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/events/events.h"
33 #include "lib/tdb/include/tdb.h"
34 #include "lib/ldb/include/ldb.h"
37 static struct tdb_wrap *tdb_list;
40 this is used to catch debug messages from ldb
42 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
43 const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
45 static void ldb_wrap_debug(void *context, enum ldb_debug_level level,
46 const char *fmt, va_list ap)
49 if (DEBUGLEVEL < 4 && level > LDB_DEBUG_WARNING) {
52 vasprintf(&s, fmt, ap);
54 DEBUG(level, ("ldb: %s\n", s));
59 wrapped connection to a ldb database
60 to close just talloc_free() the returned ldb_context
62 struct ldb_context *ldb_wrap_connect(TALLOC_CTX *mem_ctx,
65 const char *options[])
67 struct ldb_context *ldb;
69 struct event_context *ev;
70 char *real_url = NULL;
72 ldb = ldb_init(mem_ctx);
77 /* we want to use the existing event context if possible. This
78 relies on the fact that in smbd, everything is a child of
79 the main event_context */
80 ev = event_context_find(ldb);
82 ret = ldb_register_samba_handlers(ldb);
88 real_url = private_path(ldb, url);
89 if (real_url == NULL) {
94 ret = ldb_connect(ldb, real_url, flags, options);
100 talloc_free(real_url);
102 ldb_set_debug(ldb, ldb_wrap_debug, NULL);
109 Log tdb messages via DEBUG().
111 static void tdb_wrap_log(TDB_CONTEXT *tdb, int level,
112 const char *format, ...) PRINTF_ATTRIBUTE(3,4);
114 static void tdb_wrap_log(TDB_CONTEXT *tdb, int level,
115 const char *format, ...)
120 va_start(ap, format);
121 vasprintf(&ptr, format, ap);
125 DEBUG(level, ("tdb(%s): %s", tdb->name ? tdb->name : "unnamed", ptr));
131 /* destroy the last connection to a tdb */
132 static int tdb_wrap_destructor(void *ctx)
134 struct tdb_wrap *w = ctx;
136 DLIST_REMOVE(tdb_list, w);
141 wrapped connection to a tdb database
142 to close just talloc_free() the tdb_wrap pointer
144 struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
145 const char *name, int hash_size, int tdb_flags,
146 int open_flags, mode_t mode)
150 for (w=tdb_list;w;w=w->next) {
151 if (strcmp(name, w->name) == 0) {
152 return talloc_reference(mem_ctx, w);
156 w = talloc(mem_ctx, struct tdb_wrap);
161 w->name = talloc_strdup(w, name);
163 w->tdb = tdb_open_ex(name, hash_size, tdb_flags,
164 open_flags, mode, tdb_wrap_log, NULL);
165 if (w->tdb == NULL) {
170 talloc_set_destructor(w, tdb_wrap_destructor);
172 DLIST_ADD(tdb_list, w);