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         char **pp;
  47
  48         if ( !keyname )
  49                 return ctr->num_subkeys;
  50
  51         /* make sure the keyname is not already there */
  52
  53         if ( regsubkey_ctr_key_exists( ctr, keyname ) )
  54                 return ctr->num_subkeys;
  55
  56         /* allocate a space for the char* in the array */
  57
  58         if (  ctr->subkeys == 0 )
  59                 ctr->subkeys = TALLOC_P( ctr, char *);
  60         else {
  61                 pp = TALLOC_REALLOC_ARRAY( ctr, ctr->subkeys, char *, ctr->num_subkeys+1);
  62                 if ( pp )
  63                         ctr->subkeys = pp;
  64         }
  65
  66         /* allocate the string and save it in the array */
  67
  68         ctr->subkeys[ctr->num_subkeys] = talloc_strdup( ctr, keyname );
  69         ctr->num_subkeys++;
  70
  71         return ctr->num_subkeys;
  72 }
  73
  74  /***********************************************************************
  75  Add a new key to the array
  76  **********************************************************************/
  77
  78 int regsubkey_ctr_delkey( REGSUBKEY_CTR *ctr, const char *keyname )
  79 {
  80         int i;
  81
  82         if ( !keyname )
  83                 return ctr->num_subkeys;
  84
  85         /* make sure the keyname is actually already there */
  86
  87         for ( i=0; i<ctr->num_subkeys; i++ ) {
  88                 if ( strequal( ctr->subkeys[i], keyname ) )
  89                         break;
  90         }
  91
  92         if ( i == ctr->num_subkeys )
  93                 return ctr->num_subkeys;
  94
  95         /* update if we have any keys left */
  96         ctr->num_subkeys--;
  97         if ( i < ctr->num_subkeys )
  98                 memmove( &ctr->subkeys[i], &ctr->subkeys[i+1], sizeof(char*) * (ctr->num_subkeys-i) );
  99
 100         return ctr->num_subkeys;
 101 }
 102
 103 /***********************************************************************
 104  Check for the existance of a key
 105  **********************************************************************/
 106
 107 BOOL regsubkey_ctr_key_exists( REGSUBKEY_CTR *ctr, const char *keyname )
 108 {
 109         int     i;
 110
 111         for ( i=0; i<ctr->num_subkeys; i++ ) {
 112                 if ( strequal( ctr->subkeys[i],keyname ) )
 113                         return True;
 114         }
 115
 116         return False;
 117 }
 118
 119 /***********************************************************************
 120  How many keys does the container hold ?
 121  **********************************************************************/
 122
 123 int regsubkey_ctr_numkeys( REGSUBKEY_CTR *ctr )
 124 {
 125         return ctr->num_subkeys;
 126 }
 127
 128 /***********************************************************************
 129  Retreive a specific key string
 130  **********************************************************************/
 131
 132 char* regsubkey_ctr_specific_key( REGSUBKEY_CTR *ctr, uint32 key_index )
 133 {
 134         if ( ! (key_index < ctr->num_subkeys) )
 135                 return NULL;
 136
 137         return ctr->subkeys[key_index];
 138 }
 139
 140 /*
 141  * Utility functions for REGVAL_CTR
 142  */
 143
 144 /***********************************************************************
 145  How many keys does the container hold ?
 146  **********************************************************************/
 147
 148 int regval_ctr_numvals( REGVAL_CTR *ctr )
 149 {
 150         return ctr->num_values;
 151 }
 152
 153 /***********************************************************************
 154  allocate memory for and duplicate a REGISTRY_VALUE.
 155  This is malloc'd memory so the caller should free it when done
 156  **********************************************************************/
 157
 158 REGISTRY_VALUE* dup_registry_value( REGISTRY_VALUE *val )
 159 {
 160         REGISTRY_VALUE  *copy = NULL;
 161
 162         if ( !val )
 163                 return NULL;
 164
 165         if ( !(copy = SMB_MALLOC_P( REGISTRY_VALUE)) ) {
 166                 DEBUG(0,("dup_registry_value: malloc() failed!\n"));
 167                 return NULL;
 168         }
 169
 170         /* copy all the non-pointer initial data */
 171
 172         memcpy( copy, val, sizeof(REGISTRY_VALUE) );
 173
 174         copy->size = 0;
 175         copy->data_p = NULL;
 176
 177         if ( val->data_p && val->size )
 178         {
 179                 if ( !(copy->data_p = memdup( val->data_p, val->size )) ) {
 180                         DEBUG(0,("dup_registry_value: memdup() failed for [%d] bytes!\n",
 181                                 val->size));
 182                         SAFE_FREE( copy );
 183                 }
 184                 copy->size = val->size;
 185         }
 186
 187         return copy;
 188 }
 189
 190 /**********************************************************************
 191  free the memory allocated to a REGISTRY_VALUE
 192  *********************************************************************/
 193
 194 void free_registry_value( REGISTRY_VALUE *val )
 195 {
 196         if ( !val )
 197                 return;
 198
 199         SAFE_FREE( val->data_p );
 200         SAFE_FREE( val );
 201
 202         return;
 203 }
 204
 205 /**********************************************************************
 206  *********************************************************************/
 207
 208 uint8* regval_data_p( REGISTRY_VALUE *val )
 209 {
 210         return val->data_p;
 211 }
 212
 213 /**********************************************************************
 214  *********************************************************************/
 215
 216 uint32 regval_size( REGISTRY_VALUE *val )
 217 {
 218         return val->size;
 219 }
 220
 221 /**********************************************************************
 222  *********************************************************************/
 223
 224 char* regval_name( REGISTRY_VALUE *val )
 225 {
 226         return val->valuename;
 227 }
 228
 229 /**********************************************************************
 230  *********************************************************************/
 231
 232 uint32 regval_type( REGISTRY_VALUE *val )
 233 {
 234         return val->type;
 235 }
 236
 237 /***********************************************************************
 238  Retreive a pointer to a specific value.  Caller shoud dup the structure
 239  since this memory will go away when the ctr is free()'d
 240  **********************************************************************/
 241
 242 REGISTRY_VALUE* regval_ctr_specific_value( REGVAL_CTR *ctr, uint32 idx )
 243 {
 244         if ( !(idx < ctr->num_values) )
 245                 return NULL;
 246
 247         return ctr->values[idx];
 248 }
 249
 250 /***********************************************************************
 251  Check for the existance of a value
 252  **********************************************************************/
 253
 254 BOOL regval_ctr_key_exists( REGVAL_CTR *ctr, const char *value )
 255 {
 256         int     i;
 257
 258         for ( i=0; i<ctr->num_values; i++ ) {
 259                 if ( strequal( ctr->values[i]->valuename, value) )
 260                         return True;
 261         }
 262
 263         return False;
 264 }
 265 /***********************************************************************
 266  Add a new registry value to the array
 267  **********************************************************************/
 268
 269 int regval_ctr_addvalue( REGVAL_CTR *ctr, const char *name, uint16 type,
 270                          const char *data_p, size_t size )
 271 {
 272         REGISTRY_VALUE **ppreg;
 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                 ppreg = TALLOC_REALLOC_ARRAY( ctr, ctr->values, REGISTRY_VALUE *, ctr->num_values+1 );
 287                 if ( ppreg )
 288                         ctr->values = ppreg;
 289         }
 290
 291         /* allocate a new value and store the pointer in the arrya */
 292
 293         ctr->values[ctr->num_values] = TALLOC_P( ctr, REGISTRY_VALUE);
 294
 295         /* init the value */
 296
 297         fstrcpy( ctr->values[ctr->num_values]->valuename, name );
 298         ctr->values[ctr->num_values]->type = type;
 299         ctr->values[ctr->num_values]->data_p = TALLOC_MEMDUP( ctr, data_p, size );
 300         ctr->values[ctr->num_values]->size = size;
 301         ctr->num_values++;
 302
 303         return ctr->num_values;
 304 }
 305
 306 /***********************************************************************
 307  Add a new registry value to the array
 308  **********************************************************************/
 309
 310 int regval_ctr_copyvalue( REGVAL_CTR *ctr, REGISTRY_VALUE *val )
 311 {
 312         REGISTRY_VALUE **ppreg;
 313
 314         if ( val )
 315         {
 316                 /* allocate a slot in the array of pointers */
 317
 318                 if (  ctr->num_values == 0 )
 319                         ctr->values = TALLOC_P( ctr, REGISTRY_VALUE *);
 320                 else {
 321                         ppreg = TALLOC_REALLOC_ARRAY( ctr, ctr->values, REGISTRY_VALUE *, ctr->num_values+1 );
 322                         if ( ppreg )
 323                                 ctr->values = ppreg;
 324                 }
 325
 326                 /* allocate a new value and store the pointer in the arrya */
 327
 328                 ctr->values[ctr->num_values] = TALLOC_P( ctr, REGISTRY_VALUE);
 329
 330                 /* init the value */
 331
 332                 fstrcpy( ctr->values[ctr->num_values]->valuename, val->valuename );
 333                 ctr->values[ctr->num_values]->type = val->type;
 334                 ctr->values[ctr->num_values]->data_p = TALLOC_MEMDUP( ctr, val->data_p, val->size );
 335                 ctr->values[ctr->num_values]->size = val->size;
 336                 ctr->num_values++;
 337         }
 338
 339         return ctr->num_values;
 340 }
 341
 342 /***********************************************************************
 343  Delete a single value from the registry container.
 344  No need to free memory since it is talloc'd.
 345  **********************************************************************/
 346
 347 int regval_ctr_delvalue( REGVAL_CTR *ctr, const char *name )
 348 {
 349         int     i;
 350
 351         for ( i=0; i<ctr->num_values; i++ ) {
 352                 if ( strequal( ctr->values[i]->valuename, name ) )
 353                         break;
 354         }
 355
 356         /* just return if we don't find it */
 357
 358         if ( i == ctr->num_values )
 359                 return ctr->num_values;
 360
 361         /* If 'i' was not the last element, just shift everything down one */
 362         ctr->num_values--;
 363         if ( i < ctr->num_values )
 364                 memmove( &ctr->values[i], &ctr->values[i+1], sizeof(REGISTRY_VALUE*)*(ctr->num_values-i) );
 365
 366         return ctr->num_values;
 367 }
 368
 369 /***********************************************************************
 370  Retrieve single value from the registry container.
 371  No need to free memory since it is talloc'd.
 372  **********************************************************************/
 373
 374 REGISTRY_VALUE* regval_ctr_getvalue( REGVAL_CTR *ctr, const char *name )
 375 {
 376         int     i;
 377
 378         /* search for the value */
 379
 380         for ( i=0; i<ctr->num_values; i++ ) {
 381                 if ( strequal( ctr->values[i]->valuename, name ) )
 382                         return ctr->values[i];
 383         }
 384
 385         return NULL;
 386 }
 387