source4/lib/ldb/ldb_sqlite3/ldb_sqlite3.c

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Derrell Lipman  2005
   5    Copyright (C) Simo Sorce 2005
   6
   7    ** NOTE! The following LGPL license applies to the ldb
   8    ** library. This does NOT imply that all of Samba is released
   9    ** under the LGPL
  10
  11    This library is free software; you can redistribute it and/or
  12    modify it under the terms of the GNU Lesser General Public
  13    License as published by the Free Software Foundation; either
  14    version 2 of the License, or (at your option) any later version.
  15
  16    This library is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License for more details.
  20
  21    You should have received a copy of the GNU Lesser General Public
  22    License along with this library; if not, write to the Free Software
  23    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24 */
  25
  26 /*
  27  *  Name: ldb
  28  *
  29  *  Component: ldb sqlite3 backend
  30  *
  31  *  Description: core files for SQLITE3 backend
  32  *
  33  *  Author: Derrell Lipman (based on Andrew Tridgell's LDAP backend)
  34  */
  35
  36 #include "includes.h"
  37 #include "ldb/include/includes.h"
  38
  39 #include <sqlite3.h>
  40
  41 struct lsqlite3_private {
  42         int trans_count;
  43         char **options;
  44         sqlite3 *sqlite;
  45 };
  46
  47 struct lsql_async_context {
  48         struct ldb_module *module;
  49
  50         /* search stuff */
  51         long long current_eid;
  52         const char * const * attrs;
  53         struct ldb_async_result *ares;
  54
  55         /* async stuff */
  56         void *context;
  57         int (*callback)(struct ldb_context *, void *, struct ldb_async_result *);
  58 };
  59
  60 static struct ldb_async_handle *init_lsql_handle(struct lsqlite3_private *lsqlite3, struct ldb_module *module,
  61                                                  void *context,
  62                                                  int (*callback)(struct ldb_context *, void *, struct ldb_async_result *))
  63 {
  64         struct lsql_async_context *ac;
  65         struct ldb_async_handle *h;
  66
  67         h = talloc_zero(lsqlite3, struct ldb_async_handle);
  68         if (h == NULL) {
  69                 ldb_set_errstring(module->ldb, talloc_asprintf(module, "Out of Memory"));
  70                 return NULL;
  71         }
  72
  73         ac = talloc(h, struct lsql_async_context);
  74         if (ac == NULL) {
  75                 ldb_set_errstring(module->ldb, talloc_asprintf(module, "Out of Memory"));
  76                 talloc_free(h);
  77                 return NULL;
  78         }
  79
  80         h->private_data = (void *)ac;
  81
  82         ac->module = module;
  83         ac->context = context;
  84         ac->callback = callback;
  85
  86         return h;
  87 }
  88
  89 /*
  90  * Macros used throughout
  91  */
  92
  93 #ifndef FALSE
  94 # define FALSE  (0)
  95 # define TRUE   (! FALSE)
  96 #endif
  97
  98 #define RESULT_ATTR_TABLE       "temp_result_attrs"
  99
 100 //#define TEMPTAB                 /* for testing, create non-temporary table */
 101 #define TEMPTAB                 "TEMPORARY"
 102
 103 /*
 104  * Static variables
 105  */
 106 sqlite3_stmt *  stmtGetEID = NULL;
 107
 108 static char *lsqlite3_tprintf(TALLOC_CTX *mem_ctx, const char *fmt, ...)
 109 {
 110         char *str, *ret;
 111         va_list ap;
 112
 113         va_start(ap, fmt);
 114         str = sqlite3_vmprintf(fmt, ap);
 115         va_end(ap);
 116
 117         if (str == NULL) return NULL;
 118
 119         ret = talloc_strdup(mem_ctx, str);
 120         if (ret == NULL) {
 121                 sqlite3_free(str);
 122                 return NULL;
 123         }
 124
 125         sqlite3_free(str);
 126         return ret;
 127 }
 128
 129 static char base160tab[161] = {
 130         48 ,49 ,50 ,51 ,52 ,53 ,54 ,55 ,56 ,57 , /* 0-9 */
 131         58 ,59 ,65 ,66 ,67 ,68 ,69 ,70 ,71 ,72 , /* : ; A-H */
 132         73 ,74 ,75 ,76 ,77 ,78 ,79 ,80 ,81 ,82 , /* I-R */
 133         83 ,84 ,85 ,86 ,87 ,88 ,89 ,90 ,97 ,98 , /* S-Z , a-b */
 134         99 ,100,101,102,103,104,105,106,107,108, /* c-l */
 135         109,110,111,112,113,114,115,116,117,118, /* m-v */
 136         119,120,121,122,160,161,162,163,164,165, /* w-z, latin1 */
 137         166,167,168,169,170,171,172,173,174,175, /* latin1 */
 138         176,177,178,179,180,181,182,183,184,185, /* latin1 */
 139         186,187,188,189,190,191,192,193,194,195, /* latin1 */
 140         196,197,198,199,200,201,202,203,204,205, /* latin1 */
 141         206,207,208,209,210,211,212,213,214,215, /* latin1 */
 142         216,217,218,219,220,221,222,223,224,225, /* latin1 */
 143         226,227,228,229,230,231,232,233,234,235, /* latin1 */
 144         236,237,238,239,240,241,242,243,244,245, /* latin1 */
 145         246,247,248,249,250,251,252,253,254,255, /* latin1 */
 146         '\0'
 147 };
 148
 149
 150 /*
 151  * base160()
 152  *
 153  * Convert an unsigned long integer into a base160 representation of the
 154  * number.
 155  *
 156  * Parameters:
 157  *   val --
 158  *     value to be converted
 159  *
 160  *   result --
 161  *     character array, 5 bytes long, into which the base160 representation
 162  *     will be placed.  The result will be a four-digit representation of the
 163  *     number (with leading zeros prepended as necessary), and null
 164  *     terminated.
 165  *
 166  * Returns:
 167  *   Nothing
 168  */
 169 static void
 170 base160_sql(sqlite3_context * hContext,
 171             int argc,
 172             sqlite3_value ** argv)
 173 {
 174     int             i;
 175     long long       val;
 176     char            result[5];
 177
 178     val = sqlite3_value_int64(argv[0]);
 179
 180     for (i = 3; i >= 0; i--) {
 181
 182         result[i] = base160tab[val % 160];
 183         val /= 160;
 184     }
 185
 186     result[4] = '\0';
 187
 188     sqlite3_result_text(hContext, result, -1, SQLITE_TRANSIENT);
 189 }
 190
 191
 192 /*
 193  * base160next_sql()
 194  *
 195  * This function enhances sqlite by adding a "base160_next()" function which is
 196  * accessible via queries.
 197  *
 198  * Retrieve the next-greater number in the base160 sequence for the terminal
 199  * tree node (the last four digits).  Only one tree level (four digits) is
 200  * operated on.
 201  *
 202  * Input:
 203  *   A character string: either an empty string (in which case no operation is
 204  *   performed), or a string of base160 digits with a length of a multiple of
 205  *   four digits.
 206  *
 207  * Output:
 208  *   Upon return, the trailing four digits (one tree level) will have been
 209  *   incremented by 1.
 210  */
 211 static void
 212 base160next_sql(sqlite3_context * hContext,
 213                 int argc,
 214                 sqlite3_value ** argv)
 215 {
 216         int                         i;
 217         int                         len;
 218         char *             pTab;
 219         char *             pBase160 = strdup((const char *)sqlite3_value_text(argv[0]));
 220         char *             pStart = pBase160;
 221
 222         /*
 223          * We need a minimum of four digits, and we will always get a multiple
 224          * of four digits.
 225          */
 226         if (pBase160 != NULL &&
 227             (len = strlen(pBase160)) >= 4 &&
 228             len % 4 == 0) {
 229
 230                 if (pBase160 == NULL) {
 231
 232                         sqlite3_result_null(hContext);
 233                         return;
 234                 }
 235
 236                 pBase160 += strlen(pBase160) - 1;
 237
 238                 /* We only carry through four digits: one level in the tree */
 239                 for (i = 0; i < 4; i++) {
 240
 241                         /* What base160 value does this digit have? */
 242                         pTab = strchr(base160tab, *pBase160);
 243
 244                         /* Is there a carry? */
 245                         if (pTab < base160tab + sizeof(base160tab) - 1) {
 246
 247                                 /*
 248                                  * Nope.  Just increment this value and we're
 249                                  * done.
 250                                  */
 251                                 *pBase160 = *++pTab;
 252                                 break;
 253                         } else {
 254
 255                                 /*
 256                                  * There's a carry.  This value gets
 257                                  * base160tab[0], we decrement the buffer
 258                                  * pointer to get the next higher-order digit,
 259                                  * and continue in the loop.
 260                                  */
 261                                 *pBase160-- = base160tab[0];
 262                         }
 263                 }
 264
 265                 sqlite3_result_text(hContext,
 266                                     pStart,
 267                                     strlen(pStart),
 268                                     free);
 269         } else {
 270                 sqlite3_result_value(hContext, argv[0]);
 271                 if (pBase160 != NULL) {
 272                         free(pBase160);
 273                 }
 274         }
 275 }
 276
 277 static char *parsetree_to_sql(struct ldb_module *module,
 278                               void *mem_ctx,
 279                               const struct ldb_parse_tree *t)
 280 {
 281         const struct ldb_attrib_handler *h;
 282         struct ldb_val value, subval;
 283         char *wild_card_string;
 284         char *child, *tmp;
 285         char *ret = NULL;
 286         char *attr;
 287         int i;
 288
 289
 290         switch(t->operation) {
 291         case LDB_OP_AND:
 292
 293                 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
 294                 if (tmp == NULL) return NULL;
 295
 296                 for (i = 1; i < t->u.list.num_elements; i++) {
 297
 298                         child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
 299                         if (child == NULL) return NULL;
 300
 301                         tmp = talloc_asprintf_append(tmp, " INTERSECT %s ", child);
 302                         if (tmp == NULL) return NULL;
 303                 }
 304
 305                 ret = talloc_asprintf(mem_ctx, "SELECT * FROM ( %s )\n", tmp);
 306
 307                 return ret;
 308
 309         case LDB_OP_OR:
 310
 311                 tmp = parsetree_to_sql(module, mem_ctx, t->u.list.elements[0]);
 312                 if (tmp == NULL) return NULL;
 313
 314                 for (i = 1; i < t->u.list.num_elements; i++) {
 315
 316                         child = parsetree_to_sql(module, mem_ctx, t->u.list.elements[i]);
 317                         if (child == NULL) return NULL;
 318
 319                         tmp = talloc_asprintf_append(tmp, " UNION %s ", child);
 320                         if (tmp == NULL) return NULL;
 321                 }
 322
 323                 return talloc_asprintf(mem_ctx, "SELECT * FROM ( %s ) ", tmp);
 324
 325         case LDB_OP_NOT:
 326
 327                 child = parsetree_to_sql(module, mem_ctx, t->u.isnot.child);
 328                 if (child == NULL) return NULL;
 329
 330                 return talloc_asprintf(mem_ctx,
 331                                         "SELECT eid FROM ldb_entry "
 332                                         "WHERE eid NOT IN ( %s ) ", child);
 333
 334         case LDB_OP_EQUALITY:
 335                 /*
 336                  * For simple searches, we want to retrieve the list of EIDs that
 337                  * match the criteria.
 338                 */
 339                 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
 340                 if (attr == NULL) return NULL;
 341                 h = ldb_attrib_handler(module->ldb, attr);
 342
 343                 /* Get a canonicalised copy of the data */
 344                 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
 345                 if (value.data == NULL) {
 346                         return NULL;
 347                 }
 348
 349                 if (strcasecmp(t->u.equality.attr, "objectclass") == 0) {
 350                 /*
 351                  * For object classes, we want to search for all objectclasses
 352                  * that are subclasses as well.
 353                 */
 354                         return lsqlite3_tprintf(mem_ctx,
 355                                         "SELECT eid  FROM ldb_attribute_values\n"
 356                                         "WHERE norm_attr_name = 'OBJECTCLASS' "
 357                                         "AND norm_attr_value IN\n"
 358                                         "  (SELECT class_name FROM ldb_object_classes\n"
 359                                         "   WHERE tree_key GLOB\n"
 360                                         "     (SELECT tree_key FROM ldb_object_classes\n"
 361                                         "      WHERE class_name = '%q'\n"
 362                                         "     ) || '*'\n"
 363                                         "  )\n", value.data);
 364
 365                 } else if (strcasecmp(t->u.equality.attr, "dn") == 0) {
 366                         /* DN query is a special ldb case */
 367                         char *cdn = ldb_dn_linearize_casefold(module->ldb,
 368                                                               ldb_dn_explode(module->ldb,
 369                                                               (const char *)value.data));
 370
 371                         return lsqlite3_tprintf(mem_ctx,
 372                                                 "SELECT eid FROM ldb_entry "
 373                                                 "WHERE norm_dn = '%q'", cdn);
 374
 375                 } else {
 376                         /* A normal query. */
 377                         return lsqlite3_tprintf(mem_ctx,
 378                                                 "SELECT eid FROM ldb_attribute_values "
 379                                                 "WHERE norm_attr_name = '%q' "
 380                                                 "AND norm_attr_value = '%q'",
 381                                                 attr,
 382                                                 value.data);
 383
 384                 }
 385
 386         case LDB_OP_SUBSTRING:
 387
 388                 wild_card_string = talloc_strdup(mem_ctx,
 389                                         (t->u.substring.start_with_wildcard)?"*":"");
 390                 if (wild_card_string == NULL) return NULL;
 391
 392                 for (i = 0; t->u.substring.chunks[i]; i++) {
 393                         wild_card_string = talloc_asprintf_append(wild_card_string, "%s*",
 394                                                         t->u.substring.chunks[i]->data);
 395                         if (wild_card_string == NULL) return NULL;
 396                 }
 397
 398                 if ( ! t->u.substring.end_with_wildcard ) {
 399                         /* remove last wildcard */
 400                         wild_card_string[strlen(wild_card_string) - 1] = '\0';
 401                 }
 402
 403                 attr = ldb_attr_casefold(mem_ctx, t->u.substring.attr);
 404                 if (attr == NULL) return NULL;
 405                 h = ldb_attrib_handler(module->ldb, attr);
 406
 407                 subval.data = (void *)wild_card_string;
 408                 subval.length = strlen(wild_card_string) + 1;
 409
 410                 /* Get a canonicalised copy of the data */
 411                 h->canonicalise_fn(module->ldb, mem_ctx, &(subval), &value);
 412                 if (value.data == NULL) {
 413                         return NULL;
 414                 }
 415
 416                 return lsqlite3_tprintf(mem_ctx,
 417                                         "SELECT eid FROM ldb_attribute_values "
 418                                         "WHERE norm_attr_name = '%q' "
 419                                         "AND norm_attr_value GLOB '%q'",
 420                                         attr,
 421                                         value.data);
 422
 423         case LDB_OP_GREATER:
 424                 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
 425                 if (attr == NULL) return NULL;
 426                 h = ldb_attrib_handler(module->ldb, attr);
 427
 428                 /* Get a canonicalised copy of the data */
 429                 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
 430                 if (value.data == NULL) {
 431                         return NULL;
 432                 }
 433
 434                 return lsqlite3_tprintf(mem_ctx,
 435                                         "SELECT eid FROM ldb_attribute_values "
 436                                         "WHERE norm_attr_name = '%q' "
 437                                         "AND ldap_compare(norm_attr_value, '>=', '%q', '%q') ",
 438                                         attr,
 439                                         value.data,
 440                                         attr);
 441
 442         case LDB_OP_LESS:
 443                 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
 444                 if (attr == NULL) return NULL;
 445                 h = ldb_attrib_handler(module->ldb, attr);
 446
 447                 /* Get a canonicalised copy of the data */
 448                 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
 449                 if (value.data == NULL) {
 450                         return NULL;
 451                 }
 452
 453                 return lsqlite3_tprintf(mem_ctx,
 454                                         "SELECT eid FROM ldb_attribute_values "
 455                                         "WHERE norm_attr_name = '%q' "
 456                                         "AND ldap_compare(norm_attr_value, '<=', '%q', '%q') ",
 457                                         attr,
 458                                         value.data,
 459                                         attr);
 460
 461         case LDB_OP_PRESENT:
 462                 if (strcasecmp(t->u.present.attr, "dn") == 0) {
 463                         return talloc_strdup(mem_ctx, "SELECT eid FROM ldb_entry");
 464                 }
 465
 466                 attr = ldb_attr_casefold(mem_ctx, t->u.present.attr);
 467                 if (attr == NULL) return NULL;
 468
 469                 return lsqlite3_tprintf(mem_ctx,
 470                                         "SELECT eid FROM ldb_attribute_values "
 471                                         "WHERE norm_attr_name = '%q' ",
 472                                         attr);
 473
 474         case LDB_OP_APPROX:
 475                 attr = ldb_attr_casefold(mem_ctx, t->u.equality.attr);
 476                 if (attr == NULL) return NULL;
 477                 h = ldb_attrib_handler(module->ldb, attr);
 478
 479                 /* Get a canonicalised copy of the data */
 480                 h->canonicalise_fn(module->ldb, mem_ctx, &(t->u.equality.value), &value);
 481                 if (value.data == NULL) {
 482                         return NULL;
 483                 }
 484
 485                 return lsqlite3_tprintf(mem_ctx,
 486                                         "SELECT eid FROM ldb_attribute_values "
 487                                         "WHERE norm_attr_name = '%q' "
 488                                         "AND ldap_compare(norm_attr_value, '~%', 'q', '%q') ",
 489                                         attr,
 490                                         value.data,
 491                                         attr);
 492
 493         case LDB_OP_EXTENDED:
 494 #warning  "work out how to handle bitops"
 495                 return NULL;
 496
 497         default:
 498                 break;
 499         };
 500
 501         /* should never occur */
 502         abort();
 503         return NULL;
 504 }
 505
 506 /*
 507  * query_int()
 508  *
 509  * This function is used for the common case of queries that return a single
 510  * integer value.
 511  *
 512  * NOTE: If more than one value is returned by the query, all but the first
 513  * one will be ignored.
 514  */
 515 static int
 516 query_int(const struct lsqlite3_private * lsqlite3,
 517           long long * pRet,
 518           const char * pSql,
 519           ...)
 520 {
 521         int             ret;
 522         int             bLoop;
 523         char *          p;
 524         sqlite3_stmt *  pStmt;
 525         va_list         args;
 526
 527         /* Begin access to variable argument list */
 528         va_start(args, pSql);
 529
 530         /* Format the query */
 531         if ((p = sqlite3_vmprintf(pSql, args)) == NULL) {
 532                 return SQLITE_NOMEM;
 533         }
 534
 535         /*
 536          * Prepare and execute the SQL statement.  Loop allows retrying on
 537          * certain errors, e.g. SQLITE_SCHEMA occurs if the schema changes,
 538          * requiring retrying the operation.
 539          */
 540         for (bLoop = TRUE; bLoop; ) {
 541
 542                 /* Compile the SQL statement into sqlite virtual machine */
 543                 if ((ret = sqlite3_prepare(lsqlite3->sqlite,
 544                                            p,
 545                                            -1,
 546                                            &pStmt,
 547                                            NULL)) == SQLITE_SCHEMA) {
 548                         if (stmtGetEID != NULL) {
 549                                 sqlite3_finalize(stmtGetEID);
 550                                 stmtGetEID = NULL;
 551                         }
 552                         continue;
 553                 } else if (ret != SQLITE_OK) {
 554                         break;
 555                 }
 556
 557                 /* One row expected */
 558                 if ((ret = sqlite3_step(pStmt)) == SQLITE_SCHEMA) {
 559                         if (stmtGetEID != NULL) {
 560                                 sqlite3_finalize(stmtGetEID);
 561                                 stmtGetEID = NULL;
 562                         }
 563                         (void) sqlite3_finalize(pStmt);
 564                         continue;
 565                 } else if (ret != SQLITE_ROW) {
 566                         (void) sqlite3_finalize(pStmt);
 567                         break;
 568                 }
 569
 570                 /* Get the value to be returned */
 571                 *pRet = sqlite3_column_int64(pStmt, 0);
 572
 573                 /* Free the virtual machine */
 574                 if ((ret = sqlite3_finalize(pStmt)) == SQLITE_SCHEMA) {
 575                         if (stmtGetEID != NULL) {
 576                                 sqlite3_finalize(stmtGetEID);
 577                                 stmtGetEID = NULL;
 578                         }
 579                         continue;
 580                 } else if (ret != SQLITE_OK) {
 581                         (void) sqlite3_finalize(pStmt);
 582                         break;
 583                 }
 584
 585                 /*
 586                  * Normal condition is only one time through loop.  Loop is
 587                  * rerun in error conditions, via "continue", above.
 588                  */
 589                 bLoop = FALSE;
 590         }
 591
 592         /* All done with variable argument list */
 593         va_end(args);
 594
 595
 596         /* Free the memory we allocated for our query string */
 597         sqlite3_free(p);
 598
 599         return ret;
 600 }
 601
 602 /*
 603  * This is a bad hack to support ldap style comparisons whithin sqlite.
 604  * val is the attribute in the row currently under test
 605  * func is the desired test "<=" ">=" "~" ":"
 606  * cmp is the value to compare against (eg: "test")
 607  * attr is the attribute name the value of which we want to test
 608  */
 609
 610 static void lsqlite3_compare(sqlite3_context *ctx, int argc,
 611                                         sqlite3_value **argv)
 612 {
 613         struct ldb_context *ldb = (struct ldb_context *)sqlite3_user_data(ctx);
 614         const char *val = (const char *)sqlite3_value_text(argv[0]);
 615         const char *func = (const char *)sqlite3_value_text(argv[1]);
 616         const char *cmp = (const char *)sqlite3_value_text(argv[2]);
 617         const char *attr = (const char *)sqlite3_value_text(argv[3]);
 618         const struct ldb_attrib_handler *h;
 619         struct ldb_val valX;
 620         struct ldb_val valY;
 621         int ret;
 622
 623         switch (func[0]) {
 624         /* greater */
 625         case '>': /* >= */
 626                 h = ldb_attrib_handler(ldb, attr);
 627                 valX.data = (void *)cmp;
 628                 valX.length = strlen(cmp);
 629                 valY.data = (void *)val;
 630                 valY.length = strlen(val);
 631                 ret = h->comparison_fn(ldb, ldb, &valY, &valX);
 632                 if (ret >= 0)
 633                         sqlite3_result_int(ctx, 1);
 634                 else
 635                         sqlite3_result_int(ctx, 0);
 636                 return;
 637
 638         /* lesser */
 639         case '<': /* <= */
 640                 h = ldb_attrib_handler(ldb, attr);
 641                 valX.data = (void *)cmp;
 642                 valX.length = strlen(cmp);
 643                 valY.data = (void *)val;
 644                 valY.length = strlen(val);
 645                 ret = h->comparison_fn(ldb, ldb, &valY, &valX);
 646                 if (ret <= 0)
 647                         sqlite3_result_int(ctx, 1);
 648                 else
 649                         sqlite3_result_int(ctx, 0);
 650                 return;
 651
 652         /* approx */
 653         case '~':
 654                 /* TODO */
 655                 sqlite3_result_int(ctx, 0);
 656                 return;
 657
 658         /* bitops */
 659         case ':':
 660                 /* TODO */
 661                 sqlite3_result_int(ctx, 0);
 662                 return;
 663
 664         default:
 665                 break;
 666         }
 667
 668         sqlite3_result_error(ctx, "Value must start with a special operation char (<>~:)!", -1);
 669         return;
 670 }
 671
 672
 673 /* rename a record */
 674 static int lsqlite3_safe_rollback(sqlite3 *sqlite)
 675 {
 676         char *errmsg;
 677         int ret;
 678
 679         /* execute */
 680         ret = sqlite3_exec(sqlite, "ROLLBACK;", NULL, NULL, &errmsg);
 681         if (ret != SQLITE_OK) {
 682                 if (errmsg) {
 683                         printf("lsqlite3_safe_rollback: Error: %s\n", errmsg);
 684                         free(errmsg);
 685                 }
 686                 return -1;
 687         }
 688
 689         return 0;
 690 }
 691
 692 /* return an eid as result */
 693 static int lsqlite3_eid_callback(void *result, int col_num, char **cols, char **names)
 694 {
 695         long long *eid = (long long *)result;
 696
 697         if (col_num != 1) return SQLITE_ABORT;
 698         if (strcasecmp(names[0], "eid") != 0) return SQLITE_ABORT;
 699
 700         *eid = atoll(cols[0]);
 701         return SQLITE_OK;
 702 }
 703
 704 /*
 705  * add a single set of ldap message values to a ldb_message
 706  */
 707 static int lsqlite3_search_callback(void *result, int col_num, char **cols, char **names)
 708 {
 709         struct ldb_async_handle *handle = talloc_get_type(result, struct ldb_async_handle);
 710         struct lsql_async_context *ac = talloc_get_type(handle->private_data, struct lsql_async_context);
 711         struct ldb_message *msg;
 712         long long eid;
 713         int i;
 714
 715         /* eid, dn, attr_name, attr_value */
 716         if (col_num != 4)
 717                 return SQLITE_ABORT;
 718
 719         eid = atoll(cols[0]);
 720
 721         if (eid != ac->current_eid) { /* here begin a new entry */
 722
 723                 /* call the async callback for the last entry
 724                  * except the first time */
 725                 if (ac->current_eid != 0) {
 726                         ac->ares->message = ldb_msg_canonicalize(ac->module->ldb, ac->ares->message);
 727                         if (ac->ares->message == NULL)
 728                                 return SQLITE_ABORT;
 729
 730                         handle->status = ac->callback(ac->module->ldb, ac->context, ac->ares);
 731                         if (handle->status != LDB_SUCCESS)
 732                                 return SQLITE_ABORT;
 733                 }
 734
 735                 /* start over */
 736                 ac->ares = talloc_zero(ac, struct ldb_async_result);
 737                 if (!ac->ares)
 738                         return SQLITE_ABORT;
 739
 740                 ac->ares->message = ldb_msg_new(ac->ares);
 741                 if (!ac->ares->message)
 742                         return SQLITE_ABORT;
 743
 744                 ac->ares->type = LDB_REPLY_ENTRY;
 745                 ac->current_eid = eid;
 746         }
 747
 748         msg = ac->ares->message;
 749
 750         if (msg->dn == NULL) {
 751                 msg->dn = ldb_dn_explode(msg, cols[1]);
 752                 if (msg->dn == NULL)
 753                         return SQLITE_ABORT;
 754         }
 755
 756         if (ac->attrs) {
 757                 int found = 0;
 758                 for (i = 0; ac->attrs[i]; i++) {
 759                         if (strcasecmp(cols[2], ac->attrs[i]) == 0) {
 760                                 found = 1;
 761                                 break;
 762                         }
 763                 }
 764                 if (!found) return SQLITE_OK;
 765         }
 766
 767         if (ldb_msg_add_string(msg, cols[2], cols[3]) != 0) {
 768                 return SQLITE_ABORT;
 769         }
 770
 771         return SQLITE_OK;
 772 }
 773
 774
 775 /*
 776  * lsqlite3_get_eid()
 777  * lsqlite3_get_eid_ndn()
 778  *
 779  * These functions are used for the very common case of retrieving an EID value
 780  * given a (normalized) DN.
 781  */
 782
 783 static long long lsqlite3_get_eid_ndn(sqlite3 *sqlite, void *mem_ctx, const char *norm_dn)
 784 {
 785         char *errmsg;
 786         char *query;
 787         long long eid = -1;
 788         long long ret;
 789
 790         /* get object eid */
 791         query = lsqlite3_tprintf(mem_ctx, "SELECT eid "
 792                                           "FROM ldb_entry "
 793                                           "WHERE norm_dn = '%q';", norm_dn);
 794         if (query == NULL) return -1;
 795
 796         ret = sqlite3_exec(sqlite, query, lsqlite3_eid_callback, &eid, &errmsg);
 797         if (ret != SQLITE_OK) {
 798                 if (errmsg) {
 799                         printf("lsqlite3_get_eid: Fatal Error: %s\n", errmsg);
 800                         free(errmsg);
 801                 }
 802                 return -1;
 803         }
 804
 805         return eid;
 806 }
 807
 808 static long long lsqlite3_get_eid(struct ldb_module *module, const struct ldb_dn *dn)
 809 {
 810         TALLOC_CTX *local_ctx;
 811         struct lsqlite3_private *lsqlite3 = module->private_data;
 812         long long eid = -1;
 813         char *cdn;
 814
 815         /* ignore ltdb specials */
 816         if (ldb_dn_is_special(dn)) {
 817                 return -1;
 818         }
 819
 820         /* create a local ctx */
 821         local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_get_eid local context");
 822         if (local_ctx == NULL) {
 823                 return -1;
 824         }
 825
 826         cdn = ldb_dn_linearize(local_ctx, ldb_dn_casefold(module->ldb, dn));
 827         if (!cdn) goto done;
 828
 829         eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, local_ctx, cdn);
 830
 831 done:
 832         talloc_free(local_ctx);
 833         return eid;
 834 }
 835
 836 /*
 837  * Interface functions referenced by lsqlite3_ops
 838  */
 839
 840 static int lsql_search_sync_callback(struct ldb_context *ldb, void *context, struct ldb_async_result *ares)
 841 {
 842         struct ldb_result *res = NULL;
 843
 844         if (!context) {
 845                 ldb_set_errstring(ldb, talloc_strdup(ldb, "NULL Context in callback"));
 846                 goto error;
 847         }
 848
 849         res = *((struct ldb_result **)context);
 850
 851         if (!res || !ares) {
 852                 goto error;
 853         }
 854
 855         if (ares->type == LDB_REPLY_ENTRY) {
 856                 res->msgs = talloc_realloc(res, res->msgs, struct ldb_message *, res->count + 2);
 857                 if (! res->msgs) {
 858                         goto error;
 859                 }
 860
 861                 res->msgs[res->count + 1] = NULL;
 862
 863                 res->msgs[res->count] = talloc_steal(res->msgs, ares->message);
 864                 if (! res->msgs[res->count]) {
 865                         goto error;
 866                 }
 867
 868                 res->count++;
 869         } else {
 870                 ldb_debug(ldb, LDB_DEBUG_ERROR, "unrecognized async reply in ltdb_search_sync_callback!\n");
 871                 goto error;
 872         }
 873
 874         talloc_free(ares);
 875         return LDB_SUCCESS;
 876
 877 error:
 878         if (ares) talloc_free(ares);
 879         if (res) talloc_free(res);
 880         if (context) *((struct ldb_result **)context) = NULL;
 881         return LDB_ERR_OPERATIONS_ERROR;
 882 }
 883
 884 /* search for matching records, by tree */
 885 int lsql_search_async(struct ldb_module *module, const struct ldb_dn *base,
 886                       enum ldb_scope scope, struct ldb_parse_tree *tree,
 887                       const char * const *attrs,
 888                       void *context,
 889                       int (*callback)(struct ldb_context *, void *, struct ldb_async_result *),
 890                       struct ldb_async_handle **handle)
 891 {
 892         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
 893         struct lsql_async_context *lsql_ac;
 894         char *norm_basedn;
 895         char *sqlfilter;
 896         char *errmsg;
 897         char *query = NULL;
 898         int ret;
 899
 900         *handle = init_lsql_handle(lsqlite3, module, context, callback);
 901         if (*handle == NULL) {
 902                 talloc_free(*handle);
 903                 return LDB_ERR_OPERATIONS_ERROR;
 904         }
 905
 906         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_async_context);
 907
 908         if (base) {
 909                 norm_basedn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, base));
 910                 if (norm_basedn == NULL) {
 911                         ret = LDB_ERR_INVALID_DN_SYNTAX;
 912                         goto failed;
 913                 }
 914         } else norm_basedn = talloc_strdup(lsql_ac, "");
 915
 916         if (*norm_basedn == '\0' &&
 917                 (scope == LDB_SCOPE_BASE || scope == LDB_SCOPE_ONELEVEL)) {
 918                         ret = LDB_ERR_UNWILLING_TO_PERFORM;
 919                         goto failed;
 920                 }
 921
 922         /* Convert filter into a series of SQL conditions (constraints) */
 923         sqlfilter = parsetree_to_sql(module, lsql_ac, tree);
 924
 925         switch(scope) {
 926         case LDB_SCOPE_DEFAULT:
 927         case LDB_SCOPE_SUBTREE:
 928                 if (*norm_basedn != '\0') {
 929                         query = lsqlite3_tprintf(lsql_ac,
 930                                 "SELECT entry.eid,\n"
 931                                 "       entry.dn,\n"
 932                                 "       av.attr_name,\n"
 933                                 "       av.attr_value\n"
 934                                 "  FROM ldb_entry AS entry\n"
 935
 936                                 "  LEFT OUTER JOIN ldb_attribute_values AS av\n"
 937                                 "    ON av.eid = entry.eid\n"
 938
 939                                 "  WHERE entry.eid IN\n"
 940                                 "    (SELECT DISTINCT ldb_entry.eid\n"
 941                                 "       FROM ldb_entry\n"
 942                                 "       WHERE (ldb_entry.norm_dn GLOB('*,%q')\n"
 943                                 "       OR ldb_entry.norm_dn = '%q')\n"
 944                                 "       AND ldb_entry.eid IN\n"
 945                                 "         (%s)\n"
 946                                 "    )\n"
 947
 948                                 "  ORDER BY entry.eid ASC;",
 949                                 norm_basedn,
 950                                 norm_basedn,
 951                                 sqlfilter);
 952                 } else {
 953                         query = lsqlite3_tprintf(lsql_ac,
 954                                 "SELECT entry.eid,\n"
 955                                 "       entry.dn,\n"
 956                                 "       av.attr_name,\n"
 957                                 "       av.attr_value\n"
 958                                 "  FROM ldb_entry AS entry\n"
 959
 960                                 "  LEFT OUTER JOIN ldb_attribute_values AS av\n"
 961                                 "    ON av.eid = entry.eid\n"
 962
 963                                 "  WHERE entry.eid IN\n"
 964                                 "    (SELECT DISTINCT ldb_entry.eid\n"
 965                                 "       FROM ldb_entry\n"
 966                                 "       WHERE ldb_entry.eid IN\n"
 967                                 "         (%s)\n"
 968                                 "    )\n"
 969
 970                                 "  ORDER BY entry.eid ASC;",
 971                                 sqlfilter);
 972                 }
 973
 974                 break;
 975
 976         case LDB_SCOPE_BASE:
 977                 query = lsqlite3_tprintf(lsql_ac,
 978                         "SELECT entry.eid,\n"
 979                         "       entry.dn,\n"
 980                         "       av.attr_name,\n"
 981                         "       av.attr_value\n"
 982                         "  FROM ldb_entry AS entry\n"
 983
 984                         "  LEFT OUTER JOIN ldb_attribute_values AS av\n"
 985                         "    ON av.eid = entry.eid\n"
 986
 987                         "  WHERE entry.eid IN\n"
 988                         "    (SELECT DISTINCT ldb_entry.eid\n"
 989                         "       FROM ldb_entry\n"
 990                         "       WHERE ldb_entry.norm_dn = '%q'\n"
 991                         "         AND ldb_entry.eid IN\n"
 992                         "           (%s)\n"
 993                         "    )\n"
 994
 995                         "  ORDER BY entry.eid ASC;",
 996                         norm_basedn,
 997                         sqlfilter);
 998                 break;
 999
1000         case LDB_SCOPE_ONELEVEL:
1001                 query = lsqlite3_tprintf(lsql_ac,
1002                         "SELECT entry.eid,\n"
1003                         "       entry.dn,\n"
1004                         "       av.attr_name,\n"
1005                         "       av.attr_value\n"
1006                         "  FROM ldb_entry AS entry\n"
1007
1008                         "  LEFT OUTER JOIN ldb_attribute_values AS av\n"
1009                         "    ON av.eid = entry.eid\n"
1010
1011                         "  WHERE entry.eid IN\n"
1012                         "    (SELECT DISTINCT ldb_entry.eid\n"
1013                         "       FROM ldb_entry\n"
1014                         "       WHERE norm_dn GLOB('*,%q')\n"
1015                         "         AND NOT norm_dn GLOB('*,*,%q')\n"
1016                         "         AND ldb_entry.eid IN\n(%s)\n"
1017                         "    )\n"
1018
1019                         "  ORDER BY entry.eid ASC;",
1020                         norm_basedn,
1021                         norm_basedn,
1022                         sqlfilter);
1023                 break;
1024         }
1025
1026         if (query == NULL) {
1027                 goto failed;
1028         }
1029
1030         /* * /
1031         printf ("%s\n", query);
1032         / * */
1033
1034         lsql_ac->current_eid = 0;
1035         lsql_ac->attrs = attrs;
1036         lsql_ac->ares = NULL;
1037
1038         (*handle)->state = LDB_ASYNC_PENDING;
1039
1040         ret = sqlite3_exec(lsqlite3->sqlite, query, lsqlite3_search_callback, *handle, &errmsg);
1041         if (ret != SQLITE_OK) {
1042                 if (errmsg) {
1043                         ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1044                         free(errmsg);
1045                 }
1046                 goto failed;
1047         }
1048
1049         /* complete the last message if any */
1050         if (lsql_ac->ares) {
1051                 lsql_ac->ares->message = ldb_msg_canonicalize(module->ldb, lsql_ac->ares->message);
1052                 if (lsql_ac->ares->message == NULL)
1053                         goto failed;
1054
1055                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, lsql_ac->ares);
1056                 if ((*handle)->status != LDB_SUCCESS)
1057                         goto failed;
1058         }
1059
1060         (*handle)->state = LDB_ASYNC_DONE;
1061
1062         return LDB_SUCCESS;
1063
1064 failed:
1065         talloc_free(*handle);
1066         return LDB_ERR_OPERATIONS_ERROR;
1067 }
1068
1069 static int lsql_search_bytree(struct ldb_module * module, const struct ldb_dn* base,
1070                               enum ldb_scope scope, struct ldb_parse_tree * tree,
1071                               const char * const * attrs, struct ldb_result ** res)
1072 {
1073         struct ldb_async_handle *handle;
1074         int ret;
1075
1076         *res = talloc_zero(module, struct ldb_result);
1077         if (! *res) {
1078                 return LDB_ERR_OPERATIONS_ERROR;
1079         }
1080
1081         ret = lsql_search_async(module, base, scope, tree, attrs,
1082                                 res, &lsql_search_sync_callback,
1083                                 &handle);
1084
1085         if (ret == LDB_SUCCESS) {
1086                 ret = ldb_async_wait(module->ldb, handle, LDB_WAIT_ALL);
1087                 talloc_free(handle);
1088         }
1089
1090         if (ret != LDB_SUCCESS) {
1091                 talloc_free(*res);
1092         }
1093
1094         return ret;
1095 }
1096
1097 /* add a record */
1098 static int lsql_add_async(struct ldb_module *module, struct ldb_message *msg,
1099                           void *context,
1100                           int (*callback)(struct ldb_context *, void *, struct ldb_async_result *),
1101                           struct ldb_async_handle **handle)
1102 {
1103         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1104         struct lsql_async_context *lsql_ac;
1105         long long eid;
1106         char *dn, *ndn;
1107         char *errmsg;
1108         char *query;
1109         int i;
1110         int ret = LDB_ERR_OPERATIONS_ERROR;
1111
1112         *handle = init_lsql_handle(lsqlite3, module, context, callback);
1113         if (*handle == NULL) {
1114                 goto failed;
1115         }
1116         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_async_context);
1117         (*handle)->state = LDB_ASYNC_DONE;
1118         (*handle)->status = LDB_SUCCESS;
1119
1120         /* See if this is an ltdb special */
1121         if (ldb_dn_is_special(msg->dn)) {
1122                 struct ldb_dn *c;
1123
1124                 c = ldb_dn_explode(lsql_ac, "@SUBCLASSES");
1125                 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1126 #warning "insert subclasses into object class tree"
1127                         ret = LDB_ERR_UNWILLING_TO_PERFORM;
1128                         goto failed;
1129                 }
1130
1131 /*
1132                 c = ldb_dn_explode(local_ctx, "@INDEXLIST");
1133                 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1134 #warning "should we handle indexes somehow ?"
1135                         goto failed;
1136                 }
1137 */
1138                 /* Others are implicitly ignored */
1139                 return LDB_SUCCESS;
1140         }
1141
1142         /* create linearized and normalized dns */
1143         dn = ldb_dn_linearize(lsql_ac, msg->dn);
1144         ndn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, msg->dn));
1145         if (dn == NULL || ndn == NULL) {
1146                 ret = LDB_ERR_OTHER;
1147                 goto failed;
1148         }
1149
1150         query = lsqlite3_tprintf(lsql_ac,
1151                                    /* Add new entry */
1152                                    "INSERT OR ABORT INTO ldb_entry "
1153                                    "('dn', 'norm_dn') "
1154                                    "VALUES ('%q', '%q');",
1155                                 dn, ndn);
1156         if (query == NULL) {
1157                 ret = LDB_ERR_OTHER;
1158                 goto failed;
1159         }
1160
1161         ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1162         if (ret != SQLITE_OK) {
1163                 if (errmsg) {
1164                         ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1165                         free(errmsg);
1166                 }
1167                 ret = LDB_ERR_OTHER;
1168                 goto failed;
1169         }
1170
1171         eid = lsqlite3_get_eid_ndn(lsqlite3->sqlite, lsql_ac, ndn);
1172         if (eid == -1) {
1173                 ret = LDB_ERR_OTHER;
1174                 goto failed;
1175         }
1176
1177         for (i = 0; i < msg->num_elements; i++) {
1178                 const struct ldb_message_element *el = &msg->elements[i];
1179                 const struct ldb_attrib_handler *h;
1180                 char *attr;
1181                 int j;
1182
1183                 /* Get a case-folded copy of the attribute name */
1184                 attr = ldb_attr_casefold(lsql_ac, el->name);
1185                 if (attr == NULL) {
1186                         ret = LDB_ERR_OTHER;
1187                         goto failed;
1188                 }
1189
1190                 h = ldb_attrib_handler(module->ldb, el->name);
1191
1192                 /* For each value of the specified attribute name... */
1193                 for (j = 0; j < el->num_values; j++) {
1194                         struct ldb_val value;
1195                         char *insert;
1196
1197                         /* Get a canonicalised copy of the data */
1198                         h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1199                         if (value.data == NULL) {
1200                                 ret = LDB_ERR_OTHER;
1201                                 goto failed;
1202                         }
1203
1204                         insert = lsqlite3_tprintf(lsql_ac,
1205                                         "INSERT OR ROLLBACK INTO ldb_attribute_values "
1206                                         "('eid', 'attr_name', 'norm_attr_name',"
1207                                         " 'attr_value', 'norm_attr_value') "
1208                                         "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1209                                         eid, el->name, attr,
1210                                         el->values[j].data, value.data);
1211                         if (insert == NULL) {
1212                                 ret = LDB_ERR_OTHER;
1213                                 goto failed;
1214                         }
1215
1216                         ret = sqlite3_exec(lsqlite3->sqlite, insert, NULL, NULL, &errmsg);
1217                         if (ret != SQLITE_OK) {
1218                                 if (errmsg) {
1219                                         ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1220                                         free(errmsg);
1221                                 }
1222                                 ret = LDB_ERR_OTHER;
1223                                 goto failed;
1224                         }
1225                 }
1226         }
1227
1228         if (lsql_ac->callback)
1229                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1230
1231         return LDB_SUCCESS;
1232
1233 failed:
1234         talloc_free(*handle);
1235         return ret;
1236 }
1237
1238 static int lsql_add(struct ldb_module *module, const struct ldb_message *msg)
1239 {
1240         struct ldb_async_handle *handle;
1241         int ret;
1242
1243         ret = lsql_add_async(module, msg, NULL, NULL, &handle);
1244
1245         if (ret != LDB_SUCCESS)
1246                 return ret;
1247
1248         ret = ldb_async_wait(module->ldb, handle, LDB_WAIT_ALL);
1249
1250         talloc_free(handle);
1251         return ret;
1252 }
1253
1254
1255 /* modify a record */
1256 static int lsql_modify_async(struct ldb_module *module, const struct ldb_message *msg,
1257                              void *context,
1258                              int (*callback)(struct ldb_context *, void *, struct ldb_async_result *),
1259                              struct ldb_async_handle **handle)
1260 {
1261         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1262         struct lsql_async_context *lsql_ac;
1263         long long eid;
1264         char *errmsg;
1265         int i;
1266         int ret = LDB_ERR_OPERATIONS_ERROR;
1267
1268         *handle = init_lsql_handle(lsqlite3, module, context, callback);
1269         if (*handle == NULL) {
1270                 goto failed;
1271         }
1272         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_async_context);
1273         (*handle)->state = LDB_ASYNC_DONE;
1274         (*handle)->status = LDB_SUCCESS;
1275
1276         /* See if this is an ltdb special */
1277         if (ldb_dn_is_special(msg->dn)) {
1278                 struct ldb_dn *c;
1279
1280                 c = ldb_dn_explode(lsql_ac, "@SUBCLASSES");
1281                 if (ldb_dn_compare(module->ldb, msg->dn, c) == 0) {
1282 #warning "modify subclasses into object class tree"
1283                         ret = LDB_ERR_UNWILLING_TO_PERFORM;
1284                         goto failed;
1285                 }
1286
1287                 /* Others are implicitly ignored */
1288                 return LDB_SUCCESS;
1289         }
1290
1291         eid = lsqlite3_get_eid(module, msg->dn);
1292         if (eid == -1) {
1293                 ret = LDB_ERR_OTHER;
1294                 goto failed;
1295         }
1296
1297         for (i = 0; i < msg->num_elements; i++) {
1298                 const struct ldb_message_element *el = &msg->elements[i];
1299                 const struct ldb_attrib_handler *h;
1300                 int flags = el->flags & LDB_FLAG_MOD_MASK;
1301                 char *attr;
1302                 char *mod;
1303                 int j;
1304
1305                 /* Get a case-folded copy of the attribute name */
1306                 attr = ldb_attr_casefold(lsql_ac, el->name);
1307                 if (attr == NULL) {
1308                         ret = LDB_ERR_OTHER;
1309                         goto failed;
1310                 }
1311
1312                 h = ldb_attrib_handler(module->ldb, el->name);
1313
1314                 switch (flags) {
1315
1316                 case LDB_FLAG_MOD_REPLACE:
1317
1318                         /* remove all attributes before adding the replacements */
1319                         mod = lsqlite3_tprintf(lsql_ac,
1320                                                 "DELETE FROM ldb_attribute_values "
1321                                                 "WHERE eid = '%lld' "
1322                                                 "AND norm_attr_name = '%q';",
1323                                                 eid, attr);
1324                         if (mod == NULL) {
1325                                 ret = LDB_ERR_OTHER;
1326                                 goto failed;
1327                         }
1328
1329                         ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1330                         if (ret != SQLITE_OK) {
1331                                 if (errmsg) {
1332                                         ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1333                                         free(errmsg);
1334                                 }
1335                                 ret = LDB_ERR_OTHER;
1336                                 goto failed;
1337                         }
1338
1339                         /* MISSING break is INTENTIONAL */
1340
1341                 case LDB_FLAG_MOD_ADD:
1342 #warning "We should throw an error if no value is provided!"
1343                         /* For each value of the specified attribute name... */
1344                         for (j = 0; j < el->num_values; j++) {
1345                                 struct ldb_val value;
1346
1347                                 /* Get a canonicalised copy of the data */
1348                                 h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1349                                 if (value.data == NULL) {
1350                                         ret = LDB_ERR_OTHER;
1351                                         goto failed;
1352                                 }
1353
1354                                 mod = lsqlite3_tprintf(lsql_ac,
1355                                         "INSERT OR ROLLBACK INTO ldb_attribute_values "
1356                                         "('eid', 'attr_name', 'norm_attr_name',"
1357                                         " 'attr_value', 'norm_attr_value') "
1358                                         "VALUES ('%lld', '%q', '%q', '%q', '%q');",
1359                                         eid, el->name, attr,
1360                                         el->values[j].data, value.data);
1361
1362                                 if (mod == NULL) {
1363                                         ret = LDB_ERR_OTHER;
1364                                         goto failed;
1365                                 }
1366
1367                                 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1368                                 if (ret != SQLITE_OK) {
1369                                         if (errmsg) {
1370                                                 ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1371                                                 free(errmsg);
1372                                         }
1373                                         ret = LDB_ERR_OTHER;
1374                                         goto failed;
1375                                 }
1376                         }
1377
1378                         break;
1379
1380                 case LDB_FLAG_MOD_DELETE:
1381 #warning "We should throw an error if the attribute we are trying to delete does not exist!"
1382                         if (el->num_values == 0) {
1383                                 mod = lsqlite3_tprintf(lsql_ac,
1384                                                         "DELETE FROM ldb_attribute_values "
1385                                                         "WHERE eid = '%lld' "
1386                                                         "AND norm_attr_name = '%q';",
1387                                                         eid, attr);
1388                                 if (mod == NULL) {
1389                                         ret = LDB_ERR_OTHER;
1390                                         goto failed;
1391                                 }
1392
1393                                 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1394                                 if (ret != SQLITE_OK) {
1395                                         if (errmsg) {
1396                                                 ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1397                                                 free(errmsg);
1398                                         }
1399                                         ret = LDB_ERR_OTHER;
1400                                         goto failed;
1401                                 }
1402                         }
1403
1404                         /* For each value of the specified attribute name... */
1405                         for (j = 0; j < el->num_values; j++) {
1406                                 struct ldb_val value;
1407
1408                                 /* Get a canonicalised copy of the data */
1409                                 h->canonicalise_fn(module->ldb, lsql_ac, &(el->values[j]), &value);
1410                                 if (value.data == NULL) {
1411                                         ret = LDB_ERR_OTHER;
1412                                         goto failed;
1413                                 }
1414
1415                                 mod = lsqlite3_tprintf(lsql_ac,
1416                                         "DELETE FROM ldb_attribute_values "
1417                                         "WHERE eid = '%lld' "
1418                                         "AND norm_attr_name = '%q' "
1419                                         "AND norm_attr_value = '%q';",
1420                                         eid, attr, value.data);
1421
1422                                 if (mod == NULL) {
1423                                         ret = LDB_ERR_OTHER;
1424                                         goto failed;
1425                                 }
1426
1427                                 ret = sqlite3_exec(lsqlite3->sqlite, mod, NULL, NULL, &errmsg);
1428                                 if (ret != SQLITE_OK) {
1429                                         if (errmsg) {
1430                                                 ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1431                                                 free(errmsg);
1432                                         }
1433                                         ret = LDB_ERR_OTHER;
1434                                         goto failed;
1435                                 }
1436                         }
1437
1438                         break;
1439                 }
1440         }
1441
1442         if (lsql_ac->callback)
1443                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1444
1445         return LDB_SUCCESS;
1446
1447 failed:
1448         talloc_free(*handle);
1449         return ret;
1450 }
1451
1452 static int lsql_modify(struct ldb_module *module, const struct ldb_message *msg)
1453 {
1454         struct ldb_async_handle *handle;
1455         int ret;
1456
1457         ret = lsql_modify_async(module, msg, NULL, NULL, &handle);
1458
1459         if (ret != LDB_SUCCESS)
1460                 return ret;
1461
1462         ret = ldb_async_wait(module->ldb, handle, LDB_WAIT_ALL);
1463
1464         talloc_free(handle);
1465         return ret;
1466 }
1467
1468 /* delete a record */
1469 static int lsql_delete_async(struct ldb_module *module, const struct ldb_dn *dn,
1470                              void *context,
1471                              int (*callback)(struct ldb_context *, void *, struct ldb_async_result *),
1472                              struct ldb_async_handle **handle)
1473 {
1474         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1475         struct lsql_async_context *lsql_ac;
1476         long long eid;
1477         char *errmsg;
1478         char *query;
1479         int ret = LDB_ERR_OPERATIONS_ERROR;
1480
1481
1482         *handle = init_lsql_handle(lsqlite3, module, context, callback);
1483         if (*handle == NULL) {
1484                 goto failed;
1485         }
1486         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_async_context);
1487         (*handle)->state = LDB_ASYNC_DONE;
1488         (*handle)->status = LDB_SUCCESS;
1489
1490         eid = lsqlite3_get_eid(module, dn);
1491         if (eid == -1) {
1492                 goto failed;
1493         }
1494
1495         query = lsqlite3_tprintf(lsql_ac,
1496                                    /* Delete entry */
1497                                    "DELETE FROM ldb_entry WHERE eid = %lld; "
1498                                    /* Delete attributes */
1499                                    "DELETE FROM ldb_attribute_values WHERE eid = %lld; ",
1500                                 eid, eid);
1501         if (query == NULL) {
1502                 ret = LDB_ERR_OTHER;
1503                 goto failed;
1504         }
1505
1506         ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1507         if (ret != SQLITE_OK) {
1508                 if (errmsg) {
1509                         ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1510                         free(errmsg);
1511                 }
1512                 ret = LDB_ERR_OPERATIONS_ERROR;
1513                 goto failed;
1514         }
1515
1516         if (lsql_ac->callback)
1517                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1518
1519         return LDB_SUCCESS;
1520
1521 failed:
1522         talloc_free(*handle);
1523         return ret;
1524 }
1525
1526 static int lsql_delete(struct ldb_module *module, const struct ldb_dn *dn)
1527 {
1528         struct ldb_async_handle *handle;
1529         int ret;
1530
1531         /* ignore ltdb specials */
1532         if (ldb_dn_is_special(dn)) {
1533                 return LDB_SUCCESS;
1534         }
1535
1536         ret = lsql_delete_async(module, dn, NULL, NULL, &handle);
1537
1538         if (ret != LDB_SUCCESS)
1539                 return ret;
1540
1541         ret = ldb_async_wait(module->ldb, handle, LDB_WAIT_ALL);
1542
1543         talloc_free(handle);
1544         return ret;
1545 }
1546
1547 /* rename a record */
1548 static int lsql_rename_async(struct ldb_module *module, const struct ldb_dn *olddn, const struct ldb_dn *newdn,
1549                              void *context,
1550                              int (*callback)(struct ldb_context *, void *, struct ldb_async_result *),
1551                              struct ldb_async_handle **handle)
1552 {
1553         struct lsqlite3_private *lsqlite3 = talloc_get_type(module->private_data, struct lsqlite3_private);
1554         struct lsql_async_context *lsql_ac;
1555         char *new_dn, *new_cdn, *old_cdn;
1556         char *errmsg;
1557         char *query;
1558         int ret = LDB_ERR_OPERATIONS_ERROR;
1559
1560         *handle = init_lsql_handle(lsqlite3, module, context, callback);
1561         if (*handle == NULL) {
1562                 goto failed;
1563         }
1564         lsql_ac = talloc_get_type((*handle)->private_data, struct lsql_async_context);
1565         (*handle)->state = LDB_ASYNC_DONE;
1566         (*handle)->status = LDB_SUCCESS;
1567
1568         /* create linearized and normalized dns */
1569         old_cdn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, olddn));
1570         new_cdn = ldb_dn_linearize(lsql_ac, ldb_dn_casefold(module->ldb, newdn));
1571         new_dn = ldb_dn_linearize(lsql_ac, newdn);
1572         if (old_cdn == NULL || new_cdn == NULL || new_dn == NULL) {
1573                 goto failed;
1574         }
1575
1576         /* build the SQL query */
1577         query = lsqlite3_tprintf(lsql_ac,
1578                                  "UPDATE ldb_entry SET dn = '%q', norm_dn = '%q' "
1579                                  "WHERE norm_dn = '%q';",
1580                                  new_dn, new_cdn, old_cdn);
1581         if (query == NULL) {
1582                 goto failed;
1583         }
1584
1585         /* execute */
1586         ret = sqlite3_exec(lsqlite3->sqlite, query, NULL, NULL, &errmsg);
1587         if (ret != SQLITE_OK) {
1588                 if (errmsg) {
1589                         ldb_set_errstring(module->ldb, talloc_strdup(module, errmsg));
1590                         free(errmsg);
1591                 }
1592                 ret = LDB_ERR_OPERATIONS_ERROR;
1593                 goto failed;
1594         }
1595
1596         if (lsql_ac->callback)
1597                 (*handle)->status = lsql_ac->callback(module->ldb, lsql_ac->context, NULL);
1598
1599         return LDB_SUCCESS;
1600
1601 failed:
1602         talloc_free(*handle);
1603         return ret;
1604 }
1605
1606 static int lsql_rename(struct ldb_module *module, const struct ldb_dn *olddn, const struct ldb_dn *newdn)
1607 {
1608         struct ldb_async_handle *handle;
1609         int ret;
1610
1611         /* ignore ltdb specials */
1612         if (ldb_dn_is_special(olddn) || ldb_dn_is_special(newdn)) {
1613                 return LDB_SUCCESS;
1614         }
1615
1616
1617         ret = lsql_rename_async(module, olddn, newdn, NULL, NULL, &handle);
1618
1619         if (ret != LDB_SUCCESS)
1620                 return ret;
1621
1622         ret = ldb_async_wait(module->ldb, handle, LDB_WAIT_ALL);
1623
1624         talloc_free(handle);
1625         return ret;
1626 }
1627
1628 static int lsql_start_trans(struct ldb_module * module)
1629 {
1630         int ret;
1631         char *errmsg;
1632         struct lsqlite3_private *   lsqlite3 = module->private_data;
1633
1634         if (lsqlite3->trans_count == 0) {
1635                 ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN IMMEDIATE;", NULL, NULL, &errmsg);
1636                 if (ret != SQLITE_OK) {
1637                         if (errmsg) {
1638                                 printf("lsqlite3_start_trans: error: %s\n", errmsg);
1639                                 free(errmsg);
1640                         }
1641                         return -1;
1642                 }
1643         };
1644
1645         lsqlite3->trans_count++;
1646
1647         return 0;
1648 }
1649
1650 static int lsql_end_trans(struct ldb_module *module)
1651 {
1652         int ret;
1653         char *errmsg;
1654         struct lsqlite3_private *lsqlite3 = module->private_data;
1655
1656         if (lsqlite3->trans_count > 0) {
1657                 lsqlite3->trans_count--;
1658         } else return -1;
1659
1660         if (lsqlite3->trans_count == 0) {
1661                 ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1662                 if (ret != SQLITE_OK) {
1663                         if (errmsg) {
1664                                 printf("lsqlite3_end_trans: error: %s\n", errmsg);
1665                                 free(errmsg);
1666                         }
1667                         return -1;
1668                 }
1669         }
1670
1671         return 0;
1672 }
1673
1674 static int lsql_del_trans(struct ldb_module *module)
1675 {
1676         struct lsqlite3_private *lsqlite3 = module->private_data;
1677
1678         if (lsqlite3->trans_count > 0) {
1679                 lsqlite3->trans_count--;
1680         } else return -1;
1681
1682         if (lsqlite3->trans_count == 0) {
1683                 return lsqlite3_safe_rollback(lsqlite3->sqlite);
1684         }
1685
1686         return -1;
1687 }
1688
1689 /*
1690  * Static functions
1691  */
1692
1693 static int initialize(struct lsqlite3_private *lsqlite3,
1694                       struct ldb_context *ldb, const char *url, int flags)
1695 {
1696         TALLOC_CTX *local_ctx;
1697         long long queryInt;
1698         int rollback = 0;
1699         char *errmsg;
1700         char *schema;
1701         int ret;
1702
1703         /* create a local ctx */
1704         local_ctx = talloc_named(lsqlite3, 0, "lsqlite3_rename local context");
1705         if (local_ctx == NULL) {
1706                 return -1;
1707         }
1708
1709         schema = lsqlite3_tprintf(local_ctx,
1710
1711
1712                 "CREATE TABLE ldb_info AS "
1713                 "  SELECT 'LDB' AS database_type,"
1714                 "         '1.0' AS version;"
1715
1716                 /*
1717                  * The entry table holds the information about an entry.
1718                  * This table is used to obtain the EID of the entry and to
1719                  * support scope=one and scope=base.  The parent and child
1720                  * table is included in the entry table since all the other
1721                  * attributes are dependent on EID.
1722                  */
1723                 "CREATE TABLE ldb_entry "
1724                 "("
1725                 "  eid     INTEGER PRIMARY KEY AUTOINCREMENT,"
1726                 "  dn      TEXT UNIQUE NOT NULL,"
1727                 "  norm_dn TEXT UNIQUE NOT NULL"
1728                 ");"
1729
1730
1731                 "CREATE TABLE ldb_object_classes"
1732                 "("
1733                 "  class_name            TEXT PRIMARY KEY,"
1734                 "  parent_class_name     TEXT,"
1735                 "  tree_key              TEXT UNIQUE,"
1736                 "  max_child_num         INTEGER DEFAULT 0"
1737                 ");"
1738
1739                 /*
1740                  * We keep a full listing of attribute/value pairs here
1741                  */
1742                 "CREATE TABLE ldb_attribute_values"
1743                 "("
1744                 "  eid             INTEGER REFERENCES ldb_entry,"
1745                 "  attr_name       TEXT,"
1746                 "  norm_attr_name  TEXT,"
1747                 "  attr_value      TEXT,"
1748                 "  norm_attr_value TEXT "
1749                 ");"
1750
1751
1752                 /*
1753                  * Indexes
1754                  */
1755                 "CREATE INDEX ldb_attribute_values_eid_idx "
1756                 "  ON ldb_attribute_values (eid);"
1757
1758                 "CREATE INDEX ldb_attribute_values_name_value_idx "
1759                 "  ON ldb_attribute_values (attr_name, norm_attr_value);"
1760
1761
1762
1763                 /*
1764                  * Triggers
1765                  */
1766
1767                 "CREATE TRIGGER ldb_object_classes_insert_tr"
1768                 "  AFTER INSERT"
1769                 "  ON ldb_object_classes"
1770                 "  FOR EACH ROW"
1771                 "    BEGIN"
1772                 "      UPDATE ldb_object_classes"
1773                 "        SET tree_key = COALESCE(tree_key, "
1774                 "              ("
1775                 "                SELECT tree_key || "
1776                 "                       (SELECT base160(max_child_num + 1)"
1777                 "                                FROM ldb_object_classes"
1778                 "                                WHERE class_name = "
1779                 "                                      new.parent_class_name)"
1780                 "                  FROM ldb_object_classes "
1781                 "                  WHERE class_name = new.parent_class_name "
1782                 "              ));"
1783                 "      UPDATE ldb_object_classes "
1784                 "        SET max_child_num = max_child_num + 1"
1785                 "        WHERE class_name = new.parent_class_name;"
1786                 "    END;"
1787
1788                 /*
1789                  * Table initialization
1790                  */
1791
1792                 "INSERT INTO ldb_object_classes "
1793                 "    (class_name, tree_key) "
1794                 "  VALUES "
1795                 "    ('TOP', '0001');");
1796
1797         /* Skip protocol indicator of url  */
1798         if (strncmp(url, "sqlite://", 9) != 0) {
1799                 return SQLITE_MISUSE;
1800         }
1801
1802         /* Update pointer to just after the protocol indicator */
1803         url += 9;
1804
1805         /* Try to open the (possibly empty/non-existent) database */
1806         if ((ret = sqlite3_open(url, &lsqlite3->sqlite)) != SQLITE_OK) {
1807                 return ret;
1808         }
1809
1810         /* In case this is a new database, enable auto_vacuum */
1811         ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA auto_vacuum = 1;", NULL, NULL, &errmsg);
1812         if (ret != SQLITE_OK) {
1813                 if (errmsg) {
1814                         printf("lsqlite3 initializaion error: %s\n", errmsg);
1815                         free(errmsg);
1816                 }
1817                 goto failed;
1818         }
1819
1820         if (flags & LDB_FLG_NOSYNC) {
1821                 /* DANGEROUS */
1822                 ret = sqlite3_exec(lsqlite3->sqlite, "PRAGMA synchronous = OFF;", NULL, NULL, &errmsg);
1823                 if (ret != SQLITE_OK) {
1824                         if (errmsg) {
1825                                 printf("lsqlite3 initializaion error: %s\n", errmsg);
1826                                 free(errmsg);
1827                         }
1828                         goto failed;
1829                 }
1830         }
1831
1832         /* */
1833
1834         /* Establish a busy timeout of 30 seconds */
1835         if ((ret = sqlite3_busy_timeout(lsqlite3->sqlite,
1836                                         30000)) != SQLITE_OK) {
1837                 return ret;
1838         }
1839
1840         /* Create a function, callable from sql, to increment a tree_key */
1841         if ((ret =
1842              sqlite3_create_function(lsqlite3->sqlite,/* handle */
1843                                      "base160_next",  /* function name */
1844                                      1,               /* number of args */
1845                                      SQLITE_ANY,      /* preferred text type */
1846                                      NULL,            /* user data */
1847                                      base160next_sql, /* called func */
1848                                      NULL,            /* step func */
1849                                      NULL             /* final func */
1850                      )) != SQLITE_OK) {
1851                 return ret;
1852         }
1853
1854         /* Create a function, callable from sql, to convert int to base160 */
1855         if ((ret =
1856              sqlite3_create_function(lsqlite3->sqlite,/* handle */
1857                                      "base160",       /* function name */
1858                                      1,               /* number of args */
1859                                      SQLITE_ANY,      /* preferred text type */
1860                                      NULL,            /* user data */
1861                                      base160_sql,     /* called func */
1862                                      NULL,            /* step func */
1863                                      NULL             /* final func */
1864                      )) != SQLITE_OK) {
1865                 return ret;
1866         }
1867
1868         /* Create a function, callable from sql, to perform various comparisons */
1869         if ((ret =
1870              sqlite3_create_function(lsqlite3->sqlite, /* handle */
1871                                      "ldap_compare",   /* function name */
1872                                      4,                /* number of args */
1873                                      SQLITE_ANY,       /* preferred text type */
1874                                      ldb  ,            /* user data */
1875                                      lsqlite3_compare, /* called func */
1876                                      NULL,             /* step func */
1877                                      NULL              /* final func */
1878                      )) != SQLITE_OK) {
1879                 return ret;
1880         }
1881
1882         /* Begin a transaction */
1883         ret = sqlite3_exec(lsqlite3->sqlite, "BEGIN EXCLUSIVE;", NULL, NULL, &errmsg);
1884         if (ret != SQLITE_OK) {
1885                 if (errmsg) {
1886                         printf("lsqlite3: initialization error: %s\n", errmsg);
1887                         free(errmsg);
1888                 }
1889                 goto failed;
1890         }
1891         rollback = 1;
1892
1893         /* Determine if this is a new database.  No tables means it is. */
1894         if (query_int(lsqlite3,
1895                       &queryInt,
1896                       "SELECT COUNT(*)\n"
1897                       "  FROM sqlite_master\n"
1898                       "  WHERE type = 'table';") != 0) {
1899                 goto failed;
1900         }
1901
1902         if (queryInt == 0) {
1903                 /*
1904                  * Create the database schema
1905                  */
1906                 ret = sqlite3_exec(lsqlite3->sqlite, schema, NULL, NULL, &errmsg);
1907                 if (ret != SQLITE_OK) {
1908                         if (errmsg) {
1909                                 printf("lsqlite3 initializaion error: %s\n", errmsg);
1910                                 free(errmsg);
1911                         }
1912                         goto failed;
1913                 }
1914         } else {
1915                 /*
1916                  * Ensure that the database we opened is one of ours
1917                  */
1918                 if (query_int(lsqlite3,
1919                               &queryInt,
1920                               "SELECT "
1921                               "  (SELECT COUNT(*) = 2"
1922                               "     FROM sqlite_master "
1923                               "     WHERE type = 'table' "
1924                               "       AND name IN "
1925                               "         ("
1926                               "           'ldb_entry', "
1927                               "           'ldb_object_classes' "
1928                               "         ) "
1929                               "  ) "
1930                               "  AND "
1931                               "  (SELECT 1 "
1932                               "     FROM ldb_info "
1933                               "     WHERE database_type = 'LDB' "
1934                               "       AND version = '1.0'"
1935                               "  );") != 0 ||
1936                     queryInt != 1) {
1937
1938                         /* It's not one that we created.  See ya! */
1939                         goto failed;
1940                 }
1941         }
1942
1943         /* Commit the transaction */
1944         ret = sqlite3_exec(lsqlite3->sqlite, "COMMIT;", NULL, NULL, &errmsg);
1945         if (ret != SQLITE_OK) {
1946                 if (errmsg) {
1947                         printf("lsqlite3: iniialization error: %s\n", errmsg);
1948                         free(errmsg);
1949                 }
1950                 goto failed;
1951         }
1952
1953         return SQLITE_OK;
1954
1955 failed:
1956         if (rollback) lsqlite3_safe_rollback(lsqlite3->sqlite);
1957         sqlite3_close(lsqlite3->sqlite);
1958         return -1;
1959 }
1960
1961 static int
1962 destructor(void *p)
1963 {
1964         struct lsqlite3_private *lsqlite3 = p;
1965
1966         if (lsqlite3->sqlite) {
1967                 sqlite3_close(lsqlite3->sqlite);
1968         }
1969         return 0;
1970 }
1971
1972 static int lsql_async_wait(struct ldb_module *module, struct ldb_async_handle *handle, enum ldb_async_wait_type type)
1973 {
1974         return handle->status;
1975 }
1976
1977 static int lsql_request(struct ldb_module *module, struct ldb_request *req)
1978 {
1979         /* check for oustanding critical controls and return an error if found */
1980
1981         if (req->controls != NULL) {
1982                 ldb_debug(module->ldb, LDB_DEBUG_WARNING, "Controls should not reach the ldb_sqlite3 backend!\n");
1983         }
1984
1985         if (check_critical_controls(req->controls)) {
1986                 return LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION;
1987         }
1988
1989         switch (req->operation) {
1990
1991         case LDB_REQ_SEARCH:
1992                 return lsql_search_bytree(module,
1993                                           req->op.search.base,
1994                                           req->op.search.scope,
1995                                           req->op.search.tree,
1996                                           req->op.search.attrs,
1997                                           &req->op.search.res);
1998
1999         case LDB_REQ_ADD:
2000                 return lsql_add(module, req->op.add.message);
2001
2002         case LDB_REQ_MODIFY:
2003                 return lsql_modify(module, req->op.mod.message);
2004
2005         case LDB_REQ_DELETE:
2006                 return lsql_delete(module, req->op.del.dn);
2007
2008         case LDB_REQ_RENAME:
2009                 return lsql_rename(module,
2010                                         req->op.rename.olddn,
2011                                         req->op.rename.newdn);
2012
2013         case LDB_ASYNC_SEARCH:
2014                 return lsql_search_async(module,
2015                                         req->op.search.base,
2016                                         req->op.search.scope,
2017                                         req->op.search.tree,
2018                                         req->op.search.attrs,
2019                                         req->async.context,
2020                                         req->async.callback,
2021                                         &req->async.handle);
2022 /*
2023         case LDB_ASYNC_ADD:
2024                 return lsql_add_async(module,
2025                                         req->op.add.message,
2026                                         req->async.context,
2027                                         req->async.callback,
2028                                         &req->async.handle);
2029
2030         case LDB_ASYNC_MODIFY:
2031                 return lsql_modify_async(module,
2032                                         req->op.mod.message,
2033                                         req->async.context,
2034                                         req->async.callback,
2035                                         &req->async.handle);
2036 */
2037         case LDB_ASYNC_DELETE:
2038                 return lsql_delete_async(module,
2039                                         req->op.del.dn,
2040                                         req->async.context,
2041                                         req->async.callback,
2042                                         &req->async.handle);
2043
2044         case LDB_ASYNC_RENAME:
2045                 return lsql_rename_async(module,
2046                                         req->op.rename.olddn,
2047                                         req->op.rename.newdn,
2048                                         req->async.context,
2049                                         req->async.callback,
2050                                         &req->async.handle);
2051
2052         default:
2053                 return LDB_ERR_OPERATIONS_ERROR;
2054
2055         }
2056 }
2057
2058 /*
2059  * Table of operations for the sqlite3 backend
2060  */
2061 static const struct ldb_module_ops lsqlite3_ops = {
2062         .name              = "sqlite",
2063         .request           = lsql_request,
2064         .start_transaction = lsql_start_trans,
2065         .end_transaction   = lsql_end_trans,
2066         .del_transaction   = lsql_del_trans,
2067         .async_wait        = lsql_async_wait,
2068 };
2069
2070 /*
2071  * connect to the database
2072  */
2073 static int lsqlite3_connect(struct ldb_context *ldb,
2074                      const char *url,
2075                      unsigned int flags,
2076                      const char *options[])
2077 {
2078         int                         i;
2079         int                         ret;
2080         struct lsqlite3_private *   lsqlite3 = NULL;
2081
2082         lsqlite3 = talloc(ldb, struct lsqlite3_private);
2083         if (!lsqlite3) {
2084                 goto failed;
2085         }
2086
2087         lsqlite3->sqlite = NULL;
2088         lsqlite3->options = NULL;
2089         lsqlite3->trans_count = 0;
2090
2091         ret = initialize(lsqlite3, ldb, url, flags);
2092         if (ret != SQLITE_OK) {
2093                 goto failed;
2094         }
2095
2096         talloc_set_destructor(lsqlite3, destructor);
2097
2098         ldb->modules = talloc(ldb, struct ldb_module);
2099         if (!ldb->modules) {
2100                 goto failed;
2101         }
2102         ldb->modules->ldb = ldb;
2103         ldb->modules->prev = ldb->modules->next = NULL;
2104         ldb->modules->private_data = lsqlite3;
2105         ldb->modules->ops = &lsqlite3_ops;
2106
2107         if (options) {
2108                 /*
2109                  * take a copy of the options array, so we don't have to rely
2110                  * on the caller keeping it around (it might be dynamic)
2111                  */
2112                 for (i=0;options[i];i++) ;
2113
2114                 lsqlite3->options = talloc_array(lsqlite3, char *, i+1);
2115                 if (!lsqlite3->options) {
2116                         goto failed;
2117                 }
2118
2119                 for (i=0;options[i];i++) {
2120
2121                         lsqlite3->options[i+1] = NULL;
2122                         lsqlite3->options[i] =
2123                                 talloc_strdup(lsqlite3->options, options[i]);
2124                         if (!lsqlite3->options[i]) {
2125                                 goto failed;
2126                         }
2127                 }
2128         }
2129
2130         return 0;
2131
2132 failed:
2133         if (lsqlite3->sqlite != NULL) {
2134                 (void) sqlite3_close(lsqlite3->sqlite);
2135         }
2136         talloc_free(lsqlite3);
2137         return -1;
2138 }
2139
2140 int ldb_sqlite3_init(void)
2141 {
2142         return ldb_register_backend("sqlite3", lsqlite3_connect);
2143 }