2 * Bacula Catalog Database routines specific to SQLite
4 * Kern Sibbald, January 2002
10 Copyright (C) 2002 Kern Sibbald and John Walker
12 This program is free software; you can redistribute it and/or
13 modify it under the terms of the GNU General Public License as
14 published by the Free Software Foundation; either version 2 of
15 the License, or (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 General Public License for more details.
22 You should have received a copy of the GNU General Public
23 License along with this program; if not, write to the Free
24 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /* The following is necessary so that we do not include
31 * the dummy external definition of DB.
33 #define __SQL_C /* indicate that this is sql.c */
40 /* -----------------------------------------------------------------------
42 * SQLite dependent defines and subroutines
44 * -----------------------------------------------------------------------
47 extern char *working_directory;
49 /* List of open databases */
50 static BQUEUE db_list = {&db_list, &db_list};
52 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
54 int QueryDB(char *file, int line, B_DB *db, char *select_cmd);
58 * Initialize database data structure. In principal this should
59 * never have errors, or it is really fatal.
62 db_init_database(char *db_name, char *db_user, char *db_password)
66 P(mutex); /* lock DB queue */
67 /* Look to see if DB already open */
68 for (mdb=NULL; (mdb=(B_DB *)qnext(&db_list, &mdb->bq)); ) {
69 if (strcmp(mdb->db_name, db_name) == 0) {
70 Dmsg2(100, "DB REopen %d %s\n", mdb->ref_count, db_name);
73 return mdb; /* already open */
76 Dmsg0(100, "db_open first time\n");
77 mdb = (B_DB *) malloc(sizeof(B_DB));
78 memset(mdb, 0, sizeof(B_DB));
79 mdb->db_name = bstrdup(db_name);
80 mdb->have_insert_id = TRUE;
81 mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
83 mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
84 mdb->cached_path = get_pool_memory(PM_FNAME);
85 mdb->cached_path_id = 0;
87 qinsert(&db_list, &mdb->bq); /* put db in list */
93 * Now actually open the database. This can generate errors,
94 * which are returned in the errmsg
97 db_open_database(B_DB *mdb)
104 if (mdb->connected) {
108 mdb->connected = FALSE;
110 if (pthread_mutex_init(&mdb->mutex, NULL) != 0) {
111 Mmsg1(&mdb->errmsg, _("Unable to initialize DB mutex. ERR=%s\n"), strerror(errno));
117 if (rwl_init(&mdb->lock) != 0) {
118 Mmsg1(&mdb->errmsg, "Unable to initialize DB lock. ERR=%s\n", strerror(errno));
123 /* open the database */
124 len = strlen(working_directory) + strlen(mdb->db_name) + 5;
125 db_name = (char *)malloc(len);
126 strcpy(db_name, working_directory);
127 strcat(db_name, "/");
128 strcat(db_name, mdb->db_name);
129 strcat(db_name, ".db");
130 if (stat(db_name, &statbuf) != 0) {
131 Mmsg1(&mdb->errmsg, _("Database %s does not exist, please create it.\n"),
137 mdb->db = sqlite_open(
138 db_name, /* database name */
140 &mdb->sqlite_errmsg); /* error message */
142 Dmsg0(50, "sqlite_open\n");
144 if (mdb->db == NULL) {
145 Mmsg2(&mdb->errmsg, _("Unable to open Database=%s. ERR=%s\n"),
146 db_name, mdb->sqlite_errmsg ? mdb->sqlite_errmsg : _("unknown"));
152 if (!check_tables_version(mdb)) {
157 mdb->connected = TRUE;
163 db_close_database(B_DB *mdb)
167 if (mdb->ref_count == 0) {
169 if (mdb->connected && mdb->db) {
170 sqlite_close(mdb->db);
172 /* pthread_mutex_destroy(&mdb->mutex); */
173 rwl_destroy(&mdb->lock);
174 free_pool_memory(mdb->errmsg);
175 free_pool_memory(mdb->cmd);
176 free_pool_memory(mdb->cached_path);
186 * Return the next unique index (auto-increment) for
187 * the given table. Return NULL on error.
189 char *db_next_index(B_DB *mdb, char *table)
194 QUERY_DB(mdb, "BEGIN TRANSACTION");
195 sql_free_result(mdb);
198 "SELECT id FROM NextId WHERE TableName=\"%s\"", table);
199 if (!QUERY_DB(mdb, mdb->cmd)) {
200 Mmsg(&mdb->errmsg, _("next_index query error: ERR=%s\n"), sql_strerror(mdb));
201 QUERY_DB(mdb, "ROLLBACK");
204 if ((row = sql_fetch_row(mdb)) == NULL) {
205 Mmsg(&mdb->errmsg, _("Error fetching index: ERR=%s\n"), sql_strerror(mdb));
206 QUERY_DB(mdb, "ROLLBACK");
209 strncpy(id, row[0], sizeof(id));
210 id[sizeof(id)-1] = 0;
211 sql_free_result(mdb);
214 "UPDATE NextId SET id=id+1 WHERE TableName=\"%s\"", table);
215 if (!QUERY_DB(mdb, mdb->cmd)) {
216 Mmsg(&mdb->errmsg, _("next_index update error: ERR=%s\n"), sql_strerror(mdb));
217 QUERY_DB(mdb, "ROLLBACK");
220 sql_free_result(mdb);
222 QUERY_DB(mdb, "COMMIT");
223 sql_free_result(mdb);
230 db_escape_string(char *snew, char *old, int len)
262 DB_RESULT_HANDLER *result_handler;
267 * Convert SQLite's callback into Bacula DB callback
269 static int sqlite_result(void *arh_data, int num_fields, char **rows, char **col_names)
271 struct rh_data *rh_data = (struct rh_data *)arh_data;
273 if (rh_data->result_handler) {
274 (*(rh_data->result_handler))(rh_data->ctx, num_fields, rows);
280 * Submit a general SQL command (cmd), and for each row returned,
281 * the sqlite_handler is called with the ctx.
283 int db_sql_query(B_DB *mdb, char *query, DB_RESULT_HANDLER *result_handler, void *ctx)
285 struct rh_data rh_data;
289 if (mdb->sqlite_errmsg) {
290 actuallyfree(mdb->sqlite_errmsg);
291 mdb->sqlite_errmsg = NULL;
293 rh_data.result_handler = result_handler;
295 stat = sqlite_exec(mdb->db, query, sqlite_result, (void *)&rh_data, &mdb->sqlite_errmsg);
297 Mmsg(&mdb->errmsg, _("Query failed: %s: ERR=%s\n"), query, sql_strerror(mdb));
306 * Submit a sqlite query and retrieve all the data
308 int my_sqlite_query(B_DB *mdb, char *cmd)
312 if (mdb->sqlite_errmsg) {
313 actuallyfree(mdb->sqlite_errmsg);
314 mdb->sqlite_errmsg = NULL;
316 stat = sqlite_get_table(mdb->db, cmd, &mdb->result, &mdb->nrow, &mdb->ncolumn,
317 &mdb->sqlite_errmsg);
318 mdb->row = 0; /* row fetched */
322 /* Fetch one row at a time */
323 SQL_ROW my_sqlite_fetch_row(B_DB *mdb)
325 if (mdb->row >= mdb->nrow) {
329 return &mdb->result[mdb->ncolumn * mdb->row];
332 void my_sqlite_free_table(B_DB *mdb)
336 if (mdb->fields_defined) {
337 for (i=0; i < sql_num_fields(mdb); i++) {
338 free(mdb->fields[i]);
341 mdb->fields_defined = FALSE;
343 sqlite_free_table(mdb->result);
344 mdb->nrow = mdb->ncolumn = 0;
347 void my_sqlite_field_seek(B_DB *mdb, int field)
350 if (mdb->result == NULL) {
353 /* On first call, set up the fields */
354 if (!mdb->fields_defined && sql_num_fields(mdb) > 0) {
355 mdb->fields = (SQL_FIELD **)malloc(sizeof(SQL_FIELD) * mdb->ncolumn);
356 for (i=0; i < sql_num_fields(mdb); i++) {
357 mdb->fields[i] = (SQL_FIELD *)malloc(sizeof(SQL_FIELD));
358 mdb->fields[i]->name = mdb->result[i];
359 mdb->fields[i]->length = strlen(mdb->fields[i]->name);
360 mdb->fields[i]->max_length = mdb->fields[i]->length;
361 for (j=1; j <= (unsigned)mdb->nrow; j++) {
363 if (mdb->result[i + mdb->ncolumn *j]) {
364 len = (uint32_t)strlen(mdb->result[i + mdb->ncolumn * j]);
368 if (len > mdb->fields[i]->max_length) {
369 mdb->fields[i]->max_length = len;
372 mdb->fields[i]->type = 0;
373 mdb->fields[i]->flags = 1; /* not null */
375 mdb->fields_defined = TRUE;
377 if (field > (int)sql_num_fields(mdb)) {
378 field = (int)sql_num_fields(mdb);
384 SQL_FIELD *my_sqlite_fetch_field(B_DB *mdb)
386 return mdb->fields[mdb->field++];
390 list_dashes(B_DB *mdb, DB_LIST_HANDLER *send, void *ctx)
395 sql_field_seek(mdb, 0);
397 for (i = 0; i < sql_num_fields(mdb); i++) {
398 field = sql_fetch_field(mdb);
399 for (j = 0; j < field->max_length + 2; j++)
407 list_result(B_DB *mdb, DB_LIST_HANDLER *send, void *ctx)
411 unsigned int i, col_len;
412 char buf[2000], ewc[30];
414 if (mdb->result == NULL || mdb->nrow == 0) {
417 /* determine column display widths */
418 sql_field_seek(mdb, 0);
419 for (i = 0; i < sql_num_fields(mdb); i++) {
420 field = sql_fetch_field(mdb);
421 if (IS_NUM(field->type) && field->max_length > 0) { /* fixup for commas */
422 field->max_length += (field->max_length - 1) / 3;
424 col_len = strlen(field->name);
425 if (col_len < field->max_length)
426 col_len = field->max_length;
427 if (col_len < 4 && !IS_NOT_NULL(field->flags))
428 col_len = 4; /* 4 = length of the word "NULL" */
429 field->max_length = col_len; /* reset column info */
432 list_dashes(mdb, send, ctx);
434 sql_field_seek(mdb, 0);
435 for (i = 0; i < sql_num_fields(mdb); i++) {
436 field = sql_fetch_field(mdb);
437 sprintf(buf, " %-*s |", field->max_length, field->name);
441 list_dashes(mdb, send, ctx);
443 while ((row = sql_fetch_row(mdb)) != NULL) {
444 sql_field_seek(mdb, 0);
446 for (i = 0; i < sql_num_fields(mdb); i++) {
447 field = sql_fetch_field(mdb);
448 if (row[i] == NULL) {
449 sprintf(buf, " %-*s |", field->max_length, "NULL");
450 } else if (IS_NUM(field->type)) {
451 sprintf(buf, " %*s |", field->max_length,
452 add_commas(row[i], ewc));
454 sprintf(buf, " %-*s |", field->max_length, row[i]);
460 list_dashes(mdb, send, ctx);
464 #endif /* HAVE_SQLITE */