source/registry/reg_objects.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 2 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, write to the Free Software
  18  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 /* Implementation of registry frontend view functions. */
  22
  23 #include "includes.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_RPC_SRV
  27
  28 /**********************************************************************
  29
  30  Note that the REGSUB_CTR and REGVAL_CTR objects *must* be talloc()'d
  31  since the methods use the object pointer as the talloc context for
  32  internal private data.
  33
  34  There is no longer a regXXX_ctr_intit() and regXXX_ctr_destroy()
  35  pair of functions.  Simply TALLOC_ZERO_P() and TALLOC_FREE() the
  36  object.
  37
  38  **********************************************************************/
  39
  40 /***********************************************************************
  41  Add a new key to the array
  42  **********************************************************************/
  43
  44 int regsubkey_ctr_addkey( REGSUBKEY_CTR *ctr, const char *keyname )
  45 {
  46         if ( !keyname )
  47                 return ctr->num_subkeys;
  48
  49         /* make sure the keyname is not already there */
  50
  51         if ( regsubkey_ctr_key_exists( ctr, keyname ) )
  52                 return ctr->num_subkeys;
  53
  54         /* allocate a space for the char* in the array */
  55
  56         if (ctr->subkeys == NULL) {
  57                 ctr->subkeys = TALLOC_P(ctr, char *);
  58         } else {
  59                 ctr->subkeys = TALLOC_REALLOC_ARRAY(ctr, ctr->subkeys, char *, ctr->num_subkeys+1);
  60         }
  61
  62         if (!ctr->subkeys) {
  63                 ctr->num_subkeys = 0;
  64                 return 0;
  65         }
  66
  67         /* allocate the string and save it in the array */
  68
  69         ctr->subkeys[ctr->num_subkeys] = talloc_strdup( ctr, keyname );
  70         ctr->num_subkeys++;
  71
  72         return ctr->num_subkeys;
  73 }
  74
  75  /***********************************************************************
  76  Add a new key to the array
  77  **********************************************************************/
  78
  79 int regsubkey_ctr_delkey( REGSUBKEY_CTR *ctr, const char *keyname )
  80 {
  81         int i;
  82
  83         if ( !keyname )
  84                 return ctr->num_subkeys;
  85
  86         /* make sure the keyname is actually already there */
  87
  88         for ( i=0; i<ctr->num_subkeys; i++ ) {
  89                 if ( strequal( ctr->subkeys[i], keyname ) )
  90                         break;
  91         }
  92
  93         if ( i == ctr->num_subkeys )
  94                 return ctr->num_subkeys;
  95
  96         /* update if we have any keys left */
  97         ctr->num_subkeys--;
  98         if ( i < ctr->num_subkeys )
  99                 memmove( &ctr->subkeys[i], &ctr->subkeys[i+1], sizeof(char*) * (ctr->num_subkeys-i) );
 100
 101         return ctr->num_subkeys;
 102 }
 103
 104 /***********************************************************************
 105  Check for the existance of a key
 106  **********************************************************************/
 107
 108 BOOL regsubkey_ctr_key_exists( REGSUBKEY_CTR *ctr, const char *keyname )
 109 {
 110         int     i;
 111
 112         for ( i=0; i<ctr->num_subkeys; i++ ) {
 113                 if ( strequal( ctr->subkeys[i],keyname ) )
 114                         return True;
 115         }
 116
 117         return False;
 118 }
 119
 120 /***********************************************************************
 121  How many keys does the container hold ?
 122  **********************************************************************/
 123
 124 int regsubkey_ctr_numkeys( REGSUBKEY_CTR *ctr )
 125 {
 126         return ctr->num_subkeys;
 127 }
 128
 129 /***********************************************************************
 130  Retreive a specific key string
 131  **********************************************************************/
 132
 133 char* regsubkey_ctr_specific_key( REGSUBKEY_CTR *ctr, uint32 key_index )
 134 {
 135         if ( ! (key_index < ctr->num_subkeys) )
 136                 return NULL;
 137
 138         return ctr->subkeys[key_index];
 139 }
 140
 141 /*
 142  * Utility functions for REGVAL_CTR
 143  */
 144
 145 /***********************************************************************
 146  How many keys does the container hold ?
 147  **********************************************************************/
 148
 149 int regval_ctr_numvals( REGVAL_CTR *ctr )
 150 {
 151         return ctr->num_values;
 152 }
 153
 154 /***********************************************************************
 155  allocate memory for and duplicate a REGISTRY_VALUE.
 156  This is malloc'd memory so the caller should free it when done
 157  **********************************************************************/
 158
 159 REGISTRY_VALUE* dup_registry_value( REGISTRY_VALUE *val )
 160 {
 161         REGISTRY_VALUE  *copy = NULL;
 162
 163         if ( !val )
 164                 return NULL;
 165
 166         if ( !(copy = SMB_MALLOC_P( REGISTRY_VALUE)) ) {
 167                 DEBUG(0,("dup_registry_value: malloc() failed!\n"));
 168                 return NULL;
 169         }
 170
 171         /* copy all the non-pointer initial data */
 172
 173         memcpy( copy, val, sizeof(REGISTRY_VALUE) );
 174
 175         copy->size = 0;
 176         copy->data_p = NULL;
 177
 178         if ( val->data_p && val->size )
 179         {
 180                 if ( !(copy->data_p = (uint8 *)memdup( val->data_p,
 181                                                        val->size )) ) {
 182                         DEBUG(0,("dup_registry_value: memdup() failed for [%d] bytes!\n",
 183                                 val->size));
 184                         SAFE_FREE( copy );
 185                 }
 186                 copy->size = val->size;
 187         }
 188
 189         return copy;
 190 }
 191
 192 /**********************************************************************
 193  free the memory allocated to a REGISTRY_VALUE
 194  *********************************************************************/
 195
 196 void free_registry_value( REGISTRY_VALUE *val )
 197 {
 198         if ( !val )
 199                 return;
 200
 201         SAFE_FREE( val->data_p );
 202         SAFE_FREE( val );
 203
 204         return;
 205 }
 206
 207 /**********************************************************************
 208  *********************************************************************/
 209
 210 uint8* regval_data_p( REGISTRY_VALUE *val )
 211 {
 212         return val->data_p;
 213 }
 214
 215 /**********************************************************************
 216  *********************************************************************/
 217
 218 uint32 regval_size( REGISTRY_VALUE *val )
 219 {
 220         return val->size;
 221 }
 222
 223 /**********************************************************************
 224  *********************************************************************/
 225
 226 char* regval_name( REGISTRY_VALUE *val )
 227 {
 228         return val->valuename;
 229 }
 230
 231 /**********************************************************************
 232  *********************************************************************/
 233
 234 uint32 regval_type( REGISTRY_VALUE *val )
 235 {
 236         return val->type;
 237 }
 238
 239 /***********************************************************************
 240  Retreive a pointer to a specific value.  Caller shoud dup the structure
 241  since this memory will go away when the ctr is free()'d
 242  **********************************************************************/
 243
 244 REGISTRY_VALUE* regval_ctr_specific_value( REGVAL_CTR *ctr, uint32 idx )
 245 {
 246         if ( !(idx < ctr->num_values) )
 247                 return NULL;
 248
 249         return ctr->values[idx];
 250 }
 251
 252 /***********************************************************************
 253  Check for the existance of a value
 254  **********************************************************************/
 255
 256 BOOL regval_ctr_key_exists( REGVAL_CTR *ctr, const char *value )
 257 {
 258         int     i;
 259
 260         for ( i=0; i<ctr->num_values; i++ ) {
 261                 if ( strequal( ctr->values[i]->valuename, value) )
 262                         return True;
 263         }
 264
 265         return False;
 266 }
 267 /***********************************************************************
 268  Add a new registry value to the array
 269  **********************************************************************/
 270
 271 int regval_ctr_addvalue( REGVAL_CTR *ctr, const char *name, uint16 type,
 272                          const char *data_p, size_t size )
 273 {
 274         if ( !name )
 275                 return ctr->num_values;
 276
 277         /* Delete the current value (if it exists) and add the new one */
 278
 279         regval_ctr_delvalue( ctr, name );
 280
 281         /* allocate a slot in the array of pointers */
 282
 283         if (  ctr->num_values == 0 ) {
 284                 ctr->values = TALLOC_P( ctr, REGISTRY_VALUE *);
 285         } else {
 286                 ctr->values = TALLOC_REALLOC_ARRAY( ctr, ctr->values, REGISTRY_VALUE *, ctr->num_values+1 );
 287         }
 288
 289         if (!ctr->values) {
 290                 ctr->num_values = 0;
 291                 return 0;
 292         }
 293
 294         /* allocate a new value and store the pointer in the arrya */
 295
 296         ctr->values[ctr->num_values] = TALLOC_P( ctr, REGISTRY_VALUE);
 297         if (!ctr->values[ctr->num_values]) {
 298                 ctr->num_values = 0;
 299                 return 0;
 300         }
 301
 302         /* init the value */
 303
 304         fstrcpy( ctr->values[ctr->num_values]->valuename, name );
 305         ctr->values[ctr->num_values]->type = type;
 306         ctr->values[ctr->num_values]->data_p = (uint8 *)TALLOC_MEMDUP(
 307                 ctr, data_p, size );
 308         ctr->values[ctr->num_values]->size = size;
 309         ctr->num_values++;
 310
 311         return ctr->num_values;
 312 }
 313
 314 /***********************************************************************
 315  Add a new registry value to the array
 316  **********************************************************************/
 317
 318 int regval_ctr_copyvalue( REGVAL_CTR *ctr, REGISTRY_VALUE *val )
 319 {
 320         if ( val ) {
 321                 /* allocate a slot in the array of pointers */
 322
 323                 if (  ctr->num_values == 0 ) {
 324                         ctr->values = TALLOC_P( ctr, REGISTRY_VALUE *);
 325                 } else {
 326                         ctr->values = TALLOC_REALLOC_ARRAY( ctr, ctr->values, REGISTRY_VALUE *, ctr->num_values+1 );
 327                 }
 328
 329                 if (!ctr->values) {
 330                         ctr->num_values = 0;
 331                         return 0;
 332                 }
 333
 334                 /* allocate a new value and store the pointer in the arrya */
 335
 336                 ctr->values[ctr->num_values] = TALLOC_P( ctr, REGISTRY_VALUE);
 337                 if (!ctr->values[ctr->num_values]) {
 338                         ctr->num_values = 0;
 339                         return 0;
 340                 }
 341
 342                 /* init the value */
 343
 344                 fstrcpy( ctr->values[ctr->num_values]->valuename, val->valuename );
 345                 ctr->values[ctr->num_values]->type = val->type;
 346                 ctr->values[ctr->num_values]->data_p = (uint8 *)TALLOC_MEMDUP(
 347                         ctr, val->data_p, val->size );
 348                 ctr->values[ctr->num_values]->size = val->size;
 349                 ctr->num_values++;
 350         }
 351
 352         return ctr->num_values;
 353 }
 354
 355 /***********************************************************************
 356  Delete a single value from the registry container.
 357  No need to free memory since it is talloc'd.
 358  **********************************************************************/
 359
 360 int regval_ctr_delvalue( REGVAL_CTR *ctr, const char *name )
 361 {
 362         int     i;
 363
 364         for ( i=0; i<ctr->num_values; i++ ) {
 365                 if ( strequal( ctr->values[i]->valuename, name ) )
 366                         break;
 367         }
 368
 369         /* just return if we don't find it */
 370
 371         if ( i == ctr->num_values )
 372                 return ctr->num_values;
 373
 374         /* If 'i' was not the last element, just shift everything down one */
 375         ctr->num_values--;
 376         if ( i < ctr->num_values )
 377                 memmove( &ctr->values[i], &ctr->values[i+1], sizeof(REGISTRY_VALUE*)*(ctr->num_values-i) );
 378
 379         return ctr->num_values;
 380 }
 381
 382 /***********************************************************************
 383  Retrieve single value from the registry container.
 384  No need to free memory since it is talloc'd.
 385  **********************************************************************/
 386
 387 REGISTRY_VALUE* regval_ctr_getvalue( REGVAL_CTR *ctr, const char *name )
 388 {
 389         int     i;
 390
 391         /* search for the value */
 392
 393         for ( i=0; i<ctr->num_values; i++ ) {
 394                 if ( strequal( ctr->values[i]->valuename, name ) )
 395                         return ctr->values[i];
 396         }
 397
 398         return NULL;
 399 }
 400
 401 /***********************************************************************
 402  return the data_p as a uint32
 403  **********************************************************************/
 404
 405 uint32 regval_dword( REGISTRY_VALUE *val )
 406 {
 407         uint32 data;
 408
 409         data = IVAL( regval_data_p(val), 0 );
 410
 411         return data;
 412 }
 413
 414 /***********************************************************************
 415  return the data_p as a character string
 416  **********************************************************************/
 417
 418 char* regval_sz( REGISTRY_VALUE *val )
 419 {
 420         static pstring data;
 421
 422         rpcstr_pull( data, regval_data_p(val), sizeof(data), regval_size(val), 0 );
 423
 424         return data;
 425 }