2 Bacula® - The Network Backup Solution
4 Copyright (C) 2000-2007 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version two of the GNU General Public
10 License as published by the Free Software Foundation and included
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 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., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * Bacula Catalog Database routines specific to SQLite
31 * Kern Sibbald, January 2002
38 /* The following is necessary so that we do not include
39 * the dummy external definition of DB.
41 #define __SQL_C /* indicate that this is sql.c */
46 #if HAVE_SQLITE || HAVE_SQLITE3
48 /* -----------------------------------------------------------------------
50 * SQLite dependent defines and subroutines
52 * -----------------------------------------------------------------------
55 /* List of open databases */
56 static BQUEUE db_list = {&db_list, &db_list};
58 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
60 int QueryDB(const char *file, int line, JCR *jcr, B_DB *db, char *select_cmd);
63 * Retrieve database type
76 * When using mult_db_connections = 1,
77 * sqlite can be BUSY. We just need sleep a little in this case.
81 static int my_busy_handler(void *arg, int calls)
87 static int my_busy_handler(void *arg, const char* p, int calls)
96 * Initialize database data structure. In principal this should
97 * never have errors, or it is really fatal.
100 db_init_database(JCR *jcr, const char *db_name, const char *db_user, const char *db_password,
101 const char *db_address, int db_port, const char *db_socket,
102 int mult_db_connections)
106 P(mutex); /* lock DB queue */
107 /* Look to see if DB already open */
108 if (!mult_db_connections) {
109 for (mdb=NULL; (mdb=(B_DB *)qnext(&db_list, &mdb->bq)); ) {
110 if (bstrcmp(mdb->db_name, db_name) &&
111 bstrcmp(mdb->db_address, db_address) &&
112 mdb->db_port == db_port) {
113 Dmsg2(300, "DB REopen %d %s\n", mdb->ref_count, db_name);
116 return mdb; /* already open */
120 Dmsg0(300, "db_open first time\n");
121 mdb = (B_DB *) malloc(sizeof(B_DB));
122 memset(mdb, 0, sizeof(B_DB));
123 mdb->db_name = bstrdup(db_name);
124 mdb->have_insert_id = TRUE;
125 mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
127 mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
128 mdb->cached_path = get_pool_memory(PM_FNAME);
129 mdb->cached_path_id = 0;
131 mdb->fname = get_pool_memory(PM_FNAME);
132 mdb->path = get_pool_memory(PM_FNAME);
133 mdb->esc_name = get_pool_memory(PM_FNAME);
134 mdb->esc_path = get_pool_memory(PM_FNAME);
135 mdb->allow_transactions = mult_db_connections;
136 qinsert(&db_list, &mdb->bq); /* put db in list */
142 * Now actually open the database. This can generate errors,
143 * which are returned in the errmsg
145 * DO NOT close the database or free(mdb) here !!!!
148 db_open_database(JCR *jcr, B_DB *mdb)
157 if (mdb->connected) {
161 mdb->connected = FALSE;
163 if ((errstat=rwl_init(&mdb->lock)) != 0) {
165 Mmsg1(&mdb->errmsg, _("Unable to initialize DB lock. ERR=%s\n"),
166 be.bstrerror(errstat));
171 /* open the database */
172 len = strlen(working_directory) + strlen(mdb->db_name) + 5;
173 db_name = (char *)malloc(len);
174 strcpy(db_name, working_directory);
175 strcat(db_name, "/");
176 strcat(db_name, mdb->db_name);
177 strcat(db_name, ".db");
178 if (stat(db_name, &statbuf) != 0) {
179 Mmsg1(&mdb->errmsg, _("Database %s does not exist, please create it.\n"),
186 for (mdb->db=NULL; !mdb->db && retry++ < 10; ) {
188 int stat = sqlite3_open(db_name, &mdb->db);
189 if (stat != SQLITE_OK) {
190 mdb->sqlite_errmsg = (char *)sqlite3_errmsg(mdb->db);
191 sqlite3_close(mdb->db);
194 mdb->sqlite_errmsg = NULL;
197 mdb->db = sqlite_open(
198 db_name, /* database name */
200 &mdb->sqlite_errmsg); /* error message */
203 Dmsg0(300, "sqlite_open\n");
208 if (mdb->db == NULL) {
209 Mmsg2(&mdb->errmsg, _("Unable to open Database=%s. ERR=%s\n"),
210 db_name, mdb->sqlite_errmsg ? mdb->sqlite_errmsg : _("unknown"));
215 mdb->connected = true;
218 /* set busy handler to wait when we use mult_db_connections = 1 */
220 sqlite3_busy_handler(mdb->db, my_busy_handler, NULL);
222 sqlite_busy_handler(mdb->db, my_busy_handler, NULL);
225 #if defined(HAVE_SQLITE3) && defined(SQLITE3_INIT_QUERY)
226 db_sql_query(mdb, SQLITE3_INIT_QUERY, NULL, NULL);
229 if (!check_tables_version(jcr, mdb)) {
240 db_close_database(JCR *jcr, B_DB *mdb)
245 db_end_transaction(jcr, mdb);
247 sql_free_result(mdb);
249 if (mdb->ref_count == 0) {
251 if (mdb->connected && mdb->db) {
252 sqlite_close(mdb->db);
254 rwl_destroy(&mdb->lock);
255 free_pool_memory(mdb->errmsg);
256 free_pool_memory(mdb->cmd);
257 free_pool_memory(mdb->cached_path);
258 free_pool_memory(mdb->fname);
259 free_pool_memory(mdb->path);
260 free_pool_memory(mdb->esc_name);
261 free_pool_memory(mdb->esc_path);
270 void db_thread_cleanup()
273 sqlite3_thread_cleanup();
278 * Return the next unique index (auto-increment) for
279 * the given table. Return 0 on error.
281 int db_next_index(JCR *jcr, B_DB *mdb, char *table, char *index)
283 strcpy(index, "NULL");
289 * Escape strings so that SQLite is happy
291 * NOTE! len is the length of the old string. Your new
292 * string must be long enough (max 2*old+1) to hold
293 * the escaped output.
296 db_escape_string(JCR *jcr, B_DB *db, char *snew, char *old, int len)
323 DB_RESULT_HANDLER *result_handler;
328 * Convert SQLite's callback into Bacula DB callback
330 static int sqlite_result(void *arh_data, int num_fields, char **rows, char **col_names)
332 struct rh_data *rh_data = (struct rh_data *)arh_data;
334 if (rh_data->result_handler) {
335 (*(rh_data->result_handler))(rh_data->ctx, num_fields, rows);
341 * Submit a general SQL command (cmd), and for each row returned,
342 * the sqlite_handler is called with the ctx.
344 bool db_sql_query(B_DB *mdb, const char *query, DB_RESULT_HANDLER *result_handler, void *ctx)
346 struct rh_data rh_data;
350 if (mdb->sqlite_errmsg) {
352 sqlite3_free(mdb->sqlite_errmsg);
354 actuallyfree(mdb->sqlite_errmsg);
356 mdb->sqlite_errmsg = NULL;
358 rh_data.result_handler = result_handler;
360 stat = sqlite_exec(mdb->db, query, sqlite_result, (void *)&rh_data, &mdb->sqlite_errmsg);
362 Mmsg(mdb->errmsg, _("Query failed: %s: ERR=%s\n"), query, sql_strerror(mdb));
371 * Submit a sqlite query and retrieve all the data
373 int my_sqlite_query(B_DB *mdb, const char *cmd)
377 my_sqlite_free_table(mdb);
378 if (mdb->sqlite_errmsg) {
380 sqlite3_free(mdb->sqlite_errmsg);
382 actuallyfree(mdb->sqlite_errmsg);
384 mdb->sqlite_errmsg = NULL;
386 stat = sqlite_get_table(mdb->db, (char *)cmd, &mdb->result, &mdb->nrow, &mdb->ncolumn,
387 &mdb->sqlite_errmsg);
388 mdb->row = 0; /* row fetched */
392 /* Fetch one row at a time */
393 SQL_ROW my_sqlite_fetch_row(B_DB *mdb)
395 if (mdb->row >= mdb->nrow) {
399 return &mdb->result[mdb->ncolumn * mdb->row];
402 void my_sqlite_free_table(B_DB *mdb)
406 if (mdb->fields_defined) {
407 for (i=0; i < sql_num_fields(mdb); i++) {
408 free(mdb->fields[i]);
411 mdb->fields_defined = false;
414 sqlite_free_table(mdb->result);
417 mdb->nrow = mdb->ncolumn = 0;
420 void my_sqlite_field_seek(B_DB *mdb, int field)
423 if (mdb->result == NULL) {
426 /* On first call, set up the fields */
427 if (!mdb->fields_defined && sql_num_fields(mdb) > 0) {
428 mdb->fields = (SQL_FIELD **)malloc(sizeof(SQL_FIELD) * mdb->ncolumn);
429 for (i=0; i < sql_num_fields(mdb); i++) {
430 mdb->fields[i] = (SQL_FIELD *)malloc(sizeof(SQL_FIELD));
431 mdb->fields[i]->name = mdb->result[i];
432 mdb->fields[i]->length = cstrlen(mdb->fields[i]->name);
433 mdb->fields[i]->max_length = mdb->fields[i]->length;
434 for (j=1; j <= mdb->nrow; j++) {
436 if (mdb->result[i + mdb->ncolumn *j]) {
437 len = (uint32_t)cstrlen(mdb->result[i + mdb->ncolumn * j]);
441 if (len > mdb->fields[i]->max_length) {
442 mdb->fields[i]->max_length = len;
445 mdb->fields[i]->type = 0;
446 mdb->fields[i]->flags = 1; /* not null */
448 mdb->fields_defined = TRUE;
450 if (field > sql_num_fields(mdb)) {
451 field = sql_num_fields(mdb);
457 SQL_FIELD *my_sqlite_fetch_field(B_DB *mdb)
459 return mdb->fields[mdb->field++];
462 #ifdef HAVE_BATCH_FILE_INSERT
463 const char *my_sqlite_batch_lock_query = "BEGIN";
464 const char *my_sqlite_batch_unlock_query = "COMMIT";
466 const char *my_sqlite_batch_fill_path_query =
467 "INSERT INTO Path (Path)"
468 " SELECT DISTINCT Path FROM batch"
469 " EXCEPT SELECT Path FROM Path";
471 const char *my_sqlite_batch_fill_filename_query =
472 "INSERT INTO Filename (Name)"
473 " SELECT DISTINCT Name FROM batch "
474 " EXCEPT SELECT Name FROM Filename";
475 #endif /* HAVE_BATCH_FILE_INSERT */
478 #endif /* HAVE_SQLITE */