Unix SMB/CIFS implementation.
module loading system
- Copyright (C) Jelmer Vernooij 2002
+ Copyright (C) Jelmer Vernooij 2002-2003
+ Copyright (C) Stefan (metze) Metzmacher 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
#include "includes.h"
#ifdef HAVE_DLOPEN
-NTSTATUS smb_load_module(const char *module_name)
+
+/* Load a dynamic module. Only log a level 0 error if we are not checking
+ for the existence of a module (probling). */
+
+static NTSTATUS do_smb_load_module(const char *module_name, BOOL is_probe)
{
void *handle;
init_module_function *init;
- NTSTATUS nt_status;
+ NTSTATUS status;
const char *error;
/* Always try to use LAZY symbol resolving; if the plugin has
*/
handle = sys_dlopen(module_name, RTLD_LAZY);
+ /* This call should reset any possible non-fatal errors that
+ occured since last call to dl* functions */
+ error = sys_dlerror();
+
if(!handle) {
- DEBUG(0, ("Error loading module '%s': %s\n", module_name, sys_dlerror()));
+ int level = is_probe ? 3 : 0;
+ DEBUG(level, ("Error loading module '%s': %s\n", module_name, error ? error : ""));
return NT_STATUS_UNSUCCESSFUL;
}
- init = sys_dlsym(handle, "init_module");
+ init = (init_module_function *)sys_dlsym(handle, "init_module");
/* we must check sys_dlerror() to determine if it worked, because
sys_dlsym() can validly return NULL */
error = sys_dlerror();
if (error) {
- DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n", module_name, error));
+ DEBUG(0, ("Error trying to resolve symbol 'init_module' in %s: %s\n",
+ module_name, error));
return NT_STATUS_UNSUCCESSFUL;
}
- nt_status = init();
-
DEBUG(2, ("Module '%s' loaded\n", module_name));
- return nt_status;
+ status = init();
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Module '%s' initialization failed: %s\n",
+ module_name, get_friendly_nt_error_msg(status)));
+ }
+
+ return status;
+}
+
+NTSTATUS smb_load_module(const char *module_name)
+{
+ return do_smb_load_module(module_name, False);
}
/* Load all modules in list and return number of
return success;
}
+NTSTATUS smb_probe_module(const char *subsystem, const char *module)
+{
+ pstring full_path;
+
+ /* Check for absolute path */
+
+ /* if we make any 'samba multibyte string'
+ calls here, we break
+ for loading string modules */
+
+ DEBUG(5, ("Probing module '%s'\n", module));
+
+ if (module[0] == '/')
+ return do_smb_load_module(module, True);
+
+ pstrcpy(full_path, lib_path(subsystem));
+ pstrcat(full_path, "/");
+ pstrcat(full_path, module);
+ pstrcat(full_path, ".");
+ pstrcat(full_path, shlib_ext());
+
+ DEBUG(5, ("Probing module '%s': Trying to load from %s\n", module, full_path));
+
+ return do_smb_load_module(full_path, True);
+}
+
#else /* HAVE_DLOPEN */
NTSTATUS smb_load_module(const char *module_name)
{
- DEBUG(0,("This samba executable has not been build with plugin support"));
+ DEBUG(0,("This samba executable has not been built with plugin support\n"));
return NT_STATUS_NOT_SUPPORTED;
}
int smb_load_modules(const char **modules)
{
- DEBUG(0,("This samba executable has not been build with plugin support"));
+ DEBUG(0,("This samba executable has not been built with plugin support\n"));
return -1;
}
+NTSTATUS smb_probe_module(const char *subsystem, const char *module)
+{
+ DEBUG(0,("This samba executable has not been built with plugin support, not probing\n"));
+ return NT_STATUS_NOT_SUPPORTED;
+}
+
#endif /* HAVE_DLOPEN */
+
+void init_modules(void)
+{
+ /* FIXME: This can cause undefined symbol errors :
+ * smb_register_vfs() isn't available in nmbd, for example */
+ if(lp_preload_modules())
+ smb_load_modules(lp_preload_modules());
+}