NTSTATUS pdb_init_plugin(PDB_CONTEXT *pdb_context, PDB_METHODS **pdb_method, const char *location)
{
void * dl_handle;
char *plugin_location, *plugin_name, *p;
pdb_init_function plugin_init;
int (*plugin_version)(void);
if (location == NULL) {
DEBUG(0, ("The plugin module needs an argument!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
plugin_name = smb_xstrdup(location);
p = strchr(plugin_name, ':');
if (p) {
*p = 0;
plugin_location = p+1;
trim_char(plugin_location, ' ', ' ');
} else {
plugin_location = NULL;
}
trim_char(plugin_name, ' ', ' ');
DEBUG(5, ("Trying to load sam plugin %s\n", plugin_name));
dl_handle = sys_dlopen(plugin_name, RTLD_NOW );
if (!dl_handle) {
DEBUG(0, ("Failed to load sam plugin %s using sys_dlopen (%s)\n", plugin_name, sys_dlerror()));
return NT_STATUS_UNSUCCESSFUL;
}
plugin_version = sys_dlsym(dl_handle, "pdb_version");
if (!plugin_version) {
sys_dlclose(dl_handle);
DEBUG(0, ("Failed to find function 'pdb_version' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));
return NT_STATUS_UNSUCCESSFUL;
}
if (plugin_version() != PASSDB_INTERFACE_VERSION) {
sys_dlclose(dl_handle);
DEBUG(0, ("Wrong PASSDB_INTERFACE_VERSION! sam plugin has version %d and version %d is needed! Please update!\n",
plugin_version(),PASSDB_INTERFACE_VERSION));
return NT_STATUS_UNSUCCESSFUL;
}
plugin_init = sys_dlsym(dl_handle, "pdb_init");
if (!plugin_init) {
sys_dlclose(dl_handle);
DEBUG(0, ("Failed to find function 'pdb_init' using sys_dlsym in sam plugin %s (%s)\n", plugin_name, sys_dlerror()));
return NT_STATUS_UNSUCCESSFUL;
}
DEBUG(5, ("Starting sam plugin %s with location %s\n", plugin_name, plugin_location));
return plugin_init(pdb_context, pdb_method, plugin_location);
}
static NTSTATUS do_smb_load_module(const char *module_name, bool is_probe)
{
void *handle;
init_module_function *init;
NTSTATUS status;
const char *error;
/* Always try to use LAZY symbol resolving; if the plugin has
* backwards compatibility, there might be symbols in the
* plugin referencing to old (removed) functions
*/
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) {
int level = is_probe ? 3 : 0;
DEBUG(level, ("Error loading module '%s': %s\n", module_name, error ? error : ""));
return NT_STATUS_UNSUCCESSFUL;
}
init = (init_module_function *)sys_dlsym(handle, "init_samba_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_samba_module' "
"in %s: %s\n", module_name, error));
sys_dlclose(handle);
return NT_STATUS_UNSUCCESSFUL;
}
DEBUG(2, ("Module '%s' loaded\n", module_name));
status = init();
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Module '%s' initialization failed: %s\n",
module_name, get_friendly_nt_error_msg(status)));
sys_dlclose(handle);
}
return status;
}
static void *find_fn(const char *name)
{
char s[1024];
static void *h;
void *res;
snprintf(s,sizeof(s), "_nss_%s_%s", nss_name, name);
if (!h) {
h = sys_dlopen(so_path, RTLD_LAZY);
}
if (!h) {
printf("Can't open shared library %s\n", so_path);
exit(1);
}
res = sys_dlsym(h, s);
if (!res) {
printf("Can't find function %s\n", s);
return NULL;
}
return res;
}
static void *find_fn(const char *name)
{
pstring s;
static void *h;
void *res;
pstr_sprintf(s, "_nss_%s_%s", nss_name, name);
if (!h) {
h = sys_dlopen(so_path, RTLD_LAZY);
}
if (!h) {
printf("Can't open shared library %s\n", so_path);
exit(1);
}
res = sys_dlsym(h, s);
if (!res) {
printf("Can't find function %s\n", s);
total_errors++;
return NULL;
}
return res;
}