/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ctype.h>
#include <stdio.h>
#include "apu_config.h"
#include "apu.h"
#include "apr_pools.h"
#include "apr_dso.h"
#include "apr_strings.h"
#include "apr_hash.h"
#include "apr_thread_mutex.h"
#include "apr_lib.h"
#include "apr_atomic.h"
#include "apu_internal.h"
#include "apr_dbd_internal.h"
#include "apr_dbd.h"
#include "apu_version.h"
static apr_hash_t *drivers = NULL;
static apr_uint32_t initialised = 0, in_init = 1;
#define CLEANUP_CAST (apr_status_t (*)(void*))
#if APR_HAS_THREADS
/* deprecated, but required for existing providers. Existing and new
* providers should be refactored to use a provider-specific mutex so
* that different providers do not block one another.
* In APR 1.3 this is no longer used for dso module loading, and
* apu_dso_mutex_[un]lock is used instead.
* In APR 2.0 this should become entirely local to libaprutil-2.so and
* no longer be exported.
*/
static apr_thread_mutex_t* mutex = NULL;
APU_DECLARE(apr_status_t) apr_dbd_mutex_lock()
{
return apr_thread_mutex_lock(mutex);
}
APU_DECLARE(apr_status_t) apr_dbd_mutex_unlock()
{
return apr_thread_mutex_unlock(mutex);
}
#else
APU_DECLARE(apr_status_t) apr_dbd_mutex_lock() {
return APR_SUCCESS;
}
APU_DECLARE(apr_status_t) apr_dbd_mutex_unlock() {
return APR_SUCCESS;
}
#endif
#if !APU_DSO_BUILD
#define DRIVER_LOAD(name,driver,pool) \
{ \
extern const apr_dbd_driver_t driver; \
apr_hash_set(drivers,name,APR_HASH_KEY_STRING,&driver); \
if (driver.init) { \
driver.init(pool); \
} \
}
#endif
static apr_status_t apr_dbd_term(void *ptr)
{
/* set drivers to NULL so init can work again */
drivers = NULL;
/* Everything else we need is handled by cleanups registered
* when we created mutexes and loaded DSOs
*/
return APR_SUCCESS;
}
APU_DECLARE(apr_status_t) apr_dbd_init(apr_pool_t *pool)
{
apr_status_t ret = APR_SUCCESS;
apr_pool_t *parent;
if (apr_atomic_inc32(&initialised)) {
apr_atomic_set32(&initialised, 1); /* prevent wrap-around */
while (apr_atomic_read32(&in_init)) /* wait until we get fully inited */
;
return APR_SUCCESS;
}
/* Top level pool scope, need process-scope lifetime */
for (parent = apr_pool_parent_get(pool);
parent && parent != pool;
parent = apr_pool_parent_get(pool))
pool = parent;
#if APU_DSO_BUILD
/* deprecate in 2.0 - permit implicit initialization */
apu_dso_init(pool);
#endif
drivers = apr_hash_make(pool);
#if APR_HAS_THREADS
ret = apr_thread_mutex_create(&mutex, APR_THREAD_MUTEX_DEFAULT, pool);
/* This already registers a pool cleanup */
#endif
#if !APU_DSO_BUILD
/* Load statically-linked drivers: */
#if APU_HAVE_MYSQL
DRIVER_LOAD("mysql", apr_dbd_mysql_driver, pool);
#endif
#if APU_HAVE_PGSQL
DRIVER_LOAD("pgsql", apr_dbd_pgsql_driver, pool);
#endif
#if APU_HAVE_SQLITE3
DRIVER_LOAD("sqlite3", apr_dbd_sqlite3_driver, pool);
#endif
#if APU_HAVE_SQLITE2
DRIVER_LOAD("sqlite2", apr_dbd_sqlite2_driver, pool);
#endif
#if APU_HAVE_ORACLE
DRIVER_LOAD("oracle", apr_dbd_oracle_driver, pool);
#endif
#if APU_HAVE_FREETDS
DRIVER_LOAD("freetds", apr_dbd_freetds_driver, pool);
#endif
#if APU_HAVE_ODBC
DRIVER_LOAD("odbc", apr_dbd_odbc_driver, pool);
#endif
#if APU_HAVE_SOME_OTHER_BACKEND
DRIVER_LOAD("firebird", apr_dbd_other_driver, pool);
#endif
#endif /* APU_DSO_BUILD */
apr_pool_cleanup_register(pool, NULL, apr_dbd_term,
apr_pool_cleanup_null);
apr_atomic_dec32(&in_init);
return ret;
}
APU_DECLARE(apr_status_t) apr_dbd_get_driver(apr_pool_t *pool, const char *name,
const apr_dbd_driver_t **driver)
{
#if APU_DSO_BUILD
char modname[32];
char symname[34];
apr_dso_handle_sym_t symbol;
#endif
apr_status_t rv;
#if APU_DSO_BUILD
rv = apu_dso_mutex_lock();
if (rv) {
return rv;
}
#endif
*driver = apr_hash_get(drivers, name, APR_HASH_KEY_STRING);
if (*driver) {
#if APU_DSO_BUILD
apu_dso_mutex_unlock();
#endif
return APR_SUCCESS;
}
#if APU_DSO_BUILD
/* The driver DSO must have exactly the same lifetime as the
* drivers hash table; ignore the passed-in pool */
pool = apr_hash_pool_get(drivers);
#if defined(NETWARE)
apr_snprintf(modname, sizeof(modname), "dbd%s.nlm", name);
#elif defined(WIN32) || defined(__CYGWIN__)
apr_snprintf(modname, sizeof(modname),
"apr_dbd_%s-" APU_STRINGIFY(APU_MAJOR_VERSION) ".dll", name);
#else
apr_snprintf(modname, sizeof(modname),
"apr_dbd_%s-" APU_STRINGIFY(APU_MAJOR_VERSION) ".so", name);
#endif
apr_snprintf(symname, sizeof(symname), "apr_dbd_%s_driver", name);
rv = apu_dso_load(NULL, &symbol, modname, symname, pool);
if (rv == APR_SUCCESS || rv == APR_EINIT) { /* previously loaded?!? */
*driver = symbol;
name = apr_pstrdup(pool, name);
apr_hash_set(drivers, name, APR_HASH_KEY_STRING, *driver);
rv = APR_SUCCESS;
if ((*driver)->init) {
(*driver)->init(pool);
}
}
apu_dso_mutex_unlock();
#else /* not builtin and !APU_DSO_BUILD => not implemented */
rv = APR_ENOTIMPL;
#endif
return rv;
}
APU_DECLARE(apr_status_t) apr_dbd_open_ex(const apr_dbd_driver_t *driver,
apr_pool_t *pool, const char *params,
apr_dbd_t **handle,
const char **error)
{
apr_status_t rv;
*handle = (driver->open)(pool, params, error);
if (*handle == NULL) {
return APR_EGENERAL;
}
rv = apr_dbd_check_conn(driver, pool, *handle);
if ((rv != APR_SUCCESS) && (rv != APR_ENOTIMPL)) {
/* XXX: rv is APR error code, but apr_dbd_error() takes int! */
if (error) {
*error = apr_dbd_error(driver, *handle, rv);
}
apr_dbd_close(driver, *handle);
return APR_EGENERAL;
}
return APR_SUCCESS;
}
APU_DECLARE(apr_status_t) apr_dbd_open(const apr_dbd_driver_t *driver,
apr_pool_t *pool, const char *params,
apr_dbd_t **handle)
{
return apr_dbd_open_ex(driver,pool,params,handle,NULL);
}
APU_DECLARE(int) apr_dbd_transaction_start(const apr_dbd_driver_t *driver,
apr_pool_t *pool, apr_dbd_t *handle,
apr_dbd_transaction_t **trans)
{
int ret = driver->start_transaction(pool, handle, trans);
if (*trans) {
apr_pool_cleanup_register(pool, *trans,
CLEANUP_CAST driver->end_transaction,
apr_pool_cleanup_null);
}
return ret;
}
APU_DECLARE(int) apr_dbd_transaction_end(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_transaction_t *trans)
{
apr_pool_cleanup_kill(pool, trans, CLEANUP_CAST driver->end_transaction);
return driver->end_transaction(trans);
}
APU_DECLARE(int) apr_dbd_transaction_mode_get(const apr_dbd_driver_t *driver,
apr_dbd_transaction_t *trans)
{
return driver->transaction_mode_get(trans);
}
APU_DECLARE(int) apr_dbd_transaction_mode_set(const apr_dbd_driver_t *driver,
apr_dbd_transaction_t *trans,
int mode)
{
return driver->transaction_mode_set(trans, mode);
}
APU_DECLARE(apr_status_t) apr_dbd_close(const apr_dbd_driver_t *driver,
apr_dbd_t *handle)
{
return driver->close(handle);
}
APU_DECLARE(const char*) apr_dbd_name(const apr_dbd_driver_t *driver)
{
return driver->name;
}
APU_DECLARE(void*) apr_dbd_native_handle(const apr_dbd_driver_t *driver,
apr_dbd_t *handle)
{
return driver->native_handle(handle);
}
APU_DECLARE(int) apr_dbd_check_conn(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle)
{
return driver->check_conn(pool, handle);
}
APU_DECLARE(int) apr_dbd_set_dbname(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, const char *name)
{
return driver->set_dbname(pool,handle,name);
}
APU_DECLARE(int) apr_dbd_query(const apr_dbd_driver_t *driver,
apr_dbd_t *handle,
int *nrows, const char *statement)
{
return driver->query(handle,nrows,statement);
}
APU_DECLARE(int) apr_dbd_select(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, apr_dbd_results_t **res,
const char *statement, int random)
{
return driver->select(pool,handle,res,statement,random);
}
APU_DECLARE(int) apr_dbd_num_cols(const apr_dbd_driver_t *driver,
apr_dbd_results_t *res)
{
return driver->num_cols(res);
}
APU_DECLARE(int) apr_dbd_num_tuples(const apr_dbd_driver_t *driver,
apr_dbd_results_t *res)
{
return driver->num_tuples(res);
}
APU_DECLARE(int) apr_dbd_get_row(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_results_t *res, apr_dbd_row_t **row,
int rownum)
{
return driver->get_row(pool,res,row,rownum);
}
APU_DECLARE(const char*) apr_dbd_get_entry(const apr_dbd_driver_t *driver,
apr_dbd_row_t *row, int col)
{
return driver->get_entry(row,col);
}
APU_DECLARE(const char*) apr_dbd_get_name(const apr_dbd_driver_t *driver,
apr_dbd_results_t *res, int col)
{
return driver->get_name(res,col);
}
APU_DECLARE(const char*) apr_dbd_error(const apr_dbd_driver_t *driver,
apr_dbd_t *handle, int errnum)
{
return driver->error(handle,errnum);
}
APU_DECLARE(const char*) apr_dbd_escape(const apr_dbd_driver_t *driver,
apr_pool_t *pool, const char *string,
apr_dbd_t *handle)
{
return driver->escape(pool,string,handle);
}
APU_DECLARE(int) apr_dbd_prepare(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, const char *query,
const char *label,
apr_dbd_prepared_t **statement)
{
size_t qlen;
int i, nargs = 0, nvals = 0;
char *p, *pq;
const char *q;
apr_dbd_type_e *t;
if (!driver->pformat) {
return APR_ENOTIMPL;
}
/* find the number of parameters in the query */
for (q = query; *q; q++) {
if (q[0] == '%') {
if (apr_isalpha(q[1])) {
nargs++;
} else if (q[1] == '%') {
q++;
}
}
}
nvals = nargs;
qlen = strlen(query) +
nargs * (strlen(driver->pformat) + sizeof(nargs) * 3 + 2) + 1;
pq = apr_palloc(pool, qlen);
t = apr_pcalloc(pool, sizeof(*t) * nargs);
for (p = pq, q = query, i = 0; *q; q++) {
if (q[0] == '%') {
if (apr_isalpha(q[1])) {
switch (q[1]) {
case 'd': t[i] = APR_DBD_TYPE_INT; break;
case 'u': t[i] = APR_DBD_TYPE_UINT; break;
case 'f': t[i] = APR_DBD_TYPE_FLOAT; break;
case 'h':
switch (q[2]) {
case 'h':
switch (q[3]){
case 'd': t[i] = APR_DBD_TYPE_TINY; q += 2; break;
case 'u': t[i] = APR_DBD_TYPE_UTINY; q += 2; break;
}
break;
case 'd': t[i] = APR_DBD_TYPE_SHORT; q++; break;
case 'u': t[i] = APR_DBD_TYPE_USHORT; q++; break;
}
break;
case 'l':
switch (q[2]) {
case 'l':
switch (q[3]){
case 'd': t[i] = APR_DBD_TYPE_LONGLONG; q += 2; break;
case 'u': t[i] = APR_DBD_TYPE_ULONGLONG; q += 2; break;
}
break;
case 'd': t[i] = APR_DBD_TYPE_LONG; q++; break;
case 'u': t[i] = APR_DBD_TYPE_ULONG; q++; break;
case 'f': t[i] = APR_DBD_TYPE_DOUBLE; q++; break;
}
break;
case 'p':
if (q[2] == 'D') {
switch (q[3]) {
case 't': t[i] = APR_DBD_TYPE_TEXT; q += 2; break;
case 'i': t[i] = APR_DBD_TYPE_TIME; q += 2; break;
case 'd': t[i] = APR_DBD_TYPE_DATE; q += 2; break;
case 'a': t[i] = APR_DBD_TYPE_DATETIME; q += 2; break;
case 's': t[i] = APR_DBD_TYPE_TIMESTAMP; q += 2; break;
case 'z': t[i] = APR_DBD_TYPE_ZTIMESTAMP; q += 2; break;
case 'b': t[i] = APR_DBD_TYPE_BLOB; q += 2; break;
case 'c': t[i] = APR_DBD_TYPE_CLOB; q += 2; break;
case 'n': t[i] = APR_DBD_TYPE_NULL; q += 2; break;
}
}
break;
}
q++;
switch (t[i]) {
case APR_DBD_TYPE_NONE: /* by default, we expect strings */
t[i] = APR_DBD_TYPE_STRING;
break;
case APR_DBD_TYPE_BLOB:
case APR_DBD_TYPE_CLOB: /* three (3) more values passed in */
nvals += 3;
break;
default:
break;
}
/* insert database specific parameter reference */
p += apr_snprintf(p, qlen - (p - pq), driver->pformat, ++i);
} else if (q[1] == '%') { /* reduce %% to % */
*p++ = *q++;
} else {
*p++ = *q;
}
} else {
*p++ = *q;
}
}
*p = '\0';
return driver->prepare(pool,handle,pq,label,nargs,nvals,t,statement);
}
APU_DECLARE(int) apr_dbd_pquery(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, int *nrows,
apr_dbd_prepared_t *statement,
int nargs, const char **args)
{
return driver->pquery(pool,handle,nrows,statement,args);
}
APU_DECLARE(int) apr_dbd_pselect(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, apr_dbd_results_t **res,
apr_dbd_prepared_t *statement, int random,
int nargs, const char **args)
{
return driver->pselect(pool,handle,res,statement,random,args);
}
APU_DECLARE_NONSTD(int) apr_dbd_pvquery(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, int *nrows,
apr_dbd_prepared_t *statement, ...)
{
int ret;
va_list args;
va_start(args, statement);
ret = driver->pvquery(pool,handle,nrows,statement,args);
va_end(args);
return ret;
}
APU_DECLARE_NONSTD(int) apr_dbd_pvselect(const apr_dbd_driver_t *driver,
apr_pool_t *pool, apr_dbd_t *handle,
apr_dbd_results_t **res,
apr_dbd_prepared_t *statement,
int random, ...)
{
int ret;
va_list args;
va_start(args, random);
ret = driver->pvselect(pool,handle,res,statement,random,args);
va_end(args);
return ret;
}
APU_DECLARE(int) apr_dbd_pbquery(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, int *nrows,
apr_dbd_prepared_t *statement,
const void **args)
{
return driver->pbquery(pool,handle,nrows,statement,args);
}
APU_DECLARE(int) apr_dbd_pbselect(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, apr_dbd_results_t **res,
apr_dbd_prepared_t *statement, int random,
const void **args)
{
return driver->pbselect(pool,handle,res,statement,random,args);
}
APU_DECLARE_NONSTD(int) apr_dbd_pvbquery(const apr_dbd_driver_t *driver,
apr_pool_t *pool,
apr_dbd_t *handle, int *nrows,
apr_dbd_prepared_t *statement, ...)
{
int ret;
va_list args;
va_start(args, statement);
ret = driver->pvbquery(pool,handle,nrows,statement,args);
va_end(args);
return ret;
}
APU_DECLARE_NONSTD(int) apr_dbd_pvbselect(const apr_dbd_driver_t *driver,
apr_pool_t *pool, apr_dbd_t *handle,
apr_dbd_results_t **res,
apr_dbd_prepared_t *statement,
int random, ...)
{
int ret;
va_list args;
va_start(args, random);
ret = driver->pvbselect(pool,handle,res,statement,random,args);
va_end(args);
return ret;
}
APU_DECLARE(apr_status_t) apr_dbd_datum_get(const apr_dbd_driver_t *driver,
apr_dbd_row_t *row, int col,
apr_dbd_type_e type, void *data)
{
return driver->datum_get(row,col,type,data);
}