source/passdb/pdb_plugin.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Loadable passdb module interface.
   4    Copyright (C) Jelmer Vernooij 2002
   5    Copyright (C) Andrew Bartlett 2002
   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 2 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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_PASSDB
  26
  27 NTSTATUS pdb_init_plugin(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
  28 {
  29         void * dl_handle;
  30         char *plugin_location, *plugin_name, *p;
  31         pdb_init_function plugin_init;
  32         int (*plugin_version)(void);
  33
  34         if (location == NULL) {
  35                 DEBUG(0, ("The plugin module needs an argument!\n"));
  36                 return NT_STATUS_UNSUCCESSFUL;
  37         }
  38
  39         plugin_name = smb_xstrdup(location);
  40         p = strchr(plugin_name, ':');
  41         if (p) {
  42                 *p = 0;
  43                 plugin_location = p+1;
  44                 trim_string(plugin_location, " ", " ");
  45         } else plugin_location = NULL;
  46         trim_string(plugin_name, " ", " ");
  47
  48         DEBUG(5, ("Trying to load sam plugin %s\n", plugin_name));
  49         dl_handle = sys_dlopen(plugin_name, RTLD_NOW );
  50         if (!dl_handle) {
  51                 DEBUG(0, ("Failed to load sam plugin %s using sys_dlopen (%s)\n", plugin_name, sys_dlerror()));
  52                 return NT_STATUS_UNSUCCESSFUL;
  53         }
  54
  55         plugin_version = sys_dlsym(dl_handle, "pdb_version");
  56         if (!plugin_version) {
  57                 sys_dlclose(dl_handle);
  58                 DEBUG(0, ("Failed to find function 'pdb_version' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));
  59                 return NT_STATUS_UNSUCCESSFUL;
  60         }
  61
  62         if (plugin_version() != PASSDB_INTERFACE_VERSION) {
  63                 sys_dlclose(dl_handle);
  64                 DEBUG(0, ("Wrong PASSDB_INTERFACE_VERSION! sam plugin has version %d and version %d is needed! Please update!\n",
  65                             plugin_version(),PASSDB_INTERFACE_VERSION));
  66                 return NT_STATUS_UNSUCCESSFUL;
  67         }
  68
  69         plugin_init = sys_dlsym(dl_handle, "pdb_init");
  70         if (!plugin_init) {
  71                 sys_dlclose(dl_handle);
  72                 DEBUG(0, ("Failed to find function 'pdb_init' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));
  73                 return NT_STATUS_UNSUCCESSFUL;
  74         }
  75
  76         DEBUG(5, ("Starting sam plugin %s with location %s\n", plugin_name, plugin_location));
  77         return plugin_init(pdb_context, pdb_method, plugin_location);
  78 }