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.
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);
44 int level = is_probe ? 3 : 0;
45 error = sys_dlerror();
46 DEBUG(level, ("Error loading module '%s': %s\n", module_name, error ? error : ""));
47 return NT_STATUS_UNSUCCESSFUL;
50 init = (init_module_function *)sys_dlsym(handle, "init_module");
52 /* we must check sys_dlerror() to determine if it worked, because
53 sys_dlsym() can validly return NULL */
54 error = sys_dlerror();
56 DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n",
58 return NT_STATUS_UNSUCCESSFUL;
63 DEBUG(2, ("Module '%s' loaded\n", module_name));
68 NTSTATUS smb_load_module(const char *module_name)
70 return do_smb_load_module(module_name, False);
73 /* Load all modules in list and return number of
74 * modules that has been successfully loaded */
75 int smb_load_modules(const char **modules)
80 for(i = 0; modules[i]; i++){
81 if(NT_STATUS_IS_OK(smb_load_module(modules[i]))) {
86 DEBUG(2, ("%d modules successfully loaded\n", success));
91 NTSTATUS smb_probe_module(const char *subsystem, const char *module)
95 /* Check for absolute path */
97 /* if we make any 'samba multibyte string'
99 for loading string modules */
101 DEBUG(5, ("Probing module '%s'\n", module));
103 if (module[0] == '/')
104 return do_smb_load_module(module, True);
106 pstrcpy(full_path, lib_path(subsystem));
107 pstrcat(full_path, "/");
108 pstrcat(full_path, module);
109 pstrcat(full_path, ".");
110 pstrcat(full_path, shlib_ext());
112 DEBUG(5, ("Probing module '%s': Trying to load from %s\n", module, full_path));
114 return do_smb_load_module(full_path, True);
117 #else /* HAVE_DLOPEN */
119 NTSTATUS smb_load_module(const char *module_name)
121 DEBUG(0,("This samba executable has not been built with plugin support\n"));
122 return NT_STATUS_NOT_SUPPORTED;
125 int smb_load_modules(const char **modules)
127 DEBUG(0,("This samba executable has not been built with plugin support\n"));
131 NTSTATUS smb_probe_module(const char *subsystem, const char *module)
133 DEBUG(0,("This samba executable has not been built with plugin support, not probing\n"));
134 return NT_STATUS_NOT_SUPPORTED;
137 #endif /* HAVE_DLOPEN */
139 void init_modules(void)
141 /* FIXME: This can cause undefined symbol errors :
142 * smb_register_vfs() isn't available in nmbd, for example */
143 if(lp_preload_modules())
144 smb_load_modules(lp_preload_modules());
148 /***************************************************************************
149 * This Function registers a idle event
151 * the registered funtions are run periodically
152 * and maybe shutdown idle connections (e.g. to an LDAP server)
153 ***************************************************************************/
154 static smb_event_id_t smb_idle_event_id = 1;
156 struct smb_idle_list_ent {
157 struct smb_idle_list_ent *prev,*next;
159 smb_idle_event_fn *fn;
165 static struct smb_idle_list_ent *smb_idle_event_list = NULL;
167 smb_event_id_t smb_register_idle_event(smb_idle_event_fn *fn, void *data, time_t interval)
169 struct smb_idle_list_ent *event;
172 return SMB_EVENT_ID_INVALID;
175 event = (struct smb_idle_list_ent *)malloc(sizeof(struct smb_idle_list_ent));
177 DEBUG(0,("malloc() failed!\n"));
178 return SMB_EVENT_ID_INVALID;
182 event->interval = interval;
184 event->id = smb_idle_event_id++;
186 DLIST_ADD(smb_idle_event_list,event);
191 BOOL smb_unregister_idle_event(smb_event_id_t id)
193 struct smb_idle_list_ent *event = smb_idle_event_list;
196 if (event->id == id) {
197 DLIST_REMOVE(smb_idle_event_list,event);
207 void smb_run_idle_events(time_t now)
209 struct smb_idle_list_ent *event = smb_idle_event_list;
212 struct smb_idle_list_ent *next = event->next;
215 if (event->interval <= 0) {
216 interval = SMB_IDLE_EVENT_DEFAULT_INTERVAL;
217 } else if (event->interval >= SMB_IDLE_EVENT_MIN_INTERVAL) {
218 interval = event->interval;
220 interval = SMB_IDLE_EVENT_MIN_INTERVAL;
222 if (now >(event->lastrun+interval)) {
223 event->lastrun = now;
224 event->fn(&event->data,&event->interval,now);
232 /***************************************************************************
233 * This Function registers a exit event
235 * the registered functions are run on exit()
236 * and maybe shutdown idle connections (e.g. to an LDAP server)
237 ***************************************************************************/
239 struct smb_exit_list_ent {
240 struct smb_exit_list_ent *prev,*next;
242 smb_exit_event_fn *fn;
246 static struct smb_exit_list_ent *smb_exit_event_list = NULL;
248 smb_event_id_t smb_register_exit_event(smb_exit_event_fn *fn, void *data)
250 struct smb_exit_list_ent *event;
251 static smb_event_id_t smb_exit_event_id = 1;
254 return SMB_EVENT_ID_INVALID;
257 event = (struct smb_exit_list_ent *)malloc(sizeof(struct smb_exit_list_ent));
259 DEBUG(0,("malloc() failed!\n"));
260 return SMB_EVENT_ID_INVALID;
264 event->id = smb_exit_event_id++;
266 DLIST_ADD(smb_exit_event_list,event);
271 BOOL smb_unregister_exit_event(smb_event_id_t id)
273 struct smb_exit_list_ent *event = smb_exit_event_list;
276 if (event->id == id) {
277 DLIST_REMOVE(smb_exit_event_list,event);
287 void smb_run_exit_events(void)
289 struct smb_exit_list_ent *event = smb_exit_event_list;
290 struct smb_exit_list_ent *tmp = NULL;
293 event->fn(&event->data);
296 /* exit event should only run one time :-)*/
300 /* the list is empty now...*/
301 smb_exit_event_list = NULL;