2 Unix SMB/CIFS implementation.
4 database wrap functions
6 Copyright (C) Andrew Tridgell 2004
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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 the stupidity of the unix fcntl locking design forces us to never
25 allow a database file to be opened twice in the same process. These
26 wrappers provide convenient access to a tdb or ldb, taking advantage
27 of talloc destructors to ensure that only a single open is done
31 #include "lib/util/dlinklist.h"
32 #include "lib/events/events.h"
33 #include "lib/tdb/include/tdb.h"
34 #include "lib/ldb/include/ldb.h"
35 #include "lib/ldb/include/ldb_errors.h"
36 #include "lib/ldb/samba/ldif_handlers.h"
39 static struct tdb_wrap *tdb_list;
42 this is used to catch debug messages from ldb
44 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
45 const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
47 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
48 const char *fmt, va_list ap)
51 if (DEBUGLEVEL < 4 && level > LDB_DEBUG_WARNING) {
54 if (DEBUGLEVEL < 2 && level > LDB_DEBUG_ERROR) {
57 vasprintf(&s, fmt, ap);
59 DEBUG(level, ("ldb: %s\n", s));
63 char *wrap_casefold(void *context, void *mem_ctx, const char *s)
65 return strupper_talloc(mem_ctx, s);
69 wrapped connection to a ldb database
70 to close just talloc_free() the returned ldb_context
72 TODO: We need an error_string parameter
74 struct ldb_context *ldb_wrap_connect(TALLOC_CTX *mem_ctx,
76 struct auth_session_info *session_info,
77 struct cli_credentials *credentials,
79 const char *options[])
81 struct ldb_context *ldb;
83 struct event_context *ev;
84 char *real_url = NULL;
86 ldb = ldb_init(mem_ctx);
91 /* we want to use the existing event context if possible. This
92 relies on the fact that in smbd, everything is a child of
93 the main event_context */
94 ev = event_context_find(ldb);
96 if (ldb_set_opaque(ldb, "EventContext", ev)) {
101 if (ldb_set_opaque(ldb, "sessionInfo", session_info)) {
106 if (ldb_set_opaque(ldb, "credentials", credentials)) {
111 ret = ldb_register_samba_handlers(ldb);
117 real_url = private_path(ldb, url);
118 if (real_url == NULL) {
123 /* allow admins to force non-sync ldb for all databases */
124 if (lp_parm_bool(-1, "ldb", "nosync", False)) {
125 flags |= LDB_FLG_NOSYNC;
128 ret = ldb_connect(ldb, real_url, flags, options);
129 if (ret != LDB_SUCCESS) {
134 talloc_free(real_url);
136 ldb_set_debug(ldb, ldb_wrap_debug, NULL);
138 ldb_set_utf8_fns(ldb, NULL, wrap_casefold);
145 Log tdb messages via DEBUG().
147 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
148 const char *format, ...) PRINTF_ATTRIBUTE(3,4);
150 static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
151 const char *format, ...)
157 va_start(ap, format);
158 vasprintf(&ptr, format, ap);
162 case TDB_DEBUG_FATAL:
165 case TDB_DEBUG_ERROR:
168 case TDB_DEBUG_WARNING:
171 case TDB_DEBUG_TRACE:
179 const char *name = tdb_name(tdb);
180 DEBUG(debug_level, ("tdb(%s): %s", name ? name : "unnamed", ptr));
186 /* destroy the last connection to a tdb */
187 static int tdb_wrap_destructor(struct tdb_wrap *w)
190 DLIST_REMOVE(tdb_list, w);
195 wrapped connection to a tdb database
196 to close just talloc_free() the tdb_wrap pointer
198 struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
199 const char *name, int hash_size, int tdb_flags,
200 int open_flags, mode_t mode)
203 struct tdb_logging_context log_ctx;
204 log_ctx.log_fn = tdb_wrap_log;
206 for (w=tdb_list;w;w=w->next) {
207 if (strcmp(name, w->name) == 0) {
208 return talloc_reference(mem_ctx, w);
212 w = talloc(mem_ctx, struct tdb_wrap);
217 w->name = talloc_strdup(w, name);
219 w->tdb = tdb_open_ex(name, hash_size, tdb_flags,
220 open_flags, mode, &log_ctx, NULL);
221 if (w->tdb == NULL) {
226 talloc_set_destructor(w, tdb_wrap_destructor);
228 DLIST_ADD(tdb_list, w);