| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | TDB wrap functions
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| 4 |
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| 5 | Copyright (C) Andrew Tridgell 2004
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| 6 | Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 3 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 |
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| 22 | #include "includes.h"
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| 23 | #include "../tdb/include/tdb.h"
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| 24 | #include "../lib/util/dlinklist.h"
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| 25 | #include "tdb_wrap.h"
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| 26 | #include "tdb.h"
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| 27 |
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| 28 | static struct tdb_wrap *tdb_list;
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| 29 |
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| 30 | /* destroy the last connection to a tdb */
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| 31 | static int tdb_wrap_destructor(struct tdb_wrap *w)
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| 32 | {
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| 33 | tdb_close(w->tdb);
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| 34 | DLIST_REMOVE(tdb_list, w);
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| 35 | return 0;
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| 36 | }
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| 37 |
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| 38 | /*
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| 39 | Log tdb messages via DEBUG().
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| 40 | */
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| 41 | static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
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| 42 | const char *format, ...) PRINTF_ATTRIBUTE(3,4);
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| 43 |
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| 44 | static void tdb_wrap_log(TDB_CONTEXT *tdb, enum tdb_debug_level level,
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| 45 | const char *format, ...)
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| 46 | {
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| 47 | va_list ap;
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| 48 | char *ptr = NULL;
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| 49 | int dl;
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| 50 |
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| 51 | va_start(ap, format);
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| 52 | vasprintf(&ptr, format, ap);
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| 53 | va_end(ap);
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| 54 |
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| 55 | switch (level) {
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| 56 | case TDB_DEBUG_FATAL:
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| 57 | dl = 0;
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| 58 | break;
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| 59 | case TDB_DEBUG_ERROR:
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| 60 | dl = 1;
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| 61 | break;
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| 62 | case TDB_DEBUG_WARNING:
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| 63 | dl = 2;
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| 64 | break;
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| 65 | case TDB_DEBUG_TRACE:
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| 66 | dl = 5;
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| 67 | break;
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| 68 | default:
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| 69 | dl = 0;
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| 70 | }
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| 71 |
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| 72 | if (ptr != NULL) {
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| 73 | const char *name = tdb_name(tdb);
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| 74 | DEBUG(dl, ("tdb(%s): %s", name ? name : "unnamed", ptr));
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| 75 | free(ptr);
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| 76 | }
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| 77 | }
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| 78 |
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| 79 |
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| 80 | /*
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| 81 | wrapped connection to a tdb database
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| 82 | to close just talloc_free() the tdb_wrap pointer
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| 83 | */
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| 84 | struct tdb_wrap *tdb_wrap_open(TALLOC_CTX *mem_ctx,
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| 85 | const char *name, int hash_size, int tdb_flags,
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| 86 | int open_flags, mode_t mode)
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| 87 | {
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| 88 | struct tdb_wrap *w;
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| 89 | struct tdb_logging_context log_ctx;
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| 90 | log_ctx.log_fn = tdb_wrap_log;
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| 91 |
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| 92 | for (w=tdb_list;w;w=w->next) {
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| 93 | if (strcmp(name, w->name) == 0) {
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| 94 | return talloc_reference(mem_ctx, w);
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| 95 | }
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| 96 | }
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| 97 |
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| 98 | w = talloc(mem_ctx, struct tdb_wrap);
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| 99 | if (w == NULL) {
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| 100 | return NULL;
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| 101 | }
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| 102 |
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| 103 | w->name = talloc_strdup(w, name);
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| 104 |
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| 105 | w->tdb = tdb_open_ex(name, hash_size, tdb_flags,
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| 106 | open_flags, mode, &log_ctx, NULL);
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| 107 | if (w->tdb == NULL) {
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| 108 | talloc_free(w);
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| 109 | return NULL;
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| 110 | }
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| 111 |
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| 112 | talloc_set_destructor(w, tdb_wrap_destructor);
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| 113 |
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| 114 | DLIST_ADD(tdb_list, w);
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| 115 |
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| 116 | return w;
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| 117 | }
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