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 "dlinklist.h"
32 #include "lib/tdb/include/tdb.h"
33 #include "lib/ldb/include/ldb.h"
36 static struct tdb_wrap *tdb_list;
39 this is used to catch debug messages from ldb
41 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
42 const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
44 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
45 const char *fmt, va_list ap)
48 if (DEBUGLEVEL < 4 && level > LDB_DEBUG_WARNING) {
51 vasprintf(&s, fmt, ap);
53 DEBUG(level, ("ldb: %s\n", s));
58 wrapped connection to a ldb database
59 to close just talloc_free() the returned ldb_context
61 struct ldb_context *ldb_wrap_connect(TALLOC_CTX *mem_ctx,
64 const char *options[])
66 struct ldb_context *ldb;
68 struct event_context *ev;
69 char *real_url = NULL;
71 ldb = ldb_init(mem_ctx);
76 /* we want to use the existing event context if possible. This
77 relies on the fact that in smbd, everything is a child of
78 the main event_context */
79 ev = talloc_find_parent_bytype(mem_ctx, struct event_context);
81 ldb_set_opaque(ldb, "EventContext", ev);
83 DEBUG(5,("WARNING: event_context not found\n"));
86 ret = ldb_register_samba_handlers(ldb);
92 real_url = private_path(ldb, url);
93 if (real_url == NULL) {
98 ret = ldb_connect(ldb, real_url, flags, options);
104 talloc_free(real_url);
106 ldb_set_debug(ldb, ldb_wrap_debug, NULL);
113 Log tdb messages via DEBUG().
115 static void tdb_wrap_log(TDB_CONTEXT *tdb, int level,
116 const char *format, ...) PRINTF_ATTRIBUTE(3,4);
118 static void tdb_wrap_log(TDB_CONTEXT *tdb, int level,
119 const char *format, ...)
124 va_start(ap, format);
125 vasprintf(&ptr, format, ap);
129 DEBUG(level, ("tdb(%s): %s", tdb->name ? tdb->name : "unnamed", ptr));
135 /* destroy the last connection to a tdb */
136 static int tdb_wrap_destructor(void *ctx)
138 struct tdb_wrap *w = ctx;
140 DLIST_REMOVE(tdb_list, w);
145 wrapped connection to a tdb database
146 to close just talloc_free() the tdb_wrap pointer
148 struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
149 const char *name, int hash_size, int tdb_flags,
150 int open_flags, mode_t mode)
154 for (w=tdb_list;w;w=w->next) {
155 if (strcmp(name, w->name) == 0) {
156 return talloc_reference(mem_ctx, w);
160 w = talloc(mem_ctx, struct tdb_wrap);
165 w->name = talloc_strdup(w, name);
167 w->tdb = tdb_open_ex(name, hash_size, tdb_flags,
168 open_flags, mode, tdb_wrap_log, NULL);
169 if (w->tdb == NULL) {
174 talloc_set_destructor(w, tdb_wrap_destructor);
176 DLIST_ADD(tdb_list, w);