 Sendmail, Inc. and its suppliers. 3 * All rights reserved. 4 * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved. 5 * Copyright (c) 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * By using this file, you agree to the terms and conditions set 9 * forth in the LICENSE file which can be found at the top level of 10 * the sendmail distribution. 11 * 12 */ 13 14 #include <sendmail.h> 15 16 SM_RCSID("@(#)$Id: err.c,v 8.205 2010/02/03 23:22:41 ca Exp $") 17 18 #if LDAPMAP 19 # include <lber.h> 20 # include <ldap.h> /* for LDAP error codes */ 21 #endif /* LDAPMAP */ 22 23 static void putoutmsg __P((char *, bool, bool)); 24 static void puterrmsg __P((char *)); 25 static char *fmtmsg __P((char *, const char *, const char *, const char *, 26 int, const char *, va_list)); 27 28 /* 29 ** FATAL_ERROR -- handle a fatal exception 30 ** 31 ** This function is installed as the default exception handler 32 ** in the main sendmail process, and in all child processes 33 ** that we create. Its job is to handle exceptions that are not 34 ** handled at a lower level. 35 ** 36 ** The theory is that unhandled exceptions will be 'fatal' class 37 ** exceptions (with an "F:" prefix), such as the out-of-memory 38 ** exception "F:sm.heap". As such, they are handled by exiting 39 ** the process in exactly the same way that xalloc() in Sendmail 8.10 40 ** exits the process when it fails due to lack of memory: 41 ** we call syserr with a message beginning with "!". 42 ** 43 ** Parameters: 44 ** exc -- exception which is terminating this process 45 ** 46 ** Returns: 47 ** none 48 */ 49 50 void 51 fatal_error(exc) 52 SM_EXC_T *exc; 53 { 54 static char buf[256]; 55 SM_FILE_T f; 56 57 /* 58 ** This function may be called when the heap is exhausted. 59 ** The following code writes the message for 'exc' into our 60 ** static buffer without allocating memory or raising exceptions. 61 */ 62 63 sm_strio_init(&f, buf, sizeof(buf)); 64 sm_exc_write(exc, &f); 65 (void) sm_io_flush(&f, SM_TIME_DEFAULT); 66 67 /* 68 ** Terminate the process after logging an error and cleaning up. 69 ** Problems: 70 ** - syserr decides what class of error this is by looking at errno. 71 ** That's no good; we should look at the exc structure. 72 ** - The cleanup code should be moved out of syserr 73 ** and into individual exception handlers 74 ** that are part of the module they clean up after. 75 */ 76 77 errno = ENOMEM; 78 syserr("!%s", buf); 79 } 80 81 /* 82 ** SYSERR -- Print error message. 83 ** 84 ** Prints an error message via sm_io_printf to the diagnostic output. 85 ** 86 ** If the first character of the syserr message is `!' it will 87 ** log this as an ALERT message and exit immediately. This can 88 ** leave queue files in an indeterminate state, so it should not 89 ** be used lightly. 90 ** 91 ** If the first character of the syserr message is '!' or '@' 92 ** then syserr knows that the process is about to be terminated, 93 ** so the SMTP reply code defaults to 421. Otherwise, the 94 ** reply code defaults to 451 or 554, depending on errno. 95 ** 96 ** Parameters: 97 ** fmt -- the format string. An optional '!' or '@', 98 ** followed by an optional three-digit SMTP 99 ** reply code, followed by message text. 100 ** (others) -- parameters 101 ** 102 ** Returns: 103 ** none 104 ** Raises E:mta.quickabort if QuickAbort is set. 105 ** 106 ** Side Effects: 107 ** increments Errors. 108 ** sets ExitStat. 109 */ 110 111 char MsgBuf[BUFSIZ*2]; /* text of most recent message */ 112 static char HeldMessageBuf[sizeof(MsgBuf)]; /* for held messages */ 113 114 #if NAMED_BIND && !defined(NO_DATA) 115 # define NO_DATA NO_ADDRESS 116 #endif /* NAMED_BIND && !defined(NO_DATA) */ 117 118 void 119 /*VARARGS1*/ 120 #ifdef __STDC__ 121 syserr(const char *fmt, ...) 122 #else /* __STDC__ */ 123 syserr(fmt, va_alist) 124 const char *fmt; 125 va_dcl 126 #endif /* __STDC__ */ 127 { 128 register char *p; 129 int save_errno = errno; 130 bool panic; 131 bool exiting; 132 char *user; 133 char *enhsc; 134 char *errtxt; 135 struct passwd *pw; 136 char ubuf[80]; 137 SM_VA_LOCAL_DECL 138 139 switch (*fmt) 140 { 141 case '!': 142 ++fmt; 143 panic = true; 144 exiting = true; 145 break; 146 case '@': 147 ++fmt; 148 panic = false; 149 exiting = true; 150 break; 151 default: 152 panic = false; 153 exiting = false; 154 break; 155 } 156 157 /* format and output the error message */ 158 if (exiting) 159 { 160 /* 161 ** Since we are terminating the process, 162 ** we are aborting the entire SMTP session, 163 ** rather than just the current transaction. 164 */ 165 166 p = "421"; 167 enhsc = "4.0.0"; 168 } 169 else if (save_errno == 0) 170 { 171 p = "554"; 172 enhsc = "5.0.0"; 173 } 174 else 175 { 176 p = "451"; 177 enhsc = "4.0.0"; 178 } 179 SM_VA_START(ap, fmt); 180 errtxt = fmtmsg(MsgBuf, (char *) NULL, p, enhsc, save_errno, fmt, ap); 181 SM_VA_END(ap); 182 puterrmsg(MsgBuf); 183 184 /* save this message for mailq printing */ 185 if (!panic && CurEnv != NULL) 186 { 187 char *nmsg = sm_rpool_strdup_x(CurEnv->e_rpool, errtxt); 188 189 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL) 190 sm_free(CurEnv->e_message); 191 CurEnv->e_message = nmsg; 192 } 193 194 /* determine exit status if not already set */ 195 if (ExitStat == EX_OK) 196 { 197 if (save_errno == 0) 198 ExitStat = EX_SOFTWARE; 199 else 200 ExitStat = EX_OSERR; 201 if (tTd(54, 1)) 202 sm_dprintf("syserr: ExitStat = %d\n", ExitStat); 203 } 204 205 pw = sm_getpwuid(RealUid); 206 if (pw != NULL) 207 user = pw->pw_name; 208 else 209 { 210 user = ubuf; 211 (void) sm_snprintf(ubuf, sizeof(ubuf), "UID%d", (int) RealUid); 212 } 213 214 if (LogLevel > 0) 215 sm_syslog(panic ? LOG_ALERT : LOG_CRIT, 216 CurEnv == NULL ? NOQID : CurEnv->e_id, 217 "SYSERR(%s): %.900s", 218 user, errtxt); 219 switch (save_errno) 220 { 221 case EBADF: 222 case ENFILE: 223 case EMFILE: 224 case ENOTTY: 225 #ifdef EFBIG 226 case EFBIG: 227 #endif /* EFBIG */ 228 #ifdef ESPIPE 229 case ESPIPE: 230 #endif /* ESPIPE */ 231 #ifdef EPIPE 232 case EPIPE: 233 #endif /* EPIPE */ 234 #ifdef ENOBUFS 235 case ENOBUFS: 236 #endif /* ENOBUFS */ 237 #ifdef ESTALE 238 case ESTALE: 239 #endif /* ESTALE */ 240 printopenfds(true); 241 mci_dump_all(smioout, true); 242 break; 243 } 244 if (panic) 245 { 246 #if XLA 247 xla_all_end(); 248 #endif /* XLA */ 249 sync_queue_time(); 250 if (tTd(0, 1)) 251 abort(); 252 exit(EX_OSERR); 253 } 254 errno = 0; 255 if (QuickAbort) 256 sm_exc_raisenew_x(&EtypeQuickAbort, 2); 257 } 258 /* 259 ** USRERR -- Signal user error. 260 ** 261 ** This is much like syserr except it is for user errors. 262 ** 263 ** Parameters: 264 ** fmt -- the format string. If it does not begin with 265 ** a three-digit SMTP reply code, 550 is assumed. 266 ** (others) -- sm_io_printf strings 267 ** 268 ** Returns: 269 ** none 270 ** Raises E:mta.quickabort if QuickAbort is set. 271 ** 272 ** Side Effects: 273 ** increments Errors. 274 */ 275 276 /*VARARGS1*/ 277 void 278 #ifdef __STDC__ 279 usrerr(const char *fmt, ...) 280 #else /* __STDC__ */ 281 usrerr(fmt, va_alist) 282 const char *fmt; 283 va_dcl 284 #endif /* __STDC__ */ 285 { 286 char *enhsc; 287 char *errtxt; 288 SM_VA_LOCAL_DECL 289 290 if (fmt[0] == '5' || fmt[0] == '6') 291 enhsc = "5.0.0"; 292 else if (fmt[0] == '4' || fmt[0] == '8') 293 enhsc = "4.0.0"; 294 else if (fmt[0] == '2') 295 enhsc = "2.0.0"; 296 else 297 enhsc = NULL; 298 SM_VA_START(ap, fmt); 299 errtxt = fmtmsg(MsgBuf, CurEnv->e_to, "550", enhsc, 0, fmt, ap); 300 SM_VA_END(ap); 301 302 if (SuprErrs) 303 return; 304 305 /* save this message for mailq printing */ 306 switch (MsgBuf[0]) 307 { 308 case '4': 309 case '8': 310 if (CurEnv->e_message != NULL) 311 break; 312 313 /* FALLTHROUGH */ 314 315 case '5': 316 case '6': 317 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL) 318 sm_free(CurEnv->e_message); 319 if (MsgBuf[0] == '6') 320 { 321 char buf[MAXLINE]; 322 323 (void) sm_snprintf(buf, sizeof(buf), 324 "Postmaster warning: %.*s", 325 (int) sizeof(buf) - 22, errtxt); 326 CurEnv->e_message = 327 sm_rpool_strdup_x(CurEnv->e_rpool, buf); 328 } 329 else 330 { 331 CurEnv->e_message = 332 sm_rpool_strdup_x(CurEnv->e_rpool, errtxt); 333 } 334 break; 335 } 336 337 puterrmsg(MsgBuf); 338 if (LogLevel > 3 && LogUsrErrs) 339 sm_syslog(LOG_NOTICE, CurEnv->e_id, "%.900s", errtxt); 340 if (QuickAbort) 341 sm_exc_raisenew_x(&EtypeQuickAbort, 1); 342 } 343 /* 344 ** USRERRENH -- Signal user error. 345 ** 346 ** Same as usrerr but with enhanced status code. 347 ** 348 ** Parameters: 349 ** enhsc -- the enhanced status code. 350 ** fmt -- the format string. If it does not begin with 351 ** a three-digit SMTP reply code, 550 is assumed. 352 ** (others) -- sm_io_printf strings 353 ** 354 ** Returns: 355 ** none 356 ** Raises E:mta.quickabort if QuickAbort is set. 357 ** 358 ** Side Effects: 359 ** increments Errors. 360 */ 361 362 /*VARARGS2*/ 363 void 364 #ifdef __STDC__ 365 usrerrenh(char *enhsc, const char *fmt, ...) 366 #else /* __STDC__ */ 367 usrerrenh(enhsc, fmt, va_alist) 368 char *enhsc; 369 const char *fmt; 370 va_dcl 371 #endif /* __STDC__ */ 372 { 373 char *errtxt; 374 SM_VA_LOCAL_DECL 375 376 if (enhsc == NULL || *enhsc == '\0') 377 { 378 if (fmt[0] == '5' || fmt[0] == '6') 379 enhsc = "5.0.0"; 380 else if (fmt[0] == '4' || fmt[0] == '8') 381 enhsc = "4.0.0"; 382 else if (fmt[0] == '2') 383 enhsc = "2.0.0"; 384 } 385 SM_VA_START(ap, fmt); 386 errtxt = fmtmsg(MsgBuf, CurEnv->e_to, "550", enhsc, 0, fmt, ap); 387 SM_VA_END(ap); 388 389 if (SuprErrs) 390 return; 391 392 /* save this message for mailq printing */ 393 switch (MsgBuf[0]) 394 { 395 case '4': 396 case '8': 397 if (CurEnv->e_message != NULL) 398 break; 399 400 /* FALLTHROUGH */ 401 402 case '5': 403 case '6': 404 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL) 405 sm_free(CurEnv->e_message); 406 if (MsgBuf[0] == '6') 407 { 408 char buf[MAXLINE]; 409 410 (void) sm_snprintf(buf, sizeof(buf), 411 "Postmaster warning: %.*s", 412 (int) sizeof(buf) - 22, errtxt); 413 CurEnv->e_message = 414 sm_rpool_strdup_x(CurEnv->e_rpool, buf); 415 } 416 else 417 { 418 CurEnv->e_message = 419 sm_rpool_strdup_x(CurEnv->e_rpool, errtxt); 420 } 421 break; 422 } 423 424 puterrmsg(MsgBuf); 425 if (LogLevel > 3 && LogUsrErrs) 426 sm_syslog(LOG_NOTICE, CurEnv->e_id, "%.900s", errtxt); 427 if (QuickAbort) 428 sm_exc_raisenew_x(&EtypeQuickAbort, 1); 429 } 430 431 /* 432 ** MESSAGE -- print message (not necessarily an error) 433 ** 434 ** Parameters: 435 ** msg -- the message (sm_io_printf fmt) -- it can begin with 436 ** an SMTP reply code. If not, 050 is assumed. 437 ** (others) -- sm_io_printf arguments 438 ** 439 ** Returns: 440 ** none 441 ** 442 ** Side Effects: 443 ** none. 444 */ 445 446 /*VARARGS1*/ 447 void 448 #ifdef __STDC__ 449 message(const char *msg, ...) 450 #else /* __STDC__ */ 451 message(msg, va_alist) 452 const char *msg; 453 va_dcl 454 #endif /* __STDC__ */ 455 { 456 char *errtxt; 457 SM_VA_LOCAL_DECL 458 459 errno = 0; 460 SM_VA_START(ap, msg); 461 errtxt = fmtmsg(MsgBuf, CurEnv->e_to, "050", (char *) NULL, 0, msg, ap); 462 SM_VA_END(ap); 463 putoutmsg(MsgBuf, false, false); 464 465 /* save this message for mailq printing */ 466 switch (MsgBuf[0]) 467 { 468 case '4': 469 case '8': 470 if (CurEnv->e_message != NULL) 471 break; 472 /* FALLTHROUGH */ 473 474 case '5': 475 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL) 476 sm_free(CurEnv->e_message); 477 CurEnv->e_message = sm_rpool_strdup_x(CurEnv->e_rpool, errtxt); 478 break; 479 } 480 } 481 482 483 /* 484 ** NMESSAGE -- print message (not necessarily an error) 485 ** 486 ** Just like "message" except it never puts the to... tag on. 487 ** 488 ** Parameters: 489 ** msg -- the message (sm_io_printf fmt) -- if it begins 490 ** with a three digit SMTP reply code, that is used, 491 ** otherwise 050 is assumed. 492 ** (others) -- sm_io_printf arguments 493 ** 494 ** Returns: 495 ** none 496 ** 497 ** Side Effects: 498 ** none. 499 */ 500 501 /*VARARGS1*/ 502 void 503 #ifdef __STDC__ 504 nmessage(const char *msg, ...) 505 #else /* __STDC__ */ 506 nmessage(msg, va_alist) 507 const char *msg; 508 va_dcl 509 #endif /* __STDC__ */ 510 { 511 char *errtxt; 512 SM_VA_LOCAL_DECL 513 514 errno = 0; 515 SM_VA_START(ap, msg); 516 errtxt = fmtmsg(MsgBuf, (char *) NULL, "050", 517 (char *) NULL, 0, msg, ap); 518 SM_VA_END(ap); 519 putoutmsg(MsgBuf, false, false); 520 521 /* save this message for mailq printing */ 522 switch (MsgBuf[0]) 523 { 524 case '4': 525 case '8': 526 if (CurEnv->e_message != NULL) 527 break; 528 /* FALLTHROUGH */ 529 530 case '5': 531 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL) 532 sm_free(CurEnv->e_message); 533 CurEnv->e_message = sm_rpool_strdup_x(CurEnv->e_rpool, errtxt); 534 break; 535 } 536 } 537 /* 538 ** PUTOUTMSG -- output error message to transcript and channel 539 ** 540 ** Parameters: 541 ** msg -- message to output (in SMTP format). 542 ** holdmsg -- if true, don't output a copy of the message to 543 ** our output channel. 544 ** heldmsg -- if true, this is a previously held message; 545 ** don't log it to the transcript file. 546 ** 547 ** Returns: 548 ** none. 549 ** 550 ** Side Effects: 551 ** Outputs msg to the transcript. 552 ** If appropriate, outputs it to the channel. 553 ** Deletes SMTP reply code number as appropriate. 554 */ 555 556 static void 557 putoutmsg(msg, holdmsg, heldmsg) 558 char *msg; 559 bool holdmsg; 560 bool heldmsg; 561 { 562 char msgcode = msg[0]; 563 char *errtxt = msg; 564 char *id; 565 566 /* display for debugging */ 567 if (tTd(54, 8)) 568 sm_dprintf("--- %s%s%s\n", msg, holdmsg ? " (hold)" : "", 569 heldmsg ? " (held)" : ""); 570 571 /* map warnings to something SMTP can handle */ 572 if (msgcode == '6') 573 msg[0] = '5'; 574 else if (msgcode == '8') 575 msg[0] = '4'; 576 id = (CurEnv != NULL) ? CurEnv->e_id : NULL; 577 578 /* output to transcript if serious */ 579 if (!heldmsg && CurEnv != NULL && CurEnv->e_xfp != NULL && 580 strchr("45", msg[0]) != NULL) 581 (void) sm_io_fprintf(CurEnv->e_xfp, SM_TIME_DEFAULT, "%s\n", 582 msg); 583 584 if (LogLevel > 14 && (OpMode == MD_SMTP || OpMode == MD_DAEMON)) 585 sm_syslog(LOG_INFO, id, 586 "--- %s%s%s", msg, holdmsg ? " (hold)" : "", 587 heldmsg ? " (held)" : ""); 588 589 if (msgcode == '8') 590 msg[0] = '0'; 591 592 /* output to channel if appropriate */ 593 if (!Verbose && msg[0] == '0') 594 return; 595 if (holdmsg) 596 { 597 /* save for possible future display */ 598 msg[0] = msgcode; 599 if (HeldMessageBuf[0] == '5' && msgcode == '4') 600 return; 601 (void) sm_strlcpy(HeldMessageBuf, msg, sizeof(HeldMessageBuf)); 602 return; 603 } 604 605 (void) sm_io_flush(smioout, SM_TIME_DEFAULT); 606 607 if (OutChannel == NULL) 608 return; 609 610 /* find actual text of error (after SMTP status codes) */ 611 if (ISSMTPREPLY(errtxt)) 612 { 613 int l; 614 615 errtxt += 4; 616 l = isenhsc(errtxt, ' '); 617 if (l <= 0) 618 l = isenhsc(errtxt, '\0'); 619 if (l > 0) 620 errtxt += l + 1; 621 } 622 623 /* if DisConnected, OutChannel now points to the transcript */ 624 if (!DisConnected && 625 (OpMode == MD_SMTP || OpMode == MD_DAEMON || OpMode == MD_ARPAFTP)) 626 (void) sm_io_fprintf(OutChannel, SM_TIME_DEFAULT, "%s\r\n", 627 msg); 628 else 629 (void) sm_io_fprintf(OutChannel, SM_TIME_DEFAULT, "%s\n", 630 errtxt); 631 if (TrafficLogFile != NULL) 632 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT, 633 "%05d >>> %s\n", (int) CurrentPid, 634 (OpMode == MD_SMTP || OpMode == MD_DAEMON) 635 ? msg : errtxt); 636 #if !PIPELINING 637 /* XXX can't flush here for SMTP pipelining */ 638 if (msg[3] == ' ') 639 (void) sm_io_flush(OutChannel, SM_TIME_DEFAULT); 640 if (!sm_io_error(OutChannel) || DisConnected) 641 return; 642 643 /* 644 ** Error on output -- if reporting lost channel, just ignore it. 645 ** Also, ignore errors from QUIT response (221 message) -- some 646 ** rude servers don't read result. 647 */ 648 649 if (InChannel == NULL || sm_io_eof(InChannel) || 650 sm_io_error(InChannel) || strncmp(msg, "221", 3) == 0) 651 return; 652 653 /* can't call syserr, 'cause we are using MsgBuf */ 654 HoldErrs = true; 655 if (LogLevel > 0) 656 sm_syslog(LOG_CRIT, id, 657 "SYSERR: putoutmsg (%s): error on output channel sending \"%s\": %s", 658 CURHOSTNAME, 659 shortenstring(msg, MAXSHORTSTR), sm_errstring(errno)); 660 #endif /* !PIPELINING */ 661 } 662 /* 663 ** PUTERRMSG -- like putoutmsg, but does special processing for error messages 664 ** 665 ** Parameters: 666 ** msg -- the message to output. 667 ** 668 ** Returns: 669 ** none. 670 ** 671 ** Side Effects: 672 ** Sets the fatal error bit in the envelope as appropriate. 673 */ 674 675 static void 676 puterrmsg(msg) 677 char *msg; 678 { 679 char msgcode = msg[0]; 680 681 /* output the message as usual */ 682 putoutmsg(msg, HoldErrs, false); 683 684 /* be careful about multiple error messages */ 685 if (OnlyOneError) 686 HoldErrs = true; 687 688 /* signal the error */ 689 Errors++; 690 691 if (CurEnv == NULL) 692 return; 693 694 if (msgcode == '6') 695 { 696 /* notify the postmaster */ 697 CurEnv->e_flags |= EF_PM_NOTIFY; 698 } 699 else if (msgcode == '5' && bitset(EF_GLOBALERRS, CurEnv->e_flags)) 700 { 701 /* mark long-term fatal errors */ 702 CurEnv->e_flags |= EF_FATALERRS; 703 } 704 } 705 /* 706 ** ISENHSC -- check whether a string contains an enhanced status code 707 ** 708 ** Parameters: 709 ** s -- string with possible enhanced status code. 710 ** delim -- delim for enhanced status code. 711 ** 712 ** Returns: 713 ** 0 -- no enhanced status code. 714 ** >4 -- length of enhanced status code. 715 ** 716 ** Side Effects: 717 ** none. 718 */ 719 int 720 isenhsc(s, delim) 721 const char *s; 722 int delim; 723 { 724 int l, h; 725 726 if (s == NULL) 727 return 0; 728 if (!((*s == '2' || *s == '4' || *s == '5') && s[1] == '.')) 729 return 0; 730 h = 0; 731 l = 2; 732 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h])) 733 ++h; 734 if (h == 0 || s[l + h] != '.') 735 return 0; 736 l += h + 1; 737 h = 0; 738 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h])) 739 ++h; 740 if (h == 0 || s[l + h] != delim) 741 return 0; 742 return l + h; 743 } 744 /* 745 ** EXTENHSC -- check and extract an enhanced status code 746 ** 747 ** Parameters: 748 ** s -- string with possible enhanced status code. 749 ** delim -- delim for enhanced status code. 750 ** e -- pointer to storage for enhanced status code. 751 ** must be != NULL and have space for at least 752 ** 10 characters ([245].[0-9]{1,3}.[0-9]{1,3}) 753 ** 754 ** Returns: 755 ** 0 -- no enhanced status code. 756 ** >4 -- length of enhanced status code. 757 ** 758 ** Side Effects: 759 ** fills e with enhanced status code. 760 */ 761 762 int 763 extenhsc(s, delim, e) 764 const char *s; 765 int delim; 766 char *e; 767 { 768 int l, h; 769 770 if (s == NULL) 771 return 0; 772 if (!((*s == '2' || *s == '4' || *s == '5') && s[1] == '.')) 773 return 0; 774 h = 0; 775 l = 2; 776 e[0] = s[0]; 777 e[1] = '.'; 778 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h])) 779 { 780 e[l + h] = s[l + h]; 781 ++h; 782 } 783 if (h == 0 || s[l + h] != '.') 784 return 0; 785 e[l + h] = '.'; 786 l += h + 1; 787 h = 0; 788 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h])) 789 { 790 e[l + h] = s[l + h]; 791 ++h; 792 } 793 if (h == 0 || s[l + h] != delim) 794 return 0; 795 e[l + h] = '\0'; 796 return l + h; 797 } 798 /* 799 ** FMTMSG -- format a message into buffer. 800 ** 801 ** Parameters: 802 ** eb -- error buffer to get result -- MUST BE MsgBuf. 803 ** to -- the recipient tag for this message. 804 ** num -- default three digit SMTP reply code. 805 ** enhsc -- enhanced status code. 806 ** en -- the error number to display. 807 ** fmt -- format of string. 808 ** ap -- arguments for fmt. 809 ** 810 ** Returns: 811 ** pointer to error text beyond status codes. 812 ** 813 ** Side Effects: 814 ** none. 815 */ 816 817 static char * 818 fmtmsg(eb, to, num, enhsc, eno, fmt, ap) 819 register char *eb; 820 const char *to; 821 const char *num; 822 const char *enhsc; 823 int eno; 824 const char *fmt; 825 SM_VA_LOCAL_DECL 826 { 827 char del; 828 int l; 829 int spaceleft = sizeof(MsgBuf); 830 char *errtxt; 831 832 /* output the reply code */ 833 if (ISSMTPCODE(fmt)) 834 { 835 num = fmt; 836 fmt += 4; 837 } 838 if (num[3] == '-') 839 del = '-'; 840 else 841 del = ' '; 842 if (SoftBounce && num[0] == '5') 843 { 844 /* replace 5 by 4 */ 845 (void) sm_snprintf(eb, spaceleft, "4%2.2s%c", num + 1, del); 846 } 847 else 848 (void) sm_snprintf(eb, spaceleft, "%3.3s%c", num, del); 849 eb += 4; 850 spaceleft -= 4; 851 852 if ((l = isenhsc(fmt, ' ' )) > 0 && l < spaceleft - 4) 853 { 854 /* copy enh.status code including trailing blank */ 855 l++; 856 (void) sm_strlcpy(eb, fmt, l + 1); 857 eb += l; 858 spaceleft -= l; 859 fmt += l; 860 } 861 else if ((l = isenhsc(enhsc, '\0')) > 0 && l < spaceleft - 4) 862 { 863 /* copy enh.status code */ 864 (void) sm_strlcpy(eb, enhsc, l + 1); 865 eb[l] = ' '; 866 eb[++l] = '\0'; 867 eb += l; 868 spaceleft -= l; 869 } 870 if (SoftBounce && eb[-l] == '5') 871 { 872 /* replace 5 by 4 */ 873 eb[-l] = '4'; 874 } 875 errtxt = eb; 876 877 /* output the file name and line number */ 878 if (FileName != NULL) 879 { 880 (void) sm_snprintf(eb, spaceleft, "%s: line %d: ", 881 shortenstring(FileName, 83), LineNumber); 882 eb += (l = strlen(eb)); 883 spaceleft -= l; 884 } 885 886 /* 887 ** output the "to" address only if it is defined and one of the 888 ** following codes is used: 889 ** 050 internal notices, e.g., alias expansion 890 ** 250 Ok 891 ** 252 Cannot VRFY user, but will accept message and attempt delivery 892 ** 450 Requested mail action not taken: mailbox unavailable 893 ** 550 Requested action not taken: mailbox unavailable 894 ** 553 Requested action not taken: mailbox name not allowed 895 ** 896 ** Notice: this still isn't "the right thing", this code shouldn't 897 ** (indirectly) depend on CurEnv->e_to. 898 */ 899 900 if (to != NULL && to[0] != '\0' && 901 (strncmp(num, "050", 3) == 0 || 902 strncmp(num, "250", 3) == 0 || 903 strncmp(num, "252", 3) == 0 || 904 strncmp(num, "450", 3) == 0 || 905 strncmp(num, "550", 3) == 0 || 906 strncmp(num, "553", 3) == 0)) 907 { 908 (void) sm_strlcpyn(eb, spaceleft, 2, 909 shortenstring(to, MAXSHORTSTR), "... "); 910 spaceleft -= strlen(eb); 911 while (*eb != '\0') 912 *eb++ &= 0177; 913 } 914 915 /* output the message */ 916 (void) sm_vsnprintf(eb, spaceleft, fmt, ap); 917 spaceleft -= strlen(eb); 918 while (*eb != '\0') 919 *eb++ &= 0177; 920 921 /* output the error code, if any */ 922 if (eno != 0) 923 (void) sm_strlcpyn(eb, spaceleft, 2, ": ", sm_errstring(eno)); 924 925 return errtxt; 926 } 927 /* 928 ** BUFFER_ERRORS -- arrange to buffer future error messages 929 ** 930 ** Parameters: 931 ** none 932 ** 933 ** Returns: 934 ** none. 935 */ 936 937 void 938 buffer_errors() 939 { 940 HeldMessageBuf[0] = '\0'; 941 HoldErrs = true; 942 } 943 /* 944 ** FLUSH_ERRORS -- flush the held error message buffer 945 ** 946 ** Parameters: 947 ** print -- if set, print the message, otherwise just 948 ** delete it. 949 ** 950 ** Returns: 951 ** none. 952 */ 953 954 void 955 flush_errors(print) 956 bool print; 957 { 958 if (print && HeldMessageBuf[0] != '\0') 959 putoutmsg(HeldMessageBuf, false, true); 960 HeldMessageBuf[0] = '\0'; 961 HoldErrs = false; 962 } 963 /* 964 ** SM_ERRSTRING -- return string description of error code 965 ** 966 ** Parameters: 967 ** errnum -- the error number to translate 968 ** 969 ** Returns: 970 ** A string description of errnum. 971 ** 972 ** Side Effects: 973 ** none. 974 */ 975 976 const char * 977 sm_errstring(errnum) 978 int errnum; 979 { 980 char *dnsmsg; 981 char *bp; 982 static char buf[MAXLINE]; 983 #if HASSTRERROR 984 char *err; 985 char errbuf[30]; 986 #endif /* HASSTRERROR */ 987 #if !HASSTRERROR && !defined(ERRLIST_PREDEFINED) 988 extern char *sys_errlist[]; 989 extern int sys_nerr; 990 #endif /* !HASSTRERROR && !defined(ERRLIST_PREDEFINED) */ 991 992 /* 993 ** Handle special network error codes. 994 ** 995 ** These are 4.2/4.3bsd specific; they should be in daemon.c. 996 */ 997 998 dnsmsg = NULL; 999 switch (errnum) 1000 { 1001 case ETIMEDOUT: 1002 case ECONNRESET: 1003 bp = buf; 1004 #if HASSTRERROR 1005 err = strerror(errnum); 1006 if (err == NULL) 1007 { 1008 (void) sm_snprintf(errbuf, sizeof(errbuf), 1009 "Error %d", errnum); 1010 err = errbuf; 1011 } 1012 (void) sm_strlcpy(bp, err, SPACELEFT(buf, bp)); 1013 #else /* HASSTRERROR */ 1014 if (errnum >= 0 && errnum < sys_nerr) 1015 (void) sm_strlcpy(bp, sys_errlist[errnum], 1016 SPACELEFT(buf, bp)); 1017 else 1018 (void) sm_snprintf(bp, SPACELEFT(buf, bp), 1019 "Error %d", errnum); 1020 #endif /* HASSTRERROR */ 1021 bp += strlen(bp); 1022 if (CurHostName != NULL) 1023 { 1024 if (errnum == ETIMEDOUT) 1025 { 1026 (void) sm_snprintf(bp, SPACELEFT(buf, bp), 1027 " with "); 1028 bp += strlen(bp); 1029 } 1030 else 1031 { 1032 bp = buf; 1033 (void) sm_snprintf(bp, SPACELEFT(buf, bp), 1034 "Connection reset by "); 1035 bp += strlen(bp); 1036 } 1037 (void) sm_strlcpy(bp, 1038 shortenstring(CurHostName, MAXSHORTSTR), 1039 SPACELEFT(buf, bp)); 1040 bp += strlen(buf); 1041 } 1042 if (SmtpPhase != NULL) 1043 { 1044 (void) sm_snprintf(bp, SPACELEFT(buf, bp), 1045 " during %s", SmtpPhase); 1046 } 1047 return buf; 1048 1049 case EHOSTDOWN: 1050 if (CurHostName == NULL) 1051 break; 1052 (void) sm_snprintf(buf, sizeof(buf), "Host %s is down", 1053 shortenstring(CurHostName, MAXSHORTSTR)); 1054 return buf; 1055 1056 case ECONNREFUSED: 1057 if (CurHostName == NULL) 1058 break; 1059 (void) sm_strlcpyn(buf, sizeof(buf), 2, "Connection refused by ", 1060 shortenstring(CurHostName, MAXSHORTSTR)); 1061 return buf; 1062 1063 #if NAMED_BIND 1064 case HOST_NOT_FOUND + E_DNSBASE: 1065 dnsmsg = "host not found"; 1066 break; 1067 1068 case TRY_AGAIN + E_DNSBASE: 1069 dnsmsg = "host name lookup failure"; 1070 break; 1071 1072 case NO_RECOVERY + E_DNSBASE: 1073 dnsmsg = "non-recoverable error"; 1074 break; 1075 1076 case NO_DATA + E_DNSBASE: 1077 dnsmsg = "no data known"; 1078 break; 1079 #endif /* NAMED_BIND */ 1080 1081 case EPERM: 1082 /* SunOS gives "Not owner" -- this is the POSIX message */ 1083 return "Operation not permitted"; 1084 1085 /* 1086 ** Error messages used internally in sendmail. 1087 */ 1088 1089 case E_SM_OPENTIMEOUT: 1090 return "Timeout on file open"; 1091 1092 case E_SM_NOSLINK: 1093 return "Symbolic links not allowed"; 1094 1095 case E_SM_NOHLINK: 1096 return "Hard links not allowed"; 1097 1098 case E_SM_REGONLY: 1099 return "Regular files only"; 1100 1101 case E_SM_ISEXEC: 1102 return "Executable files not allowed"; 1103 1104 case E_SM_WWDIR: 1105 return "World writable directory"; 1106 1107 case E_SM_GWDIR: 1108 return "Group writable directory"; 1109 1110 case E_SM_FILECHANGE: 1111 return "File changed after open"; 1112 1113 case E_SM_WWFILE: 1114 return "World writable file"; 1115 1116 case E_SM_GWFILE: 1117 return "Group writable file"; 1118 1119 case E_SM_GRFILE: 1120 return "Group readable file"; 1121 1122 case E_SM_WRFILE: 1123 return "World readable file"; 1124 } 1125 1126 if (dnsmsg != NULL) 1127 { 1128 bp = buf; 1129 bp += sm_strlcpy(bp, "Name server: ", sizeof(buf)); 1130 if (CurHostName != NULL) 1131 { 1132 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, 1133 shortenstring(CurHostName, MAXSHORTSTR), ": "); 1134 bp += strlen(bp); 1135 } 1136 (void) sm_strlcpy(bp, dnsmsg, SPACELEFT(buf, bp)); 1137 return buf; 1138 } 1139 1140 #if LDAPMAP 1141 if (errnum >= E_LDAPBASE) 1142 return ldap_err2string(errnum - E_LDAPBASE); 1143 #endif /* LDAPMAP */ 1144 1145 #if HASSTRERROR 1146 err = strerror(errnum); 1147 if (err == NULL) 1148 { 1149 (void) sm_snprintf(buf, sizeof(buf), "Error %d", errnum); 1150 return buf; 1151 } 1152 return err; 1153 #else /* HASSTRERROR */ 1154 if (errnum > 0 && errnum < sys_nerr) 1155 return sys_errlist[errnum]; 1156 1157 (void) sm_snprintf(buf, sizeof(buf), "Error %d", errnum); 1158 return buf; 1159 #endif /* HASSTRERROR */ 1160 } 1161