source/registry/reg_db.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Virtual Windows Registry Layer
   4  *  Copyright (C) Gerald Carter                     2002-2005
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /* Implementation of internal registry database functions. */
  21
  22 #include "includes.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_REGISTRY
  26
  27 static struct tdb_wrap *tdb_reg = NULL;
  28 static int tdb_refcount;
  29
  30 /* List the deepest path into the registry.  All part components will be created.*/
  31
  32 /* If you want to have a part of the path controlled by the tdb and part by
  33    a virtual registry db (e.g. printing), then you have to list the deepest path.
  34    For example,"HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion/Print"
  35    allows the reg_db backend to handle everything up to
  36    "HKLM/SOFTWARE/Microsoft/Windows NT/CurrentVersion" and then we'll hook
  37    the reg_printing backend onto the last component of the path (see
  38    KEY_PRINTING_2K in include/rpc_reg.h)   --jerry */
  39
  40 static const char *builtin_registry_paths[] = {
  41         KEY_PRINTING_2K,
  42         KEY_PRINTING_PORTS,
  43         KEY_PRINTING,
  44         KEY_SHARES,
  45         KEY_EVENTLOG,
  46         KEY_SMBCONF,
  47         "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib",
  48         "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Perflib\\009",
  49         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Print\\Monitors",
  50         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\ProductOptions",
  51         "HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal Server\\DefaultUserConfiguration",
  52         "HKLM\\SYSTEM\\CurrentControlSet\\Services\\TcpIp\\Parameters",
  53         "HKLM\\SYSTEM\\CurrentControlSet\\Services\\Netlogon\\Parameters",
  54         "HKU",
  55         "HKCR",
  56         "HKPD",
  57         "HKPT",
  58          NULL };
  59
  60 struct builtin_regkey_value {
  61         const char *path;
  62         const char *valuename;
  63         uint32 type;
  64         union {
  65                 const char *string;
  66                 uint32 dw_value;
  67         } data;
  68 };
  69
  70 static struct builtin_regkey_value builtin_registry_values[] = {
  71         { KEY_PRINTING_PORTS,
  72                 SAMBA_PRINTER_PORT_NAME, REG_SZ, { "" } },
  73         { KEY_PRINTING_2K,
  74                 "DefaultSpoolDirectory", REG_SZ, { "C:\\Windows\\System32\\Spool\\Printers" } },
  75         { KEY_EVENTLOG,
  76                 "DisplayName", REG_SZ, { "Event Log" } },
  77         { KEY_EVENTLOG,
  78                 "ErrorControl", REG_DWORD, { (char*)0x00000001 } },
  79         { NULL, NULL, 0, { NULL } }
  80 };
  81
  82 /***********************************************************************
  83  Open the registry data in the tdb
  84  ***********************************************************************/
  85
  86 static BOOL init_registry_data( void )
  87 {
  88         pstring path, base, remaining;
  89         fstring keyname, subkeyname;
  90         REGSUBKEY_CTR *subkeys;
  91         REGVAL_CTR *values;
  92         int i;
  93         const char *p, *p2;
  94         UNISTR2 data;
  95
  96         /*
  97          * There are potentially quite a few store operations which are all
  98          * indiviually wrapped in tdb transactions. Wrapping them in a single
  99          * transaction gives just a single transaction_commit() to actually do
 100          * its fsync()s. See tdb/common/transaction.c for info about nested
 101          * transaction behaviour.
 102          */
 103
 104         if ( tdb_transaction_start( tdb_reg->tdb ) == -1 ) {
 105                 DEBUG(0, ("init_registry_data: tdb_transaction_start "
 106                           "failed\n"));
 107                 return False;
 108         }
 109
 110         /* loop over all of the predefined paths and add each component */
 111
 112         for ( i=0; builtin_registry_paths[i] != NULL; i++ ) {
 113
 114                 DEBUG(6,("init_registry_data: Adding [%s]\n", builtin_registry_paths[i]));
 115
 116                 pstrcpy( path, builtin_registry_paths[i] );
 117                 pstrcpy( base, "" );
 118                 p = path;
 119
 120                 while ( next_token(&p, keyname, "\\", sizeof(keyname)) ) {
 121
 122                         /* build up the registry path from the components */
 123
 124                         if ( *base )
 125                                 pstrcat( base, "\\" );
 126                         pstrcat( base, keyname );
 127
 128                         /* get the immediate subkeyname (if we have one ) */
 129
 130                         *subkeyname = '\0';
 131                         if ( *p ) {
 132                                 pstrcpy( remaining, p );
 133                                 p2 = remaining;
 134
 135                                 if ( !next_token(&p2, subkeyname, "\\", sizeof(subkeyname)) )
 136                                         fstrcpy( subkeyname, p2 );
 137                         }
 138
 139                         DEBUG(10,("init_registry_data: Storing key [%s] with subkey [%s]\n",
 140                                 base, *subkeyname ? subkeyname : "NULL"));
 141
 142                         /* we don't really care if the lookup succeeds or not since
 143                            we are about to update the record.  We just want any
 144                            subkeys already present */
 145
 146                         if ( !(subkeys = TALLOC_ZERO_P( NULL, REGSUBKEY_CTR )) ) {
 147                                 DEBUG(0,("talloc() failure!\n"));
 148                                 goto fail;
 149                         }
 150
 151                         regdb_fetch_keys( base, subkeys );
 152                         if ( *subkeyname )
 153                                 regsubkey_ctr_addkey( subkeys, subkeyname );
 154                         if ( !regdb_store_keys( base, subkeys ))
 155                                 goto fail;
 156
 157                         TALLOC_FREE( subkeys );
 158                 }
 159         }
 160
 161         /* loop over all of the predefined values and add each component */
 162
 163         for ( i=0; builtin_registry_values[i].path != NULL; i++ ) {
 164                 if ( !(values = TALLOC_ZERO_P( NULL, REGVAL_CTR )) ) {
 165                         DEBUG(0,("talloc() failure!\n"));
 166                         goto fail;
 167                 }
 168
 169                 regdb_fetch_values( builtin_registry_values[i].path, values );
 170
 171                 /* preserve existing values across restarts.  Only add new ones */
 172
 173                 if ( !regval_ctr_key_exists( values, builtin_registry_values[i].valuename ) )
 174                 {
 175                         switch( builtin_registry_values[i].type ) {
 176                         case REG_DWORD:
 177                                 regval_ctr_addvalue( values,
 178                                                      builtin_registry_values[i].valuename,
 179                                                      REG_DWORD,
 180                                                      (char*)&builtin_registry_values[i].data.dw_value,
 181                                                      sizeof(uint32) );
 182                                 break;
 183
 184                         case REG_SZ:
 185                                 init_unistr2( &data, builtin_registry_values[i].data.string, UNI_STR_TERMINATE);
 186                                 regval_ctr_addvalue( values,
 187                                                      builtin_registry_values[i].valuename,
 188                                                      REG_SZ,
 189                                                      (char*)data.buffer,
 190                                                      data.uni_str_len*sizeof(uint16) );
 191                                 break;
 192
 193                         default:
 194                                 DEBUG(0,("init_registry_data: invalid value type in builtin_registry_values [%d]\n",
 195                                         builtin_registry_values[i].type));
 196                         }
 197                         regdb_store_values( builtin_registry_values[i].path, values );
 198                 }
 199
 200                 TALLOC_FREE( values );
 201         }
 202
 203         if (tdb_transaction_commit( tdb_reg->tdb ) == -1) {
 204                 DEBUG(0, ("init_registry_data: Could not commit "
 205                           "transaction\n"));
 206                 return False;
 207         }
 208
 209         return True;
 210
 211  fail:
 212
 213         if (tdb_transaction_cancel( tdb_reg->tdb ) == -1) {
 214                 smb_panic("init_registry_data: tdb_transaction_cancel "
 215                           "failed\n");
 216         }
 217
 218         return False;
 219 }
 220
 221 /***********************************************************************
 222  Open the registry database
 223  ***********************************************************************/
 224
 225 BOOL regdb_init( void )
 226 {
 227         const char *vstring = "INFO/version";
 228         uint32 vers_id;
 229
 230         if ( tdb_reg )
 231                 return True;
 232
 233         if ( !(tdb_reg = tdb_wrap_open(NULL, lock_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR, 0600)) )
 234         {
 235                 tdb_reg = tdb_wrap_open(NULL, lock_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR|O_CREAT, 0600);
 236                 if ( !tdb_reg ) {
 237                         DEBUG(0,("regdb_init: Failed to open registry %s (%s)\n",
 238                                 lock_path("registry.tdb"), strerror(errno) ));
 239                         return False;
 240                 }
 241
 242                 DEBUG(10,("regdb_init: Successfully created registry tdb\n"));
 243         }
 244
 245         tdb_refcount = 1;
 246
 247         vers_id = tdb_fetch_int32(tdb_reg->tdb, vstring);
 248
 249         if ( vers_id != REGVER_V1 ) {
 250                 /* any upgrade code here if needed */
 251                 DEBUG(10, ("regdb_init: got INFO/version = %d != %d\n",
 252                            vers_id, REGVER_V1));
 253         }
 254
 255         /* always setup the necessary keys and values */
 256
 257         if ( !init_registry_data() ) {
 258                 DEBUG(0,("init_registry: Failed to initialize data in registry!\n"));
 259                 return False;
 260         }
 261
 262         return True;
 263 }
 264
 265 /***********************************************************************
 266  Open the registry.  Must already have been initialized by regdb_init()
 267  ***********************************************************************/
 268
 269 WERROR regdb_open( void )
 270 {
 271         WERROR result = WERR_OK;
 272
 273         if ( tdb_reg ) {
 274                 DEBUG(10,("regdb_open: incrementing refcount (%d)\n", tdb_refcount));
 275                 tdb_refcount++;
 276                 return WERR_OK;
 277         }
 278
 279         become_root();
 280
 281         tdb_reg = tdb_wrap_open(NULL, lock_path("registry.tdb"), 0, REG_TDB_FLAGS, O_RDWR, 0600);
 282         if ( !tdb_reg ) {
 283                 result = ntstatus_to_werror( map_nt_error_from_unix( errno ) );
 284                 DEBUG(0,("regdb_open: Failed to open %s! (%s)\n",
 285                         lock_path("registry.tdb"), strerror(errno) ));
 286         }
 287
 288         unbecome_root();
 289
 290         tdb_refcount = 1;
 291         DEBUG(10,("regdb_open: refcount reset (%d)\n", tdb_refcount));
 292
 293         return result;
 294 }
 295
 296 /***********************************************************************
 297  ***********************************************************************/
 298
 299 int regdb_close( void )
 300 {
 301         tdb_refcount--;
 302
 303         DEBUG(10,("regdb_close: decrementing refcount (%d)\n", tdb_refcount));
 304
 305         if ( tdb_refcount > 0 )
 306                 return 0;
 307
 308         SMB_ASSERT( tdb_refcount >= 0 );
 309
 310         TALLOC_FREE(tdb_reg);
 311         return 0;
 312 }
 313
 314 /***********************************************************************
 315  return the tdb sequence number of the registry tdb.
 316  this is an indicator for the content of the registry
 317  having changed. it will change upon regdb_init, too, though.
 318  ***********************************************************************/
 319 int regdb_get_seqnum(void)
 320 {
 321         return tdb_get_seqnum(tdb_reg->tdb);
 322 }
 323
 324 /***********************************************************************
 325  Add subkey strings to the registry tdb under a defined key
 326  fmt is the same format as tdb_pack except this function only supports
 327  fstrings
 328  ***********************************************************************/
 329
 330 static BOOL regdb_store_keys_internal( const char *key, REGSUBKEY_CTR *ctr )
 331 {
 332         TDB_DATA dbuf;
 333         uint8 *buffer;
 334         int i = 0;
 335         uint32 len, buflen;
 336         BOOL ret = True;
 337         uint32 num_subkeys = regsubkey_ctr_numkeys( ctr );
 338         pstring keyname;
 339
 340         if ( !key )
 341                 return False;
 342
 343         pstrcpy( keyname, key );
 344         normalize_reg_path( keyname );
 345
 346         /* allocate some initial memory */
 347
 348         if (!(buffer = (uint8 *)SMB_MALLOC(sizeof(pstring)))) {
 349                 return False;
 350         }
 351         buflen = sizeof(pstring);
 352         len = 0;
 353
 354         /* store the number of subkeys */
 355
 356         len += tdb_pack(buffer+len, buflen-len, "d", num_subkeys );
 357
 358         /* pack all the strings */
 359
 360         for (i=0; i<num_subkeys; i++) {
 361                 len += tdb_pack( buffer+len, buflen-len, "f", regsubkey_ctr_specific_key(ctr, i) );
 362                 if ( len > buflen ) {
 363                         /* allocate some extra space */
 364                         if ((buffer = (uint8 *)SMB_REALLOC( buffer, len*2 )) == NULL) {
 365                                 DEBUG(0,("regdb_store_keys: Failed to realloc memory of size [%d]\n", len*2));
 366                                 ret = False;
 367                                 goto done;
 368                         }
 369                         buflen = len*2;
 370
 371                         len = tdb_pack( buffer+len, buflen-len, "f", regsubkey_ctr_specific_key(ctr, i) );
 372                 }
 373         }
 374
 375         /* finally write out the data */
 376
 377         dbuf.dptr = buffer;
 378         dbuf.dsize = len;
 379         if ( tdb_store_bystring( tdb_reg->tdb, keyname, dbuf, TDB_REPLACE ) == -1) {
 380                 ret = False;
 381                 goto done;
 382         }
 383
 384 done:
 385         SAFE_FREE( buffer );
 386
 387         return ret;
 388 }
 389
 390 /***********************************************************************
 391  Store the new subkey record and create any child key records that
 392  do not currently exist
 393  ***********************************************************************/
 394
 395 BOOL regdb_store_keys( const char *key, REGSUBKEY_CTR *ctr )
 396 {
 397         int num_subkeys, i;
 398         pstring path;
 399         REGSUBKEY_CTR *subkeys = NULL, *old_subkeys = NULL;
 400         char *oldkeyname;
 401
 402         /*
 403          * fetch a list of the old subkeys so we can determine if anything has
 404          * changed
 405          */
 406
 407         if ( !(old_subkeys = TALLOC_ZERO_P( ctr, REGSUBKEY_CTR )) ) {
 408                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 409                 goto fail;
 410         }
 411
 412         regdb_fetch_keys( key, old_subkeys );
 413
 414         if (ctr->num_subkeys == old_subkeys->num_subkeys) {
 415
 416                 for (i = 0; i<ctr->num_subkeys; i++) {
 417                         if (strcmp(ctr->subkeys[i],
 418                                    old_subkeys->subkeys[i]) != 0) {
 419                                 break;
 420                         }
 421                 }
 422                 if (i == ctr->num_subkeys) {
 423                         /*
 424                          * Nothing changed, no point to even start a tdb
 425                          * transaction
 426                          */
 427                         TALLOC_FREE(old_subkeys);
 428                         return True;
 429                 }
 430         }
 431
 432         if ( tdb_transaction_start( tdb_reg->tdb ) == -1 ) {
 433                 DEBUG(0, ("regdb_store_keys: tdb_transaction_start failed\n"));
 434                 return False;
 435         }
 436
 437         /*
 438          * Re-fetch the old keys inside the transaction
 439          */
 440
 441         TALLOC_FREE(old_subkeys);
 442
 443         if ( !(old_subkeys = TALLOC_ZERO_P( ctr, REGSUBKEY_CTR )) ) {
 444                 DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 445                 goto fail;
 446         }
 447
 448         regdb_fetch_keys( key, old_subkeys );
 449
 450         /* store the subkey list for the parent */
 451
 452         if ( !regdb_store_keys_internal( key, ctr ) ) {
 453                 DEBUG(0,("regdb_store_keys: Failed to store new subkey list "
 454                          "for parent [%s]\n", key ));
 455                 goto fail;
 456         }
 457
 458         /* now delete removed keys */
 459
 460         num_subkeys = regsubkey_ctr_numkeys( old_subkeys );
 461         for ( i=0; i<num_subkeys; i++ ) {
 462                 oldkeyname = regsubkey_ctr_specific_key( old_subkeys, i );
 463
 464                 if ( regsubkey_ctr_key_exists( ctr, oldkeyname ) ) {
 465                         /*
 466                          * It's still around, don't delete
 467                          */
 468
 469                         continue;
 470                 }
 471
 472                 pstr_sprintf( path, "%s/%s", key, oldkeyname );
 473                 normalize_reg_path( path );
 474                 if (tdb_delete_bystring( tdb_reg->tdb, path ) == -1) {
 475                         DEBUG(1, ("Deleting %s failed\n", path));
 476                         goto fail;
 477                 }
 478
 479                 pstr_sprintf( path, "%s/%s/%s", REG_VALUE_PREFIX, key,
 480                               oldkeyname );
 481                 normalize_reg_path( path );
 482
 483                 /*
 484                  * Ignore errors here, we might have no values around
 485                  */
 486                 tdb_delete_bystring( tdb_reg->tdb, path );
 487         }
 488
 489         TALLOC_FREE( old_subkeys );
 490
 491         /* now create records for any subkeys that don't already exist */
 492
 493         num_subkeys = regsubkey_ctr_numkeys( ctr );
 494         for ( i=0; i<num_subkeys; i++ ) {
 495                 pstr_sprintf( path, "%s/%s", key,
 496                               regsubkey_ctr_specific_key( ctr, i ) );
 497
 498                 if ( !(subkeys = TALLOC_ZERO_P( ctr, REGSUBKEY_CTR )) ) {
 499                         DEBUG(0,("regdb_store_keys: talloc() failure!\n"));
 500                         goto fail;
 501                 }
 502
 503                 if ( regdb_fetch_keys( path, subkeys ) == -1 ) {
 504                         /* create a record with 0 subkeys */
 505                         if ( !regdb_store_keys_internal( path, subkeys ) ) {
 506                                 DEBUG(0,("regdb_store_keys: Failed to store "
 507                                          "new record for key [%s]\n", path ));
 508                                 goto fail;
 509                         }
 510                 }
 511
 512                 TALLOC_FREE( subkeys );
 513         }
 514
 515         if (tdb_transaction_commit( tdb_reg->tdb ) == -1) {
 516                 DEBUG(0, ("regdb_store_keys: Could not commit transaction\n"));
 517                 return False;
 518         }
 519
 520         return True;
 521
 522  fail:
 523         TALLOC_FREE( old_subkeys );
 524         TALLOC_FREE( subkeys );
 525
 526         if (tdb_transaction_cancel( tdb_reg->tdb ) == -1) {
 527                 smb_panic("regdb_store_keys: tdb_transaction_cancel failed\n");
 528         }
 529
 530         return False;
 531 }
 532
 533
 534 /***********************************************************************
 535  Retrieve an array of strings containing subkeys.  Memory should be
 536  released by the caller.
 537  ***********************************************************************/
 538
 539 int regdb_fetch_keys( const char* key, REGSUBKEY_CTR *ctr )
 540 {
 541         pstring path;
 542         uint32 num_items;
 543         TDB_DATA dbuf;
 544         uint8 *buf;
 545         uint32 buflen, len;
 546         int i;
 547         fstring subkeyname;
 548
 549         DEBUG(11,("regdb_fetch_keys: Enter key => [%s]\n", key ? key : "NULL"));
 550
 551         pstrcpy( path, key );
 552
 553         /* convert to key format */
 554         pstring_sub( path, "\\", "/" );
 555         strupper_m( path );
 556
 557         dbuf = tdb_fetch_bystring( tdb_reg->tdb, path );
 558
 559         buf = dbuf.dptr;
 560         buflen = dbuf.dsize;
 561
 562         if ( !buf ) {
 563                 DEBUG(5,("regdb_fetch_keys: tdb lookup failed to locate key [%s]\n", key));
 564                 return -1;
 565         }
 566
 567         len = tdb_unpack( buf, buflen, "d", &num_items);
 568
 569         for (i=0; i<num_items; i++) {
 570                 len += tdb_unpack( buf+len, buflen-len, "f", subkeyname );
 571                 regsubkey_ctr_addkey( ctr, subkeyname );
 572         }
 573
 574         SAFE_FREE( dbuf.dptr );
 575
 576         DEBUG(11,("regdb_fetch_keys: Exit [%d] items\n", num_items));
 577
 578         return num_items;
 579 }
 580
 581 /****************************************************************************
 582  Unpack a list of registry values frem the TDB
 583  ***************************************************************************/
 584
 585 static int regdb_unpack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 586 {
 587         int             len = 0;
 588         uint32          type;
 589         pstring         valuename;
 590         uint32          size;
 591         uint8           *data_p;
 592         uint32          num_values = 0;
 593         int             i;
 594
 595
 596
 597         /* loop and unpack the rest of the registry values */
 598
 599         len += tdb_unpack(buf+len, buflen-len, "d", &num_values);
 600
 601         for ( i=0; i<num_values; i++ ) {
 602                 /* unpack the next regval */
 603
 604                 type = REG_NONE;
 605                 size = 0;
 606                 data_p = NULL;
 607                 len += tdb_unpack(buf+len, buflen-len, "fdB",
 608                                   valuename,
 609                                   &type,
 610                                   &size,
 611                                   &data_p);
 612
 613                 /* add the new value. Paranoid protective code -- make sure data_p is valid */
 614
 615                 if ( size && data_p ) {
 616                         regval_ctr_addvalue( values, valuename, type, (const char *)data_p, size );
 617                         SAFE_FREE(data_p); /* 'B' option to tdb_unpack does a malloc() */
 618                 }
 619
 620                 DEBUG(8,("specific: [%s], len: %d\n", valuename, size));
 621         }
 622
 623         return len;
 624 }
 625
 626 /****************************************************************************
 627  Pack all values in all printer keys
 628  ***************************************************************************/
 629
 630 static int regdb_pack_values(REGVAL_CTR *values, uint8 *buf, int buflen)
 631 {
 632         int             len = 0;
 633         int             i;
 634         REGISTRY_VALUE  *val;
 635         int             num_values;
 636
 637         if ( !values )
 638                 return 0;
 639
 640         num_values = regval_ctr_numvals( values );
 641
 642         /* pack the number of values first */
 643
 644         len += tdb_pack( buf+len, buflen-len, "d", num_values );
 645
 646         /* loop over all values */
 647
 648         for ( i=0; i<num_values; i++ ) {
 649                 val = regval_ctr_specific_value( values, i );
 650                 len += tdb_pack(buf+len, buflen-len, "fdB",
 651                                 regval_name(val),
 652                                 regval_type(val),
 653                                 regval_size(val),
 654                                 regval_data_p(val) );
 655         }
 656
 657         return len;
 658 }
 659
 660 /***********************************************************************
 661  Retrieve an array of strings containing subkeys.  Memory should be
 662  released by the caller.
 663  ***********************************************************************/
 664
 665 int regdb_fetch_values( const char* key, REGVAL_CTR *values )
 666 {
 667         TDB_DATA data;
 668         pstring keystr;
 669
 670         DEBUG(10,("regdb_fetch_values: Looking for value of key [%s] \n", key));
 671
 672         pstr_sprintf( keystr, "%s/%s", REG_VALUE_PREFIX, key );
 673         normalize_reg_path( keystr );
 674
 675         data = tdb_fetch_bystring( tdb_reg->tdb, keystr );
 676
 677         if ( !data.dptr ) {
 678                 /* all keys have zero values by default */
 679                 return 0;
 680         }
 681
 682         regdb_unpack_values( values, data.dptr, data.dsize );
 683
 684         SAFE_FREE( data.dptr );
 685
 686         return regval_ctr_numvals(values);
 687 }
 688
 689 /***********************************************************************
 690  Stub function since we do not currently support storing registry
 691  values in the registry.tdb
 692  ***********************************************************************/
 693
 694 BOOL regdb_store_values( const char *key, REGVAL_CTR *values )
 695 {
 696         TDB_DATA old_data, data;
 697         pstring keystr;
 698         int len, ret;
 699
 700         DEBUG(10,("regdb_store_values: Looking for value of key [%s] \n", key));
 701
 702         ZERO_STRUCT( data );
 703
 704         len = regdb_pack_values( values, data.dptr, data.dsize );
 705         if ( len <= 0 ) {
 706                 DEBUG(0,("regdb_store_values: unable to pack values. len <= 0\n"));
 707                 return False;
 708         }
 709
 710         data.dptr = SMB_MALLOC_ARRAY( uint8, len );
 711         data.dsize = len;
 712
 713         len = regdb_pack_values( values, data.dptr, data.dsize );
 714
 715         SMB_ASSERT( len == data.dsize );
 716
 717         pstr_sprintf( keystr, "%s/%s", REG_VALUE_PREFIX, key );
 718         normalize_reg_path( keystr );
 719
 720         old_data = tdb_fetch_bystring(tdb_reg->tdb, keystr);
 721
 722         if ((old_data.dptr != NULL)
 723             && (old_data.dsize == data.dsize)
 724             && (memcmp(old_data.dptr, data.dptr, data.dsize) == 0)) {
 725                 SAFE_FREE(old_data.dptr);
 726                 SAFE_FREE(data.dptr);
 727                 return True;
 728         }
 729
 730         ret = tdb_trans_store_bystring(tdb_reg->tdb, keystr, data, TDB_REPLACE);
 731
 732         SAFE_FREE( old_data.dptr );
 733         SAFE_FREE( data.dptr );
 734
 735         return ret != -1 ;
 736 }
 737
 738 static WERROR regdb_get_secdesc(TALLOC_CTX *mem_ctx, const char *key,
 739                                 struct security_descriptor **psecdesc)
 740 {
 741         char *tdbkey;
 742         TDB_DATA data;
 743         NTSTATUS status;
 744
 745         DEBUG(10, ("regdb_get_secdesc: Getting secdesc of key [%s]\n", key));
 746
 747         if (asprintf(&tdbkey, "%s/%s", REG_SECDESC_PREFIX, key) == -1) {
 748                 return WERR_NOMEM;
 749         }
 750         normalize_dbkey(tdbkey);
 751
 752         data = tdb_fetch_bystring(tdb_reg->tdb, tdbkey);
 753         SAFE_FREE(tdbkey);
 754
 755         if (data.dptr == NULL) {
 756                 return WERR_BADFILE;
 757         }
 758
 759         status = unmarshall_sec_desc(mem_ctx, (uint8 *)data.dptr, data.dsize,
 760                                      psecdesc);
 761
 762         SAFE_FREE(data.dptr);
 763
 764         if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MEMORY)) {
 765                 return WERR_NOMEM;
 766         }
 767
 768         if (!NT_STATUS_IS_OK(status)) {
 769                 return WERR_REG_CORRUPT;
 770         }
 771
 772         return WERR_OK;
 773 }
 774
 775 static WERROR regdb_set_secdesc(const char *key,
 776                                 struct security_descriptor *secdesc)
 777 {
 778         prs_struct ps;
 779         TALLOC_CTX *mem_ctx;
 780         char *tdbkey;
 781         WERROR err = WERR_NOMEM;
 782         TDB_DATA tdbdata;
 783
 784         if (!(mem_ctx = talloc_init("regdb_set_secdesc"))) {
 785                 return WERR_NOMEM;
 786         }
 787
 788         ZERO_STRUCT(ps);
 789
 790         if (!(tdbkey = talloc_asprintf(mem_ctx, "%s/%s", REG_SECDESC_PREFIX,
 791                                        key))) {
 792                 goto done;
 793         }
 794         normalize_dbkey(tdbkey);
 795
 796         err = ntstatus_to_werror(marshall_sec_desc(mem_ctx, secdesc,
 797                                                    &tdbdata.dptr,
 798                                                    &tdbdata.dsize));
 799         if (!W_ERROR_IS_OK(err)) {
 800                 goto done;
 801         }
 802
 803         if (tdb_trans_store_bystring(tdb_reg->tdb, tdbkey, tdbdata, 0) == -1) {
 804                 err = ntstatus_to_werror(map_nt_error_from_unix(errno));
 805                 goto done;
 806         }
 807
 808  done:
 809         prs_mem_free(&ps);
 810         TALLOC_FREE(mem_ctx);
 811         return err;
 812 }
 813
 814 /*
 815  * Table of function pointers for default access
 816  */
 817
 818 REGISTRY_OPS regdb_ops = {
 819         regdb_fetch_keys,
 820         regdb_fetch_values,
 821         regdb_store_keys,
 822         regdb_store_values,
 823         NULL,
 824         regdb_get_secdesc,
 825         regdb_set_secdesc
 826 };