source3/sam/sam_plugin.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Loadable san module interface.
   4    Copyright (C) Jelmer Vernooij                        2002
   5    Copyright (C) Andrew Bartlett                        2002
   6    Copyright (C) Stefan (metze) Metzmacher              2002
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_SAM
  27
  28 NTSTATUS sam_init_plugin(SAM_METHODS *sam_methods, const char *module_params)
  29 {
  30         void *dl_handle;
  31         char *plugin_params, *plugin_name, *p;
  32         sam_init_function plugin_init;
  33         int (*plugin_version)(void);
  34
  35         if (module_params == NULL) {
  36                 DEBUG(0, ("The plugin module needs an argument!\n"));
  37                 return NT_STATUS_UNSUCCESSFUL;
  38         }
  39
  40         plugin_name = smb_xstrdup(module_params);
  41         p = strchr(plugin_name, ':');
  42         if (p) {
  43                 *p = 0;
  44                 plugin_params = p+1;
  45                 trim_string(plugin_params, " ", " ");
  46         } else plugin_params = NULL;
  47         trim_string(plugin_name, " ", " ");
  48
  49         DEBUG(5, ("Trying to load sam plugin %s\n", plugin_name));
  50         dl_handle = sys_dlopen(plugin_name, RTLD_NOW);
  51         if (!dl_handle) {
  52                 DEBUG(0, ("Failed to load sam plugin %s using sys_dlopen (%s)\n", plugin_name, sys_dlerror()));
  53                 return NT_STATUS_UNSUCCESSFUL;
  54         }
  55
  56         plugin_version = sys_dlsym(dl_handle, "sam_version");
  57         if (!plugin_version) {
  58                 sys_dlclose(dl_handle);
  59                 DEBUG(0, ("Failed to find function 'sam_version' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));
  60                 return NT_STATUS_UNSUCCESSFUL;
  61         }
  62
  63         if (plugin_version()!=SAM_INTERFACE_VERSION) {
  64                 sys_dlclose(dl_handle);
  65                 DEBUG(0, ("Wrong SAM_INTERFACE_VERSION! sam plugin has version %d and version %d is needed! Please update!\n",
  66                             plugin_version(),SAM_INTERFACE_VERSION));
  67                 return NT_STATUS_UNSUCCESSFUL;
  68         }
  69
  70         plugin_init = sys_dlsym(dl_handle, "sam_init");
  71         if (!plugin_init) {
  72                 sys_dlclose(dl_handle);
  73                 DEBUG(0, ("Failed to find function 'sam_init' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));
  74                 return NT_STATUS_UNSUCCESSFUL;
  75         }
  76
  77         DEBUG(5, ("Starting sam plugin %s with parameters %s for domain %s\n", plugin_name, plugin_params, sam_methods->domain_name));
  78         return plugin_init(sam_methods, plugin_params);
  79 }