lib/smbconf/smbconf.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  libsmbconf - Samba configuration library
   4  *  Copyright (C) Michael Adam 2007-2008
   5  *  Copyright (C) Guenther Deschner 2007
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "includes.h"
  22 #include "smbconf_private.h"
  23
  24 /**********************************************************************
  25  *
  26  * internal helper functions
  27  *
  28  **********************************************************************/
  29
  30 static sbcErr smbconf_global_check(struct smbconf_ctx *ctx)
  31 {
  32         if (!smbconf_share_exists(ctx, GLOBAL_NAME)) {
  33                 return smbconf_create_share(ctx, GLOBAL_NAME);
  34         }
  35
  36         return SBC_ERR_OK;
  37 }
  38
  39
  40 /**********************************************************************
  41  *
  42  * The actual libsmbconf API functions that are exported.
  43  *
  44  **********************************************************************/
  45
  46 const char *sbcErrorString(sbcErr error)
  47 {
  48         switch (error) {
  49                 case SBC_ERR_OK:
  50                         return "SBC_ERR_OK";
  51                 case SBC_ERR_NOT_IMPLEMENTED:
  52                         return "SBC_ERR_NOT_IMPLEMENTED";
  53                 case SBC_ERR_NOT_SUPPORTED:
  54                         return "SBC_ERR_NOT_SUPPORTED";
  55                 case SBC_ERR_UNKNOWN_FAILURE:
  56                         return "SBC_ERR_UNKNOWN_FAILURE";
  57                 case SBC_ERR_NOMEM:
  58                         return "SBC_ERR_NOMEM";
  59                 case SBC_ERR_INVALID_PARAM:
  60                         return "SBC_ERR_INVALID_PARAM";
  61                 case SBC_ERR_BADFILE:
  62                         return "SBC_ERR_BADFILE";
  63                 case SBC_ERR_NO_SUCH_SERVICE:
  64                         return "SBC_ERR_NO_SUCH_SERVICE";
  65                 case SBC_ERR_IO_FAILURE:
  66                         return "SBC_ERR_IO_FAILURE";
  67                 case SBC_ERR_CAN_NOT_COMPLETE:
  68                         return "SBC_ERR_CAN_NOT_COMPLETE";
  69                 case SBC_ERR_NO_MORE_ITEMS:
  70                         return "SBC_ERR_NO_MORE_ITEMS";
  71                 case SBC_ERR_FILE_EXISTS:
  72                         return "SBC_ERR_FILE_EXISTS";
  73                 case SBC_ERR_ACCESS_DENIED:
  74                         return "SBC_ERR_ACCESS_DENIED";
  75         }
  76
  77         return "unknown sbcErr value";
  78 }
  79
  80
  81 /**
  82  * Tell whether the backend requires messaging to be set up
  83  * for the backend to work correctly.
  84  */
  85 bool smbconf_backend_requires_messaging(struct smbconf_ctx *ctx)
  86 {
  87         return ctx->ops->requires_messaging(ctx);
  88 }
  89
  90 /**
  91  * Tell whether the source is writeable.
  92  */
  93 bool smbconf_is_writeable(struct smbconf_ctx *ctx)
  94 {
  95         return ctx->ops->is_writeable(ctx);
  96 }
  97
  98 /**
  99  * Close the configuration.
 100  */
 101 void smbconf_shutdown(struct smbconf_ctx *ctx)
 102 {
 103         talloc_free(ctx);
 104 }
 105
 106 /**
 107  * Detect changes in the configuration.
 108  * The given csn struct is filled with the current csn.
 109  * smbconf_changed() can also be used for initial retrieval
 110  * of the csn.
 111  */
 112 bool smbconf_changed(struct smbconf_ctx *ctx, struct smbconf_csn *csn,
 113                      const char *service, const char *param)
 114 {
 115         struct smbconf_csn old_csn;
 116
 117         if (csn == NULL) {
 118                 return false;
 119         }
 120
 121         old_csn = *csn;
 122
 123         ctx->ops->get_csn(ctx, csn, service, param);
 124         return (csn->csn != old_csn.csn);
 125 }
 126
 127 /**
 128  * Drop the whole configuration (restarting empty).
 129  */
 130 sbcErr smbconf_drop(struct smbconf_ctx *ctx)
 131 {
 132         return ctx->ops->drop(ctx);
 133 }
 134
 135 /**
 136  * Get the whole configuration as lists of strings with counts:
 137  *
 138  *  num_shares   : number of shares
 139  *  share_names  : list of length num_shares of share names
 140  *  num_params   : list of length num_shares of parameter counts for each share
 141  *  param_names  : list of lists of parameter names for each share
 142  *  param_values : list of lists of parameter values for each share
 143  */
 144 sbcErr smbconf_get_config(struct smbconf_ctx *ctx,
 145                           TALLOC_CTX *mem_ctx,
 146                           uint32_t *num_shares,
 147                           struct smbconf_service ***services)
 148 {
 149         sbcErr err;
 150         TALLOC_CTX *tmp_ctx = NULL;
 151         uint32_t tmp_num_shares;
 152         char **tmp_share_names;
 153         struct smbconf_service **tmp_services;
 154         uint32_t count;
 155
 156         if ((num_shares == NULL) || (services == NULL)) {
 157                 err = SBC_ERR_INVALID_PARAM;
 158                 goto done;
 159         }
 160
 161         tmp_ctx = talloc_stackframe();
 162
 163         err = smbconf_get_share_names(ctx, tmp_ctx, &tmp_num_shares,
 164                                       &tmp_share_names);
 165         if (!SBC_ERROR_IS_OK(err)) {
 166                 goto done;
 167         }
 168
 169         tmp_services = talloc_array(tmp_ctx, struct smbconf_service *,
 170                                     tmp_num_shares);
 171         if (tmp_services == NULL) {
 172                 err = SBC_ERR_NOMEM;
 173                 goto done;
 174         }
 175
 176         for (count = 0; count < tmp_num_shares; count++) {
 177                 err = smbconf_get_share(ctx, tmp_services,
 178                                         tmp_share_names[count],
 179                                         &tmp_services[count]);
 180                 if (!SBC_ERROR_IS_OK(err)) {
 181                         goto done;
 182                 }
 183         }
 184
 185         err = SBC_ERR_OK;
 186
 187         *num_shares = tmp_num_shares;
 188         if (tmp_num_shares > 0) {
 189                 *services = talloc_move(mem_ctx, &tmp_services);
 190         } else {
 191                 *services = NULL;
 192         }
 193
 194 done:
 195         talloc_free(tmp_ctx);
 196         return err;
 197 }
 198
 199 /**
 200  * get the list of share names defined in the configuration.
 201  */
 202 sbcErr smbconf_get_share_names(struct smbconf_ctx *ctx,
 203                                TALLOC_CTX *mem_ctx,
 204                                uint32_t *num_shares,
 205                                char ***share_names)
 206 {
 207         return ctx->ops->get_share_names(ctx, mem_ctx, num_shares,
 208                                          share_names);
 209 }
 210
 211 /**
 212  * check if a share/service of a given name exists
 213  */
 214 bool smbconf_share_exists(struct smbconf_ctx *ctx,
 215                           const char *servicename)
 216 {
 217         return ctx->ops->share_exists(ctx, servicename);
 218 }
 219
 220 /**
 221  * Add a service if it does not already exist.
 222  */
 223 sbcErr smbconf_create_share(struct smbconf_ctx *ctx,
 224                             const char *servicename)
 225 {
 226         if ((servicename != NULL) && smbconf_share_exists(ctx, servicename)) {
 227                 return SBC_ERR_FILE_EXISTS;
 228         }
 229
 230         return ctx->ops->create_share(ctx, servicename);
 231 }
 232
 233 /**
 234  * get a definition of a share (service) from configuration.
 235  */
 236 sbcErr smbconf_get_share(struct smbconf_ctx *ctx,
 237                          TALLOC_CTX *mem_ctx,
 238                          const char *servicename,
 239                          struct smbconf_service **service)
 240 {
 241         return ctx->ops->get_share(ctx, mem_ctx, servicename, service);
 242 }
 243
 244 /**
 245  * delete a service from configuration
 246  */
 247 sbcErr smbconf_delete_share(struct smbconf_ctx *ctx, const char *servicename)
 248 {
 249         if (!smbconf_share_exists(ctx, servicename)) {
 250                 return SBC_ERR_NO_SUCH_SERVICE;
 251         }
 252
 253         return ctx->ops->delete_share(ctx, servicename);
 254 }
 255
 256 /**
 257  * set a configuration parameter to the value provided.
 258  */
 259 sbcErr smbconf_set_parameter(struct smbconf_ctx *ctx,
 260                              const char *service,
 261                              const char *param,
 262                              const char *valstr)
 263 {
 264         return ctx->ops->set_parameter(ctx, service, param, valstr);
 265 }
 266
 267 /**
 268  * Set a global parameter
 269  * (i.e. a parameter in the [global] service).
 270  *
 271  * This also creates [global] when it does not exist.
 272  */
 273 sbcErr smbconf_set_global_parameter(struct smbconf_ctx *ctx,
 274                                     const char *param, const char *val)
 275 {
 276         sbcErr err;
 277
 278         err = smbconf_global_check(ctx);
 279         if (!SBC_ERROR_IS_OK(err)) {
 280                 return err;
 281         }
 282         err = smbconf_set_parameter(ctx, GLOBAL_NAME, param, val);
 283
 284         return err;
 285 }
 286
 287 /**
 288  * get the value of a configuration parameter as a string
 289  */
 290 sbcErr smbconf_get_parameter(struct smbconf_ctx *ctx,
 291                              TALLOC_CTX *mem_ctx,
 292                              const char *service,
 293                              const char *param,
 294                              char **valstr)
 295 {
 296         if (valstr == NULL) {
 297                 return SBC_ERR_INVALID_PARAM;
 298         }
 299
 300         return ctx->ops->get_parameter(ctx, mem_ctx, service, param, valstr);
 301 }
 302
 303 /**
 304  * Get the value of a global parameter.
 305  *
 306  * Create [global] if it does not exist.
 307  */
 308 sbcErr smbconf_get_global_parameter(struct smbconf_ctx *ctx,
 309                                     TALLOC_CTX *mem_ctx,
 310                                     const char *param,
 311                                     char **valstr)
 312 {
 313         sbcErr err;
 314
 315         err = smbconf_global_check(ctx);
 316         if (!SBC_ERROR_IS_OK(err)) {
 317                 return err;
 318         }
 319
 320         err = smbconf_get_parameter(ctx, mem_ctx, GLOBAL_NAME, param,
 321                                     valstr);
 322
 323         return err;
 324 }
 325
 326 /**
 327  * delete a parameter from configuration
 328  */
 329 sbcErr smbconf_delete_parameter(struct smbconf_ctx *ctx,
 330                                 const char *service, const char *param)
 331 {
 332         return ctx->ops->delete_parameter(ctx, service, param);
 333 }
 334
 335 /**
 336  * Delete a global parameter.
 337  *
 338  * Create [global] if it does not exist.
 339  */
 340 sbcErr smbconf_delete_global_parameter(struct smbconf_ctx *ctx,
 341                                        const char *param)
 342 {
 343         sbcErr err;
 344
 345         err = smbconf_global_check(ctx);
 346         if (!SBC_ERROR_IS_OK(err)) {
 347                 return err;
 348         }
 349         err = smbconf_delete_parameter(ctx, GLOBAL_NAME, param);
 350
 351         return err;
 352 }
 353
 354 sbcErr smbconf_get_includes(struct smbconf_ctx *ctx,
 355                             TALLOC_CTX *mem_ctx,
 356                             const char *service,
 357                             uint32_t *num_includes, char ***includes)
 358 {
 359         return ctx->ops->get_includes(ctx, mem_ctx, service, num_includes,
 360                                       includes);
 361 }
 362
 363 sbcErr smbconf_get_global_includes(struct smbconf_ctx *ctx,
 364                                    TALLOC_CTX *mem_ctx,
 365                                    uint32_t *num_includes, char ***includes)
 366 {
 367         sbcErr err;
 368
 369         err = smbconf_global_check(ctx);
 370         if (!SBC_ERROR_IS_OK(err)) {
 371                 return err;
 372         }
 373         err = smbconf_get_includes(ctx, mem_ctx, GLOBAL_NAME,
 374                                     num_includes, includes);
 375
 376         return err;
 377 }
 378
 379 sbcErr smbconf_set_includes(struct smbconf_ctx *ctx,
 380                             const char *service,
 381                             uint32_t num_includes, const char **includes)
 382 {
 383         return ctx->ops->set_includes(ctx, service, num_includes, includes);
 384 }
 385
 386 sbcErr smbconf_set_global_includes(struct smbconf_ctx *ctx,
 387                                    uint32_t num_includes,
 388                                    const char **includes)
 389 {
 390         sbcErr err;
 391
 392         err = smbconf_global_check(ctx);
 393         if (!SBC_ERROR_IS_OK(err)) {
 394                 return err;
 395         }
 396         err = smbconf_set_includes(ctx, GLOBAL_NAME,
 397                                    num_includes, includes);
 398
 399         return err;
 400 }
 401
 402
 403 sbcErr smbconf_delete_includes(struct smbconf_ctx *ctx, const char *service)
 404 {
 405         return ctx->ops->delete_includes(ctx, service);
 406 }
 407
 408 sbcErr smbconf_delete_global_includes(struct smbconf_ctx *ctx)
 409 {
 410         sbcErr err;
 411
 412         err = smbconf_global_check(ctx);
 413         if (!SBC_ERROR_IS_OK(err)) {
 414                 return err;
 415         }
 416         err = smbconf_delete_includes(ctx, GLOBAL_NAME);
 417
 418         return err;
 419 }
 420
 421 sbcErr smbconf_transaction_start(struct smbconf_ctx *ctx)
 422 {
 423         return ctx->ops->transaction_start(ctx);
 424 }
 425
 426 sbcErr smbconf_transaction_commit(struct smbconf_ctx *ctx)
 427 {
 428         return ctx->ops->transaction_commit(ctx);
 429 }
 430
 431 sbcErr smbconf_transaction_cancel(struct smbconf_ctx *ctx)
 432 {
 433         return ctx->ops->transaction_cancel(ctx);
 434 }