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 2 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.
26 NTSTATUS smb_load_module(const char *module_name)
29 init_module_function *init;
33 /* Always try to use LAZY symbol resolving; if the plugin has
34 * backwards compatibility, there might be symbols in the
35 * plugin referencing to old (removed) functions
37 handle = sys_dlopen(module_name, RTLD_LAZY);
40 DEBUG(0, ("Error loading module '%s': %s\n", module_name, sys_dlerror()));
41 return NT_STATUS_UNSUCCESSFUL;
44 init = sys_dlsym(handle, "init_module");
46 /* we must check sys_dlerror() to determine if it worked, because
47 sys_dlsym() can validly return NULL */
48 error = sys_dlerror();
50 DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n", module_name, error));
51 return NT_STATUS_UNSUCCESSFUL;
56 DEBUG(2, ("Module '%s' loaded\n", module_name));
61 /* Load all modules in list and return number of
62 * modules that has been successfully loaded */
63 int smb_load_modules(const char **modules)
68 for(i = 0; modules[i]; i++){
69 if(NT_STATUS_IS_OK(smb_load_module(modules[i]))) {
74 DEBUG(2, ("%d modules successfully loaded\n", success));
79 NTSTATUS smb_probe_module(const char *subsystem, const char *module)
83 /* Check for absolute path */
85 /* if we make any 'samba multibyte string'
87 for loading string modules */
89 return smb_load_module(module);
91 pstrcpy(full_path, lib_path(subsystem));
92 pstrcat(full_path, "/");
93 pstrcat(full_path, module);
94 pstrcat(full_path, ".");
95 pstrcat(full_path, shlib_ext());
97 DEBUG(5, ("Probing module %s: Trying to load from %s\n", module, full_path));
99 return smb_load_module(full_path);
102 #else /* HAVE_DLOPEN */
104 NTSTATUS smb_load_module(const char *module_name)
106 DEBUG(0,("This samba executable has not been built with plugin support\n"));
107 return NT_STATUS_NOT_SUPPORTED;
110 int smb_load_modules(const char **modules)
112 DEBUG(0,("This samba executable has not been built with plugin support\n"));
116 NTSTATUS smb_probe_module(const char *subsystem, const char *module)
118 DEBUG(0,("This samba executable has not been built with plugin support, not probing\n"));
119 return NT_STATUS_NOT_SUPPORTED;
122 #endif /* HAVE_DLOPEN */
124 void init_modules(void)
126 /* FIXME: This can cause undefined symbol errors :
127 * smb_register_vfs() isn't available in nmbd, for example */
128 if(lp_preload_modules())
129 smb_load_modules(lp_preload_modules());
133 /***************************************************************************
134 * This Function registers a idle event
136 * the registered funtions are run periodically
137 * and maybe shutdown idle connections (e.g. to an LDAP server)
138 ***************************************************************************/
139 static smb_event_id_t smb_idle_event_id = 1;
141 struct smb_idle_list_ent {
142 struct smb_idle_list_ent *prev,*next;
144 smb_idle_event_fn *fn;
150 static struct smb_idle_list_ent *smb_idle_event_list = NULL;
152 smb_event_id_t smb_register_idle_event(smb_idle_event_fn *fn, void *data, time_t interval)
154 struct smb_idle_list_ent *event;
157 return SMB_EVENT_ID_INVALID;
160 event = (struct smb_idle_list_ent *)malloc(sizeof(struct smb_idle_list_ent));
162 DEBUG(0,("malloc() failed!\n"));
163 return SMB_EVENT_ID_INVALID;
167 event->interval = interval;
169 event->id = smb_idle_event_id++;
171 DLIST_ADD(smb_idle_event_list,event);
176 BOOL smb_unregister_idle_event(smb_event_id_t id)
178 struct smb_idle_list_ent *event = smb_idle_event_list;
181 if (event->id == id) {
182 DLIST_REMOVE(smb_idle_event_list,event);
192 void smb_run_idle_events(time_t now)
194 struct smb_idle_list_ent *event = smb_idle_event_list;
199 if (event->interval >= SMB_IDLE_EVENT_MIN_INTERVAL) {
200 interval = event->interval;
202 interval = SMB_IDLE_EVENT_MIN_INTERVAL;
204 if (now >(event->lastrun+interval)) {
205 event->fn(&event->data,&event->interval,now);
206 event->lastrun = now;
214 /***************************************************************************
215 * This Function registers a exit event
217 * the registered functions are run on exit()
218 * and maybe shutdown idle connections (e.g. to an LDAP server)
219 ***************************************************************************/
221 struct smb_exit_list_ent {
222 struct smb_exit_list_ent *prev,*next;
224 smb_exit_event_fn *fn;
228 static struct smb_exit_list_ent *smb_exit_event_list = NULL;
230 smb_event_id_t smb_register_exit_event(smb_exit_event_fn *fn, void *data)
232 struct smb_exit_list_ent *event;
233 static smb_event_id_t smb_exit_event_id = 1;
236 return SMB_EVENT_ID_INVALID;
239 event = (struct smb_exit_list_ent *)malloc(sizeof(struct smb_exit_list_ent));
241 DEBUG(0,("malloc() failed!\n"));
242 return SMB_EVENT_ID_INVALID;
246 event->id = smb_exit_event_id++;
248 DLIST_ADD(smb_exit_event_list,event);
253 BOOL smb_unregister_exit_event(smb_event_id_t id)
255 struct smb_exit_list_ent *event = smb_exit_event_list;
258 if (event->id == id) {
259 DLIST_REMOVE(smb_exit_event_list,event);
269 void smb_run_exit_events(void)
271 struct smb_exit_list_ent *event = smb_exit_event_list;
272 struct smb_exit_list_ent *tmp = NULL;
275 event->fn(&event->data);
278 /* exit event should only run one time :-)*/
282 /* the list is empty now...*/
283 smb_exit_event_list = NULL;