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, see <http://www.gnu.org/licenses/>.
24 /* Load a dynamic module. Only log a level 0 error if we are not checking
25 for the existence of a module (probling). */
27 static NTSTATUS do_smb_load_module(const char *module_name, bool is_probe)
30 init_module_function *init;
34 /* Always try to use LAZY symbol resolving; if the plugin has
35 * backwards compatibility, there might be symbols in the
36 * plugin referencing to old (removed) functions
38 handle = dlopen(module_name, RTLD_LAZY);
40 /* This call should reset any possible non-fatal errors that
41 occured since last call to dl* functions */
45 int level = is_probe ? 3 : 0;
46 DEBUG(level, ("Error loading module '%s': %s\n", module_name, error ? error : ""));
47 return NT_STATUS_UNSUCCESSFUL;
50 init = (init_module_function *)dlsym(handle, "init_samba_module");
52 /* we must check dlerror() to determine if it worked, because
53 dlsym() can validly return NULL */
56 DEBUG(0, ("Error trying to resolve symbol 'init_samba_module' "
57 "in %s: %s\n", module_name, error));
59 return NT_STATUS_UNSUCCESSFUL;
62 DEBUG(2, ("Module '%s' loaded\n", module_name));
65 if (!NT_STATUS_IS_OK(status)) {
66 DEBUG(0, ("Module '%s' initialization failed: %s\n",
67 module_name, get_friendly_nt_error_msg(status)));
74 NTSTATUS smb_load_module(const char *module_name)
76 return do_smb_load_module(module_name, False);
79 /* Load all modules in list and return number of
80 * modules that has been successfully loaded */
81 int smb_load_modules(const char **modules)
86 for(i = 0; modules[i]; i++){
87 if(NT_STATUS_IS_OK(smb_load_module(modules[i]))) {
92 DEBUG(2, ("%d modules successfully loaded\n", success));
97 NTSTATUS smb_probe_module(const char *subsystem, const char *module)
99 char *full_path = NULL;
100 TALLOC_CTX *ctx = talloc_stackframe();
103 /* Check for absolute path */
105 /* if we make any 'samba multibyte string'
107 for loading string modules */
109 DEBUG(5, ("Probing module '%s'\n", module));
111 if (module[0] == '/') {
112 status = do_smb_load_module(module, True);
117 full_path = talloc_asprintf(ctx,
119 modules_path(ctx, subsystem),
124 return NT_STATUS_NO_MEMORY;
127 DEBUG(5, ("Probing module '%s': Trying to load from %s\n",
130 status = do_smb_load_module(full_path, True);
136 void init_modules(void)
138 /* FIXME: This can cause undefined symbol errors :
139 * smb_register_vfs() isn't available in nmbd, for example */
140 if(lp_preload_modules())
141 smb_load_modules(lp_preload_modules());