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/>.
26 /* Load a dynamic module. Only log a level 0 error if we are not checking
27 for the existence of a module (probling). */
29 static NTSTATUS
do_smb_load_module(const char *module_name
, BOOL is_probe
)
32 init_module_function
*init
;
36 /* Always try to use LAZY symbol resolving; if the plugin has
37 * backwards compatibility, there might be symbols in the
38 * plugin referencing to old (removed) functions
40 handle
= sys_dlopen(module_name
, RTLD_LAZY
);
42 /* This call should reset any possible non-fatal errors that
43 occured since last call to dl* functions */
44 error
= sys_dlerror();
47 int level
= is_probe
? 3 : 0;
48 DEBUG(level
, ("Error loading module '%s': %s\n", module_name
, error
? error
: ""));
49 return NT_STATUS_UNSUCCESSFUL
;
52 init
= (init_module_function
*)sys_dlsym(handle
, "init_module");
54 /* we must check sys_dlerror() to determine if it worked, because
55 sys_dlsym() can validly return NULL */
56 error
= sys_dlerror();
58 DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n",
60 return NT_STATUS_UNSUCCESSFUL
;
63 DEBUG(2, ("Module '%s' loaded\n", module_name
));
66 if (!NT_STATUS_IS_OK(status
)) {
67 DEBUG(0, ("Module '%s' initialization failed: %s\n",
68 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
,
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 #else /* HAVE_DLOPEN */
138 NTSTATUS
smb_load_module(const char *module_name
)
140 DEBUG(0,("This samba executable has not been built with plugin support\n"));
141 return NT_STATUS_NOT_SUPPORTED
;
144 int smb_load_modules(const char **modules
)
146 DEBUG(0,("This samba executable has not been built with plugin support\n"));
150 NTSTATUS
smb_probe_module(const char *subsystem
, const char *module
)
152 DEBUG(0,("This samba executable has not been built with plugin support, not probing\n"));
153 return NT_STATUS_NOT_SUPPORTED
;
156 #endif /* HAVE_DLOPEN */
158 void init_modules(void)
160 /* FIXME: This can cause undefined symbol errors :
161 * smb_register_vfs() isn't available in nmbd, for example */
162 if(lp_preload_modules())
163 smb_load_modules(lp_preload_modules());