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 John Walker.
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);
64 * Retrieve database type
73 * When using mult_db_connections = 1,
74 * sqlite can be BUSY. We just need sleep a little in this case.
78 static int my_busy_handler(void *arg, int calls)
84 static int my_busy_handler(void *arg, const char* p, int calls)
93 * Initialize database data structure. In principal this should
94 * never have errors, or it is really fatal.
97 db_init_database(JCR *jcr, const char *db_name, const char *db_user, const char *db_password,
98 const char *db_address, int db_port, const char *db_socket,
99 int mult_db_connections)
103 P(mutex); /* lock DB queue */
104 /* Look to see if DB already open */
105 if (!mult_db_connections) {
106 for (mdb=NULL; (mdb=(B_DB *)qnext(&db_list, &mdb->bq)); ) {
107 if (bstrcmp(mdb->db_name, db_name) &&
108 bstrcmp(mdb->db_address, db_address) &&
109 mdb->db_port == db_port) {
110 Dmsg2(300, "DB REopen %d %s\n", mdb->ref_count, db_name);
113 return mdb; /* already open */
117 Dmsg0(300, "db_open first time\n");
118 mdb = (B_DB *) malloc(sizeof(B_DB));
119 memset(mdb, 0, sizeof(B_DB));
120 mdb->db_name = bstrdup(db_name);
121 mdb->have_insert_id = TRUE;
122 mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
124 mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
125 mdb->cached_path = get_pool_memory(PM_FNAME);
126 mdb->cached_path_id = 0;
128 mdb->fname = get_pool_memory(PM_FNAME);
129 mdb->path = get_pool_memory(PM_FNAME);
130 mdb->esc_name = get_pool_memory(PM_FNAME);
131 mdb->esc_path = get_pool_memory(PM_FNAME);
132 mdb->allow_transactions = mult_db_connections;
133 qinsert(&db_list, &mdb->bq); /* put db in list */
139 * Now actually open the database. This can generate errors,
140 * which are returned in the errmsg
142 * DO NOT close the database or free(mdb) here !!!!
145 db_open_database(JCR *jcr, B_DB *mdb)
154 if (mdb->connected) {
158 mdb->connected = FALSE;
160 if ((errstat=rwl_init(&mdb->lock)) != 0) {
161 Mmsg1(&mdb->errmsg, _("Unable to initialize DB lock. ERR=%s\n"),
167 /* open the database */
168 len = strlen(working_directory) + strlen(mdb->db_name) + 5;
169 db_name = (char *)malloc(len);
170 strcpy(db_name, working_directory);
171 strcat(db_name, "/");
172 strcat(db_name, mdb->db_name);
173 strcat(db_name, ".db");
174 if (stat(db_name, &statbuf) != 0) {
175 Mmsg1(&mdb->errmsg, _("Database %s does not exist, please create it.\n"),
182 for (mdb->db=NULL; !mdb->db && retry++ < 10; ) {
184 int stat = sqlite3_open(db_name, &mdb->db);
185 if (stat != SQLITE_OK) {
186 mdb->sqlite_errmsg = (char *)sqlite3_errmsg(mdb->db);
187 sqlite3_close(mdb->db);
190 mdb->sqlite_errmsg = NULL;
193 mdb->db = sqlite_open(
194 db_name, /* database name */
196 &mdb->sqlite_errmsg); /* error message */
199 Dmsg0(300, "sqlite_open\n");
204 if (mdb->db == NULL) {
205 Mmsg2(&mdb->errmsg, _("Unable to open Database=%s. ERR=%s\n"),
206 db_name, mdb->sqlite_errmsg ? mdb->sqlite_errmsg : _("unknown"));
211 mdb->connected = true;
214 #if defined(HAVE_SQLITE3) && defined(SQLITE3_INIT_QUERY)
215 db_sql_query(mdb, SQLITE3_INIT_QUERY, NULL, NULL);
218 if (!check_tables_version(jcr, mdb)) {
223 /* set busy handler to wait when we use mult_db_connections = 1 */
225 sqlite3_busy_handler(mdb->db, my_busy_handler, NULL);
227 sqlite_busy_handler(mdb->db, my_busy_handler, NULL);
235 db_close_database(JCR *jcr, B_DB *mdb)
240 db_end_transaction(jcr, mdb);
242 sql_free_result(mdb);
244 if (mdb->ref_count == 0) {
246 if (mdb->connected && mdb->db) {
247 sqlite_close(mdb->db);
249 rwl_destroy(&mdb->lock);
250 free_pool_memory(mdb->errmsg);
251 free_pool_memory(mdb->cmd);
252 free_pool_memory(mdb->cached_path);
253 free_pool_memory(mdb->fname);
254 free_pool_memory(mdb->path);
255 free_pool_memory(mdb->esc_name);
256 free_pool_memory(mdb->esc_path);
265 void db_thread_cleanup()
268 sqlite3_thread_cleanup();
273 * Return the next unique index (auto-increment) for
274 * the given table. Return 0 on error.
276 int db_next_index(JCR *jcr, B_DB *mdb, char *table, char *index)
278 strcpy(index, "NULL");
284 * Escape strings so that SQLite is happy
286 * NOTE! len is the length of the old string. Your new
287 * string must be long enough (max 2*old+1) to hold
288 * the escaped output.
291 db_escape_string(JCR *jcr, B_DB *db, char *snew, char *old, int len)
318 DB_RESULT_HANDLER *result_handler;
323 * Convert SQLite's callback into Bacula DB callback
325 static int sqlite_result(void *arh_data, int num_fields, char **rows, char **col_names)
327 struct rh_data *rh_data = (struct rh_data *)arh_data;
329 if (rh_data->result_handler) {
330 (*(rh_data->result_handler))(rh_data->ctx, num_fields, rows);
336 * Submit a general SQL command (cmd), and for each row returned,
337 * the sqlite_handler is called with the ctx.
339 int db_sql_query(B_DB *mdb, const char *query, DB_RESULT_HANDLER *result_handler, void *ctx)
341 struct rh_data rh_data;
345 if (mdb->sqlite_errmsg) {
347 sqlite3_free(mdb->sqlite_errmsg);
349 actuallyfree(mdb->sqlite_errmsg);
351 mdb->sqlite_errmsg = NULL;
353 rh_data.result_handler = result_handler;
355 stat = sqlite_exec(mdb->db, query, sqlite_result, (void *)&rh_data, &mdb->sqlite_errmsg);
357 Mmsg(mdb->errmsg, _("Query failed: %s: ERR=%s\n"), query, sql_strerror(mdb));
366 * Submit a sqlite query and retrieve all the data
368 int my_sqlite_query(B_DB *mdb, const char *cmd)
372 my_sqlite_free_table(mdb);
373 if (mdb->sqlite_errmsg) {
375 sqlite3_free(mdb->sqlite_errmsg);
377 actuallyfree(mdb->sqlite_errmsg);
379 mdb->sqlite_errmsg = NULL;
381 stat = sqlite_get_table(mdb->db, (char *)cmd, &mdb->result, &mdb->nrow, &mdb->ncolumn,
382 &mdb->sqlite_errmsg);
383 mdb->row = 0; /* row fetched */
387 /* Fetch one row at a time */
388 SQL_ROW my_sqlite_fetch_row(B_DB *mdb)
390 if (mdb->row >= mdb->nrow) {
394 return &mdb->result[mdb->ncolumn * mdb->row];
397 void my_sqlite_free_table(B_DB *mdb)
401 if (mdb->fields_defined) {
402 for (i=0; i < sql_num_fields(mdb); i++) {
403 free(mdb->fields[i]);
406 mdb->fields_defined = false;
409 sqlite_free_table(mdb->result);
412 mdb->nrow = mdb->ncolumn = 0;
415 void my_sqlite_field_seek(B_DB *mdb, int field)
418 if (mdb->result == NULL) {
421 /* On first call, set up the fields */
422 if (!mdb->fields_defined && sql_num_fields(mdb) > 0) {
423 mdb->fields = (SQL_FIELD **)malloc(sizeof(SQL_FIELD) * mdb->ncolumn);
424 for (i=0; i < sql_num_fields(mdb); i++) {
425 mdb->fields[i] = (SQL_FIELD *)malloc(sizeof(SQL_FIELD));
426 mdb->fields[i]->name = mdb->result[i];
427 mdb->fields[i]->length = cstrlen(mdb->fields[i]->name);
428 mdb->fields[i]->max_length = mdb->fields[i]->length;
429 for (j=1; j <= mdb->nrow; j++) {
431 if (mdb->result[i + mdb->ncolumn *j]) {
432 len = (uint32_t)cstrlen(mdb->result[i + mdb->ncolumn * j]);
436 if (len > mdb->fields[i]->max_length) {
437 mdb->fields[i]->max_length = len;
440 mdb->fields[i]->type = 0;
441 mdb->fields[i]->flags = 1; /* not null */
443 mdb->fields_defined = TRUE;
445 if (field > sql_num_fields(mdb)) {
446 field = sql_num_fields(mdb);
452 SQL_FIELD *my_sqlite_fetch_field(B_DB *mdb)
454 return mdb->fields[mdb->field++];
457 #ifdef HAVE_BATCH_FILE_INSERT
458 char *my_sqlite_batch_lock_query = "BEGIN";
459 char *my_sqlite_batch_unlock_query = "COMMIT";
460 char *my_sqlite_batch_fill_path_query = "INSERT INTO Path (Path) "
461 " SELECT DISTINCT Path FROM batch "
462 " EXCEPT SELECT Path FROM Path ";
464 char *my_sqlite_batch_fill_filename_query = "INSERT INTO Filename (Name) "
465 " SELECT DISTINCT Name FROM batch "
466 " EXCEPT SELECT Name FROM Filename ";
467 #endif /* HAVE_BATCH_FILE_INSERT */
470 #endif /* HAVE_SQLITE */