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|
/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2001 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"
#ifndef PHP_WIN32
#include "build-defs.h"
#endif
#ifdef HAVE_LIBDL
#include <stdlib.h>
#include <stdio.h>
#if 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()
#else
#include <sys/param.h>
#define GET_DL_ERROR() dlerror()
#endif
#endif
/* {{{ proto int dl(string extension_filename)
Load a PHP extension at runtime */
PHP_FUNCTION(dl)
{
pval **file;
#ifdef ZTS
if (strcmp(sapi_module.name, "cgi")!=0) {
php_error(E_ERROR, "dl() is not supported in multithreaded Web servers - use extension statements in your php.ini");
}
#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(E_ERROR, "Dynamically loaded extentions aren't enabled.");
} else if (PG(safe_mode)) {
php_error(E_ERROR, "Dynamically loaded extensions aren't allowed when running in SAFE MODE.");
} else {
php_dl(*file, MODULE_TEMPORARY, return_value TSRMLS_CC);
}
}
/* }}} */
#ifdef HAVE_LIBDL
#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+file->value.str.len+2);
if (IS_SLASH(extension_dir[extension_dir_len-1])) {
sprintf(libpath,"%s%s", extension_dir, file->value.str.val); /* SAFE */
} else {
sprintf(libpath,"%s/%s", extension_dir, file->value.str.val); /* SAFE */
}
} else {
libpath = estrndup(file->value.str.val, file->value.str.len);
}
/* load dynamic symbol */
handle = DL_LOAD(libpath);
if (!handle) {
php_error(error_type, "Unable to load dynamic library '%s' - %s", libpath, GET_DL_ERROR());
efree(libpath);
RETURN_FALSE;
}
efree(libpath);
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");
if (!get_module) {
DL_UNLOAD(handle);
php_error(error_type, "Invalid library (maybe not a PHP library) '%s' ", file->value.str.val);
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)) {
php_error(error_type,
"%s: Unable to initialize module\n"
"Module compiled with debug=%d, thread-safety=%d module API=%d\n"
"PHP compiled with debug=%d, thread-safety=%d module API=%d\n"
"These options need to match\n",
module_entry->name, module_entry->zend_debug, module_entry->zts, module_entry->zend_api,
ZEND_DEBUG, USING_ZTS, ZEND_MODULE_API_NO);
DL_UNLOAD(handle);
RETURN_FALSE;
}
module_entry->type = 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(error_type, "%s: Unable to initialize module", 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(error_type, "%s: Unable to initialize module", 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(error_type,"%s: Loaded module 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)
{
php_error(E_WARNING,"Cannot dynamically load %s - dynamic modules are not supported", file->value.str.val);
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 tw=78 fdm=marker
* vim<600: sw=4 ts=4 tw=78
*/
|
