1 /* 2 * Copyright (c) 1998-2003 Proofpoint, 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: alias.c,v 8.221 2013-11-22 20:51:54 ca Exp $") 17 18 #define SEPARATOR ':' 19 # define ALIAS_SPEC_SEPARATORS " ,/:" 20 21 static MAP *AliasFileMap = NULL; /* the actual aliases.files map */ 22 static int NAliasFileMaps; /* the number of entries in AliasFileMap */ 23 24 static char *aliaslookup __P((char *, int *, char *)); 25 26 /* 27 ** ALIAS -- Compute aliases. 28 ** 29 ** Scans the alias file for an alias for the given address. 30 ** If found, it arranges to deliver to the alias list instead. 31 ** Uses libdbm database if -DDBM. 32 ** 33 ** Parameters: 34 ** a -- address to alias. 35 ** sendq -- a pointer to the head of the send queue 36 ** to put the aliases in. 37 ** aliaslevel -- the current alias nesting depth. 38 ** e -- the current envelope. 39 ** 40 ** Returns: 41 ** none 42 ** 43 ** Side Effects: 44 ** Aliases found are expanded. 45 ** 46 ** Deficiencies: 47 ** It should complain about names that are aliased to 48 ** nothing. 49 */ 50 51 void 52 alias(a, sendq, aliaslevel, e) 53 register ADDRESS *a; 54 ADDRESS **sendq; 55 int aliaslevel; 56 register ENVELOPE *e; 57 { 58 register char *p; 59 char *owner; 60 auto int status = EX_OK; 61 char obuf[MAXNAME + 7]; 62 63 if (tTd(27, 1)) 64 sm_dprintf("alias(%s)\n", a->q_user); 65 66 /* don't realias already aliased names */ 67 if (!QS_IS_OK(a->q_state)) 68 return; 69 70 if (NoAlias) 71 return; 72 73 e->e_to = a->q_paddr; 74 75 /* 76 ** Look up this name. 77 ** 78 ** If the map was unavailable, we will queue this message 79 ** until the map becomes available; otherwise, we could 80 ** bounce messages inappropriately. 81 */ 82 83 #if _FFR_REDIRECTEMPTY 84 /* 85 ** envelope <> can't be sent to mailing lists, only owner- 86 ** send spam of this type to owner- of the list 87 ** ---- to stop spam from going to mailing lists! 88 */ 89 90 if (e->e_sender != NULL && *e->e_sender == '\0') 91 { 92 /* Look for owner of alias */ 93 (void) sm_strlcpyn(obuf, sizeof(obuf), 2, "owner-", a->q_user); 94 if (aliaslookup(obuf, &status, a->q_host) != NULL) 95 { 96 if (LogLevel > 8) 97 sm_syslog(LOG_WARNING, e->e_id, 98 "possible spam from <> to list: %s, redirected to %s\n", 99 a->q_user, obuf); 100 a->q_user = sm_rpool_strdup_x(e->e_rpool, obuf); 101 } 102 } 103 #endif /* _FFR_REDIRECTEMPTY */ 104 105 p = aliaslookup(a->q_user, &status, a->q_host); 106 if (status == EX_TEMPFAIL || status == EX_UNAVAILABLE) 107 { 108 a->q_state = QS_QUEUEUP; 109 if (e->e_message == NULL) 110 e->e_message = sm_rpool_strdup_x(e->e_rpool, 111 "alias database unavailable"); 112 113 /* XXX msg only per recipient? */ 114 if (a->q_message == NULL) 115 a->q_message = "alias database unavailable"; 116 return; 117 } 118 if (p == NULL) 119 return; 120 121 /* 122 ** Match on Alias. 123 ** Deliver to the target list. 124 */ 125 126 if (tTd(27, 1)) 127 sm_dprintf("%s (%s, %s) aliased to %s\n", 128 a->q_paddr, a->q_host, a->q_user, p); 129 if (bitset(EF_VRFYONLY, e->e_flags)) 130 { 131 a->q_state = QS_VERIFIED; 132 return; 133 } 134 message("aliased to %s", shortenstring(p, MAXSHORTSTR)); 135 if (LogLevel > 10) 136 sm_syslog(LOG_INFO, e->e_id, 137 "alias %.100s => %s", 138 a->q_paddr, shortenstring(p, MAXSHORTSTR)); 139 a->q_flags &= ~QSELFREF; 140 if (tTd(27, 5)) 141 { 142 sm_dprintf("alias: QS_EXPANDED "); 143 printaddr(sm_debug_file(), a, false); 144 } 145 a->q_state = QS_EXPANDED; 146 147 /* 148 ** Always deliver aliased items as the default user. 149 ** Setting q_gid to 0 forces deliver() to use DefUser 150 ** instead of the alias name for the call to initgroups(). 151 */ 152 153 a->q_uid = DefUid; 154 a->q_gid = 0; 155 a->q_fullname = NULL; 156 a->q_flags |= QGOODUID|QALIAS; 157 158 (void) sendtolist(p, a, sendq, aliaslevel + 1, e); 159 160 if (bitset(QSELFREF, a->q_flags) && QS_IS_EXPANDED(a->q_state)) 161 a->q_state = QS_OK; 162 163 /* 164 ** Look for owner of alias 165 */ 166 167 if (strncmp(a->q_user, "owner-", 6) == 0 || 168 strlen(a->q_user) > sizeof(obuf) - 7) 169 (void) sm_strlcpy(obuf, "owner-owner", sizeof(obuf)); 170 else 171 (void) sm_strlcpyn(obuf, sizeof(obuf), 2, "owner-", a->q_user); 172 owner = aliaslookup(obuf, &status, a->q_host); 173 if (owner == NULL) 174 return; 175 176 /* reflect owner into envelope sender */ 177 if (strpbrk(owner, ",:/|\"") != NULL) 178 owner = obuf; 179 a->q_owner = sm_rpool_strdup_x(e->e_rpool, owner); 180 181 /* announce delivery to this alias; NORECEIPT bit set later */ 182 if (e->e_xfp != NULL) 183 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, 184 "Message delivered to mailing list %s\n", 185 a->q_paddr); 186 e->e_flags |= EF_SENDRECEIPT; 187 a->q_flags |= QDELIVERED|QEXPANDED; 188 } 189 /* 190 ** ALIASLOOKUP -- look up a name in the alias file. 191 ** 192 ** Parameters: 193 ** name -- the name to look up. 194 ** pstat -- a pointer to a place to put the status. 195 ** av -- argument for %1 expansion. 196 ** 197 ** Returns: 198 ** the value of name. 199 ** NULL if unknown. 200 ** 201 ** Side Effects: 202 ** none. 203 ** 204 ** Warnings: 205 ** The return value will be trashed across calls. 206 */ 207 208 static char * 209 aliaslookup(name, pstat, av) 210 char *name; 211 int *pstat; 212 char *av; 213 { 214 static MAP *map = NULL; 215 #if _FFR_ALIAS_DETAIL 216 int i; 217 char *argv[4]; 218 #endif /* _FFR_ALIAS_DETAIL */ 219 220 if (map == NULL) 221 { 222 STAB *s = stab("aliases", ST_MAP, ST_FIND); 223 224 if (s == NULL) 225 return NULL; 226 map = &s->s_map; 227 } 228 DYNOPENMAP(map); 229 230 /* special case POstMastER -- always use lower case */ 231 if (sm_strcasecmp(name, "postmaster") == 0) 232 name = "postmaster"; 233 234 #if _FFR_ALIAS_DETAIL 235 i = 0; 236 argv[i++] = name; 237 argv[i++] = av; 238 239 /* XXX '+' is hardwired here as delimiter! */ 240 if (av != NULL && *av == '+') 241 argv[i++] = av + 1; 242 argv[i++] = NULL; 243 return (*map->map_class->map_lookup)(map, name, argv, pstat); 244 #else /* _FFR_ALIAS_DETAIL */ 245 return (*map->map_class->map_lookup)(map, name, NULL, pstat); 246 #endif /* _FFR_ALIAS_DETAIL */ 247 } 248 /* 249 ** SETALIAS -- set up an alias map 250 ** 251 ** Called when reading configuration file. 252 ** 253 ** Parameters: 254 ** spec -- the alias specification 255 ** 256 ** Returns: 257 ** none. 258 */ 259 260 void 261 setalias(spec) 262 char *spec; 263 { 264 register char *p; 265 register MAP *map; 266 char *class; 267 STAB *s; 268 269 if (tTd(27, 8)) 270 sm_dprintf("setalias(%s)\n", spec); 271 272 for (p = spec; p != NULL; ) 273 { 274 char buf[50]; 275 276 while (isascii(*p) && isspace(*p)) 277 p++; 278 if (*p == '\0') 279 break; 280 spec = p; 281 282 if (NAliasFileMaps >= MAXMAPSTACK) 283 { 284 syserr("Too many alias databases defined, %d max", 285 MAXMAPSTACK); 286 return; 287 } 288 if (AliasFileMap == NULL) 289 { 290 (void) sm_strlcpy(buf, "aliases.files sequence", 291 sizeof(buf)); 292 AliasFileMap = makemapentry(buf); 293 if (AliasFileMap == NULL) 294 { 295 syserr("setalias: cannot create aliases.files map"); 296 return; 297 } 298 } 299 (void) sm_snprintf(buf, sizeof(buf), "Alias%d", NAliasFileMaps); 300 s = stab(buf, ST_MAP, ST_ENTER); 301 map = &s->s_map; 302 memset(map, '\0', sizeof(*map)); 303 map->map_mname = s->s_name; 304 p = strpbrk(p, ALIAS_SPEC_SEPARATORS); 305 if (p != NULL && *p == SEPARATOR) 306 { 307 /* map name */ 308 *p++ = '\0'; 309 class = spec; 310 spec = p; 311 } 312 else 313 { 314 class = "implicit"; 315 map->map_mflags = MF_INCLNULL; 316 } 317 318 /* find end of spec */ 319 if (p != NULL) 320 { 321 bool quoted = false; 322 323 for (; *p != '\0'; p++) 324 { 325 /* 326 ** Don't break into a quoted string. 327 ** Needed for ldap maps which use 328 ** commas in their specifications. 329 */ 330 331 if (*p == '"') 332 quoted = !quoted; 333 else if (*p == ',' && !quoted) 334 break; 335 } 336 337 /* No more alias specifications follow */ 338 if (*p == '\0') 339 p = NULL; 340 } 341 if (p != NULL) 342 *p++ = '\0'; 343 344 if (tTd(27, 20)) 345 sm_dprintf(" map %s:%s %s\n", class, s->s_name, spec); 346 347 /* look up class */ 348 s = stab(class, ST_MAPCLASS, ST_FIND); 349 if (s == NULL) 350 { 351 syserr("setalias: unknown alias class %s", class); 352 } 353 else if (!bitset(MCF_ALIASOK, s->s_mapclass.map_cflags)) 354 { 355 syserr("setalias: map class %s can't handle aliases", 356 class); 357 } 358 else 359 { 360 map->map_class = &s->s_mapclass; 361 map->map_mflags |= MF_ALIAS; 362 if (map->map_class->map_parse(map, spec)) 363 { 364 map->map_mflags |= MF_VALID; 365 AliasFileMap->map_stack[NAliasFileMaps++] = map; 366 } 367 } 368 } 369 } 370 /* 371 ** ALIASWAIT -- wait for distinguished @:@ token to appear. 372 ** 373 ** This can decide to reopen or rebuild the alias file 374 ** 375 ** Parameters: 376 ** map -- a pointer to the map descriptor for this alias file. 377 ** ext -- the filename extension (e.g., ".db") for the 378 ** database file. 379 ** isopen -- if set, the database is already open, and we 380 ** should check for validity; otherwise, we are 381 ** just checking to see if it should be created. 382 ** 383 ** Returns: 384 ** true -- if the database is open when we return. 385 ** false -- if the database is closed when we return. 386 */ 387 388 bool 389 aliaswait(map, ext, isopen) 390 MAP *map; 391 char *ext; 392 bool isopen; 393 { 394 bool attimeout = false; 395 time_t mtime; 396 struct stat stb; 397 char buf[MAXPATHLEN]; 398 399 if (tTd(27, 3)) 400 sm_dprintf("aliaswait(%s:%s)\n", 401 map->map_class->map_cname, map->map_file); 402 if (bitset(MF_ALIASWAIT, map->map_mflags)) 403 return isopen; 404 map->map_mflags |= MF_ALIASWAIT; 405 406 if (SafeAlias > 0) 407 { 408 auto int st; 409 unsigned int sleeptime = 2; 410 unsigned int loopcount = 0; /* only used for debugging */ 411 time_t toolong = curtime() + SafeAlias; 412 413 while (isopen && 414 map->map_class->map_lookup(map, "@", NULL, &st) == NULL) 415 { 416 if (curtime() > toolong) 417 { 418 /* we timed out */ 419 attimeout = true; 420 break; 421 } 422 423 /* 424 ** Close and re-open the alias database in case 425 ** the one is mv'ed instead of cp'ed in. 426 */ 427 428 if (tTd(27, 2)) 429 { 430 loopcount++; 431 sm_dprintf("aliaswait: sleeping for %u seconds (loopcount = %u)\n", 432 sleeptime, loopcount); 433 } 434 435 map->map_mflags |= MF_CLOSING; 436 map->map_class->map_close(map); 437 map->map_mflags &= ~(MF_OPEN|MF_WRITABLE|MF_CLOSING); 438 (void) sleep(sleeptime); 439 sleeptime *= 2; 440 if (sleeptime > 60) 441 sleeptime = 60; 442 isopen = map->map_class->map_open(map, O_RDONLY); 443 } 444 } 445 446 /* see if we need to go into auto-rebuild mode */ 447 if (!bitset(MCF_REBUILDABLE, map->map_class->map_cflags)) 448 { 449 if (tTd(27, 3)) 450 sm_dprintf("aliaswait: not rebuildable\n"); 451 map->map_mflags &= ~MF_ALIASWAIT; 452 return isopen; 453 } 454 if (stat(map->map_file, &stb) < 0) 455 { 456 if (tTd(27, 3)) 457 sm_dprintf("aliaswait: no source file\n"); 458 map->map_mflags &= ~MF_ALIASWAIT; 459 return isopen; 460 } 461 mtime = stb.st_mtime; 462 if (sm_strlcpyn(buf, sizeof(buf), 2, 463 map->map_file, ext == NULL ? "" : ext) >= sizeof(buf)) 464 { 465 if (LogLevel > 3) 466 sm_syslog(LOG_INFO, NOQID, 467 "alias database %s%s name too long", 468 map->map_file, ext == NULL ? "" : ext); 469 message("alias database %s%s name too long", 470 map->map_file, ext == NULL ? "" : ext); 471 } 472 473 if (stat(buf, &stb) < 0 || stb.st_mtime < mtime || attimeout) 474 { 475 if (LogLevel > 3) 476 sm_syslog(LOG_INFO, NOQID, 477 "alias database %s out of date", buf); 478 message("Warning: alias database %s out of date", buf); 479 } 480 map->map_mflags &= ~MF_ALIASWAIT; 481 return isopen; 482 } 483 /* 484 ** REBUILDALIASES -- rebuild the alias database. 485 ** 486 ** Parameters: 487 ** map -- the database to rebuild. 488 ** automatic -- set if this was automatically generated. 489 ** 490 ** Returns: 491 ** true if successful; false otherwise. 492 ** 493 ** Side Effects: 494 ** Reads the text version of the database, builds the 495 ** DBM or DB version. 496 */ 497 498 bool 499 rebuildaliases(map, automatic) 500 register MAP *map; 501 bool automatic; 502 { 503 SM_FILE_T *af; 504 bool nolock = false; 505 bool success = false; 506 long sff = SFF_OPENASROOT|SFF_REGONLY|SFF_NOLOCK; 507 sigfunc_t oldsigint, oldsigquit; 508 #ifdef SIGTSTP 509 sigfunc_t oldsigtstp; 510 #endif /* SIGTSTP */ 511 512 if (!bitset(MCF_REBUILDABLE, map->map_class->map_cflags)) 513 return false; 514 515 if (!bitnset(DBS_LINKEDALIASFILEINWRITABLEDIR, DontBlameSendmail)) 516 sff |= SFF_NOWLINK; 517 if (!bitnset(DBS_GROUPWRITABLEALIASFILE, DontBlameSendmail)) 518 sff |= SFF_NOGWFILES; 519 if (!bitnset(DBS_WORLDWRITABLEALIASFILE, DontBlameSendmail)) 520 sff |= SFF_NOWWFILES; 521 522 /* try to lock the source file */ 523 if ((af = safefopen(map->map_file, O_RDWR, 0, sff)) == NULL) 524 { 525 struct stat stb; 526 527 if ((errno != EACCES && errno != EROFS) || automatic || 528 (af = safefopen(map->map_file, O_RDONLY, 0, sff)) == NULL) 529 { 530 int saveerr = errno; 531 532 if (tTd(27, 1)) 533 sm_dprintf("Can't open %s: %s\n", 534 map->map_file, sm_errstring(saveerr)); 535 if (!automatic && !bitset(MF_OPTIONAL, map->map_mflags)) 536 message("newaliases: cannot open %s: %s", 537 map->map_file, sm_errstring(saveerr)); 538 errno = 0; 539 return false; 540 } 541 nolock = true; 542 if (tTd(27, 1) || 543 fstat(sm_io_getinfo(af, SM_IO_WHAT_FD, NULL), &stb) < 0 || 544 bitset(S_IWUSR|S_IWGRP|S_IWOTH, stb.st_mode)) 545 message("warning: cannot lock %s: %s", 546 map->map_file, sm_errstring(errno)); 547 } 548 549 /* see if someone else is rebuilding the alias file */ 550 if (!nolock && 551 !lockfile(sm_io_getinfo(af, SM_IO_WHAT_FD, NULL), map->map_file, 552 NULL, LOCK_EX|LOCK_NB)) 553 { 554 /* yes, they are -- wait until done */ 555 message("Alias file %s is locked (maybe being rebuilt)", 556 map->map_file); 557 if (OpMode != MD_INITALIAS) 558 { 559 /* wait for other rebuild to complete */ 560 (void) lockfile(sm_io_getinfo(af, SM_IO_WHAT_FD, NULL), 561 map->map_file, NULL, LOCK_EX); 562 } 563 (void) sm_io_close(af, SM_TIME_DEFAULT); 564 errno = 0; 565 return false; 566 } 567 568 oldsigint = sm_signal(SIGINT, SIG_IGN); 569 oldsigquit = sm_signal(SIGQUIT, SIG_IGN); 570 #ifdef SIGTSTP 571 oldsigtstp = sm_signal(SIGTSTP, SIG_IGN); 572 #endif /* SIGTSTP */ 573 574 if (map->map_class->map_open(map, O_RDWR)) 575 { 576 if (LogLevel > 7) 577 { 578 sm_syslog(LOG_NOTICE, NOQID, 579 "alias database %s %srebuilt by %s", 580 map->map_file, automatic ? "auto" : "", 581 username()); 582 } 583 map->map_mflags |= MF_OPEN|MF_WRITABLE; 584 map->map_pid = CurrentPid; 585 readaliases(map, af, !automatic, true); 586 success = true; 587 } 588 else 589 { 590 if (tTd(27, 1)) 591 sm_dprintf("Can't create database for %s: %s\n", 592 map->map_file, sm_errstring(errno)); 593 if (!automatic) 594 syserr("Cannot create database for alias file %s", 595 map->map_file); 596 } 597 598 /* close the file, thus releasing locks */ 599 (void) sm_io_close(af, SM_TIME_DEFAULT); 600 601 /* add distinguished entries and close the database */ 602 if (bitset(MF_OPEN, map->map_mflags)) 603 { 604 map->map_mflags |= MF_CLOSING; 605 map->map_class->map_close(map); 606 map->map_mflags &= ~(MF_OPEN|MF_WRITABLE|MF_CLOSING); 607 } 608 609 /* restore the old signals */ 610 (void) sm_signal(SIGINT, oldsigint); 611 (void) sm_signal(SIGQUIT, oldsigquit); 612 #ifdef SIGTSTP 613 (void) sm_signal(SIGTSTP, oldsigtstp); 614 #endif /* SIGTSTP */ 615 return success; 616 } 617 /* 618 ** READALIASES -- read and process the alias file. 619 ** 620 ** This routine implements the part of initaliases that occurs 621 ** when we are not going to use the DBM stuff. 622 ** 623 ** Parameters: 624 ** map -- the alias database descriptor. 625 ** af -- file to read the aliases from. 626 ** announcestats -- announce statistics regarding number of 627 ** aliases, longest alias, etc. 628 ** logstats -- lot the same info. 629 ** 630 ** Returns: 631 ** none. 632 ** 633 ** Side Effects: 634 ** Reads aliasfile into the symbol table. 635 ** Optionally, builds the .dir & .pag files. 636 */ 637 638 void 639 readaliases(map, af, announcestats, logstats) 640 register MAP *map; 641 SM_FILE_T *af; 642 bool announcestats; 643 bool logstats; 644 { 645 register char *p; 646 char *rhs; 647 bool skipping; 648 long naliases, bytes, longest; 649 ADDRESS al, bl; 650 char line[BUFSIZ]; 651 652 /* 653 ** Read and interpret lines 654 */ 655 656 FileName = map->map_file; 657 LineNumber = 0; 658 naliases = bytes = longest = 0; 659 skipping = false; 660 while (sm_io_fgets(af, SM_TIME_DEFAULT, line, sizeof(line)) >= 0) 661 { 662 int lhssize, rhssize; 663 int c; 664 665 LineNumber++; 666 p = strchr(line, '\n'); 667 668 /* XXX what if line="a\\" ? */ 669 while (p != NULL && p > line && p[-1] == '\\') 670 { 671 p--; 672 if (sm_io_fgets(af, SM_TIME_DEFAULT, p, 673 SPACELEFT(line, p)) < 0) 674 break; 675 LineNumber++; 676 p = strchr(p, '\n'); 677 } 678 if (p != NULL) 679 *p = '\0'; 680 else if (!sm_io_eof(af)) 681 { 682 errno = 0; 683 syserr("554 5.3.0 alias line too long"); 684 685 /* flush to end of line */ 686 while ((c = sm_io_getc(af, SM_TIME_DEFAULT)) != 687 SM_IO_EOF && c != '\n') 688 continue; 689 690 /* skip any continuation lines */ 691 skipping = true; 692 continue; 693 } 694 switch (line[0]) 695 { 696 case '#': 697 case '\0': 698 skipping = false; 699 continue; 700 701 case ' ': 702 case '\t': 703 if (!skipping) 704 syserr("554 5.3.5 Non-continuation line starts with space"); 705 skipping = true; 706 continue; 707 } 708 skipping = false; 709 710 /* 711 ** Process the LHS 712 ** Find the colon separator, and parse the address. 713 ** It should resolve to a local name -- this will 714 ** be checked later (we want to optionally do 715 ** parsing of the RHS first to maximize error 716 ** detection). 717 */ 718 719 for (p = line; *p != '\0' && *p != ':' && *p != '\n'; p++) 720 continue; 721 if (*p++ != ':') 722 { 723 syserr("554 5.3.5 missing colon"); 724 continue; 725 } 726 if (parseaddr(line, &al, RF_COPYALL, ':', NULL, CurEnv, true) 727 == NULL) 728 { 729 syserr("554 5.3.5 %.40s... illegal alias name", line); 730 continue; 731 } 732 733 /* 734 ** Process the RHS. 735 ** 'al' is the internal form of the LHS address. 736 ** 'p' points to the text of the RHS. 737 */ 738 739 while (isascii(*p) && isspace(*p)) 740 p++; 741 rhs = p; 742 for (;;) 743 { 744 register char *nlp; 745 746 nlp = &p[strlen(p)]; 747 if (nlp > p && nlp[-1] == '\n') 748 *--nlp = '\0'; 749 750 if (CheckAliases) 751 { 752 /* do parsing & compression of addresses */ 753 while (*p != '\0') 754 { 755 auto char *delimptr; 756 757 while ((isascii(*p) && isspace(*p)) || 758 *p == ',') 759 p++; 760 if (*p == '\0') 761 break; 762 if (parseaddr(p, &bl, RF_COPYNONE, ',', 763 &delimptr, CurEnv, true) 764 == NULL) 765 usrerr("553 5.3.5 %s... bad address", p); 766 p = delimptr; 767 } 768 } 769 else 770 { 771 p = nlp; 772 } 773 774 /* see if there should be a continuation line */ 775 c = sm_io_getc(af, SM_TIME_DEFAULT); 776 if (!sm_io_eof(af)) 777 (void) sm_io_ungetc(af, SM_TIME_DEFAULT, c); 778 if (c != ' ' && c != '\t') 779 break; 780 781 /* read continuation line */ 782 if (sm_io_fgets(af, SM_TIME_DEFAULT, p, 783 sizeof(line) - (p-line)) < 0) 784 break; 785 LineNumber++; 786 787 /* check for line overflow */ 788 if (strchr(p, '\n') == NULL && !sm_io_eof(af)) 789 { 790 usrerr("554 5.3.5 alias too long"); 791 while ((c = sm_io_getc(af, SM_TIME_DEFAULT)) 792 != SM_IO_EOF && c != '\n') 793 continue; 794 skipping = true; 795 break; 796 } 797 } 798 799 if (skipping) 800 continue; 801 802 if (!bitnset(M_ALIASABLE, al.q_mailer->m_flags)) 803 { 804 syserr("554 5.3.5 %s... cannot alias non-local names", 805 al.q_paddr); 806 continue; 807 } 808 809 /* 810 ** Insert alias into symbol table or database file. 811 ** 812 ** Special case pOStmaStER -- always make it lower case. 813 */ 814 815 if (sm_strcasecmp(al.q_user, "postmaster") == 0) 816 makelower(al.q_user); 817 818 lhssize = strlen(al.q_user); 819 rhssize = strlen(rhs); 820 if (rhssize > 0) 821 { 822 /* is RHS empty (just spaces)? */ 823 p = rhs; 824 while (isascii(*p) && isspace(*p)) 825 p++; 826 } 827 if (rhssize == 0 || *p == '\0') 828 { 829 syserr("554 5.3.5 %.40s... missing value for alias", 830 line); 831 832 } 833 else 834 { 835 map->map_class->map_store(map, al.q_user, rhs); 836 837 /* statistics */ 838 naliases++; 839 bytes += lhssize + rhssize; 840 if (rhssize > longest) 841 longest = rhssize; 842 } 843 844 #if 0 845 /* 846 ** address strings are now stored in the envelope rpool, 847 ** and therefore cannot be freed. 848 */ 849 if (al.q_paddr != NULL) 850 sm_free(al.q_paddr); /* disabled */ 851 if (al.q_host != NULL) 852 sm_free(al.q_host); /* disabled */ 853 if (al.q_user != NULL) 854 sm_free(al.q_user); /* disabled */ 855 #endif /* 0 */ 856 } 857 858 CurEnv->e_to = NULL; 859 FileName = NULL; 860 if (Verbose || announcestats) 861 message("%s: %ld aliases, longest %ld bytes, %ld bytes total", 862 map->map_file, naliases, longest, bytes); 863 if (LogLevel > 7 && logstats) 864 sm_syslog(LOG_INFO, NOQID, 865 "%s: %ld aliases, longest %ld bytes, %ld bytes total", 866 map->map_file, naliases, longest, bytes); 867 } 868 /* 869 ** FORWARD -- Try to forward mail 870 ** 871 ** This is similar but not identical to aliasing. 872 ** 873 ** Parameters: 874 ** user -- the name of the user who's mail we would like 875 ** to forward to. It must have been verified -- 876 ** i.e., the q_home field must have been filled 877 ** in. 878 ** sendq -- a pointer to the head of the send queue to 879 ** put this user's aliases in. 880 ** aliaslevel -- the current alias nesting depth. 881 ** e -- the current envelope. 882 ** 883 ** Returns: 884 ** none. 885 ** 886 ** Side Effects: 887 ** New names are added to send queues. 888 */ 889 890 void 891 forward(user, sendq, aliaslevel, e) 892 ADDRESS *user; 893 ADDRESS **sendq; 894 int aliaslevel; 895 register ENVELOPE *e; 896 { 897 char *pp; 898 char *ep; 899 bool got_transient; 900 901 if (tTd(27, 1)) 902 sm_dprintf("forward(%s)\n", user->q_paddr); 903 904 if (!bitnset(M_HASPWENT, user->q_mailer->m_flags) || 905 !QS_IS_OK(user->q_state)) 906 return; 907 if (ForwardPath != NULL && *ForwardPath == '\0') 908 return; 909 if (user->q_home == NULL) 910 { 911 syserr("554 5.3.0 forward: no home"); 912 user->q_home = "/no/such/directory"; 913 } 914 915 /* good address -- look for .forward file in home */ 916 macdefine(&e->e_macro, A_PERM, 'z', user->q_home); 917 macdefine(&e->e_macro, A_PERM, 'u', user->q_user); 918 macdefine(&e->e_macro, A_PERM, 'h', user->q_host); 919 if (ForwardPath == NULL) 920 ForwardPath = newstr("\201z/.forward"); 921 922 got_transient = false; 923 for (pp = ForwardPath; pp != NULL; pp = ep) 924 { 925 int err; 926 char buf[MAXPATHLEN]; 927 struct stat st; 928 929 ep = strchr(pp, SEPARATOR); 930 if (ep != NULL) 931 *ep = '\0'; 932 expand(pp, buf, sizeof(buf), e); 933 if (ep != NULL) 934 *ep++ = SEPARATOR; 935 if (buf[0] == '\0') 936 continue; 937 if (tTd(27, 3)) 938 sm_dprintf("forward: trying %s\n", buf); 939 940 err = include(buf, true, user, sendq, aliaslevel, e); 941 if (err == 0) 942 break; 943 else if (transienterror(err)) 944 { 945 /* we may have to suspend this message */ 946 got_transient = true; 947 if (tTd(27, 2)) 948 sm_dprintf("forward: transient error on %s\n", 949 buf); 950 if (LogLevel > 2) 951 { 952 char *curhost = CurHostName; 953 954 CurHostName = NULL; 955 sm_syslog(LOG_ERR, e->e_id, 956 "forward %s: transient error: %s", 957 buf, sm_errstring(err)); 958 CurHostName = curhost; 959 } 960 961 } 962 else 963 { 964 switch (err) 965 { 966 case ENOENT: 967 break; 968 969 case E_SM_WWDIR: 970 case E_SM_GWDIR: 971 /* check if it even exists */ 972 if (stat(buf, &st) < 0 && errno == ENOENT) 973 { 974 if (bitnset(DBS_DONTWARNFORWARDFILEINUNSAFEDIRPATH, 975 DontBlameSendmail)) 976 break; 977 } 978 /* FALLTHROUGH */ 979 980 #if _FFR_FORWARD_SYSERR 981 case E_SM_NOSLINK: 982 case E_SM_NOHLINK: 983 case E_SM_REGONLY: 984 case E_SM_ISEXEC: 985 case E_SM_WWFILE: 986 case E_SM_GWFILE: 987 syserr("forward: %s: %s", buf, sm_errstring(err)); 988 break; 989 #endif /* _FFR_FORWARD_SYSERR */ 990 991 default: 992 if (LogLevel > (RunAsUid == 0 ? 2 : 10)) 993 sm_syslog(LOG_WARNING, e->e_id, 994 "forward %s: %s", buf, 995 sm_errstring(err)); 996 if (Verbose) 997 message("forward: %s: %s", 998 buf, sm_errstring(err)); 999 break; 1000 } 1001 } 1002 } 1003 if (pp == NULL && got_transient) 1004 { 1005 /* 1006 ** There was no successful .forward open and at least one 1007 ** transient open. We have to defer this address for 1008 ** further delivery. 1009 */ 1010 1011 message("transient .forward open error: message queued"); 1012 user->q_state = QS_QUEUEUP; 1013 return; 1014 } 1015 } 1016