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|
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 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 |
| 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@php.net> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "dl.h"
#include "php_globals.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "SAPI.h"
#if defined(HAVE_LIBDL)
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#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() DL_ERROR()
#endif
#endif /* defined(HAVE_LIBDL) */
/* {{{ proto int dl(string extension_filename)
Load a PHP extension at runtime */
PHPAPI PHP_FUNCTION(dl)
{
char *filename;
size_t filename_len;
ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STRING(filename, filename_len)
ZEND_PARSE_PARAMETERS_END();
if (!PG(enable_dl)) {
php_error_docref(NULL, E_WARNING, "Dynamically loaded extensions aren't enabled");
RETURN_FALSE;
}
if (filename_len >= MAXPATHLEN) {
php_error_docref(NULL, E_WARNING, "File name exceeds the maximum allowed length of %d characters", MAXPATHLEN);
RETURN_FALSE;
}
php_dl(filename, MODULE_TEMPORARY, return_value, 0);
if (Z_TYPE_P(return_value) == IS_TRUE) {
EG(full_tables_cleanup) = 1;
}
}
/* }}} */
#if defined(HAVE_LIBDL)
/* {{{ php_load_shlib
*/
PHPAPI void *php_load_shlib(char *path, char **errp)
{
void *handle;
char *err;
handle = DL_LOAD(path);
if (!handle) {
err = GET_DL_ERROR();
#ifdef PHP_WIN32
if (err && (*err)) {
size_t i = strlen(err);
(*errp)=estrdup(err);
php_win32_error_msg_free(err);
while (i > 0 && isspace((*errp)[i-1])) { (*errp)[i-1] = '\0'; i--; }
} else {
(*errp) = estrdup("<No message>");
}
#else
(*errp) = estrdup(err);
GET_DL_ERROR(); /* free the buffer storing the error */
#endif
}
return handle;
}
/* }}} */
/* {{{ php_load_extension
*/
PHPAPI int php_load_extension(char *filename, int type, int start_now)
{
void *handle;
char *libpath;
zend_module_entry *module_entry;
zend_module_entry *(*get_module)(void);
int error_type, slash_suffix = 0;
char *extension_dir;
char *err1, *err2;
if (type == MODULE_PERSISTENT) {
extension_dir = INI_STR("extension_dir");
} else {
extension_dir = PG(extension_dir);
}
if (type == MODULE_TEMPORARY) {
error_type = E_WARNING;
} else {
error_type = E_CORE_WARNING;
}
/* Check if passed filename contains directory separators */
if (strchr(filename, '/') != NULL || strchr(filename, DEFAULT_SLASH) != NULL) {
/* Passing modules with full path is not supported for dynamically loaded extensions */
if (type == MODULE_TEMPORARY) {
php_error_docref(NULL, E_WARNING, "Temporary module name should contain only filename");
return FAILURE;
}
libpath = estrdup(filename);
} else if (extension_dir && extension_dir[0]) {
slash_suffix = IS_SLASH(extension_dir[strlen(extension_dir)-1]);
/* Try as filename first */
if (slash_suffix) {
spprintf(&libpath, 0, "%s%s", extension_dir, filename); /* SAFE */
} else {
spprintf(&libpath, 0, "%s%c%s", extension_dir, DEFAULT_SLASH, filename); /* SAFE */
}
} else {
return FAILURE; /* Not full path given or extension_dir is not set */
}
handle = php_load_shlib(libpath, &err1);
if (!handle) {
/* Now, consider 'filename' as extension name and build file name */
char *orig_libpath = libpath;
if (slash_suffix) {
spprintf(&libpath, 0, "%s" PHP_SHLIB_EXT_PREFIX "%s." PHP_SHLIB_SUFFIX, extension_dir, filename); /* SAFE */
} else {
spprintf(&libpath, 0, "%s%c" PHP_SHLIB_EXT_PREFIX "%s." PHP_SHLIB_SUFFIX, extension_dir, DEFAULT_SLASH, filename); /* SAFE */
}
handle = php_load_shlib(libpath, &err2);
if (!handle) {
php_error_docref(NULL, error_type, "Unable to load dynamic library '%s' (tried: %s (%s), %s (%s))",
filename, orig_libpath, err1, libpath, err2);
efree(orig_libpath);
efree(err1);
efree(libpath);
efree(err2);
return FAILURE;
}
efree(orig_libpath);
efree(err1);
}
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) {
if (DL_FETCH_SYMBOL(handle, "zend_extension_entry") || DL_FETCH_SYMBOL(handle, "_zend_extension_entry")) {
DL_UNLOAD(handle);
php_error_docref(NULL, error_type, "Invalid library (appears to be a Zend Extension, try loading using zend_extension=%s from php.ini)", filename);
return FAILURE;
}
DL_UNLOAD(handle);
php_error_docref(NULL, error_type, "Invalid library (maybe not a PHP library) '%s'", filename);
return FAILURE;
}
module_entry = get_module();
if (module_entry->zend_api != ZEND_MODULE_API_NO) {
php_error_docref(NULL, error_type,
"%s: Unable to initialize module\n"
"Module compiled with module API=%d\n"
"PHP compiled with module API=%d\n"
"These options need to match\n",
module_entry->name, module_entry->zend_api, ZEND_MODULE_API_NO);
DL_UNLOAD(handle);
return FAILURE;
}
if(strcmp(module_entry->build_id, ZEND_MODULE_BUILD_ID)) {
php_error_docref(NULL, error_type,
"%s: Unable to initialize module\n"
"Module compiled with build ID=%s\n"
"PHP compiled with build ID=%s\n"
"These options need to match\n",
module_entry->name, module_entry->build_id, ZEND_MODULE_BUILD_ID);
DL_UNLOAD(handle);
return FAILURE;
}
module_entry->type = type;
module_entry->module_number = zend_next_free_module();
module_entry->handle = handle;
if ((module_entry = zend_register_module_ex(module_entry)) == NULL) {
DL_UNLOAD(handle);
return FAILURE;
}
if ((type == MODULE_TEMPORARY || start_now) && zend_startup_module_ex(module_entry) == FAILURE) {
DL_UNLOAD(handle);
return FAILURE;
}
if ((type == MODULE_TEMPORARY || start_now) && module_entry->request_startup_func) {
if (module_entry->request_startup_func(type, module_entry->module_number) == FAILURE) {
php_error_docref(NULL, error_type, "Unable to initialize module '%s'", module_entry->name);
DL_UNLOAD(handle);
return FAILURE;
}
}
return SUCCESS;
}
/* }}} */
/* {{{ php_dl
*/
PHPAPI void php_dl(char *file, int type, zval *return_value, int start_now)
{
/* Load extension */
if (php_load_extension(file, type, start_now) == FAILURE) {
RETVAL_FALSE;
} else {
RETVAL_TRUE;
}
}
/* }}} */
PHP_MINFO_FUNCTION(dl)
{
php_info_print_table_row(2, "Dynamic Library Support", "enabled");
}
#else
PHPAPI void php_dl(char *file, int type, zval *return_value, int start_now)
{
php_error_docref(NULL, E_WARNING, "Cannot dynamically load %s - dynamic modules are not supported", file);
RETVAL_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
*/
|
