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|
/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2003 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Brian Schaffner <brian@tool.net> |
| Shane Caraveo <shane@caraveo.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "dl.h"
#include "php_globals.h"
#include "ext/standard/info.h"
#include "SAPI.h"
#if defined(HAVE_LIBDL) || HAVE_MACH_O_DYLD_H
#include <stdlib.h>
#include <stdio.h>
#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#ifdef PHP_WIN32
#include "win32/param.h"
#include "win32/winutil.h"
#define GET_DL_ERROR() php_win_err()
#elif defined(NETWARE)
#ifdef NEW_LIBC
#include <sys/param.h>
#else
#include "netware/param.h"
#endif
#define GET_DL_ERROR() dlerror()
#else
#include <sys/param.h>
#define GET_DL_ERROR() DL_ERROR()
#endif
#endif /* defined(HAVE_LIBDL) || HAVE_MACH_O_DYLD_H */
/* {{{ proto int dl(string extension_filename)
Load a PHP extension at runtime */
PHP_FUNCTION(dl)
{
pval **file;
#ifdef ZTS
if ((strncmp(sapi_module.name, "cgi", 3)!=0) &&
(strcmp(sapi_module.name, "cli")!=0) &&
(strncmp(sapi_module.name, "embed", 5)!=0)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Not supported in multithreaded Web servers - use extension statements in your php.ini");
RETURN_FALSE;
}
#endif
/* obtain arguments */
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &file) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(file);
if (!PG(enable_dl)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Dynamically loaded extentions aren't enabled");
} else if (PG(safe_mode)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Dynamically loaded extensions aren't allowed when running in Safe Mode");
} else {
php_dl(*file, MODULE_TEMPORARY, return_value TSRMLS_CC);
EG(full_tables_cleanup) = 1;
}
}
/* }}} */
#if defined(HAVE_LIBDL) || HAVE_MACH_O_DYLD_H
#ifdef ZTS
#define USING_ZTS 1
#else
#define USING_ZTS 0
#endif
/* {{{ php_dl
*/
void php_dl(pval *file, int type, pval *return_value TSRMLS_DC)
{
void *handle;
char *libpath;
zend_module_entry *module_entry, *tmp;
zend_module_entry *(*get_module)(void);
int error_type;
char *extension_dir;
if (type==MODULE_PERSISTENT) {
/* Use the configuration hash directly, the INI mechanism is not yet initialized */
if (cfg_get_string("extension_dir", &extension_dir)==FAILURE) {
extension_dir = PHP_EXTENSION_DIR;
}
} else {
extension_dir = PG(extension_dir);
}
if (type==MODULE_TEMPORARY) {
error_type = E_WARNING;
} else {
error_type = E_CORE_WARNING;
}
if (extension_dir && extension_dir[0]){
int extension_dir_len = strlen(extension_dir);
libpath = emalloc(extension_dir_len+Z_STRLEN_P(file)+2);
if (IS_SLASH(extension_dir[extension_dir_len-1])) {
sprintf(libpath, "%s%s", extension_dir, Z_STRVAL_P(file)); /* SAFE */
} else {
sprintf(libpath, "%s%c%s", extension_dir, DEFAULT_SLASH, Z_STRVAL_P(file)); /* SAFE */
}
} else {
libpath = estrndup(Z_STRVAL_P(file), Z_STRLEN_P(file));
}
/* load dynamic symbol */
handle = DL_LOAD(libpath);
if (!handle) {
php_error_docref(NULL TSRMLS_CC, error_type, "Unable to load dynamic library '%s' - %s", libpath, GET_DL_ERROR());
efree(libpath);
RETURN_FALSE;
}
efree(libpath);
#ifndef NETWARE
get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "get_module");
/*
* some OS prepend _ to symbol names while their dynamic linker
* does not do that automatically. Thus we check manually for
* _get_module.
*/
if (!get_module)
get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "_get_module");
#else
/* NetWare doesn't support two NLMs exporting same symbol */
{
char symbol_name[64] = "\0";
int module_name_length = Z_STRLEN_P(file) - 4; /* '.nlm' is 4 characters; knock it off */
/* Take the module name (e.g.: 'php_ldap') and append '@get_module' to it */
strncpy(symbol_name, Z_STRVAL_P(file), module_name_length);
symbol_name[module_name_length] = '\0';
strcat(symbol_name, "@");
strcat(symbol_name, "get_module");
get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, symbol_name);
}
/* NetWare doesn't prepend '_' to symbol names; so the corresponding portion of code is also
not required for NetWare */
#endif
if (!get_module) {
DL_UNLOAD(handle);
php_error_docref(NULL TSRMLS_CC, error_type, "Invalid library (maybe not a PHP library) '%s' ", Z_STRVAL_P(file));
RETURN_FALSE;
}
module_entry = get_module();
if ((module_entry->zend_debug != ZEND_DEBUG) || (module_entry->zts != USING_ZTS)
|| (module_entry->zend_api != ZEND_MODULE_API_NO)) {
/* Check for pre-4.1.0 module which has a slightly different module_entry structure :( */
struct pre_4_1_0_module_entry {
char *name;
zend_function_entry *functions;
int (*module_startup_func)(INIT_FUNC_ARGS);
int (*module_shutdown_func)(SHUTDOWN_FUNC_ARGS);
int (*request_startup_func)(INIT_FUNC_ARGS);
int (*request_shutdown_func)(SHUTDOWN_FUNC_ARGS);
void (*info_func)(ZEND_MODULE_INFO_FUNC_ARGS);
int (*global_startup_func)(void);
int (*global_shutdown_func)(void);
int globals_id;
int module_started;
unsigned char type;
void *handle;
int module_number;
unsigned char zend_debug;
unsigned char zts;
unsigned int zend_api;
};
char *name;
int zend_api;
unsigned char zend_debug, zts;
if(( ((struct pre_4_1_0_module_entry *)module_entry)->zend_api > 20000000)
&&(((struct pre_4_1_0_module_entry *)module_entry)->zend_api < 20010901)) {
name = ((struct pre_4_1_0_module_entry *)module_entry)->name;
zend_api = ((struct pre_4_1_0_module_entry *)module_entry)->zend_api;
zend_debug = ((struct pre_4_1_0_module_entry *)module_entry)->zend_debug;
zts = ((struct pre_4_1_0_module_entry *)module_entry)->zts;
} else {
name = module_entry->name;
zend_api = module_entry->zend_api;
zend_debug = module_entry->zend_debug;
zts = module_entry->zts;
}
php_error_docref(NULL TSRMLS_CC, error_type,
"%s: Unable to initialize module\n"
"Module compiled with module API=%d, debug=%d, thread-safety=%d\n"
"PHP compiled with module API=%d, debug=%d, thread-safety=%d\n"
"These options need to match\n",
name, zend_api, zend_debug, zts,
ZEND_MODULE_API_NO, ZEND_DEBUG, USING_ZTS);
DL_UNLOAD(handle);
RETURN_FALSE;
}
Z_TYPE_P(module_entry) = type;
module_entry->module_number = zend_next_free_module();
if (module_entry->module_startup_func) {
if (module_entry->module_startup_func(type, module_entry->module_number TSRMLS_CC)==FAILURE) {
php_error_docref(NULL TSRMLS_CC, error_type, "Unable to initialize module '%s'", module_entry->name);
DL_UNLOAD(handle);
RETURN_FALSE;
}
}
zend_register_module(module_entry);
if ((type == MODULE_TEMPORARY) && module_entry->request_startup_func) {
if (module_entry->request_startup_func(type, module_entry->module_number TSRMLS_CC)) {
php_error_docref(NULL TSRMLS_CC, error_type, "Unable to initialize module '%s'", module_entry->name);
DL_UNLOAD(handle);
RETURN_FALSE;
}
}
/* update the .request_started property... */
if (zend_hash_find(&module_registry, module_entry->name, strlen(module_entry->name)+1, (void **) &tmp)==FAILURE) {
php_error_docref(NULL TSRMLS_CC, error_type, "Loaded module '%s' got lost", module_entry->name);
RETURN_FALSE;
}
tmp->handle = handle;
RETURN_TRUE;
}
/* }}} */
PHP_MINFO_FUNCTION(dl)
{
php_info_print_table_row(2, "Dynamic Library Support", "enabled");
}
#else
void php_dl(pval *file, int type, pval *return_value TSRMLS_DC)
{
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot dynamically load %s - dynamic modules are not supported", Z_STRVAL_P(file));
RETURN_FALSE;
}
PHP_MINFO_FUNCTION(dl)
{
PUTS("Dynamic Library support not available<br />.\n");
}
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
