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dba.c
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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2018 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Sascha Schumann <[email protected]> |
| Marcus Boerger <[email protected]> |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#if HAVE_DBA
#include "php_ini.h"
#include <stdio.h>
#include <fcntl.h>
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include "php_dba.h"
#include "ext/standard/info.h"
#include "ext/standard/php_string.h"
#include "ext/standard/flock_compat.h"
#include "php_gdbm.h"
#include "php_ndbm.h"
#include "php_dbm.h"
#include "php_cdb.h"
#include "php_db1.h"
#include "php_db2.h"
#include "php_db3.h"
#include "php_db4.h"
#include "php_flatfile.h"
#include "php_inifile.h"
#include "php_qdbm.h"
#include "php_tcadb.h"
#include "php_lmdb.h"
/* {{{ arginfo */
ZEND_BEGIN_ARG_INFO_EX(arginfo_dba_popen, 0, 0, 2)
ZEND_ARG_INFO(0, path)
ZEND_ARG_INFO(0, mode)
ZEND_ARG_INFO(0, handlername)
ZEND_ARG_VARIADIC_INFO(0, handler_parameters)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_dba_open, 0, 0, 2)
ZEND_ARG_INFO(0, path)
ZEND_ARG_INFO(0, mode)
ZEND_ARG_INFO(0, handlername)
ZEND_ARG_VARIADIC_INFO(0, handler_parameters)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_close, 0)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_exists, 0)
ZEND_ARG_INFO(0, key)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_dba_fetch, 0, 0, 2)
ZEND_ARG_INFO(0, key)
ZEND_ARG_INFO(0, skip)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_key_split, 0)
ZEND_ARG_INFO(0, key)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_firstkey, 0)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_nextkey, 0)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_delete, 0)
ZEND_ARG_INFO(0, key)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_insert, 0)
ZEND_ARG_INFO(0, key)
ZEND_ARG_INFO(0, value)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_replace, 0)
ZEND_ARG_INFO(0, key)
ZEND_ARG_INFO(0, value)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_optimize, 0)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_sync, 0)
ZEND_ARG_INFO(0, handle)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO_EX(arginfo_dba_handlers, 0, 0, 0)
ZEND_ARG_INFO(0, full_info)
ZEND_END_ARG_INFO()
ZEND_BEGIN_ARG_INFO(arginfo_dba_list, 0)
ZEND_END_ARG_INFO()
/* }}} */
/* {{{ dba_functions[]
*/
static const zend_function_entry dba_functions[] = {
PHP_FE(dba_open, arginfo_dba_open)
PHP_FE(dba_popen, arginfo_dba_popen)
PHP_FE(dba_close, arginfo_dba_close)
PHP_FE(dba_delete, arginfo_dba_delete)
PHP_FE(dba_exists, arginfo_dba_exists)
PHP_FE(dba_fetch, arginfo_dba_fetch)
PHP_FE(dba_insert, arginfo_dba_insert)
PHP_FE(dba_replace, arginfo_dba_replace)
PHP_FE(dba_firstkey, arginfo_dba_firstkey)
PHP_FE(dba_nextkey, arginfo_dba_nextkey)
PHP_FE(dba_optimize, arginfo_dba_optimize)
PHP_FE(dba_sync, arginfo_dba_sync)
PHP_FE(dba_handlers, arginfo_dba_handlers)
PHP_FE(dba_list, arginfo_dba_list)
PHP_FE(dba_key_split, arginfo_dba_key_split)
PHP_FE_END
};
/* }}} */
PHP_MINIT_FUNCTION(dba);
PHP_MSHUTDOWN_FUNCTION(dba);
PHP_MINFO_FUNCTION(dba);
ZEND_BEGIN_MODULE_GLOBALS(dba)
char *default_handler;
dba_handler *default_hptr;
ZEND_END_MODULE_GLOBALS(dba)
ZEND_DECLARE_MODULE_GLOBALS(dba)
#ifdef ZTS
#define DBA_G(v) TSRMG(dba_globals_id, zend_dba_globals *, v)
#else
#define DBA_G(v) (dba_globals.v)
#endif
static PHP_GINIT_FUNCTION(dba);
zend_module_entry dba_module_entry = {
STANDARD_MODULE_HEADER,
"dba",
dba_functions,
PHP_MINIT(dba),
PHP_MSHUTDOWN(dba),
NULL,
NULL,
PHP_MINFO(dba),
PHP_DBA_VERSION,
PHP_MODULE_GLOBALS(dba),
PHP_GINIT(dba),
NULL,
NULL,
STANDARD_MODULE_PROPERTIES_EX
};
#ifdef COMPILE_DL_DBA
ZEND_GET_MODULE(dba)
#endif
/* {{{ macromania */
#define DBA_ID_PARS \
zval *id; \
dba_info *info = NULL; \
int ac = ZEND_NUM_ARGS()
/* these are used to get the standard arguments */
/* {{{ php_dba_myke_key */
static size_t php_dba_make_key(zval *key, char **key_str, char **key_free)
{
if (Z_TYPE_P(key) == IS_ARRAY) {
zval *group, *name;
HashPosition pos;
size_t len;
if (zend_hash_num_elements(Z_ARRVAL_P(key)) != 2) {
zend_throw_error(NULL, "Key does not have exactly two elements: (key, name)");
return 0;
}
zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(key), &pos);
group = zend_hash_get_current_data_ex(Z_ARRVAL_P(key), &pos);
zend_hash_move_forward_ex(Z_ARRVAL_P(key), &pos);
name = zend_hash_get_current_data_ex(Z_ARRVAL_P(key), &pos);
convert_to_string_ex(group);
convert_to_string_ex(name);
if (Z_STRLEN_P(group) == 0) {
*key_str = Z_STRVAL_P(name);
*key_free = NULL;
return Z_STRLEN_P(name);
}
len = spprintf(key_str, 0, "[%s]%s", Z_STRVAL_P(group), Z_STRVAL_P(name));
*key_free = *key_str;
return len;
} else {
zval tmp;
size_t len;
ZVAL_COPY(&tmp, key);
convert_to_string(&tmp);
len = Z_STRLEN(tmp);
if (len) {
*key_free = *key_str = estrndup(Z_STRVAL(tmp), Z_STRLEN(tmp));
}
zval_ptr_dtor(&tmp);
return len;
}
}
/* }}} */
#define DBA_GET2 \
zval *key; \
char *key_str, *key_free; \
size_t key_len; \
if (zend_parse_parameters(ac, "zr", &key, &id) == FAILURE) { \
return; \
} \
if ((key_len = php_dba_make_key(key, &key_str, &key_free)) == 0) {\
RETURN_FALSE; \
}
#define DBA_GET2_3 \
zval *key; \
char *key_str, *key_free; \
size_t key_len; \
zend_long skip = 0; \
switch(ac) { \
case 2: \
if (zend_parse_parameters(ac, "zr", &key, &id) == FAILURE) { \
return; \
} \
break; \
case 3: \
if (zend_parse_parameters(ac, "zlr", &key, &skip, &id) == FAILURE) { \
return; \
} \
break; \
default: \
WRONG_PARAM_COUNT; \
} \
if ((key_len = php_dba_make_key(key, &key_str, &key_free)) == 0) {\
RETURN_FALSE; \
}
#define DBA_FETCH_RESOURCE(info, id) \
if ((info = (dba_info *)zend_fetch_resource2(Z_RES_P(id), "DBA identifier", le_db, le_pdb)) == NULL) { \
RETURN_FALSE; \
}
#define DBA_FETCH_RESOURCE_WITH_ID(info, id) \
if ((info = (dba_info *)zend_fetch_resource2(Z_RES_P(id), "DBA identifier", le_db, le_pdb)) == NULL) { \
DBA_ID_DONE; \
RETURN_FALSE; \
}
#define DBA_ID_GET2 DBA_ID_PARS; DBA_GET2; DBA_FETCH_RESOURCE_WITH_ID(info, id)
#define DBA_ID_GET2_3 DBA_ID_PARS; DBA_GET2_3; DBA_FETCH_RESOURCE_WITH_ID(info, id)
#define DBA_ID_DONE \
if (key_free) efree(key_free)
/* a DBA handler must have specific routines */
#define DBA_NAMED_HND(alias, name, flags) \
{\
#alias, flags, dba_open_##name, dba_close_##name, dba_fetch_##name, dba_update_##name, \
dba_exists_##name, dba_delete_##name, dba_firstkey_##name, dba_nextkey_##name, \
dba_optimize_##name, dba_sync_##name, dba_info_##name \
},
#define DBA_HND(name, flags) DBA_NAMED_HND(name, name, flags)
/* check whether the user has write access */
#define DBA_WRITE_CHECK \
if(info->mode != DBA_WRITER && info->mode != DBA_TRUNC && info->mode != DBA_CREAT) { \
php_error_docref(NULL, E_WARNING, "You cannot perform a modification to a database without proper access"); \
RETURN_FALSE; \
}
/* the same check, but with a call to DBA_ID_DONE before returning */
#define DBA_WRITE_CHECK_WITH_ID \
if(info->mode != DBA_WRITER && info->mode != DBA_TRUNC && info->mode != DBA_CREAT) { \
php_error_docref(NULL, E_WARNING, "You cannot perform a modification to a database without proper access"); \
DBA_ID_DONE; \
RETURN_FALSE; \
}
/* }}} */
/* {{{ globals */
static dba_handler handler[] = {
#if DBA_GDBM
DBA_HND(gdbm, DBA_LOCK_EXT) /* Locking done in library if set */
#endif
#if DBA_DBM
DBA_HND(dbm, DBA_LOCK_ALL) /* No lock in lib */
#endif
#if DBA_NDBM
DBA_HND(ndbm, DBA_LOCK_ALL) /* Could be done in library: filemode = 0644 + S_ENFMT */
#endif
#if DBA_CDB
DBA_HND(cdb, DBA_STREAM_OPEN|DBA_LOCK_ALL) /* No lock in lib */
#endif
#if DBA_CDB_BUILTIN
DBA_NAMED_HND(cdb_make, cdb, DBA_STREAM_OPEN|DBA_LOCK_ALL) /* No lock in lib */
#endif
#if DBA_DB1
DBA_HND(db1, DBA_LOCK_ALL) /* No lock in lib */
#endif
#if DBA_DB2
DBA_HND(db2, DBA_LOCK_ALL) /* No lock in lib */
#endif
#if DBA_DB3
DBA_HND(db3, DBA_LOCK_ALL) /* No lock in lib */
#endif
#if DBA_DB4
DBA_HND(db4, DBA_LOCK_ALL) /* No lock in lib */
#endif
#if DBA_INIFILE
DBA_HND(inifile, DBA_STREAM_OPEN|DBA_LOCK_ALL|DBA_CAST_AS_FD) /* No lock in lib */
#endif
#if DBA_FLATFILE
DBA_HND(flatfile, DBA_STREAM_OPEN|DBA_LOCK_ALL|DBA_NO_APPEND) /* No lock in lib */
#endif
#if DBA_QDBM
DBA_HND(qdbm, DBA_LOCK_EXT)
#endif
#if DBA_TCADB
DBA_HND(tcadb, DBA_LOCK_ALL)
#endif
#if DBA_LMDB
DBA_HND(lmdb, DBA_LOCK_EXT)
#endif
{ NULL, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
};
#if DBA_FLATFILE
#define DBA_DEFAULT "flatfile"
#elif DBA_DB4
#define DBA_DEFAULT "db4"
#elif DBA_DB3
#define DBA_DEFAULT "db3"
#elif DBA_DB2
#define DBA_DEFAULT "db2"
#elif DBA_DB1
#define DBA_DEFAULT "db1"
#elif DBA_GDBM
#define DBA_DEFAULT "gdbm"
#elif DBA_NBBM
#define DBA_DEFAULT "ndbm"
#elif DBA_DBM
#define DBA_DEFAULT "dbm"
#elif DBA_QDBM
#define DBA_DEFAULT "qdbm"
#elif DBA_TCADB
#define DBA_DEFAULT "tcadb"
#elif DBA_LMDB
#define DBA_DEFAULT "lmdb"
#else
#define DBA_DEFAULT ""
#endif
/* cdb/cdb_make and ini are no option here */
static int le_db;
static int le_pdb;
/* }}} */
/* {{{ dba_fetch_resource
PHPAPI void dba_fetch_resource(dba_info **pinfo, zval **id)
{
dba_info *info;
DBA_ID_FETCH
*pinfo = info;
}
*/
/* }}} */
/* {{{ dba_get_handler
PHPAPI dba_handler *dba_get_handler(const char* handler_name)
{
dba_handler *hptr;
for (hptr = handler; hptr->name && strcasecmp(hptr->name, handler_name); hptr++);
return hptr;
}
*/
/* }}} */
/* {{{ dba_close
*/
static void dba_close(dba_info *info)
{
if (info->hnd) {
info->hnd->close(info);
}
if (info->path) {
pefree(info->path, info->flags&DBA_PERSISTENT);
}
if (info->fp && info->fp != info->lock.fp) {
if (info->flags & DBA_PERSISTENT) {
php_stream_pclose(info->fp);
} else {
php_stream_close(info->fp);
}
}
if (info->lock.fp) {
if (info->flags & DBA_PERSISTENT) {
php_stream_pclose(info->lock.fp);
} else {
php_stream_close(info->lock.fp);
}
}
if (info->lock.name) {
pefree(info->lock.name, info->flags&DBA_PERSISTENT);
}
pefree(info, info->flags&DBA_PERSISTENT);
}
/* }}} */
/* {{{ dba_close_rsrc
*/
static void dba_close_rsrc(zend_resource *rsrc)
{
dba_info *info = (dba_info *)rsrc->ptr;
dba_close(info);
}
/* }}} */
/* {{{ dba_close_pe_rsrc_deleter */
int dba_close_pe_rsrc_deleter(zval *el, void *pDba)
{
if (Z_RES_P(el)->ptr == pDba) {
if (Z_DELREF_P(el) == 0) {
return ZEND_HASH_APPLY_REMOVE;
} else {
return ZEND_HASH_APPLY_KEEP | ZEND_HASH_APPLY_STOP;
}
} else {
return ZEND_HASH_APPLY_KEEP;
}
}
/* }}} */
/* {{{ dba_close_pe_rsrc */
static void dba_close_pe_rsrc(zend_resource *rsrc)
{
dba_info *info = (dba_info *)rsrc->ptr;
/* closes the resource by calling dba_close_rsrc() */
zend_hash_apply_with_argument(&EG(persistent_list), dba_close_pe_rsrc_deleter, info);
}
/* }}} */
/* {{{ PHP_INI
*/
ZEND_INI_MH(OnUpdateDefaultHandler)
{
dba_handler *hptr;
if (!ZSTR_LEN(new_value)) {
DBA_G(default_hptr) = NULL;
return OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
}
for (hptr = handler; hptr->name && strcasecmp(hptr->name, ZSTR_VAL(new_value)); hptr++);
if (!hptr->name) {
php_error_docref(NULL, E_WARNING, "No such handler: %s", ZSTR_VAL(new_value));
return FAILURE;
}
DBA_G(default_hptr) = hptr;
return OnUpdateString(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
}
PHP_INI_BEGIN()
STD_PHP_INI_ENTRY("dba.default_handler", DBA_DEFAULT, PHP_INI_ALL, OnUpdateDefaultHandler, default_handler, zend_dba_globals, dba_globals)
PHP_INI_END()
/* }}} */
/* {{{ PHP_GINIT_FUNCTION
*/
static PHP_GINIT_FUNCTION(dba)
{
dba_globals->default_handler = "";
dba_globals->default_hptr = NULL;
}
/* }}} */
/* {{{ PHP_MINIT_FUNCTION
*/
PHP_MINIT_FUNCTION(dba)
{
REGISTER_INI_ENTRIES();
le_db = zend_register_list_destructors_ex(dba_close_rsrc, NULL, "dba", module_number);
le_pdb = zend_register_list_destructors_ex(dba_close_pe_rsrc, dba_close_rsrc, "dba persistent", module_number);
return SUCCESS;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION
*/
PHP_MSHUTDOWN_FUNCTION(dba)
{
UNREGISTER_INI_ENTRIES();
return SUCCESS;
}
/* }}} */
#include "zend_smart_str.h"
/* {{{ PHP_MINFO_FUNCTION
*/
PHP_MINFO_FUNCTION(dba)
{
dba_handler *hptr;
smart_str handlers = {0};
for(hptr = handler; hptr->name; hptr++) {
smart_str_appends(&handlers, hptr->name);
smart_str_appendc(&handlers, ' ');
}
php_info_print_table_start();
php_info_print_table_row(2, "DBA support", "enabled");
if (handlers.s) {
smart_str_0(&handlers);
php_info_print_table_row(2, "Supported handlers", ZSTR_VAL(handlers.s));
smart_str_free(&handlers);
} else {
php_info_print_table_row(2, "Supported handlers", "none");
}
php_info_print_table_end();
DISPLAY_INI_ENTRIES();
}
/* }}} */
/* {{{ php_dba_update
*/
static void php_dba_update(INTERNAL_FUNCTION_PARAMETERS, int mode)
{
size_t val_len;
zval *id;
dba_info *info = NULL;
int ac = ZEND_NUM_ARGS();
zval *key;
char *val;
char *key_str, *key_free;
size_t key_len;
if (zend_parse_parameters(ac, "zsr", &key, &val, &val_len, &id) == FAILURE) {
return;
}
if ((key_len = php_dba_make_key(key, &key_str, &key_free)) == 0) {
RETURN_FALSE;
}
DBA_FETCH_RESOURCE_WITH_ID(info, id);
DBA_WRITE_CHECK_WITH_ID;
if (info->hnd->update(info, key_str, key_len, val, val_len, mode) == SUCCESS) {
DBA_ID_DONE;
RETURN_TRUE;
}
DBA_ID_DONE;
RETURN_FALSE;
}
/* }}} */
#define FREENOW if(args) {int i; for (i=0; i<ac; i++) { zval_ptr_dtor(&args[i]); } efree(args);} if(key) efree(key)
/* {{{ php_find_dbm
*/
dba_info *php_dba_find(const char* path)
{
zend_resource *le;
dba_info *info;
zend_long numitems, i;
numitems = zend_hash_next_free_element(&EG(regular_list));
for (i=1; i<numitems; i++) {
if ((le = zend_hash_index_find_ptr(&EG(regular_list), i)) == NULL) {
continue;
}
if (le->type == le_db || le->type == le_pdb) {
info = (dba_info *)(le->ptr);
if (!strcmp(info->path, path)) {
return (dba_info *)(le->ptr);
}
}
}
return NULL;
}
/* }}} */
/* {{{ php_dba_open
*/
static void php_dba_open(INTERNAL_FUNCTION_PARAMETERS, int persistent)
{
zval *args = NULL;
int ac = ZEND_NUM_ARGS();
dba_mode_t modenr;
dba_info *info, *other;
dba_handler *hptr;
char *key = NULL, *error = NULL;
size_t keylen = 0;
int i;
int lock_mode, lock_flag, lock_dbf = 0;
char *file_mode;
char mode[4], *pmode, *lock_file_mode = NULL;
int persistent_flag = persistent ? STREAM_OPEN_PERSISTENT : 0;
zend_string *opened_path = NULL;
char *lock_name;
#ifdef PHP_WIN32
zend_bool restarted = 0;
zend_bool need_creation = 0;
#endif
if (ac < 2) {
WRONG_PARAM_COUNT;
}
/* we pass additional args to the respective handler */
args = safe_emalloc(ac, sizeof(zval), 0);
if (zend_get_parameters_array_ex(ac, args) != SUCCESS) {
efree(args);
WRONG_PARAM_COUNT;
}
/* we only take string arguments */
for (i = 0; i < ac; i++) {
ZVAL_STR(&args[i], zval_get_string(&args[i]));
keylen += Z_STRLEN(args[i]);
}
if (persistent) {
zend_resource *le;
/* calculate hash */
key = safe_emalloc(keylen, 1, 1);
key[keylen] = '\0';
keylen = 0;
for(i = 0; i < ac; i++) {
memcpy(key+keylen, Z_STRVAL(args[i]), Z_STRLEN(args[i]));
keylen += Z_STRLEN(args[i]);
}
/* try to find if we already have this link in our persistent list */
if ((le = zend_hash_str_find_ptr(&EG(persistent_list), key, keylen)) != NULL) {
FREENOW;
if (le->type != le_pdb) {
RETURN_FALSE;
}
info = (dba_info *)le->ptr;
GC_ADDREF(le);
RETURN_RES(zend_register_resource(info, le_pdb));
return;
}
}
if (ac==2) {
hptr = DBA_G(default_hptr);
if (!hptr) {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "No default handler selected");
FREENOW;
RETURN_FALSE;
}
} else {
for (hptr = handler; hptr->name && strcasecmp(hptr->name, Z_STRVAL(args[2])); hptr++);
}
if (!hptr->name) {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "No such handler: %s", Z_STRVAL(args[2]));
FREENOW;
RETURN_FALSE;
}
/* Check mode: [rwnc][fl]?t?
* r: Read
* w: Write
* n: Create/Truncate
* c: Create
*
* d: force lock on database file
* l: force lock on lck file
* -: ignore locking
*
* t: test open database, warning if locked
*/
strlcpy(mode, Z_STRVAL(args[1]), sizeof(mode));
pmode = &mode[0];
if (pmode[0] && (pmode[1]=='d' || pmode[1]=='l' || pmode[1]=='-')) { /* force lock on db file or lck file or disable locking */
switch (pmode[1]) {
case 'd':
lock_dbf = 1;
if ((hptr->flags & DBA_LOCK_ALL) == 0) {
lock_flag = (hptr->flags & DBA_LOCK_ALL);
break;
}
/* no break */
case 'l':
lock_flag = DBA_LOCK_ALL;
if ((hptr->flags & DBA_LOCK_ALL) == 0) {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_NOTICE, "Handler %s does locking internally", hptr->name);
}
break;
default:
case '-':
if ((hptr->flags & DBA_LOCK_ALL) == 0) {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "Locking cannot be disabled for handler %s", hptr->name);
FREENOW;
RETURN_FALSE;
}
lock_flag = 0;
break;
}
} else {
lock_flag = (hptr->flags&DBA_LOCK_ALL);
lock_dbf = 1;
}
switch (*pmode++) {
case 'r':
modenr = DBA_READER;
lock_mode = (lock_flag & DBA_LOCK_READER) ? LOCK_SH : 0;
file_mode = "r";
break;
case 'w':
modenr = DBA_WRITER;
lock_mode = (lock_flag & DBA_LOCK_WRITER) ? LOCK_EX : 0;
file_mode = "r+b";
break;
case 'c': {
#ifdef PHP_WIN32
if (hptr->flags & (DBA_NO_APPEND|DBA_CAST_AS_FD)) {
php_stream_statbuf ssb;
need_creation = (SUCCESS != php_stream_stat_path(Z_STRVAL(args[0]), &ssb));
}
#endif
modenr = DBA_CREAT;
lock_mode = (lock_flag & DBA_LOCK_CREAT) ? LOCK_EX : 0;
if (lock_mode) {
if (lock_dbf) {
/* the create/append check will be done on the lock
* when the lib opens the file it is already created
*/
file_mode = "r+b"; /* read & write, seek 0 */
#ifdef PHP_WIN32
if (!need_creation) {
lock_file_mode = "r+b";
} else
#endif
lock_file_mode = "a+b"; /* append */
} else {
#ifdef PHP_WIN32
if (!need_creation) {
file_mode = "r+b";
} else
#endif
file_mode = "a+b"; /* append */
lock_file_mode = "w+b"; /* create/truncate */
}
} else {
#ifdef PHP_WIN32
if (!need_creation) {
file_mode = "r+b";
} else
#endif
file_mode = "a+b";
}
/* In case of the 'a+b' append mode, the handler is responsible
* to handle any rewind problems (see flatfile handler).
*/
break;
}
case 'n':
modenr = DBA_TRUNC;
lock_mode = (lock_flag & DBA_LOCK_TRUNC) ? LOCK_EX : 0;
file_mode = "w+b";
break;
default:
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "Illegal DBA mode");
FREENOW;
RETURN_FALSE;
}
if (!lock_file_mode) {
lock_file_mode = file_mode;
}
if (*pmode=='d' || *pmode=='l' || *pmode=='-') {
pmode++; /* done already - skip here */
}
if (*pmode=='t') {
pmode++;
if (!lock_flag) {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "You cannot combine modifiers - (no lock) and t (test lock)");
FREENOW;
RETURN_FALSE;
}
if (!lock_mode) {
if ((hptr->flags & DBA_LOCK_ALL) == 0) {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "Handler %s uses its own locking which doesn't support mode modifier t (test lock)", hptr->name);
FREENOW;
RETURN_FALSE;
} else {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "Handler %s doesn't uses locking for this mode which makes modifier t (test lock) obsolete", hptr->name);
FREENOW;
RETURN_FALSE;
}
} else {
lock_mode |= LOCK_NB; /* test =: non blocking */
}
}
if (*pmode) {
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "Illegal DBA mode");
FREENOW;
RETURN_FALSE;
}
info = pemalloc(sizeof(dba_info), persistent);
memset(info, 0, sizeof(dba_info));
info->path = pestrdup(Z_STRVAL(args[0]), persistent);
info->mode = modenr;
info->argc = ac - 3;
info->argv = args + 3;
info->flags = (hptr->flags & ~DBA_LOCK_ALL) | (lock_flag & DBA_LOCK_ALL) | (persistent ? DBA_PERSISTENT : 0);
info->lock.mode = lock_mode;
/* if any open call is a locking call:
* check if we already habe a locking call open that should block this call
* the problem is some systems would allow read during write
*/
if (hptr->flags & DBA_LOCK_ALL) {
if ((other = php_dba_find(info->path)) != NULL) {
if ( ( (lock_mode&LOCK_EX) && (other->lock.mode&(LOCK_EX|LOCK_SH)) )
|| ( (other->lock.mode&LOCK_EX) && (lock_mode&(LOCK_EX|LOCK_SH)) )
) {
error = "Unable to establish lock (database file already open)"; /* force failure exit */
}
}
}
#ifdef PHP_WIN32
restart:
#endif
if (!error && lock_mode) {
if (lock_dbf) {
lock_name = Z_STRVAL(args[0]);
} else {
spprintf(&lock_name, 0, "%s.lck", info->path);
if (!strcmp(file_mode, "r")) {
/* when in read only mode try to use existing .lck file first */
/* do not log errors for .lck file while in read ony mode on .lck file */
lock_file_mode = "rb";
info->lock.fp = php_stream_open_wrapper(lock_name, lock_file_mode, STREAM_MUST_SEEK|IGNORE_PATH|persistent_flag, &opened_path);
}
if (!info->lock.fp) {
/* when not in read mode or failed to open .lck file read only. now try again in create(write) mode and log errors */
lock_file_mode = "a+b";
} else {
if (opened_path) {
info->lock.name = pestrndup(ZSTR_VAL(opened_path), ZSTR_LEN(opened_path), persistent);
zend_string_release_ex(opened_path, 0);
}
}
}
if (!info->lock.fp) {
info->lock.fp = php_stream_open_wrapper(lock_name, lock_file_mode, STREAM_MUST_SEEK|REPORT_ERRORS|IGNORE_PATH|persistent_flag, &opened_path);
if (info->lock.fp) {
if (lock_dbf) {
/* replace the path info with the real path of the opened file */
pefree(info->path, persistent);
info->path = pestrndup(ZSTR_VAL(opened_path), ZSTR_LEN(opened_path), persistent);
}
/* now store the name of the lock */
info->lock.name = pestrndup(ZSTR_VAL(opened_path), ZSTR_LEN(opened_path), persistent);
zend_string_release_ex(opened_path, 0);
}
}
if (!lock_dbf) {
efree(lock_name);
}
if (!info->lock.fp) {
dba_close(info);
/* stream operation already wrote an error message */
FREENOW;
RETURN_FALSE;
}
if (!php_stream_supports_lock(info->lock.fp)) {
error = "Stream does not support locking";
}
if (php_stream_lock(info->lock.fp, lock_mode)) {
error = "Unable to establish lock"; /* force failure exit */
}
}
/* centralised open stream for builtin */
if (!error && (hptr->flags&DBA_STREAM_OPEN)==DBA_STREAM_OPEN) {
if (info->lock.fp && lock_dbf) {
info->fp = info->lock.fp; /* use the same stream for locking and database access */
} else {
info->fp = php_stream_open_wrapper(info->path, file_mode, STREAM_MUST_SEEK|REPORT_ERRORS|IGNORE_PATH|persistent_flag, NULL);
}
if (!info->fp) {
dba_close(info);
/* stream operation already wrote an error message */
FREENOW;
RETURN_FALSE;
}
if (hptr->flags & (DBA_NO_APPEND|DBA_CAST_AS_FD)) {
/* Needed because some systems do not allow to write to the original
* file contents with O_APPEND being set.
*/
if (SUCCESS != php_stream_cast(info->fp, PHP_STREAM_AS_FD, (void*)&info->fd, 1)) {
php_error_docref(NULL, E_WARNING, "Could not cast stream");
dba_close(info);
FREENOW;
RETURN_FALSE;
#ifdef F_SETFL
} else if (modenr == DBA_CREAT) {
int flags = fcntl(info->fd, F_GETFL);
fcntl(info->fd, F_SETFL, flags & ~O_APPEND);
#elif defined(PHP_WIN32)
} else if (modenr == DBA_CREAT && need_creation && !restarted) {
zend_bool close_both;
close_both = (info->fp != info->lock.fp);
php_stream_close(info->lock.fp);
if (close_both) {
php_stream_close(info->fp);
}
info->fp = NULL;
info->lock.fp = NULL;
info->fd = -1;
pefree(info->lock.name, persistent);
lock_file_mode = "r+b";
restarted = 1;
goto restart;
#endif
}
}
}
if (error || hptr->open(info, &error) != SUCCESS) {
dba_close(info);
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "Driver initialization failed for handler: %s%s%s", hptr->name, error?": ":"", error?error:"");
FREENOW;
RETURN_FALSE;
}
info->hnd = hptr;
info->argc = 0;
info->argv = NULL;
if (persistent) {
if (zend_register_persistent_resource(key, keylen, info, le_pdb) == NULL) {
dba_close(info);
php_error_docref2(NULL, Z_STRVAL(args[0]), Z_STRVAL(args[1]), E_WARNING, "Could not register persistent resource");