2 Unix SMB/CIFS implementation.
5 Copyright (C) Jelmer Vernooij 2002-2003
6 Copyright (C) Stefan (metze) Metzmacher 2003
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 3 of the License, or
11 (at your option) any later version.
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.
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.
27 /* Load a dynamic module. Only log a level 0 error if we are not checking
28 for the existence of a module (probling). */
30 static NTSTATUS do_smb_load_module(const char *module_name, BOOL is_probe)
33 init_module_function *init;
37 /* Always try to use LAZY symbol resolving; if the plugin has
38 * backwards compatibility, there might be symbols in the
39 * plugin referencing to old (removed) functions
41 handle = sys_dlopen(module_name, RTLD_LAZY);
43 /* This call should reset any possible non-fatal errors that
44 occured since last call to dl* functions */
45 error = sys_dlerror();
48 int level = is_probe ? 3 : 0;
49 DEBUG(level, ("Error loading module '%s': %s\n", module_name, error ? error : ""));
50 return NT_STATUS_UNSUCCESSFUL;
53 init = (init_module_function *)sys_dlsym(handle, "init_module");
55 /* we must check sys_dlerror() to determine if it worked, because
56 sys_dlsym() can validly return NULL */
57 error = sys_dlerror();
59 DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n",
61 return NT_STATUS_UNSUCCESSFUL;
64 DEBUG(2, ("Module '%s' loaded\n", module_name));
67 if (!NT_STATUS_IS_OK(status)) {
68 DEBUG(0, ("Module '%s' initialization failed: %s\n",
69 module_name, get_friendly_nt_error_msg(status)));
75 NTSTATUS smb_load_module(const char *module_name)
77 return do_smb_load_module(module_name, False);
80 /* Load all modules in list and return number of
81 * modules that has been successfully loaded */
82 int smb_load_modules(const char **modules)
87 for(i = 0; modules[i]; i++){
88 if(NT_STATUS_IS_OK(smb_load_module(modules[i]))) {
93 DEBUG(2, ("%d modules successfully loaded\n", success));
98 NTSTATUS smb_probe_module(const char *subsystem, const char *module)
102 /* Check for absolute path */
104 /* if we make any 'samba multibyte string'
106 for loading string modules */
108 DEBUG(5, ("Probing module '%s'\n", module));
110 if (module[0] == '/')
111 return do_smb_load_module(module, True);
113 pstrcpy(full_path, lib_path(subsystem));
114 pstrcat(full_path, "/");
115 pstrcat(full_path, module);
116 pstrcat(full_path, ".");
117 pstrcat(full_path, shlib_ext());
119 DEBUG(5, ("Probing module '%s': Trying to load from %s\n", module, full_path));
121 return do_smb_load_module(full_path, True);
124 #else /* HAVE_DLOPEN */
126 NTSTATUS smb_load_module(const char *module_name)
128 DEBUG(0,("This samba executable has not been built with plugin support\n"));
129 return NT_STATUS_NOT_SUPPORTED;
132 int smb_load_modules(const char **modules)
134 DEBUG(0,("This samba executable has not been built with plugin support\n"));
138 NTSTATUS smb_probe_module(const char *subsystem, const char *module)
140 DEBUG(0,("This samba executable has not been built with plugin support, not probing\n"));
141 return NT_STATUS_NOT_SUPPORTED;
144 #endif /* HAVE_DLOPEN */
146 void init_modules(void)
148 /* FIXME: This can cause undefined symbol errors :
149 * smb_register_vfs() isn't available in nmbd, for example */
150 if(lp_preload_modules())
151 smb_load_modules(lp_preload_modules());