From 79ebe463e2aed9125c9086f6bff99adeef5e4b88 Mon Sep 17 00:00:00 2001 From: Simo Sorce Date: Mon, 15 Nov 2004 11:42:17 +0000 Subject: r3755: add missing files (This used to be commit 0b715b6ce21d23970d207d57e90133be17790d15) --- source4/lib/ldb/common/ldb_modules.c | 265 +++++++++++++++++++++++++++++++++++ 1 file changed, 265 insertions(+) create mode 100644 source4/lib/ldb/common/ldb_modules.c (limited to 'source4/lib/ldb/common/ldb_modules.c') diff --git a/source4/lib/ldb/common/ldb_modules.c b/source4/lib/ldb/common/ldb_modules.c new file mode 100644 index 0000000000..a7cfd81d46 --- /dev/null +++ b/source4/lib/ldb/common/ldb_modules.c @@ -0,0 +1,265 @@ + +/* + 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 "dlinklist.h" +#include +#include +#include + +#define LDB_MODULE_PREFIX "modules" +#define LDB_MODULE_PREFIX_LEN 7 +#define LDB_MODULE_SEP ':' + +int ldb_load_modules(struct ldb_context *ldb, const char *options[]) +{ + struct ldb_module *current; + char **modules; + char *p, *q; + int pn, i; + + /* find out which modules we are requested to activate */ + modules = NULL; + pn = 0; + + if (options) { + + for (i = 0; options[i] != NULL; i++) { + + if (strncmp(options[i], LDB_MODULE_PREFIX, LDB_MODULE_PREFIX_LEN) == 0) { + + p = q = ldb_strdup(ldb, &options[i][LDB_MODULE_PREFIX_LEN]); + if (*q != ':') { + ldb_free(ldb, q); + return -1; + } + do { + *p = '\0'; + q = p + 1; + pn++; + modules = ldb_realloc_array(ldb, modules, sizeof(char *), pn); + if (!modules) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in register_modules()\n"); + return -1; + } + modules[pn - 1] = q; + } while ((p = strchr(q, LDB_MODULE_SEP))); + } + } + } + + if (!modules) { /* no modules in the options, look for @MODULES in the db */ + int ret, j, k; + char * attrs[] = { "@MODULE" }; + struct ldb_message **msg; + + ret = ldb_search(ldb, "", LDB_SCOPE_BASE, "dn=@MODULES", (const char * const *)attrs, &msg); + if (ret == 0) { + ldb_debug(ldb, LDB_DEBUG_TRACE, "no modules required by the db\n"); + } else { + if (ret < 0) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "ldb error (%s) occurred searching for modules, bailing out\n", ldb_errstring(ldb)); + return -1; + } + if (ret > 1) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "Too many records found, bailing out\n"); + return -1; + } + + for (j = 0; j < msg[0]->num_elements; j++) { + for (k = 0; k < msg[0]->elements[j].num_values; k++) { + pn++; + modules = ldb_realloc_array(ldb, modules, sizeof(char *), pn); + if (!modules) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in register_modules()\n"); + return -1; + } + modules[pn - 1] = ldb_strndup(ldb, msg[0]->elements[j].values[k].data, msg[0]->elements[j].values[k].length); + if (!modules[pn - 1]) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "Out of Memory in register_modules()\n"); + return -1; + } + } + } + } + ldb_search_free(ldb, msg); + } + + if (modules) { + + for (i = 0; i < pn; i++) { + + if (strcmp(modules[i], "timestamps") == 0) { + current = timestamps_module_init(ldb, options); + if (!current) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "function 'init_module' in %s fails\n", modules[i]); + return -1; + } + DLIST_ADD(ldb->modules, current); + continue; + } +#if 0 + if (strcmp(modules[i], "schema") == 0) { + current = schema_module_init(ldb, options); + if (!current) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "function 'init_module' in %s fails\n", modules[i]); + return -1; + } + DLIST_ADD(ldb->modules, current); + continue; + } +#endif +#ifdef HAVE_DLOPEN_DISABLED + { + void *handle; + init_ldb_module_function init; + struct stat st; + const char *errstr; + + if (stat(modules[i], &st) < 0) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "Required module [%s] not found, bailing out!\n", modules[i]); + return -1; + } + + handle = dlopen(modules[i], RTLD_LAZY); + + if (!handle) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "Error loading module %s [%s]\n", modules[i], dlerror()); + return -1; + } + + init = (init_ldb_module_function)dlsym(handle, "init_module"); + + errstr = dlerror(); + if (errstr) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "Error trying to resolve symbol 'init_module' in %s [%s]\n", modules[i], errstr); + return -1; + } + + current = init(ldb, options); + if (!current) { + ldb_debug(ldb, LDB_DEBUG_FATAL, "function 'init_module' in %s fails\n", modules[i]); + return -1; + } + DLIST_ADD(ldb->modules, current); + } +#else + ldb_debug(ldb, LDB_DEBUG_FATAL, "Required module [%s] not found, bailing out!\n", modules[i]); + return -1; +#endif + } + } + + return 0; +} + +/* + helper functions to call the next module in chain +*/ +int ldb_next_close(struct ldb_module *module) +{ + if (!module->next) { + return -1; + } + return module->next->ops->close(module->next); +} + +int ldb_next_search(struct ldb_module *module, + const char *base, + enum ldb_scope scope, + const char *expression, + const char * const *attrs, struct ldb_message ***res) +{ + if (!module->next) { + return -1; + } + return module->next->ops->search(module->next, base, scope, expression, attrs, res); +} + +int ldb_next_search_free(struct ldb_module *module, struct ldb_message **msg) +{ + if (!module->next) { + return -1; + } + return module->next->ops->search_free(module->next, msg); +} + +int ldb_next_add_record(struct ldb_module *module, const struct ldb_message *message) +{ + if (!module->next) { + return -1; + } + return module->next->ops->add_record(module->next, message); +} + +int ldb_next_modify_record(struct ldb_module *module, const struct ldb_message *message) +{ + if (!module->next) { + return -1; + } + return module->next->ops->modify_record(module->next, message); +} + +int ldb_next_delete_record(struct ldb_module *module, const char *dn) +{ + if (!module->next) { + return -1; + } + return module->next->ops->delete_record(module->next, dn); +} + +int ldb_next_rename_record(struct ldb_module *module, const char *olddn, const char *newdn) +{ + if (!module->next) { + return -1; + } + return module->next->ops->rename_record(module->next, olddn, newdn); +} + +const char *ldb_next_errstring(struct ldb_module *module) +{ + if (!module->next) { + return NULL; + } + return module->next->ops->errstring(module->next); +} + +void ldb_next_cache_free(struct ldb_module *module) +{ + if (!module->next) { + return; + } + module->next->ops->cache_free(module->next); +} -- cgit