source3/lib/smbconf/smbconf_init.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  libsmbconf - Samba configuration library, init dispatcher
   4  *  Copyright (C) Michael Adam 2008
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "lib/smbconf/smbconf_private.h"
  22 #include "lib/smbconf/smbconf_txt.h"
  23 #include "lib/smbconf/smbconf_reg.h"
  24 #include "lib/smbconf/smbconf_init.h"
  25
  26 /**
  27  * smbconf initialization dispatcher
  28  *
  29  * this takes a configuration source in the form of
  30  * backend:path and calles the appropriate backend
  31  * init function with the path argument
  32  *
  33  * known backends:
  34  * -  "registry" or "reg"
  35  * -  "txt" or "file"
  36  */
  37 sbcErr smbconf_init(TALLOC_CTX *mem_ctx, struct smbconf_ctx **conf_ctx,
  38                     const char *source)
  39 {
  40         sbcErr err;
  41         char *backend = NULL;
  42         char *path = NULL;
  43         char *sep;
  44         TALLOC_CTX *tmp_ctx = talloc_stackframe();
  45
  46         if (conf_ctx == NULL) {
  47                 err = SBC_ERR_INVALID_PARAM;
  48                 goto done;
  49         }
  50
  51         if ((source == NULL) || (*source == '\0')) {
  52                 err = SBC_ERR_INVALID_PARAM;
  53                 goto done;
  54         }
  55
  56         backend = talloc_strdup(tmp_ctx, source);
  57         if (backend == NULL) {
  58                 err = SBC_ERR_NOMEM;
  59                 goto done;
  60         }
  61
  62         sep = strchr(backend, ':');
  63         if (sep != NULL) {
  64                 *sep = '\0';
  65                 path = sep + 1;
  66                 if (strlen(path) == 0) {
  67                         path = NULL;
  68                 }
  69         }
  70
  71         if (strequal(backend, "registry") || strequal(backend, "reg")) {
  72                 err = smbconf_init_reg(mem_ctx, conf_ctx, path);
  73         } else if (strequal(backend, "file") || strequal(backend, "txt")) {
  74                 err = smbconf_init_txt(mem_ctx, conf_ctx, path);
  75         } else if (sep == NULL) {
  76                 /*
  77                  * If no separator was given in the source, and the string is
  78                  * not a known backend, assume file backend and use the source
  79                  * string as a path argument.
  80                  */
  81                 err = smbconf_init_txt(mem_ctx, conf_ctx, backend);
  82         } else {
  83                 /*
  84                  * Separator was specified but this is not a known backend.
  85                  * As a last resort, try to interpret the original source
  86                  * string as a file name that contains a ":" sign.
  87                  * This may occur with an include directive like this:
  88                  * 'include = /path/to/file.%T'
  89                  */
  90                 err = smbconf_init_txt(mem_ctx, conf_ctx, source);
  91         }
  92
  93 done:
  94         talloc_free(tmp_ctx);
  95         return err;
  96 }