wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
@@ -0,0 +1,452 @@
|
||||
|
||||
/*
|
||||
ldb database library
|
||||
|
||||
Copyright (C) Simo Sorce 2004
|
||||
|
||||
** NOTE! The following LGPL license applies to the ldb
|
||||
** library. This does NOT imply that all of Samba is released
|
||||
** under the LGPL
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
/*
|
||||
* Name: ldb
|
||||
*
|
||||
* Component: ldb modules core
|
||||
*
|
||||
* Description: core modules routines
|
||||
*
|
||||
* Author: Simo Sorce
|
||||
*/
|
||||
|
||||
#include "includes.h"
|
||||
#include "ldb/include/includes.h"
|
||||
|
||||
#if (_SAMBA_BUILD_ >= 4)
|
||||
#include "build.h"
|
||||
#include "dynconfig.h"
|
||||
#endif
|
||||
|
||||
#define LDB_MODULE_PREFIX "modules:"
|
||||
#define LDB_MODULE_PREFIX_LEN 8
|
||||
|
||||
static char *ldb_modules_strdup_no_spaces(TALLOC_CTX *mem_ctx, const char *string)
|
||||
{
|
||||
int i, len;
|
||||
char *trimmed;
|
||||
|
||||
trimmed = talloc_strdup(mem_ctx, string);
|
||||
if (!trimmed) {
|
||||
return NULL;
|
||||
}
|
||||
|
||||
len = strlen(trimmed);
|
||||
for (i = 0; trimmed[i] != '\0'; i++) {
|
||||
switch (trimmed[i]) {
|
||||
case ' ':
|
||||
case '\t':
|
||||
case '\n':
|
||||
memmove(&trimmed[i], &trimmed[i + 1], len -i -1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return trimmed;
|
||||
}
|
||||
|
||||
|
||||
/* modules are called in inverse order on the stack.
|
||||
Lets place them as an admin would think the right order is.
|
||||
Modules order is important */
|
||||
const char **ldb_modules_list_from_string(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, const char *string)
|
||||
{
|
||||
char **modules = NULL;
|
||||
const char **m;
|
||||
char *modstr, *p;
|
||||
int i;
|
||||
|
||||
/* spaces not admitted */
|
||||
modstr = ldb_modules_strdup_no_spaces(mem_ctx, string);
|
||||
if ( ! modstr) {
|
||||
ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in ldb_modules_strdup_no_spaces()\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
modules = talloc_realloc(mem_ctx, modules, char *, 2);
|
||||
if ( ! modules ) {
|
||||
ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in ldb_modules_list_from_string()\n");
|
||||
talloc_free(modstr);
|
||||
return NULL;
|
||||
}
|
||||
talloc_steal(modules, modstr);
|
||||
|
||||
i = 0;
|
||||
/* The str*r*chr walks backwards: This is how we get the inverse order mentioned above */
|
||||
while ((p = strrchr(modstr, ',')) != NULL) {
|
||||
*p = '\0';
|
||||
p++;
|
||||
modules[i] = p;
|
||||
|
||||
i++;
|
||||
modules = talloc_realloc(mem_ctx, modules, char *, i + 2);
|
||||
if ( ! modules ) {
|
||||
ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in ldb_modules_list_from_string()\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
}
|
||||
modules[i] = modstr;
|
||||
|
||||
modules[i + 1] = NULL;
|
||||
|
||||
m = (const char **)modules;
|
||||
|
||||
return m;
|
||||
}
|
||||
|
||||
static struct ops_list_entry {
|
||||
const struct ldb_module_ops *ops;
|
||||
struct ops_list_entry *next;
|
||||
} *registered_modules = NULL;
|
||||
|
||||
static const struct ldb_module_ops *ldb_find_module_ops(const char *name)
|
||||
{
|
||||
struct ops_list_entry *e;
|
||||
|
||||
for (e = registered_modules; e; e = e->next) {
|
||||
if (strcmp(e->ops->name, name) == 0)
|
||||
return e->ops;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#ifndef STATIC_ldb_MODULES
|
||||
|
||||
#ifdef HAVE_LDB_LDAP
|
||||
#define LDAP_INIT ldb_ldap_init,
|
||||
#else
|
||||
#define LDAP_INIT
|
||||
#endif
|
||||
|
||||
#ifdef HAVE_LDB_SQLITE3
|
||||
#define SQLITE3_INIT ldb_sqlite3_init,
|
||||
#else
|
||||
#define SQLITE3_INIT
|
||||
#endif
|
||||
|
||||
#define STATIC_ldb_MODULES \
|
||||
{ \
|
||||
LDAP_INIT \
|
||||
SQLITE3_INIT \
|
||||
ldb_tdb_init, \
|
||||
ldb_operational_init, \
|
||||
ldb_rdn_name_init, \
|
||||
ldb_objectclass_init, \
|
||||
ldb_paged_results_init, \
|
||||
ldb_sort_init, \
|
||||
ldb_asq_init, \
|
||||
NULL \
|
||||
}
|
||||
#endif
|
||||
|
||||
int ldb_global_init(void)
|
||||
{
|
||||
static int (*static_init_fns[])(void) = STATIC_ldb_MODULES;
|
||||
|
||||
static int initialized = 0;
|
||||
int ret = 0, i;
|
||||
|
||||
if (initialized)
|
||||
return 0;
|
||||
|
||||
initialized = 1;
|
||||
|
||||
for (i = 0; static_init_fns[i]; i++) {
|
||||
if (static_init_fns[i]() == -1)
|
||||
ret = -1;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int ldb_register_module(const struct ldb_module_ops *ops)
|
||||
{
|
||||
struct ops_list_entry *entry = talloc(talloc_autofree_context(), struct ops_list_entry);
|
||||
|
||||
if (ldb_find_module_ops(ops->name) != NULL)
|
||||
return -1;
|
||||
|
||||
if (entry == NULL)
|
||||
return -1;
|
||||
|
||||
entry->ops = ops;
|
||||
entry->next = registered_modules;
|
||||
registered_modules = entry;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ldb_try_load_dso(struct ldb_context *ldb, const char *name)
|
||||
{
|
||||
char *path;
|
||||
void *handle;
|
||||
int (*init_fn) (void);
|
||||
char *modulesdir;
|
||||
|
||||
#ifdef HAVE_DLOPEN
|
||||
if (getenv("LD_LDB_MODULE_PATH") != NULL) {
|
||||
modulesdir = talloc_strdup(ldb, getenv("LD_LDB_MODULE_PATH"));
|
||||
} else {
|
||||
#ifdef _SAMBA_BUILD_
|
||||
modulesdir = talloc_asprintf(ldb, "%s/ldb", dyn_MODULESDIR);
|
||||
#else
|
||||
modulesdir = talloc_strdup(ldb, MODULESDIR);
|
||||
#endif
|
||||
}
|
||||
|
||||
path = talloc_asprintf(ldb, "%s/%s.%s", modulesdir, name, SHLIBEXT);
|
||||
|
||||
talloc_free(modulesdir);
|
||||
|
||||
ldb_debug(ldb, LDB_DEBUG_TRACE, "trying to load %s from %s\n", name, path);
|
||||
|
||||
handle = dlopen(path, RTLD_NOW);
|
||||
if (handle == NULL) {
|
||||
ldb_debug(ldb, LDB_DEBUG_WARNING, "unable to load %s from %s: %s\n", name, path, dlerror());
|
||||
return -1;
|
||||
}
|
||||
|
||||
init_fn = (int (*)(void))dlsym(handle, "init_module");
|
||||
|
||||
if (init_fn == NULL) {
|
||||
ldb_debug(ldb, LDB_DEBUG_ERROR, "no symbol `init_module' found in %s: %s\n", path, dlerror());
|
||||
return -1;
|
||||
}
|
||||
|
||||
talloc_free(path);
|
||||
|
||||
return init_fn();
|
||||
#else
|
||||
ldb_debug(ldb, LDB_DEBUG_TRACE, "no dlopen() - not trying to load %s module\n", name);
|
||||
return -1;
|
||||
#endif
|
||||
}
|
||||
|
||||
int ldb_load_modules_list(struct ldb_context *ldb, const char **module_list, struct ldb_module *backend, struct ldb_module **out)
|
||||
{
|
||||
struct ldb_module *module;
|
||||
int i;
|
||||
|
||||
module = backend;
|
||||
|
||||
for (i = 0; module_list[i] != NULL; i++) {
|
||||
struct ldb_module *current;
|
||||
const struct ldb_module_ops *ops;
|
||||
|
||||
ops = ldb_find_module_ops(module_list[i]);
|
||||
if (ops == NULL) {
|
||||
if (ldb_try_load_dso(ldb, module_list[i]) == 0) {
|
||||
ops = ldb_find_module_ops(module_list[i]);
|
||||
}
|
||||
}
|
||||
|
||||
if (ops == NULL) {
|
||||
ldb_debug(ldb, LDB_DEBUG_WARNING, "WARNING: Module [%s] not found\n",
|
||||
module_list[i]);
|
||||
continue;
|
||||
}
|
||||
|
||||
current = talloc_zero(ldb, struct ldb_module);
|
||||
if (current == NULL) {
|
||||
return LDB_ERR_OPERATIONS_ERROR;
|
||||
}
|
||||
talloc_set_name(current, "ldb_module: %s", module_list[i]);
|
||||
|
||||
current->ldb = ldb;
|
||||
current->ops = ops;
|
||||
|
||||
DLIST_ADD(module, current);
|
||||
}
|
||||
*out = module;
|
||||
return LDB_SUCCESS;
|
||||
}
|
||||
|
||||
int ldb_init_module_chain(struct ldb_context *ldb, struct ldb_module *module)
|
||||
{
|
||||
while (module && module->ops->init_context == NULL)
|
||||
module = module->next;
|
||||
|
||||
if (module && module->ops->init_context &&
|
||||
module->ops->init_context(module) != LDB_SUCCESS) {
|
||||
ldb_debug(ldb, LDB_DEBUG_FATAL, "module initialization failed\n");
|
||||
return LDB_ERR_OPERATIONS_ERROR;
|
||||
}
|
||||
|
||||
return LDB_SUCCESS;
|
||||
}
|
||||
|
||||
int ldb_load_modules(struct ldb_context *ldb, const char *options[])
|
||||
{
|
||||
const char **modules = NULL;
|
||||
int i;
|
||||
int ret;
|
||||
TALLOC_CTX *mem_ctx = talloc_new(ldb);
|
||||
if (!mem_ctx) {
|
||||
return LDB_ERR_OPERATIONS_ERROR;
|
||||
}
|
||||
|
||||
/* find out which modules we are requested to activate */
|
||||
|
||||
/* check if we have a custom module list passd as ldb option */
|
||||
if (options) {
|
||||
for (i = 0; options[i] != NULL; i++) {
|
||||
if (strncmp(options[i], LDB_MODULE_PREFIX, LDB_MODULE_PREFIX_LEN) == 0) {
|
||||
modules = ldb_modules_list_from_string(ldb, mem_ctx, &options[i][LDB_MODULE_PREFIX_LEN]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* if not overloaded by options and the backend is not ldap try to load the modules list from ldb */
|
||||
if ((modules == NULL) && (strcmp("ldap", ldb->modules->ops->name) != 0)) {
|
||||
const char * const attrs[] = { "@LIST" , NULL};
|
||||
struct ldb_result *res = NULL;
|
||||
struct ldb_dn *mods_dn;
|
||||
|
||||
mods_dn = ldb_dn_new(mem_ctx, ldb, "@MODULES");
|
||||
if (mods_dn == NULL) {
|
||||
talloc_free(mem_ctx);
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = ldb_search(ldb, mods_dn, LDB_SCOPE_BASE, "", attrs, &res);
|
||||
talloc_steal(mods_dn, res);
|
||||
if (ret == LDB_SUCCESS && (res->count == 0 || res->msgs[0]->num_elements == 0)) {
|
||||
ldb_debug(ldb, LDB_DEBUG_TRACE, "no modules required by the db\n");
|
||||
} else {
|
||||
if (ret != LDB_SUCCESS) {
|
||||
ldb_debug(ldb, LDB_DEBUG_FATAL, "ldb error (%s) occurred searching for modules, bailing out\n", ldb_errstring(ldb));
|
||||
talloc_free(mem_ctx);
|
||||
return -1;
|
||||
}
|
||||
if (res->count > 1) {
|
||||
ldb_debug(ldb, LDB_DEBUG_FATAL, "Too many records found (%d), bailing out\n", res->count);
|
||||
talloc_free(mem_ctx);
|
||||
return -1;
|
||||
}
|
||||
|
||||
modules = ldb_modules_list_from_string(ldb, mem_ctx,
|
||||
(const char *)res->msgs[0]->elements[0].values[0].data);
|
||||
|
||||
}
|
||||
|
||||
talloc_free(mods_dn);
|
||||
}
|
||||
|
||||
if (modules != NULL) {
|
||||
ret = ldb_load_modules_list(ldb, modules, ldb->modules, &ldb->modules);
|
||||
talloc_free(modules);
|
||||
if (ret != LDB_SUCCESS) {
|
||||
return ret;
|
||||
}
|
||||
} else {
|
||||
ldb_debug(ldb, LDB_DEBUG_TRACE, "No modules specified for this database\n");
|
||||
}
|
||||
|
||||
return ldb_init_module_chain(ldb, ldb->modules);
|
||||
}
|
||||
|
||||
/*
|
||||
by using this we allow ldb modules to only implement the functions they care about,
|
||||
which makes writing a module simpler, and makes it more likely to keep working
|
||||
when ldb is extended
|
||||
*/
|
||||
#define FIND_OP(module, op) do { \
|
||||
struct ldb_context *ldb = module->ldb; \
|
||||
module = module->next; \
|
||||
while (module && module->ops->op == NULL) module = module->next; \
|
||||
if (module == NULL) { \
|
||||
ldb_asprintf_errstring(ldb, "Unable to find backend operation for " #op ); \
|
||||
return LDB_ERR_OPERATIONS_ERROR; \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
|
||||
/*
|
||||
helper functions to call the next module in chain
|
||||
*/
|
||||
|
||||
int ldb_next_request(struct ldb_module *module, struct ldb_request *request)
|
||||
{
|
||||
switch (request->operation) {
|
||||
case LDB_SEARCH:
|
||||
FIND_OP(module, search);
|
||||
return module->ops->search(module, request);
|
||||
case LDB_ADD:
|
||||
FIND_OP(module, add);
|
||||
return module->ops->add(module, request);
|
||||
case LDB_MODIFY:
|
||||
FIND_OP(module, modify);
|
||||
return module->ops->modify(module, request);
|
||||
case LDB_DELETE:
|
||||
FIND_OP(module, del);
|
||||
return module->ops->del(module, request);
|
||||
case LDB_RENAME:
|
||||
FIND_OP(module, rename);
|
||||
return module->ops->rename(module, request);
|
||||
case LDB_SEQUENCE_NUMBER:
|
||||
FIND_OP(module, sequence_number);
|
||||
return module->ops->sequence_number(module, request);
|
||||
default:
|
||||
FIND_OP(module, request);
|
||||
return module->ops->request(module, request);
|
||||
}
|
||||
}
|
||||
|
||||
int ldb_next_init(struct ldb_module *module)
|
||||
{
|
||||
/* init is different in that it is not an error if modules
|
||||
* do not require initialization */
|
||||
|
||||
module = module->next;
|
||||
|
||||
while (module && module->ops->init_context == NULL)
|
||||
module = module->next;
|
||||
|
||||
if (module == NULL)
|
||||
return LDB_SUCCESS;
|
||||
|
||||
return module->ops->init_context(module);
|
||||
}
|
||||
|
||||
int ldb_next_start_trans(struct ldb_module *module)
|
||||
{
|
||||
FIND_OP(module, start_transaction);
|
||||
return module->ops->start_transaction(module);
|
||||
}
|
||||
|
||||
int ldb_next_end_trans(struct ldb_module *module)
|
||||
{
|
||||
FIND_OP(module, end_transaction);
|
||||
return module->ops->end_transaction(module);
|
||||
}
|
||||
|
||||
int ldb_next_del_trans(struct ldb_module *module)
|
||||
{
|
||||
FIND_OP(module, del_transaction);
|
||||
return module->ops->del_transaction(module);
|
||||
}
|
||||
Reference in New Issue
Block a user