1 /* 2 * Copyright (c) 1992, 1995 Eric P. Allman. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * %sccs.include.redist.c% 7 */ 8 9 #ifndef lint 10 static char sccsid[] = "@(#)map.c 8.63 (Berkeley) 05/23/95"; 11 #endif /* not lint */ 12 13 #include "sendmail.h" 14 15 #ifdef NDBM 16 # include <ndbm.h> 17 #endif 18 #ifdef NEWDB 19 # include <db.h> 20 #endif 21 #ifdef NIS 22 struct dom_binding { int dummy; }; /* needed on IRIX */ 23 # include <rpcsvc/ypclnt.h> 24 #endif 25 26 /* 27 ** MAP.C -- implementations for various map classes. 28 ** 29 ** Each map class implements a series of functions: 30 ** 31 ** bool map_parse(MAP *map, char *args) 32 ** Parse the arguments from the config file. Return TRUE 33 ** if they were ok, FALSE otherwise. Fill in map with the 34 ** values. 35 ** 36 ** char *map_lookup(MAP *map, char *key, char **args, int *pstat) 37 ** Look up the key in the given map. If found, do any 38 ** rewriting the map wants (including "args" if desired) 39 ** and return the value. Set *pstat to the appropriate status 40 ** on error and return NULL. Args will be NULL if called 41 ** from the alias routines, although this should probably 42 ** not be relied upon. It is suggested you call map_rewrite 43 ** to return the results -- it takes care of null termination 44 ** and uses a dynamically expanded buffer as needed. 45 ** 46 ** void map_store(MAP *map, char *key, char *value) 47 ** Store the key:value pair in the map. 48 ** 49 ** bool map_open(MAP *map, int mode) 50 ** Open the map for the indicated mode. Mode should 51 ** be either O_RDONLY or O_RDWR. Return TRUE if it 52 ** was opened successfully, FALSE otherwise. If the open 53 ** failed an the MF_OPTIONAL flag is not set, it should 54 ** also print an error. If the MF_ALIAS bit is set 55 ** and this map class understands the @:@ convention, it 56 ** should call aliaswait() before returning. 57 ** 58 ** void map_close(MAP *map) 59 ** Close the map. 60 ** 61 ** This file also includes the implementation for getcanonname. 62 ** It is currently implemented in a pretty ad-hoc manner; it ought 63 ** to be more properly integrated into the map structure. 64 */ 65 66 #define DBMMODE 0644 67 68 extern bool aliaswait __P((MAP *, char *, int)); 69 /* 70 ** MAP_PARSEARGS -- parse config line arguments for database lookup 71 ** 72 ** This is a generic version of the map_parse method. 73 ** 74 ** Parameters: 75 ** map -- the map being initialized. 76 ** ap -- a pointer to the args on the config line. 77 ** 78 ** Returns: 79 ** TRUE -- if everything parsed OK. 80 ** FALSE -- otherwise. 81 ** 82 ** Side Effects: 83 ** null terminates the filename; stores it in map 84 */ 85 86 bool 87 map_parseargs(map, ap) 88 MAP *map; 89 char *ap; 90 { 91 register char *p = ap; 92 93 map->map_mflags |= MF_TRY0NULL | MF_TRY1NULL; 94 for (;;) 95 { 96 while (isascii(*p) && isspace(*p)) 97 p++; 98 if (*p != '-') 99 break; 100 switch (*++p) 101 { 102 case 'N': 103 map->map_mflags |= MF_INCLNULL; 104 map->map_mflags &= ~MF_TRY0NULL; 105 break; 106 107 case 'O': 108 map->map_mflags &= ~MF_TRY1NULL; 109 break; 110 111 case 'o': 112 map->map_mflags |= MF_OPTIONAL; 113 break; 114 115 case 'f': 116 map->map_mflags |= MF_NOFOLDCASE; 117 break; 118 119 case 'm': 120 map->map_mflags |= MF_MATCHONLY; 121 break; 122 123 case 'A': 124 map->map_mflags |= MF_APPEND; 125 break; 126 127 case 'a': 128 map->map_app = ++p; 129 break; 130 131 case 'k': 132 while (isascii(*++p) && isspace(*p)) 133 continue; 134 map->map_keycolnm = p; 135 break; 136 137 case 'v': 138 while (isascii(*++p) && isspace(*p)) 139 continue; 140 map->map_valcolnm = p; 141 break; 142 143 case 'z': 144 if (*++p != '\\') 145 map->map_coldelim = *p; 146 else 147 { 148 switch (*++p) 149 { 150 case 'n': 151 map->map_coldelim = '\n'; 152 break; 153 154 case 't': 155 map->map_coldelim = '\t'; 156 break; 157 158 default: 159 map->map_coldelim = '\\'; 160 } 161 } 162 break; 163 #ifdef RESERVED_FOR_SUN 164 case 'd': 165 map->map_mflags |= MF_DOMAIN_WIDE; 166 break; 167 168 case 's': 169 /* info type */ 170 break; 171 #endif 172 } 173 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 174 p++; 175 if (*p != '\0') 176 *p++ = '\0'; 177 } 178 if (map->map_app != NULL) 179 map->map_app = newstr(map->map_app); 180 if (map->map_keycolnm != NULL) 181 map->map_keycolnm = newstr(map->map_keycolnm); 182 if (map->map_valcolnm != NULL) 183 map->map_valcolnm = newstr(map->map_valcolnm); 184 185 if (*p != '\0') 186 { 187 map->map_file = p; 188 while (*p != '\0' && !(isascii(*p) && isspace(*p))) 189 p++; 190 if (*p != '\0') 191 *p++ = '\0'; 192 map->map_file = newstr(map->map_file); 193 } 194 195 while (*p != '\0' && isascii(*p) && isspace(*p)) 196 p++; 197 if (*p != '\0') 198 map->map_rebuild = newstr(p); 199 200 if (map->map_file == NULL && 201 !bitset(MCF_OPTFILE, map->map_class->map_cflags)) 202 { 203 syserr("No file name for %s map %s", 204 map->map_class->map_cname, map->map_mname); 205 return FALSE; 206 } 207 return TRUE; 208 } 209 /* 210 ** MAP_REWRITE -- rewrite a database key, interpolating %n indications. 211 ** 212 ** It also adds the map_app string. It can be used as a utility 213 ** in the map_lookup method. 214 ** 215 ** Parameters: 216 ** map -- the map that causes this. 217 ** s -- the string to rewrite, NOT necessarily null terminated. 218 ** slen -- the length of s. 219 ** av -- arguments to interpolate into buf. 220 ** 221 ** Returns: 222 ** Pointer to rewritten result. This is static data that 223 ** should be copied if it is to be saved! 224 ** 225 ** Side Effects: 226 ** none. 227 */ 228 229 char * 230 map_rewrite(map, s, slen, av) 231 register MAP *map; 232 register char *s; 233 int slen; 234 char **av; 235 { 236 register char *bp; 237 register char c; 238 char **avp; 239 register char *ap; 240 int i; 241 int len; 242 static int buflen = -1; 243 static char *buf = NULL; 244 245 if (tTd(39, 1)) 246 { 247 printf("map_rewrite(%.*s), av =", slen, s); 248 if (av == NULL) 249 printf(" (nullv)"); 250 else 251 { 252 for (avp = av; *avp != NULL; avp++) 253 printf("\n\t%s", *avp); 254 } 255 printf("\n"); 256 } 257 258 /* count expected size of output (can safely overestimate) */ 259 i = len = slen; 260 if (av != NULL) 261 { 262 bp = s; 263 for (i = slen; --i >= 0 && (c = *bp++) != 0; ) 264 { 265 if (c != '%') 266 continue; 267 if (--i < 0) 268 break; 269 c = *bp++; 270 if (!(isascii(c) && isdigit(c))) 271 continue; 272 for (avp = av; --c >= '0' && *avp != NULL; avp++) 273 continue; 274 if (*avp == NULL) 275 continue; 276 len += strlen(*avp); 277 } 278 } 279 if (map->map_app != NULL) 280 len += strlen(map->map_app); 281 if (buflen < ++len) 282 { 283 /* need to malloc additional space */ 284 buflen = len; 285 if (buf != NULL) 286 free(buf); 287 buf = xalloc(buflen); 288 } 289 290 bp = buf; 291 if (av == NULL) 292 { 293 bcopy(s, bp, slen); 294 bp += slen; 295 } 296 else 297 { 298 while (--slen >= 0 && (c = *s++) != '\0') 299 { 300 if (c != '%') 301 { 302 pushc: 303 *bp++ = c; 304 continue; 305 } 306 if (--slen < 0 || (c = *s++) == '\0') 307 c = '%'; 308 if (c == '%') 309 goto pushc; 310 if (!(isascii(c) && isdigit(c))) 311 { 312 *bp++ = '%'; 313 goto pushc; 314 } 315 for (avp = av; --c >= '0' && *avp != NULL; avp++) 316 continue; 317 if (*avp == NULL) 318 continue; 319 320 /* transliterate argument into output string */ 321 for (ap = *avp; (c = *ap++) != '\0'; ) 322 *bp++ = c; 323 } 324 } 325 if (map->map_app != NULL) 326 strcpy(bp, map->map_app); 327 else 328 *bp = '\0'; 329 if (tTd(39, 1)) 330 printf("map_rewrite => %s\n", buf); 331 return buf; 332 } 333 /* 334 ** INITMAPS -- initialize for aliasing 335 ** 336 ** Parameters: 337 ** rebuild -- if TRUE, this rebuilds the cached versions. 338 ** e -- current envelope. 339 ** 340 ** Returns: 341 ** none. 342 ** 343 ** Side Effects: 344 ** initializes aliases: 345 ** if NDBM: opens the database. 346 ** if ~NDBM: reads the aliases into the symbol table. 347 */ 348 349 initmaps(rebuild, e) 350 bool rebuild; 351 register ENVELOPE *e; 352 { 353 extern void map_init(); 354 355 #ifdef XDEBUG 356 checkfd012("entering initmaps"); 357 #endif 358 CurEnv = e; 359 if (rebuild) 360 { 361 stabapply(map_init, 1); 362 stabapply(map_init, 2); 363 } 364 else 365 { 366 stabapply(map_init, 0); 367 } 368 #ifdef XDEBUG 369 checkfd012("exiting initmaps"); 370 #endif 371 } 372 373 void 374 map_init(s, rebuild) 375 register STAB *s; 376 int rebuild; 377 { 378 register MAP *map; 379 380 /* has to be a map */ 381 if (s->s_type != ST_MAP) 382 return; 383 384 map = &s->s_map; 385 if (!bitset(MF_VALID, map->map_mflags)) 386 return; 387 388 if (tTd(38, 2)) 389 printf("map_init(%s:%s, %s, %d)\n", 390 map->map_class->map_cname == NULL ? "NULL" : 391 map->map_class->map_cname, 392 map->map_mname == NULL ? "NULL" : map->map_mname, 393 map->map_file == NULL ? "NULL" : map->map_file, 394 rebuild); 395 396 if (rebuild == (bitset(MF_ALIAS, map->map_mflags) && 397 bitset(MCF_REBUILDABLE, map->map_class->map_cflags) ? 1 : 2)) 398 { 399 if (tTd(38, 3)) 400 printf("\twrong pass\n"); 401 return; 402 } 403 404 /* if already open, close it (for nested open) */ 405 if (bitset(MF_OPEN, map->map_mflags)) 406 { 407 map->map_class->map_close(map); 408 map->map_mflags &= ~(MF_OPEN|MF_WRITABLE); 409 } 410 411 if (rebuild == 2) 412 { 413 rebuildaliases(map, FALSE); 414 } 415 else 416 { 417 if (map->map_class->map_open(map, O_RDONLY)) 418 { 419 if (tTd(38, 4)) 420 printf("\t%s:%s %s: valid\n", 421 map->map_class->map_cname == NULL ? "NULL" : 422 map->map_class->map_cname, 423 map->map_mname == NULL ? "NULL" : 424 map->map_mname, 425 map->map_file == NULL ? "NULL" : 426 map->map_file); 427 map->map_mflags |= MF_OPEN; 428 } 429 else 430 { 431 if (tTd(38, 4)) 432 printf("\t%s:%s %s: invalid: %s\n", 433 map->map_class->map_cname == NULL ? "NULL" : 434 map->map_class->map_cname, 435 map->map_mname == NULL ? "NULL" : 436 map->map_mname, 437 map->map_file == NULL ? "NULL" : 438 map->map_file, 439 errstring(errno)); 440 if (!bitset(MF_OPTIONAL, map->map_mflags)) 441 { 442 extern MAPCLASS BogusMapClass; 443 444 map->map_class = &BogusMapClass; 445 map->map_mflags |= MF_OPEN; 446 } 447 } 448 } 449 } 450 /* 451 ** NDBM modules 452 */ 453 454 #ifdef NDBM 455 456 /* 457 ** DBM_MAP_OPEN -- DBM-style map open 458 */ 459 460 bool 461 ndbm_map_open(map, mode) 462 MAP *map; 463 int mode; 464 { 465 register DBM *dbm; 466 struct stat st; 467 468 if (tTd(38, 2)) 469 printf("ndbm_map_open(%s, %s, %d)\n", 470 map->map_mname, map->map_file, mode); 471 472 if (mode == O_RDWR) 473 mode |= O_CREAT|O_TRUNC; 474 475 /* open the database */ 476 dbm = dbm_open(map->map_file, mode, DBMMODE); 477 if (dbm == NULL) 478 { 479 if (aliaswait(map, ".pag", FALSE)) 480 return TRUE; 481 if (!bitset(MF_OPTIONAL, map->map_mflags)) 482 syserr("Cannot open DBM database %s", map->map_file); 483 return FALSE; 484 } 485 map->map_db1 = (void *) dbm; 486 if (mode == O_RDONLY) 487 { 488 if (bitset(MF_ALIAS, map->map_mflags) && 489 !aliaswait(map, ".pag", TRUE)) 490 return FALSE; 491 } 492 else 493 { 494 int fd; 495 496 /* exclusive lock for duration of rebuild */ 497 fd = dbm_dirfno((DBM *) map->map_db1); 498 if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags) && 499 lockfile(fd, map->map_file, ".dir", LOCK_EX)) 500 map->map_mflags |= MF_LOCKED; 501 } 502 if (fstat(dbm_dirfno((DBM *) map->map_db1), &st) >= 0) 503 map->map_mtime = st.st_mtime; 504 return TRUE; 505 } 506 507 508 /* 509 ** DBM_MAP_LOOKUP -- look up a datum in a DBM-type map 510 */ 511 512 char * 513 ndbm_map_lookup(map, name, av, statp) 514 MAP *map; 515 char *name; 516 char **av; 517 int *statp; 518 { 519 datum key, val; 520 int fd; 521 char keybuf[MAXNAME + 1]; 522 523 if (tTd(38, 20)) 524 printf("ndbm_map_lookup(%s, %s)\n", 525 map->map_mname, name); 526 527 key.dptr = name; 528 key.dsize = strlen(name); 529 if (!bitset(MF_NOFOLDCASE, map->map_mflags)) 530 { 531 if (key.dsize > sizeof keybuf - 1) 532 key.dsize = sizeof keybuf - 1; 533 bcopy(key.dptr, keybuf, key.dsize + 1); 534 makelower(keybuf); 535 key.dptr = keybuf; 536 } 537 fd = dbm_dirfno((DBM *) map->map_db1); 538 if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags)) 539 (void) lockfile(fd, map->map_file, ".dir", LOCK_SH); 540 val.dptr = NULL; 541 if (bitset(MF_TRY0NULL, map->map_mflags)) 542 { 543 val = dbm_fetch((DBM *) map->map_db1, key); 544 if (val.dptr != NULL) 545 map->map_mflags &= ~MF_TRY1NULL; 546 } 547 if (val.dptr == NULL && bitset(MF_TRY1NULL, map->map_mflags)) 548 { 549 key.dsize++; 550 val = dbm_fetch((DBM *) map->map_db1, key); 551 if (val.dptr != NULL) 552 map->map_mflags &= ~MF_TRY0NULL; 553 } 554 if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags)) 555 (void) lockfile(fd, map->map_file, ".dir", LOCK_UN); 556 if (val.dptr == NULL) 557 return NULL; 558 if (bitset(MF_MATCHONLY, map->map_mflags)) 559 return map_rewrite(map, name, strlen(name), NULL); 560 else 561 return map_rewrite(map, val.dptr, val.dsize, av); 562 } 563 564 565 /* 566 ** DBM_MAP_STORE -- store a datum in the database 567 */ 568 569 void 570 ndbm_map_store(map, lhs, rhs) 571 register MAP *map; 572 char *lhs; 573 char *rhs; 574 { 575 datum key; 576 datum data; 577 int stat; 578 579 if (tTd(38, 12)) 580 printf("ndbm_map_store(%s, %s, %s)\n", 581 map->map_mname, lhs, rhs); 582 583 key.dsize = strlen(lhs); 584 key.dptr = lhs; 585 586 data.dsize = strlen(rhs); 587 data.dptr = rhs; 588 589 if (bitset(MF_INCLNULL, map->map_mflags)) 590 { 591 key.dsize++; 592 data.dsize++; 593 } 594 595 stat = dbm_store((DBM *) map->map_db1, key, data, DBM_INSERT); 596 if (stat > 0) 597 { 598 if (!bitset(MF_APPEND, map->map_mflags)) 599 usrerr("050 Warning: duplicate alias name %s", lhs); 600 else 601 { 602 static char *buf = NULL; 603 static int bufsiz = 0; 604 auto int xstat; 605 datum old; 606 607 old.dptr = ndbm_map_lookup(map, key.dptr, NULL, &xstat); 608 if (old.dptr != NULL && *old.dptr != '\0') 609 { 610 old.dsize = strlen(old.dptr); 611 if (data.dsize + old.dsize + 2 > bufsiz) 612 { 613 if (buf != NULL) 614 (void) free(buf); 615 bufsiz = data.dsize + old.dsize + 2; 616 buf = xalloc(bufsiz); 617 } 618 sprintf(buf, "%s,%s", data.dptr, old.dptr); 619 data.dsize = data.dsize + old.dsize + 1; 620 data.dptr = buf; 621 if (tTd(38, 9)) 622 printf("ndbm_map_store append=%s\n", data.dptr); 623 } 624 } 625 stat = dbm_store((DBM *) map->map_db1, key, data, DBM_REPLACE); 626 } 627 if (stat != 0) 628 syserr("readaliases: dbm put (%s)", lhs); 629 } 630 631 632 /* 633 ** NDBM_MAP_CLOSE -- close the database 634 */ 635 636 void 637 ndbm_map_close(map) 638 register MAP *map; 639 { 640 if (tTd(38, 9)) 641 printf("ndbm_map_close(%s, %s, %x)\n", 642 map->map_mname, map->map_file, map->map_mflags); 643 644 if (bitset(MF_WRITABLE, map->map_mflags)) 645 { 646 #ifdef NIS 647 bool inclnull; 648 char buf[200]; 649 650 inclnull = bitset(MF_INCLNULL, map->map_mflags); 651 map->map_mflags &= ~MF_INCLNULL; 652 653 (void) sprintf(buf, "%010ld", curtime()); 654 ndbm_map_store(map, "YP_LAST_MODIFIED", buf); 655 656 (void) gethostname(buf, sizeof buf); 657 ndbm_map_store(map, "YP_MASTER_NAME", buf); 658 659 if (inclnull) 660 map->map_mflags |= MF_INCLNULL; 661 #endif 662 663 /* write out the distinguished alias */ 664 ndbm_map_store(map, "@", "@"); 665 } 666 dbm_close((DBM *) map->map_db1); 667 } 668 669 #endif 670 /* 671 ** NEWDB (Hash and BTree) Modules 672 */ 673 674 #ifdef NEWDB 675 676 /* 677 ** BT_MAP_OPEN, HASH_MAP_OPEN -- database open primitives. 678 ** 679 ** These do rather bizarre locking. If you can lock on open, 680 ** do that to avoid the condition of opening a database that 681 ** is being rebuilt. If you don't, we'll try to fake it, but 682 ** there will be a race condition. If opening for read-only, 683 ** we immediately release the lock to avoid freezing things up. 684 ** We really ought to hold the lock, but guarantee that we won't 685 ** be pokey about it. That's hard to do. 686 */ 687 688 bool 689 bt_map_open(map, mode) 690 MAP *map; 691 int mode; 692 { 693 DB *db; 694 int i; 695 int omode; 696 int fd; 697 struct stat st; 698 char buf[MAXNAME + 1]; 699 700 if (tTd(38, 2)) 701 printf("bt_map_open(%s, %s, %d)\n", 702 map->map_mname, map->map_file, mode); 703 704 omode = mode; 705 if (omode == O_RDWR) 706 { 707 omode |= O_CREAT|O_TRUNC; 708 #if defined(O_EXLOCK) && HASFLOCK 709 omode |= O_EXLOCK; 710 # if !OLD_NEWDB 711 } 712 else 713 { 714 omode |= O_SHLOCK; 715 # endif 716 #endif 717 } 718 719 (void) strcpy(buf, map->map_file); 720 i = strlen(buf); 721 if (i < 3 || strcmp(&buf[i - 3], ".db") != 0) 722 (void) strcat(buf, ".db"); 723 db = dbopen(buf, omode, DBMMODE, DB_BTREE, NULL); 724 if (db == NULL) 725 { 726 #ifdef MAYBENEXTRELEASE 727 if (aliaswait(map, ".db", FALSE)) 728 return TRUE; 729 #endif 730 if (!bitset(MF_OPTIONAL, map->map_mflags)) 731 syserr("Cannot open BTREE database %s", map->map_file); 732 return FALSE; 733 } 734 #if !OLD_NEWDB 735 fd = db->fd(db); 736 # if defined(O_EXLOCK) && HASFLOCK 737 if (fd >= 0) 738 { 739 if (mode == O_RDONLY) 740 (void) lockfile(fd, map->map_file, ".db", LOCK_UN); 741 else 742 map->map_mflags |= MF_LOCKED; 743 } 744 # else 745 if (mode == O_RDWR && fd >= 0) 746 { 747 if (lockfile(fd, map->map_file, ".db", LOCK_EX)) 748 map->map_mflags |= MF_LOCKED; 749 } 750 # endif 751 #endif 752 753 /* try to make sure that at least the database header is on disk */ 754 if (mode == O_RDWR) 755 #if OLD_NEWDB 756 (void) db->sync(db); 757 #else 758 (void) db->sync(db, 0); 759 760 if (fd >= 0 && fstat(fd, &st) >= 0) 761 map->map_mtime = st.st_mtime; 762 #endif 763 764 map->map_db2 = (void *) db; 765 if (mode == O_RDONLY && bitset(MF_ALIAS, map->map_mflags)) 766 if (!aliaswait(map, ".db", TRUE)) 767 return FALSE; 768 return TRUE; 769 } 770 771 772 /* 773 ** HASH_MAP_INIT -- HASH-style map initialization 774 */ 775 776 bool 777 hash_map_open(map, mode) 778 MAP *map; 779 int mode; 780 { 781 DB *db; 782 int i; 783 int omode; 784 int fd; 785 struct stat st; 786 char buf[MAXNAME + 1]; 787 788 if (tTd(38, 2)) 789 printf("hash_map_open(%s, %s, %d)\n", 790 map->map_mname, map->map_file, mode); 791 792 omode = mode; 793 if (omode == O_RDWR) 794 { 795 omode |= O_CREAT|O_TRUNC; 796 #if defined(O_EXLOCK) && HASFLOCK 797 omode |= O_EXLOCK; 798 # if !OLD_NEWDB 799 } 800 else 801 { 802 omode |= O_SHLOCK; 803 # endif 804 #endif 805 } 806 807 (void) strcpy(buf, map->map_file); 808 i = strlen(buf); 809 if (i < 3 || strcmp(&buf[i - 3], ".db") != 0) 810 (void) strcat(buf, ".db"); 811 db = dbopen(buf, omode, DBMMODE, DB_HASH, NULL); 812 if (db == NULL) 813 { 814 #ifdef MAYBENEXTRELEASE 815 if (aliaswait(map, ".db", FALSE)) 816 return TRUE; 817 #endif 818 if (!bitset(MF_OPTIONAL, map->map_mflags)) 819 syserr("Cannot open HASH database %s", map->map_file); 820 return FALSE; 821 } 822 #if !OLD_NEWDB 823 fd = db->fd(db); 824 # if defined(O_EXLOCK) && HASFLOCK 825 if (fd >= 0) 826 { 827 if (mode == O_RDONLY) 828 (void) lockfile(fd, map->map_file, ".db", LOCK_UN); 829 else 830 map->map_mflags |= MF_LOCKED; 831 } 832 # else 833 if (mode == O_RDWR && fd >= 0) 834 { 835 if (lockfile(fd, map->map_file, ".db", LOCK_EX)) 836 map->map_mflags |= MF_LOCKED; 837 } 838 # endif 839 #endif 840 841 /* try to make sure that at least the database header is on disk */ 842 if (mode == O_RDWR) 843 #if OLD_NEWDB 844 (void) db->sync(db); 845 #else 846 (void) db->sync(db, 0); 847 848 if (fd >= 0 && fstat(fd, &st) >= 0) 849 map->map_mtime = st.st_mtime; 850 #endif 851 852 map->map_db2 = (void *) db; 853 if (mode == O_RDONLY && bitset(MF_ALIAS, map->map_mflags)) 854 if (!aliaswait(map, ".db", TRUE)) 855 return FALSE; 856 return TRUE; 857 } 858 859 860 /* 861 ** DB_MAP_LOOKUP -- look up a datum in a BTREE- or HASH-type map 862 */ 863 864 char * 865 db_map_lookup(map, name, av, statp) 866 MAP *map; 867 char *name; 868 char **av; 869 int *statp; 870 { 871 DBT key, val; 872 register DB *db = (DB *) map->map_db2; 873 int st; 874 int saveerrno; 875 int fd; 876 char keybuf[MAXNAME + 1]; 877 878 if (tTd(38, 20)) 879 printf("db_map_lookup(%s, %s)\n", 880 map->map_mname, name); 881 882 key.size = strlen(name); 883 if (key.size > sizeof keybuf - 1) 884 key.size = sizeof keybuf - 1; 885 key.data = keybuf; 886 bcopy(name, keybuf, key.size + 1); 887 if (!bitset(MF_NOFOLDCASE, map->map_mflags)) 888 makelower(keybuf); 889 #if !OLD_NEWDB 890 fd = db->fd(db); 891 if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags)) 892 (void) lockfile(db->fd(db), map->map_file, ".db", LOCK_SH); 893 #endif 894 st = 1; 895 if (bitset(MF_TRY0NULL, map->map_mflags)) 896 { 897 st = db->get(db, &key, &val, 0); 898 if (st == 0) 899 map->map_mflags &= ~MF_TRY1NULL; 900 } 901 if (st != 0 && bitset(MF_TRY1NULL, map->map_mflags)) 902 { 903 key.size++; 904 st = db->get(db, &key, &val, 0); 905 if (st == 0) 906 map->map_mflags &= ~MF_TRY0NULL; 907 } 908 saveerrno = errno; 909 #if !OLD_NEWDB 910 if (fd >= 0 && !bitset(MF_LOCKED, map->map_mflags)) 911 (void) lockfile(fd, map->map_file, ".db", LOCK_UN); 912 #endif 913 if (st != 0) 914 { 915 errno = saveerrno; 916 if (st < 0) 917 syserr("db_map_lookup: get (%s)", name); 918 return NULL; 919 } 920 if (bitset(MF_MATCHONLY, map->map_mflags)) 921 return map_rewrite(map, name, strlen(name), NULL); 922 else 923 return map_rewrite(map, val.data, val.size, av); 924 } 925 926 927 /* 928 ** DB_MAP_STORE -- store a datum in the NEWDB database 929 */ 930 931 void 932 db_map_store(map, lhs, rhs) 933 register MAP *map; 934 char *lhs; 935 char *rhs; 936 { 937 int stat; 938 DBT key; 939 DBT data; 940 register DB *db = map->map_db2; 941 942 if (tTd(38, 20)) 943 printf("db_map_store(%s, %s, %s)\n", 944 map->map_mname, lhs, rhs); 945 946 key.size = strlen(lhs); 947 key.data = lhs; 948 949 data.size = strlen(rhs); 950 data.data = rhs; 951 952 if (bitset(MF_INCLNULL, map->map_mflags)) 953 { 954 key.size++; 955 data.size++; 956 } 957 958 stat = db->put(db, &key, &data, R_NOOVERWRITE); 959 if (stat > 0) 960 { 961 if (!bitset(MF_APPEND, map->map_mflags)) 962 usrerr("050 Warning: duplicate alias name %s", lhs); 963 else 964 { 965 static char *buf = NULL; 966 static int bufsiz = 0; 967 DBT old; 968 969 old.data = db_map_lookup(map, key.data, NULL, &stat); 970 if (old.data != NULL) 971 { 972 old.size = strlen(old.data); 973 if (data.size + old.size + 2 > bufsiz) 974 { 975 if (buf != NULL) 976 (void) free(buf); 977 bufsiz = data.size + old.size + 2; 978 buf = xalloc(bufsiz); 979 } 980 sprintf(buf, "%s,%s", data.data, old.data); 981 data.size = data.size + old.size + 1; 982 data.data = buf; 983 if (tTd(38, 9)) 984 printf("db_map_store append=%s\n", data.data); 985 } 986 } 987 stat = db->put(db, &key, &data, 0); 988 } 989 if (stat != 0) 990 syserr("readaliases: db put (%s)", lhs); 991 } 992 993 994 /* 995 ** DB_MAP_CLOSE -- add distinguished entries and close the database 996 */ 997 998 void 999 db_map_close(map) 1000 MAP *map; 1001 { 1002 register DB *db = map->map_db2; 1003 1004 if (tTd(38, 9)) 1005 printf("db_map_close(%s, %s, %x)\n", 1006 map->map_mname, map->map_file, map->map_mflags); 1007 1008 if (bitset(MF_WRITABLE, map->map_mflags)) 1009 { 1010 /* write out the distinguished alias */ 1011 db_map_store(map, "@", "@"); 1012 } 1013 1014 if (db->close(db) != 0) 1015 syserr("readaliases: db close failure"); 1016 } 1017 1018 #endif 1019 /* 1020 ** NIS Modules 1021 */ 1022 1023 # ifdef NIS 1024 1025 # ifndef YPERR_BUSY 1026 # define YPERR_BUSY 16 1027 # endif 1028 1029 /* 1030 ** NIS_MAP_OPEN -- open DBM map 1031 */ 1032 1033 bool 1034 nis_map_open(map, mode) 1035 MAP *map; 1036 int mode; 1037 { 1038 int yperr; 1039 register char *p; 1040 auto char *vp; 1041 auto int vsize; 1042 char *master; 1043 1044 if (tTd(38, 2)) 1045 printf("nis_map_open(%s, %s)\n", 1046 map->map_mname, map->map_file); 1047 1048 if (mode != O_RDONLY) 1049 { 1050 /* issue a pseudo-error message */ 1051 #ifdef ENOSYS 1052 errno = ENOSYS; 1053 #else 1054 # ifdef EFTYPE 1055 errno = EFTYPE; 1056 # else 1057 errno = ENXIO; 1058 # endif 1059 #endif 1060 return FALSE; 1061 } 1062 1063 p = strchr(map->map_file, '@'); 1064 if (p != NULL) 1065 { 1066 *p++ = '\0'; 1067 if (*p != '\0') 1068 map->map_domain = p; 1069 } 1070 1071 if (*map->map_file == '\0') 1072 map->map_file = "mail.aliases"; 1073 1074 if (map->map_domain == NULL) 1075 { 1076 yperr = yp_get_default_domain(&map->map_domain); 1077 if (yperr != 0) 1078 { 1079 if (!bitset(MF_OPTIONAL, map->map_mflags)) 1080 syserr("421 NIS map %s specified, but NIS not running\n", 1081 map->map_file); 1082 return FALSE; 1083 } 1084 } 1085 1086 /* check to see if this map actually exists */ 1087 yperr = yp_match(map->map_domain, map->map_file, "@", 1, 1088 &vp, &vsize); 1089 if (tTd(38, 10)) 1090 printf("nis_map_open: yp_match(%s, %s) => %s\n", 1091 map->map_domain, map->map_file, yperr_string(yperr)); 1092 if (yperr == 0 || yperr == YPERR_KEY || yperr == YPERR_BUSY) 1093 { 1094 if (!bitset(MF_ALIAS, map->map_mflags) || 1095 aliaswait(map, NULL, TRUE)) 1096 return TRUE; 1097 } 1098 1099 if (!bitset(MF_OPTIONAL, map->map_mflags)) 1100 { 1101 syserr("421 Cannot bind to map %s in domain %s: %s", 1102 map->map_file, map->map_domain, yperr_string(yperr)); 1103 } 1104 1105 return FALSE; 1106 } 1107 1108 1109 /* 1110 ** NIS_MAP_LOOKUP -- look up a datum in a NIS map 1111 */ 1112 1113 char * 1114 nis_map_lookup(map, name, av, statp) 1115 MAP *map; 1116 char *name; 1117 char **av; 1118 int *statp; 1119 { 1120 char *vp; 1121 auto int vsize; 1122 int buflen; 1123 int yperr; 1124 char keybuf[MAXNAME + 1]; 1125 1126 if (tTd(38, 20)) 1127 printf("nis_map_lookup(%s, %s)\n", 1128 map->map_mname, name); 1129 1130 buflen = strlen(name); 1131 if (buflen > sizeof keybuf - 1) 1132 buflen = sizeof keybuf - 1; 1133 bcopy(name, keybuf, buflen + 1); 1134 if (!bitset(MF_NOFOLDCASE, map->map_mflags)) 1135 makelower(keybuf); 1136 yperr = YPERR_KEY; 1137 if (bitset(MF_TRY0NULL, map->map_mflags)) 1138 { 1139 yperr = yp_match(map->map_domain, map->map_file, keybuf, buflen, 1140 &vp, &vsize); 1141 if (yperr == 0) 1142 map->map_mflags &= ~MF_TRY1NULL; 1143 } 1144 if (yperr == YPERR_KEY && bitset(MF_TRY1NULL, map->map_mflags)) 1145 { 1146 buflen++; 1147 yperr = yp_match(map->map_domain, map->map_file, keybuf, buflen, 1148 &vp, &vsize); 1149 if (yperr == 0) 1150 map->map_mflags &= ~MF_TRY0NULL; 1151 } 1152 if (yperr != 0) 1153 { 1154 if (yperr != YPERR_KEY && yperr != YPERR_BUSY) 1155 map->map_mflags &= ~(MF_VALID|MF_OPEN); 1156 return NULL; 1157 } 1158 if (bitset(MF_MATCHONLY, map->map_mflags)) 1159 return map_rewrite(map, name, strlen(name), NULL); 1160 else 1161 return map_rewrite(map, vp, vsize, av); 1162 } 1163 1164 1165 /* 1166 ** NIS_GETCANONNAME -- look up canonical name in NIS 1167 */ 1168 1169 bool 1170 nis_getcanonname(name, hbsize, statp) 1171 char *name; 1172 int hbsize; 1173 int *statp; 1174 { 1175 char *vp; 1176 auto int vsize; 1177 int keylen; 1178 int yperr; 1179 static bool try0null = TRUE; 1180 static bool try1null = TRUE; 1181 static char *yp_domain = NULL; 1182 char *domain, *p; 1183 char host_record[MAXLINE]; 1184 char buf[MAXNAME]; 1185 char *cname; 1186 extern char *get_column(); 1187 1188 if (tTd(38, 20)) 1189 printf("nis_getcanonname(%s)\n", name); 1190 1191 shorten_hostname(name); 1192 1193 /* we only accept single token search key */ 1194 if (strchr(name, '.')) 1195 { 1196 *statp = EX_NOHOST; 1197 return FALSE; 1198 } 1199 1200 keylen = strlen(name); 1201 1202 if (yp_domain == NULL) 1203 yp_get_default_domain(&yp_domain); 1204 makelower(name); 1205 yperr = YPERR_KEY; 1206 if (try0null) 1207 { 1208 yperr = yp_match(yp_domain, "hosts.byname", name, keylen, 1209 &vp, &vsize); 1210 if (yperr == 0) 1211 try1null = FALSE; 1212 } 1213 if (yperr == YPERR_KEY && try1null) 1214 { 1215 keylen++; 1216 yperr = yp_match(yp_domain, "hosts.byname", name, keylen, 1217 &vp, &vsize); 1218 if (yperr == 0) 1219 try0null = FALSE; 1220 } 1221 if (yperr != 0) 1222 { 1223 if (yperr == YPERR_KEY) 1224 *statp = EX_NOHOST; 1225 else if (yperr == YPERR_BUSY) 1226 *statp = EX_TEMPFAIL; 1227 else 1228 *statp = EX_UNAVAILABLE; 1229 return FALSE; 1230 } 1231 strncpy(host_record, vp, vsize); 1232 host_record[vsize] = '\0'; 1233 cname = get_column(host_record, 1, '\t', buf); 1234 if (cname == NULL) 1235 { 1236 /* this should not happen, but.... */ 1237 *statp = EX_NOHOST; 1238 return FALSE; 1239 } 1240 1241 if (hbsize >= strlen(cname)) 1242 { 1243 strcpy(name, cname); 1244 *statp = EX_OK; 1245 return TRUE; 1246 } 1247 *statp = EX_UNAVAILABLE; 1248 return FALSE; 1249 } 1250 1251 #endif 1252 /* 1253 ** NISPLUS Modules 1254 ** 1255 ** This code donated by Sun Microsystems. 1256 */ 1257 1258 #ifdef NISPLUS 1259 1260 #undef NIS /* symbol conflict in nis.h */ 1261 #include <rpcsvc/nis.h> 1262 #include <rpcsvc/nislib.h> 1263 1264 #define EN_col(col) zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val 1265 #define COL_NAME(res,i) ((res->objects.objects_val)->TA_data.ta_cols.ta_cols_val)[i].tc_name 1266 #define COL_MAX(res) ((res->objects.objects_val)->TA_data.ta_cols.ta_cols_len) 1267 #define PARTIAL_NAME(x) ((x)[strlen(x) - 1] != '.') 1268 1269 /* 1270 ** NISPLUS_MAP_OPEN -- open nisplus table 1271 */ 1272 1273 bool 1274 nisplus_map_open(map, mode) 1275 MAP *map; 1276 int mode; 1277 { 1278 register char *p; 1279 char qbuf[MAXLINE + NIS_MAXNAMELEN]; 1280 nis_result *res = NULL; 1281 u_int objs_len; 1282 nis_object *obj_ptr; 1283 int retry_cnt, max_col, i; 1284 1285 if (tTd(38, 2)) 1286 printf("nisplus_map_open(%s, %s, %d)\n", 1287 map->map_mname, map->map_file, mode); 1288 1289 if (mode != O_RDONLY) 1290 { 1291 errno = ENODEV; 1292 return FALSE; 1293 } 1294 1295 if (*map->map_file == '\0') 1296 map->map_file = "mail_aliases.org_dir"; 1297 1298 if (PARTIAL_NAME(map->map_file) && map->map_domain == NULL) 1299 { 1300 /* set default NISPLUS Domain to $m */ 1301 extern char *nisplus_default_domain(); 1302 1303 map->map_domain = newstr(nisplus_default_domain()); 1304 if (tTd(38, 2)) 1305 printf("nisplus_map_open(%s): using domain %s\n", 1306 map->map_file, map->map_domain); 1307 } 1308 if (!PARTIAL_NAME(map->map_file)) 1309 map->map_domain = newstr(""); 1310 1311 /* check to see if this map actually exists */ 1312 if (PARTIAL_NAME(map->map_file)) 1313 sprintf(qbuf, "%s.%s", map->map_file, map->map_domain); 1314 else 1315 strcpy(qbuf, map->map_file); 1316 1317 retry_cnt = 0; 1318 while (res == NULL || res->status != NIS_SUCCESS) 1319 { 1320 res = nis_lookup(qbuf, FOLLOW_LINKS); 1321 switch (res->status) 1322 { 1323 case NIS_SUCCESS: 1324 case NIS_TRYAGAIN: 1325 case NIS_RPCERROR: 1326 case NIS_NAMEUNREACHABLE: 1327 break; 1328 1329 default: /* all other nisplus errors */ 1330 #if 0 1331 if (!bitset(MF_OPTIONAL, map->map_mflags)) 1332 syserr("421 Cannot find table %s.%s: %s", 1333 map->map_file, map->map_domain, 1334 nis_sperrno(res->status)); 1335 #endif 1336 errno = EBADR; 1337 return FALSE; 1338 } 1339 sleep(2); /* try not to overwhelm hosed server */ 1340 if (retry_cnt++ > 4) 1341 { 1342 errno = EBADR; 1343 return FALSE; 1344 } 1345 } 1346 1347 if (NIS_RES_NUMOBJ(res) != 1 || 1348 (NIS_RES_OBJECT(res)->zo_data.zo_type != TABLE_OBJ)) 1349 { 1350 if (tTd(38, 10)) 1351 printf("nisplus_map_open: %s is not a table\n", qbuf); 1352 #if 0 1353 if (!bitset(MF_OPTIONAL, map->map_mflags)) 1354 syserr("421 %s.%s: %s is not a table", 1355 map->map_file, map->map_domain, 1356 nis_sperrno(res->status)); 1357 #endif 1358 errno = EBADR; 1359 return FALSE; 1360 } 1361 /* default key column is column 0 */ 1362 if (map->map_keycolnm == NULL) 1363 map->map_keycolnm = newstr(COL_NAME(res,0)); 1364 1365 max_col = COL_MAX(res); 1366 1367 /* verify the key column exist */ 1368 for (i=0; i< max_col; i++) 1369 { 1370 if (!strcmp(map->map_keycolnm, COL_NAME(res,i))) 1371 break; 1372 } 1373 if (i == max_col) 1374 { 1375 if (tTd(38, 2)) 1376 printf("nisplus_map_open(%s): can not find key column %s\n", 1377 map->map_file, map->map_keycolnm); 1378 errno = EBADR; 1379 return FALSE; 1380 } 1381 1382 /* default value column is the last column */ 1383 if (map->map_valcolnm == NULL) 1384 { 1385 map->map_valcolno = max_col - 1; 1386 return TRUE; 1387 } 1388 1389 for (i=0; i< max_col; i++) 1390 { 1391 if (strcmp(map->map_valcolnm, COL_NAME(res,i)) == 0) 1392 { 1393 map->map_valcolno = i; 1394 return TRUE; 1395 } 1396 } 1397 1398 if (tTd(38, 2)) 1399 printf("nisplus_map_open(%s): can not find column %s\n", 1400 map->map_file, map->map_keycolnm); 1401 errno = EBADR; 1402 return FALSE; 1403 } 1404 1405 1406 /* 1407 ** NISPLUS_MAP_LOOKUP -- look up a datum in a NISPLUS table 1408 */ 1409 1410 char * 1411 nisplus_map_lookup(map, name, av, statp) 1412 MAP *map; 1413 char *name; 1414 char **av; 1415 int *statp; 1416 { 1417 char *vp; 1418 auto int vsize; 1419 int buflen; 1420 char search_key[MAXNAME + 1]; 1421 char qbuf[MAXLINE + NIS_MAXNAMELEN]; 1422 nis_result *result; 1423 1424 if (tTd(38, 20)) 1425 printf("nisplus_map_lookup(%s, %s)\n", 1426 map->map_mname, name); 1427 1428 if (!bitset(MF_OPEN, map->map_mflags)) 1429 { 1430 if (nisplus_map_open(map, O_RDONLY)) 1431 map->map_mflags |= MF_OPEN; 1432 else 1433 { 1434 *statp = EX_UNAVAILABLE; 1435 return NULL; 1436 } 1437 } 1438 1439 buflen = strlen(name); 1440 if (buflen > sizeof search_key - 1) 1441 buflen = sizeof search_key - 1; 1442 bcopy(name, search_key, buflen + 1); 1443 if (!bitset(MF_NOFOLDCASE, map->map_mflags)) 1444 makelower(search_key); 1445 1446 /* construct the query */ 1447 if (PARTIAL_NAME(map->map_file)) 1448 sprintf(qbuf, "[%s=%s],%s.%s", map->map_keycolnm, 1449 search_key, map->map_file, map->map_domain); 1450 else 1451 sprintf(qbuf, "[%s=%s],%s", map->map_keycolnm, 1452 search_key, map->map_file); 1453 1454 if (tTd(38, 20)) 1455 printf("qbuf=%s\n", qbuf); 1456 result = nis_list(qbuf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); 1457 if (result->status == NIS_SUCCESS) 1458 { 1459 int count; 1460 char *str; 1461 1462 if ((count = NIS_RES_NUMOBJ(result)) != 1) 1463 { 1464 if (LogLevel > 10) 1465 syslog(LOG_WARNING, 1466 "%s:Lookup error, expected 1 entry, got (%d)", 1467 map->map_file, count); 1468 1469 /* ignore second entry */ 1470 if (tTd(38, 20)) 1471 printf("nisplus_map_lookup(%s), got %d entries, additional entries ignored\n", 1472 name, count); 1473 } 1474 1475 vp = ((NIS_RES_OBJECT(result))->EN_col(map->map_valcolno)); 1476 /* set the length of the result */ 1477 if (vp == NULL) 1478 vp = ""; 1479 vsize = strlen(vp); 1480 if (tTd(38, 20)) 1481 printf("nisplus_map_lookup(%s), found %s\n", 1482 name, vp); 1483 if (bitset(MF_MATCHONLY, map->map_mflags)) 1484 str = map_rewrite(map, name, strlen(name), NULL); 1485 else 1486 str = map_rewrite(map, vp, vsize, av); 1487 nis_freeresult(result); 1488 #ifdef MAP_EXIT_STAT 1489 *statp = EX_OK; 1490 #endif 1491 return str; 1492 } 1493 else 1494 { 1495 #ifdef MAP_EXIT_STAT 1496 if (result->status == NIS_NOTFOUND) 1497 *statp = EX_NOTFOUND; 1498 else if (result->status == NIS_TRYAGAIN) 1499 *statp = EX_TEMPFAIL; 1500 else 1501 { 1502 *statp = EX_UNAVAILABLE; 1503 map->map_mflags &= ~(MF_VALID|MF_OPEN); 1504 } 1505 #else 1506 if ((result->status != NIS_NOTFOUND) && 1507 (result->status != NIS_TRYAGAIN)) 1508 map->map_mflags &= ~(MF_VALID|MF_OPEN); 1509 #endif 1510 } 1511 if (tTd(38, 20)) 1512 printf("nisplus_map_lookup(%s), failed\n", name); 1513 nis_freeresult(result); 1514 return NULL; 1515 } 1516 1517 1518 1519 /* 1520 ** NISPLUS_GETCANONNAME -- look up canonical name in NIS+ 1521 */ 1522 1523 bool 1524 nisplus_getcanonname(name, hbsize, statp) 1525 char *name; 1526 int hbsize; 1527 int *statp; 1528 { 1529 char *vp; 1530 auto int vsize; 1531 int buflen; 1532 char buf[MAXLINE + NIS_MAXNAMELEN]; 1533 nis_result *result; 1534 char *p; 1535 int len; 1536 1537 shorten_hostname(name); 1538 1539 p = strchr(name, '.'); 1540 if (p == NULL) 1541 { 1542 /* single token */ 1543 sprintf(buf, "[name=%s],hosts.org_dir", name); 1544 } 1545 else if (p[1] != '\0') 1546 { 1547 /* multi token -- take only first token in name buf */ 1548 *p = '\0'; 1549 sprintf(buf, "[name=%s],hosts.org_dir.%s", name, &p[1]); 1550 } 1551 else 1552 { 1553 *statp = EX_NOHOST; 1554 return FALSE; 1555 } 1556 1557 if (tTd(38, 20)) 1558 printf("\nnisplus_getcanoname(%s), qbuf=%s\n", 1559 name, buf); 1560 1561 result = nis_list(buf, EXPAND_NAME|FOLLOW_LINKS|FOLLOW_PATH, 1562 NULL, NULL); 1563 1564 if (result->status == NIS_SUCCESS) 1565 { 1566 int count; 1567 char *str; 1568 char *domain; 1569 1570 if ((count = NIS_RES_NUMOBJ(result)) != 1) 1571 { 1572 #ifdef LOG 1573 if (LogLevel > 10) 1574 syslog(LOG_WARNING, 1575 "nisplus_getcanonname: Lookup error, expected 1 entry, got (%d)", 1576 count); 1577 #endif 1578 1579 /* ignore second entry */ 1580 if (tTd(38, 20)) 1581 printf("nisplus_getcanoname(%s), got %d entries, addtional entries ignores\n", name); 1582 } 1583 1584 if (tTd(38, 20)) 1585 printf("nisplus_getcanoname(%s), found in directory \"%s\"\n", 1586 name, (NIS_RES_OBJECT(result))->zo_domain); 1587 1588 1589 vp = ((NIS_RES_OBJECT(result))->EN_col(0)); 1590 vsize = strlen(vp); 1591 if (tTd(38, 20)) 1592 printf("nisplus_getcanonname(%s), found %s\n", 1593 name, vp); 1594 domain = macvalue('m', CurEnv); 1595 if (hbsize > (vsize + ((int) strlen(domain)))) 1596 { 1597 sprintf(name, "%s.%s", vp, domain); 1598 *statp = EX_OK; 1599 } 1600 else 1601 *statp = EX_NOHOST; 1602 nis_freeresult(result); 1603 return TRUE; 1604 } 1605 else 1606 { 1607 if (result->status == NIS_NOTFOUND) 1608 *statp = EX_NOHOST; 1609 else if (result->status == NIS_TRYAGAIN) 1610 *statp = EX_TEMPFAIL; 1611 else 1612 { 1613 *statp = EX_UNAVAILABLE; 1614 } 1615 } 1616 if (tTd(38, 20)) 1617 printf("nisplus_getcanonname(%s), failed, status=%d, nsw_stat=%d\n", 1618 name, result->status, *statp); 1619 nis_freeresult(result); 1620 return FALSE; 1621 } 1622 1623 1624 char * 1625 nisplus_default_domain() 1626 { 1627 static char default_domain[MAXNAME + 1] = ""; 1628 char *p; 1629 1630 if (default_domain[0] != '\0') 1631 return(default_domain); 1632 1633 p = nis_local_directory(); 1634 strcpy(default_domain, p); 1635 return default_domain; 1636 } 1637 1638 #endif /* NISPLUS */ 1639 /* 1640 ** HESIOD Modules 1641 */ 1642 1643 #ifdef HESIOD 1644 1645 #include <hesiod.h> 1646 1647 char * 1648 hes_map_lookup(map, name, av, statp) 1649 MAP *map; 1650 char *name; 1651 char **av; 1652 int *statp; 1653 { 1654 char **hp; 1655 int i; 1656 1657 if (tTd(38, 20)) 1658 printf("hes_map_lookup(%s, %s)\n", map->map_file, name); 1659 1660 hp = hes_resolve(name, map->map_file); 1661 if (hp == NULL || hp[0] == NULL) 1662 return NULL; 1663 1664 if (bitset(MF_MATCHONLY, map->map_mflags)) 1665 return map_rewrite(map, name, strlen(name), NULL); 1666 else 1667 return map_rewrite(map, hp[0], strlen(hp[0]), av); 1668 } 1669 1670 #endif 1671 /* 1672 ** NeXT NETINFO Modules 1673 */ 1674 1675 #ifdef NETINFO 1676 1677 #define NETINFO_DEFAULT_DIR "/aliases" 1678 #define NETINFO_DEFAULT_PROPERTY "members" 1679 1680 1681 /* 1682 ** NI_MAP_OPEN -- open NetInfo Aliases 1683 */ 1684 1685 bool 1686 ni_map_open(map, mode) 1687 MAP *map; 1688 int mode; 1689 { 1690 char *p; 1691 1692 if (tTd(38, 20)) 1693 printf("ni_map_open: %s\n", map->map_file); 1694 1695 if (*map->map_file == '\0') 1696 map->map_file = NETINFO_DEFAULT_DIR; 1697 1698 if (map->map_valcolnm == NULL) 1699 map->map_valcolnm = NETINFO_DEFAULT_PROPERTY; 1700 1701 if (map->map_coldelim == '\0' && bitset(MF_ALIAS, map->map_mflags)) 1702 map->map_coldelim = ','; 1703 1704 return TRUE; 1705 } 1706 1707 1708 /* 1709 ** NI_MAP_LOOKUP -- look up a datum in NetInfo 1710 */ 1711 1712 char * 1713 ni_map_lookup(map, name, av, statp) 1714 MAP *map; 1715 char *name; 1716 char **av; 1717 int *statp; 1718 { 1719 char *res; 1720 char *propval; 1721 extern char *ni_propval(); 1722 1723 if (tTd(38, 20)) 1724 printf("ni_map_lookup(%s, %s)\n", 1725 map->map_mname, name); 1726 1727 propval = ni_propval(map->map_file, map->map_keycolnm, name, 1728 map->map_valcolnm, map->map_coldelim); 1729 1730 if (propval == NULL) 1731 return NULL; 1732 1733 if (bitset(MF_MATCHONLY, map->map_mflags)) 1734 res = map_rewrite(map, name, strlen(name), NULL); 1735 else 1736 res = map_rewrite(map, propval, strlen(propval), av); 1737 free(propval); 1738 return res; 1739 } 1740 1741 #endif 1742 /* 1743 ** TEXT (unindexed text file) Modules 1744 ** 1745 ** This code donated by Sun Microsystems. 1746 */ 1747 1748 1749 /* 1750 ** TEXT_MAP_OPEN -- open text table 1751 */ 1752 1753 bool 1754 text_map_open(map, mode) 1755 MAP *map; 1756 int mode; 1757 { 1758 struct stat sbuf; 1759 1760 if (tTd(38, 2)) 1761 printf("text_map_open(%s, %s, %d)\n", 1762 map->map_mname, map->map_file, mode); 1763 1764 if (mode != O_RDONLY) 1765 { 1766 errno = ENODEV; 1767 return FALSE; 1768 } 1769 1770 if (*map->map_file == '\0') 1771 { 1772 if (tTd(38, 2)) 1773 printf("text_map_open: file name required\n"); 1774 return FALSE; 1775 } 1776 1777 if (map->map_file[0] != '/') 1778 { 1779 if (tTd(38, 2)) 1780 printf("text_map_open(%s): file name must be fully qualified\n", 1781 map->map_file); 1782 return FALSE; 1783 } 1784 /* check to see if this map actually accessable */ 1785 if (access(map->map_file, R_OK) <0) 1786 return FALSE; 1787 1788 /* check to see if this map actually exist */ 1789 if (stat(map->map_file, &sbuf) <0) 1790 { 1791 if (tTd(38, 2)) 1792 printf("text_map_open(%s): can not stat %s\n", 1793 map->map_file, map->map_file); 1794 return FALSE; 1795 } 1796 1797 if (!S_ISREG(sbuf.st_mode)) 1798 { 1799 if (tTd(38, 2)) 1800 printf("text_map_open(%s): %s is not a file\n", 1801 map->map_file, map->map_file); 1802 return FALSE; 1803 } 1804 1805 if (map->map_keycolnm == NULL) 1806 map->map_keycolno = 0; 1807 else 1808 { 1809 if (!isdigit(*map->map_keycolnm)) 1810 { 1811 if (tTd(38, 2)) 1812 printf("text_map_open(%s): -k should specify a number, not %s\n", 1813 map->map_file, map->map_keycolnm); 1814 return FALSE; 1815 } 1816 map->map_keycolno = atoi(map->map_keycolnm); 1817 } 1818 1819 if (map->map_valcolnm == NULL) 1820 map->map_valcolno = 0; 1821 else 1822 { 1823 if (!isdigit(*map->map_valcolnm)) 1824 { 1825 if (tTd(38, 2)) 1826 printf("text_map_open(%s): -v should specify a number, not %s\n", 1827 map->map_file, map->map_valcolnm); 1828 return FALSE; 1829 } 1830 map->map_valcolno = atoi(map->map_valcolnm); 1831 } 1832 1833 if (tTd(38, 2)) 1834 { 1835 printf("text_map_open(%s): delimiter = ", 1836 map->map_file); 1837 if (map->map_coldelim == '\0') 1838 printf("(white space)\n"); 1839 else 1840 printf("%c\n", map->map_coldelim); 1841 } 1842 1843 return TRUE; 1844 } 1845 1846 1847 /* 1848 ** TEXT_MAP_LOOKUP -- look up a datum in a TEXT table 1849 */ 1850 1851 char * 1852 text_map_lookup(map, name, av, statp) 1853 MAP *map; 1854 char *name; 1855 char **av; 1856 int *statp; 1857 { 1858 char *vp; 1859 auto int vsize; 1860 int buflen; 1861 char search_key[MAXNAME + 1]; 1862 char linebuf[MAXLINE]; 1863 FILE *f; 1864 char buf[MAXNAME + 1]; 1865 char delim; 1866 int key_idx; 1867 bool found_it; 1868 extern char *get_column(); 1869 1870 1871 found_it = FALSE; 1872 if (tTd(38, 20)) 1873 printf("text_map_lookup(%s)\n", name); 1874 1875 buflen = strlen(name); 1876 if (buflen > sizeof search_key - 1) 1877 buflen = sizeof search_key - 1; 1878 bcopy(name, search_key, buflen + 1); 1879 if (!bitset(MF_NOFOLDCASE, map->map_mflags)) 1880 makelower(search_key); 1881 1882 f = fopen(map->map_file, "r"); 1883 if (f == NULL) 1884 { 1885 map->map_mflags &= ~(MF_VALID|MF_OPEN); 1886 *statp = EX_UNAVAILABLE; 1887 return NULL; 1888 } 1889 key_idx = map->map_keycolno; 1890 delim = map->map_coldelim; 1891 while (fgets(linebuf, MAXLINE, f)) 1892 { 1893 char *lf; 1894 if (linebuf[0] == '#') 1895 continue; /* skip comment line */ 1896 if (lf = strchr(linebuf, '\n')) 1897 *lf = '\0'; 1898 if (!strcasecmp(search_key, 1899 get_column(linebuf, key_idx, delim, buf))) 1900 { 1901 found_it = TRUE; 1902 break; 1903 } 1904 } 1905 fclose(f); 1906 if (!found_it) 1907 { 1908 #ifdef MAP_EXIT_STAT 1909 *statp = EX_NOTFOUND; 1910 #endif 1911 return(NULL); 1912 } 1913 vp = get_column(linebuf, map->map_valcolno, delim, buf); 1914 vsize = strlen(vp); 1915 #ifdef MAP_EXIT_STAT 1916 *statp = EX_OK; 1917 #endif 1918 if (bitset(MF_MATCHONLY, map->map_mflags)) 1919 return map_rewrite(map, name, strlen(name), NULL); 1920 else 1921 return map_rewrite(map, vp, vsize, av); 1922 } 1923 1924 1925 /* 1926 ** TEXT_GETCANONNAME -- look up canonical name in hosts file 1927 */ 1928 1929 bool 1930 text_getcanonname(name, hbsize, statp) 1931 char *name; 1932 int hbsize; 1933 int *statp; 1934 { 1935 int buflen; 1936 char delim; 1937 int key_idx; 1938 char *cname; 1939 bool found; 1940 char *domain; 1941 FILE *f; 1942 char linebuf[MAXLINE]; 1943 char cbuf[MAXNAME + 1]; 1944 char buf[MAXNAME + 1]; 1945 extern char *get_column(); 1946 1947 shorten_hostname(name); 1948 1949 /* we only accept single token search key */ 1950 if (strchr(name, '.') != NULL) 1951 { 1952 *statp = EX_NOHOST; 1953 return FALSE; 1954 } 1955 1956 found = FALSE; 1957 1958 f = fopen(HostsFile, "r"); 1959 if (f == NULL) 1960 { 1961 #ifdef MAP_EXIT_STAT 1962 *statp = EX_UNAVAILABLE; 1963 #endif 1964 return FALSE; 1965 } 1966 delim = '\t'; 1967 while (!found && fgets(linebuf, MAXLINE, f) != NULL) 1968 { 1969 char *p; 1970 1971 if (linebuf[0] == '#') 1972 continue; 1973 if ((p = strchr(linebuf, '\n')) != NULL) 1974 *p = '\0'; 1975 cname = get_column(linebuf, 1, delim, cbuf); 1976 if (cname != NULL && strcasecmp(name, cname) == 0) 1977 { 1978 found = TRUE; 1979 break; 1980 } 1981 1982 key_idx = 2; 1983 while ((p = get_column(linebuf, key_idx, delim, buf)) != NULL) 1984 { 1985 if (strcasecmp(name, p) == 0) 1986 { 1987 found = TRUE; 1988 break; 1989 } 1990 key_idx++; 1991 } 1992 } 1993 fclose(f); 1994 if (!found) 1995 { 1996 *statp = EX_NOHOST; 1997 return FALSE; 1998 } 1999 2000 if (hbsize >= strlen(cname)) 2001 { 2002 strcpy(name, cname); 2003 *statp = EX_OK; 2004 return TRUE; 2005 } 2006 *statp = EX_UNAVAILABLE; 2007 return FALSE; 2008 } 2009 /* 2010 ** STAB (Symbol Table) Modules 2011 */ 2012 2013 2014 /* 2015 ** STAB_MAP_LOOKUP -- look up alias in symbol table 2016 */ 2017 2018 char * 2019 stab_map_lookup(map, name, av, pstat) 2020 register MAP *map; 2021 char *name; 2022 char **av; 2023 int *pstat; 2024 { 2025 register STAB *s; 2026 2027 if (tTd(38, 20)) 2028 printf("stab_lookup(%s, %s)\n", 2029 map->map_mname, name); 2030 2031 s = stab(name, ST_ALIAS, ST_FIND); 2032 if (s != NULL) 2033 return (s->s_alias); 2034 return (NULL); 2035 } 2036 2037 2038 /* 2039 ** STAB_MAP_STORE -- store in symtab (actually using during init, not rebuild) 2040 */ 2041 2042 void 2043 stab_map_store(map, lhs, rhs) 2044 register MAP *map; 2045 char *lhs; 2046 char *rhs; 2047 { 2048 register STAB *s; 2049 2050 s = stab(lhs, ST_ALIAS, ST_ENTER); 2051 s->s_alias = newstr(rhs); 2052 } 2053 2054 2055 /* 2056 ** STAB_MAP_OPEN -- initialize (reads data file) 2057 ** 2058 ** This is a wierd case -- it is only intended as a fallback for 2059 ** aliases. For this reason, opens for write (only during a 2060 ** "newaliases") always fails, and opens for read open the 2061 ** actual underlying text file instead of the database. 2062 */ 2063 2064 bool 2065 stab_map_open(map, mode) 2066 register MAP *map; 2067 int mode; 2068 { 2069 FILE *af; 2070 struct stat st; 2071 2072 if (tTd(38, 2)) 2073 printf("stab_map_open(%s, %s)\n", 2074 map->map_mname, map->map_file); 2075 2076 if (mode != O_RDONLY) 2077 { 2078 errno = ENODEV; 2079 return FALSE; 2080 } 2081 2082 af = fopen(map->map_file, "r"); 2083 if (af == NULL) 2084 return FALSE; 2085 readaliases(map, af, FALSE, FALSE); 2086 2087 if (fstat(fileno(af), &st) >= 0) 2088 map->map_mtime = st.st_mtime; 2089 fclose(af); 2090 2091 return TRUE; 2092 } 2093 /* 2094 ** Implicit Modules 2095 ** 2096 ** Tries several types. For back compatibility of aliases. 2097 */ 2098 2099 2100 /* 2101 ** IMPL_MAP_LOOKUP -- lookup in best open database 2102 */ 2103 2104 char * 2105 impl_map_lookup(map, name, av, pstat) 2106 MAP *map; 2107 char *name; 2108 char **av; 2109 int *pstat; 2110 { 2111 if (tTd(38, 20)) 2112 printf("impl_map_lookup(%s, %s)\n", 2113 map->map_mname, name); 2114 2115 #ifdef NEWDB 2116 if (bitset(MF_IMPL_HASH, map->map_mflags)) 2117 return db_map_lookup(map, name, av, pstat); 2118 #endif 2119 #ifdef NDBM 2120 if (bitset(MF_IMPL_NDBM, map->map_mflags)) 2121 return ndbm_map_lookup(map, name, av, pstat); 2122 #endif 2123 return stab_map_lookup(map, name, av, pstat); 2124 } 2125 2126 /* 2127 ** IMPL_MAP_STORE -- store in open databases 2128 */ 2129 2130 void 2131 impl_map_store(map, lhs, rhs) 2132 MAP *map; 2133 char *lhs; 2134 char *rhs; 2135 { 2136 #ifdef NEWDB 2137 if (bitset(MF_IMPL_HASH, map->map_mflags)) 2138 db_map_store(map, lhs, rhs); 2139 #endif 2140 #ifdef NDBM 2141 if (bitset(MF_IMPL_NDBM, map->map_mflags)) 2142 ndbm_map_store(map, lhs, rhs); 2143 #endif 2144 stab_map_store(map, lhs, rhs); 2145 } 2146 2147 /* 2148 ** IMPL_MAP_OPEN -- implicit database open 2149 */ 2150 2151 bool 2152 impl_map_open(map, mode) 2153 MAP *map; 2154 int mode; 2155 { 2156 struct stat stb; 2157 2158 if (tTd(38, 2)) 2159 printf("impl_map_open(%s, %s, %d)\n", 2160 map->map_mname, map->map_file, mode); 2161 2162 if (stat(map->map_file, &stb) < 0) 2163 { 2164 /* no alias file at all */ 2165 if (tTd(38, 3)) 2166 printf("no map file\n"); 2167 return FALSE; 2168 } 2169 2170 #ifdef NEWDB 2171 map->map_mflags |= MF_IMPL_HASH; 2172 if (hash_map_open(map, mode)) 2173 { 2174 #if defined(NDBM) && defined(NIS) 2175 if (mode == O_RDONLY || access("/var/yp/Makefile", R_OK) != 0) 2176 #endif 2177 return TRUE; 2178 } 2179 else 2180 map->map_mflags &= ~MF_IMPL_HASH; 2181 #endif 2182 #ifdef NDBM 2183 map->map_mflags |= MF_IMPL_NDBM; 2184 if (ndbm_map_open(map, mode)) 2185 { 2186 return TRUE; 2187 } 2188 else 2189 map->map_mflags &= ~MF_IMPL_NDBM; 2190 #endif 2191 2192 #if defined(NEWDB) || defined(NDBM) 2193 if (Verbose) 2194 message("WARNING: cannot open alias database %s", map->map_file); 2195 #else 2196 if (mode != O_RDONLY) 2197 usrerr("Cannot rebuild aliases: no database format defined"); 2198 #endif 2199 2200 return stab_map_open(map, mode); 2201 } 2202 2203 2204 /* 2205 ** IMPL_MAP_CLOSE -- close any open database(s) 2206 */ 2207 2208 void 2209 impl_map_close(map) 2210 MAP *map; 2211 { 2212 if (tTd(38, 20)) 2213 printf("impl_map_close(%s, %s, %x)\n", 2214 map->map_mname, map->map_file, map->map_mflags); 2215 #ifdef NEWDB 2216 if (bitset(MF_IMPL_HASH, map->map_mflags)) 2217 { 2218 db_map_close(map); 2219 map->map_mflags &= ~MF_IMPL_HASH; 2220 } 2221 #endif 2222 2223 #ifdef NDBM 2224 if (bitset(MF_IMPL_NDBM, map->map_mflags)) 2225 { 2226 ndbm_map_close(map); 2227 map->map_mflags &= ~MF_IMPL_NDBM; 2228 } 2229 #endif 2230 } 2231 /* 2232 ** User map class. 2233 ** 2234 ** Provides access to the system password file. 2235 */ 2236 2237 /* 2238 ** USER_MAP_OPEN -- open user map 2239 ** 2240 ** Really just binds field names to field numbers. 2241 */ 2242 2243 bool 2244 user_map_open(map, mode) 2245 MAP *map; 2246 int mode; 2247 { 2248 if (tTd(38, 2)) 2249 printf("user_map_open(%s)\n", map->map_mname); 2250 2251 if (mode != O_RDONLY) 2252 { 2253 /* issue a pseudo-error message */ 2254 #ifdef ENOSYS 2255 errno = ENOSYS; 2256 #else 2257 # ifdef EFTYPE 2258 errno = EFTYPE; 2259 # else 2260 errno = ENXIO; 2261 # endif 2262 #endif 2263 return FALSE; 2264 } 2265 if (map->map_valcolnm == NULL) 2266 /* nothing */ ; 2267 else if (strcasecmp(map->map_valcolnm, "name") == 0) 2268 map->map_valcolno = 1; 2269 else if (strcasecmp(map->map_valcolnm, "passwd") == 0) 2270 map->map_valcolno = 2; 2271 else if (strcasecmp(map->map_valcolnm, "uid") == 0) 2272 map->map_valcolno = 3; 2273 else if (strcasecmp(map->map_valcolnm, "gid") == 0) 2274 map->map_valcolno = 4; 2275 else if (strcasecmp(map->map_valcolnm, "gecos") == 0) 2276 map->map_valcolno = 5; 2277 else if (strcasecmp(map->map_valcolnm, "dir") == 0) 2278 map->map_valcolno = 6; 2279 else if (strcasecmp(map->map_valcolnm, "shell") == 0) 2280 map->map_valcolno = 7; 2281 else 2282 { 2283 syserr("User map %s: unknown column name %s", 2284 map->map_mname, map->map_valcolnm); 2285 return FALSE; 2286 } 2287 return TRUE; 2288 } 2289 2290 2291 /* 2292 ** USER_MAP_LOOKUP -- look up a user in the passwd file. 2293 */ 2294 2295 char * 2296 user_map_lookup(map, key, av, statp) 2297 MAP *map; 2298 char *key; 2299 char **av; 2300 int *statp; 2301 { 2302 struct passwd *pw; 2303 2304 if (tTd(38, 20)) 2305 printf("user_map_lookup(%s, %s)\n", 2306 map->map_mname, key); 2307 2308 pw = sm_getpwnam(key); 2309 if (pw == NULL) 2310 return NULL; 2311 if (bitset(MF_MATCHONLY, map->map_mflags)) 2312 return map_rewrite(map, key, strlen(key), NULL); 2313 else 2314 { 2315 char *rwval = NULL; 2316 char buf[30]; 2317 2318 switch (map->map_valcolno) 2319 { 2320 case 0: 2321 case 1: 2322 rwval = pw->pw_name; 2323 break; 2324 2325 case 2: 2326 rwval = pw->pw_passwd; 2327 break; 2328 2329 case 3: 2330 sprintf(buf, "%d", pw->pw_uid); 2331 rwval = buf; 2332 break; 2333 2334 case 4: 2335 sprintf(buf, "%d", pw->pw_gid); 2336 rwval = buf; 2337 break; 2338 2339 case 5: 2340 rwval = pw->pw_gecos; 2341 break; 2342 2343 case 6: 2344 rwval = pw->pw_dir; 2345 break; 2346 2347 case 7: 2348 rwval = pw->pw_shell; 2349 break; 2350 } 2351 return map_rewrite(map, rwval, strlen(rwval), av); 2352 } 2353 } 2354 /* 2355 ** BESTMX -- find the best MX for a name 2356 ** 2357 ** This is really a hack, but I don't see any obvious way 2358 ** to generalize it at the moment. 2359 */ 2360 2361 #if NAMED_BIND 2362 2363 char * 2364 bestmx_map_lookup(map, name, av, statp) 2365 MAP *map; 2366 char *name; 2367 char **av; 2368 int *statp; 2369 { 2370 int nmx; 2371 auto int rcode; 2372 char *mxhosts[MAXMXHOSTS + 1]; 2373 2374 nmx = getmxrr(name, mxhosts, FALSE, &rcode); 2375 if (nmx <= 0) 2376 return NULL; 2377 if (bitset(MF_MATCHONLY, map->map_mflags)) 2378 return map_rewrite(map, name, strlen(name), NULL); 2379 else 2380 return map_rewrite(map, mxhosts[0], strlen(mxhosts[0]), av); 2381 } 2382 2383 #endif 2384 /* 2385 ** Program map type. 2386 ** 2387 ** This provides access to arbitrary programs. It should be used 2388 ** only very sparingly, since there is no way to bound the cost 2389 ** of invoking an arbitrary program. 2390 */ 2391 2392 char * 2393 prog_map_lookup(map, name, av, statp) 2394 MAP *map; 2395 char *name; 2396 char **av; 2397 int *statp; 2398 { 2399 int i; 2400 register char *p; 2401 int fd; 2402 auto pid_t pid; 2403 char *argv[MAXPV + 1]; 2404 char buf[MAXLINE]; 2405 2406 if (tTd(38, 20)) 2407 printf("prog_map_lookup(%s, %s) %s\n", 2408 map->map_mname, name, map->map_file); 2409 2410 i = 0; 2411 argv[i++] = map->map_file; 2412 strcpy(buf, map->map_rebuild); 2413 for (p = strtok(buf, " \t"); p != NULL; p = strtok(NULL, " \t")) 2414 { 2415 if (i >= MAXPV - 1) 2416 break; 2417 argv[i++] = p; 2418 } 2419 argv[i++] = name; 2420 argv[i] = NULL; 2421 pid = prog_open(argv, &fd, CurEnv); 2422 if (pid < 0) 2423 { 2424 if (tTd(38, 9)) 2425 printf("prog_map_lookup(%s) failed (%s) -- closing", 2426 map->map_mname, errstring(errno)); 2427 map->map_mflags &= ~(MF_VALID|MF_OPEN); 2428 return NULL; 2429 } 2430 i = read(fd, buf, sizeof buf - 1); 2431 if (i <= 0 && tTd(38, 2)) 2432 printf("prog_map_lookup(%s): read error %s\n", 2433 map->map_mname, errstring(errno)); 2434 if (i > 0) 2435 { 2436 char *rval; 2437 2438 buf[i] = '\0'; 2439 p = strchr(buf, '\n'); 2440 if (p != NULL) 2441 *p = '\0'; 2442 2443 /* collect the return value */ 2444 if (bitset(MF_MATCHONLY, map->map_mflags)) 2445 rval = map_rewrite(map, name, strlen(name), NULL); 2446 else 2447 rval = map_rewrite(map, buf, strlen(buf), NULL); 2448 2449 /* now flush any additional output */ 2450 while ((i = read(fd, buf, sizeof buf)) > 0) 2451 continue; 2452 close(fd); 2453 2454 /* and wait for the process to terminate */ 2455 *statp = waitfor(pid); 2456 2457 return rval; 2458 } 2459 2460 close(fd); 2461 *statp = waitfor(pid); 2462 return NULL; 2463 } 2464 /* 2465 ** Sequenced map type. 2466 ** 2467 ** Tries each map in order until something matches, much like 2468 ** implicit. Stores go to the first map in the list that can 2469 ** support storing. 2470 ** 2471 ** This is slightly unusual in that there are two interfaces. 2472 ** The "sequence" interface lets you stack maps arbitrarily. 2473 ** The "switch" interface builds a sequence map by looking 2474 ** at a system-dependent configuration file such as 2475 ** /etc/nsswitch.conf on Solaris or /etc/svc.conf on Ultrix. 2476 ** 2477 ** We don't need an explicit open, since all maps are 2478 ** opened during startup, including underlying maps. 2479 */ 2480 2481 /* 2482 ** SEQ_MAP_PARSE -- Sequenced map parsing 2483 */ 2484 2485 bool 2486 seq_map_parse(map, ap) 2487 MAP *map; 2488 char *ap; 2489 { 2490 int maxmap; 2491 2492 if (tTd(38, 2)) 2493 printf("seq_map_parse(%s, %s)\n", map->map_mname, ap); 2494 maxmap = 0; 2495 while (*ap != '\0') 2496 { 2497 register char *p; 2498 STAB *s; 2499 2500 /* find beginning of map name */ 2501 while (isascii(*ap) && isspace(*ap)) 2502 ap++; 2503 for (p = ap; isascii(*p) && isalnum(*p); p++) 2504 continue; 2505 if (*p != '\0') 2506 *p++ = '\0'; 2507 while (*p != '\0' && (!isascii(*p) || !isalnum(*p))) 2508 p++; 2509 if (*ap == '\0') 2510 { 2511 ap = p; 2512 continue; 2513 } 2514 s = stab(ap, ST_MAP, ST_FIND); 2515 if (s == NULL) 2516 { 2517 syserr("Sequence map %s: unknown member map %s", 2518 map->map_mname, ap); 2519 } 2520 else if (maxmap == MAXMAPSTACK) 2521 { 2522 syserr("Sequence map %s: too many member maps (%d max)", 2523 map->map_mname, MAXMAPSTACK); 2524 maxmap++; 2525 } 2526 else if (maxmap < MAXMAPSTACK) 2527 { 2528 map->map_stack[maxmap++] = &s->s_map; 2529 } 2530 ap = p; 2531 } 2532 return TRUE; 2533 } 2534 2535 2536 /* 2537 ** SWITCH_MAP_OPEN -- open a switched map 2538 ** 2539 ** This looks at the system-dependent configuration and builds 2540 ** a sequence map that does the same thing. 2541 ** 2542 ** Every system must define a switch_map_find routine in conf.c 2543 ** that will return the list of service types associated with a 2544 ** given service class. 2545 */ 2546 2547 bool 2548 switch_map_open(map, mode) 2549 MAP *map; 2550 int mode; 2551 { 2552 int mapno; 2553 int nmaps; 2554 char *maptype[MAXMAPSTACK]; 2555 2556 if (tTd(38, 2)) 2557 printf("switch_map_open(%s, %s, %d)\n", 2558 map->map_mname, map->map_file, mode); 2559 2560 nmaps = switch_map_find(map->map_file, maptype, map->map_return); 2561 if (tTd(38, 19)) 2562 { 2563 printf("\tswitch_map_find => %d\n", nmaps); 2564 for (mapno = 0; mapno < nmaps; mapno++) 2565 printf("\t\t%s\n", maptype[mapno]); 2566 } 2567 if (nmaps <= 0 || nmaps > MAXMAPSTACK) 2568 return FALSE; 2569 2570 for (mapno = 0; mapno < nmaps; mapno++) 2571 { 2572 register STAB *s; 2573 char nbuf[MAXNAME + 1]; 2574 2575 if (maptype[mapno] == NULL) 2576 continue; 2577 (void) sprintf(nbuf, "%s.%s", map->map_file, maptype[mapno]); 2578 s = stab(nbuf, ST_MAP, ST_FIND); 2579 if (s == NULL) 2580 { 2581 syserr("Switch map %s: unknown member map %s", 2582 map->map_mname, nbuf); 2583 } 2584 else 2585 { 2586 map->map_stack[mapno] = &s->s_map; 2587 if (tTd(38, 4)) 2588 printf("\tmap_stack[%d] = %s:%s\n", 2589 mapno, s->s_map.map_class->map_cname, 2590 nbuf); 2591 } 2592 } 2593 return TRUE; 2594 } 2595 2596 2597 /* 2598 ** SEQ_MAP_CLOSE -- close all underlying maps 2599 */ 2600 2601 seq_map_close(map) 2602 MAP *map; 2603 { 2604 int mapno; 2605 2606 if (tTd(38, 20)) 2607 printf("seq_map_close(%s)\n", map->map_mname); 2608 for (mapno = 0; mapno < MAXMAPSTACK; mapno++) 2609 { 2610 MAP *mm = map->map_stack[mapno]; 2611 2612 if (mm == NULL || !bitset(MF_OPEN, mm->map_mflags)) 2613 continue; 2614 mm->map_class->map_close(mm); 2615 mm->map_mflags &= ~(MF_OPEN|MF_WRITABLE); 2616 } 2617 } 2618 2619 2620 /* 2621 ** SEQ_MAP_LOOKUP -- sequenced map lookup 2622 */ 2623 2624 char * 2625 seq_map_lookup(map, key, args, pstat) 2626 MAP *map; 2627 char *key; 2628 char **args; 2629 int *pstat; 2630 { 2631 int mapno; 2632 int mapbit = 0x01; 2633 2634 if (tTd(38, 20)) 2635 printf("seq_map_lookup(%s, %s)\n", map->map_mname, key); 2636 2637 for (mapno = 0; mapno < MAXMAPSTACK; mapbit <<= 1, mapno++) 2638 { 2639 MAP *mm = map->map_stack[mapno]; 2640 int stat = 0; 2641 char *rv; 2642 2643 if (mm == NULL) 2644 continue; 2645 if (!bitset(MF_OPEN, mm->map_mflags)) 2646 { 2647 if (bitset(mapbit, map->map_return[MA_UNAVAIL])) 2648 { 2649 *pstat = EX_UNAVAILABLE; 2650 return NULL; 2651 } 2652 continue; 2653 } 2654 rv = mm->map_class->map_lookup(mm, key, args, &stat); 2655 if (rv != NULL) 2656 return rv; 2657 if (stat == 0 && bitset(mapbit, map->map_return[MA_NOTFOUND])) 2658 return NULL; 2659 if (stat != 0 && bitset(mapbit, map->map_return[MA_TRYAGAIN])) 2660 { 2661 *pstat = stat; 2662 return NULL; 2663 } 2664 } 2665 return NULL; 2666 } 2667 2668 2669 /* 2670 ** SEQ_MAP_STORE -- sequenced map store 2671 */ 2672 2673 void 2674 seq_map_store(map, key, val) 2675 MAP *map; 2676 char *key; 2677 char *val; 2678 { 2679 int mapno; 2680 2681 if (tTd(38, 12)) 2682 printf("seq_map_store(%s, %s, %s)\n", 2683 map->map_mname, key, val); 2684 2685 for (mapno = 0; mapno < MAXMAPSTACK; mapno++) 2686 { 2687 MAP *mm = map->map_stack[mapno]; 2688 2689 if (mm == NULL || !bitset(MF_WRITABLE, mm->map_mflags)) 2690 continue; 2691 2692 mm->map_class->map_store(mm, key, val); 2693 return; 2694 } 2695 syserr("seq_map_store(%s, %s, %s): no writable map", 2696 map->map_mname, key, val); 2697 } 2698 /* 2699 ** GETCANONNAME -- look up name using service switch 2700 ** 2701 ** Parameters: 2702 ** host -- the host name to look up. 2703 ** hbsize -- the size of the host buffer. 2704 ** trymx -- if set, try MX records. 2705 ** 2706 ** Returns: 2707 ** TRUE -- if the host was found. 2708 ** FALSE -- otherwise. 2709 */ 2710 2711 bool 2712 getcanonname(host, hbsize, trymx) 2713 char *host; 2714 int hbsize; 2715 bool trymx; 2716 { 2717 int nmaps; 2718 int mapno; 2719 bool found = FALSE; 2720 auto int stat; 2721 char *maptype[MAXMAPSTACK]; 2722 short mapreturn[MAXMAPACTIONS]; 2723 extern int h_errno; 2724 2725 nmaps = switch_map_find("hosts", maptype, mapreturn); 2726 for (mapno = 0; mapno < nmaps; mapno++) 2727 { 2728 int i; 2729 2730 if (tTd(38, 20)) 2731 printf("getcanonname(%s), trying %s\n", 2732 host, maptype[mapno]); 2733 if (strcmp("files", maptype[mapno]) == 0) 2734 found = text_getcanonname(host, hbsize, &stat); 2735 #ifdef NIS 2736 else if (strcmp("nis", maptype[mapno]) == 0) 2737 found = nis_getcanonname(host, hbsize, &stat); 2738 #endif 2739 #ifdef NISPLUS 2740 else if (strcmp("nisplus", maptype[mapno]) == 0) 2741 found = nisplus_getcanonname(host, hbsize, &stat); 2742 #endif 2743 #if NAMED_BIND 2744 else if (strcmp("dns", maptype[mapno]) == 0) 2745 found = dns_getcanonname(host, hbsize, trymx, &stat); 2746 #endif 2747 else 2748 { 2749 found = FALSE; 2750 stat = EX_UNAVAILABLE; 2751 } 2752 if (found) 2753 break; 2754 2755 /* see if we should continue */ 2756 if (stat == EX_TEMPFAIL) 2757 i = MA_TRYAGAIN; 2758 else if (stat == EX_NOHOST) 2759 i = MA_NOTFOUND; 2760 else 2761 i = MA_UNAVAIL; 2762 if (bitset(1 << mapno, mapreturn[i])) 2763 break; 2764 } 2765 2766 if (found) 2767 { 2768 char *d; 2769 2770 if (tTd(38, 20)) 2771 printf("getcanonname(%s), found\n", host); 2772 2773 /* 2774 ** If returned name is still single token, compensate 2775 ** by tagging on $m. This is because some sites set 2776 ** up their DNS or NIS databases wrong. 2777 */ 2778 2779 if ((d = strchr(host, '.')) == NULL || d[1] == '\0') 2780 { 2781 d = macvalue('m', CurEnv); 2782 if (d != NULL && 2783 hbsize > (int) (strlen(host) + strlen(d) + 1)) 2784 { 2785 if (host[strlen(host) - 1] != '.') 2786 strcat(host, "."); 2787 strcat(host, d); 2788 } 2789 else 2790 { 2791 return FALSE; 2792 } 2793 } 2794 return TRUE; 2795 } 2796 2797 if (tTd(38, 20)) 2798 printf("getcanonname(%s), failed, stat=%d\n", host, stat); 2799 2800 #if NAMED_BIND 2801 if (stat == EX_NOHOST) 2802 h_errno = HOST_NOT_FOUND; 2803 else 2804 h_errno = TRY_AGAIN; 2805 #endif 2806 2807 return FALSE; 2808 } 2809 /* 2810 ** NULL stubs 2811 */ 2812 2813 bool 2814 null_map_open(map, mode) 2815 MAP *map; 2816 int mode; 2817 { 2818 return TRUE; 2819 } 2820 2821 void 2822 null_map_close(map) 2823 MAP *map; 2824 { 2825 return; 2826 } 2827 2828 void 2829 null_map_store(map, key, val) 2830 MAP *map; 2831 char *key; 2832 char *val; 2833 { 2834 return; 2835 } 2836 2837 2838 /* 2839 ** BOGUS stubs 2840 */ 2841 2842 char * 2843 bogus_map_lookup(map, key, args, pstat) 2844 MAP *map; 2845 char *key; 2846 char **args; 2847 int *pstat; 2848 { 2849 *pstat = EX_TEMPFAIL; 2850 return NULL; 2851 } 2852 2853 MAPCLASS BogusMapClass = 2854 { 2855 "bogus-map", NULL, 0, 2856 NULL, bogus_map_lookup, null_map_store, 2857 null_map_open, null_map_close, 2858 }; 2859