1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 5 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2014 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Brian Schaffner <brian@tool.net> |
16 | Shane Caraveo <shane@caraveo.com> |
17 | Zeev Suraski <zeev@zend.com> |
18 +----------------------------------------------------------------------+
19 */
20
21 /* $Id$ */
22
23 #include "php.h"
24 #include "dl.h"
25 #include "php_globals.h"
26 #include "php_ini.h"
27 #include "ext/standard/info.h"
28
29 #include "SAPI.h"
30
31 #if defined(HAVE_LIBDL)
32 #include <stdlib.h>
33 #include <stdio.h>
34 #ifdef HAVE_STRING_H
35 #include <string.h>
36 #else
37 #include <strings.h>
38 #endif
39 #ifdef PHP_WIN32
40 #include "win32/param.h"
41 #include "win32/winutil.h"
42 #define GET_DL_ERROR() php_win_err()
43 #elif defined(NETWARE)
44 #include <sys/param.h>
45 #define GET_DL_ERROR() dlerror()
46 #else
47 #include <sys/param.h>
48 #define GET_DL_ERROR() DL_ERROR()
49 #endif
50 #endif /* defined(HAVE_LIBDL) */
51
52 /* {{{ proto int dl(string extension_filename)
53 Load a PHP extension at runtime */
PHP_FUNCTION(dl)54 PHPAPI PHP_FUNCTION(dl)
55 {
56 char *filename;
57 int filename_len;
58
59 if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &filename, &filename_len) == FAILURE) {
60 return;
61 }
62
63 if (!PG(enable_dl)) {
64 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Dynamically loaded extensions aren't enabled");
65 RETURN_FALSE;
66 }
67
68 if (filename_len >= MAXPATHLEN) {
69 php_error_docref(NULL TSRMLS_CC, E_WARNING, "File name exceeds the maximum allowed length of %d characters", MAXPATHLEN);
70 RETURN_FALSE;
71 }
72
73 if ((strncmp(sapi_module.name, "cgi", 3) != 0) &&
74 (strcmp(sapi_module.name, "cli") != 0) &&
75 (strncmp(sapi_module.name, "embed", 5) != 0)
76 ) {
77 #ifdef ZTS
78 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Not supported in multithreaded Web servers - use extension=%s in your php.ini", filename);
79 RETURN_FALSE;
80 #else
81 php_error_docref(NULL TSRMLS_CC, E_DEPRECATED, "dl() is deprecated - use extension=%s in your php.ini", filename);
82 #endif
83 }
84
85 php_dl(filename, MODULE_TEMPORARY, return_value, 0 TSRMLS_CC);
86 if (Z_LVAL_P(return_value) == 1) {
87 EG(full_tables_cleanup) = 1;
88 }
89 }
90 /* }}} */
91
92 #if defined(HAVE_LIBDL)
93
94 #ifdef ZTS
95 #define USING_ZTS 1
96 #else
97 #define USING_ZTS 0
98 #endif
99
100 /* {{{ php_dl
101 */
php_load_extension(char * filename,int type,int start_now TSRMLS_DC)102 PHPAPI int php_load_extension(char *filename, int type, int start_now TSRMLS_DC) /* {{{ */
103 {
104 void *handle;
105 char *libpath;
106 zend_module_entry *module_entry;
107 zend_module_entry *(*get_module)(void);
108 int error_type;
109 char *extension_dir;
110
111 if (type == MODULE_PERSISTENT) {
112 extension_dir = INI_STR("extension_dir");
113 } else {
114 extension_dir = PG(extension_dir);
115 }
116
117 if (type == MODULE_TEMPORARY) {
118 error_type = E_WARNING;
119 } else {
120 error_type = E_CORE_WARNING;
121 }
122
123 /* Check if passed filename contains directory separators */
124 if (strchr(filename, '/') != NULL || strchr(filename, DEFAULT_SLASH) != NULL) {
125 /* Passing modules with full path is not supported for dynamically loaded extensions */
126 if (type == MODULE_TEMPORARY) {
127 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Temporary module name should contain only filename");
128 return FAILURE;
129 }
130 libpath = estrdup(filename);
131 } else if (extension_dir && extension_dir[0]) {
132 int extension_dir_len = strlen(extension_dir);
133
134 if (IS_SLASH(extension_dir[extension_dir_len-1])) {
135 spprintf(&libpath, 0, "%s%s", extension_dir, filename); /* SAFE */
136 } else {
137 spprintf(&libpath, 0, "%s%c%s", extension_dir, DEFAULT_SLASH, filename); /* SAFE */
138 }
139 } else {
140 return FAILURE; /* Not full path given or extension_dir is not set */
141 }
142
143 /* load dynamic symbol */
144 handle = DL_LOAD(libpath);
145 if (!handle) {
146 #if PHP_WIN32
147 char *err = GET_DL_ERROR();
148 if (err && (*err != "")) {
149 php_error_docref(NULL TSRMLS_CC, error_type, "Unable to load dynamic library '%s' - %s", libpath, err);
150 LocalFree(err);
151 } else {
152 php_error_docref(NULL TSRMLS_CC, error_type, "Unable to load dynamic library '%s' - %s", libpath, "Unknown reason");
153 }
154 #else
155 php_error_docref(NULL TSRMLS_CC, error_type, "Unable to load dynamic library '%s' - %s", libpath, GET_DL_ERROR());
156 GET_DL_ERROR(); /* free the buffer storing the error */
157 #endif
158 efree(libpath);
159 return FAILURE;
160 }
161 efree(libpath);
162
163 get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "get_module");
164
165 /* Some OS prepend _ to symbol names while their dynamic linker
166 * does not do that automatically. Thus we check manually for
167 * _get_module. */
168
169 if (!get_module) {
170 get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "_get_module");
171 }
172
173 if (!get_module) {
174 DL_UNLOAD(handle);
175 php_error_docref(NULL TSRMLS_CC, error_type, "Invalid library (maybe not a PHP library) '%s'", filename);
176 return FAILURE;
177 }
178 module_entry = get_module();
179 if (module_entry->zend_api != ZEND_MODULE_API_NO) {
180 /* Check for pre-4.1.0 module which has a slightly different module_entry structure :( */
181 struct pre_4_1_0_module_entry {
182 char *name;
183 zend_function_entry *functions;
184 int (*module_startup_func)(INIT_FUNC_ARGS);
185 int (*module_shutdown_func)(SHUTDOWN_FUNC_ARGS);
186 int (*request_startup_func)(INIT_FUNC_ARGS);
187 int (*request_shutdown_func)(SHUTDOWN_FUNC_ARGS);
188 void (*info_func)(ZEND_MODULE_INFO_FUNC_ARGS);
189 int (*global_startup_func)(void);
190 int (*global_shutdown_func)(void);
191 int globals_id;
192 int module_started;
193 unsigned char type;
194 void *handle;
195 int module_number;
196 unsigned char zend_debug;
197 unsigned char zts;
198 unsigned int zend_api;
199 };
200
201 const char *name;
202 int zend_api;
203
204 if ((((struct pre_4_1_0_module_entry *)module_entry)->zend_api > 20000000) &&
205 (((struct pre_4_1_0_module_entry *)module_entry)->zend_api < 20010901)
206 ) {
207 name = ((struct pre_4_1_0_module_entry *)module_entry)->name;
208 zend_api = ((struct pre_4_1_0_module_entry *)module_entry)->zend_api;
209 } else {
210 name = module_entry->name;
211 zend_api = module_entry->zend_api;
212 }
213
214 php_error_docref(NULL TSRMLS_CC, error_type,
215 "%s: Unable to initialize module\n"
216 "Module compiled with module API=%d\n"
217 "PHP compiled with module API=%d\n"
218 "These options need to match\n",
219 name, zend_api, ZEND_MODULE_API_NO);
220 DL_UNLOAD(handle);
221 return FAILURE;
222 }
223 if(strcmp(module_entry->build_id, ZEND_MODULE_BUILD_ID)) {
224 php_error_docref(NULL TSRMLS_CC, error_type,
225 "%s: Unable to initialize module\n"
226 "Module compiled with build ID=%s\n"
227 "PHP compiled with build ID=%s\n"
228 "These options need to match\n",
229 module_entry->name, module_entry->build_id, ZEND_MODULE_BUILD_ID);
230 DL_UNLOAD(handle);
231 return FAILURE;
232 }
233 module_entry->type = type;
234 module_entry->module_number = zend_next_free_module();
235 module_entry->handle = handle;
236
237 if ((module_entry = zend_register_module_ex(module_entry TSRMLS_CC)) == NULL) {
238 DL_UNLOAD(handle);
239 return FAILURE;
240 }
241
242 if ((type == MODULE_TEMPORARY || start_now) && zend_startup_module_ex(module_entry TSRMLS_CC) == FAILURE) {
243 DL_UNLOAD(handle);
244 return FAILURE;
245 }
246
247 if ((type == MODULE_TEMPORARY || start_now) && module_entry->request_startup_func) {
248 if (module_entry->request_startup_func(type, module_entry->module_number TSRMLS_CC) == FAILURE) {
249 php_error_docref(NULL TSRMLS_CC, error_type, "Unable to initialize module '%s'", module_entry->name);
250 DL_UNLOAD(handle);
251 return FAILURE;
252 }
253 }
254 return SUCCESS;
255 }
256 /* }}} */
257
258 /* {{{ php_dl
259 */
php_dl(char * file,int type,zval * return_value,int start_now TSRMLS_DC)260 PHPAPI void php_dl(char *file, int type, zval *return_value, int start_now TSRMLS_DC)
261 {
262 /* Load extension */
263 if (php_load_extension(file, type, start_now TSRMLS_CC) == FAILURE) {
264 RETVAL_FALSE;
265 } else {
266 RETVAL_TRUE;
267 }
268 }
269 /* }}} */
270
PHP_MINFO_FUNCTION(dl)271 PHP_MINFO_FUNCTION(dl)
272 {
273 php_info_print_table_row(2, "Dynamic Library Support", "enabled");
274 }
275
276 #else
277
php_dl(char * file,int type,zval * return_value,int start_now TSRMLS_DC)278 PHPAPI void php_dl(char *file, int type, zval *return_value, int start_now TSRMLS_DC)
279 {
280 php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot dynamically load %s - dynamic modules are not supported", file);
281 RETURN_FALSE;
282 }
283
PHP_MINFO_FUNCTION(dl)284 PHP_MINFO_FUNCTION(dl)
285 {
286 PUTS("Dynamic Library support not available<br />.\n");
287 }
288
289 #endif
290
291 /*
292 * Local variables:
293 * tab-width: 4
294 * c-basic-offset: 4
295 * End:
296 * vim600: sw=4 ts=4 fdm=marker
297 * vim<600: sw=4 ts=4
298 */
299
