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 DEBUG(level
, ("Error loading module '%s': %s\n", module_name
,
48 return NT_STATUS_UNSUCCESSFUL
;
51 init
= (init_module_function
*)sys_dlsym(handle
, "init_module");
53 /* we must check sys_dlerror() to determine if it worked, because
54 sys_dlsym() can validly return NULL */
55 error
= sys_dlerror();
57 DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n",
59 return NT_STATUS_UNSUCCESSFUL
;
64 DEBUG(2, ("Module '%s' loaded\n", module_name
));
69 NTSTATUS
smb_load_module(const char *module_name
)
71 return do_smb_load_module(module_name
, False
);
74 /* Load all modules in list and return number of
75 * modules that has been successfully loaded */
76 int smb_load_modules(const char **modules
)
81 for(i
= 0; modules
[i
]; i
++){
82 if(NT_STATUS_IS_OK(smb_load_module(modules
[i
]))) {
87 DEBUG(2, ("%d modules successfully loaded\n", success
));
92 NTSTATUS
smb_probe_module(const char *subsystem
, const char *module
)
96 /* Check for absolute path */
98 /* if we make any 'samba multibyte string'
100 for loading string modules */
102 DEBUG(5, ("Probing module '%s'\n", module
));
104 if (module
[0] == '/')
105 return do_smb_load_module(module
, True
);
107 pstrcpy(full_path
, lib_path(subsystem
));
108 pstrcat(full_path
, "/");
109 pstrcat(full_path
, module
);
110 pstrcat(full_path
, ".");
111 pstrcat(full_path
, shlib_ext());
113 DEBUG(5, ("Probing module '%s': Trying to load from %s\n", module
, full_path
));
115 return do_smb_load_module(full_path
, True
);
118 #else /* HAVE_DLOPEN */
120 NTSTATUS
smb_load_module(const char *module_name
)
122 DEBUG(0,("This samba executable has not been built with plugin support\n"));
123 return NT_STATUS_NOT_SUPPORTED
;
126 int smb_load_modules(const char **modules
)
128 DEBUG(0,("This samba executable has not been built with plugin support\n"));
132 NTSTATUS
smb_probe_module(const char *subsystem
, const char *module
)
134 DEBUG(0,("This samba executable has not been built with plugin support, not probing\n"));
135 return NT_STATUS_NOT_SUPPORTED
;
138 #endif /* HAVE_DLOPEN */
140 void init_modules(void)
142 /* FIXME: This can cause undefined symbol errors :
143 * smb_register_vfs() isn't available in nmbd, for example */
144 if(lp_preload_modules())
145 smb_load_modules(lp_preload_modules());
149 /***************************************************************************
150 * This Function registers a idle event
152 * the registered funtions are run periodically
153 * and maybe shutdown idle connections (e.g. to an LDAP server)
154 ***************************************************************************/
155 static smb_event_id_t smb_idle_event_id
= 1;
157 struct smb_idle_list_ent
{
158 struct smb_idle_list_ent
*prev
,*next
;
160 smb_idle_event_fn
*fn
;
166 static struct smb_idle_list_ent
*smb_idle_event_list
= NULL
;
168 smb_event_id_t
smb_register_idle_event(smb_idle_event_fn
*fn
, void *data
, time_t interval
)
170 struct smb_idle_list_ent
*event
;
173 return SMB_EVENT_ID_INVALID
;
176 event
= (struct smb_idle_list_ent
*)malloc(sizeof(struct smb_idle_list_ent
));
178 DEBUG(0,("malloc() failed!\n"));
179 return SMB_EVENT_ID_INVALID
;
183 event
->interval
= interval
;
185 event
->id
= smb_idle_event_id
++;
187 DLIST_ADD(smb_idle_event_list
,event
);
192 BOOL
smb_unregister_idle_event(smb_event_id_t id
)
194 struct smb_idle_list_ent
*event
= smb_idle_event_list
;
197 if (event
->id
== id
) {
198 DLIST_REMOVE(smb_idle_event_list
,event
);
208 void smb_run_idle_events(time_t now
)
210 struct smb_idle_list_ent
*event
= smb_idle_event_list
;
215 if (event
->interval
>= SMB_IDLE_EVENT_MIN_INTERVAL
) {
216 interval
= event
->interval
;
218 interval
= SMB_IDLE_EVENT_MIN_INTERVAL
;
220 if (now
>(event
->lastrun
+interval
)) {
221 event
->fn(&event
->data
,&event
->interval
,now
);
222 event
->lastrun
= now
;
230 /***************************************************************************
231 * This Function registers a exit event
233 * the registered functions are run on exit()
234 * and maybe shutdown idle connections (e.g. to an LDAP server)
235 ***************************************************************************/
237 struct smb_exit_list_ent
{
238 struct smb_exit_list_ent
*prev
,*next
;
240 smb_exit_event_fn
*fn
;
244 static struct smb_exit_list_ent
*smb_exit_event_list
= NULL
;
246 smb_event_id_t
smb_register_exit_event(smb_exit_event_fn
*fn
, void *data
)
248 struct smb_exit_list_ent
*event
;
249 static smb_event_id_t smb_exit_event_id
= 1;
252 return SMB_EVENT_ID_INVALID
;
255 event
= (struct smb_exit_list_ent
*)malloc(sizeof(struct smb_exit_list_ent
));
257 DEBUG(0,("malloc() failed!\n"));
258 return SMB_EVENT_ID_INVALID
;
262 event
->id
= smb_exit_event_id
++;
264 DLIST_ADD(smb_exit_event_list
,event
);
269 BOOL
smb_unregister_exit_event(smb_event_id_t id
)
271 struct smb_exit_list_ent
*event
= smb_exit_event_list
;
274 if (event
->id
== id
) {
275 DLIST_REMOVE(smb_exit_event_list
,event
);
285 void smb_run_exit_events(void)
287 struct smb_exit_list_ent
*event
= smb_exit_event_list
;
288 struct smb_exit_list_ent
*tmp
= NULL
;
291 event
->fn(&event
->data
);
294 /* exit event should only run one time :-)*/
298 /* the list is empty now...*/
299 smb_exit_event_list
= NULL
;