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db_sqlite.c
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db_sqlite.c
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/*
* Copyright (C) 2010 Dennis Schafroth <[email protected]>
* Copyright (C) 2010 Johannes Thoma <[email protected]>
* Copyright (C) 2010 - 2013 LINBIT Information Technologies GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "csync2.h"
#if defined(HAVE_SQLITE3)
#include <sqlite3.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#include "db_api.h"
#include "db_sqlite.h"
#include "dl.h"
#ifndef HAVE_SQLITE3
int db_sqlite_open(const char *file, db_conn_p * conn_p)
{
return DB_ERROR;
}
#else
static struct db_sqlite3_fns {
int (*sqlite3_open_fn) (const char *, sqlite3 **);
int (*sqlite3_close_fn) (sqlite3 *);
const char *(*sqlite3_errmsg_fn) (sqlite3 *);
int (*sqlite3_exec_fn) (sqlite3 *, const char *, int (*)(void *, int, char **, char **), void *, char **);
int (*sqlite3_prepare_v2_fn) (sqlite3 *, const char *, int, sqlite3_stmt **, const char **pzTail);
const unsigned char *(*sqlite3_column_text_fn) (sqlite3_stmt *, int);
const void *(*sqlite3_column_blob_fn) (sqlite3_stmt *, int);
int (*sqlite3_column_int_fn) (sqlite3_stmt *, int);
int (*sqlite3_step_fn) (sqlite3_stmt *);
int (*sqlite3_finalize_fn) (sqlite3_stmt *);
} f;
static void *dl_handle;
static void db_sqlite3_dlopen(void)
{
csync_debug(2, "Opening shared library libsqlite3.so\n");
dl_handle = dlopen("libsqlite3.so", RTLD_LAZY);
if (dl_handle == NULL) {
csync_fatal
("Could not open libsqlite3.so: %s\n"
"Please install sqlite3 client library (libsqlite3) or use other database (postgres, mysql)\n",
dlerror());
}
csync_debug(2, "Reading symbols from shared library libsqlite3.so\n");
LOOKUP_SYMBOL(dl_handle, sqlite3_open);
LOOKUP_SYMBOL(dl_handle, sqlite3_close);
LOOKUP_SYMBOL(dl_handle, sqlite3_errmsg);
LOOKUP_SYMBOL(dl_handle, sqlite3_exec);
LOOKUP_SYMBOL(dl_handle, sqlite3_prepare_v2);
LOOKUP_SYMBOL(dl_handle, sqlite3_column_text);
LOOKUP_SYMBOL(dl_handle, sqlite3_column_blob);
LOOKUP_SYMBOL(dl_handle, sqlite3_column_int);
LOOKUP_SYMBOL(dl_handle, sqlite3_step);
LOOKUP_SYMBOL(dl_handle, sqlite3_finalize);
}
static int sqlite_errors[] = { SQLITE_OK, SQLITE_ERROR, SQLITE_BUSY, SQLITE_ROW, SQLITE_DONE, -1 };
static int db_errors[] = { DB_OK, DB_ERROR, DB_BUSY, DB_ROW, DB_DONE, -1 };
int db_sqlite_error_map(int sqlite_err)
{
int index;
for (index = 0;; index++) {
if (sqlite_errors[index] == -1)
return DB_ERROR;
if (sqlite_err == sqlite_errors[index])
return db_errors[index];
}
}
int db_sqlite_open(const char *file, db_conn_p * conn_p)
{
sqlite3 *db;
db_sqlite3_dlopen();
int rc = f.sqlite3_open_fn(file, &db);
if (rc != SQLITE_OK) {
return db_sqlite_error_map(rc);
};
db_conn_p conn = calloc(1, sizeof(*conn));
if (conn == NULL) {
return DB_ERROR;
}
*conn_p = conn;
conn->private = db;
conn->close = db_sqlite_close;
conn->exec = db_sqlite_exec;
conn->prepare = db_sqlite_prepare;
conn->errmsg = db_sqlite_errmsg;
conn->upgrade_to_schema = db_sqlite_upgrade_to_schema;
return db_sqlite_error_map(rc);
}
void db_sqlite_close(db_conn_p conn)
{
if (!conn)
return;
if (!conn->private)
return;
f.sqlite3_close_fn(conn->private);
conn->private = 0;
}
const char *db_sqlite_errmsg(db_conn_p conn)
{
if (!conn)
return "(no connection)";
if (!conn->private)
return "(no private data in conn)";
return f.sqlite3_errmsg_fn(conn->private);
}
int db_sqlite_exec(db_conn_p conn, const char *sql)
{
int rc;
if (!conn)
return DB_NO_CONNECTION;
if (!conn->private) {
/* added error element */
return DB_NO_CONNECTION_REAL;
}
rc = f.sqlite3_exec_fn(conn->private, sql, 0, 0, 0);
return db_sqlite_error_map(rc);
}
int db_sqlite_prepare(db_conn_p conn, const char *sql, db_stmt_p * stmt_p, char **pptail)
{
int rc;
*stmt_p = NULL;
if (!conn)
return DB_NO_CONNECTION;
if (!conn->private) {
/* added error element */
return DB_NO_CONNECTION_REAL;
}
db_stmt_p stmt = malloc(sizeof(*stmt));
sqlite3_stmt *sqlite_stmt = 0;
/* TODO avoid strlen, use configurable limit? */
rc = f.sqlite3_prepare_v2_fn(conn->private, sql, strlen(sql), &sqlite_stmt, (const char **)pptail);
if (rc != SQLITE_OK)
return db_sqlite_error_map(rc);
stmt->private = sqlite_stmt;
*stmt_p = stmt;
stmt->get_column_text = db_sqlite_stmt_get_column_text;
stmt->get_column_blob = db_sqlite_stmt_get_column_blob;
stmt->get_column_int = db_sqlite_stmt_get_column_int;
stmt->next = db_sqlite_stmt_next;
stmt->close = db_sqlite_stmt_close;
stmt->db = conn;
return db_sqlite_error_map(rc);
}
const char *db_sqlite_stmt_get_column_text(db_stmt_p stmt, int column)
{
if (!stmt || !stmt->private) {
return 0;
}
sqlite3_stmt *sqlite_stmt = stmt->private;
const unsigned char *result = f.sqlite3_column_text_fn(sqlite_stmt, column);
/* error handling */
return (const char *)result;
}
#if defined(HAVE_SQLITE3)
const void *db_sqlite_stmt_get_column_blob(db_stmt_p stmtx, int col)
{
sqlite3_stmt *stmt = stmtx->private;
return f.sqlite3_column_blob_fn(stmt, col);
}
#endif
int db_sqlite_stmt_get_column_int(db_stmt_p stmt, int column)
{
sqlite3_stmt *sqlite_stmt = stmt->private;
int rc = f.sqlite3_column_int_fn(sqlite_stmt, column);
return db_sqlite_error_map(rc);
}
int db_sqlite_stmt_next(db_stmt_p stmt)
{
sqlite3_stmt *sqlite_stmt = stmt->private;
int rc = f.sqlite3_step_fn(sqlite_stmt);
return db_sqlite_error_map(rc);
}
int db_sqlite_stmt_close(db_stmt_p stmt)
{
sqlite3_stmt *sqlite_stmt = stmt->private;
int rc = f.sqlite3_finalize_fn(sqlite_stmt);
free(stmt);
return db_sqlite_error_map(rc);
}
int db_sqlite_upgrade_to_schema(int version)
{
if (version < 0)
return DB_OK;
if (version > 0)
return DB_ERROR;
csync_debug(2, "Upgrading database schema to version %d.\n", version);
/* *INDENT-OFF* */
csync_db_sql("Creating file table",
"CREATE TABLE file ("
" filename, checktxt,"
" UNIQUE ( filename ) ON CONFLICT REPLACE"
")");
csync_db_sql("Creating dirty table",
"CREATE TABLE dirty ("
" filename, forced, myname, peername,"
" UNIQUE ( filename, peername ) ON CONFLICT IGNORE"
")");
csync_db_sql("Creating hint table",
"CREATE TABLE hint ("
" filename, recursive,"
" UNIQUE ( filename, recursive ) ON CONFLICT IGNORE"
")");
csync_db_sql("Creating action table",
"CREATE TABLE action ("
" filename, command, logfile,"
" UNIQUE ( filename, command ) ON CONFLICT IGNORE"
")");
csync_db_sql("Creating x509_cert table",
"CREATE TABLE x509_cert ("
" peername, certdata,"
" UNIQUE ( peername ) ON CONFLICT IGNORE"
")");
/* *INDENT-ON* */
return DB_OK;
}
#endif